
Dr Jubert Pineda
Senior Lecturer
School of Engineering
- Email:jubert.pineda@newcastle.edu.au
- Phone:(02) 4921 7034
Career Summary
Biography
Jubert Pineda got a Bachelor Degree in Civil Engineering from the Santo Tomas University (Bogotá, Colombia). He received a Master Degree in Geotechnical Engineering from the National University of Colombia (2004) and a PhD Degree in Geotechnical Engineering from the Technical University of Catalonia (UPC, Barcelona) in 2012. He works as Senior Lecturer at the Priority Research Centre for Geotechnical Science and Engineering (PRCGSE), School of Environment in the University of Newcastle Australia.
Research Expertise
- Experimental geomechanics.
- Mechanics of hard soils-soft rocks.
- Mechanics of natural soft soils
- Unsaturated geomaterials.
- Soil microstructure
Teaching Expertise
Geotechnical Site Characterization (CIVL4250 / CIVL6250).
Geomechanics 2 (CIVL3280 /CIVL6280)
Transportation Engineering and Design (CIVL2720)
Collaborations
Dr. Jubert Pineda has been involved in several research and consulting projects related with unsaturated soil mechanics, stability analysis of dams founded on argillaceous rocks as well as with high-quality sampling in soft soils at the Technical University of Catalonia (UPC). His current research interests include unsaturated soils and rocks, mechanics of natural soft clays and more recently Geo-Engineering problems related to Energy and Sustainability.
Qualifications
- PhD (Geotechnical Engineering), Universitat Politecnica de Catalunya - Spain
- Bachelor of Science (Civil Engineering), Universidad Santo Tomas - Columbia
- Master of Civil Engineering (Geotechnics), National University of Columbia - Bogota -Columbia
Keywords
- Experimental geomechanics
- Site Characterization
- Soil/rock microstructure
- Unsaturated soil/rock mechanics
- Weathering of geomaterials
- analytical geomechanics
Languages
- Spanish (Mother)
- English (Fluent)
- Catalan (Fluent)
Professional Experience
UON Appointment
Title | Organisation / Department |
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Senior Lecturer | University of Newcastle School of Engineering Australia |
Senior Lecturer | University of Newcastle School of Engineering Australia |
Teaching
Code | Course | Role | Duration |
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CIVL6250 |
Geotechnical Site Characterization Faculty of Engineering and Built Environment - The University of Newcastle (Australia) |
Course Coordinator | 24/2/2020 - 1/7/2020 |
CIVL3280 |
Geomechanics 2 Faculty of Engineering and Built Environment - The University of Newcastle (Australia) |
Course Coordinator | 18/2/2019 - 1/7/2020 |
CIVL2720 |
Transportation Engineering and Design Faculty of Engineering and Built Environment - The University of Newcastle (Australia) |
Course Coordinator | 30/7/2018 - 31/12/2019 |
CIVL4250 |
Geotechnical Site Characterization Faculty of Engineering and Built Environment - The University of Newcastle (Australia) |
Course Coordinator | 24/2/2020 - 1/7/2020 |
Publications
For publications that are currently unpublished or in-press, details are shown in italics.
Chapter (1 outputs)
Year | Citation | Altmetrics | Link | ||
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2015 |
Kouretzis G, Ansari Y, Pineda JA, Sheng D, 'Simulation of extreme deformation problems in viscoplastic strain-softening clays with the coupled Eulerian-Lagrangian method.', Jubilee volume: Andreas Anagnostopoulos. 50 years of service at the National Technical University of Athens, Tsotras, Smirnis, Zografou 309-322 (2015) [B1]
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Journal article (32 outputs)
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2020 |
Tor Lim G, Pineda J, Nathalie B, Carraro AH, Fourie A, 'Reply to the discussion by koutsoftas on effects of sampling disturbance in geotechnical design ', Canadian Geotechnical Journal, 57 944-946 (2020)
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2019 |
Lim GT, Pineda J, Boukpeti N, Carraro JAH, Fourie A, 'Effects of sampling disturbance in geotechnical design', Canadian Geotechnical Journal, 56 275-289 (2019) [C1]
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2019 |
Pineda JA, Kelly RB, Suwal L, Bates L, Sloan SW, 'The Ballina soft soil Field Testing Facility', AIMS GEOSCIENCES, 5 509-534 (2019) [C1]
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2018 |
Lim GT, Pineda JA, Boukpeti N, Carraro JAH, 'Predicted and measured behaviour of an embankment on PVD-improved Ballina clay', Computers and Geotechnics, 93 204-221 (2018) [C1]
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2018 |
Kelly RB, Sloan SW, Pineda JA, Kouretzis G, Huang J, 'Outcomes of the Newcastle symposium for the prediction of embankment behaviour on soft soil', Computers and Geotechnics, 93 9-41 (2018) [C1]
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2018 |
Wensrich CM, Pineda J, Luzin V, Suwal L, Kisi EH, Allameh-Haery H, 'Deformation and Fabric in Compacted Clay Soils', Physical Review Applied, 9 054003-1-054003-7 (2018) [C1]
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2018 |
Lloret-Cabot M, Wheeler SJ, Pineda JA, Romero E, Sheng D, 'From saturated to unsaturated conditions and vice versa', ACTA GEOTECHNICA, 13 15-37 (2018) [C1]
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2018 |
Lim GT, Pineda JA, Boukpeti N, Fourie A, Carraro JAH, 'Experimental assessment of sampling disturbance in calcareous silt', Geotechnique Letters, 8 240-247 (2018) [C1]
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2018 |
Doherty JP, Gourvenec S, Gaone FM, Pineda JA, Kelly R, O'Loughlin CD, et al., 'A novel web based application for. storing, managing and sharing geotechnical data, illustrated using the national soft soil field testing facility in Ballina, Australia', COMPUTERS AND GEOTECHNICS, 93 3-8 (2018) [C1]
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2017 |
Kouretzis G, Pineda J, Krabbenhøft K, Wilson L, 'Interpretation of vane shear tests for geotechnical stability calculations', Canadian Geotechnical Journal, 54 1775-1780 (2017) [C1]
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2017 |
Allameh-Haery H, Kisi E, Pineda J, Suwal LP, Fiedler T, 'Elastic properties of green expanded perlite particle compacts', POWDER TECHNOLOGY, 310 329-342 (2017) [C1]
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2017 |
Viana da Fonseca A, Pineda J, 'Getting high-quality samples in sensitive soils for advanced laboratory tests', Innovative Infrastructure Solutions, 2 (2017) [C1]
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2017 |
Kelly RB, Pineda JA, Bates L, Suwal LP, Fitzallen A, 'Site characterisation for the Ballina field testing facility', GEOTECHNIQUE, 67 279-300 (2017) [C1]
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2016 |
Burton GJ, Pineda JA, Sheng D, Airey DW, Zhang F, 'Exploring one-dimensional compression of compacted clay under constant degree of saturation paths', Geotechnique, 66 435-440 (2016) [C1] © 2016 ICE Publishing. All rights reserved. This note presents a novel approach for controlling the degree of saturation during one-dimensional compression of unsaturated soils. T... [more] © 2016 ICE Publishing. All rights reserved. This note presents a novel approach for controlling the degree of saturation during one-dimensional compression of unsaturated soils. This technique offers a simple and versatile way to study the hydromechanical response of unsaturated soils as well as the unsaturated¿saturated soil transition. By using a multi-stage approach, the same specimen can be used to evaluate the compressibility of unsaturated specimens at different degrees of saturation, which may reduce the long testing periods commonly required for unsaturated soil testing. The experimental results described in this paper show that the proposed technique is capable of controlling the degree of saturation within reasonable limits and provides an interesting approach to analyse the coupled hydraulic and mechanical behaviour of unsaturated soils.
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2016 |
Pineda JA, Suwal LP, Kelly RB, Bates L, Sloan SW, 'Characterisation of Ballina clay', GEOTECHNIQUE, 66 556-577 (2016) [C1]
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2016 |
Pineda JA, Liu X-F, Sloan SW, 'Effects of sampling in soft clay: a microstructural insight', Geotechnique: international journal of soil mechanics, 66 969-983 (2016) [C1]
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2015 |
Burton GJ, Pineda JA, Sheng D, Airey D, 'Microstructural changes of an undisturbed, reconstituted and compacted high plasticity clay subjected to wetting and drying', Engineering Geology, (2015) [C1] The behaviour of soil, and in particular compacted clay fill, can have significant implications on the safe and reliable operation of man-made infrastructure. The mechanical behav... [more] The behaviour of soil, and in particular compacted clay fill, can have significant implications on the safe and reliable operation of man-made infrastructure. The mechanical behaviour of soil (e.g. volume change and shear strength) is widely recognised as being associated with the microstructural arrangement (fabric/structure). In the case of high plasticity clays, despite the large amount of research carried out, soil microstructure and its evolution along mechanical and hydraulic paths are still not well understood. This makes incorporation of microstructural analysis difficult in engineering practice and highlights the need for further research. A comprehensive microstructural analysis of Maryland clay, a high plasticity residual soil, based on mercury intrusion porosimetry tests, is presented in this paper. Experimental results obtained from undisturbed, reconstituted and compacted specimens subjected to different hydraulic and mechanical paths are described. As with mechanical investigations, the reconstituted state is proposed to be used routinely as a reference state for comparison of undisturbed and compacted soil. The microstructural evolution of the compacted clay, prepared on the wet side of standard Proctor optimum water content, with an initially high void ratio, is examined along the main drying path. Importantly, a monotonic suction increase from the as-compacted state is shown to have negligible effect on the distribution of macro-pores. However, a new insight is provided based on the evolution of the dominant micro-pore entrance diameter which is shown to reduce with increased suction. This micro-pore entrance diameter is shown to correspond with the theoretical suction back-calculated from a simple capillary tube model, up to a limit. It is observed that, under oedometric conditions, the as-compacted microstructure is erased during saturation (soaking) and resembles the reconstituted microstructure. For this particular material and preparation conditions, it is demonstrated that a bimodal microstructure is not recovered on drying from a saturated state.
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2015 |
Kouretzis GP, Ansari Y, Pineda J, Kelly R, Sheng D, 'Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test', Geotechnique Letters, 5 91-95 (2015) [C1] This paper presents a study on the amplification of horizontal soil stresses during flat dilatometer test (DMT) blade penetration based on three-dimensional total and effective st... [more] This paper presents a study on the amplification of horizontal soil stresses during flat dilatometer test (DMT) blade penetration based on three-dimensional total and effective stress numerical analyses, while considering stress-flow coupling and large deformations. The focus here is on saturated clays, and the effect of soil stress history on the horizontal stress index is discussed in detail. The obtained results appear to be in good agreement with published and new field data, leading to the proposal of two new expressions for estimating the overconsolidation ratio and the earth pressure coefficient at rest directly from flat dilatometer tests in estuarine clays.
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2014 |
Pineda JA, Alonso EE, Romero E, 'Environmental degradation of claystones', Geotechnique, 64 64-82 (2014) [C1] The paper presents the results of a comprehensive experimental programme carried out to study the effects of relative humidity cycling on the degradation of argillaceous rocks. Li... [more] The paper presents the results of a comprehensive experimental programme carried out to study the effects of relative humidity cycling on the degradation of argillaceous rocks. Lilla claystone, a low-porosity Tertiary rock, was used for this purpose. Four aspects were analysed: (a) the influence of the number of relative humidity cycles; (b) the amplitude of relative humidity cycles; (c) the stress level; and (d) the effects of using liquid water or vapour during wetting paths. The application of relative humidity cycles induced a progressive degradation of the rock in terms of accumulative irreversible volumetric swelling, irreversible reduction in rock stiffness, and tensile strength. The irreversible expansion increased with the amplitude of the relative humidity change. However, it reduced with increase of the confining pressure. This irreversible behaviour accelerated when liquid water was used during the wetting paths. Microstructural analysis has shown that the degradation pattern of Lilla claystone was associated mainly with fissuring, as a consequence of non-uniform deformations of the clayey matrix. This phenomenon leads to the opening of fissures at the weaker interfaces of the clayey matrix with detrital, non-active minerals. A damage law derived in terms of the accumulated volumetric irreversible strain has been proposed to represent the progressive loss in volumetric and shear stiffness as well as the tensile strength.
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2014 |
Pineda J, Romero E, Alonso EE, Pérez T, 'A New High-Pressure Triaxial Apparatus for Inducing and Tracking Hydro-Mechanical Degradation of Clayey Rocks', Geotechnical Testing Journal, 37 20130163-20130163 (2014) [C1]
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2014 |
Pineda J, Suwal LP, Kelly R, 'Sampling and laboratory testing of Ballina clay', Australian Geomechanics Journal, 49 29-40 (2014) [C1] This paper discusses some topics related to the sampling and laboratory testing currently ongoing on Ballina clay (NSW). Emphasis is made on particular aspects of natural soft cla... [more] This paper discusses some topics related to the sampling and laboratory testing currently ongoing on Ballina clay (NSW). Emphasis is made on particular aspects of natural soft clays frequently neglected in laboratory procedures that may affect its mechanical response. Preliminary results are shown to highlight the importance of sample disturbance, salinity and rate effects in Ballina clay. Ongoing research as well as future activities are discussed in the last section of the paper. Implications for the current state of practice as well as the development of new constitutive models for soft clays are highlighted.
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2014 |
Lloret-Cabot M, Wheeler SJ, Pineda JA, Sheng D, Gens A, 'Relative performance of two unsaturated soil models using different constitutive variables', CANADIAN GEOTECHNICAL JOURNAL, 51 1423-1437 (2014) [C1]
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2014 |
Pineda JA, Romero E, De Gracia M, Sheng D, 'Shear strength degradation in claystones due to environmental effects', Geotechnique, 64 493-501 (2014) [C1] © 2014, Emerald Group Publishing Ltd. All rights reserved. This note explores the influence of environmental effects, as those induced by cyclic changes in relative humidity, on t... [more] © 2014, Emerald Group Publishing Ltd. All rights reserved. This note explores the influence of environmental effects, as those induced by cyclic changes in relative humidity, on the degradation of the shear strength parameters in Lilla claystone, a lowporosity clayey rock from northern Spain. The results of a comprehensive experimental programme, combining long-term relative humidity cycling tests with saturated direct shear tests, are described. A continuous monitoring of the evolution of volumetric strain during the previous relative humidity cycling is used to evaluate the swelling behaviour of the rock. Both undisturbed and degraded specimens are subjected to shearing at saturated conditions to determine the peak and post-rupture shear strength envelopes. The effects on rock brittleness and dilation angle are also analysed. Shear strength shows a strong dependence on the history of relative humidity cycling. In particular, the evolution of the peak shear strength parameters (c' and ¿') seem to be related to the accumulated irreversible strains developed during each cycle. A damage law, recently proposed by the authors, is used to represent the progressive degradation of the shear strength parameters as a function of the accumulated irreversible strains.
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2014 |
Kouretzis G, Ansari Y, Pineda J, Sheng D, 'Experimental and numerical investigation of rate and softening effects on the undrained shear strength of Ballina clay', Australian Geomechanics Journal, 49 51-57 (2014) [C1]
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2013 |
Kelly RB, Mayne P, Pineda JA, 'In situ and laboratory testing of soft clays', Australian Geomechanics, 48 61-72 (2013) [C1]
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Show 29 more journal articles |
Conference (46 outputs)
Year | Citation | Altmetrics | Link | ||||||||
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2019 |
Osses R, Pineda JA, Ovalle C, Linero S, Fityus S, 'Particle size effects on the water retention properties of colluvial sediments', 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 (2019) © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. This paper explores the influence of the particle size on the water retention properti... [more] © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. This paper explores the influence of the particle size on the water retention properties of a colluvial deposit derived from banded iron formations in the Pilbara region in Western Australia. A small-scale experimental program aimed at evaluating the water retentions curve of four particle fractions (1.18 - 2.36 mm, 0.60 - 1.18 mm, 75- 600 µm and < 75 µm) is described. Water retention curves, defined in terms of the gravimetric water content vs total suction, were obtained by exposing the specimens to a controlled wetting path using the vapour transfer technique. Total suction was measured using a dew-point psycrometer. The experimental results show an important increase in the maximum water retention capacity with decreasing the particle size. Finally, the influence of the water storage of each particle fraction on the water retention curve of mixed specimens, i.e. those composed by several fractions, is discussed.
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2019 |
Ge M, Pineda JA, Sheng D, Burton GJ, Li N, 'Collapse behaviour of compacted loess: Role of the stress level on soil microstructure', 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 (2019) © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. The paper presents preliminary results of an experimental study aimed at evaluating th... [more] © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. The paper presents preliminary results of an experimental study aimed at evaluating the influence of soil microstructure on the collapse behaviour of compacted loess from Xi'an, Shannxi province, China. Collapse behaviour was evaluated from one-dimensional compression tests in which compacted specimens were loaded to different vertical stresses, under constant water content conditions, prior soaking. Mercury intrusion porosimetry (MIP) tests and Scanning Electron Microscopy (SEM) analysis reveals a strong influence of the stress level on the soil microstructure formed by soaking under zero lateral deformation conditions.
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2019 |
Pineda JA, Sheng D, 'Environmental degradation of clayey rocks', 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 (2019) © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. This paper explores the mechanisms that lead to the degradation of clayey rocks when e... [more] © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. This paper explores the mechanisms that lead to the degradation of clayey rocks when exposed to environmental effects as those caused by unloading and cyclic variations in relative humidity. The following aspects are evaluated: (i) the number of applied RH cycles, N, (ii) the amplitude of relative humidity cycles, RH, (iii) the stress level (p-ua) and (iv) the effect of the fluid used to induce rock saturation (liquid water or vapour). The implementation of nonconventional experimental techniques for inducing and tracking rock degradation, at 'macro' and 'micro' scales, is described. An experimentally-based framework of behaviour is presented which may be used in practice for the evaluation of the degradation potential of clayey rocks.
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2019 |
Ou K, Pineda JA, Liu X, Sheng D, 'Osmotic effects on the microstructure of Ashfield shale', 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 (2019) © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. Preliminary results of a comprehensive microstructural investigation aimed at studying... [more] © 2019 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019. All rights reserved. Preliminary results of a comprehensive microstructural investigation aimed at studying the influence of osmotic effects in Ashfield shale, a low permeability sedimentary rock from the Sydney Basin (Australia), are presented in the paper. Natural rock specimens were exposed to different brine solutions to assess their influence on rock microstructure. Qualitative as well as quantitative experimental techniques were used to evaluate changes in mineralogical composition (XRD analysis), Cation Exchange Capacity (CEC), cation/ion concentration (chromatographic analysis), specific surface, structural arrangement (Scanning Electron Microscopy) as well as pore size distribution (Mercury Intrusion Porosimetry). Test results show an important influence of the applied osmotic potential on specific surface, CEC and pore size distribution and to a lesser extend the structural arrangement assessed via SEM. These changes occur without important variations in the mineralogical composition of the rock.
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2018 |
Lloret-Cabot M, Pineda JA, Sheng D, 'Numerical Implementation of a Critical State Model for Soft Rocks', Geotechnical Special Publication (2018) © Copyright 2018 by the American Society of Civil Engineers. All Rights Reserved. This paper details the basic tasks for the numerical implementation of a simple elasto-plastic cr... [more] © Copyright 2018 by the American Society of Civil Engineers. All Rights Reserved. This paper details the basic tasks for the numerical implementation of a simple elasto-plastic critical state model for bonded materials (i.e., soft rocks-hard soils) into the finite element program SNAC developed at the University of Newcastle in Australia. The first task described focusses on the derivation of the incremental constitutive relationships used to represent the mechanical response of a bonded/cemented material under saturated conditions. The second task presents how these stress-strain relations can be numerically integrated using an explicit substepping scheme with automatic error control. The third task concentrates on the verification of the substepping algorithm proposed. The model used to represent the saturated mechanical response of a bonded material combines the modified Cam clay with the constitutive relationships for cemented materials proposed in Gens and Nova (1993), but incorporates some flexibility on the degradation law adopted. The role of suction and other relevant aspects of unsaturated behaviour are also discussed at the end of the paper.
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2017 | Pineda JA, Romero E, Alonso E, 'Effects of Relative Humidity Cycling on the Tensile Strength of a Claystone', PanAm Unsaturated Soils 2017: Fundamentals, Dallas, TX, USA (2017) [E1] | ||||||||||
2017 |
Pineda JA, Liu X, Kelly RB, Suwal L, Sloan SW, 'Modifications in soil fabric due to tube sampling in soft clay', Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul, Korea (2017) [E1]
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2017 |
Kelly R, Sloan S, Pineda J, Huang J, Kouretzis G, Carter J, 'Performance of a trial embankment at the Ballina soft soil Field Testing Facility', Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017, Seoul, Korea (2017) [E1]
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2016 |
Wilson LJ, Kouretzis GP, Pineda JA, Kelly RB, 'On the determination of the undrained shear strength from vane shear testing in soft clays', Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016, Gold Coast, QLD (2016) [E1]
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2016 | Pineda JA, Kelly RB, Suwal L, Bates L, Sloan SW, 'Geotechnical characterization of Ballina clay', Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016, Gold Coast, QLD (2016) [E1] | ||||||||||
2016 |
Kelly RB, Pineda JA, Suwal L, 'A comparison of in-situ and laboratory resistivity measurements in soft clay', Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016, Gold Coast, QLD (2016) [E1]
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2016 | Pineda JA, 'Session report on sampling and laboratory testing', Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016, Gold Coast, QLD (2016) [E1] | ||||||||||
2016 |
Lloret Cabot M, Pineda JA, Sheng D, Cordao-Neto M, 'Some remarks on the mechanical yielding of unsaturated soils', Unsaturated Soil Mechanics - from Theory to Practice. Proceedings of the 6th Asia-Pacific Conference on Unsaturated Soils, Guilin, China (2016) [E1]
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2015 |
Arroyo M, Pineda JA, Sau N, Devincenzi M, Pérez N, 'Sample quality examination on silty soils', Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015 (2015) [E1] © The authors and ICE Publishing: All rights reserved, 2015. Mediterranean deltaic environments typically produce soil deposits in which silts dominate, granular intercalations ar... [more] © The authors and ICE Publishing: All rights reserved, 2015. Mediterranean deltaic environments typically produce soil deposits in which silts dominate, granular intercalations are frequent and the mineralogy includes an important carbonate fraction. One question still open is what sampling methods are most appropriate to recover undisturbed samples from these deposits and how best to evaluate disturbance on samples recovered from them. In this paper we present results from a testing campaign on silty deposits in which several sampling methods (Sherbrooke, Osterberg, Shelby) were used to recover sandy and silty clay samples from a Holocene lagoon deposit. Sample quality is established on oedometric specimens using normalized void ratio change on reconsolidation, comparisons of laboratory and field shear wave velocity and the ratio of suction to vertical « In situ » effective stress. Normalized void ratio change and shear wave based criteria are in agreement, and more so if the laboratory measurements are taken just after resaturation. The ratio of suction to normalised vertical effective stress shows no clear relation with normalized void ratio change.
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2015 |
Sau N, Arroyo M, Pérez N, Pineda JA, 'Using CAT to obtain density maps in Sherbrooke specimens of silty soils', Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 (2015) [E1] CAT (Computed Axial Tomography) has been sometimes used to obtain density maps of small core specimens of soft soil. Here it is applied to do the same with a Sherbrooke-type block... [more] CAT (Computed Axial Tomography) has been sometimes used to obtain density maps of small core specimens of soft soil. Here it is applied to do the same with a Sherbrooke-type block sample recovered at depth from a silt layer. Sherbrooke block samples are considered as the one more closely related to the material 'in situ', because the sampling method excludes practically any other alteration process apart from deviatoric stress relief. Sherbrooke samples are large typically 25 cm in diameter and 35 in height. Because of this large specimen size the standard medical scanner used for the CAT test presented several artifacts (noise, rings, outliers) that made difficult the quantitative interpretation of the resulting images. The procedures employed to remove those artifacts from the images and obtain a map of density of the block sample are described here. Validation with independent laboratory measurements of density is shown to result in a good agreement. © 2015 Taylor & Francis Group.
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2015 |
Lim GT, Boukpeti N, Carraro A, Pineda JA, 'Testing tube specimens from soft clay deposits containing variable amounts of shells', Proceedings of the 6th International Symposium on Deformation Charateristics of Geometerials, Buenos Aries, Argentina (2015) [E1]
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2014 |
Yang C, Sheng D, Carter JP, Pineda J, Kelly R, 'From compression behavior to plastic anisotropy of reconstituted soft soils', Geotechnical Special Publication (2014) [E1] The plastic anisotropy of reconstituted soft soils is described from the compression behaviour observed during radial loading paths in stress space. A unique relationship is estab... [more] The plastic anisotropy of reconstituted soft soils is described from the compression behaviour observed during radial loading paths in stress space. A unique relationship is established between the orientation of the yield surface and the corresponding normal compression line, which indicates that a stabilized fabric is maintained under continuous loading along radial stress paths. The equilibrium orientation angle of the plastic potential surface is obtained explicitly. A new rotational hardening law is proposed by considering the dependence of the evolution of anisotropic fabric with the current stress condition and plastic strain. An elastoplastic constitutive model for anisotropic soil is formulated within the framework of Critical State Soil Mechanics. Validation with experimental data and predictions from other models demonstrate the feasibility of the basic concept and the capacity of the proposed new model. © 2014 American Society of Civil Engineers.
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2014 | Sheng D, Kelly RB, Pineda JA, Bates L, 'Numerical study of rate effects in cone penetration test', CPT 14, Las Vegas, NV (2014) [E1] | ||||||||||
2014 | Pineda JA, McConnell A, Kelly RB, 'Performance of an innovative direct-push piston sampler in soft clay', CPT14, Las Vegas, NV (2014) [E1] | ||||||||||
2013 |
Pineda JA, Romero E, Tarragó D, Tauler E, Alonso EE, 'Microstructural evaluation of the water sensitivity of clayey rocks.', American Society of Civil Engineers, Viena-Austria (2013) [E2]
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2013 |
Pineda JA, Kelly R, Bates L, Sheng D, Sloan S, 'Effects of pore fluid salinity on the shear strength of a soft clay', Poromechanics V - Proceedings of the 5th Biot Conference on Poromechanics, Vienna, Austria (2013) [E2]
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2011 |
Hoyos LR, Suescún EA, Pineda JA, Puppala AJ, 'Small-strain stiffness of compacted silty sand using a proximitor-based suction-controlled resonant column device', Unsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils (2011) Small-strain soil stiffness properties such as shear wave velocity, shear modulus, and material damping, are key subsoil parameters for an adequate analysis and design of unsatura... [more] Small-strain soil stiffness properties such as shear wave velocity, shear modulus, and material damping, are key subsoil parameters for an adequate analysis and design of unsaturated earth structures subject to static and non-static loading. Most conventional geotechnical testing techniques, however, are not able to capture this small-strain behavior and, hence, vastly underestimate the true soil stiffness, mainly due to inaccuracies in small-strain measurements. In the United States, a great deal of research efforts has been devoted to field and laboratory based measurements of soil suction, assessments of soil-water retention properties, and analyses of swell-collapse behavior. However, very few efforts have been focused on small-strain response of unsaturated soils and their dynamic characterization at small strains. This paper introduces a suction-controlled, proximitor-based resonant column device featuring a PCP-15U pressure control panel that allows for the implementation of the axis-translation technique via the independent control of pore-air and pore-water pressures in the specimen. A preliminary series of resonant column tests were conducted on statically compacted samples of silty sand for a range of constant suction states between 50 kPa and 400 kPa, at different net confining pressures. Results show the critical role of matric suction on the soil's small-strain response. The apparatus also features a full set of self-contained bender elements for simultaneous testing under both techniques. However, preliminary results from an on-going bender element testing program are beyond the scope of the present work. © 2011 Taylor & Francis Group, London.
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2009 |
Mitaritonna G, Pineda J, Arroyo M, Romero E, 'The effect of drying-wetting cycles on the seismic properties of an anisotropic claystone', Poromechanics IV - 4th Biot Conference on Poromechanics (2009) The evolution of bar and shear wave velocities during a drying wetting cycle on a claystone is presented. There is a clear relationship with total suction, established by means of... [more] The evolution of bar and shear wave velocities during a drying wetting cycle on a claystone is presented. There is a clear relationship with total suction, established by means of the material water retention curve. The stiffening effect of drying decreases with sample damage. The multiaxial bender element technique is firstly applied to rocklike materials with partial success.
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2006 |
Pineda JA, Colmenares JE, 'Stress-strain-suction behaviour of two clayey materials under unconfined conditions', Geotechnical Special Publication (2006) A series of unconfined undrained triaxial tests were performed, on compacted and reconstituted samples of clayey soils, at different degrees of saturation. Pore water pressure cha... [more] A series of unconfined undrained triaxial tests were performed, on compacted and reconstituted samples of clayey soils, at different degrees of saturation. Pore water pressure changes were recorded. Stress-strain-suction relationships were studied and analyzed. The soil water retention curve (SWRC) or any scanning curve exhibit an S-inverted shape. At low suctions the curve has a small gradient which increases and tends to be constant at intermediate suctions. Two different stress-strain-suction behaviour patterns were identified depending on the initial position (before shearing) of the soil sample on the SWRC. Samples initially located in the zone of small gradient, of the SWRC, exhibited a stress-strain-suction behaviour which is similar to that of normally consolidated samples (i.e. strain hardening), whereas samples initially in the higher gradient zone, of the SWRC, exhibited a similar behaviour to that of over-consolidated samples (i.e. dilatancy occurred). On shearing, the behaviour of the soil at peak conditions was not dependant of the initial fabric. There was no influence of the suction history of the sample before shearing. Copyright ASCE 2006.
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Show 43 more conferences |
Report (1 outputs)
Year | Citation | Altmetrics | Link |
---|---|---|---|
2013 | Pineda JA, Sheng D, 'Subsidence: an overview of causes, risks and future developments for Coal Seam Gas production', Office of the NSW Chief Scientist and Engineer (2013) [R1] |
Grants and Funding
Summary
Number of grants | 11 |
---|---|
Total funding | $882,019 |
Click on a grant title below to expand the full details for that specific grant.
20202 grants / $68,909
Characterisation of the compressibility and shear strength of CID overburden materials$40,909
Funding body: SRK Consulting Pty Ltd
Funding body | SRK Consulting Pty Ltd |
---|---|
Project Team | Professor Stephen Fityus, Doctor Jubert Pineda |
Scheme | Research Grant |
Role | Investigator |
Funding Start | 2020 |
Funding Finish | 2020 |
GNo | G2001076 |
Type Of Funding | C3111 - Aust For profit |
Category | 3111 |
UON | Y |
Characterization of problematic soils for encapsulated embankments$28,000
Funding body: SMEC Australia Pty Ltd
Funding body | SMEC Australia Pty Ltd |
---|---|
Project Team | Professor Olivier Buzzi, Professor Stephen Fityus, Doctor Jubert Pineda |
Scheme | Research Grant |
Role | Investigator |
Funding Start | 2020 |
Funding Finish | 2022 |
GNo | G2000512 |
Type Of Funding | C3111 - Aust For profit |
Category | 3111 |
UON | Y |
20181 grants / $30,080
Deformation and texture in clay soils 3: complex strain paths$30,080
Funding body: ANSTO (Australian Nuclear Science and Technology Organisation)
Funding body | ANSTO (Australian Nuclear Science and Technology Organisation) |
---|---|
Project Team | Pineda J.A., Wensrich C. & Kisi E. |
Scheme | The Australian National Beamline Facility |
Role | Lead |
Funding Start | 2018 |
Funding Finish | 2018 |
GNo | |
Type Of Funding | Aust Competitive - Non Commonwealth |
Category | 1NS |
UON | N |
20171 grants / $8,525
2017 International Visitor from Imperial College London, UK$8,525
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Doctor Jubert Pineda, Professor David Potts |
Scheme | International Research Visiting Fellowship |
Role | Lead |
Funding Start | 2017 |
Funding Finish | 2017 |
GNo | G1600887 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20161 grants / $10,000
Early Career Researcher Equipment Grant$10,000
Funding body: The University of Newcastle - Research and Innovation Division
Funding body | The University of Newcastle - Research and Innovation Division |
---|---|
Project Team | Dr. Jubert Pineda |
Scheme | Early Career Researcher HDR Candidate Scholarship |
Role | Lead |
Funding Start | 2016 |
Funding Finish | 2016 |
GNo | |
Type Of Funding | Internal |
Category | INTE |
UON | N |
20154 grants / $747,608
Mechanics of Hard Soils and Soft Rocks$677,108
Funding body: ARC (Australian Research Council)
Funding body | ARC (Australian Research Council) |
---|---|
Project Team | Prof DAICHAO Sheng, Doctor Jubert Pineda, Professor Antonio Gens |
Scheme | Discovery Projects |
Role | Investigator |
Funding Start | 2015 |
Funding Finish | 2018 |
GNo | G1400377 |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | Y |
Deformation and texture in clay soils 2: effects of load path $34,500
Funding body: ANSTO (Australian Nuclear Science and Technology Organisation)
Funding body | ANSTO (Australian Nuclear Science and Technology Organisation) |
---|---|
Project Team | Dr. Chirs Wensrich & Dr. Jubert Pineda |
Scheme | The Australian National Beamline Facility |
Role | Investigator |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | N |
Deformation and texture in clay soils$34,500
Funding body: ANSTO (Australian Nuclear Science and Technology Organisation)
Funding body | ANSTO (Australian Nuclear Science and Technology Organisation) |
---|---|
Project Team | Prof. Erich Kisi, Dr. Chris Wensrich & Dr. Jubert Pineda |
Scheme | The Australian National Beamline Facility |
Role | Investigator |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | |
Type Of Funding | Aust Competitive - Commonwealth |
Category | 1CS |
UON | N |
6th International Symposium on Deformation Characteristics of Geomaterials, Buenos Aires Argentina, 15-18 November 2015$1,500
Funding body: University of Newcastle - Faculty of Engineering & Built Environment
Funding body | University of Newcastle - Faculty of Engineering & Built Environment |
---|---|
Project Team | Doctor Jubert Pineda |
Scheme | Travel Grant |
Role | Lead |
Funding Start | 2015 |
Funding Finish | 2015 |
GNo | G1501141 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
20132 grants / $16,897
Subsidence due to CSG extraction$11,897
Funding body: NSW Trade & Investment
Funding body | NSW Trade & Investment |
---|---|
Project Team | Prof DAICHAO Sheng, Doctor Jubert Pineda |
Scheme | Office of the Chief Scientist and Engineer Project |
Role | Investigator |
Funding Start | 2013 |
Funding Finish | 2013 |
GNo | G1300873 |
Type Of Funding | Other Public Sector - State |
Category | 2OPS |
UON | Y |
Hydro-Mechanical coupling in unsaturated soils: experimental observations and constitutive modelling$5,000
Funding body: University of Newcastle
Funding body | University of Newcastle |
---|---|
Project Team | Doctor Marti Lloret Cabot, Doctor Jubert Pineda, Prof DAICHAO Sheng |
Scheme | New Staff Grant |
Role | Investigator |
Funding Start | 2013 |
Funding Finish | 2013 |
GNo | G1301107 |
Type Of Funding | Internal |
Category | INTE |
UON | Y |
Research Supervision
Number of supervisions
Current Supervision
Commenced | Level of Study | Research Title | Program | Supervisor Type |
---|---|---|---|---|
2020 | PhD | The Soil Washing of PFAS Contaminated Soil | PhD (Environmental Eng), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2020 | PhD | Modelling the Time-Dependent Behaviour of Soft Soils Under Generalised Loading Conditions | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2018 | PhD | Physico-Chemical Interactions in Natural Soft Soils. | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2017 | PhD | Generalised Pipe-Unsaturated Sand Interaction Modelling | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2015 | PhD | Experimental Investigation of Chemo-mechanical Behaviour of Ashfield Shale | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
Past Supervision
Year | Level of Study | Research Title | Program | Supervisor Type |
---|---|---|---|---|
2020 | PhD | Experimental Study on the Hydro-Mechanical Behaviour of compacted Loess: Role of Soil Microstructure | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2020 | PhD | Advanced Numerical Methods for Predicting the Behaviour of Soft Clay Soils | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2020 | PhD | Environmental Effects on the Hydro-Mechanical Behaviour of Ashfield Shale | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2020 | PhD | Optimal Geotechnical Site Investigations for Slope Design | PhD (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Co-Supervisor |
2018 | Masters | Strain Rate Effects in Ballina Clay: Implications for Settlement and Stability of Embankments | M Philosophy (Civil Eng), College of Engineering, Science and Environment, The University of Newcastle | Principal Supervisor |
2018 | PhD | Sampling of soft clays and intermediate soils | Civil Engineering, The University of Western Australia | Co-Supervisor |
News
ARC Discovery Project funding success
November 21, 2014
Dr Jubert Pineda
Position
Senior Lecturer
School of Engineering
College of Engineering, Science and Environment
Contact Details
jubert.pineda@newcastle.edu.au | |
Phone | (02) 4921 7034 |
Fax | (02) 49217034 |
Office
Room | EA/214 |
---|---|
Building | Engineering Building |