Dr Xianfeng Liu

Dr Xianfeng Liu

Research Associate

School of Engineering

Career Summary

Biography

Dr Xianfeng Liu completed his bachelor and master degrees in  Southwest Jiaotong University (China) in 2005 and obtained a PhD in Geomechanics in 2010 from Ecole Centrale de Nantes (France). After a Postdoc position in ECN, he joined the University of Newcastle in 2011 where he now is Research Academic. His research spans from experimental unsaturated soils to rock mechanics and geoenvironmental engineering as well as soil dynamics. 










Qualifications

  • PhD, Ecole Centrale de Nantes - France
  • Master of Engineering, Southwest Jiaotong University - China

Keywords

  • Contaminants transport in soils
  • Multi-physics modelling (THMC)
  • Soil dynamics
  • Unsaturated soils

Languages

  • Mandarin (Mother)
  • English (Fluent)
  • French (Fluent)

Fields of Research

Code Description Percentage
090501 Civil Geotechnical Engineering 100
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (17 outputs)

Year Citation Altmetrics Link
2016 Liu X, Zhang C, Yuan S, Fityus S, Sloan SW, Buzzi O, 'Effect of High Temperature on Mineralogy, Microstructure, Shear Stiffness and Tensile Strength of Two Australian Mudstones', Rock Mechanics and Rock Engineering, 49 3513-3524 (2016)

© 2016, Springer-Verlag Wien.This study aims at providing quality experimental data on the effects of temperature on tensile strength and small strain shear stiffness of two Aust... [more]

© 2016, Springer-Verlag Wien.This study aims at providing quality experimental data on the effects of temperature on tensile strength and small strain shear stiffness of two Australian mudstones. The objective is to provide multiscale data in view of developing a numerical model that can capture and simulate the complex multiphysics of underground coal fire propagation. Two mudstones were collected in the Hunter Valley, close to a known underground coal fire, referred to as ¿Burning Mountain.¿ The rock specimens were heated to a range of temperatures (maximum of 900¿°C) for 24¿h, and the materials were comprehensively characterized by X-ray diffraction, thermal gravimetric analyses, optical microscopy and scanning electron microscopy. In addition, mercury intrusion porosimetry was used in order to track changes in pore size distribution with temperature. Investigations at microscale were complemented by testing at the macroscale. In particular, the paper focuses on the evolution of the tensile strength and small strain shear stiffness as the materials are subjected to heating treatment. Results show that both parameters evolve in a non-monotonic manner with temperature. The observed mechanical responses are fully explained and corroborated by microstructural observations.

DOI 10.1007/s00603-016-1024-y
Co-authors Scott Sloan, Olivier Buzzi
2016 Liu XF, de Carteret R, Buzzi OP, Fityus SG, 'Microstructural effects of environmental salinity on unbound granular road pavement material upon drying', Acta Geotechnica, 11 445-451 (2016) [C1]
DOI 10.1007/s11440-015-0393-9
Co-authors Olivier Buzzi, Stephen Fityus
2016 Zhang C, Jiang G, Liu X, Buzzi O, 'Arching in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution', Computers and Geotechnics, 77 11-25 (2016)

© 2016 Elsevier Ltd.The objective of this study is to improve the understanding of load transfer mechanism of Geogrid-Reinforced Pile-Supported Embankments (GRPS) via a new 3D an... [more]

© 2016 Elsevier Ltd.The objective of this study is to improve the understanding of load transfer mechanism of Geogrid-Reinforced Pile-Supported Embankments (GRPS) via a new 3D analytical approach and comprehensive field tests. A full-scale embankment was built over a silty clay of medium compressibility as a part of the Liuzhou-to-Nanning High-speed Railway (LNHR) in China. Six sections of the embankment have been heavily instrumented producing comprehensive data of high quality. Field measurements evidence the existence of soil arching, membrane contribution and ground reaction, phenomena that are all contributing to load transfer mechanism. The new 3D analytical arching model accounts for a triangular arrangement of piles and, unlike existing methods, accounts for all relevant components of load transfer mechanisms. In addition, two key parameters were introduced in the model: an elastoplastic state parameter of soil arching (a) and a coefficient of equivalent uniform stress (ß). The former was used to satisfy the load equilibrium in case of partial arching while the latter was adopted to allow possible nonuniform vertical stress acting on the ground surface. The so-called ground reaction method was incorporated in an innovative manner to take into account the reactive support of the subsoil beneath geogrid-reinforced layer when estimating the tension development in the geogrid. Finally, the performance of the proposed model was assessed against several existing models and field measurements. Results showed that the new model presented herein outperforms existing models and satisfactorily predicts both the pile efficiency and tension development within the geogrid.

DOI 10.1016/j.compgeo.2016.03.007
Co-authors Olivier Buzzi
2016 Liu X, Yuan S, Sieffert Y, Fityus S, Buzzi O, 'Changes in Mineralogy, Microstructure, Compressive Strength and Intrinsic Permeability of Two Sedimentary Rocks Subjected to High-Temperature Heating', Rock Mechanics and Rock Engineering, 1-14 (2016) [C1]

© 2016 Springer-Verlag WienThis study falls in the context of underground coal fires where burning coal can elevate the temperature of a rock mass in excess of 1000°. The object... [more]

© 2016 Springer-Verlag WienThis study falls in the context of underground coal fires where burning coal can elevate the temperature of a rock mass in excess of 1000°. The objective of the research is to experimentally characterize the change in mechanical behaviour, mineralogy and microstructural texture of two sedimentary rocks when subjected to temperatures up to 1200 °C for 24 h. Specimens of local sandstone and mudstone were comprehensively characterized by X-ray diffraction and thermal-gravimetric analysis. These analyses were complemented by optical microscopy and scanning electron microscopy on polished thin sections. In addition, pore size distributions of these heated rocks were inferred by means of mercury intrusion porosimetry. These results were extended to an estimation of the intrinsic permeability using the Katz¿Thompson model. Investigations at micro scale were followed by mechanical testing (both unconfined and confined compression tests) on cylindrical specimens of heated rocks. Results show that the unconfined compressive strength (UCS) of both rock types tends to increase when the temperatures increases up to 900 °C, beyond which the UCS tends to slightly decrease. As for the permeability, a clear increase in intrinsic permeability was observed for both rocks. The macroscopic behaviour was found to be fully consistent with the changes observed at micro scale.

DOI 10.1007/s00603-016-0950-z
Citations Scopus - 1
Co-authors Olivier Buzzi, Stephen Fityus
2016 Pineda JA, Liu X-F, Sloan SW, 'Effects of sampling in soft clay: a microstructural insight', Geotechnique: international journal of soil mechanics, (2016)
DOI 10.1680/jgeot.15.P.217
Co-authors Scott Sloan, Jubert Pineda
2016 Hubert J, Liu XF, Collin F, 'Numerical modeling of the long term behavior of Municipal Solid Waste in a bioreactor landfill', COMPUTERS AND GEOTECHNICS, 72 152-170 (2016) [C1]
DOI 10.1016/j.compgeo.2015.10.007
2016 Liu X, Hicher P, Muresan B, Saiyouri N, Hicher P-Y, 'Heavy metal retention properties of kaolin and bentonite in a wide range of concentration and different pH conditions', APPLIED CLAY SCIENCE, 119 365-374 (2016) [C1]
DOI 10.1016/j.clay.2015.09.021
Citations Scopus - 1Web of Science - 1
2015 Zhang C-L, Jiang G-L, Liu X-F, Wang Z-M, 'Lateral displacement of silty clay under cement-fly ash-gravel pile-supported embankments: Analytical consideration and field evidence', Journal of Central South University, 22 1477-1489 (2015) [C1]
DOI 10.1007/s11771-015-2665-9
2015 Liu X, Buzzi O, Yuan S, Mendes J, Fityus S, 'Multi-scale characterization of the retention and shrinkage behaviour of four Australian clayey soils.', Canadian Geotechnical Journal, 53 854-870 (2015) [C1]
DOI 10.1139/cgj-2015-0145
Citations Scopus - 1Web of Science - 1
Co-authors Olivier Buzzi, Stephen Fityus
2015 Yang C, Liu X, Liu X, Yang C, Carter JP, 'Constitutive modelling of Otaniemi soft clay in both natural and reconstituted states', Computers and Geotechnics, 70 83-95 (2015) [C1]

© 2015 Elsevier Ltd.A rate-independent anisotropic elastoplastic constitutive model for natural soft clays is proposed, with emphasis on the effects of cementation or structure a... [more]

© 2015 Elsevier Ltd.A rate-independent anisotropic elastoplastic constitutive model for natural soft clays is proposed, with emphasis on the effects of cementation or structure and fabric anisotropy. The characteristic non-linear normal compression line for structured soils is described by defining a variable compressibility as a function of plastic straining. No reference to the 'intrinsic' reconstituted state is required. The effect of plastic anisotropy is investigated from virgin constant stress ratio consolidation tests, which provide an accurate description of the equilibrium states of soil fabric. The change of fabric anisotropy is correlated with the change of inclination of the yield and plastic potential surfaces via a pair of improved rotational hardening laws. Experiments on Otaniemi clay samples in both natural and reconstituted states are simulated. Comparisons of numerical predictions with experimental data illustrate the feasibility and advantage of the proposed methodology to describe the mechanical behaviour of natural soft clays.

DOI 10.1016/j.compgeo.2015.07.018
Citations Scopus - 1Web of Science - 1
Co-authors Chao Yang, John Carter
2015 Zhang C, Jiang G, Liu X, Wang Z, 'Deformation performance of cement-fly ash-gravel pile-supported embankments over silty clay of medium compressibility: a case study', Arabian Journal of Geosciences, 8 4495-4507 (2015) [C1]
DOI 10.1007/s12517-014-1559-8
Citations Scopus - 2
2014 Liu X, Buzzi O, 'Use of hand-spray plaster as a coating for soil bulk volume measurement', Geotechnical Testing Journal, 37 (2014) [C1]

This paper presents a new coating material [hand-spray plaster (HSP)] used to measure the bulk volume of soil specimens having irregular shapes. The new method has been validated ... [more]

This paper presents a new coating material [hand-spray plaster (HSP)] used to measure the bulk volume of soil specimens having irregular shapes. The new method has been validated against two benchmark methods, namely, the wax and plastic bag methods, by conducting swelling and shrinkage tests on intact Maryland clay. The results show that the new method yields similar values of volume but with much reduced data scattering. The HSP method is also far easier to use than the other two methods. Finally, the stiffness of the coating has been measured and its restraining effect has been found to be negligible. Some of the benefits of using the HSP method are: (1) limited fluid retention by the specimen postimmersion for volume measurement, (2) reduced water-intake rate with elimination of cracking upon swelling caused by high-suction gradients, (3) absence of the restraining effect on specimens upon swelling, and (4) accurate determination of the swelling and shrinkage curves with only one specimen per curve. Copyright by ASTM Int'l (all rights reserved).

DOI 10.1520/GTJ20130091
Citations Scopus - 1Web of Science - 1
Co-authors Olivier Buzzi
2014 Buzzi O, Sieffert Y, Mendes J, Liu X, Giacomini A, Seedsman R, 'Strength of an Australian Coal Under Low Confinement', Rock Mechanics and Rock Engineering, 47 2265-2270 (2014) [C1]
DOI 10.1007/s00603-013-0493-5
Citations Scopus - 2Web of Science - 4
Co-authors Anna Giacomini, Olivier Buzzi
2014 de Carteret R, Buzzi O, Fityus S, Liu X, 'Effect of Naturally Occurring Salts on Tensile and Shear Strength of Sealed Granular Road Pavements', JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 26 (2014) [C1]
DOI 10.1061/(ASCE)MT.1943-5533.0000938
Citations Scopus - 2Web of Science - 1
Co-authors Stephen Fityus, Olivier Buzzi
2012 Liu X, Collin F, Buzzi OP, Sloan SW, 'Numerical modelling of ground temperature evolution as a result of underground coal fire', Australian Geomechanics Journal, 47 27-32 (2012) [C1]
Co-authors Scott Sloan, Olivier Buzzi
2012 Liu X, Hammad T, Saiyouri N, Hattab M, 'Physical chemical analysis of marine sediment cementation from the Gulf of Guinea', Comptes Rendus - Geoscience, 344 461-470 (2012) [C1]
2007 Jiang G, Liu X, Zhang J, Zhao R, 'Shaking table test of composite foundation reinforcement of saturated silty soil for high speed railway', Frontiers of Architecture and Civil Engineering in China, 1 353-360 (2007) [C1]
DOI 10.1007/s11709-007-0047-6
Show 14 more journal articles

Conference (8 outputs)

Year Citation Altmetrics Link
2015 Liu X, Buzzi OP, Fityus S, Sieffert Y, 'Mechanical behaviour of an australian mudstone subjected to heating treatment at high-temperatures', 13th ISRM International Congress of Rock Mechanics Proceedings (2015) [E1]
Co-authors Stephen Fityus, Olivier Buzzi
2014 Liu XF, Buzzi OP, Vaunat J, 'Influence of stress-volume path on swelling behavior of an expansive clay', Unsaturated Soils: Research and Applications (2014) [E1]
DOI 10.1201/b17034-134
Citations Scopus - 1Web of Science - 1
Co-authors Olivier Buzzi
2014 Yang C, Yang CS, Liu XF, 'An improved modeling of hydro-mechanical behavior of unsaturated compacted soils', Unsaturated Soils: Research and Applications (2014) [E1]
DOI 10.1201/b17034-41
Co-authors Chao Yang
2012 Liu X, Collin F, Buzzi OP, Sloan SW, 'Numerical modelling of ground temperature evolution and soil subsidence as a result of underground coal fire', 11th Australian New Zealand Conference on Geomechanics Conference Proceedings (2012) [E1]
Co-authors Olivier Buzzi, Scott Sloan
2012 Liu X, Buzzi OP, 'Experimental characterization of shrinkage behaviour of Australian expansive soils', Unsaturated Soils: Research and Applications (2012) [E1]
Co-authors Olivier Buzzi
2010 Liu X, Saiyouri N, Hicher P, 'Heavy metal transport in satured clays: experimental study and numerical simulation', Third Edition of the Euro Mediterranean Symposium on Advances in Geomaterial and Structures (2010) [E1]
2010 Liu X, Saiyiuri N, Hicher P, 'Influence of Induced pH changes on heavy metals retention by kaolinite and bentonite', Proceedings Of The Geoshanghai International Conference (2010) [E1]
DOI 10.1061/41105(378)18
2009 Saiyouri N, Liu X, Khalil T, Muresan B, Hicher P, 'Reactive transport in granular media: modeling the erosion and filtration', Proceedings of the International Symposium on Computational Geomechanics (2009) [E1]
Show 5 more conferences
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Research Supervision

Number of supervisions

Completed0
Current1

Total current UON EFTSL

PhD0.2

Current Supervision

Commenced Level of Study Research Title / Program / Supervisor Type
2013 PhD Microstructural Changes of Expansive Soils upon Swelling and its Effect on Permeability
PhD (Civil Eng), Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
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Dr Xianfeng Liu

Position

Research Associate
Geotechnical group
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

Email xianfeng.liu@newcastle.edu.au
Phone (02) 4921 5331
Mobile 0470031851

Office

Room EA205
Building EA
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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