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| An energy-based pore water pressure model for evaluating liquefaction of saturated sands |
| ZHANG Jianlei1，CHENG Qiangong1，2，3，LI Yan4，ZHANG Enming1，WU Jiujiang5，WANG Yufeng1 |
(1. Department of Geological Engineering，Southwest Jiaotong University，Chengdu，Sichuan 611765，China；2. Key Laboratory of High-Speed Railway Engineering，Ministry of Education，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；3. State-Province Joint Engineering Laboratory of Spatial Information Technology for High-Speed Railway Safety，Southwest Jiaotong University，Chengdu，Sichuan 611756，China；4. Chengdu Surveying Geotechnical Research Institute Co.，Ltd. of MCC，Chengdu，Sichuan 610023，China；5. Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province，Southwest University of Science and Technology，Mianyang，Sichuan 621010，China)
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Abstract Evaluation of site liquefaction，according to which some remediation measures can be adopted to avoid liquefaction-induced damage，has important research value. Based on cyclic triaxial numerical tests，in this paper， a new energy-based pore pressure model for evaluating site liquefaction was proposed by taking the Arias intensity of seismic waves as the energy parameter，and the effects of the consolidation pressure and the consolidation ratio on the proposed model were discussed. The energy-based pore pressure model was verified by the cyclic triaxial tests results. Based on the verified model，a new method taking into consideration of the permeability and the shear stress reduction coefficient was proposed for evaluating the liquefaction. The new method was verified by centrifuge tests and numerical simulation. The results show that the new method can accurately predict the generation and accumulation of the excess pore pressure and hence，can be used to evaluate the liquefaction of ground.
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2021, Vol. 40 
