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中国土木工程学会第九届土力学及岩土工程学术会议

作者： G.C.Y.Chan C.J.Lee V.S.H.Chan C.W.W.Ng C.FLeung The Hong Kong University of Science and Technology Hong Kong The Hong Kong University of Science and Technology Hong Kong The Hong Kong University of Science and Technology Hong Kong The Hong Kong University of Science and Technology Hong Kong The National University of Singapore Singapore

＜正＞ A centrifuge model test was carride out to investigate the behaviour of a floating pile in consolidating soil. Measured soil and plie settlements are presented and deduced dragload on the model pile are compared with the aand β- methods. Insights into the pile behaviour in consolidating soil, the effects of pile tip location , in particular, on pile settlement are reported and discussed.

关键词： centrifuge modelling consolidation downdrag dragload floating pile soil/structure interaction

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Performance of composite foundations with different load transfer platforms and substratum stiffness over silty clay

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Journal of Mountain Science 2024年第5期21卷 1761-1774页

作者： ZHANG Shuming LIU Yan YUAN Shengyang LIU Xianfeng JIANG Guanlu LIU Junyan School of Civil Engineering and Architecture University of JinanJinan 250022China The Engineering Technology Research Center for Urban Underground Engineering Supporting and Risk Monitoring of Shandong Province Jinan 250022China School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-speed Railway Engineering Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China

The semi-rigid pile-supported composite foundation is widely used in highway projects due to its effectiveness in increasing the bearing capacity and stability of *** is crucial to understand the stress distribution across the embankment width and the behaviour of unreinforced ***,five centrifuge tests were conducted to examine the bearing and deformation behaviours of NPRS(Non-Connected Piled Raft Systems)and GRPS(GeosyntheticReinforced Pile-Supported systems)with varying substratum stiffness,then a comparative analysis was conducted on embankment settlement,pressures underneath the embankments,and axial forces along the *** results indicated that greater substratum stiffness correlates with reduced settlement and deformation at various *** occurring 5 meters from the embankment toe includes settlement in NPRS and upward movement in *** potential sliding surface is primarily located within the embankment in NPRS,whereas it may extend through both the embankment and foundation in *** pile-soil stress ratio and efficiency in NPRS are higher than in GRPS across the *** axial force borne by end-bearing piles is significantly greater than that by floating *** the buried depth increases,the axial force in GRPS initially rises then declines,whereas in NPRS,it remains relatively constant within a certain range before *** study aids in assessing the applicability of composite foundations in complex railway environments and provides a reference for procedural measures under similar conditions.

关键词： centrifuge modelling Composite foundation Failure mode Load transfer platform Substratum Stiffness Silty clay

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