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PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Analyzing the Effect of Groundwater Extraction on High Speed Railway Pile Raft Composite Foundation Treatment
H. Xiao1,2, X. Tao2, H. LuWei1,2 and W. SiXing1,2
1Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, China
H. Xiao, X. Tao, H. LuWei, W. SiXing, "Analyzing the Effect of Groundwater Extraction on High Speed Railway Pile Raft Composite Foundation Treatment", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 17, 2016. doi:10.4203/ccp.110.17
Keywords: groundwater, cement fly-ash gravel pile, pile raft composite foundation, numerical simulation, finite element, high-speed railway, ABAQUS.
There are numerous characteristics of high speed railways, such as high smooth, high safety, high speed and high density. Groundwater results in the increase of additional foundation stress along a railway, soil compression and the decline of pile foundations, so that uneven settlement will emerge among the subgrade and piers, causing great difficulty for the operation and maintenance of the railway lines, and directly affecting the safe operation of trains. This paper considers high-speed railway ballastless-track reinforced using cement fly-ash gravel. A three-dimensional fluid-structure coupling model is established. The effect of high-speed railway deformation caused by agricultural water, industrial water and daily life water, as well as the impact of longitudinal and transverse deformation related to the duration of the pumping is analysed. The research indicates, that pumping near the high-speed railway will lead obviously to uneven settlement along the longitudinal direction of line and have an impact on high-speed driving.
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