Influence of Groundwater Lowering on Pile Group Foundation of High Speed Railway Bridge

被引：0
|
作者：
Dong L. [1 ]
Su Y. [1 ]
Fu L. [2 ]
Bian X. [2 ,3 ]
机构：
[1] Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing
[2] Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, 310058, Zhejiang
[3] MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, 310058, Zhejiang
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2019年 / 40卷 / 04期
关键词：
Additional settlement; Axial force; Bridge; Finite element analysis; Groundwater; High speed railway; Pile group foundation;
D O I：
10.3969/j.issn.1001-4632.2019.04.01
中图分类号：
学科分类号：
摘要：
A three-dimensional finite element model of groundwater, soil and pile foundation interaction was established by using the finite software of Plaxis to study the influence of groundwater lowering on the pile group foundation of high speed railway. Results show that the influence of groundwater lowering amplitude on pile group foundation is obvious. When groundwater drops, the pile top settlement and axial force of foundation increase. The responses of pile foundations at different positions are different. There is a larger increase in the load on the inner pile top in the pile group, and there is no obvious change in the axial force at the top of the outer corner pile. The ground settlement is affected by pile group, but the foundation settlement near the pile foundation is smaller. The ground settlement has little relation with pile length when the distance from pile groups is more than 30 m. Based on this study, the limit of water lowering amplitude for high speed railway bridge foundation is proposed, and the allowable water lowering is about 7 m when the maximum settlement is 40 mm. © 2019, Editorial Department of China Railway Science. All right reserved.
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页码：1 / 9
页数：8
相关论文
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