基于p-y曲线法分析隧道开挖条件下邻近桩基的水平反应

孙庆; 杨敏; 汪浩; 周环宇

基于p-y曲线法分析隧道开挖条件下邻近桩基的水平反应 English Version

孙庆^1,2,
杨敏^2,3,
汪浩¹,
周环宇¹

1. 中国建筑第三工程局有限公司技术中心，湖北武汉 430070; 2. 同济大学岩土及地下工程教育部重点实验室，上海 200092; 3. 同济大学地下建筑与工程系，上海 200092

基金项目: 国家自然科学基金项目(41172248)

详细信息

作者简介:
孙庆(1981– )，男，吉林舒兰人，博士，主要从事岩土工程方面的施工、设计和科研工作。E-mail: sunqingking12345@163.com

中图分类号: TU473
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出版历程
- 收稿日期: 2011-12-19
- 发布日期: 2012-12-19

Tunnelling-induced lateral response of adjacent piles based on p-y curve

1. Technical Center, China Construction Third Engineering Bureau Co., Ltd., Wuhan 430070, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 在分析隧道开挖条件下邻近桩基的水平反应时,基于考虑桩土界面非线性的p-y曲线,引入统一极限桩土相互作用力的概念,利用有限差分方法通过迭代求解给出隧道开挖与邻近单桩相互作用的弹塑性解答.在群桩计算中引入考虑群桩效应的p-因子(f_m),从而得到群桩中各单桩的p-y曲线,进而通过有限差分方法求得考虑轴力情况下群桩中各单桩的变形,转角,弯矩和剪力.同时通过已有试验和实测数据对本文方法进行验证分析,结果表明本文方法与试验与实测结果得到了较好的一致性;分析隧道开挖条件下邻近桩基的水平反应时,群桩中的第一排桩与同位置处的单桩性质相似,后排桩由于群桩效应的存在受到的影响将明显小于前排桩.
- 隧道开挖 /
- p-y曲线 /
- 群桩 /
- p-因子
Abstract: In the analysis of lateral response of adjacent piles due to tunnelling, the elastic-plastic solution of tunnel-pile interaction is given based on p-y curve considering nonlinearity of pile-soil interface. The finite difference method and the concept of limiting force profile are used during calculation. For pile groups, the p-y curve of each pile in the pile groups is obtained using p-mutiplier (f_m). Then the results of pile deformation, rotation, bending moment and shear force can be given under axial force using the finite difference method. Moreover, the results obtained by the present method are compared with those from existing tests and case histories. The results show that there is a good agreement between the present computed profiles and test/field data. In the analysis of lateral response of adjacent piles due to tunnelling, the lateral response of the leading row piles in the pile groups is identical to that of the corresponding single pile. The tunnelling effects of the rear piles are lower than those of the front piles due to a positive pile group effect.
- tunnel excavation /
- p-y curve /
- pile group /
- p-multiplier

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参考文献(30)

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