工程桩对基坑稳定性的影响及其计算方法研究

郑刚; 张涛; 程雪松

doi:10.11779/CJGE2017S2002

工程桩对基坑稳定性的影响及其计算方法研究 English Version

郑刚^{1, 2},
张涛¹,
程雪松^1,2, ,

1. 天津大学建筑工程学院,天津300072;
2. 滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072

基金项目: 国家自然科学基金项目（51508382,41630641）; 国家重点研发计划（2016YFC0802008）

详细信息

作者简介:
郑刚(1967- ),男,教授,博士生导师,从事土力学及岩土工程的教学与科研工作。E-mail: zhenggang1967@163.com。

通讯作者:
程雪松，E-mail：cheng_xuesong@163.com

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出版历程
- 收稿日期: 2017-08-01
- 发布日期: 2017-12-19

Effect of foundation piles on excavation stability and its calculation

ZHENG Gang^{1, 2},
ZHANG Tao¹,
CHENG Xue-song^1,2, ,

1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China

摘要

摘要: 通过有限差分数值模拟和极限平衡法对比计算,对单排支撑的基坑破坏模式及坑内工程桩对基坑稳定性的影响进行了分析,得到以下结论：坑内工程桩的存在能在一定程度上提高基坑稳定安全系数。单排支撑基坑的失稳滑动面更接近于绕支撑点转动的圆弧滑动面。当基坑发生失稳破坏时,工程桩更容易发生弯曲破坏,考虑坑内工程桩对基坑稳定的贡献时,应取工程桩抗弯破坏时的等效抗剪强度和实际抗剪强度中的较小值。
- 基坑稳定 /
- 工程桩 /
- 有限差分法 /
- 极限平衡法 /
- 等效抗剪强度
Abstract: Using the finite difference method and the limit equilibrium method, the failure modes of excavations and the effect of foundation piles in excavations on excavation stability are investigated. The following conclusions are drawn: (1) The foundation piles can improve the safety factor of stability to certain degree. (2) Instability sliding surface of excavations with single level of horizontal struts is close to the circular slip surface rotating about the supporting point of the strut. (3) When instability of excavations occurs, the foundation piles tend to be subjected to bending failure rather than shear failure. While taking the contribution of foundation piles into consideration, the smaller value between the equivalent shear strength and real shear strength should be used.
- excavation stability /
- foundation pile /
- finite difference method /
- limit equilibrium method /
- equivalent shear strength

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参考文献(7)

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