基坑开挖引起的邻近建筑物桩基变形受力响应

张陈蓉; 黄茂松

基坑开挖引起的邻近建筑物桩基变形受力响应 English Version

张陈蓉^1,2,
黄茂松^1,2

(1.同济大学地下建筑与工程系上海 200092；2. 岩土及地下工程教育部重点实验室，上海 200092)

详细信息

作者简介:
张陈蓉（1982– )，女，讲师，从事基坑对环境影响研究。

中图分类号: TU473
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出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Behavior of pile foundation due to excavation-induced lateral soil movement

ZHANG Chen-rong^1,2,
HUANG Mao-song^1,2

(1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Shanghai 200092, China)

摘要

摘要: 基坑开挖时处于土体影响区域的邻近建筑物的桩基会受到影响，而产生附加的弯矩和变形。采用两阶段分析方法，将开挖产生的自由土体位移作为输入条件，基于Winkler地基模型以及桩土变形协调条件，建立单桩的水平位移控制方程。基于简化Mindlin方程考虑被动群桩的桩土相互影响得到群桩的遮拦效应，从而建立群桩控制微分方程，并采用有限差分法进行求解。通过与离心机试验结果的对比，验证了本文方法的合理性。
- 基坑开挖 /
- 被动桩 /
- Mindlin方程 /
- Winkler地基
Abstract: The excavation-induced lateral soil movement may adversely affect any nearby pile foundation systems. A two-stage method is used to determine the additional bending moments and deflections on pile foundations. Firstly, the free field soil movement is used as the input to acquire the lateral differential governing equation of a single pile based on the Winkler subgrade model and deformation compatibility condition. Then, the shielding effect due to pile-soil-pile interaction is considered by the simplified Mindlin’s equation. The pile group governing equations are obtained at last and are solved by the finite difference method. Comparisons are made between the observed behaviors of centrifugal model tests and those computed by the proposed method.
- excavation /
- passive pile /
- Mindlin equation /
- Winkler subgrade model

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参考文献(11)

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