上海悬挂式地下连续墙基坑渗流侵蚀引起的沉降研究

张兴胜; 卢耀如; 王建秀; 刘琦

doi:10.11779/CJGE2014S2050

上海悬挂式地下连续墙基坑渗流侵蚀引起的沉降研究 English Version

1. 华北水利水电大学资源与环境学院,河南郑州 450011;
2. 同济大学地下建筑与工程系,上海 200092;
3. 法国国立市政工程大学土木工程与建筑系,沃昂夫兰 69120

基金项目: 高层次人才科研启动基金项目（201324）

详细信息

作者简介:
张兴胜(1978- ),男,讲师,主要从事工程地质,岩土工程方面的研究教学工作。E-mail: mfriend126@126.com。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Land subsidence caused by pits seepage erosion of deep foundation with suspended diaphragm walls in Shanghai

1. Institute of Resources and Environment, North China Institute of Water Resources and Electric Power, Zhengzhou 450011, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
3. Dé
partement Gé
nie Civil et Bâ
timent, Université
de Lyon, Ecole Nationale des Travaux Publics de l’
Etat, Vaulx-en-Velin 69120, France

摘要

摘要: 针对土体内部渗流侵蚀现象进行分析,揭示土体内部渗流侵蚀现象。固相部分土颗粒在渗流剪切作用下由固相变成可随液相一起流动的悬浮颗粒状态,建立土体内部渗流侵蚀物理模型,推导出描述渗流侵蚀的控制方程。针对上海第三类深基坑降水致使土体内部侵蚀从而诱发地面附加沉降开展研究,以上海典型的深基坑工程为研究对象,基于理论分析的数学物理模型及控制方程,进行数值建模计算分析,数值计算结果阐释了土体内部渗流侵蚀使导致地面附加沉降及变形。
- 渗流侵蚀 /
- 地面沉降 /
- 控制方程
Abstract: According to analysis of the phenomenon of internal erosion of soils, the phenomenon of internal erosion of soils is that some soil particles departing from soil skeletons become fluidized ones sharing the same velocity with fluid phase. A physical model for the internal erosion of soils is established, and the correspoding constitutive equation is given. The land subsidence caused by the internal erosion of soils owing to pumping confined groundwater is discussed during the construction of third-class deep foundation pits. The numerical model depends on a practical deep foundation pit consisting of 8 layers of soils of Shanghai area. Based on the mathematical-physical model, four governing equations and the finite element numerical method, the calculated results demonstrate that the internal erosion will cause additional land subsidence and deformation.
- seepage erosion /
- land subsidence /
- governing equation

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参考文献(7)

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