基于三维数值分析的基坑突涌临界水头确定方法

›› 2012, Vol. 33 ›› Issue (S1): 251-256.

基于三维数值分析的基坑突涌临界水头确定方法

高广运¹，柴俊磊²，张先林³，金清山⁴

1. 同济大学岩土及地下工程教育部重点实验室，上海 200092；2. 中铁二院华东勘察设计有限责任公司，杭州 310004； 3. 上海市规划和国土资源局，上海 200003；4. 上海市岩土地质研究院有限公司，上海 200072

收稿日期:2012-03-24 出版日期:2012-09-11 发布日期:2012-09-21
作者简介:高广运，男，1961年生，博士，教授，主要从事桩基、土动力学方向的研究
基金资助:
上海市规土局资助项目（No. FDZ2008034）

Critical water head determination of water gushing in foundation pit based on three-dimensional numerical analysis

GAO Guang-yun¹, CHAI Jun-lei², ZHANG Xian-lin³, JIN Qing-shan⁴

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji Univesity, Shanghai 200092, China; 2. CREEC East China Survey and Design Co., Ltd., Hangzhou 310004, China; 3. Shanghai Municipal Bureau of Planning and Land Resources, Shanghai 200003, China; 4.Shanghai Geotechnical Engineering and Geology Institute Co. Ltd., Shanghai 200072, China

Received:2012-03-24 Online:2012-09-11 Published:2012-09-21

摘要/Abstract

摘要： 针对既有基坑突涌稳定分析方法存在的问题，采用应变相关修正剑桥模型（SDMCC），借助FLAC3D软件建立了考虑承压水作用的三维有限差分模型，得到了坑底隆起变形与承压水头Hw之间的关系。随着承压水头的增大，坑底隆起变形分为3个阶段：缓慢匀速变形、加速变形和急剧匀速变形。提出一种确定基坑突涌临界水头Hwcr的数值方法，并将该方法与其他文献临界水头计算结果进行对比。

Abstract: Considering the existing calculation methods’ shortcomings of water gushing in foundation pit. The strain dependent modi?ed Cam-clay (SDMCC) model adopted to model the soil behavior and confined water was taken into account in the finite difference model by FLAC3D. With the increase of the confined water head (Hw), the foundation pit heave was divided into three stages: slow uniform deformation, accelerating deformation and sharp uniform deformation. A new method for determining critical water head (Hwcr) of water gushing in foundation pit was presented based on numerical analysis; and the calculation result of the new method was compared with other methods.

Key words: strain dependent modified Cam-clay, confined water, foundation pit basal heave, water gushing in foundation pit, critical water head

中图分类号:

TU46

高广运，柴俊磊，张先林，金清山 . 基于三维数值分析的基坑突涌临界水头确定方法[J]. , 2012, 33(S1): 251-256.

GAO Guang-yun , CHAI Jun-le , ZHANG Xian-lin , JIN Qing-shan . Critical water head determination of water gushing in foundation pit based on three-dimensional numerical analysis[J]. , 2012, 33(S1): 251-256.

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