临近基坑条形基础地基承载力减损性状的数值模拟

王红雨; 杨敏; 王伟

doi:10.13204/j.gyjz200606017

临近基坑条形基础地基承载力减损性状的数值模拟

doi: 10.13204/j.gyjz200606017

1.
1. 宁夏大学土木与水利工程学院银川 750021;
2.
2. 同济大学地下建筑与工程系上海 200092

基金项目:

国家科学技术部专项研究基金(2002EG231201)

详细信息

作者简介:
王红雨男 1961年12月出生博士副教授 E-mail:why.nxts@163.com

中图分类号: TU470
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- 文章访问数: 69
- HTML全文浏览量: 9
- PDF下载量: 111
- 被引次数: 0
出版历程
- 收稿日期: 2005-09-26
- 刊出日期: 2006-06-20

NUMERICAL STUDIES OF LOSS OF BEARING CAPACITY FOR STRIP FOOTINGS NEAR EXCAVATIONS

1.
1. College of Civil and Hydraulic Engineering,Ningxia University Yinchuan 750021;
2.
2. Department of Geotechnical Engineering,Tongji University Shanghai 200092

摘要

摘要: 利用数值模拟技术,参照Terzaghi计算地基承载力的叠加公式,分别按土的黏聚力、基础埋深(超载)和土的自重三个影响因素,估算临近基坑地基极限荷载,给出了不同工况下临近基坑条形浅基础地基承载力系数。通过对极限荷载作用下各工况应力场和位移场动态模拟发现,在基坑开挖深度变化范围内,潜在的滑移面均出现在基坑坡脚附近,大致沿坡脚以上地基土体滑动。并且利用获得的数值模拟结果,对临近基坑地基承载力减损情况进行了分析、讨论。
- 临近基坑 /
- 承载力减损 /
- 条形基础 /
- 数值模拟
Abstract: Using the numerical simulating technique, the limit loads with various parameters for strip footings near excavations are obtained. As accepted in other proposals, the estimate of the bearing capacity near an excavation is calculated here respectively from the terms dependent on the cohesion, the footing depth ( overburden) and the soil weight based on Terzaghi. s assumption of superposition. According to the stress and displacement filed simulated within the range of xcavation depths, it is found that potential critical sliding surfaces are allowed above-the-toe failures. And further, the characteristics of bearing capacity adjacent to excavations are discussed using the results that obtained in terms of the bearing capacity coefficients from numerical modeling.
- near excavation /
- loss of bearing capacity /
- strip footing /
- numerical simulating

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参考文献(9)

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王红雨,杨敏.临近基坑条形基础地基承载力减损值的简化上限解.同济大学学报,2006,34(3):319-324

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