考虑土体强度的建筑基坑突涌问题分析

谭松林

考虑土体强度的建筑基坑突涌问题分析

谭松林

中国地质大学工程学院, 湖北武汉 430074

详细信息

中图分类号: P642
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出版历程
- 收稿日期: 2001-09-23
- 刊出日期: 2002-03-25

Analyses of Abrupt Gush Problem of Soil and Water Based on Strength of Soil Body in Building Foundation Pit

TAN Song-lin

Engineering Faculty, China University of Geoscience, Wuhan 430074, China

摘要

摘要: 基于土体的强度特性, 并假设突涌破坏体为方柱体或圆柱体, 推导出了考虑土体强度的基坑突涌稳定性计算公式, 计算结果表明, 对于一般的粘性土, 考虑其强度后的抗力分项系数比不考虑强度的抗力分项系数增加二倍以上.汉口地区许多基坑开挖并没有出现突涌现象, 表明土体的抗剪强度对抗力起着不可忽视的作用, 因此考虑土体强度的突涌稳定性分析是比较接近工程实际的.
- 建筑基坑 /
- 突涌 /
- 土体强度 /
- 抗力分项系数
Abstract: According to the intensity peculiarity of soil body and the assumption that the destroyed bodies by abrupt gush are cuboids or cylinders, the writer deduced a calculation formula of stability of the abrupt gush of soil and water concerned about the above. And the calculation result manifests that, for generic cohesive soil, the partial safety factor of resistance, taken intensity into account, are over three times of those not done. No abrupt gush phenomena have come about in digging of building foundation pits in Hankou district, which demonstrates that the intensity of resistive shearing has a not to be neglectable effect on resistance. So the stability analyses of abrupt gush concerned about intensity of the soil body are relatively close to engineering reality.
- building foundation pit /
- abrupt gush of soil and water /
- strength of soil body /
- partial safety factor of resistance

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图 1 计算剖面

a.受力分析; b.内聚力分布; c.内摩擦力分布

Fig. 1. Calculating section

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表 1 抗力分项系数计算值

Table 1. Calculating values of coefficient of resisting force-component

参考文献(6)

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