基坑降水引起的地基应力变化分析

详细信息

Analysis on Foundation Stress Changes Caused by Foundation Pit Dewatering

摘要: 基坑降水对周围地表沉降的破坏已引起广泛关注,传统计算地表沉降的方法是基于总应力不变的观点,计算有效应力增量,且忽略由渗流引起的有效应力增量,结果误差较大。鉴于此,研究了在总应力变化时和考虑渗流作用下,计算土层中有效应力增量的公式,以便满足降水引起的基坑周围地表沉降的计算要求。
- 基坑降水 /
- 地表沉降 /
- 一维渗流 /
- 有效应力增量
Abstract: The destroy of surrounding ground settlement caused by foundation pit dewatering has attracted wide attention.The traditional calculation method of ground settlement was based on the view of unchangeable total stress.Calculating the increment of effective stress and neglecting the increment of effective stress caused by seepage will easily cause the big error.So,based on the condition of changeable total stress and seepage,this paper gives out the calculation formula of soil layer increment of effective stress to meet the calculation requirement of surrounding ground settlement caused by foundation pit dewatering.
- foundation pit dewatering /
- ground settlement /
- one-dimensional seepage /
- increment of effective stress

[1]	李相然,岳同助.城市地下工程实用技术[M].北京:中国建材工业出版社,2000.
[2]	吴林高.工程降水设计施工与基坑渗流理论[M].北京:人民交通出版社,2003.
[3]	谢康和.成层土中基坑开挖降水引起的地表沉降分析[J].浙江大学学报:工学版,2002(3)
[4]	张莲花.基坑降水引起的沉降变形时空规律及降水控制研究[D].成都:成都理工学院,2001.