基坑开挖卸载诱发的渗流分析

基坑开挖卸载诱发的渗流分析 English Version

1.Department of Geotechnical Engineering Tongji University Shanghai 200092 China 2.Institute of Geotechnical Engineering Zhejiang University Hangzhou 310027 China

摘要: 在地下水位比较高的地区开挖基坑时,卸载和坑内外水头差诱发的渗流对基坑工程有很大的影响。基于非稳定渗流理论,推导了一维渗流作用下基坑主动区和被动区的水头计算公式,并分析了主动区和被动区的水头随时间的变化规律,研究了坑内外水头变化对作用在围护结构上的孔隙水压力、土压力以及侧压力的影响。
- 基坑 /
- 渗流 /
- 水头 /
- 侧压力
Abstract: Unloading and water head difference between the inside and outside of a foundation pit would induce seepage in high water table ground,which had significant influence on excavation engineering.Based on the unsteady seepage theory,analytical formulas for calculating the water head in active and passive zones of a foundation pit were obtained under the assumption that groundwater seepage was one-dimensional.Variations of water head with time in active and passive zones were analyzed,and the influence of water head variation on pore water pressure,earth pressure and lateral pressure acting on retaining structure was further investigated.
- excavation /
- seepage /
- water head /
- lateral pressure