摘要
在地下水位较高的地区开挖基坑时渗流作用是普遍存在的。假定坑内外地下水渗流为一维稳定的条件,推导了坑内外被动区和主动区的水头计算公式,并结合算例分析了渗流对坑底被动区的有效应力和坑底回弹变形的影响。研究表明,渗流作用使得坑底的有效应力减小,进而引起坑底土层回弹量增大。
Seepage is ubiquitous duringexcavation in high groundwater table. Analytical formulas for calculating the water head in active and passive zones of foundation pit are derived under the assumption that the seepage is one-dimensional and steady. The influence of seepage on the effective stress and the heave of foundation pit base is analyzed through a numerical example. It is indicated that seepage causes the decrease of effective stress and thus the increase of heave of soil mass beneath foundation pit base.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第11期1749-1752,共4页
Rock and Soil Mechanics
关键词
渗流
回弹
水头
基坑开挖
有效应力
seepage
heave
water head
excavation
effective stress
