桥梁基坑在承压水作用下的渗流分析

The Seepage Analysis of Base Pit under Confined Water Pressure

文章以某桥梁基坑为例,总结了地下承压水对明挖基坑工程的危害,分析了承压水渗流对桥梁明挖基坑工程的影响。通过有限元程序计算承压水影响下的基坑周边和坑内土体的渗流场,表明在承压水的影响下,坑内土体的有效应力会降低,从而导致基坑整体安全系数降低。

Taking a base pit of one bridge as example,the article summarizes the danger found during the pit excavation caused by confined underground water and analyzes the effect of confined water seepage on this excavation.After calculating the seepage field of the soil body in and around the pit by using finite element program,the result shows that effective stress of soil body in the pit will decrease under confined water pressure,and the safety factor of the whole pit will decrease consequently.