深基坑工程渗流场特性分析

Study on seepage field characteristics of foundation pit excavation.

深基坑工程的施工特点决定了其渗流场水力条件的复杂性 .大量的工程实践显示 ,渗流问题是许多基坑工程事故的主要或重要原因 .本文采用有限单元法分析了基坑渗流场分布特性 .比较了不同水力条件下渗流作用对基坑土体渗透稳定性的影响 ,探讨了工程中可能出现的不利因素 ,特别是防渗体破坏情况对基坑安全造成的危害性 .本文的工作也表明 ,利用数值方法分析基坑渗流场分布特性 ,对于深基坑工程的安全性评价和工程施工都具有重要的指导意义 .

During foundation pit excavation, the hydraulic condition of the corresponding seepage field is more complicated. More material from practices indicates seepage is the main reason that causes collapses in many projects. With the finite element method, this paper studies the seepage field's characteristics of foundation pit excavation under several hydraulic conditions. Some aspects that harm to the project stability are discussed, especially the case under the breakage of waterproof wall. This paper emphasizes that using numerical method to simulate seepage field of pit excavation is more important to project design and construction.