基坑开挖工程中渗流场的三维有限元分析

Analysis of 3D finite element of seepage fields in foundation pit excavation project

很多工程施工时需要开挖基坑。基坑降水是施工中一个难点。在地下水位较高的地区开挖基坑时,地下水会不断渗入基坑,容易造成流砂和边坡失稳。另外,当遇到承压含水层时,由于上部土体的卸荷,坑底有被顶破而发生涌砂、隆起的危险。因此,如何控制好地下水,减小其对基坑开挖和周围环境的负面影响,是基坑工程特别是深基坑工程设计与施工的一个难题,通过计算分析,给出了基坑开挖中地下水渗流的有效解决方法。

While many projects were constructing, they need excavated foundation pit. When a foundation pit is excavated in high water level, groundwater may cause drift sand and slope failure due to the influent from seepage. In addition, foundation base may be in dangerous conditions such as sand pipings and upheaval deformations because of unloading soil above artesian aquifer. Therefore, the eontrolment of groundwater and reduction of its negative influences upon foundation pit excavation and surrounding environment become a puzzle in deep excavation projects, by the calculating and analyse in the article,a effective solution about the subsurface seepage flow in foudation rits has been put forward.