武汉某超大型深基坑整体抽水试验分析

Analysis of the Whole Pumping Test of a Super Large Deep Foundation Excavation in Wuhan

根据地质勘察资料,对武汉长江航运中心项目深基坑工程进行整体抽水试验,依据试验结果,对周边各类建筑物的影响结果进行预测分析。同时,建立二维非稳定渗流模型,借助渗流分析软件SEEP/W模拟抽水过程中基坑内、外渗流场的变化情况,以现场观测井水位实测数据为依据,反演出TRD渗透系数,从而验证了模型及其相关参数在工程应用中的合理性和准确性,为深基坑开挖对应的降水设计提供依据。

According to geological prospecting data, the pumping test was carried out on the project of deep foundation excavation of Wuhan Yangtze River Shipping Center project, depending on the test results, it will predict and analyze the influence of the surrounding buildings. At the same time, a two dimensional unsteady seepage model is established, with the seepage analysis software SEEP/W to simulate the change of flow field about the intravasation and extravasation during the pumping process, based on the measured data of the well water levels in the field to perform inverse analysis of TRD permeability coefficient, thus, it checked the rationality and accuracy of the model and its parameters in engineering application and provided basis for dewatering design of deep foundation excavation.