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进行基坑的降水设计,关键是水文地质参数的确定,本文参考进行抽水试验时得到的水文地质参数建立了三维非稳定渗流模型,解出三维非稳定渗流微分方程,并和实测数据进行对比,验证了三维非稳定渗流模型的合理性和准确性,为深基坑降水工程的设计、施工和管理提供依据,最后提出了对应的降水方案,采用的是管井降水法。
The key point for the design of foundation pit dewatering is the determination of hydrogeological parameters. In this paper, a three-dimensional unsteady seepage model is established with reference to the hydrogeological parameters obtained during the pumping test. The three-dimensional unsteady seepage differential equation is solved and compared with the measured data. The rationality and accuracy of the three-dimensional unsteady seepage model are verified, which provides the basis for the design, construction and management of the deep foundation pit dewatering project. Finally, the corresponding precipitation plan is proposed, and the tube well dewatering method is adopted.