上海地区第三硬土层间粉土夹层抽水沉降效应分析

Analysis on the Pumping Settlement Effect of the Silty Soil Interlayer in the Third Hard Soil Layer in Shanghai

摘要:

现场对上海第三硬土层间粉土夹层即第⑩夹层承压含水层实施抽水试验，对水位、地表沉降及深层沉降进行观测，采用三维渗流及比奥固结理论模拟，分析了深层承压水抽水过程中的地层垂向变形与地下水水位变化之间的关系，为超深基坑地下水控制提供了依据。

Abstract:

Pumping test is carried out in the silty soil interlayer in the third hard soil layer in Shanghai, that is, 10th layer of confined aquifer. The water level, surface settlement and deep layer settlement are observed. 3-dimensional seepage and Biots consolidation theory simulation are used to analyze the relationship between the vertical deformation of the stratum and the change of the groundwater table during the deep confined water pumping process, which provide the basis for groundwater control in ultra deep foundation pit.