苏州地区粉土夹层中基坑降水实践

Deep Excavation Dewatering in Suzhou Soil with Silt Lenses

苏州地区进行深基坑设计与施工时,多遇到具有微承压含水性质的粉土夹层混合土层,该层降水成功与否直接影响工程的顺利进行。结合具体基坑降水案例,论述了该夹层成分、富水性及降水方案的选择。实践证明,位于该层的基坑工程,可采用小型群井进行辅助降水。

In the deep excavation practice in the urban area of Suzhou City,the slightly artesian silt lenses are frequently encountered.The success of the dewatering in this layer is critical to the smoothness of the entire deep excavation project.This paper resents a case study of the deep excavation project.The material components,water bearing characteristics and the selection of the dewatering scheme are discussed.The use of small well point groups is a feasible and cost effective solution in these soils.