悬挂式止水帷幕基坑控水优化方法

基于地下水渗流连续性原理并结合达西定律,推导出了止水帷幕在不同插入深度下的圆形基坑涌水量计算公式.在此基础上,借鉴我国船舶工程中广泛采用的阻力系数法,提出了考虑悬挂式止水帷幕的地表沉降量计算方法.最后综合涌水量和地面沉降计算方法,以控水成本为目标,以基坑涌水量和坑外地面沉降量为约束条件,建立了一套完整的兼顾基坑设计安全...

Water Control Optimization Method of Foundation Pit with Suspended Waterproof Curtain

The calculation formulas for water inflow of a circular foundation pit with different insertion depths of waterproof curtain are proposed based on the principle of seepage continuity of groundwater and Darcy’s law. The analytical solution of ground subsidence outside the foundation pit with different insertion depths of waterproof curtain is proposed according to the method of resistance coefficient widely used in ship engineering in China. Finally， an applicable procedure of dewatering of foundation pit with waterproof curtain partially penetrating aquifers was developed， in which water control cost is set as the target， and ground subsidence and groundwater inflow are set as the constraints conditions considering both safety and economy of foundation pit design. The proposed optimization method for water control was applied in a project site in Tongzhou district， Beijing.