考虑降水渗流效应的土钉—桩锚支护结构深基坑数值分析

摘要

Based on an example of pit construction in Han Dan,three-dimensional finite difference numerical model considering the dynamic coupling of stress field and seepage field is established in software FLAC3D.Our study revealed the rule of internal force of supporting structure,displacement of piles,and ground surface settlement with the precipitation process and three-dimensional stability evaluation influenced by the change of groundwater level is carried out by using the strength reduction technique.Our result will serve as a good reference to similar foundation pit engineering.%根据邯郸某基坑工程实例,采用FLAC3D数值分析软件建立了考虑应力场—渗流场动态耦合作用的三维数值模型,揭示了基坑支护结构内力、位移及坑外地表沉降随降水过程的变化规律,探讨了地下水位变化对基坑稳定性的影响.研究成果对类似的深基坑工程具有一定的借鉴价值.