基于ANSYS的悬挂式止水帷幕对坑外水位影响分析

Effects of Pensile Curtains on Water Level outside the Foundation Pit Based on ANSYS

根据渗流方程与热传导方程的相似性,利用ANSYS温度场模块分析渗流场,并验证其可靠性。结合南京长江漫滩某具体项目,根据ANSYS有限元模拟分析,通过计算悬挂式止水帷幕不同插入深度对应不同的基坑坑外水位,结合周边具体环境条件,提出本项目合理止水帷幕长度,为基坑降水设计提供数据支撑。方案实施过程中,鉴于临近基坑已施工并启动降水井,为分析相邻基坑降水的叠加效应,建立了三维有限元分析模型,分析两个临近基坑同时降水对周边环境的影响,并与现场实测水位比较,结果较为吻合。此方法为基坑悬挂式止水帷幕设计提供了思路。

According to the similarity between seepage equation and heat conduction equation,ANSYS temperature field module is used to analyze seepage field and verify its reliability.Combined with a specific project of Nanjing Yangtze River floodplain,according to the ANSYS finite element simulation analysis,through calculating the water level outside the foundation pit corresponding to different insertion depths of the suspended water stop curtain,combined with the surrounding specific environmental conditions,the reasonable length of the water stop curtain of this project is proposed,which provides data support for the foundation pit dewatering design.During the implementation of the scheme,in view of the adjacent foundation pit has been constructed and the dewatering well has been started,in order to analyze the superposition effect of adjacent foundation pit dewatering,a three-dimensional finite element analysis model is established to analyze the impact of simultaneous dewatering of two adjacent foundation pits on the surrounding environment,and the results are more consistent with the field measured water level.This method provides ideas for the design of hanging water stop curtain in foundation pit.