基于ANSYS的深基坑承压水降压对周边环境影响分析

随着城市地下空间开发朝着深层发展,深基坑工程成为城市建设中的重要课题。当基坑达到一定深度后,不可避免地遇到承压水层的突涌问题。其中悬挂式止水帷幕的基坑,对承压水层的处理通常要求按需降压,既要保证基坑抗突涌稳定,同时也要尽可能保证对坑外承压水层产生较小的影响,特别是对于周边环境复杂、保护等级较高的基坑。利用ANSYS 10.0通用有限元软件中的热分析模块模拟基坑工程中承压水降压的过程,再通过结构模块继承承压水层水头降深结果,将其转换为土层的初始应变,最后经过结构模块的计算分析,得出准确的土体位移结果。为深基坑工程承压水降压设计以及对周边环境影响分析提供了一种新方法。

Analysis on Impact of Confined Water Depressurization on Surrounding Environment Based on ANSYS

With the deeper development of urban underground space, deep foundation pit has been playing a more key role in urban construction. Threat of confined water inrushing is inevitable in those deep foundation pit reaching a certain depth. When designing dewatering confined water scheme with the help of suspended waterproof curtain, it is always a paradox that safety of foundation pit calls for confined water dewatering more while surrounding environment should be preserved in the opposite way, especially for those foundation pits in complicated surroundings. This paper simulates process of dewatering confined water in deep foundation pit with ANSYS 10.0 heat module, and then converts water head data to initial strain in ANSYS strcuture module, and finally carries out the accurate prediction of the land subsidence, which provides a new method of confined water dewatering design and predicting the corresponding impact on surrounding environment.