基于FLAC3D复杂地质条件下工作井开挖支护稳定性研究

Research on stability of excavation support of working well under complex geological conditions based on FLAC3D

工作井开挖深度大,直径宽,伴随着土体支护问题。以实际过程为例,分析深度8 m,直径7.5 m的工作井在开挖过程的稳定性。通过数值仿真软件FLAC3D模拟开挖过程,分析研究工作井坑顶水平位移、混凝土护壁沿工作井埋深的水平位移以及护壁周围的土抗力,并根据分析结果,给出工程上的建议,为类似工程提供参考。

Working well excavation depth is large,diameter is wide,accompanied by soil support problems.Taking the actual process as an example,this paper analyzes the stability of a working well with a depth of 8m and a diameter of 7.5m during excavation.Numerical simulation software FLAC3D was used to simulate the excavation process,and the horizontal displacement of the working pit top,the horizontal displacement of the concrete wall along the buried depth of the working well and the soil resistance around the wall were analyzed.Based on the analysis results,engineering suggestions were given to provide reference for similar projects.