For some large foundation pit construction, the simulation before construction is essential which can better optimize the design. At the same time, it has very vital significance to monitor the deformation of deep foundation pit in the construction process and sort and analyze the monitoring results. Based on a deep foundation pit project, this paper researches the deformation regularity and influential factors of the foundation pit by the combination of the numerical simulation deformation values and measured deformation values and puts forward some ideas of using numerical simulation basis for optimizing the design of foundation pit.%目前对于一些大型的基坑施工，施工前的模拟是必不可少的，可以更好地对设计进行优化，同时，在施工过程中对基坑变形进行监测，并对监测的结果进行整理和分析，具有十分重要的意义。文章以某深基坑项目为背景，通过数值模拟变形值与现场实测变形值相结合的手段对基坑变形规律和影响因素进行探索，并提出用数值模拟进行基坑优化设计的思路。
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