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随着现代城市发展速度的加快,对高层和地下建筑的需求日益增加,深基坑工程的应用也越来越广泛,如何在保证安全的同时取得较好的经济效益,还需进行深入的研究与分析。以北京四季青自来水抢险中心深基坑工程为背景,通过理论分析、实验研究、数值模拟相结合的方法对深基坑开挖过程中基坑的变形进行研究,通过对FLAC3D数值模拟结果进行分析得出:随着基坑开挖深度的增加,土体及支护结构变形逐渐增大;锚杆对支护结构稳定性有积极作用;基坑第三步开挖时,基坑变形达到最大,在施工时应予以重视。
With the acceleration of the development of modern cities, the demand for high-rise buildings and underground structures is increasing day by day. The application of deep foundation pit projects is also becoming more and more widespread. How to achieve better economic benefits while ensuring safety, further research is needed and analyse. Based on the deep excavation project of Beijing Sijiqing Water Supply Emergency Center, the deformation of foundation pit during excavation of deep foundation pit was studied by theoretical analysis, experimental study and numerical simulation. The numerical simulation results of FLAC3D The results show that with the increase of excavation depth, the deformation of soil mass and support structure increases gradually, and the stability of bolt-support structure has a positive effect. When the excavation of the third excavation, the deformation of excavation reaches the maximum , Should pay attention to in construction.