Study On The Selection And Verification Of Deep Foundation Pit Support Project Of Urban Comprehensive Pipe Gallery

With the increasing tension of urban land,the development and utilization of underground space has become more important,and the requirements of deep foundation pit support projects are also becoming more stringent.Deep foundation pit support project is a highly comprehensive system project.The choice of support project scheme should take into account all aspects.Therefore,the support form of deep foundation pit should be determined comprehensively from the technology,safety,construction,environment and other aspects,so as to better guarantee the safety of deep foundation pit.Because the fuzzy level analysis method decomposes the research subjects according to certain rules,considers comprehensive factors and makes objective evaluation,it is often used to solve the decision-making problem of multi-goal and multi-standard.The selection of foundation pit engineering support method involves many influencing factors.Taking the deep foundation pit in S area S,the foundation pit support engineering scheme based on fuzzy level analysis method is preferred.First,we select the factors affecting the support form and the weights,establish the four-level evaluation system and give the optimal support scheme;Then,the deep foundation pit software is used to perform the support scheme The simulation test is obtained.Finally,the paper further tests the effectiveness and reliability of the support scheme.When the foundation pit excavation and support is completed,the soil force around the foundation pit has changed.By analyzing the stress of the foundation pit excavation and support,the study believes that the soil uniformity at the bottom of the foundation pit on site can be used as a supplementary basis to verify the safety of the foundation pit support.Urban rapid development promotes the deep foundation pit support diversity,so effectively determine the foundation pit support engineering scheme has certain research value,this paper from the scheme selection,scheme verification,monitoring data dimensions to verify the applicability of the selected support project scheme,in order to provide the selection of more useful reference.