Analysis Of Foundation Pit Support Considering Stability Of Nearly High Voltage Tower

In the complex environment,the deep foundation pit support construction faces the geotechnical problem,which has been a difficult problem in the construction construction,and many experts and scholars in the construction industry have studied it.This paper takes the Yao wan historic cultural block bar street in Xiangtan City in deep excavation engineering background,adopting the research method of calculation and numerical analysis of Lizheng combination,in the process of deformation and stability of high voltage tower of deep excavation adjacent to high voltage tower were analyzed,the main work and conclusions include:(1)In order to solve the stability of high voltage tower near the foundation pit,this paper adopts the analysis method of theoretical analysis and numerical analysis,summarizes the influencing factors of the stability of high voltage tower near foundation pit,mainly analyzes three factors: differential settlement,external load distribution,foundation scheme selection.(2)Introduced the general situation and problems of deep foundation pit support engineering.To ensure the stability of high voltage tower at the top of foundation pit,the design software is adopted to design scheme,and the support scheme is determined,which provides a feasible scheme for subsequent numerical simulation.(3)Combined with the established deep foundation pit support scheme,the numerical method is used to simulate the deep foundation pit excavation process.First,the finite element model of deep foundation pit excavation process is established,and the influence factors of the foundation stability of high voltage tower in excavation process are analyzed.Then combined with the construction process,the working condition is excavated and simulated,and the settlement value of the base of high voltage tower is calculated in every working condition.By changing the three factors of stepped excavation thickness,anchor prestress and embedded depth,the influence of these three factors on the stability of near-high voltage tower is summarized.Finally,through the inspection and comparison of the stability and structural internal force of the high voltage tower,the control index of foundation pit excavation and support is proposed,which provides a reference for later engineering problems.