FLAC3D Simulation And Comparison Of Pile Anchor Support For Deep Foundation Pit In Handan

With the application of deep foundation pit in the construction industry more and more widely,the design of deep foundation pit support has become one of the common problems in the design and construction of high-rise buildings.The foundation pit is a complicated geotechnical engineering problems in many aspects,such as foundation pit environment,soil characteristics and mechanical parameters of rock and soil,soil and supporting structure interaction etc..This paper takes Handan foundation engineering as the research background,the process may occur in deep excavation,first used for foundation pit design and foundation design of Lizheng software,excavation and monitoring according to the construction plan,in addition to using FLAC3 D software for numerical simulation of foundation pit.The main contents are as follows:The main characteristics and deformation characteristics of the foundation pit engineering,the mechanism of the pile anchor supporting structure are analyzed.Combined with the actual site engineering data and geotechnical investigation data,we used Lizheng deep foundation pit supporting software on the design and calculation of 2-2 region to obtain the internal force and displacement of the retaining structure and the settlement of the foundation pit.According to the requirements of the project,collect the site monitoring data,this paper mainly monitoring the horizontal displacement of the foundation soil and surface settlement.Using FLAC3 D software to establish a three-dimensional numerical model to simulate the excavation of the soil during the horizontal displacement and surface settlement,and the analysis of these values.The design value,the monitoring value and the simulation value are compared and analyzed,and the results of the three methods are consistent.Therefore,the rationality of the design of pile anchor supporting scheme of deep foundation pit and the correctness of the numerical simulation model and parameter selection are explained.In addition,on the basis of the original scheme,the detail parameters of support structure are optimized.It provides an important reference value for the research and construction of deep foundation pit engineering.