Deep Excavation Deformation And Stability Of Numerical Simulation

In this paper, based on the analysis of the summary of existing research results athome and abroad deep foundation pit support engineering, taking Shijiazhuang Huaidivillage deep excavation engineering as an example, according to the process of researchmethods and technical route, the first application is Lizheng deep foundation softwarefor the pit supporting design. On this basis, carry on pit excavation construction andmonitoring.Then on the basis of Lizheng deep excavation software design, usingFLAC3D software to build three-dimensional numerical model of the excavation wassimulated. Finally, the design values, simulation and monitoring values are compared toobtain the following key findings:(1) On the basis of analysis of the venue of project overview and engineeringgeological conditions, application Lizheng deep foundation software pit supportingdesign in the deep foundation I., get the internal forces and displacements of thesupporting structure, the settlement of the foundation pit, soil pressure distribution, andpiles and anchor reinforcement,etc. According to the results of the design calculations,foundation pit excavation and support. In accordance with the specificationrequirements of the arrangement of horizontal displacement and settlement monitoringpoints, and anchor axial force to be monitored. Deep foundation pit horizontaldisplacement and settlement monitoring values and anchor axial force monitoringvalues and design values are able to meet the requirements of the deformation of thedeep foundation, the design of the supporting structure is reasonable and feasible.(2) Using FLAC3D create a three-dimensional model of the deep foundation pitexcavation and support process simulation analysis. Get the deep foundation horizontaldisplacement, settlement, vertical stress and supporting structure internal forcedistribution and variation.(3) Comparing the horizontal displacement, settlement and supporting structuremasterpiece of FLAC3D simulation, Lizheng deep foundation software design and sitetesting, the three comparison results are basically the same, that the excavationengineering instance program design rationality, numerical simulation analysis iscorrect. FLAC3D numerical simulation software can be reasonable for deep excavationsoftware design based on better step excavation support deep foundation engineeringsimulation, to reflect the stress of the pile anchor retaining the pit during excavation anddeformation characteristics, which provide guidance for the design and construction ofdeep foundation pit support technology, and in-depth understanding of the mechanismof pile-anchor supporting role, prior assessment of the excavation engineering in orderto reduce construction the risk of an accident. Similar deep foundation also has areference value.