Comprehensive Deep Foundation Pit Supporting Structure Of The Numerical Simulation Analysis And Optimization Design

Nearly three decades, in all areas of our country has entered a period of rapidgrowth, infrastructure even is a leader in China’s economic growth. Where high-risebuildings,become more and more, and as a prerequisite for the completion of thesebuildings is to provide a safe and stable foundation for the smooth conduct of itssuperstructure construction. Therefore, more and more scholars at home and abroadthrough theoretical analysis and engineering practice, made a number of theoreticalmodels and various support methods, and in practice summed up a lot of reliableexperimental data.However, due to deep excavation with uncertainty and complexity,and regional characteristics, there are many in this area to be studied and discussedissues that we need to constantly improve and develop. Therefore, the structure of deepfoundation pit and reasonable parameter design study is a valuable topic.In this thesis, a combination of Beijing Guanghua Metro617plots excavationworks for the Beijing area deep foundation engineering theory, field monitoring,foundation pit excavation simulation, pit deformation analysis and other aspects ofresearch work. The main contents include the following aspects:(1)Summed up the pile anchor and soil nailing structure and deformation of deepfoundation research situation at home and abroad, for which engineering analysismethods are described, made the field research issues yet to be resolved.(2)Soil conditions for the Beijing region and engineering characteristics, analyzeits deep excavation of the impact and the works with a comprehensive soil nails andpile-anchor supporting structure of the working mechanism and calculation methods arediscussed.(3)Use Lizheng7.0software for the design of the supporting structure calculations,while the basic theory of finite element, using the finite element software MIDS-GTSestablished soil nails-pile anchor supporting structure integrated three-dimensionalmodel, and compare the two find out the differences which gives optimization.(4)The Midas GTS (overall) calculation method and principle are7.0(algorithm)to compare the results, through the gap between the two, find out the optimization range, in order to simplify the optimization process.