Stability Analysis Of Soil Nailing In A Deep Foundation Pit In Suzhou

With the rapid growth of China's economy,many cities have achieved rapid development.Due to the available land resources is limited in modern cities,the previous architectural design has been unable to meet the needs of people.For this reason,subway,high-rise,super-high-rise buildings and other projects have emerged.The increase in these projects means that deep foundation pit engineering will also be more and more.Deep foundation pit engineering has always been a difficult problem in construction engineering technology.It is also a complex geotechnical engineering problem.Its comprehensiveness and complexity will involve all aspects.So how to design a safe,reliable,technically feasible and economically reasonable deep foundation pit supporting scheme is an important subject that all engineers need to be faced with.Deep foundation pit engineering is a complex system engineering,which not only requires the cooperation of various departments such as engineering survey,design and construction,but also requires the support of many engineering technology theories.Due to the timeliness and diversity of the supporting structure and the change of the soil environment during the construction process,the simple theoretical design can not completely guarantee the safety of the foundation pit construction.The finite element numerical simulation method can simulate the construction workers more comprehensively,analyze the stress and displacement changes of the supporting structure and the surrounding soil.Taking the foundation pit project of Huihuaiyuan Community in Suzhou Prefecture as an example,the Midas/GTS finite element software is used to model the foundation pit support process,and the deformation of the retaining structure during the foundation pit excavation process is analyzed.Then verify the feasibility of the design plan,in order to provide useful help to the design and construction of similar foundation pit engineering.The main contents of this paper are as follows:1.Through the collection and collation data system,the characteristics of deep foundation pit engineering and the research status at home and abroad are summarized,and the mechanism and scope of soil nail support are summarized.2.This paper introduces the general situation and construction method of the Huihuaiyuan Community in Suzhou area,and monitors and analyzes the level and settlement displacement of the supporting structure.The results show that the construction of soil nailing has limited certainity on the level and settlement displacement of the foundation pit slope.3.The MIDAS/GTS finite element software was used to simulate the excavation and support process of the foundation pit,and the displacement and stress variation of the supporting structure during the construction process were obtained.The results show that the numerical simulation results are in good agreement with the engineering measured values.It verifies the rationality of the design of the support structure and the applicability of the soil nail support in the project.Figure 41 table 11 reference 54...