The Application Of SMW Method In The Foundation Pit Support In Taiyuan

With the rapid development of urbanization, the utility of the ground does not satisfy residents’ demand. Consequently,it is a trend to develop the underground in urban area.However,this development results in a series of problems in foundation pit engineering,With the solution of these problems, the pit engineering Technology has been greatly promoted.In this paper, the main supporting form of the foundation pit is introduced systematically, and the characteristics and applicable conditions of various supporting forms are summarized.This paper introduces the development and characteristics of SMW method, and summarizes the research of this method. SMW method is a kind of composite supporting structure formed by steel and cement soil mixing pile. The steel is a linear elastic material,and cement soil is a kind of complex brittle material with complex mechanical properties.So, there is not a systematical design theory yet. In this paper, the calculation method of SMW method is studied from four aspects: the design of steel, the design of cement-soil mixing pile, the checking of stability, and the drawing and checking of steel.In this paper,a foundation pit project in Taiyuan City is taken as the research object,Using the commercial software to deep foundation pit,the support scheme is studied and checked out. On this basis, the monitoring scheme of the foundation pit project is designed.In this paper, the finite element analysis software ABAQUS is used to simulate the support of the project, The simulation results are compared with the field monitoring results.The results show that the numerical simulation can effectively reflect the actual situation of the project, the relevant data have a high degree of consistency. The influence of the factors such as the layout of the steel in the SMW support structure, the depth of the embedding, the prestressing level of the anchor cable and the additional load on the foundation pit are discussed, which can provide a useful reference for the design of similar projects in the future.