The Application And Research Of Cement-soil Mixing Pile Wall Interposed By H Shape Steel In Jiayang Building Foundation Pit

Tri-axis agitation pile for cement-soil interposed with H shape steel for the containment of wall in foundation pit support and protection is widely applied in China. This method is simple in technology, strong in maneuverability, low in cost, short in construction period and has little contamination to the environment and also can bring great social and economic benefits. In recent years, it is applied more and more frequently in deep foundation pit, but in terms of its design and construction practice, it has been realized that the method is not mature enough, thus it is very necessary to make a theoretical and systematic study on its behavior. This paper introduces systematically the SMW technology.Combined with practices of Foundation pit support technology, it emphasize on the application of SMW technology to foundation pit support in those soft soil in Fujian area. Furthermore, according to the practical condition in construction of JiaYang Building in Fuzhou. by using MIDAS/GTS software, this paper makes numerical simulation analysis for the SMW pile in the construction period, and discusses the law of changes in it. Through the comparative analysis of the results from finite element calculation with original design and the practically observed data, we come to some valuable conclusions for the improvement and perfection of the design theory and calculation method of SMW technology. We should optimized the previous scheme, made structural design for selected and confirmed scheme, and then provided suggestion and requirements to the design of foundation pit support structure, so as to provide references.