The Finite Element Analysis Of T Wall Cantilever Excavation Retaining Structure

The most of the underground continuous T wall retaining structure is applied to a morestrict with deformation and in the type of continuous wall which can not increases itsthickNess. And at present, there are designers using T wall and bolt joint use. But there arefew cases taking advantage of T wall stiffness in the form of cantilever excavationengineering. This paper carried out a series of discussion about the cantilever excavation offoundation pit in the sandy soil. The main research content is as follows:(1) In order to understand the characteristics of force and deformation of diaphragm wallReferencing a variety of documents about foundation pit excavation.And summaringpalisade structure types and conditions of using in cantilever excavation of foundation pit tomake contrast analysis with T wall cantilever excavation,though providing the realisticconditions for the application of the model T wall.(2) Introducing some basic methods of finite element calculation and constitutive modelof soil, and providing theory basis for finite element analysis.(3) In view of the problem of cantilever excavation in sandy soil, the three-dimensionalmodel was established based on MIDAS/GTS to analysis the relations on the deformation ofsoil outside the pit and deformation of T wall during the excavation process; Discussedstiffness ratio about T wall rib and groove section, the wall thickNess, the ratio aboutexcavation depth and width ratio, the effect of three dimensional space on the deformation ofthe influence. In the end, discussing the reasonable excavation depth and the reasonablelength in the soil layer.(4)comparing the result of MIDAS/GTS simulate, the measured data to Verify thecorrectness of the above results and the accuracy of the finite element...