Bearing Behaviors Of Lattice Shaped Diaphragm Wall As Founfation

Lattice shaped diaphragm wall as a new kind of foundation appears in recent years.It has been used in bridges in Japan.Most of them are used as the enclosure structure of foundation pit engineering,and a few of them are used in the bridge foundation and are single-chamber closed type,and there is almost no application in the civil construction.Given the study of multicellular lattice shaped diaphragm wall is deficient,this paper,by means of orthogonal tests to select model sizes,using ABAQUS finite element analysis software to establish nine chambers lattice shaped diaphragm wall three dimensional finite element model,researchs systemically its settlement,skin friction resistance and toe resistance under the same load,to provide the reference for the design and construction of it.The primary research content of this paper is as follows:(1)Nine chambers lattice shaped diaphragm wall is put forward as a new type of foundation applied in civil engineering.The construction process of diaphragm wall is introduced.(2)The orthogonal test of variable geometry stiffness is established based on the characteristics of the wall thickness,the depth of the inner wall and the distance of the wall.In virtue of the orthogonal table and the initial assumption to select the geometry of the model,ten three–dimensional nine chambers lattice shaped diaphragm wall foundation models are established.(3)The numerical analysis results of nine chambers lattice shaped diaphragm wall foundation settlement,skin friction resistance and toe resistance of the same wall thickness and the same inner wall depth and the same wall distance are compared in this paper.Based on the result curve,the development trend and distribution characteristics of settlement,skin friction resistance and toe resistance are obtained,and the vertical bearing characteristics of nine chambers lattice shaped diaphragm wall foundation are summarized.