Three-dimensional numerical analysis of deformation of various combined support forms

The complex environment around the foundation pit affects the selection of foundation pit support, and the excavation works become more complicated. Taking the foundation pit engineering of Central Hospital of Shengli Oil Field in Dongying as an example, the finite element analysis of pile anchor, double row pile, double row pile and inclined bracing combined support form is carried out by using MADIS GTS/NX three-dimensional finite element analysis software. The variation trend and stiffness variation of foundation pit displacement under different supporting forms are analyzed. The combined support form is a complicated support form. The result of finite element calculation shows that because of the different stiffness of the supporting structure, the stress concentration phenomenon and the structural displacement abrupt exist near the boundary of different support forms, but under the same support form, the displacement of soil mass increases with the distance of the distance to the corner of the foundation pit. As the length of foundation pit increases, the displacement of foundation pit has obvious spatial effect. (paper)