Deep Foundation Pit Single Fulcrum Bolt Supporting Piles Theoretical Calculation And Analysis

According to collapsible bess in Lanzhou area, the paper analyzes single-fulcrum-anchor supporting pile, and applies finite element program DESPE to calculate internal force and deformation of supporting pile, which is hoped to provided reference for future design and construction. In single-fulcrum-single-anchor supporting pile system, anchor, supporting pile and soil work jointly. In this paper, finite element method is adopted. Under the pit plane, soil action is looked as soil spring acted on pile body. On the pit plane, this paper uses Coulomb抯 earth pressure theory to calculate active soil pressure. At the same time, the fulcrum is considered as elastic node. Aiming to structure model used in this paper, action that anchor restraint pile body is obvious. After throwing on reinforce, both deformation and internal force diminish obviously, moreover, the maximal moment node moves up. So section of supporting pile diminish, reinforcing steel bar demanded in supporting piles diminish, this not only assure security of supporting piles but also economize fund. By analyzing, the method adopted and the program is feasible in this paper, which plays an important role in design field.