广州南沙某项目深基坑组合支护结构有限元分析

Finite Element Analysis of Deep Foundation Pit Composite Support Structure for A Project in Nansha,Guangzhou

广州南沙某项目的深基坑采用了新型的砼芯类刚性大直径三重管(搅拌)旋喷桩+二道混凝土内支撑的组合支护结构体系。为探究该新型结构体系中钢筋混凝土加劲桩、大直径三重管(搅拌)旋喷桩及压顶板在不同工况条件下的相互作用效果,运用三维有限元分析方法,对支护体系的稳定性(主要包括位移、内力)进行数值模拟仿真分析,为保障施工安全提供数据支持。

The deep foundation pit of a certain project in Nansha,Guangzhou adopts a new type of concrete core type rigid large diameter triple tube(mixing)rotary jet grouting pile+two layers of concrete internal support composite support structure system.In order to explore the interaction effects of reinforced concrete reinforced piles,large diameter triple tube(mixing)rotary jet grouting piles,and pressure top plates in the new structural system under different working conditions,a three-dimensional finite element analysis method was used to numerically simulate and analyze the stability of the support system(mainly including displacement and internal force),providing data support for ensuring construction safety and providing reference for the design and construction of deep foundation pitsin the region.