复杂地质条件下深基坑支护方案研究及稳定性分析

Research on Deep Foundation Pit Support Scheme and Stability Analysis under Complex Geological

淤泥质土自身抗剪强度较低、压缩性较高,给基坑工程支护结构稳定性带来了较大的影响。基于此,文中以实际工程为研究对象,深入分析了双排桩支护结构设计方案,研究了该支护结构稳定性。研究结果表明,该支护结构基坑整体稳定安全系数K_(s)=1.007,基坑侧壁位移、外侧桩身弯矩及剪力等均符合相关规范要求,说明双排桩支护结构能够满足淤泥质土等复杂地质条件下的基坑开挖需求。

The silty soil itself has low shear strength and high compressibility,which has a great impact on the stability of the supporting structure of foundation pit engineering.Based on this paper,this paper takes the actual engineering case as the research object,analyzes the design scheme of the double-row pile support structure,and studies the stability of the supporting structure.The results show that the overall stability safety factor of the foundation pit of the supporting structure is K_(s)=1.007,and the displacement of the side wall of the foundation pit,the bending moment and shear force of the outer pile body meet the requirements of the relevant specifications,indicating that the double-row pile support structure can meet the excavation requirements of the foundation pit under complex geological conditions such as silty soil.