复杂环境条件下深基坑组合支护设计应用研究

Research on the application of combined support design for deep foundation pits under complex environmental conditions

城市建设工程过程中,复杂环境条件下深基坑支护控制变形要求较高。以贵州省冶金研究所及周边地块棚户区改造(新秀城)项目D1-E-E1段深基坑工程为例,采用钻探、现场抗剪试验、室内岩土测试、现场调查等综合手段,获取复杂环境条件下深基坑支护相关参数,基于midas GTS NX等软件进行数值模拟分析,进行组合支护设计。通过实施过程中监测数据分析结果看,复杂环境条件下深基坑采用桩锚、内支撑组合支护设计,能够有效控制深基坑位移,确保支护结构体系运行安全,达到基坑支护设计的目的。对于类似复杂环境条件下深基坑支护可借鉴该种组合支护设计。

In the course of urban construction projects,the requirements for controlling deformation in deep foundation pits under complex environmental conditions are high.Taking the D1-E-E1 section deep foundation pit project of Guizhou Metallurgical Research Institute and the surrounding land shantytown reconstruction(Xinxiu City)project as an example,and adopts comprehensive means such as drilling,on-site shear test,indoor Geotechnical testing and site investigation to obtain relevant parameters of deep foundation pit support under complex environmental conditions,and conduct numerical simulation analysis based on software such as midas GTS NX to carry out combined support design.Through the analysis of monitoring data during the implementation process,it can be seen that the combination of pile anchor and internal support support design for deep foundation pits under complex environmental conditions can effectively control the displacement of deep foundation pits,ensure the safety of the operation of the support structure system and achieve the purpose of foundation pit support design.This combined support design can be used for deep foundation supports in similar complex environmental conditions.