组合支护体系在某复杂深基坑工程中的应用

Application of a combined support system in a deep and complex foundation pit project

广州市珠江新城某一深基坑支护工程采用"上部土钉墙+支护桩+内支撑+预应力锚索"的组合支护体系,监测结果表明基坑开挖变形小,对周边环境影响小。通过对比分析,支护桩深层位移计算结果与监测结果基本吻合。支护体系安全可靠,经济合理,为类似工程的设计和施工提供参考。

One deep foundation pit supporting project is located in Jujiang new town. The combined support system is used in this project, which is the system of soil nailing wall upper and piles of inner bracing &prestressed anchor structrue. And the effect is obvious. The monitoring results shows that deformation is smaller for the foundation pit excavation, and has less impact on the environment all around. The supporting system is safe, reliable, economical and reasonable, which is a reference for similar projects. According to the comparative analysis, the calculation of the supporting piles deep displacement are nearly consistent with the monitoring.