深大基坑中的环形-桁架支撑体系设计和应用

Design and Application of Ring-Truss Support System in Deep-Large Foundation Pit

环形-桁架支撑适用于基坑面积较大且平面近似为圆形或方形的工程。以实际工程为例,从支撑布置形式对比、圆环支撑的受力合理性、基坑开挖对周边环境影响以及施工中如何保证圆环支撑曲率等4个方面,介绍了大型环形-桁架支撑体系在深大基坑中的设计及施工。

The ring-truss support is suitable for projects where the area of the foundation pit is large and the plane is approximately circular or square. Taking the actual project as an example, the design and construction of the largescale ring-truss support system in deep foundation pits is introduced from four aspects, such as the comparison of the support layout style, the rationality of the force within the ring support, the influence of the foundation pit excavation on the surrounding environment and how to ensure the curvature of the ring support during construction.