作　　者： (陈志平）; (黄学龙）;

机构地区： 广州市第一建筑工程有限公司,广州510060

出　　处： 《广州建筑》 2017年第4期9-14,共6页

摘　　要： 环形支撑充分利用混凝土的受压优势来平衡基坑支护系统所受的水土压力,其固有的无支撑面积大、立柱少、出土空间大等优点使得该支护形式在实际工程中得到了广泛的应用。本文以清远某三层地下室基坑工程项目为例,结合有限元软件Midas GTS对环形支撑的施工工序及其拆撑工序进行模拟,分析基坑支护结构的变形和受力情况及其周边环境的变化影响,并提出了基坑施工注意事项。其分析成果对优化设计和指导现场施工具有一定的参考意义。 Due to the inherent advantages of more free area without support, less columns and large exposed passage for excavated soil, annular support, which balances the water and soil pressure of the foundation support system by fully usage of the compression capacity of the concrete, is widely used in practical foundation excavation engineering. In this paper, with a three-floor basement excavation project as an example, the finite element software Midas GTS is employed to simulate the construction and demolition process of the annular support, which gives the deformation and stress distribution of the support structure and their influence on surrounding environment. The precautions for foundation construction are also proposed, which are of significant importance for optimized design and construction in-situ management.

关 键 词： 环撑 基坑变形 拆撑 施工工序