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以深圳某项目深基坑工程为背景分析了圆环内撑、格构式对撑+角撑的支护结构特点,最终选用了格构式对撑+角撑的桩撑支护结构。在深基坑工程中采用格构式对撑+角撑的支撑方式能较好的控制变形,还可以节省工程造价和工期。本文还进一步分析了该支护方式下支护桩的变形规律、支撑的受力情况,对支护体系的计算方法进行了探讨。
Based on the deep foundation pit project of a project in Shenzhen, the supporting characteristics of the inner brace and the lattice structure on the brace + gusset were analyzed. Finally, the piled brace supporting structure of the lattice brace + gusset was selected. In the deep foundation pit project using lattice support + gusset support can better control the deformation, but also can save the project cost and duration. In this paper, the deformation laws of supporting piles and the supporting forces are further analyzed. The calculation method of supporting system is also discussed.