超前支护结构结合退跨放坡施工技术在复杂基坑工程中的应用

The application of Advance Timbering Structure combined with Back Across the Slope technology in the complex foundation pit engineering

结合工程实际,对超前支护结构结合退跨放坡施工技术包括原理、施工难点、关键技术和效果进行了研究。结果表明,超前支护结构结合退跨放坡技术克服了施工场地狭窄、周边环境复杂、周围城市综合管网较多等基坑安全施工难题,对复杂基坑工程中局部特殊支护有:周边环境破坏小,加快施工总进度,工程成本较低,施工作业安全等优点;与常规的边坡支护相比,具有显著的社会效益和较好的经济效益。

Based on engineering practice, research is done into Advance Timbering Structure combined with Back Across the Slope technology, including its principle, construction difficulties, key technology and the efficiency. The result indicates, overcoming the difficulty of the narrow construction sites, the com- plicated surroundings, too many nearby urban synthesis pipelines and so on, the local special support based on the complex foundation pit is as follows： Ad- vance Timbering Structure combined with Back Across the Slope technology takes the advantages of little destruction done on the surroundings, speeding up the general construction process, lowing the cost of the project and the safety of construction work ; Compared with the conventional foundation excavation, it has both the obvious social benefit and better economical benefit as well.