密集建筑区域中深基坑全逆作法的设计与实践

Design & Practice of Deep Foundation Pit Constructed by Top-down Method in Dense-constructed Area

上海兴业银行大厦基坑周边建筑密集、管线众多,环境保护要求很高,文章详细介绍了该基坑工程的支护设计过程,包括全逆作法的总体设计方案、“两墙合一”的地下连续墙设计、水平支撑体系设计、竖向支承体系设计和坑内外加固设计;并对主要的监测结果作了分析。该基坑工程已顺利完成,设计方案的实施有效地保护了基坑周边的敏感环境。

The foundation pit of Shanghai Xingye Bank Building is surrounded with a lot of buildings. Protection of the surrounding environment is very strict as many underground utilities such as telephone, gas and drainage pipelines distributed around the excavated site. This paper introduces the design process of the foundation pit supporting in detail. The top-down method is adopted in the overall design scheme which includes the design of the diaphragm wall, the horizontal strutting system, the vertical propping system, and the reinforcement countermeasures both in and out the foundation pit. Further more, the main monitored results are also discussed. The successful accomplishment of the foundation pit has effectively protected the surrounding environment.