上海世博500 kV地下变电站超深基坑工程的设计、研究与实践  

Design,study and practice of deep cylindrical excavation of Shanghai World Expo 500 kV Underground Transmission Substation Project

作　　者：王卫东[1] 朱伟林[2] 陈峥[3] 翁其平[1] 吴江斌[1] 

机构地区：[1]华东建筑设计研究院有限公司,上海200002 [2]上海市电力公司电网建设公司,上海200000 [3]华东电力设计院,上海200063

出　　处：《岩土工程学报》2008年第S1期564-576,共13页Chinese Journal of Geotechnical Engineering

基　　金：上海市科委重点攻关项目(052112010);上海优秀学科带头人计划(07XD14206)

摘　　要：上海世博500kV地下变电站工程是国内首座全埋式大型变电站,位于上海市中心城区,是世博会的重要配套工程。该工程基坑直径为130m,开挖深度为34m,地基土软弱,给基坑工程的设计与实施带来了一系列技术难题:超深地下连续墙的设计与实施;圆形基坑的土压力与计算分析方法;深开挖对桩基承载性能的影响;超深基坑开挖对周边环境影响及控制。本工程基于全逆作法的总体设计方案,采用了支护结构与主体结构全面结合的先进设计理念及一系列创新性技术,成功实现了超深圆形基坑的设计与实施。上海500 kV地下变电站的成功实践,将为深层地下结构的建造提供经验,为相关理论研究工作的开展提供实例数据。The Shanghai 500 kV World Expo Underground Transmission Substation(SWEUTS) is the first underground terminal substation in China.Situated in the center district of Shanghai city,it is an important auxiliary project of the 2010 Shanghai World Expo.The SWEUTS involved the construction of a deep cylindrical excavation with a diameter of 130 m.The excavation depth for the project was 34 m and it was constructed under difficult soft soil condition.A series of problems were encountered in the design and construction of the project,including the design and construction of the deep diaphragm walls, earth pressure and analysis method of the cylindrical deep excavation,effects of deep excavation on the bearing capacities of piles,and impact of deep excavation on adjacent environment.The excavation was constructed by use of the top-down method. The adoption of the advanced concept of deep excavation supported by permanent structures and other innovative techniques ensured the successful construction of the project.Valuable design and construction experience of the SWEUTS can be used as reference for similar underground projects.The field monitored data have potential benefits for future theoretical research.

关 键 词：地下变电站 圆形基坑 逆作法 主体工程与支护结构相结合 铣槽机 一柱一桩 

分 类 号：TU753[建筑科学—建筑技术科学]