以上海某超大型深基坑工程为背景,详细介绍了软土地区中心岛支撑方案的概况和施工工艺流程,并对实施过程中的关键节点和技术进行具体论述,为类似工程积累了宝贵的经验。该项目通过采用中心岛法的基坑支护方式,有效地利用了新建建筑结构作为基坑加固的一部分,降低了基坑加固成本,缩短了施工工期。并且由于整个加固施工过程均可视,使基坑支护结构安全处于受控状态,取得了良好的工程效益。 Taking a very large deep foundation pit project in Shanghai as the background, this paper introduces in detail the general situation and construction process of the center island support scheme in the soft soil area, and discusses the key nodes and technologies in the implementation process in detail, accumulating valuable experience. By adopting the foundation pit support method of the center island method, the project effectively utilizes the new building structure as a part of the foundation pit reinforcement, reduces the reinforcement cost of the foundation pit and shortens the construction period. And because the entire reinforcement construction process can be visualized, the safety of the foundation pit support structure is under control and a good engineering benefit has been achieved.