采用滑降式预支撑体系的超深基坑受力变形特性研究

Research on Deformation Characteristics in Deep Foundation Pit with Sliding Type Rapid Pre-Support System

摘要: 随着城市地下空间持续开发，基坑变形及环境保护成为地下工程实施的重要控制内容。为应对深基坑无支撑暴露时间的变形，上海轨道交通市域线机场联络线华泾站4区西端头井基坑开挖过程中首次引入滑降式快速预支撑体系。本文依托上海轨道交通市域线机场联络线华泾站基坑，对引入深基坑滑降式快速预支撑体系的开挖应用效果与传统基坑开挖施工效果进行对比分析，以探讨深基坑滑降式快速预支撑体系的有效性，以期对该体系在后续类似工程中的应用提供借鉴作用。

Abstract: With the development of urban underground space, foundation pit deformation and environmental protection have become important control contents in the implementation of underground engineering. In order to cope with the deformation of unsupported exposure time of deep foundation pit, the sliding rapid pre-support system was introduced for the first time in the excavation of the foundation pit of the west end well in zone 4 of Huajing station of the airport connecting line of Shanghai rail transit. Based on Huajing station of the airport connecting line of Shanghai rail transit, this paper compares and analyzes the excavation application effect of the sliding rapid pre- support system of deep foundation pit with that of the traditional foundation pit excavation, so as to explore the effectiveness of the sliding rapid pre-support system of deep foundation pit, in order to provide a reference for the application of the system in subsequent similar projects.