基于变形控制的超大直径深基坑双圆环支撑和高效开挖施工技术  

Construction Technology of Double-Ring Support for Super Large Diameter and Deep Foundation Pit and Efficient Excavation Based on Deformation Control

作　　者：尤雪春 

机构地区：[1]上海建工七建集团有限公司,上海200050

出　　处：《建筑施工》2014年第5期471-473,共3页Building Construction

基　　金：上海建工七建集团有限公司立项课题;编号为QJKJ14-3-2

摘　　要：深大基坑采用圆环支撑,一方面可以为基坑土方大开挖创造有利条件,但另一方面圆环支撑对基坑分块、对称、均衡开挖要求严格,变形控制难度大。结合天津陆家嘴广场基坑工程实际案例,着重介绍了在周边复杂环境与较高进度要求下,充分利用圆环支撑有利条件,以确保周边环境安全为前提,采取相应措施进一步提高基坑开挖效率。On one hand, the deep foundation pit with ring support can create favorable conditions for its large excavation, but on the other hand, ring support do have a strict demand on pit block, symmetry and balanced excavation, therefore, the deformation control is difficult. Taking the Tianjin Lujiazui Square Project excavation engineering as an example, the paper introduces how to make the full use of the favorable benefits of the ring support under the conditions of the complicated environment and the strict progress requirement, to improve the efficiency of excavation by proper measures under the premise of the safety of the surrounding environment.

关 键 词：双圆环支撑 复杂环境 变形控制 高效开挖 施工技术 

分 类 号：TU753.1[建筑科学—建筑技术科学]