“两墙合一”深基坑工程设计与技术创新  

Design Technology Innovation of“Two Walls Integration”Diaphragm Walls in Deep Foundation Pits

作　　者：李伟[1] 李永东[1] Li Wei;Li Yongdong(BGI Engineering Consultants Ltd.,Beijing 100038,China)

机构地区：[1]北京市勘察设计研究院有限公司,北京100038

出　　处：《岩土工程技术》2024年第4期384-390,共7页Geotechnical Engineering Technique

摘　　要：北京CBD核心区某项目基坑深度36m,因受场地空间限制,采用“两墙合一”+内支撑支护体系,在实现基坑挡土、止水功能的同时完成了地下结构外墙施工。为提高工程质量和施工效率,针对地连墙与主体结构的连接、槽段接头处理方式、有限空间导墙结合近接建筑物预换撑等方面进行了技术创新,取得了较好的工程效果,可供类似工程参考。A project in Beijing CBD has a foundation pit depth of 36 meters.Due to space limitations,a“two walls integration”+internal support system was adopted to achieve the functions of retaining soil and water in the foundation pit,while completing the construction of the exterior wall of the underground structure.To improve the quality and construction efficiency of the project,technological innovations have been made in the connection between the ground connecting wall and the main structure,the treatment method of groove section joints,and the combination of limited space guide walls and pre-bracing of adjacent buildings.Good engineering results have been achieved,which can be used as a reference for similar projects.

关 键 词：两墙合一 预埋件连接 槽段接头处理 异形导墙兼预换撑结构 支撑兼做栈桥 

分 类 号：TU476[建筑科学—结构工程]