某地铁站围护结构地下连续墙施工新技术

New Technologies of the Underground Diaphragm Wall Construction at A Certain Subway Station

本文结合广州地铁三号线同和站围护结构的地下连续墙现场施工实例,对地下连续墙槽段划分、成槽施工、接头处理等施工技术要点,以及对地下连续墙入岩段采用吊脚墙的支护方案优化、入硬岩预处理成槽施工新技术应用等进行了总结论述。该工程的地下连续墙施工中,其新技术与要点措施具有工效高、实用性强、操作简单等特点,为类似工程的现场施工提供了可贵的经验和借鉴。

Combined with the engineering example of construction technology on underground diaphragm wall at Tonghe Station of Guangzhou Metro Line 3, this paper summarizes technical points of the diaphragm wall groove segment dividing, trench construction and joint processing. The application and main points of new technology about pretreatment trench construction into the hard rock and the optimization scheme adopting hanging feet continuous wall at entering-rock section are also summarized in this paper. The new technologies of underground diaphragm wall are high efficiency, practical, simple operation. The results can provide valuable experience and reference for on-site construction of similar projects.