富水砂层地下连续墙施工技术研究

Research on Underground Diaphragm Wall Construction Technology of Water-Rich Sand Layer

地下连续墙对于地铁施工中的防渗、防水、提高支护刚度都有很好的作用,因而广泛地被应用于地下工程。因富水砂层具有复杂性,若施工中的处理措施不得当、不及时,其施工风险就会很大,有时甚至会发生极为严重的事故,这直接关系到工程的成败。依托南通市地铁工程实践,以项目难点作为切入点,对富水砂层地质进行分析,并就泥浆比重、运距、敏感地区施工技术进行介绍,提出安全保障措施,以供类似工程施工参考。

The underground diaphragm wall plays a very good role in the construction of the subway to prevent seepage and waterproof,and improve the stiffness of the support,and is widely used in underground engineering.Because of the complexity of the water-rich sand layer or the improper or not timely treatment measures in the construction,the construction risk suddenly increase,which even directly affect the success or failure of the project.Based on the practice of Nantong subway project,this paper analyzes the geology of water-rich sand layer with the project difficulty as the entry point,and introduces the mud weight,transport distance and construction technology in sensitive areas,and puts forward safety guarantee measures for reference by similar projects.