地铁车站PBA工法施工重难点及控制措施

Key and Difficult Points and Control Measures of the PBA Construction Method in the Subway Station

暗挖洞桩法(Pile-Beam-Arch-method,PBA)适应性强、施工灵活、能有效控制施工引起的地表沉降,越来越多的被用于复杂环境地铁建设中。但是施工过程中也存在一些重难点,该文以沈阳三好街站为背景,对竖井横通道施工工艺进行了阐述,并针对自身风险源、管线沉降控制、管线改迁等项目施工重难点识别并提出相应的管控措施,从而实现项目施工全过程的安全管控。以保证施工安全进行。

The PBA construction method has strong adaptability and flexible construction,which can effectively control the surface settlement caused by construction,and it is increasingly used in the construction of subways with the complex environment.However,there are some key and difficult points in the process of construction.This paper takes the Sanhaojie Station in Shenyang as the background,expounds the construction technology of the cross passage of the shaft,identifies the key and difficult points of project construction such as their own risk sources,pipeline settlement control and pipeline relocation,and puts forward corresponding control measures,so as to realize the safety control of the whole process of project construction and ensure safe construction.