泉域富水地层复杂管线条件下盾构机车站中板水下接收施工技术研究

Study on the Construction Technology of Underwater Receiving in the Middle Plate of Shield Locomotive Station under Complex Pipeline Conditions of Water-rich Formation in Spring Area

本文结合济南富水泉域地区及复杂的管线条件,就如何解决轨道交通盾构机接收安全问题提供解决思路。济南地铁R1线大杨站南端头盾构接收前,洞门水平探孔发现水量极大,接收区管线复杂,无地面加固条件。采用水下接收确保施工安全。既有车站中板完成水中接收,须对既有结构进行改造,增加水下接收挡水围堰、接收围堰防水、接收中板支撑体系加固,确保接收中板提供盾构机机头自重、水源自重、接收托架及填充砂浆重力的要求,通过对有限元建模分析,确保盾构接收自重荷载及动荷载对车站结构损伤在安全控制范围内。

This paper provides a solution to the problem of receiving safety of shield machine for rail transit by combining with the complex pipeline conditions in the rich spring area of Jinan. Before receiving the shield machine at the south end of Dayang Station on Jinan Metro Line R1, the horizontal hole of the portal found that the water quantity was extremely large, the pipeline in the receiving area was complex, and there was no ground reinforcement condition. Adopt underwater receiving to ensure construction safety. In order to ensure that the receiving plate provides the shield machine head weight, water source weight, receiving bracket and filling mortar gravity, it is necessary to modify the existing structure, increase the underwater receiving water retaining cofferdam, receiving cofferdam waterproof,receiving plate support system reinforcement, to ensure the receiving plate to provide shield machine head weight, water weight, receiving bracket and filling mortar gravity requirements, Through the finite element modeling and analysis to ensure that the shield received deadweight load and dynamic load damage to the station structure within the safety control range.