竖向小净距隧道施工安全技术研究

Research on Tunnels Construction Safety Technology of Vertical Small Spacing

在隧道修建工程中,设置泄水洞的一个目的是有效地减小隧道断层段落的富水压力,降低正洞带水作业的施工风险,同时揭露未开挖段的地质情况;另一个目的是防止隧道排水不畅引发冻害,影响运营安全。铁路单线隧道防寒泄水洞一般设置在隧道正下方,泄水洞与正洞在施工过程中相互影响,结合阿尔金山隧道进口泄水洞与正洞施工实例,进行了正洞与泄水洞竖向小净距隧道施工安全技术研究。

In the tunnel construction project,one of the purposes of setting up the water discharge tunnel is to effectively reduce the water rich pressure in the fault section of the tunnel,reduce the construction risk of the water operation in the main tunnel,and expose the geological conditions of the unexplored section;the other is to prevent the tunnel drainage from causing freeze damage and affecting the operation safety.The cold proof and drainage tunnel of railway single track tunnel is generally set under the tunnel,and the safety of the drainage tunnel and the main tunnel is affected by each other in the construction process.Combined with the construction examples of the outlet and the main tunnel of the arjinshan tunnel,the safety technology research on the construction of the vertical small clear distance tunnel between the main tunnel and the drainage tunnel is elaborated in detail.