软弱围岩隧道斜井转正洞设计与施工技术

Soft Rock Tunnel Shaft Cut into Tunnel Design and Construction Technology

结合某隧道工程项目施工的具体情况,对隧道施工中涉及的斜井转正洞问题进行详细分析,并结合设计方案提出施工过程中需要注意的事项。该项目中,采用喇叭口形式的斜井转正洞方案可以使施工过程中由于交叉作业导致的安全隐患明显减少,同时,正洞初期支护时交叉口处对斜井产生的纵向推力可以利用断面的结构特点进行相应抵消,施工安全及效率均得到有效提升。

This paper combined with the specific circumstances of a tunnel project construction, the inclined hole positive problems in tunnel construction are analyzed, and combining with the design scheme put forward the need to pay attention in the construction process.In this project, the slope positive hole program bell form can make the security risks in the construction process due to cross operation resulted in an apparent decrease, at the same time, the vertical thrust is hole after excavation of the intersection of the slope can be offset by corresponding structural features of the cross-section of the construction safety and efficiency are effectively improved.