高速公路隧道抗采动影响变形技术体系研究

Study on Technical System of Resistance to Mining Influence in Highway Tunnels

隧道是高速公路重要构筑物,当其通过煤矿井田上方时,将压覆大量的煤炭资源。压覆资源解放与隧道建设如何协调是亟待解决的问题。为此,从隧道衬砌结构形式、围岩等级以及设计参数开始分析隧道自身抗采动变形的能力,并从隧道初期支护、二次衬砌、仰拱和防水层材料入手考虑,建立隧道抗采动影响变形技术体系,通过采取一系列综合措施,达到隧道既安全运营又可实现安全采出压覆资源的目的。

A tunnel is an important structure of the highway. It will cover a great amount of coal resources when going above mining areas. It is in urgent need to harmonize between exploring the covered coal and construction of the tunnels. Accordingly,beginning with the study of the tunnel lining structure,the surrounding rock grade and the design parameter,the ability to resist the mining influence of tunnels themselves is analyzed. Besides,a technical system of resisting the mining influence in highway tunnels is provided based on the analysis of the tunnel initial support,the secondary lining,the inverted arch and water-proof layer materials. A series of measures are taken to ensure the operation safety of tunnels and exploring the covered coals.