缓倾岩层隧道变形机理及支护手段研究

Research on Deformation Mechanism and Supporting Measurements of Tunnels in Gently Inclined Stratum

缓倾岩层的存在为山岭隧道安全施工带来隐患,由于对缓倾岩层隧道开挖后的变形机理及支护手段研究较少,依托包茂高速湖南段某隧道,通过有限元数值模拟分析,对缓倾岩层的倾角和厚度影响效果进行探究,揭示缓倾岩层隧道开挖变形机理。同时探究锚杆对缓倾岩层变形的控制效果,提出可用于缓倾岩层施工的控制技术。

Gently-inclined rock strata bring hidden dangers to the construction safety of mountain tunnel.However,there are relatively few researches on the deformation mechanism and supporting means of gently-inclined rock stratum tunnels after excavation.Based on a tunnel of the Baotou-Maoming Expressway in the section of Hunan province,a numerical simulation was adopted to explore the influence of inclination angle and the thickness of gently-inclined rock strata and to reveal the deformation mechanism of gently-inclined rock stratum tunnel excavation.Meanwhile,the control effect of anchor bolt on the deformation of gently-inclined rock strata is studied,and a control technology applicable to the construction of gently-inclined rock strata is proposed.