山岭隧道洞口浅层滑坡处治关键技术研究

受地形地质条件、工程经济以及勘察深度等因素的制约,山岭重丘区隧道不可避免地会受到各种不良地质灾害的影响.为解决隧道穿越洞口浅埋段滑坡体的施工安全问题,以乐业至百色高速公路永乐隧道工程为研究背景,针对其地形地质条件及滑坡体情况,结合洞内变形与滑坡体变形相互作用机理,对隧道穿越洞口浅埋段滑坡体施工关键技术进行研究,并针对性地提出"洞外加固处治+洞内严格控制沉降"的综合处治方案.实践结果表明,本隧道工程穿越洞口浅层滑坡体的施工过程安全顺利,采取的施工控制措施方案实施效果良好.

Research on Key Technology of Shallow Landslide Treatment at Tunnel Entrance in Mountainous Hilly Area

Restricted by topographical and geological conditions, engineering economy and investigation depth, the tunnels in mountainous hilly areas would inevitably be affected by various adverse geological disasters. To solve the construction safety problem that tunnel passing through the landslide mass in shallow buried part of tunnel entrance, taking the Yongle tunnel project of Leye-Baise Expressway for the research background, in view of its topographical and geological conditions and landslide condition, and combined with the interaction mechanism of tunnel deformation and landslide deformation, to study the key construction technology that tunnel passing through the landslide mass in shallow buried part of tunnel entrance, and raise the comprehensive treatment scheme of "reinforcement treatment outside the tunnel + strict control of settlement inside the tunnel". The practical result shows that the construction process of the tunnel crossing the shallow landslide mass at the entrance is safe and smooth, and the construction control measures adopted in tunnel engineering are effective.