木寨岭隧道全长19060 m,为极高风险双洞单线分离式特长隧道。隧道洞身穿过高地应力区,极易变形。其岩土成份主要是黏质黄土、砂质黄土、板岩、炭质岩、泥岩、断层压碎层等,洞身穿越的炭质板岩及炭质页岩区,占全隧道的46.53%,是兰渝铁路重点控制工程。木寨岭隧道 Muzhaoling tunnel length of 19060 m, is a very high risk double-hole single-lane separation tunnel. Tunnel hole through the high stress area, easily deformed. The geotechnical composition is mainly composed of clay loess, sandy loess, slate, carbonaceous rock, mudstone, fault crushed layer, etc. The carbonaceous slate and carbonaceous shale that the cave traverses account for 46.53% of the total tunnel, , Is the key control project of Lanzhou-Chongqing Railway. Muzhai Ridge tunnel