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渝怀铁路歌乐山隧道,全长4050米,是全线的控制工程之一,由中铁十一局集团公司承建。该隧道工程水文地质异常复杂,集滑坡、岩溶、煤层、瓦斯、采空区、涌水等于一体,尤其是富水地段,岩溶十分发育,裂隙通透性好。地下水位高,水量大,最大涌水量达53000立方米/日,最高压力2.2兆帕。该隧道位于重庆近郊,隧道通过地区山上居住有6万余居民,200多家企事业单位,是重庆市长期以来严重缺水地区,为此,也被列为重庆市的重要生态环境保护区。
Yuhuai Railway Geleshan Tunnel, a total length of 4050 meters, is one of the full range of control projects, construction by the China Railway 11 Bureau Group Corporation. The hydrogeology of the tunnel project is extremely complicated. It integrates landslides, karsts, coal seams, gas, goafs and gushing water in one area, especially in the water-rich areas. Karst develops well and fractures have good permeability. High groundwater level, large amount of water, the maximum inflow of 53000 cubic meters / day, the maximum pressure of 2.2 MPa. The tunnel is located in the suburbs of Chongqing, the tunnel through the area there are more than 60,000 inhabitants living in the mountains, more than 200 enterprises and institutions, is a long period of severe water shortage in Chongqing area, therefore, has also been listed as an important ecological environment protection zone in Chongqing.