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一、概述 灰峪隧道是一座岩质隧道,全长3,454.75米,位于2‰下坡及半径为1,000及700米的曲线上。整个隧道主要穿过石灰系砂页岩煤系地层。根据施工开挖获悉,石灰岩中多含裂隙水,沿裂缝流出。该隧道于1978年竣工,竣工后的隧道衬砌,除有8段790.4延长米以喷混凝土作永久支护外,其余各部为模注混凝土衬
I. Overview The Gray Valley Tunnel is a rock tunnel with a total length of 3,454.75 meters, lying on a 2 ‰ downhill and a radius of 1,000 and 700 meters. The whole tunnel mainly crosses limestone shale coal series strata. According to the excavation was informed that limestone in the fissure water, along the cracks outflow. The tunnel was completed in 1978, after the completion of the tunnel lining, in addition to the 8 section of 790.4 extension of the continuous injection of concrete to make a temporary support, the other ministries for the injection of concrete lining