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一、概况长林线枫叶岭隧道全长2300米。洞身穿过岩层:岭东为奥陶系石灰岩,呈次坚石状态;岭西为寒武系石灰岩夹页岩,呈松石状态。全部用140号混凝土带仰拱封闭式衬砌。该隧道系五十年代由隧道工程公司施工,1957年交付运营后,因漏水严重,曾在衬砌背后采用封闭压浆,共压注水泥3000余吨,未见收效,尤其是300～339.5米一段,漏水严重,洞内流量达
First, an overview of Longlin line Maple Ridge tunnel length of 2300 meters. Cave through the rock formation: the East Ridge for the Ordovician limestone, was Kennedy state; Lingxi Cambrian limestone shale, was turquoise state. All with 140 concrete with inverted arch lining. The tunnel was constructed by the tunnel engineering company in the 1950s. After the operation was delivered in 1957, the tunnel was closed with pressure grouting because of serious water leakage. A total of over 3,000 tons of cement was injected, with no effect, especially 300 to 339.5 meters , Serious water leakage, the flow of up to the hole