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二郎山是由成都至康藏公路上的第一座大山隘卡。通过水文地质勘探、流量测并与脉冲试验等方法，查明了隧址区水文地质条件，取得了各含水层的水文地质参数，预计了隧道开挖时的总涌水量及其涌水量较大的地段。
Erlang Mountain is the first large mountain pass card from Chengdu to Kang-Tibet Highway. Through hydrogeological exploration, flow measurement and pulse test, the hydrogeological conditions in the tunnel area have been identified and the hydrogeological parameters of each aquifer have been obtained. It is estimated that the total water inflow and the influx of water in the tunnel excavation are larger The lot.