Abstract: : the karst is strongly developed in Dazhiping tunnel, where the hydrogeological condition and geological structure is complex, so the construction is difficult.
摘要：大支坪隧道岩溶发育强烈，水文地质条件和地质构造复杂，施工难度大。
Abstract: : the karst is strongly developed in Dazhiping tunnel, where the hydrogeological condition and geological structure is complex, so the construction is difficult.
摘要：大支坪隧道岩溶发育强烈，水文地质条件和地质构造复杂，施工难度大。
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