通过发生在羊角脑隧道施工过程中的地表塌陷及岩溶突水事故,通过微分电测、探地雷达探测与钻探等手段,详细研究了事故发生地段的工程地质情况,分析了该隧道岩溶的发育、赋存、出露以及规模等特征,提出地形地貌、岩溶溶蚀、上覆土压力以及地下水下降等是造成地表塌陷及岩溶突水发生的主要因素.并根据实际情况,建议结合超前地质预报,采用注浆处理、改进掘进措施并控制爆破作业工法等治理措施,对羊角脑隧道岩溶地质灾害进行了处治.%The reason of surface subsidence and krast water outburst of Yangjiaonao tunnel is analyzed carefully with a thorough geological and hydrogeological investigation.The development, occurrence and expose of Karsts above the tunnel are examined.The Karst disaster of Yangjiaonao tunnel is proposed to be triggered by the combined effect of the topography, Karst dissolution, overburden soil pressure and the fall of the water surface.Some effective measures, including grouting, the development of tunnelling and the proper control of mining are applied successfully to the Karst disaster of tunnelling.
展开▼
