Analysis and Evaluation of Geological Conditions of Bai-yangping Tunnel Engineering
Through geological investigation of the terrain,litholo-gy,geological structure,and hydrogeology of the Baiyangping Tun-nel site area,the engineering geological characteristics of the rock and soil,surrounding rock classification,and stability of the tunnel entrance were analyzed and evaluated.It was pointed out that there is a high possibility of hidden karst in the tunnel,and the karst caves exposed by excavation are prone to hazards such as water in-rush,mud inrush,and roof collapse.Tunnel excavation is prone to induce collapse of the entrance.Therefore,it is recommended to do a good job in advance geological forecasting,prepare work plans for various karst disasters,and adopt advanced support dur-ing construction at the tunnel entrance to facilitate tunnel forma-tion and slope stability.
tunnelengineering geologysurrounding rock classifi-cationhole stability
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