岩溶隧道突涌水预警体系的建立

Establishment of Early-warning System for Water Inrush in Karst Tunnel

为加强岩溶隧道突涌水预警的准确性,基于理论分析方法及岩溶隧道实际特点,提出溶洞侵入及未侵入隧道两类情况下的岩溶隧道突涌水预警体系的建立方法。通过理论分析,确定了突涌水的主要影响因素及其发生过程中变化显著的监测项目。选择溶洞特质、水的变化、岩盘破损程度、节理裂隙形态为预警体系的主要评价指标。根据溶洞与隧道相对位置关系,建立溶洞侵入及未侵入隧道两种类型的突涌水预警体系。工程应用显示预警结果与现场吻合较好,验证了预警体系的合理性与可行性。

In order to enhance the accuracy of early warning of water inrush in karst tunnel,the early warning system is established under the conditions of cave invasion tunnel and non-invasion tunnel.In the process of establishment,theoretical analysis method and characteristics of karst tunnel are considered.Based on the theoretical analysis,the main influencing factors of water inrush in karst tunnel and the monitoring items with significant changes in the process of water inrush are determined.The main indexes of water inrush warning system are determined in early-warming system,which are based on the characteristics of karst cave,the change of water,damage degree of rock plate and characteristics of fissures.According to the relative position relationship between the cave and the tunnel,two types of water inrush warning models are established,which are cave intrusion tunnel and cave non-intrusion tunnel.The application shows that results of the system are in consistency of construction,which validates the rationality and feasibility of the method.