云南某高速公路隧道岩溶发育特点及其灾害治理实例

The development characteristics and hazard treatment of karst tunnel on one highway in Yunnan province China

岩溶隧道施工遭遇岩溶特别是充填(水、黏土)岩溶,极易发生涌突水、涌突泥灾并引发隧道冒顶、地表水源流失等地质灾害及地表生态环境破坏问题,轻则影响工期,重则对洞内施工人员和机械设备造成危害。研究岩溶隧道穿越位置岩溶发育及其充填性质,总结隧道施工岩溶灾害处理经验,无疑对今后西南岩溶隧道施工具有重要的指导意义。以云南某高速公路隧道为例,对季节变动带岩溶发育分布规律、岩溶灾害治理进行了初步探讨。

Karst tunnel construction is vulnerable from karst hazards of water bursting and mud bursting especially karst with(water or mud)filled,and some problems on geological hazards and ground surface ecological environment damage will happen such as water loss in the tunnel roof or ground surface,and so on.The range of hazards is from the little part of impacting construction duration to heavy damage to the cave construction personnel and machinery equipment.The study on the karst tunnel passing position,the development characteristics,the fill property,and the conclusion on hazard treatment experience during karst tunnel construction will have the instructive significance to south-west karst tunnel construction.This paper takes one highway in Yunnan province in China as example,makes a study on the distribution rules of karst development and karst hazard treatment affected by seasons changing in karst area.