宜万铁路野三关隧道施工期岩溶灾害危险性分析与安全对策研究

铁路施工过程中突水等岩溶灾害给施工带来了极大的危险性,野三关隧道岩溶突水灾害的防治与安全对策是施工企业面临的重大问题。笔者以现场调查为基础,提出岩溶突水灾害的类型,隧道施工岩溶灾害危险地段的划分原则和岩溶灾害危险性分级;结合地质条件分析和岩溶形成条件分析,研究了宜万铁路野三关隧道施工期岩溶灾害危险段的具体分布位置;探讨了施工中防治岩溶突水灾害的对策,为隧道安全施工提供了技术保证。

Risk Analysis of Karst Disaster during Constructing Yesanguan Tunnel of Yiwan Railway and Study on Its Countermeasures

Karst disaster like water burst occurred during railway construction would cause tremendous risk on construction period. How to prevent the water burst in Yesanguan karst tunnel and what countermeasures should be taken become the key problems faced by construction enterprise. The category of water burst in karst, dividing principle for dangerous section of karst disaster during tunnel construction and the risk gradation of karst disasters are put forward based on field investigation. Combining with geological condition analysis and the analysis of karst formation, the location distribution of dangerous sections of karst disaster during constructing Yesanguan tunnel of Yiwan railway is studied. Countermeasures for preventing karst water burst are probed into so as to provide technical support for construction safety of the tunnel.