罗家山隧道岩溶涌突水灾害危险性分析-《高速铁路技术》

文章信息/Info

Title:: Study on Risk Evaluation of Water and Mud Burst of Luojiashan Tunnel Karst

Author(s):: XU Sheng; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: Zhengzhou-Wanzhou high-speed railway|Luojiashan tunnel|water and mud burst|risk evaluation

摘要:: 罗家山隧道位于荆山山脉北端，隧址区可溶岩广泛分布，岩溶发育，水文地质条件复杂，施工中易产生岩溶涌突水灾害。文章通过对隧址区地质环境条件、可溶岩分布、可溶岩含水岩组及其富水性、岩溶水的赋存条件及其补给、径流和排泄特征等工程地质和水文地质条件分析，提出了隧道施工过程中可能出现的集中涌水段与突水点，在此基础上对隧道涌水的危险性进行分级研究和分级段落划分，得出罗家山隧道穿越低危险程度1段，中危险程度5段，高危险程度3段，无极高危险程度段落，对指导设计及施工具有重要意义。

Abstract:: Luojiashan tunnel is located at the north end of the Jingshan mountain, karst is widely distributed, with complicated hydrogeological conditions, easy to produce karst water inrush and mud burst disaster in construction. Based on the analysis of geological conditions of tunnel area, karst distribution and occurrence conditions of karst aquifer and water, karst water and recharge, runoff and discharge characteristics of engineering geological and hydrogeological conditions, the possible water burst section and water inrush danger point in the tunnel construction are put forward. On this basis, the risk of water gushing is studied and divided by classification and grading. The results are:Luojiashan tunnel passes through 1 segment with low degree of risk, 5 segments with medium degree of risk, 3 segments with high degree of risk, no segment with super-high degree of risk. It has important significance to guide the design and construction.