圆梁山隧道岩溶突水机理及防治对策研究

采用现场调查、数值模拟与理论分析相结合的研究方法，对圆梁山隧道岩溶突水的机理及其防治技术进行了系统地研究，揭示了隧道岩溶突水是受水压、岩溶充填物与隧道围岩塑性区范围等影响的渐进破坏过程，总结了隧道岩溶突水机理，并针对圆梁山隧道揭示的溶洞情况，制定了岩溶突水的防治原则，实现了复杂岩溶条件下安全、高效的施工效果。

Study on karst waterburst mechanism and prevention countermeasures in Yuanliangshan tunnel

By means of investigation on the engineering geological conditions, numerical modeling, and theoretical analysis, the mechanism of the karst water burst and its prevention countermeasures in Yuanliangshan tunnel are researched systematically. The results show that the karst water burst in tunnels is a gradually developed process, which is influenced by water pressure, different filling materials and the plastic zones around the tunnel The mechanism of the karst water burst in tunnels is summarized; and in light of the karst conditions exposed in Yuanliangshan tunnel, the principles for preventing the karst waterburst are established. Thus, construction of tunnels under complex karst conditions with safety and high efficiency has been achieved.