Abstract:

In order to fulfill rapid and continuous construction of tunnels in hard rock mass, the situations of caveins in Houyuntaishan tunnel on harbor highway in Lianyungang is analyzed, the types of caveins in tunnels in hard rock mass is discussed and structure plane stability control methods and major causes for the caveins are presented. Conclusion is drawn that caveins in tunnels in hard rack mass can be predicted and can be minimized by adopting structural plane stability control methods, advance geology forecasting methods and effective rock mass reinforcement.

Key words: tunnel, cavein, hard rock mass, stabilitycontrolling structural plane, cavein prediction, geology forecasting, rock mass reinforcement