TECHNOLOGY OF TREATMENT FOR KARST ENCOUNTERED IN TUNNEL CONSTRUCTION

Karst is a geological phenomenon that is usually encountered in tunnel construction. It could lead to water spraying and mud flowing from excavation face and deformation, cracking and collapse of ground and lining. Therefore, it will affect the construction speed, jeopardize the safety of construction and spoil the environment. In this paper, the principle of treatment for the karst is presented and the methods of dealing with the karst are discussed for different type of karst. Moreover, the construction practice is introduced.