Abstract:

Taking the water and sand gushing that happened in the construction of PDK34+570 heading of Xiushan tunnel onYuxiMengzi section of newly constructed KunmingHekou railway as an example, the authors discuss the ways to ensure safe tunnel construction in complex strata with water and sand gushing. The study shows that the combination of ground consolidation technology including groutstopping wall, grouting and pipe roof; advance geology predication and monitoring and measurement is a good solution.