Abstract:

 Xiangshan tunnel is the longest twin singletrack tube tunnel and the most import control work of the newlybuilt LongyanXiamen railway. Problems including numerous watergushing points, large volume of gushing water and great difficulty in waterproofing and drainage come up during the construction. By means of effective radial grouting for the excavated sections, the volume of the gushing water in the tunnel has been greatly reduced, which has in turn eased the water pumping and drainage work, reduced the construction cost, avoided ground surface settlement and restored the ground water level and the surrounding ecological environment. The radial grouting experience gained can provide reference for similar works in the future.

Key words:  , Xiangshan tunnelradial groutingwatersealingconstruction technology