Abstract:

The key of tunnel water proofing is the watertightness of reinforced concrete segment joint in shield tunnel, which can influence watertight effect and durability of tunnel. First, watertight seal is preliminary designed on the basis of theory and practice experience both at the home and abroad. Second, watertightness and assembly performance are tested by simulating the utmost segments installation deflection. According to the experiments, the dimension, structure and material of watertight seal are optimized. Finally, the best watertight seal design is confirmed. So the design optimization through watertightness and assembly performance tests is the main step in design procedure, which plays an important role on the watertightness of watertight seal and assembly quality of tunnel segments installation.