Numerical Simulation on Sealing Performance of Pipe Jacking Hole Sealing Device

A simplified two-dimensional plane model was established by using ABAQUS software based on the curtain rubber plate + folding plate combined waterproof device commonly used in the pipe jacking construction site. By changing the parameters of the rubber plate, folding plate, and material hardness, the sealing law of the waterproof device was studied, and the sealing evaluation standard and optimal combination form were proposed. The research shows that the sealing device with the combination of curtain rubber plate and folding plate can effectively avoid the phenomenon of water and sand leakage at the hole. However, if the rubber plate is too long or the folding plate is too short, the effective contact stress of the end will be reduced. Too short a rubber plate or too long a folding plate will cause stress concentration at the end of the rubber plate, and the effective contact length is small. At the same time, too high hardness will also cause stress concentration at the end position and reduce the effective contact length. In these cases, the sealing performance will decrease.