Study on Calculation Method of Drainage Pipe Tunnel Leakage Based on SWMM
The leakage prevention of lifting tunnel is an essential construction link of drainage pipe engineering,which plays an important role in the quality of drainage pipe engineering.Therefore,the method of leakage prevention of drainage pipe tunnel based on SWMM is proposed.The target function is established with the minimum overflow and the shortest water accumulation time,and the constraints are set,and the leakage prevention model of the lifting tunnel is established.SWMM is used to simulate the leakage of the lifting tunnel in different recurrence periods,which obtains the optimal leakage prevention scheme to realize the leakage prevention of the drainage tunnel based on SWMM.Through the actual case application,the water level drop in the closed water test after the lifting hole is only 0.05mm,and the permeability co-efficient of the lifting member does not exceed 0.3,which meets the requirements of relevant specifications and has good leakage prevention effect.
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