Water seepage prevention device for shield tunnel

The utility model belongs to the field of tunnel engineering, and particularly relates to a shield tunnel water seepage prevention device which comprises a pipe piece body, a supporting plate, a fixing rod, a clamping block and a driving assembly. The supporting plates are located on the inner side of the duct piece body. Two sets of mounting holes are formed in the duct piece body, and by arranging a fixing rod, a supporting plate, a rubber pad, a supporting block, a rotating shaft, a worm gear, a worm, a shell and a fixing rope, during mounting, a worker fixes the supporting plate to the inner side of the duct piece body through the supporting block, the fixing rod, the worm, the worm gear and the fixing rope; the connecting position of the segment body can be reinforced through the supporting plate and the fixing rod, the overall fixing effect is improved, meanwhile, the rubber pad is attached to the segment body so that the connecting position of the segment body can be sealed, the overall waterproof effe