Active compaction device for elastic sealing pad for shield tunnel segment

The invention relates to an active compaction device for an elastic sealing pad for a shield tunnel segment. The active compaction device provided by the invention has the benefit that the ability of the elastic sealing pad for the shield tunnel segment to resist tunnel dislocation and opening is greatly improved, so that the waterproof requirements of tunnel engineering can still be met under various adverse conditions. The active compaction device comprises the elastic sealing pad mounted in a joint sealing groove; a steel kit protruding into the segment is embedded on the bottom surface of the joint sealing groove and is provided with a sinking groove extending in the length direction of the joint sealing groove and sinking cups arranged in the length direction of the sinking groove at intervals; a compression spring is arranged in each of the sinking cups, and the outer end of the compression spring acts on a convex pressing plate in the sinking groove. A bidirectional deformation component and a uniform