Water stopping device for concrete construction joint of pool wall of reorganization and expansion sewage treatment plant

The utility model discloses a water stopping device for a concrete construction joint of a pool wall of a reorganization and expansion sewage treatment plant. The water stopping device comprises a water-swelling water stopping strip, a pre-buried grouting pipe, an exposed grouting pipe, new concrete, polyurea coating and a protective layer. A groove is chiseled in the middle of the original concrete construction wall in the thickness direction, the groove penetrates through the construction joint, and the water swelling strip is arranged in the groove. The pre-embedded grouting pipe and the exposed grouting pipe are both arranged in new concrete and located on an original concrete construction wall; the polyurea coating is sprayed on the upstream face of the connection area of the new concrete and the original concrete construction wall, and the protective layer is sprayed on the polyurea coating; according to the utility model, the functional requirement of leakage at the new and old concrete construction jo