Waterproof structure at outlet branch pipe position of comprehensive pipe gallery and waterproof construction method

The invention relates to a waterproof structure at an outlet branch pipe position of a comprehensive pipe gallery and a waterproof construction method. The waterproof structure comprises a threading pipe pre-buried between the comprehensive pipe gallery and an inspection well, and the two ends of the threading pipe are located in the comprehensive pipe gallery and the inspection well correspondingly; an elastic rubber plug is arranged at the end, located in the inspection well, of the threading pipe, and the elastic rubber plug is of a conical cylindrical structure; and a water receiving tank is arranged below the end, located in the comprehensive pipe gallery, of the threading pipe, a water conveying pipe is arranged at the bottom of the water receiving tank, and the lower end of the water conveying pipe is led into a drainage ditch. According to the waterproof structure at the outlet branch pipe position of the comprehensive pipe gallery and the waterproof construction method, the elastic rubber plug is arr