Underwater final two-way joint mounting mechanism for super-large-diameter GRP (glass reinforced plastic) pipeline

The utility model discloses an underwater final two-way joint mounting mechanism for a super-large-diameter GRP pipeline, and relates to the technical field of underwater special pipeline construction. Comprising an ultra-large-diameter GRP pipeline final two-way connector and installation mechanisms connected to the two ends of the final two-way connector, the inner diameter of the ultra-large-diameter GRP pipeline is 4 m, a joint between installed pipelines is not larger than 2 cm, and gaps between the final two-way connector and the installed pipelines on the two sides are 2 mm. The installation mechanism comprises hoops connected to the two ends of the final two-way connector, sleeves and a pushing jack used for pushing the sleeves, the sleeves are connected to the two ports of the final two-way connector in a contraction state, and the pushing jack is arranged between the hoops and the sleeves after the installation position of the final two-way connector is set. And the pushing direction faces the insta