Longitudinal pipeline sealing structure on airtight thermal insulation floor and construction method of longitudinal pipeline sealing structure

The invention belongs to the technical field of civil engineering, and relates to a longitudinal pipeline sealing structure on an airtight heat preservation floor slab and a construction method of the longitudinal pipeline sealing structure, the longitudinal pipeline sealing structure comprises a floor slab layer, a floor slab waterproof layer, a floor slab heat preservation layer and a longitudinal pipeline, the penetrating position of the longitudinal pipeline and the floor slab layer is filled with rock wool, the space between the longitudinal pipeline and the waterproof layer is filled with a foaming agent, anti-crack nets and anti-crack mortar are arranged at the two ends of the foaming agent, the two ends of the longitudinal pipeline are wrapped with heat preservation materials, and therefore all gaps between the longitudinal pipeline and the heat preservation floor slab are sealed. And therefore, the building sealing performance of the longitudinal pipeline penetrating through the heat preservation flo