A post-cast waterproof structure system and construction method for box culvert jacking

Abstract

The invention discloses a box culvert jacking post-cast strip waterproof structure system and a construction method, and relates to the technical field of road construction. The system is characterized in that outward-protruding longitudinal steel bars are reserved at the longitudinal end face of a rectangular box culvert; a U-shaped groove is formed in the exterior of the end face of the rectangular box culvert, and an interval is reserved between the U-shaped groove and the rectangular box culvert; a post-cast strip is arranged in the interval, a construction joint is arranged between the post-cast strip and the rectangular box culvert, the longitudinal steel bars run through the construction joint and embedded into the post-cast strip, an expansion joint is arranged between the post-cast strip and the U-shaped groove, and a first embedded type water stop belt is arranged in the expansion joint; the first embedded type water stop belt longitudinally runs through the expansion joint,the two sides of the first embedded type water stop belt stretch into the post-cast strip and the U-shaped groove respectively, a waterproof material is arranged on the outer surface of the expansionjoint, waterproof layers are laid on the outer surfaces of the U-shaped groove, the expansion joint and the post-cast strip, and the waterproof layers are arranged outside the waterproof material. Itis ensured that the first embedded type water stop belt is tightly combined with the U-shaped groove and the post-cast strip, the waterproof material and the waterproof layers are arranged on the outer surface of the expansion joint, and the better waterproof effect is achieved.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a box culvert jacking post-pouring belt waterproof structure system and a construction method. Background technique [0002] With the rapid development of urban traffic, more and more new roads need to pass through existing railways or highways. Using the box culvert jacking construction method to pass through existing lines can reduce disturbance to existing lines without interrupting existing lines. Line operation, and easy to control the deformation of existing lines, so it has been vigorously promoted in actual construction. After the box culvert is jacked, the box culvert is connected with the U-shaped groove poured on site through expansion joints, and a mid-buried waterstop is provided in the expansion joint. However, since the box culvert is prefabricated, the mid-buried waterstop in the expansion joint The connection between the type waterstop and the box culv...

AI Technical Summary

Problems solved by technology

After the box culvert is jacked, the box culvert is connected with the U-shaped groove poured on site through expansion joints, and a mid-buried waterstop is provided in the expansion joints. However, since the box culvert is prefabricated, the mid-buried The connection between the waterstop and the box culvert is not tight, resulting in difficulty in waterproofing. Therefore, there is an urgent need for a waterproof structure system and construction method with a tight connection at the junction of the jacking box culvert and the U-shaped groove.

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