A construction method of an integrated underwater cap flexible water-stop structure

Abstract

The invention discloses a construction method for an integrated underwater cap flexible water-stop structure. The water-stop structure includes a pile foundation casing and a prefabricated cap casing. The prefabricated cap casing is set on the pile foundation casing. The top of the bottom plate is welded with a shear key through the embedded parts, and the bottom of the bottom plate is embedded with a capsule tray. The capsule tray is ring-shaped and arranged around the pile foundation casing. A ring-shaped groove is formed under the prefabricated platform cover box, and a water-tight capsule is arranged in the ring-shaped groove. The water-tight capsule is in the shape of a ring. Pressurized gas or pressurized liquid, the inner and outer ring surfaces of the capsule are respectively attached to the outer wall of the pile foundation casing and the inner wall of the capsule tray, and form a vertical water-tight sealing belt. The invention has the advantages of simple structure and convenient installation. Through the setting of the capsule tray, the direct contact between the water-stop capsule and the concrete surface is avoided, and the water-free construction operation environment of the underwater cap is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of underwater bearing platform construction, in particular to a construction method of an integrated underwater bearing platform flexible water-stop structure. Background technique [0002] In bridge construction, the water-stopping technology of underwater cap construction is the core of the entire project construction, and the water-stopping effect directly affects the quality and durability of concrete pouring for the cap. The traditional water-stopping process includes: pouring a certain thickness of underwater concrete on the bottom of the box to achieve the water-stopping effect; using cement mortar, epoxy resin and other materials to stop leakage and water; pouring underwater non-segregated concrete around the steel casing to stop the water. water. The above water-stopping methods are all rigid water-stopping processes, which have the advantages of strong adaptability and mature technology. [0003]...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing flexible water-stop structures, rubber capsules need to be installed in the reserved grooves on the bottom plate of the prefabricated platform caps. High, if there are uneven surfaces such as honeycomb pitted surface and slight stepped surface on the finished concrete surface, it will seriously affect the fit between the capsule and the bottom plate of the prefabricated cap cover box, and then water seepage and leakage will occur, and even water stop will occur The failure will directly affect the subsequent construction process of the entire cap, and the water-stop capsule is easily scratched by animals and plants with hard shells in the water or the outer wall of the capsule is damaged by foreign objects such as welding slag remaining on the pile foundation casing that has not been cleaned. In turn, the outer wall of the capsule is damaged and the water-stopping effect is reduced.

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