Web-covering-baseplate trapezoid (wave-shaped) steel plate combined box girder and construction method thereof

Abstract

The invention relates to a web-covering-base trapezoid (wave-shaped) steel plate combined box girder and a construction method thereof. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder comprises a box girder composite baseplate, a box girder composite structure top plate, trapezoid steel webs and a box girder partition plate. The box girder composite baseplate with a composite structure is formed by pouring epoxy asphalt concrete onto a trapezoid steel plate. The box girder composite structure top plate is a combined structure of a trapezoid steel plate beam and reinforced concrete. Before erection of the box girder, the trapezoid steel plate, the trapezoid steel plate beam and the trapezoid steel webs are welded or connected in other ways to form an integral structural system. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder and the construction method thereof have the advantages that longitudinal reinforcement binding and prestressing tendon pipeline laying of a prefabricated overall framework are completed, beam bodies or beam segment framework integral structures are hoisted and erected directly, and the reinforced concrete baseplate and the reinforced concrete top plate of the box girder are poured finally; baseplate concrete is flush with steel web flanges; the shape of a bridge is attractive, and construction is facilitated.

Description

technical field [0001] The invention relates to a trapezoidal (corrugated) steel plate composite box girder with an abdominal wrapping bottom and a construction method thereof, belonging to the field of bridge structures. Background technique [0002] In the design and construction of the traditional trapezoidal (corrugated) steel web box girder, holes are first drilled at the lower part of the trapezoidal (corrugated) steel web according to the spacing of the transverse reinforcement of the bottom plate, and then the concrete bottom plate reinforcement is perforated and connected to the steel web, and the steel web Inserting into the middle of the bottom slab concrete, the construction is complex and difficult to operate, it is completely manual operation, heavy workload, high labor intensity, it is difficult to combine the trapezoidal (corrugated) steel plate with concrete, especially the bottom slab concrete outside the lower part of the trapezoidal (corrugated) steel web ...

AI Technical Summary

Problems solved by technology

[0002] In the design and construction of the traditional trapezoidal (corrugated) steel web box girder, holes are first drilled at the lower part of the trapezoidal (corrugated) steel web according to the spacing of the transverse reinforcement of the bottom plate, and then the concrete bottom plate reinforcement is perforated and connected to the steel web, and the steel web Inserting into the middle of the bottom slab concrete, the construction is complex and difficult to operate, it is completely manual operation, heavy workload, high labor intensity, it is difficult to combine the trapezoidal (corrugated) steel plate with concrete, especially the bottom slab concrete outside the lower part of the trapezoidal (corrugated) steel web because it is in contact with the steel plate The different thermal expansion coefficients of the bridges are prone to crack gaps, rainwater leakage, corrosion of steel bars and steel plates, and affect the service life of the bridge; the box girders of the traditional trapezoidal (corrugated) steel web composite structure are all under the web, which is not only difficult to construct but also affects the appearance and quality. ; The traditional trapezoidal (corrugated) steel web composite structure box girder construction must set up cast-in-place supports and formwork on site, and use large-scale construction equipment and facilities such as hanging baskets. The amortization cost of the project is high; , Base plate reinforcement binding, prestressed pipe laying and positioning, formwork and other processes are all manual operations at high altitudes, with low construction efficiency and many safety hazards

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