Segmented prestress laminated concrete bridge deck of dense longitudinal beam system and construction method thereof

Abstract

The invention discloses a segmented prestress laminated concrete bridge deck of a dense longitudinal beam system. The deck comprises a precast concrete bridge deck body (7), transverse beams (1) and longitudinal beams (2); the longitudinal beams (2) are arranged on the transverse beams (1) at certain intervals and supported on the transverse beams (1) to form a steel lattice system, and the precast concrete bridge deck body (7) is installed on all the steel lattice systems formed by the transverse beams (1) and the longitudinal beams (2); the precast concrete bridge deck body (7) is separatedfrom a main truss (3) and connected with the main truss (3) only through the transverse beams (1). The invention further discloses a construction method of the segmented prestress laminated concrete bridge deck of the dense longitudinal beam system. According to the bridge deck, the rigidity of the joint between the transverse beams and side trusses is reduced, a plate-truss separation form is adopted, the transverse beams with I-shaped cross sections are adopted as much as possible, the transmission of tie rod force and the prestress in the main truss is reduced, and the width of cracks of the concrete bridge deck is reduced accordingly.

Description

technical field [0001] The invention belongs to the technical field of concrete bridge slabs, and more specifically relates to a segmented prestressed laminated concrete bridge slab of dense longitudinal beam system and a construction method. Background technique [0002] Steel-concrete composite structure bridges have developed rapidly in the past 20 years. Due to their rational use of material characteristics and full use of their respective advantages, compared with pure steel structure bridges, it can greatly save steel, improve stiffness and bearing capacity, etc.; compared with traditional concrete bridges Compared with structural bridges, it can significantly reduce the structural height, improve spanning capacity, reduce self-weight, improve seismic performance, shorten construction period, etc., and has significant comprehensive advantages. Therefore, using steel-concrete composite beams to strengthen and transform existing reinforced concrete bridges can produce si...

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Problems solved by technology

[0004] 1. In the prior art, the steel-concrete composite bridge deck adopts the combination of slab and truss. In this way, the force of the main truss and the horizontal tension on the concrete bridge deck are relatively large, which is not conducive to the stability of the bridge deck structure.

[0005] 2. On a long-span non-thrust arch, the concrete deck, as a part of the tie rod, will bear a large horizontal tie rod tension, which makes it difficult to control the tensile stress of the concrete bridge deck along the bridge direction

[0006] 3. The traditional orthotropic steel bridge deck is prone to fatigue problems under the action of heavy-duty vehicles; the orthotropic steel bridge deck has the problem of pavement vulnerability and corrosion in marine environments; the orthotropic steel bridge deck of long-span bridges The wind resistance performance is worse than that of concrete bridge decks; it is difficult to control the welding residual stress and residual deformation of orthotropic steel bridge decks of long-span bridges, and requires high construction precision

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