Steel truss-concrete composite girder bridge double-layer sma deck pavement system and construction method

Abstract

The invention relates to a steel truss-concrete composite girder bridge double-layer SMA bridge deck pavement system, including a steel truss bridge, a girder bridge pavement layer, a steel guardrail, a fixed reference suspension system and a contact spanning floating balance beam system; a steel truss The beam bridge pavement is set on the bridge, and the beam bridge pavement is cement concrete slab layer, waterproof adhesive layer, synchronous crushed stone seal layer and asphalt surface layer from bottom to top. A steel guardrail is installed on the top of the curb band, and a windshield is installed on the base of the guardrail; the asphalt surface layer is composed of an asphalt lower layer and an asphalt upper layer, and is a double-layer SMA bridge deck pavement structure; the cement The concrete slab is a prefabricated assembled structure. The beneficial effects of the present invention are: the synchronous crushed stone seal layer of the present invention adopts a fixed reference suspension system, which has high precision, is convenient to assemble and disassemble, and the components can be reused, effectively ensuring the construction quality of the seal layer.

Description

technical field [0001] The invention relates to a double-layer SMA deck pavement and a construction method of a steel truss-concrete composite girder bridge, which belongs to the field of bridge engineering and is suitable for double-layer SMA pavement construction, especially for the SMA pavement construction of a composite girder bridge. Background technique [0002] In recent years, with the development of my country's national economy, more and more steel beams and steel truss-concrete composite beams have been used in bridge construction. Compared with the steel structure, the steel truss-concrete composite girder bridge uses concrete panels, which reduces the amount of steel used, avoids the fatigue cracking of the steel deck under the action of vehicle loads, and is better than the all-steel girder bridge under live loads. The noise is small, so it is increasingly favored in bridge construction. [0003] The bridge deck pavement is an important part of the bridge str...

AI Technical Summary

Problems solved by technology

Through the research, it is found that the main reasons affecting the quality of bridge deck pavement are: unreasonable design of pavement layer structure, large particle size of mixture under pavement, prone to rutting, moving and other diseases; unreasonable choice of waterproof adhesive layer material, low shear resistance Insufficient strength, easy to cause diseases such as pavement layer shifting

SMA is an asphalt mixture that meets the requirements of the pavement layer. It has the advantages of excellent thermal stability, anti-skid, wear resistance, crack resistance and water tightness, and low construction requirements. However, how to improve the composite beam bridge The paving accuracy and quality of SMA in China still need to be studied

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