Double-layer SMA bridge deck pavement system of steel truss-concrete composite beam bridge and construction method

Abstract

The invention relates to a double-layer SMA bridge deck pavement system of a steel truss-concrete composite beam bridge. The double-layer SMA bridge deck pavement system comprises a steel truss bridge, a beam bridge pavement layer, steel guardrails, a fixed benchmark suspension system and a contact spanning type floating balance beam system. The beam bridge pavement layer is arranged on the steeltruss bridge, the beam bridge pavement layer sequentially comprises a cement concrete plate layer, a waterproof bonding layer, a synchronous gravel sealing layer and an asphalt surface layer from bottom to top, curb belts are arranged on the two sides of the beam bridge pavement layer, steel guardrails are installed at the tops of the curb belts, and wind shields are installed on guardrail bases.The asphalt surface layer is composed of an asphalt lower surface layer and an asphalt upper surface layer and is of a double-layer SMA bridge deck pavement structure. The cement concrete plate layeris of a prefabricated assembled structure. The system has the beneficial effects that the synchronous macadam seal adopts a fixed reference suspension system, the precision is high, the assembly and disassembly are convenient, components can be repeatedly used, and the seal construction quality is effectively ensured.

Description

technical field [0001] The invention relates to a double-layer SMA bridge deck pavement and a construction method for a steel truss-concrete composite girder bridge, belongs to the field of bridge engineering, is suitable for the double-layer SMA pavement construction, and is especially suitable 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, steel beams and steel truss-concrete composite beams have been used more and more in bridge construction. Compared with the steel structure, the steel truss-concrete composite girder bridge uses concrete panels to reduce the amount of steel used, avoiding the problem of fatigue cracking of the steel bridge deck under the action of vehicle loads, and it is more efficient than the all-steel girder bridge under the action of live loads. Therefore, it is increasingly favored in bridge construction. [0003] The bridge deck ...

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

Images