A normal-temperature health-preserving type steel bridge deck pavement structure and a construction method thereof

Abstract

The invention discloses a normal-temperature health-preserving type steel bridge deck pavement structure and a construction method thereof. The upper surface of a steel plate is provided with a shear-resistant stud that has a strip steel bottom plate; an epoxy resin macadam anti-shearing layer is arranged on the anti-shearing studs with the strip steel bottom plates; wherein a double-layer reinforcing mesh is arranged on the upper surface of the epoxy resin macadam shear-resistant layer, a wet joint interface agent layer and a normal-temperature health-preserving type ultrahigh-toughness cement concrete layer are arranged on the double-layer reinforcing mesh, and a resin macadam wearing layer is arranged on the upper surface of the normal-temperature health-preserving type ultrahigh-toughness cement concrete layer. The novel interlayer connection mode in which the shear-resistant studs with the marked line position pasted with the strip steel bottom plate are matched with the epoxy resin macadam shear-resistant layer is adopted to replace a traditional connection mode in which the shear-resistant studs are welded, so later maintenance is facilitated. The invention further providesa mixed proportion design and preparation method of the low-shrinkage, pumpable and normal-temperature health-preserving type ultrahigh-toughness cement concrete, the stress state of the steel bridgedeck can be improved under the cooperation of the stress absorption layer, and the occurrence probability of fatigue cracking of the steel bridge deck slab and pavement is reduced.

Description

technical field [0001] The invention relates to a steel bridge deck pavement structure and a construction method thereof, in particular to a normal-temperature health-preserving ultra-high toughness cement concrete steel bridge deck pavement structure and a construction method thereof. Background technique [0002] With the continuous increase of traffic volume and traffic load, the steel bridges constructed in the early stage in China faced the double test of fatigue cracking of orthotropic steel bridge deck and fatigue cracking of bridge deck pavement. In order to solve the problems of fatigue cracking of steel bridge deck and deck pavement at the same time, in recent years, the steel-UHPC composite deck structure proposed by domestic and foreign scholars has been widely used in reinforcement and maintenance projects of orthotropic steel bridge decks. The introduction of high-modulus UHPC has greatly improved the overall stiffness of the steel bridge deck pavement structur...

AI Technical Summary

Problems solved by technology

On the one hand, welding inevitably introduces initial defects such as pores and burrs, and generates residual stress, which adversely affects the static and fatigue properties of the studs; inconvenient

[0004] CN 108589518 A uses local shear bonds and epoxy bonding to replace the traditional interlayer connection method of densely distributed shear bonds. This interlayer connection method cannot meet the collaborative deformation requirements between the large flexibility steel bridge deck and the pavement

In addition, in order to reduce the cracks caused by UHPC deformation due to dry shrinkage, CN 108589518 A replaces the steel mesh in the traditional steel-UHPC composite bridge deck pavement by setting deformation joints, which not only brings great damage to the waterproof and rust resistance of the underlying steel structure. Great challenge, and greatly reduced driving comfort

[0005] CN 107237259 A Paste the shear stud connection assembly on the steel bridge deck cover plate through epoxy resin. This connection method avoids the fatigue details introduced by traditional welding shear studs, but the workload of the densely distributed shear stud connection assembly Larger, and not conducive to later maintenance and repair

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