A kind of bridge deck pavement method

Abstract

The invention discloses a bridge deck pavement method. A stud with hooks is arranged on a pretreated steel-box-girder bridge deck steel plate, the height between each hook and the bridge deck steel plate is distributed in catenary form along a cross-bridge, a prestressed steel wire passes through the hook, and the both wings of the bridge deck steel plate are subjected to pre-tensioned prestress application by an anchoring device; the prestressed steel wire draws the bridge deck steel plate, so that the bridge deck steel plate is arched up in the center line, and then produces prestressed deformation; and autoclaving-free high-strength and high-tenacity concrete is cast on the bridge deck steel plate subjected to prestress application, and then a waterproof bond stress absorbing layer and a modified asphalt SMA are paved on the autoclaving-free high-strength and high-tenacity concrete. A prestress is applied to a bridge deck concrete layer through a prestressed steel wire and by using a pre-tensioning method, so that an extruding prestress is generated at the top of the concrete layer, thereby effectively solving the problem that the concrete layer paved on a steel-structured bridge deck easily has cracks above a stiffening rib of the steel plate, reducing bridge deck diseases, and prolonging the service life of a bridge deck pavement layer.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a method for improving the rigidity and durability of a steel bridge deck pavement combined structure. Background technique [0002] Steel decks have the advantages of light weight, convenient construction, and large spanning capacity, and are widely used in urban overpasses and large-scale bridges across rivers and seas. Among all kinds of steel bridge deck pavement schemes, the bonding performance between pavement layers has always been one of the worldwide problems that experts and scholars in this field are committed to solving. At present, a method with better application effect is to weld shear nails / shear plate + steel mesh + concrete + waterproof adhesive layer + surface layer SMA after the steel plate is laid with an antirust layer. The problem of poor bonding performance between pavement layers, but with the development of modern transportati...

AI Technical Summary

Problems solved by technology

At present, a method with better application effect is to weld shear nails / shear plate + steel mesh + concrete + waterproof adhesive layer + surface layer SMA after the steel plate is laid with an antirust layer. The problem of poor bonding performance between pavement layers, but with the development of modern transportation, more and more large-span and wide-width bridges appear in traffic construction, when this scheme is applied to these wide-width bridge projects The bridge deck is too flexible and the stiffness cannot meet the design requirements, which seriously affects the bearing capacity of the bridge deck pavement and poses a serious safety hazard

[0003] The above schemes mainly have the following problems when used on steel structure bridge decks: 1) Since the pavement schemes of shear nails / shear slabs+reinforced mesh+concrete+waterproof adhesive layer+surface layer SMA all have stiffeners on the steel plates, Under the dual effects of traffic load and high and low temperature load, the deformation of the steel plate at the non-stiffener is much larger than the deformation of the steel plate at the stiffener. When the steel structure-concrete layer is deformed as a whole, the stiffener Concentrated tensile stress tends to occur on the top of the concrete layer above, causing the concrete layer to crack along the direction of the stiffeners, forming transverse or longitudinal cracks; This puts forward higher requirements for the bearing capacity, stiffness and durability of the bridge deck pavement structure, and it is urgent to take effective measures to reduce the self-weight of the bridge deck pavement on the premise of improving the overall stiffness and durability of the bridge deck pavement structure ; 3) The concrete used in this scheme is high-toughness concrete, which improves the toughness of the concrete by adding toughening components in the concrete, so that the concrete will not crack when it deforms with the steel plate. To a certain extent, the concrete is effective It solves the problem of the durability of the concrete layer, but when it is applied to the deck pavement of long-span and wide-width steel bridges, the strength of the concrete cannot meet the design requirements, and currently more active powder is used in bridge deck pavement The strength of concrete meets the design requirements for the pavement of long-span and wide-width steel bridges, but its cost is high and the maintenance process is complicated, so it is not suitable for use in the pavement of long-span and wide-width steel bridges

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