Steel-concrete combined beam wet joint corrosion prevention construction method and application

Abstract

The invention discloses a steel-concrete combined beam wet joint corrosion prevention construction method. The method is characterized by including three parts of prefabricated bridge deck slab and steel beam contact bottom face corrosion prevention, wet joint cast-in-place concrete corrosion prevention and wet joint concrete top corrosion prevention. By the adoption of the steel-concrete combinedbeam wet joint corrosion prevention construction method, the prefabricated bridge deck slab and steel beam contact bottom face corrosion prevention part uses high-elastic modulus corrosion preventionrubber strips and bottom face high-strength quick-solidifying epoxy corrosion prevention mortar and is characterized in that the high-elastic modulus rubber strips are stuck to the edges of an upperflange plate of a steel beam and the periphery of each shear pin in a wet joint and mainly achieve two effects that firstly, a corrosion channel through which an outer medium enters an interface froma contact joint of a prefabricated bridge deck slab and the steel beam is obstructed, and secondly, a pouring formwork is provided for the bottom face high-strength quick-solidifying epoxy mortar. Thesteel-concrete combined beam wet joint corrosion prevention construction method can be applied to wet joint corrosion prevention structural measures in the steel-concrete combined beam assembling construction process in coastal areas.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an anticorrosion construction method and application of wet joints of steel-concrete composite beams. Background technique [0002] In the assembly construction process of steel-concrete composite beams, the wet joint is the key to connect the assembled prefabricated bridge deck and the steel beam grid into a whole, and the shear studs at the interface of the wet joint are the key to transfer the interface shear force. An important component of the overall force of the two. However, the interface gap of the wet joint, the cracking of the concrete, and the lack of tightness between the old and new surfaces make the shear studs at the interface vulnerable to environmental corrosion. [0003] my country's "Code for Design of Steel-Concrete Composite Bridges GB50917-2013" clearly stipulates that "when the bridge deck uses prefabricated reinforced concrete bridge decks, me...

AI Technical Summary

Problems solved by technology

In a corrosive environment, it is the key to ensure the safety and durability of the structure to ensure that the shear nails are not corroded. However, the current method of only using general rubber strips to seal steel-concrete gaps cannot achieve the design effect. It has no anti-corrosion significance for concrete cracking in wet joints of composite beams and the contact surface of new and old concrete is not dense. In view of this, this paper The wet joint anti-corrosion method proposed by the invention is divided into three parts: the steel-concrete interface, the internal concrete and the top surface of the wet joint concrete, and protects the possible corrosion risk sections to ensure the durability and safety of the structure

Images