Heating maintenance method for thin-walled concrete of steel-concrete composite bridge

Abstract

The invention discloses a heating maintenance method for thin-walled concrete of a steel-concrete composite bridge. The method comprises the following steps: spreading and fixing a plurality of carbonfiber heating wires on the upper surface of a steel bridge steel plate; pouring concrete on the upper surface of the steel bridge steel plate, and forming the thin-walled concrete after surface finishing; spreading a moisturizing layer on the thin-walled concrete; spreading a heat-preserving layer on the moisturizing layer; spreading cables on the outer side of the thin-walled concrete; and plugging plugs of the carbon fiber heating wires into plugs of the cables; and enabling the carbon fiber heating wires to work and generate heat. The method uses the carbon fiber heating wires to provide the heat source for maintenance of the concrete, and the carbon fiber heating wires are arranged between the steel bridge steel plate and the thin-walled concrete, so that the maintenance problem of the free surface of the bottom of the thin-walled concrete is well solved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for heating and curing thin-walled concrete of steel-concrete composite beams. Background technique [0002] With the rapid development of my country's basic engineering construction, many bridges in the form of "steel-concrete combined beams" have been designed and constructed in recent years. The improvement and innovation of construction technology in the construction process is the unanimous goal pursued by the builders. Under the strict requirements of the country and the industry on project quality, it is necessary to continuously explore new processes, new methods, and new tools in order to ensure the construction schedule. [0003] see figure 1 As shown, in the "steel-concrete composite beam", the prefabricated bridge deck 6 is laid on the steel girder steel plate 1, and a wet joint 7 is left between two adjacent prefabricated bridge decks 6, and the ...

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Problems solved by technology

[0003] see figure 1 As shown, in the "steel-concrete composite beam", the prefabricated bridge deck 6 is laid on the steel girder steel plate 1, and a wet joint 7 is left between two adjacent prefabricated bridge decks 6, and the wet joint 7 needs to be cast in place Thin-walled concrete 3, the bottom of thin-walled concrete 3 is the steel girder steel plate 1, the steel beam steel plate 1 is about 24mm thick, due to the better heat dissipation performance of the steel beam steel plate 1, the steel girder steel plate 1 cannot maintain the thickness of the thin-walled concrete 3 in winter The heat required for maintenance, and the lower surface of the steel girder plate 1 is the air-facing surface, and the directly below the air-facing surface is the existing business line of the railway, so it is not possible to use any wrapping materials for heat preservation and maintenance

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