A method for applying lateral prestressing of reinforced concrete for prefabricated bridge deck pavement

Abstract

The invention relates to the technical field of construction and conservation of highway bridges, in particular to a lateral prestress application method for paving reinforcing bar concrete on a bridge floor of an assembled type bridge. According to the prestress application method disclosed by the invention, lateral prestress is applied for paving the reinforcing bar concrete on the bridge floor of the assembled type bridge, so that the lateral connection of the bridge is strengthened, the lateral completeness is improved, the lateral load distribution capacity is improved, and the service life of the paved bridge floor is prolonged. Examination, re-pulling and reinforcing are convenient, the prestress loss of steel strand wires is convenient to examine, and if the loss of the steel strand wires is found, tensioning reinforcing can be performed at any time. The method, materials and construction machines and tools are simple, technique maturity is high, and the method is easy to master, and convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of highway bridge construction and maintenance, in particular to a method for applying transverse prestressing force of reinforced concrete on deck pavement of an assembled bridge. Background technique [0002] Since the reform and opening up, my country's highway transportation has developed rapidly. By the end of 2014, the total mileage of national highways reached 4.4639 million kilometers, including 111,900 kilometers of expressways. Bridges are an important part of highways. With the rapid development of highway construction, the number of bridges is also increasing rapidly. According to incomplete statistics, there are currently about 500,000 bridges of various types in my country, and more than 10,000 bridges are built every year. At present, my country is moving from a "bridge country" to a "bridge country". [0003] Prefabricated bridge is a common type of bridge with large quantity and wide area am...

AI Technical Summary

Problems solved by technology

[0004] The outstanding problems of prefabricated bridges are weak lateral connections and poor integrity, resulting in poor laterally distributed load capacity and reduced bearing capacity, and the bonding force between bridge deck concrete and main beam concrete is weak, and bridge deck pavement has poor followability. Coupled with serious overloading and heavy traffic volume, the bearing capacity of the bridge is relatively insufficient. As a result, the bridge deck pavement is often damaged prematurely after 3-5 years of use, and even the single plate is stressed, which not only affects the service quality and traffic of the bridge ability, there are potential safety hazards, and even cause safety accidents

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