A new type of bridge reinforcement system and its construction method

Abstract

The invention discloses a novel bridge reinforcement system and its construction method. The system includes a movable steering block, a backing plate, an inner spiral sleeve, a main screw, a connecting piece, a longitudinal support rod, a transverse support rod, and a smooth sleeve. , the movable steering block is reserved with steel beam steering holes, the prestressed steel beams pass through the steel beam steering holes and are anchored on the main beam to be strengthened, the backing plate is preset with thrust bearings, hinged joints and screws, and the top of the main screw is welded There are gears. During construction, it is only necessary to connect the gears to the motor through a chain. The motor pulls the gears to drive the main screw to rotate, thereby pushing the movable steering block and the inner helical sleeve to move as a whole, and pushing the prestressed steel beams to elongate, thereby realizing external prestressing. The tension of the main girder to be reinforced is prestressed, which has the effect of strengthening the bridge. The construction method of the system of the present invention is simple and safe, and the construction equipment is simple, and is especially suitable for the maintenance and reinforcement of bridges with no tension space at the beam end.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a novel bridge reinforcement system and a construction method thereof. Background technique [0002] Since the reform and opening up, with the rapid development of the national economy, the transportation industry has also undergone rapid changes. In order to ensure the normal operation of transportation, it is necessary to strengthen the repair and maintenance of transportation facilities. In the past 20 years, my country's traffic volume has continued to increase, and bridge loads have become increasingly heavier. Therefore, bridges generally have insufficient bearing capacity. In addition, bridges have been exposed to the natural environment (atmospheric corrosion, temperature, and humidity changes) for a long time, and bridges continue to age. , damaged, the problem is more serious. The bridge is the throat to ensure the smooth flow of traffic, and its bearing capa...

AI Technical Summary

Problems solved by technology

[0012] The traditional prestressed steering wheel is completely fixed, and the eccentricity of the prestressed steel beam cannot be adjusted after the steering block is installed. However, the external prestress will lose with the passage of time. The traditional prestressed steering wheel, The eccentricity of the prestressed steel beam cannot be adjusted, so the linear shape of the prestressed beam cannot be adjusted, so the effect of external prestress on the structure cannot be adjusted

[0013] At present, external prestressing structure technology is widely used, but due to natural disasters or other factors, external bundles sometimes need to be re-tensioned, repaired or replaced

The construction process of the traditional re-tensioning or replacement of the external beam is more complicated and dangerous. Therefore, the original external beam should be inspected before construction, and detailed engineering analysis and design should be carried out to avoid accidents. , higher project cost

Images