High-speed railway rush repair beam capable of being converted into permanent bridge structure, and rush repair method of high-speed railway rush repair beam

Abstract

The invention discloses a high-speed railway rush repair beam capable of being converted into a permanent bridge structure, and a rush repair method of the high-speed railway rush repair beam. The high-speed railway rush repair beam is formed by single-line uplink rush repair beams and single-line downlink rush repair beams which are independent of one another in a temporary traffic state; the single-line rush repair beams respectively adopt a structural form of a prestressed steel box girder, the steel box girders are manufactured in a way of segmentation, and segments of each steel box girder are connected in a manner of steel pin-shear key; a longitudinal external prestressed reinforcing steel bar is arranged above a lower wing plate of each steel box girder and at the inner side of a web of the steel box girder. By means of pouring a concrete structure layer above the steel box girders as well as arranging and tensioning transverse prestressed tendons between the single-line uplink rush repair beams and the single-line downlink rush repair beams, a double-track and whole-span prestressed steel-concrete composite beam is formed by the rush repair beams and can be used as the permanent bridge structure for normal operation. Compared with the existing rush repair steel beam, the high-speed railway rush repair beam is characterized in that the traffic speed is high, a beam part structure used for temporary rush repair is no longer dismantled, and the temporary rush repair beam is converted into the permanent bridge structure by the conversion of a structural system, so that beam-replacing construction of a damaged bridge is further avoided.

Description

technical field [0001] The invention relates to a high-speed railway bridge repair equipment and a repair method thereof, in particular to a high-speed railway medium-span simply supported beam bridge structural repair equipment, which belongs to the technical field of bridge repair. Background technique [0002] In the high-speed railway, the bridge mileage accounts for a high proportion of the total mileage of the line. Although the design and construction standards of high-speed railway bridges are very high, considering their huge number and wide geographical distribution, the potential for disaster damage is relatively high. At present, there is no special equipment reserve for high-speed railway bridge repair at home and abroad. The existing beam repair equipment is developed for ordinary railway bridge repair, including 64-type railway military beams, 87-type railway emergency repair steel beams and disassembled beams, etc. However, these beam repair equipment all ha...

AI Technical Summary

Problems solved by technology

At present, there is no special equipment reserve for high-speed railway bridge repair at home and abroad. The existing beam repair equipment is developed for ordinary railway bridge repair, including 64-type railway military beams, 87-type railway emergency repair steel beams and disassembled beams, etc. However, these beam repair equipments have the disadvantages of slow traffic speed and the need for secondary frame replacement, and their technical and tactical performance indicators cannot meet the needs of high-speed rail bridge repairs.

The large number of high-speed rail bridges that have been put into operation are faced with the dilemma that there is no emergency repair technology support and no emergency repair equipment reserves after damage

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