A high-speed railway emergency repair beam convertible into a permanent bridge structure and its emergency repair method

Abstract

The invention discloses a high-speed railway emergency repair beam which can be converted into a permanent bridge structure and an emergency repair method thereof. The emergency repair beam is composed of mutually independent single-line emergency repair beams for the up and down lines in the temporary traffic state, and the single-line emergency repair beam adopts a prestressed steel box girder Structural form, the steel box girder is manufactured in segments, and the steel pin-shear key connection method is adopted between the segments, and longitudinal external prestressed steel bars are arranged above the lower flange of the steel box girder and on the inner side of the web. By pouring the concrete structure layer above the steel box girder, arranging and stretching the transverse prestressed tendons between the single-line emergency beams on the upper and lower lines, the emergency beams can form a double-line full-hole prestressed steel-concrete composite beam as a permanent bridge structure normal operation. The present invention is different from the existing emergency repair steel beams in that the traffic speed is high, and the beam structure used for temporary emergency repair is no longer dismantled, but through the conversion of the structural system, the temporary emergency repair beam is transformed into a permanent bridge structure, thereby avoiding Second replacement of damaged bridges.

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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