Jacking construction method for large-span frame-structure bridge of combined I-shaped beam continuous reinforced line

Abstract

The invention relates to a construction method of an overhead railway jacking frame-structure bridge, in particular to a jacking construction method of a large-span frame-structure bridge of a combined I-shaped beam continuous reinforced line. The large-span frame-structure bridge is prefabricated on the right side of a railway line. An I100 I-shaped beam and H70 type transverse lifting beam combined overhead system is adopted for reinforcement and overhead operation. The I100 I-shaped beams are arranged at the positions 2.2 m away from the left side and the right side of the center of the line, and each set of longitudinal beams are connected through an H20 steel sleeper. H70 type reinforced transverse lifting beams are arranged at the rail bottoms of two transverse supporting piles, andthe transverse lifting beams extend out of the center lines of the longitudinal beams by 4.5 m on the right side of the line, so that a box culvert top plate is conveniently jacked into the transverselifting beams as early as possible; the transverse lifting beams extend to in-place pile crown beams from the left side of the line to prevent the line from transversely moving in the jacking period.Two rows of steel bar pull rings are embedded in the box culvert top plate, and the line and the bridge body are connected by using a chain block and a steel wire rope during jacking to prevent the line from transversely moving. The method is suitable for large-span frame structure jacking construction or temporary line reinforcement and the like which cannot be used by the I-shaped beams.

Description

technical field [0001] The invention relates to a construction method for jacking a frame-structure bridge of an overhead railway, in particular to a construction method for jacking a large-span frame-structure bridge of a line with continuous reinforcement of combined construction beams. Background technique [0002] With the rapid development of my country's national economy and transportation, the number of intersections between roads and railways planned by local governments has increased, and the width and height of existing railway overpasses cannot meet the development needs of local governments. The hole diameter is getting bigger and bigger, and some various and mature construction techniques for overhead railway jacking frame bridges have been formed, such as the line jacking method for rail buckle beam reinforcement, I-beam reinforcement line jacking method, and D-beam reinforcement. The line jacking method, the construction beam reinforcement line jacking method, e...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of safe and rapid construction of long-span jacking frame bridges, the invention provides a jacking construction method for long-span frame bridges with combined construction beams and continuous reinforcement lines

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