Method for changing and transferring catenary rods

Abstract

The invention relates to a method for changing and transferring catenary rods. The method comprises the following steps of before a frame bridge is jacked, planting lower end parts of steel truss headspan suspension catenary rods into the corners of a top beam; temporarily connecting a guy wire to the tops of the two steel truss headspan suspension catenary rods corresponding to two sides of a railway line; transferring a catenary high-voltage line located on the frame bridge to the guy wire and disassembling the catenary rods; 4) recovering the operation of the railway line, and performing the jacking of the frame bridge by a conventional jacking method; disassembling the steel truss headspan suspension catenary rods from protecting piles and the top beam, hoisting the disassembled steel truss headspan suspension catenary rods to the frame bridge, and assembling the lower ends of the steel truss headspan suspension catenary rods to an anchoring bracket base together; and finally mounting supporting rods on the upper ends of the steel truss headspan suspension catenary rods and arranging the catenary high-voltage line on the supporting rods. The method disclosed by the invention has the effects that the stability is good; the construction is simple and convenient; the complexity and the danger of changing and transferring the catenary rods can be reduced; the influence on the normal operation of a railway can be reduced to minimum, and the cost is reduced; and the problem that the frame bridge in a long span cannot cross the railway is solved, and the technology is advanced.

Description

technical field [0001] The invention belongs to the technical field of railway bridge and culvert construction, in particular to a catenary pole modification method for a jacking area of ​​a railway frame bridge passing under it. Background technique [0002] With the continuous development of urban construction, the number of municipal roads crossing railways is increasing, and the planning width is increasing. At present, the railway tunnel is mainly used to cross the railway. The railway tunnel is mainly composed of a frame bridge and approach roads located at the front and rear ends of the frame bridge. The frame bridge is mostly set under the railway by jacking. figure 1 It is a schematic diagram of the planar structure of an electrified railway in the prior art. figure 2 It is a schematic cross-sectional view of an electrified railway in the prior art. like figure 1 , figure 2 As shown, a plurality of catenary poles 2 are arranged at intervals on both sides of th...

AI Technical Summary

Problems solved by technology

The disadvantage of the former construction method is that it is more cumbersome. First, the original catenary pole 2 needs to be moved and then restored, and the construction cost is relatively high.

The disadvantage of the latter construction method is that it is greatly affected by the jacking of the frame bridge. If the subgrade collapses or the frame bridge "heads up" or "heads up", the catenary poles will change greatly, so the risk is also greater

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