Method of transferring contact suspension for additionally building open-cut tunnel on electrified railway operating line

Abstract

The invention relates to a method of transferring a contact suspension for additionally building an open-cut tunnel on an electrified railway operating line. The method includes the steps of: building a section of open-cut tunnel foundation and two pieces of sidewalls close to a to-be-dismantled contact network supporting column; then vertically arranging an arch-shaped steel pipe bracket between the two sidewalls; transferring a contact suspension on the contact network supporting column onto the steel pipe bracket; constructing a whole open-cut tunnel after dismantling the contact network supporting column; and finally transferring the contact suspension onto an arch buttress bracket and dismantling the steel pipe bracket, etc. In the method provided by the invention, the arch-shaped steel pipe bracket as the device for transferring the contact suspension is vertically arranged in the open-cut tunnel under construction, in this way, not only the contradiction occurred due to the traditional contact network supporting column occupying the building site of an open-cut tunnel can be solved, but also the time for locking out a railway line is shortened maximally, so that the influence on the normal operation of electric locomotives is minimum, and at the same time, the construction of an arch ring of the open-cut tunnel can be continued. In addition, the safety of constructors is guaranteed due to a grounding wire laid on the steel pipe bracket.

Description

technical field [0001] The invention belongs to the technical field of railway tunnel construction, in particular to a method for adding an open hole transfer contact suspension on an electrified railway business line. Background technique [0002] Electrified railways usually erect a row of "丨"-shaped catenary pillars on one side of the rail. The top of each catenary pillar is fixed with an insulator and a contact suspension through a support device. The contact suspension includes a force-bearing extending along the direction of the rail. Cables and contact wires, the bow head of the pantograph on the electric locomotive touches the contact wire in a sliding manner, and it relies on the pantograph to take power from the contact wire as power to travel on the rail. When the above-mentioned electrified railway that has been put into operation is suddenly damaged by a landslide in a mountainous area, after repair, it is necessary to build an additional open hole above the rai...

AI Technical Summary

Problems solved by technology

However, when the position of the open hole is occupied by the existing catenary pillars, the existing catenary pillars must be dismantled before the open hole is built, which requires at least two months of construction period, and the electric locomotive cannot be installed due to the lack of catenary during construction. In this way, the construction does not meet the requirements of the Ministry of Railways' "Railway Business Line Construction and Safety Management Measures" Tieban [2007] No. 186 document: in the link where the construction of railway business lines affects traffic, the impact range must be the smallest and the impact time is shortest

In addition, before dismantling the catenary pillar, the contact suspension on it should be transferred to the arch wall bracket embedded in the inner wall of the arch circle of the open cave, but the existing catenary pillar is not removed, and the open cave at this position cannot be built. Therefore, there is no way to talk about the support of the arch wall. In this case, the disassembled contact suspension will have no place to fix it, so there is a contradiction between the two

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