Existing electrified railway cable commissioning construction method

Abstract

The invention belongs to the technical field of electrified railway cable construction and provides an existing electrified railway cable commissioning construction method. The method comprises the following steps that S1, a line in a whole power supply arm range involved in cable commissioning is blocked; S2, three times of impact tests are carried out, wherein impact test preparation is carriedout before each impact test; during an impact test, one end of a to-be-commissioned cable is connected with an overhead line system located at one end of a tunnel, the other end of the to-be-commissioned cable is disconnected with the overhead line system, then a grounding wire is removed, power is supplied to a 214 feeder line, power is continuously supplied for 5 min, and whether the cable has abnormal phenomena of abnormal sound, peculiar smell and discoloration or not is observed; S3, a no-load test is carried out, on the basis of the third impact test, the state of the cable is kept to beput into operation unchanged, i.e., the no-load state is kept for 24 hours; and S4, a loading test is carried out, specifically, two ends of the to-be-put-into-operation cable are connected with contact networks located at the two ends of the tunnel correspondingly, circuit loading is carried out, and loading lasts for 24 h. According to the method, the construction quality and construction efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of electrified railway cable construction, in particular to a construction method for putting into operation an existing electrified railway cable. Background technique [0002] With the continuous development of my country's railway construction, the reconstruction of existing electrified railways is gradually increasing. Due to the low clearance of railway tunnels constructed in the early stage, in the construction of expansion and reconstruction of existing electrified railways, "simple suspension + current-carrying cables" contact is often used The form of network erection is through the low-clearance tunnel, that is, a 27.5kV current-carrying cable is laid overhead on the tunnel wall instead of the load-bearing cable, which has the effect of increasing the current-carrying area. In the construction of capacity expansion and transformation of existing electrified railways, how to quickly, efficiently and ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low cable operation efficiency and high safety risks in the construction of existing electrified railway capacity expansion and reconstruction, the present invention provides a construction method for existing electrified railway cable operation

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