A method for laying cable ducts on roadbed

Abstract

The present invention provides a method for arranging a cable trough on a roadbed, comprising the steps of: providing the cable trough; and arranging the cable trough on the shoulder of the roadbed or outside the shoulder or at the toe of the subgrade bed of the roadbed. The method can make the cable trench separate from the foundation bed for laying, thereby effectively avoiding problems such as water accumulation in the cable trench, soaking of the foundation bed, poor drainage of the roadbed, and the like. Moreover, it can be laid to suit special working conditions, effectively ensuring the integrity of the cable tray and the stability of the roadbed, improving the service environment of the cable, thereby ensuring the service life of the cable and the safety of railway operation.

Description

technical field [0001] The invention relates to the technical field of railway roadbed cable troughs, in particular to a method for laying cable troughs on the roadbed. Background technique [0002] In recent years, my country's railway technology has developed rapidly, especially the high-speed railway. During the operation of the high-speed railway, in order to facilitate the maintenance and repair of the high-speed railway and ensure the safety of operation, various cables are usually laid in the form of cable troughs. As an important infrastructure, the cable tray is responsible for maintaining the normal power supply and communication of the line, and is the artery of the high-speed railway. [0003] At present, the cable ducts of high-speed railway subgrades in my country usually adopt the form of common communication signal ducts and separate electric power ducts, and the cable ducts and cover plates are prefabricated with reinforced concrete materials. The existing...

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Problems solved by technology

[0004] However, the existing cable tray still has some problems during service

For example, rainwater infiltrates into the subgrade bed through the gap between the cable trench and the surface of the inner subgrade bed, causing water accumulation in the cable trench, soaking the subgrade bed, and even causing problems such as instability of the subgrade slope

At the same time, the existence of the cable trough will affect the drainage of the subgrade bed and form a water blocking effect, which leads to an increase in the water content in the subgrade bed, causing problems such as subgrade frost heave

In addition, since the subgrade cable trough is usually set on the surface of the subgrade bed, and there are many crossing projects, it is necessary to cut the shoulder part of the filled subgrade bed during the construction process, which will easily cause the adjacent uncut grading to be broken. The stone part is loose, thus affecting the quality of the subgrade bed

In some special working conditions, the construction of cable trough laying is difficult, and the laying structure of cable trough is unstable

In addition, the drainage hole of the cable trough often encounters problems such as poor construction quality, which leads to poor drainage of the subgrade bed, which soaks the subgrade bed, which in turn leads to the occurrence of diseases such as subgrade muddying and subgrade frost heaving, which seriously affects the subgrade bed. quality

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