Construction method for guided way for embedded railway traffic engineering

Abstract

The invention discloses a construction method of an embedded rail transit engineering guide rail, and aims to provide a construction method capable of reducing construction difficulty, simple and easy construction process, low construction cost and high construction efficiency. It includes the following steps: derusting the guide rail, applying U90 primer to the bottom and side of the guide rail; welding the guide rail, including air pressure welding for the long rails of the entire line and curved rails with a curvature radius greater than 200m, and for the switch area and small Narrow-gap manual arc welding is used for curved rails with a radius of curvature; the bonding primer P21 is sprayed on both sides of the rail support groove and the guide rail, and epoxy resin is poured. The construction method of the invention reduces the operation difficulty, reduces the construction cost and improves the construction efficiency. By formulating an effective and feasible welding process, the construction quality is guaranteed, and the problem of rail seam welding in the turnout area is effectively solved.

Description

technical field [0001] The invention relates to a construction technology of an embedded rail transit project. Background technique [0002] The embedded rail transit project is a brand-new urban rail transit project. This new type of traffic project is the first case in China. The project adopts the guide rail and special turning turnout of the TRANSLOHR system. At present, the embedded rail transit construction technology refers to The construction technology of French LOHRE company and the resin material of international EDILON company. The above-mentioned construction techniques require professional construction teams and special construction equipment, which are not suitable for China's national conditions, and domestic construction is restricted. The main problems are as follows: [0003] 1. Seamless welding technology of guide rail: [0004] For the guide rails and turnouts of the TRANSLOHR system, the design requires the use of aluminothermic welding for long rails...

AI Technical Summary

Problems solved by technology

[0004] For the guide rails and turnouts of the TRANSLOHR system, the design requires the use of aluminothermic welding for long rails. However, aluminothermic welding is costly and inefficient, and it is not suitable for narrow gap welding of track seams in the turnout area.

In addition, according to the components provided by the guide rail manufacturer, the carbon content is between 0.4-0.6 and the manganese content is about 1.2. Combining other components, the carbon equivalent is high and the weldability is poor

At the same time, due to the limitation of the welded joint form and improper welding process, it is easy to produce defects such as pores, cracks and slag inclusions.

[0005] 2. The construction technology of Edilon Primer U90WB (U90) in EDILON series products has limitations:

[0006] In the construction of Edilon Primer U90WB, the U90 primer treatment of the guide rail is required to be completed after sandblasting and construction before entering the tank after being transported to the site. Since the guide rail is still easy to rust after sandblasting and placed in the open air, the rust removal work It brings great difficulty to the construction, requires considerable manpower and material resources to derust, and the construction efficiency is low

[0007] 3. The pouring mold provided by the French side is very soft, it is not easy to demould, and the construction is difficult

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