A prefabricated asphalt-based ballastless track and its construction method

Abstract

The invention provides a prefabricated asphalt-based ballastless track and its construction method, which is characterized in that it includes a track slab located above and a granular base layer, a permeable layer, and a compact track slab located below the track slab in sequence from bottom to top. The asphalt concrete layer, non-woven geotextile, and dense asphalt concrete layer on both sides of the road shoulders are paved with waterproof asphalt prefabricated blocks on site, in which the track slab, non-woven geotextile, and dense asphalt concrete layer constitute a prefabricated composite board. The composite panels are spliced ​​to form a complete track structure. The track structure provided by the present invention can disperse the load of the upper train on the premise of ensuring the high smoothness of the high-speed railway track, so that it can be evenly distributed and transmitted downward; the dense asphalt concrete layer can slow down the impact of the vibration generated by the dynamic load of the high-speed train on the lower structure impact, and can reduce the noise generated when the train passes by, and play the role of cushioning and shock absorption to reduce noise.

Description

technical field [0001] The invention relates to the technical field of high-speed railway and urban rail transit, in particular to a prefabricated asphalt-based ballastless track and a construction method thereof. Background technique [0002] High-speed railway is the development trend of my country's passenger railway. Due to the double constraints of the impact of ballast flying on the high-speed railway operation of ballasted track and the lack of ballast raw materials for my country's high-speed railway, ballastless track is called the main trend of my country's high-speed railway development. [0003] There are three main types of slab track currently used in my country, namely the CRTS I slab track evolved from the Japanese Shinkansen ballastless track, the CRTS II slab track evolved from the German Borg slab, and the CRTS III slab track independently developed by my country. The most widely used track type is the CRTSⅢ slab ballastless track, which is different from t...

AI Technical Summary

Problems solved by technology

During construction, it is usually paved layer by layer from bottom to top on site, such as hoisting sleepers, assembling rail rows, rough adjustment and fine adjustment, and concrete pouring. This construction method requires a lot of manpower and time at the construction site, and the construction The process is greatly affected by the weather and climate on site

[0004] At the same time, the upper part of the ballastless track subgrade is almost entirely composed of concrete structure, which has sufficient strength and rigidity, and can meet the high ride comfort requirements of high-speed railways, but the vibration and noise are relatively large

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