Prefabricated asphalt substrate type ballastless track and construction method thereof

Abstract

The invention provides a prefabricated asphalt substrate type ballastless track and a construction method thereof. The prefabricated asphalt substrate type ballastless track is characterized by comprising an upper track plate, and further comprising a granular material base layer, a permeable layer, a compact asphalt concrete layer and non-woven geotextile which are sequentially arranged below thetrack plate from bottom to top, waterproof asphalt precast blocks are laid on road shoulders on the two sides of the compact asphalt concrete layer on site, the track plate, the non-woven geotextileand the compact asphalt concrete layer form a precast composite plate, and multiple composite plates are spliced to form a complete track structure according to actual requirements. According to the track structure, on the premise that high smoothness of the high-speed railway track is guaranteed, the load of an upper train can be dispersed, and the load is evenly distributed and transmitted downwards; and the compact asphalt concrete layer can reduce the influence of vibration generated by dynamic load during running of the high-speed train on a lower structure, can reduce noise generated when the train passes by, and plays a role in buffering, shock absorption and noise reduction.

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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