Subgrade of sand transportation railway

Abstract

The invention relates to a sand conveying railroad bed. The sand conveying railroad bed comprises a surface layer of a subgrade bed, a bottom layer of the subgrade bed, a foundation, and an embankment main body located between the foundation and the bottom layer of the subgrade bed, wherein a sand conveying cavity moving towards a railroad bed cross-section is formed inside the embankment main body. The sand conveying cavity comprises an inlet section, a wind collecting section, a sand conveying section and an outlet section. According to the sand conveying railroad bead, sand blown by the wind on a windward side of the embankment is continuously aggregated and accelerated through the sand conveying cavity by aerodynamic force, so that the sand is smoothly conveyed to a leeside of the embankment through the railroad bed. A sand collecting pit is formed at the tail end of the sand conveying cavity, and sand materials passing through the railroad bed are collected in the sand collecting pit for centralized treatment. By using the railroad bed, accumulation of the sand materials at a road bed and a subgrade slope can be effectively prevented and treated to ensure that railroad transportation at the embankment section with the sand blown by the wind is not interrupted due to sand-burying and maintain the safety of railroad transportation.

Description

technical field [0001] The invention relates to the field of roadbed structure design of a sandstorm section, in particular to a sand-carrying railway roadbed for a sandstorm section where the main wind direction is single and the included angle with the railway line is relatively large or perpendicular. Background technique [0002] In my country, deserts, Gobi and sandy lands account for 18.03% of the total land area. These areas have dry climate, little rainfall and frequent strong winds. They are mainly distributed in Xinjiang, Inner Mongolia, Tibet, Qinghai and Gansu provinces. Since the Baolan-Lanzhou Railway was opened to traffic in 1958, there have been Lanxin, Nanjiang, Beijiang, Qinghai-Tibet, Taizhongyin and other lines passing through this area. The passing of the railway line will hinder the moving sand flow, and the sand will accumulate on the side slope of the roadbed and the rail of the track bed, and the wind and sand will erode the shoulder of the embankmen...

AI Technical Summary

Problems solved by technology

However, the above three measures have a certain service life and require frequent maintenance, and they have no protective effect on the sand that has been blown to the railway embankment by the wind.

The existing sand transportation measures are as follows: the air guide grille cannot transport the sand near the roadbed through the railway and accumulate on the roadbed due to the blockage of the roadbed, thereby interrupting the railway transportation

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