Redbeds mudstone filled high-speed railway subgrade and construction method thereof

Abstract

The invention discloses a red bed mudstone filled-up express railway subgrade and construction method thereof. The subgrade consists of a red bed mudstone filling layer (3), a subgrade bed (2) and a track concrete foundation (1) which are filled on a subgrade base (4) in sequence, wherein, a cross section of the subgrade is of rectangle, the surface of the subgrade adopts a fully-closed water-proof structure (5), a slope of the subgrade is provided with a slope protection structure (6) and strengthened by a slope strengthening structure (11), a waterproof and drainage cushion (7) is arranged between the subgrade base (4) and the bottom surface of the red bed mudstone filling layer (3). The subgrade has the characteristics of high strength, small deformation, good stability and durability,economy, etc., and can fulfill the requirements of high smoothness, stability and durability of ballastless tracks to lines. The construction method is of simple craftwork, reasonable technology, andeasy control of filling quality; cost used for purchasing and transporting high-quality fillers can be greatly saved, waste soils caused when the subgrade is filled can be reduced, environment is protected. The invention has important economic and social benefits.

Description

technical field [0001] The invention relates to a railway subgrade and a construction method thereof, in particular to a ballastless track subgrade filled with red bed mudstone in a high-speed railway project and a construction method thereof. Background technique [0002] High-speed railway ballastless track puts forward very high requirements on the smoothness, stability, and durability of the line, especially the ballastless track on the soil roadbed, which has a negative impact on the post-construction settlement and uneven settlement of the roadbed foundation. strict restrictions. Generally speaking, the ballastless track subgrade should be filled with high-quality fillers such as Group A and B fillers. [0003] Red bed mudstone is a special kind of coarse-grained filler. Its particles are easily broken, its strength is low, it is easy to disintegrate and soften when exposed to water, and it also has weak expansibility, showing different engineering mechanical properti...

AI Technical Summary

Problems solved by technology

At present, there is still a lack of reasonable methods for using red bed mudstone in high-speed railway projects in my country. Therefore, it is urgent to carry out research on the application of red bed mudstone in high-speed railway ballastless track subgrades, and propose a set of systematic subgrades filled with red bed mudstone and its construction method

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