STRUCTURE OF SUBGRADE OF RAILWAY TRACK Russian patent published in 2015 - IPC E02D17/18 

FIELD: construction.

SUBSTANCE: support elements are located pointwise on the slope of subgrade and provided with grid combined with geotextile. The invention consists in the fact that support elements are arranged on the slope of subgrade in the form of metallic pipes with length of 2.0-2.5 m, in this case at least 1/3 of the length of pipes is introduced into the body of subgrade, the rest of their parts are located freely above the surface of the slope at a distance of 1.2-1.5 m from each other and grid of double torsion is arranged between them, it is wrapped with geotextile, which leans by the lower edge upon the slope of subgrade, its upper edge coincides with the top part of metal pipes, sinuses between the grid and slope of subgrade are filled with draining soil, the upper surface of which is located at the level of the main site of subgrade and forms the normative side of the subgrade. Thus, the proposed device allows to broaden the main area of subgrade, retaining the existing structure of the subgrade, due to the pointwise location of the support elements, and application of grid in conjunction with geotextile permits to obtain a certain amount of sinuses, and therefore predict the rate of discharge of draining soil. It should be noted that this structure of the railway track subgrade is produced without the use of complex vehicles and machinery.

EFFECT: extension of the main site of subgrade without destroying the integrity of the subgrade, decrease of volume of the backfill draining soil.

2 dwg