3.6 STRENGTHENING THE SLOPES OF THE RAILWAY TRACKBED

Abstract

The article deals with the scientific direction related to determining the actual state of the roadbed. Also with periodic reinforcement of the roadbed. To strengthen the slopes of embankments and recesses, various types of geosynthetics are used-geotextiles, geogrids, drainage trays made of composite materials.

The railway roadbed, unlike the upper structure of the track, is a long-term structure that can not be replaced and is operated during the entire life of the railway. Under the influence of external factors, defects and deformations occur in the roadbed, which affect the condition of the track and the safety of train traffic [1].

In General, the roadbed over a large area of the railway network of our country, despite its long service life, increased loads from rolling stock, and increased weight of the upper structure of the track, works satisfactorily. However, defects and deformations of the roadbed account for more than 6% of the operational length of the network's roads.

The defect of the roadbed is characterized by a violation of its transverse outlines of more than 31 %, ballast troughs of 2.6 %, deformations of the body of the embankment (sediments, alloys) of more than 30 %, and depths of more than 12 %. The rest are water washes, landslides, landslides, mudslides, karst, ice [2].

Laying the geogrid on the main site of the roadbed is performed during the repair of the path (modernization, reconstruction, major repairs) in two ways.