RU2343243C2 - Ballast bed of rail track - Google Patents

Abstract

FIELD: construction, roadworks.

SUBSTANCE: invention pertains to construction of railroads, in particular, to the composition of ballast bed. Ballast bed of the track consists of crushed stone, silica sand and elastic rubber - based stuff. Grinded residuals of wire production are used as elastic rubber - based stuff with particles not bigger than those of crushed stone given the following components ratio, wt %: crushed stone - 55…60, silica sand - 13…15, wire production residuals - 27…32.

EFFECT: increased absorbing capacity of oscillations of the ballast bed for reduction of noise from rail transport moving.

1 tbl

Description

The invention relates to the field of road construction, in particular to a device for the lower structure of the urban rail transport.

Known ballast layer of the path / 1 / containing crushed stone, silica sand and rubber. This composition due to the low content of the elastic component does not have sufficient vibration absorbing ability, in addition, it is complex in composition and requires expensive technology.

The objective of the invention is to increase the absorption capacity of the oscillations of the ballast layer to reduce noise during the movement of rail vehicles.

To do this, in the ballast layer containing crushed stone and quartz sand, add an elastic filler based on rubber in the form of crushed waste tire production with particle sizes not exceeding the particle size of crushed stone, in the following ratio of components, wt.%:

crushed stone - 55 ... 60,

quartz sand - 13 ... 15,

tire production waste - 27 ... 32

To determine the optimal ratio of components and their experimental verification, four variants of the composition of the ballast layer were prepared, four sections of the tram track were completed. In these areas, noise levels were measured at various tram speeds.

The conditions and test results are shown in table 1.

The experimental results show that the optimal content in the ballast layer of crushed residues of tractor tires is 25 ... 32%. It is with this content of the elastic component that the lowest noise level is achieved. With a smaller number, the noise level is higher, with a larger level it does not decrease, but the consumption increases.

Table 1.
Noise level (dB) Speed, km / h The content of the elastic component,% twenty 27 32 51 fifteen 61 57 51.4 51 thirty 74 70 60.8 61 45 88 79 68.4 68

Information sources

1 SU 1348440 A1, 10.30.1987.

Claims (1)

The ballast layer of the rail track, containing crushed stone, quartz sand and an elastic filler based on rubber, characterized in that crushed tire waste with particle sizes not exceeding the particle size of crushed stone is used as an elastic filler in the following ratio of components, wt.%:
crushed stone 55 ... 60 quartz sand 13 ... 15 tire waste 27 ... 32