RU2450094C2 - Railroad sleeper - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: railroad sleeper contains two reinforced concrete elements under rail with all facilities for rail fastenings and medium connecting piece. Medium connecting piece is made of steel pipe with rectangular, round or shaped section which ends are embedded into reinforced concrete elements under rail. Ends of medium connecting piece are equipped with partitions from outside and inside of each reinforced concrete element. Rail fastenings are made integral with medium connecting piece and are installed in the area between partitions with their further concreting in reinforced concrete elements under rail.

EFFECT: improvement of rail fastenings reliability, technological effectiveness of rail manufacture, improvement of track stability due to increase of shearing resistance in ballast and rail fixation along their axes towards each other.

4 cl, 5 dwg

Description

The invention relates to the field of railway construction, namely to the upper structure of the track, which is designed to absorb the load from the rolling stock.

Known precast reinforced concrete sleepers, consisting of two reinforced concrete blocks and a connecting element made in the form of a removable beam, bolted to embedded parts, monolithic in reinforced concrete blocks, and on the rail track a recess is made and a corner is installed, which acts as a stop for the rail, and bolts ( RU, utility model patent No. 13378, class EB01 3/32, publ. 2004).

The disadvantages of the railway sleepers are:

the presence of the connecting element, attached to the embedded parts of reinforced concrete blocks, reduces the reliability of the sleepers in operation, since lateral loads during the movement of railway transport act on the connections of the connecting element, which leads to their destruction;

- embedded parts monolithic in reinforced concrete blocks require processing after pouring reinforced concrete, which complicates the process of manufacturing sleepers and increases their cost.

Known railway sleepers, adopted as a prototype, containing two rail reinforced concrete blocks with means for placing fasteners for rail fasteners and a middle connecting part made of steel, the ends of which are embedded in blocks, the middle connecting part contains a first pair of corners embedded in rail blocks in their upper parts on the sides of the holes with metal washers made perpendicular to the rail platforms of the blocks and designed to accommodate standard bolts xy fastenings installed on these sites, the second pair of corners located under the corners of the first pair and embedded in rail blocks in their lower part is similar to sealing corners of the first pair, with all corners oriented in the transverse plane so that the shelves of each corner are directed towards the shelves two other nearby corners; the corners of the middle part are embedded in under-rail blocks to a depth of at least 0.8 of the length of the blocks (RU, utility model patent No. 7414, class E01B 3/36, publ. 1998).

The disadvantages of the known railway sleepers are:

- the installation of embedded parts of rail fasteners in the vertical channels of reinforced concrete blocks of sleepers reduces the reliability of rail fastenings in operation, complicates the process of manufacturing sleepers due to the need to perform vertical channels and increases its cost;

- insufficient width of reinforced concrete blocks in the under-rail part of the sleepers, which does not provide a real increase in resistance to shear in the ballast, does not reduce the specific load on the ballast when passing vehicles and does not increase the life of the ballast prism in comparison with existing sleepers;

- sleepers are not fixed along their longitudinal axis with respect to each other, which reduces the stability of the path in the transverse direction.

The technical result of the invention is:

- improving the reliability of rail fastenings in operation, the manufacturability of sleepers and reducing its cost due to the implementation of embedded parts of rail fasteners as a whole with the middle connecting part, followed by monoling it in reinforced concrete blocks;

- the maximum increase in the width and length of reinforced concrete blocks in the rail section, a decrease in the specific load on the ballast during the passage of vehicles and an increase in track stability by increasing shear resistance in the ballast and fixing the sleepers along their longitudinal axis with respect to each other.

The specified technical result is achieved by the fact that in the railway sleepers containing two rail reinforced concrete blocks with means for placing fasteners of rail fasteners and a middle connecting part made of a steel pipe of rectangular, round or shaped profile, the ends of which are embedded in rail reinforced concrete blocks and made with partitions on the outer and inner side of each of the rail reinforced concrete blocks, fasteners for rail fastenings are made as a single integrally with the ends of the middle connecting part and are installed in the area between the partitions with their subsequent monolithing in reinforced concrete blocks, the end walls of the reinforced concrete blocks contain locking joints connecting adjacent sleepers with the possibility of limiting their lateral and longitudinal displacement from current loads during vehicle movement and temperature deformations, after installation on the way, the lock joints are filled with elastic material that limits their mutual movement and the lower surface of the rail reinforced concrete blocks is made with irregularities in the form of bulges or depressions.

Figure 1 shows the railway sleepers, a General view; figure 2 is a view in plan of the sleepers without locking joints; figure 3 is a view in plan of the sleepers with castle joints; figure 4 is a General view of the rail track in plan without locking joints and figure 5 is a General view of the rail track in plan with locking joints.

The railway sleepers (FIGS. 1, 2 and 3) contain two rail-mounted reinforced concrete blocks 1 with means for accommodating fasteners for rail fastenings 2 and a middle connecting part 3 made of steel pipe 4 of a rectangular, round or shaped profile, the ends of which 5 are embedded in rail reinforced concrete blocks 1 and are made with partitions 6 on the outer 7 and inner 8 side of each of the rail reinforced concrete blocks 1, the fasteners of rail fastenings 2 are made as a unit with the ends 5 of the middle connect part 3 and installed in the area between the partitions 6, followed by monoling them in the rail reinforced concrete blocks 1. The end walls 9 and 10 (Figs. 3 and 5) of the rail reinforced concrete blocks 1 contain locking joints 11 connecting adjacent sleepers with the possibility of limiting the transverse and longitudinal their displacement from existing loads during vehicle movement and temperature deformations; after mounting on the track, the locking joints 11 are filled with elastic material restricting their mutual movement, and the lower surface 12 of the rail reinforced concrete blocks 1 is made with irregularities 13 in the form of bulges or depressions.

Railway sleeper works as follows.

When passing a railway vehicle, dynamic loads in the vertical and horizontal planes, which are transmitted through the rails and sleepers to the ballast, act on the rail track. The larger the area of the rail reinforced concrete blocks 1, the lower the specific load on the ballast and, accordingly, the intensity of its wear. The width A of each of the rail reinforced concrete blocks 1 between the end walls 9 and 10 along the axis of the rail track and the distance B between the end walls 9 and 10 of the adjacent sleepers and their length B along the axis of the sleepers between sides 7 and 8 increase the contact area of the sleepers with ballast, decrease specific load on the ballast and increasing the stability of the path. The increase in the width of the rail reinforced concrete blocks 1 and the introduction of locking joints 11 reduces the specific load on the ballast in the horizontal plane, increases the shear resistance in the ballast and the fixation of sleepers along its longitudinal axis with respect to each other. The implementation of the fasteners of the rail fasteners 2 as a whole with the ends 5 of the middle connecting part 3 increases their reliability in operation, manufacturability of the manufacture of sleepers and reduces its cost.

Claims (4)

1. Railway sleepers, containing two rail reinforced concrete blocks with means for accommodating fasteners for rail fastenings and a middle connecting part made of a rectangular, round or shaped steel pipe, the ends of which are embedded in rail reinforced concrete blocks, characterized in that the ends of the middle connecting part made with partitions on the outer and inner side of each of the rail reinforced concrete blocks, fasteners for rail fastenings are made as one th integral with the ends of the middle connecting portion and installed in the area between the partitions with their subsequent embedment in concrete blocks under-rail. 2. The railway sleepers according to claim 1, characterized in that the end walls of the rail-reinforced concrete blocks contain locking joints connecting adjacent sleepers with the possibility of limiting their lateral and longitudinal displacement from the existing loads when the vehicle is moving and temperature deformations. 3. The railway sleepers according to claim 2, characterized in that after mounting on the track, the lock joints are filled with elastic material restricting their mutual movement. 4. Railway sleepers according to claim 1, characterized in that the lower surface of the rail reinforced concrete blocks is made with irregularities in the form of bulges or depressions.

Images