EA036000B1 - Surface water drainage system for a double-track ballastless railway superstructure - Google Patents

Abstract

The invention relates to railway track superstructures and may be used for surface water drainage from a supestructure of a double-track ballastless railway track with a longitudinal grade less than 2‰. A surface water drainage system for a double-track ballastless railway superstructure comprising longitudinal drainages along the slopes on the both track sides characterized in that the asphalt-concrete course is laid across the entire width of the supporting subgrade, lateral drainage channels in the form a gap between the adjacent foundation slabs are provided for each track on the same level spaced at two or three or four foundation slabs, the gap is equal to 50-150 mm, a drain channel is installed opposite the outlet of each lateral drainage channel on the roadbed embankment slope, the drain channel is composed of telescopic reinforced concrete flumes, the subgrade support base is inclined to the appropriate longitudinal drainage, and the face of the asphalt-concrete course between each adjacent lateral drain channels is graded longitudinally and transversely from its center, the inside surface of the lateral drain channels and foundation slab and asphalt-concrete course joints on the shoulder and intertrack space surface being waterproof. The proposed system does not affect the ballastless railway track and roadbed design, which is essential in case of a broad daily range of temperatures, the system is designed for unhindered maintenance.

Description

The invention relates to the topside of a railway track and can be used to drain surface water from the topside of a double-track ballastless railway track with a longitudinal slope of less than 2% o.

The ballastless structure of the track superstructure on high-speed lines does not provide for drainage of sediments into the protective layers of the roadbed. In order to avoid soaking of the protective layers of the subgrade and the reliable operation of the ballastless structure of the high-speed highway (HSR) track, the paving of asphalt concrete over the entire width of the main site of the subgrade is now widely used. Since asphalt concrete is practically a non-draining material, the formation of stagnant water is possible in the spacing between the I and II main tracks on the tracks, which, according to the conditions for ensuring the reliable operation of the high-speed railway, must be diverted.

Surface water, which appears due to rainfall or snow melting, should be diverted in longitudinal or transverse directions from the main site of the roadbed with diversion to drainage structures of the railway track (ditches, ditches, trays). On sections with a longitudinal slope of more than 2% o the movement of water along the layer of asphalt concrete is carried out due to the slope of the longitudinal profile of the track. In areas with a longitudinal slope of less than 2% o, the formation of stagnant water between the paths is possible. As a result, the water collected in the longitudinal direction must be diverted in the transverse direction and directed to the drainage structures of the high-speed railways.

There is a known device for draining water from the upper structure of a double-track ballastless railway track, in which the longitudinal and transverse branch channels are made in a rail plate, at the point of their intersection there is a drain channel connected to a drainage well (EP 2468964A1, EO1B1 / OO; EO1B 29/00; EO1C 9/04, June 27, 2012).

However, in climatic conditions with a large daily temperature range, water freezing under the rail and in the fasteners is possible, which can lead to deformation of the rail track.

The closest analogue is a drainage device from the topside of a double-track ballastless railway track containing longitudinal drainage channels along the slopes on both sides of the track and a monolithic layer of asphalt concrete placed on the surface of the main site of the subgrade, and the rail slab and layers of asphalt concrete on the surface of the shoulders and between the paths are at the same level, while the surface of the shoulders of the main site of the roadbed is made with a slope to the corresponding slope of the roadbed (CN 202730544 U1, E01B 1/00; EO1B 2/00; E02D 27/35, 2013.02.13).

The disadvantage of the known technical solution is the possibility of water freezing under the rail and in the fasteners, as well as in the water intake wells in conditions with a large daily temperature range, which can lead to deformation of the rail track and the subgrade.

The technical result of the invention is to increase the reliability of drainage in climatic conditions with a large daily temperature amplitude on double-track sections of a ballastless railway track with a longitudinal slope of less than 2% o, excluding the effect of water freezing on rails and fastenings, and simplifying the operation of the device.

The technical result is achieved by the fact that the device for drainage of surface water from the upper structure of a double-track ballastless railway track contains longitudinal drainage channels along the slopes on both sides of the track, on each track at the same level every two or three or four foundation slabs are installed transverse drainage channels in the form of a gap between adjacent foundation slabs with a gap of 50-150 mm, opposite the outlet of each transverse outlet channel on the slope of the embankment of the subgrade there is a drain channel made of reinforced concrete trays installed telescopically, a layer of asphalt concrete is laid over the entire width of the main site of the subgrade, the base surface of the subgrade is made with with a slope to the corresponding longitudinal drainage system, and the outer surface of the asphalt concrete layer in the path between each adjacent transverse branch channels - with longitudinal and transverse slopes from the center of the pathway, while the inner surface of the transverse branch channels piles, as well as the joints of the foundation slabs and the layer of asphalt concrete on the surface of the shoulders and between the paths are waterproofed.

The surface of the layer of asphalt concrete on the side of the main site of the roadbed is made with a slope to the adjacent slope of the embankment.

Each branch channel of each track is made with a slope to the asphalt concrete layer of the corresponding shoulder.

The inner surface of the diversion channels, as well as the joints of the foundation slabs and the layer of asphalt concrete on the surface of the shoulders and between the paths are waterproofed by spraying a layer of polyurethane-based varnish.

The essence of the invention is illustrated by the drawing, which shows a cross section of a double-track ballastless railway track.

The device for drainage of surface water from the upper structure of a double-track ballastless railway track contains longitudinal drainage systems 1 along the slopes 2 of the roadbed and a layer 3 of asphalt concrete, laid over the entire width of the main site of the roadbed 4, on each track on

- 1 036000 one level every two foundation slabs 5 are installed transverse branch channels 6 in the form of a gap between adjacent foundation slabs 5, the size of the gap is (50-150) mm.

Opposite the output of each transverse outlet channel 6 on the slope 2 of the embankment of the subgrade 4 there is a drain channel 7 of reinforced concrete trays installed telescopically.

The surface of the foot 8 of the base of the subgrade 4 is made with a slope towards the corresponding longitudinal drainage 1, and the outer surface of the layer 3 of asphalt concrete in the path between each adjacent transverse outlet channels 6 - with longitudinal and transverse slopes from the center of the pathway.

The inner surface of the transverse branch channels 6, as well as the joints of the foundation plates 5 and the layer 3 of asphalt concrete on the surface of the shoulders and between the paths are waterproofed (not shown in the drawing). The width of the transverse branch ducts 6 and 7 is 50-150 mm.

The surface of the layer 3 of asphalt concrete on the side of the main site of the roadbed 4 is made with a slope to the adjacent slope 2 of the embankment.

Each branch channel 6 of each path is made with a slope to the surface of the layer 3 of asphalt concrete of the corresponding shoulder (not shown in the drawing).

The inner surface of the branch channels 6, as well as the joints of the foundation slabs 5 and layer 3 of asphalt concrete on the surface of the shoulders and between the paths are waterproofed by spraying a layer of polyurethane-based varnish.

The surface water drainage device is designed for open drainage of water from the inter-track section 4 of the ballastless railway track with a longitudinal slope of less than 2% o.

For the transverse drainage of water, longitudinal drainage channels 6 are installed in the form of a gap between adjacent foundation slabs 5 through every three foundation slabs 5 of the ballastless railway track section. The size of the gap is 50-150 mm.

Transverse branch channels 6 are arranged on each track at the same level every 27.5-60 m, depending on the longitudinal slope of the track and the rainfall area of construction. The choice of the value of the minimum permissible distance of 27.5 m is due to the lateral stability of the track structure from ejection, the maximum distance - from the conditions of the throughput of the branch channels 6.

The execution of the outer surface of the layer 3 of asphalt concrete in the path between each adjacent transverse branch channels 6 with longitudinal and transverse slopes from the center of the path increases the rate of water flow diversion.

Water from the surface of the pathway along the transverse diversion channels 6 and installed on the slope 2 of the embankment of the subgrade 4 drain channels 7 from the reinforced concrete trays is diverted into the corresponding longitudinal drainage 1 - a ditch, ditch or tray.

The surface of the foot 8 of the base of the subgrade, made with a slope to the corresponding longitudinal drainage channel 1, also increases the rate of diverting the water flow from the drain channels 7 to the drainage system 1.

Waterproofing the inner surface of each branch channel 6, as well as the joints of the foundation slabs 5 and layer 3 of asphalt concrete on the surface of the shoulders and between the paths provides reliable protection of the concrete of the foundation slab 5 and subgrade 4 from water penetration.

In this case, in case of clogging of one transverse outlet channel 6, water flows into the next transverse outlet channel 6.

Thus, the proposed device does not affect the design of the ballastless track and subgrade, which is especially important in conditions with a large daily temperature range. In addition, the design of the device for removing surface water from a double-track section of a ballastless railway track takes into account the possibility of its unhindered maintenance.

Claims (4)

CLAIM 1. A device for diverting surface water from the topside structure of a double-track ballastless railway track, containing longitudinal drainage systems along the slopes on both sides of the track, characterized in that the layer of asphalt concrete is laid over the entire width of the main site of the roadbed, on each track at the same level every two or three or four foundation slabs are installed transverse outlet channels in the form of a gap between adjacent foundation slabs with a gap of 50-150 mm, opposite the outlet of each transverse outlet channel on the slope of the embankment of the subgrade there is a drain channel made of reinforced concrete trays installed telescopically, the surface of the base of the subgrade is made with a slope to the corresponding longitudinal drainage system, and the outer surface of the asphalt concrete layer in the path between each adjacent transverse branch channels - with longitudinal and transverse slopes from the center of the pathway, while the inner surface of the transverse branch channels, as well as the joints of foundation slabs and a layer of asphalt concrete on the surface of the shoulders and between the paths are waterproofed. 2. The device according to claim 1, characterized in that each branch channel of each path is made with a - 2036000 with bosom to the layer of asphalt concrete of the corresponding shoulder. 3. The device according to claim 2, characterized in that the surface of the asphalt concrete layer on the side of the main site of the roadbed is made with a slope towards the adjacent slope of the embankment. 4. The device according to claim 3, characterized in that the inner surface of the diversion channels, as well as the joints of the foundation slabs and the layer of asphalt concrete on the surface of the shoulders and between the paths are waterproofed by spraying a layer of polyurethane-based varnish.