EP0604202A2 - Railway sleeper - Google Patents
Railway sleeper Download PDFInfo
- Publication number
- EP0604202A2 EP0604202A2 EP93310399A EP93310399A EP0604202A2 EP 0604202 A2 EP0604202 A2 EP 0604202A2 EP 93310399 A EP93310399 A EP 93310399A EP 93310399 A EP93310399 A EP 93310399A EP 0604202 A2 EP0604202 A2 EP 0604202A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeper
- sheet metal
- under surface
- tunnel
- tunnel wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
- E01B3/16—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from steel
- E01B3/20—Sleeper construction for special purposes, e.g. with openings for ballast working
Definitions
- This invention relates to railway sleepers When track is laid in tunnels, it is conventional to lay sleepers across the tunnel so that the ends of the sleepers bear on the tunnel wall, and to locate a pad at the end of each sleeper in order to distribute stress applied by the sleeper on the tunnel wall. We have found, however, that the stress exerted on the wall can still lead to damage of the wall.
- a railway sleeper having an under surface that is curved in order to enable the sleeper to be positioned in a tunnel so that a major part of the under surface is in contact with the tunnel wall.
- the sleeper is designed so that at least 75% of the under surface, and especially substantially the entire under surface, is capable of bearing on the tunnel wall in use. This has the advantage that the stresses applied by the sleeper on the tunnel wall are substantially reduced with respect to existing designs, with consequential reduction or even elimination of damage to the tunnel wall by the sleeper.
- the sleeper may conveniently be formed from sheet metal.
- the central part of the sleeper, spanning the rails in use is preferably formed from a single strip of sheet metal that is curved to lie flat on the tunnel wall.
- This construction has the advantage that it has a very low profile in the central part of the sleeper and exhibits little or no obstruction for example to personnel walking along the track.
- the sleepers can have a relatively low weight and can easily be transported, installed and removed.
- a baseplate for a rail of the track wi II be provided in the region of each of the sleeper, the baseplate preferably also being formed from sheet metal. It is possible for the baseplates to be formed from the same sheet metal as that of the remainder of the sleeper, for example by folding back the ends of the sleeper preform to form a pair of flat surfaces, but in the preferred design, the baseplate is formed from sheet metal that is thicker than that forming the remainder of the sleeper.
- the baseplates may be formed from steel having a thickness of from 12 to 15mm while the remainder may be formed from steel having a thickness in the range of 8 to 12mm.
- a sleeper 1 according to the present invention comprises a base 2 that spans the distance between the rails (one such rail 3 being shown in phantom), and a pair of baseplates 4 and 5 that are located at either end of the base 2.
- the base 2 is curved to form a segment of a circle of radius 1.22m which corresponds to the internal radius of the tunnel in which the sleeper will be used.
- Each baseplate 4 and 5 is generally in the shape of an upturned U having one side arm 6 that is longerthan the other side arm 6' so that the central part 7 thereof that forms a base for the rails between two locating ribs 8 and 9 will be horizontal.
- a supporting rib 10 is formed in the steel sheet forming the base 2 of the sleeper beneath the central part 7 of each baseplate 4 and 5 so that is apex abuts the under surface of the central part and is directly below the centre of the rail placed on the baseplate.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
- This invention relates to railway sleepers When track is laid in tunnels, it is conventional to lay sleepers across the tunnel so that the ends of the sleepers bear on the tunnel wall, and to locate a pad at the end of each sleeper in order to distribute stress applied by the sleeper on the tunnel wall. We have found, however, that the stress exerted on the wall can still lead to damage of the wall.
- According to the present invention, there is provided a railway sleeper having an under surface that is curved in order to enable the sleeper to be positioned in a tunnel so that a major part of the under surface is in contact with the tunnel wall.
- Preferably the sleeper is designed so that at least 75% of the under surface, and especially substantially the entire under surface, is capable of bearing on the tunnel wall in use. This has the advantage thatthe stresses applied by the sleeper on the tunnel wall are substantially reduced with respect to existing designs, with consequential reduction or even elimination of damage to the tunnel wall by the sleeper.
- The sleeper may conveniently be formed from sheet metal. In such a case the central part of the sleeper, spanning the rails in use is preferably formed from a single strip of sheet metal that is curved to lie flat on the tunnel wall. This construction has the advantage that it has a very low profile in the central part of the sleeper and exhibits little or no obstruction for example to personnel walking along the track. The sleepers can have a relatively low weight and can easily be transported, installed and removed.
- Normally a baseplate for a rail of the track wi II be provided in the region of each of the sleeper, the baseplate preferably also being formed from sheet metal. It is possible for the baseplates to be formed from the same sheet metal as that of the remainder of the sleeper, for example by folding back the ends of the sleeper preform to form a pair of flat surfaces, but in the preferred design, the baseplate is formed from sheet metal that is thicker than that forming the remainder of the sleeper. For example the baseplates may be formed from steel having a thickness of from 12 to 15mm while the remainder may be formed from steel having a thickness in the range of 8 to 12mm.
- One form of sleeper in accordance with the present invention wi now be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 is a side elevation of the sleeper; and
- Figure 2 is a top plan view of the sleeper.
- Referring to the accompanying drawings a sleeper 1 according to the present invention comprises a
base 2 that spans the distance between the rails (one such rail 3 being shown in phantom), and a pair ofbaseplates 4 and 5 that are located at either end of thebase 2. Thebase 2 is curved to form a segment of a circle of radius 1.22m which corresponds to the internal radius of the tunnel in which the sleeper will be used. Eachbaseplate 4 and 5 is generally in the shape of an upturned U having one side arm 6 that is longerthan the other side arm 6' so that thecentral part 7 thereof that forms a base for the rails between two locatingribs - A supporting
rib 10 is formed in the steel sheet forming thebase 2 of the sleeper beneath thecentral part 7 of eachbaseplate 4 and 5 so that is apex abuts the under surface of the central part and is directly below the centre of the rail placed on the baseplate. By this means the load on the rail is transferred to thebase 2 via thearms 6 and 7 of the baseplates and the supportingrib 10, and is transferred to the tunnel floor over substantially the entire undersurface of thesleeper base 2.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929226651A GB9226651D0 (en) | 1992-12-22 | 1992-12-22 | Railway sleeper |
GB9226651 | 1992-12-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0604202A2 true EP0604202A2 (en) | 1994-06-29 |
EP0604202A3 EP0604202A3 (en) | 1994-08-31 |
Family
ID=10726977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93310399A Withdrawn EP0604202A2 (en) | 1992-12-22 | 1993-12-21 | Railway sleeper |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0604202A2 (en) |
GB (2) | GB9226651D0 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE598188C (en) * | 1934-06-07 | Kurt Wiesinger | Rolling forced run for rail vehicles |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR927823A (en) * | 1942-02-14 | 1947-11-11 | Railway sleepers and other parts of prestressed reinforced concrete; method and apparatus for manufacturing such parts | |
AU534253B2 (en) * | 1979-11-27 | 1984-01-12 | Omark Industries, Inc. | Steel rail sleeper |
-
1992
- 1992-12-22 GB GB929226651A patent/GB9226651D0/en active Pending
-
1993
- 1993-12-21 GB GB9326058A patent/GB2273728B/en not_active Expired - Fee Related
- 1993-12-21 EP EP93310399A patent/EP0604202A2/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE598188C (en) * | 1934-06-07 | Kurt Wiesinger | Rolling forced run for rail vehicles |
Non-Patent Citations (1)
Title |
---|
BAUMASCHINE + BAUTECHNIK - BMT, vol.33, no.10, October 1986, WIESBADEN DE pages 447 - 450 SCHLICK H. 'Gleisförderung imTunnelbau' * |
Also Published As
Publication number | Publication date |
---|---|
GB2273728A (en) | 1994-06-29 |
GB9226651D0 (en) | 1993-02-17 |
GB9326058D0 (en) | 1994-02-23 |
EP0604202A3 (en) | 1994-08-31 |
GB2273728B (en) | 1995-12-06 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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PUAL | Search report despatched |
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17P | Request for examination filed |
Effective date: 19950117 |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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17Q | First examination report despatched |
Effective date: 19960920 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT DE FR IT PT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19970506 |