Title of Invention	A FIXED TRACK AND A METHOD FOR MONITORING THE STATE OF THE SUB STRUCTURE OF FIXED TRACKS
Abstract	A FIXED TRACK AND A METHOD FOR MONITORING THE STATE OF THE SUBSTRUCTURE OF FIXED TRACK The invention relates to a fixed track with substructure supporting plates (1) supporting a track plate (2), characterized in that for monitoring the state of the substructure of the fixed track at the ends (4, 5) of the substructure supporting plates (1) measuring bolts (6) are fastened, which in vertical recesses (7) pass freely through said track plate (2). The invention also relates to a method for monitoring the state of the substructure of a fixed track.

Title of Invention

A FIXED TRACK AND A METHOD FOR MONITORING THE STATE OF THE SUB STRUCTURE OF FIXED TRACKS

Abstract

A FIXED TRACK AND A METHOD FOR MONITORING THE STATE OF THE SUBSTRUCTURE OF FIXED TRACK The invention relates to a fixed track with substructure supporting plates (1) supporting a track plate (2), characterized in that for monitoring the state of the substructure of the fixed track at the ends (4, 5) of the substructure supporting plates (1) measuring bolts (6) are fastened, which in vertical recesses (7) pass freely through said track plate (2). The invention also relates to a method for monitoring the state of the substructure of a fixed track.

Full Text	The invention relates to a fixed track and a method for monitoring the state of the substructure of fixed track, especially in the transition region of substructure supporting plates. Constant monitoring of the support conditions of fixed tracks is required for evaluating the stresses on the fixed track system and for determining possible deviations of specified geometries in the area of massive substructures, for example, of bridges or supports. In particular, the transitions between the support plate elements, functioning as substructure of the fixed track, are regarded as critical sites in this connection. Track transitions at constructional work, such as bridges and tunnels, are further points at which monitoring procedures should be concentrated. It is therefore an object of the invention to provide a fixed track and a method for achieving simple monitoring of the state of the substructure especially in these critical transition regions so that, for example, a breaking away of the edges of the substructure plates can be recognized in good time and, if necessary, repairs be made. Pursuant to the invention, this objective is accomplished owing to the fact that measuring bolts, which protrude beyond the track plate and, in vertical recesses, pass freely through the track plate above, are fastened at the ends of the substructure plates, which are to be monitored. The measuring bolts may be introduced into the substructure plate before the track plate is mounted or also be installed in the substructure plate through subsequently provided boreholes after the fixed track is finished. Monitoring rides with measuring vehicles, which are equipped with a laser scanning device for determining the height offset of the measuring bolts, are employed to monitor the substructure state of a fixed track with such a device. If it is ensured from the very start that all measuring bolts protrude precisely by a specified amount beyond the track plate, each deviation in the height of the measuring bolt from this nominal height can be used as an absolute criterion for a change in the state of the substructure plate. However, since such a possibility can hardly be adhered to in practice, the height offset of each measuring bolt from a preceding measurement is used for monitoring rides and the change in height Ah of the substructure plate in comparison to the fixed track plate is determined separately for each measuring bolt. Further advantages, distinguishing features and details of the invention arise out of the following description of an example, as well as from the drawing, in which Figure 1 shows a diagrammatic section through a fixed track with discrete substructure plates, similar to those which occur particularly in the transition region at constructional work, such as bridges and tunnels, and Figure 2 shows an enlarged section II in the region of a measurement bolt. Figure 1 shows a substructure supporting plate 1, on which a fixed track plate 2 is mounted, which, in turn, carries the continuous rails 3. In order to be able to monitor the critical transition region between two track supporting plates 1, especially in the region of the track transitions at constructional work, such as bridges and tunnels, or at another transitions, as easily as possible, measuring bolts 6 fastened at the ends 4, 5 of the supporting plates 1. In turn, the measuring bolts 6 pass through the track plate 2 above a vertical recesses 7 and protrude the fixed track plate preferably by a small amount. The height if the tip of each measuring bolt 7 can be determined very easily during morning rides with the help of a laser measuring system. Preferably, any height change in the substructure plate 1 can be ascertained very easily preferably by determining the change in height Ah from a previous measurement. The measuring bolt 6 can be installed in the substructure plate 1 before the track plate 2 is mounted as well as after the fixed track is finished, in which case a borehole 7 is subsequently produced in the substrate plate 1. WE CLAIM: 1. A fixed track with substructure supporting plates (1) supporting a track plate (2), characterized in that for monitoring the state of the substructure of the fixed track at the ends (4, 5) of the substructure supporting plates (1) measuring bolts (6) are fastened, which in vertical recesses (7) pass freely through said track plate (2). 2. The fixed track as claimed in claim 1, wherein the measuring bolts (6) protrude beyond the track plate (2) by a precisely specified amount. 3. The fixed track as claimed in claim 1 or 2, wherein the measuring bolt (6) are accommodated before the track plate (2) is mounted in the substructure plate (1). 4. The fixed track as claimed in claim 1 or 2, wherein after the fixed track is finished, the measuring bolts (6) are installed in the substructure plate (1) through boreholes subsequently provided. 5. A method for monitoring the state of the substructure of a fixed track as claimed in any one of the claims 1 to 3, characterized in that the height offset of the measuring bolts is determined by monitoring rides with a measuring vehicle with a height-detection device, especially a laser scanning device. 6. The method as claimed in claim 5, wherein the difference in height Ah of each measuring bolt from a previous measurement is determined during each monitoring ride.

Full Text

The invention relates to a fixed track and a method for monitoring the state of the substructure of fixed track, especially in the transition region of substructure supporting plates.
Constant monitoring of the support conditions of fixed tracks is required for evaluating the stresses on the fixed track system and for determining possible deviations of specified geometries in the area of massive substructures, for example, of bridges or supports. In particular, the transitions between the support plate elements, functioning as substructure of the fixed track, are regarded as critical sites in this connection. Track transitions at constructional work, such as bridges and tunnels, are further points at which monitoring procedures should be concentrated.
It is therefore an object of the invention to provide a fixed track and a method for achieving simple monitoring of the state of the substructure especially in these critical transition regions so that, for example, a breaking away of the edges of the substructure plates can be recognized in good time and, if necessary, repairs be made.
Pursuant to the invention, this objective is accomplished owing to the fact that measuring bolts, which protrude beyond the track plate and, in vertical recesses, pass freely through the track plate above, are fastened at the ends of the substructure plates, which are to be monitored.

The measuring bolts may be introduced into the substructure plate before the track plate is mounted or also be installed in the substructure plate through subsequently provided boreholes after the fixed track is finished.
Monitoring rides with measuring vehicles, which are equipped with a laser scanning device for determining the height offset of the measuring bolts, are employed to monitor the substructure state of a fixed track with such a device.
If it is ensured from the very start that all measuring bolts protrude precisely by a specified amount beyond the track plate, each deviation in the height of the measuring bolt from this nominal height can be used as an absolute criterion for a change in the state of the substructure plate. However, since such a possibility can hardly be adhered to in practice, the height offset of each measuring bolt from a preceding measurement is used for monitoring rides and the change in height Ah of the substructure plate in comparison to the fixed track plate is determined separately for each measuring bolt.
Further advantages, distinguishing features and details of the invention arise out of the following description of an example, as well as from the drawing, in which
Figure 1 shows a diagrammatic section through a fixed track with discrete
substructure plates, similar to those which occur particularly in the transition region at constructional work, such as bridges and tunnels, and
Figure 2 shows an enlarged section II in the region of a measurement bolt.
Figure 1 shows a substructure supporting plate 1, on which a fixed track plate 2 is mounted, which, in turn, carries the continuous rails 3.

In order to be able to monitor the critical transition region between two track supporting plates 1, especially in the region of the track transitions at constructional work, such as bridges and tunnels, or at another transitions, as easily as possible, measuring bolts 6 fastened at the ends 4, 5 of the supporting plates 1. In turn, the measuring bolts 6 pass through the track plate 2 above a vertical recesses 7 and protrude the fixed track plate preferably by a small amount. The height if the tip of each measuring bolt 7 can be determined very easily during morning rides with the help of a laser measuring system. Preferably, any height change in the substructure plate 1 can be ascertained very easily preferably by determining the change in height Ah from a previous measurement.
The measuring bolt 6 can be installed in the substructure plate 1 before the track plate 2 is mounted as well as after the fixed track is finished, in which case a borehole 7 is subsequently produced in the substrate plate 1.

WE CLAIM:
1. A fixed track with substructure supporting plates (1) supporting a track plate (2),
characterized in that for monitoring the state of the substructure of the fixed track at the ends
(4, 5) of the substructure supporting plates (1) measuring bolts (6) are fastened, which in
vertical recesses (7) pass freely through said track plate (2).
2. The fixed track as claimed in claim 1, wherein the measuring bolts (6) protrude
beyond the track plate (2) by a precisely specified amount.
3. The fixed track as claimed in claim 1 or 2, wherein the measuring bolt (6) are
accommodated before the track plate (2) is mounted in the substructure plate (1).
4. The fixed track as claimed in claim 1 or 2, wherein after the fixed track is finished, the measuring bolts (6) are installed in the substructure plate (1) through boreholes subsequently provided.
5. A method for monitoring the state of the substructure of a fixed track as claimed in any one of the claims 1 to 3, characterized in that the height offset of the measuring bolts is determined by monitoring rides with a measuring vehicle with a height-detection device, especially a laser scanning device.
6. The method as claimed in claim 5, wherein the difference in height Ah of each
measuring bolt from a previous measurement is determined during each monitoring ride.

Documents:

0804-chenp-2005 abstract-duplicate.pdf

0804-chenp-2005 abstract.jpg

0804-chenp-2005 assignment.pdf

0804-chenp-2005 claims-duplicate.pdf

0804-chenp-2005 description (complete)-duplicate.pdf

0804-chenp-2005 drawings-duplicate.pdf

0804-chenp-2005 form-6.pdf

0804-chenp-2005 pct search report.pdf

0804-chenp-2005 petition.pdf

804-chenp-2005-abstract.pdf

804-chenp-2005-claims.pdf

804-chenp-2005-correspondnece-others.pdf

804-chenp-2005-correspondnece-po.pdf

804-chenp-2005-description(complete).pdf

804-chenp-2005-drawings.pdf

804-chenp-2005-form 1.pdf

804-chenp-2005-form 18.pdf

804-chenp-2005-form 26.pdf

804-chenp-2005-form 3.pdf

804-chenp-2005-form 5.pdf

804-chenp-2005-pct.pdf

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Patent Number

217292

Indian Patent Application Number

804/CHENP/2005

PG Journal Number

21/2008

Publication Date

23-May-2008

Grant Date

26-Mar-2008

Date of Filing

02-May-2005

Name of Patentee

PFLEIDERER INFRASTRUKTURTECHNIK GMBH & CO. KG

Applicant Address

Ingolstadter Strasse 51, D-92318 Neumarkt,

Inventors:

#	Inventor's Name	Inventor's Address
1	KLEEBERG Jens	Ursula Strasse 28, D-90480 Nurnberg,

PCT International Classification Number

G01C 15/00

PCT International Application Number

PCT/EP2003/010886

PCT International Filing date

2003-10-01

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	102 46 312.3	2002-10-04	Germany