1、BSI Standards Publication Railway applications Track Survey of track geometry quality PD CEN/TR 16513:2014National foreword This Published Document is the UK implementation of CEN/TR 16513:2014. The UK participation in its preparation was entrusted to Technical Committee RAE/2, Railway Applications
2、Track. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by B
3、SI Standards Limited 2014 ISBN 978 0 580 77867 4 ICS 93.100 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 April 2014. Amendments/corrigenda issued since
4、publication Date Text affected PUBLISHED DOCUMENT PD CEN/TR 16513:2014 TECHNICAL REPORT RAPPORT TECHNIQUE TECHNISCHER BERICHT CEN/TR 16513 March 2014 ICS 93.100 English Version Railway applications - Track - Survey of track geometry quality Applications ferroviaires - Voie - Analyse de la qualit de
5、la gomtrie de la voie Bahnanwendungen - Oberbau - berblick ber die geometrische Gleislagequalitt This Technical Report was approved by CEN on 18 May 2013. It has been drawn up by the Technical Committee CEN/TC 256. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia,
6、 Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Unite
7、d Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/
8、TR 16513:2014 E PD CEN/TR 16513:2014Contents Page Foreword 3 1 Scope 4 2 Terms and definitions . 4 3 Symbols and abbreviations 4 4 Methodology . 5 4.1 General considerations and confidentiality 5 4.2 Collected data 5 4.2.1 Scope of survey . 5 4.2.2 Speed classes applied 5 4.2.3 Calculation of standa
9、rd deviation 6 4.2.4 Calculation of cumulative frequency distributions 6 4.3 Data processing . 6 5 Participating networks and involvement . 6 5.1 Participating networks 6 5.2 Sample size of track data 7 6 Results 7 6.1 Results for standard deviation of longitudinal level 7 6.2 Results for standard d
10、eviation of alignment 9 6.3 Observation on results 11 7 Application of the results to EN 13848-6 . 12 Annex A (informative) Tables for cumulative frequency distributions for average track quality of all participating networks 13 Annex B (informative) Spread of data collected 15 Bibliography 17 PD CE
11、N/TR 16513:2014CEN/TR 16513:2014 (E) 3 Foreword This document (CEN/TR 16513:2014) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject o
12、f patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 4 1 Scope CEN/TC 256/SC 1/WG 28 “Railway applications/Infrastructure/Track geometry quality“ conducted a survey of the geometric quality of track
13、 across European railway networks. This was to get an understanding and overview of the track geometry across Europe in order to support the definition of track geometric quality classes for the writing of EN 13848-6. This Technical Report describes the methodology used for the survey and gives the
14、results. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 track quality index TQI value that characterises track geometry quality of a track section based on parameters and measuring methods compliant with the EN 13848 series 2.2 track quality
15、 class TQC characterisation of track geometry quality as a function of speed and expressed as a range of TQIs 2.3 re-colouring algorithm which converts one signal into a different signal and which is used in the EN 13848 series to convert a chord measurement signal into a D1 or D2 measurement signal
16、 3 Symbols and abbreviations For the purposes of this document, the following symbols and abbreviations apply. Table 1 Symbols and abbreviations Symbol Designation Unit AL Alignment mm D1 Wavelength range 3 m 25 m m D2 Wavelength range 25 m 70 m m Wavelength m LL Longitudinal level mm QN1 50 % quali
17、ty level according to EN 14363:2005 mm QN2 90 % quality level according to EN 14363:2005 mm SD Standard deviation mm TQI Track Quality Index ETQS European track quality survey TQC Track Quality Class V Speed km/h NOTE In this Technical Report, “AL“ stands for “alignment” and is not to be confused wi
18、th AL standing for “alert limit” as defined in EN 13848-5. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 5 4 Methodology 4.1 General considerations and confidentiality The objective of the European track quality survey (ETQS) was to get an understanding and overview of the track geometry quality across
19、Europe assessed as standard deviations. In order to achieve this objective without an exchange of an enormous amount of raw data, an approach was agreed based on the evaluation of quality data of thirteen participating networks. The quality data of each network was provided in the form of cumulative
20、 frequency distributions of alignment and longitudinal level. Each of the participating networks provided quality data for a representative part of their network according to the technical specification described below in 4.2. With the help of a standardized inquiry form, the cumulative frequency di
21、stributions of the quality data were determined and were sent to the CEN/TC 256/SC 1/WG 28 clearing office. In order to make the data anonymous, the clearing office assigned a random network number to the quality data of each network and summarized the track geometry quality data in an anonymous com
22、parison table. This was supplied to CEN/TC 256/SC 1/WG 28 only. Without agreement of all participating networks neither the clearing office nor CEN/TC 256/SC 1/WG 28 may disclose or publish any of the quality data or the assignment between quality data and participating networks as a whole or in par
23、ts to anyone else. 4.2 Collected data 4.2.1 Scope of survey The survey collected data for all main lines, main tracks in stations and isolated switches or group of switches situated in plain line and run at line speed. All side tracks, station tracks or other less important tracks were excluded. The
24、 survey was based on measurements of track taken typically at 25 cm spacing which results in a large volume of data. For example, a network length of 10 000 km track would result in a cumulative frequency distribution comprising of over 40 million measuring points. The survey was conducted using the
25、 most recent measurement value for each location. This was summarized in a cumulative frequency distribution. Where it was not possible for a participating network to do the calculation over their whole network, the calculation was done for at least 5 % of the network while the track layout and trac
26、k quality considered in the sample had to be as representative as possible for the network. The track length considered for each speed class had to be quoted in the standardized inquiry form. 4.2.2 Speed classes applied The survey was done in five speed classes according to the EN 13848 series: 230
27、km/h V 300 km/h 160 km/h V 230 km/h 120 km/h V 160 km/h 80 km/h V 120 km/h V 80 km/h Speeds higher than 300 km/h were not taken into account due to the lack of sufficient data. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 6 In order to ensure anonymity of networks with high speed tracks, the network le
28、ngths of the participating networks were not disclosed in the final comparison table. They were just used as weighting factors to calculate a European Track Quality. 4.2.3 Calculation of standard deviation The survey was done using standard deviations of longitudinal level SD LL and alignment SD AL
29、in the domain D1 (3 m 25 m) in accordance with EN 13848-1. Where the origin of the measurement data was chord based, they were re-coloured to obtain D1. Data of left and right rail were combined as a mean of the standard deviations of each rail as follows: , SD SD SD LL left LL right LL 2 + = (1) ,
30、SD SD SD AL left AL right AL + = 2(2) The calculation of the standard deviation was specified as follows: calculation length: 200 m to 250 m; calculation step: preferably at every measurement databreak, e.g. 0,25 m. If not possible, a calculation step up to 250 m may be chosen. Slightly different de
31、finitions of standard deviations were allowed if it was proven that the statistical influence on the cumulative frequency was small. 4.2.4 Calculation of cumulative frequency distributions Once these parameters had been calculated the cumulative frequency distribution was determined in steps of 0,01
32、 mm for each speed class. 4.3 Data processing The cumulative frequency distributions of all participating networks for the five speed classes were produced and a weighted average was calculated for each step of the frequency distribution. The line length of each participating network in the consider
33、ed speed class was used as weighting factor. In this way European Track Quality distributions were determined for the five speed classes and both SD LL and SD AL. These cumulative frequency distributions are represented in Figures 1 and 3 and in Table A.1. 5 Participating networks and involvement 5.
34、1 Participating networks The following alphabetic list gives the networks that provided data to the survey: Austria BB Infrastruktur Belgium Infrabel Czech Republic SZDC Denmark Rail Net Denmark Finland FTA France SNCF / RFF Germany DB Netz PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 7 Italy RFI Nethe
35、rlands ProRail Portugal REFER Switzerland SBB Sweden Trafikverket United Kingdom Network Rail 5.2 Sample size of track data The survey comprised data for approximately 60 000 km of track. This represents a 37 % sample of the participating networks. The total track length of all the participating net
36、works is about 160 000 km, this is more than half of the track length of the European Union member states. Some networks provided data for nearly all the lines, others provided smaller samples. In any case, they have been chosen carefully as representative for the speed class in the whole network. T
37、able 2 shows the coverage of the individual speed classes related to the respective track length. Table 2 Sample size of track data for each speed class Speed range Network length Sample size Percentage 230 km/h V 300 km/h 6 368,3 km 3 237,0 km 45 % 160 km/h V 230 km/h 16 631,9 km 7 554,1 km 45 % 12
38、0 km/h V 160 km/h 68 548,5 km 17 357,6 km 25 % 80 km/h V 120 km/h 36 012,5 km 16 643,1 km 46 % V 80 km/h 31 959,5 km 14 897,8 km 47 % 6 Results 6.1 Results for standard deviation of longitudinal level The distributions of the standard deviation of longitudinal level for each speed class are given in
39、 Figure 1. A detailed table can be found in Annex A. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 8 Figure 1 ETQS results for longitudinal level SD LL The spread of the 90 % values of longitudinal level for participating networks is given in the following figure (Figure 2). The spread of the 50 % value
40、s is given in Annex B. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 9 Figure 2 Spread of 90 % percentile for longitudinal level SD LL 6.2 Results for standard deviation of alignment The distributions of the standard deviation of alignment for each speed class are given in the following figure (Figure 3
41、). A detailed table can be found in Annex A. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 10 Figure 3 ETQS results for alignment SD AL The spread of the 90 % values of alignment for participating networks is given in the following figure (Figure 4). The spread of the 50 % values is given in Annex B. PD
42、 CEN/TR 16513:2014CEN/TR 16513:2014 (E) 11 Figure 4 Spread of 90 % percentile for alignment SD AL 6.3 Observation on results As expected, track quality improves with speed class. This can be observed for both longitudinal level and alignment. The spread of track quality (90 % value of the distributi
43、on of standard deviations) between different networks is wider for low speeds (V 230 km/h). This can be observed for both longitudinal level and alignment. For a given speed class, this spread is also wider for longitudinal level than for alignment. When comparing the survey results with QN1 and QN2
44、 levels, it was found that: for most speed classes, QN1 and QN2 do not match the 50 % and 90 % values of the corresponding distributions for both alignment and longitudinal level (see Figures 1 and 3); for all speed classes up to 230 km/h, QN2 is lower than the 90 % values of the SD LL distribution,
45、 however they are within 20 % except for lines up to and including 80 km/h (see Figure 1); for all speed classes, the 50 % values of the SD LL distribution are better than QN1 levels (see Figure 1); for all speed classes above 80 km/h, the 50 % values of the SD AL distribution are better than QN1 le
46、vels (see Figure 3), it is not practical to have a realistic track quality distribution that fits both QN1 and QN2. This is due to the closeness of their values. Positioning QN1 and QN2 on the cumulative frequency distributions for all speed ranges leads to results presented in Table 3. PD CEN/TR 16
47、513:2014CEN/TR 16513:2014 (E) 12 Table 3 Track length for QN levels Length for SD LL Length of SD AL km % km % QN1 108 380 68 124 591 79 QN1 QN2 31 477 20 15 048 9 Sum 159 521 100 159 520 100 7 Application of the results to EN 13848-6 The definition of the TQCs in EN 13848-6 is based on the cumulati
48、ve distribution of the weighted average of all the networks participating in the European track quality survey. The five TQCs are defined as follows: Class A below 10 % of the distribution corresponding to the best 10 %; Class B between 10 % and 30 % of the distribution; Class C between 30 % and 70
49、% of the distribution; Class D between 70 % and 90 % of the distribution; Class E above 90 % of the distribution corresponding to the worst 10 %. PD CEN/TR 16513:2014CEN/TR 16513:2014 (E) 13 Annex A (informative) Tables for cumulative frequency distributions for average track quality of all participating networks Table A.1 ETQs results for longitudinal level SD LL and alignment SD AL SD LL mm V 80 km/h (80 V 120) km/h (120 V 160) km/h (160 V 230) km
