Rehabilitation of Railway Track Quality in Relation to Diagnostic Data

2021 ◽  
pp. 197-206
Author(s):  
Janka Šestáková ◽  
Andrej Matejov ◽  
Alžbeta Pultznerová
Keyword(s):  
Railway Track ◽  
Diagnostic Data ◽  
Track Quality

scholarly journals Data-Driven Bias Correction and Defect Diagnosis Model for In-Service Vehicle Acceleration Measurements

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 872 ◽  
Author(s):  
Lei Bai ◽  
Rengkui Liu ◽  
Qing Li
Keyword(s):  
Bias Correction ◽  
False Positive ◽  
Measurement Data ◽  
Data Driven ◽  
Railway Track ◽  
Proposed Model ◽  
Vehicle Acceleration ◽  
Defect Diagnosis ◽  
Quality Instruments ◽  
Track Quality

Track quality instruments use low-cost accelerometers placed on or attached to the floors of operating trains, and these instruments collect substantial amounts of data over short inspection periods. The measurements collected by the instruments are the main data source for track irregularity evaluation. However, considerable measurement bias exists in the vertical and lateral vibration data obtained from such instruments. False positive track vibration defects detected by track quality instruments occur frequently. This results in considerable time and effort being expended needlessly because maintenance workers have to visit the railway track sites to check and review the track vibration defects. Therefore, we propose a model for data-driven bias correction and defect diagnosis for in-service vehicle acceleration measurements based on track degradation characteristics. Substantial amounts of historical track measurement data from different inspection methods were mined extensively to eliminate the false positive detection of track vibration defects and diagnose the causes of track vibration defects. Actual measurement data from the Lanxin Railway were used to validate our proposed model. The success rate achieved in identifying false positive track vibration defects was 84.1%, and that in track vibration defect diagnosis was 75.8%. These high success rates suggest that the proposed model can be of practical use in improving railway track maintenance management.

Railway Track Quality Assessment Method Based on Mechanism Modeling

ICTIS 2011 ◽  
2011 ◽  
Author(s):  
Yong Qin ◽  
Wei Wei ◽  
Zong-yi Xing ◽  
Li-min Jia ◽  
Xiaoqing Chen
Keyword(s):  
Quality Assessment ◽  
Assessment Method ◽  
Railway Track ◽  
Quality Assessment Method ◽  
Mechanism Modeling ◽  
Track Quality

scholarly journals Condition monitoring of railway track systems by using acceleration signals on wheelset axle-boxes

Transport ◽  
2017 ◽  
Vol 33 (2) ◽  
pp. 555-566 ◽  
Author(s):  
Andrzej Chudzikiewicz ◽  
Roman Bogacz ◽  
Mariusz Kostrzewski ◽  
Robert Konowrocki
Keyword(s):  
Service Use ◽  
Preliminary Investigation ◽  
Measurement Data ◽  
Cost Effective ◽  
Railway Track ◽  
Track Condition ◽  
Preliminary Preparation ◽  
Multiple Unit ◽  
Acceleration Signals ◽  
Track Quality

The aim of this paper is to demonstrate the possibilities of estimating the track condition using axle-boxes and car-bodies motions described by acceleration signals. In the paper, the results presented indicate the condition of tracks obtained from the preliminary investigation on the test track. Furthermore, the results from the supervised runs (on Polish Railway Lines) of Electric Multiple Unit (EMU-ED74) with the prototype of track quality monitoring system installed on-board are described. As Track Quality Indicator (TQI) algorithm, used in the mentioned prototype, a modified Karhunen–Loève transformation is used in preliminary preparation of acceleration signals. The transformation is used to extract the principal dynamics from measurement data. Obtained results are compared to other methods of evaluating the geometrical track quality, namely methods, which apply the synthetic coefficient Jsynth and five parameters of defectiveness W5. The results from the investigation showed that track condition estimation is possible with acceptable accuracy for in-service use and for defining cost-effective maintenance strategies.

Repeated-load response of aggregates in relation to track quality index

1994 ◽  
Vol 31 (4) ◽  
pp. 547-554 ◽  
Author(s):  
Gerald P. Raymond ◽  
Richard J. Bathurst
Keyword(s):  
Large Scale ◽  
Railway Track ◽  
Triaxial Tests ◽  
Repeated Loading ◽  
Published Data ◽  
Load Response ◽  
Trade Offs ◽  
Aggregate Index ◽  
Repeated Load ◽  
Track Quality

Track quality rating systems are briefly introduced as a background for undertaking a study of the repeated-load response of ballast aggregates. The results from a number of different laboratory investigations are reviewed and this data interpreted in terms of track quality behaviour. The paper reviews selected results from repeated-load triaxial tests used to investigate the repeated-loading response of different granular railway ballasts at stress levels comparable with those below North America heavy freight axle loads. These results are used to establish an aggregate index to predict deformation and breakdown of ballast under repeated loading. Large-scale test programs are reviewed that relate aggregate quality to simulated ballasted track formation response using a 0.9 m long by 250 mm wide tie to represent a typical loaded rail seat. The large-scale testing was restricted to one aggregate that was subjected to a range of load levels and artificial subgrade stiffness. Similar related work on coarse, single-sized aggregates recommended for drainage layers in highway pavements is reviewed to illustrate the trade-offs between support compressibility and quality of aggregate defined by the aggregate index value. The laboratory tests and model performance are compared with published data to establish a laboratory performance rating in the form of an aggregate index for prediction of those track quality indices that relate to deformation as a function of aggregate type. Key words : ballast, aggregate, hardness, toughness, railway, track quality.

scholarly journals GELEŽINKELIO KELIO GEOMETRINIŲ PARAMETRŲ DINAMIKOS TYRIMAS TAIKANT KELIO KOKYBĖS INDEKSĄ / RAILWAYS GEOMETRICAL PARAMETERS DYNAMICS INVESTIGATION BY TRACK QUALITY INDEX

2018 ◽  
Vol 10 (0) ◽  
pp. 1-7
Author(s):  
Vytautas Motiejus Bubnelis ◽  
Benas Slepakovas ◽  
Laura Černiauskaitė ◽  
Henrikas Sivilevičius
Keyword(s):  
Quality Index ◽  
Rail Transport ◽  
Geometric Parameters ◽  
Railway Track ◽  
Geometrical Parameters ◽  
Track Geometry ◽  
Track Condition ◽  
Over Time ◽  
Track Quality

Rail transport, in competition with other modes of transport, has to improve the quality of passenger and freight transport. In order to carry passengers and goods quickly, efficiently and safely, it is necessary take maintenance railways so that their geometric parameters do not exceed the tolerances. About real railway track condition, the data is obtained by track geometry recording car, measuring seven geometric parameters dispersion. This paper presents the methodology for determining and estimating the geometric parameters of the track geometry, which shows that the track quality index (TQI) is the sum of the variance of seven geometric parameters. Experimental research on the two-track A (8km) and B (11km) a three-year period (2015-2017) for all 12-month KKI, establish their quality dynamics (change over time). These data indicate that the quality of the analyzed sections A and B was good, but due to the increasing mass (in megatons) of transported loads, there is a tendency to deteriorate. Santrauka Geležinkelių transportas, konkuruodamas su kitomis transporto rūšimis, privalo gerinti keleivių ir krovinių vežimų kokybę. Norint greitai, efektyviai ir saugiai vežti keleivius ir krovinius, būtina taip prižiūrėti geležinkelių kelius, kad jų geometrinių parametrų nuokrypiai neviršytų leidžiamųjų nuokrypių. Apie tikrąją geležinkelių kelio būklę duomenys gaunami kelmačiu išmatavus septynių geometrinių parametrų sklaidą. Šiame darbe pateikta geležinkelio kelio geometrinių parametrų sklaidos nustatymo ir vertinimo metodika, kurioje įrodyta, kad kelio kokybės indeksas (KKI) yra septynių geometrinių parametrų dispersijų suma. Eksperimentiškai ištyrus dviejų geležinkelio kelių A (8 km) ir B (11 km) trijų metų laikotarpiu (nuo 2015 iki 2017 metų) visų 12 mėnesių KKI, nustatyta jų kokybės dinamika (kaita bėgant laikui). Šie duomenys rodo, kad ištyrinėtų A ir B ruožų kelio kokybė buvo gera, bet dėl didėjančios pervežtų krovinių suminės masės (megatonų skaičiaus) turi tendenciją blogėti.

Combining Track Quality and Performance Measures to Assess Track Maintenance Requirements

2015 ◽  
Author(s):  
Alireza Roghani ◽  
Renato Macciotta ◽  
Michael Hendry
Keyword(s):  
Railway Track ◽  
Threshold Values ◽  
Track Geometry ◽  
Track Maintenance ◽  
Different Types ◽  
Track Stiffness ◽  
And Performance ◽  
Maintenance Requirements ◽  
The Relationship ◽  
Track Quality

The serviceability of a section of railway highly depends on track stiffness and roughness. Railway operators regularly measure parameters associated with track stiffness and roughness to evaluate the track conditions. These measures are used in combination with performance observations to assess maintenance requirements. Although these assessments are mostly qualitative, railway operations have benefited from them. Railway operators keep comprehensive records of different types of track defects along their lines. These records are a measure of track performance and present an opportunity to quantify the relationship between track quality and performance. This brings the possibility of developing a performance-based approach for assessing the maintenance requirement along a railway track. In this paper, a database of track geometry defects along Canadian National Railway’s Lac la Biche subdivision (Alberta) has been compared against measured parameters associated with track roughness and stiffness. The analyses confirm the relationship between track stiffness and roughness, and the occurrence of track defects. This relationship is further used to define threshold values of track roughness and stiffness, and a hazard chart for maintenance requirements along the Lac la Biche subdivision is proposed.

Sign in / Sign up

Export Citation Format

Share Document