• Title/Summary/Keyword: Ballast deterioration

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A study on the Dynamic Behaviors of Track due to Deterioration characteristics of Ballast (자갈도상의 노후화에 따른 궤도구조의 동적거동에 관한 연구)

  • Park Yong-Gul;Choi Jung-Youl;Kang Duck Man
    • Proceedings of the KSR Conference
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    • 2005.05a
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    • pp.591-596
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    • 2005
  • The major objective of this study is to investigate the dynamic behaviors of track due to the deterioration characteristics of ballast for servicing tracks by the field test. The durability of ballast plays an important role in the track behaviour. To estimate the deterioration characteristics of ballast, several tests have been carried out by several shcolars. The deterioration characteristics of ballast is one of the most important factor in the dynamic behaviour of track and its life. In this paper abrasion/breakage characteristics of ballast is studied to predict the effect of physical ballast characteristics on ballast track. To reveal deterioration characteristics of ballast, the field test were carried out. The deterioration characteristics, studied in this paper, is applied to the dynamic behaviour of track in various conditions.

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A study on the Dynamic Behaviors of Track due to Deterioration characteristics of Ballast(II) (자갈도상의 노후화에 따른 궤도구조의 동적거동에 관한 연구(II))

  • Seo Su-Euen;Park Yong-Gul;Choi Jung-Youl
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.854-859
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    • 2005
  • The major objective of this study is to investigate the dynamic behaviors of track due to the deterioration characteristics of ballast for servicing tracks by the field test. The durability of ballast plays an important role in the track behaviour. To estimate the deterioration characteristics of ballast, several tests have been carried out by several shcolars. The deterioration characteristics of ballast is one of the most important factor in the dynamic behaviour of track and its life. In this paper abrasion/breakage characteristics of ballast is studied to predict the effect of physical ballast characteristics on ballast track. To reveal deterioration characteristics of ballast, the field test were carried out. The deterioration characteristics, studied in this paper, is applied to the dynamic behaviour of track in various conditions.

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A Study on the Dynamic Behaviors of Ballast Track using Field Test (현장측정을 통한 자갈도상궤도의 동적 거동 분석)

  • Park Yong-Gul;Choi Jung-Youl
    • Journal of the Korean Society for Railway
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    • v.9 no.4 s.35
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    • pp.401-411
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    • 2006
  • The major objective of this study is to investigate the dynamic behaviors of track due to the deterioration characteristics of ballast for servicing tracks by the field test. The durability of ballast plays an important role in the track behaviour. To estimate the deterioration characteristics of ballast, several tests have been carried out by several scholars. The deterioration characteristics of ballast is one of the most important factor in the dynamic behaviour of track and its life. In this paper abrasion/breakage characteristics of ballast is studied to predict the effect of physical ballast characteristics on ballast track. To reveal deterioration characteristics of ballast, the field test were carried out. The deterioration characteristics, studied in this paper, is applied to the dynamic behaviour of track in various conditions.

A Study on the Dynamic Behaviors of Ballast Track using Field Test (현장측정을 통한 자갈도상 궤도의 동적 거동 분석)

  • Choi, Jung-Youl;Park, Kyun-Seo;Ryu, Joong-Youl;Park, Jeong-Gun;Ryu, Kyoung-Sik;Park, Yong-Gul
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.494-507
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    • 2006
  • The major objective of this study is to investigate the dynamic behaviors of track due to the deterioration characteristics of ballast for servicing tracks by the field test. The durability of ballast plays an important role in the track behaviour. To estimate the deterioration characteristics of ballast, several tests have been carried out by several scholars. The deterioration characteristics of ballast is one of the most important factor in the dynamic behaviour of track and its life. In this paper abrasion/breakage characteristics of ballast is studied to predict the effect of physical ballast characteristics on ballast track. To reveal deterioration characteristics of ballast, the field test were carried out. The deterioration characteristics, studied in this paper, is applied to the dynamic behaviour of track in various conditions.

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A Study on the Crushing Characteristic of the Ballast Gravel at High-Speed Railroad (고속선 도상자갈의 파쇄특성에 관한 연구)

  • Lee, Choon-Kil;Kim, Nam-Hong;Woo, Byoung-Koo;Lee, Sung-Uk
    • Journal of the Korean Society for Railway
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    • v.11 no.4
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    • pp.384-389
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    • 2008
  • The ballast, one of track components, plays an essential role as intermedium in transmitting train load to subgrade safely, and the deterioration of ballast directly effects the growth of track irregularity. In this study, we determined the main factor of ballast deterioration was miniature of ballast gravel caused MTT (Multiple Tie Tamper) works and accumulated traffic loads. To estimate the deterioration characteristics of ballast, we carried out field test (Chap.2) through track construction for test and the model test (Chap.3) simulating the actual operation environment, have done a comparative analysis with the sample's result (crushing rate) of high-speed railroad running actually.

Breakage Characteristics of Ballast (도상자갈의 마모/파쇄 특성)

  • 정근영;김현기;이종득
    • Journal of the Korean Society for Railway
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    • v.2 no.3
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    • pp.61-69
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    • 1999
  • The durability of ballast plays an important role in track behaviour. To estimate the deterioration characteristics of ballast, several tests have been carried out by several scholars. The deterioration characteristics is very important factor in the behaviour of track and its life. In this paper, abrasion/breakage characteristics of ballast is studied to see the effect of physical ballast characteristics on ballast life. To reveal breakage characteristics of ballast, the ballast box test and the MTT field test were carried out. The breakage characteristics studied in this paper is applied to the ballast life prediction in various conditions, such as LA abrasion, annual tonnage, tamping number per year, etc

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The analysis of ballast abrasion and fracture by Multiple Tie Tamper (장비작업에 의한 도상자갈의 마모.파쇄변화에 관한 분석)

  • Lee, Choon-Kil;Kim, Kwan-Hyung
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1024-1028
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    • 2008
  • The ballast, one of track components, plays an essential role as intermedium in transmitting train load to subgrade safely, and the deterioration of ballast directly effects the growth of track irregularity. In this study, we determined the main factor of ballast deterioration was miniature of ballast gravel caused MTT(Multiple Tie Tamper) works and accumulated traffic loads. To estimate the deterioration characteristics of ballast, we carried out field test through track construction for test and the model test simulating the actual operation environment, have done a comparative analysis with the sample's result(crushing rate) of high-speed railroad running actually.

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Development of System Modules for Ballast Cleaning Management (도상자갈치기 대상관리 시스템 모듈 개발)

  • Kim, Nam-Hong;Lee, Syeung-Yeol;Woo, Byoung-Koo;Kim, Myung-Su;Lee, Sung-Uk
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.299-304
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    • 2010
  • We should manage the target locations according to the deterioration degree of the ballast for the rational and economical ballast cleaning. For this, it's required to define the logics calculating the crushing rates and suggest the threshold values for the ballast cleaning. This paper introduce the system modules that estimate the ballast's deterioration degree refers to the results of the previous study("A Study on the Crushing Characteristic of the Ballast Gravel at High-Speed Railroad", Journal of the Korean Society for Railway, Vol.11, No.4, pp.384~389), enroll the target locations where the ballast cleaning is required.

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A study on availability of GPR in estimating the condition of ballast (자갈도상 상태평가를 위한 GPR기법의 적용성 분석)

  • Lee, Choon-Kil;Kim, Nam-Hong;Woo, Byoung-Koo;Kim, Kwan-Hyung
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.494-499
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    • 2007
  • The ballast, one of a track components, plays an essential role as intermedium in transmitting train traffic-load to subgrade safely, and deterioration of ballast caused by cumulative load effects growth of track irregularity. Especially in the case of Gyeongbu high-speed railway, the deteriorating speed of ballast by dynamic vibration is faster than conventional line because KTX is longer than normal trains in length and it's velocity is very fast with high speed of 300km/h as well. In addition, ballast is a nonlinear material contrary to ordinary metal which has homogeneous property and this property of ballast may cause transformation of ballast. Therefore the theoretical modeling of ballast is quite complicated and it is hard to ensure the reliability of the result. The objective of this paper is to examine the availability of GPR(Ground Penetrating Radar) in estimating the thickness and the degree of deterioration of ballast. First, We figured out the principle of GPR which is the technique of evaluating the condition of ballast and then analyzed data which were measured at Gyeongbu high-speed railway where KTX is running now.

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A Study on the Assessment of Track Stabilization on Ballast Cleaning work site (크리너 작업구간 선로안정화 상태평가에 관한 연구)

  • Jeon, Il-Sik;Lee, Syeung-Youl;Choi, Hyoung-Su;Kim, Han-Chip
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.268-274
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    • 2011
  • In railway, Ballast plays an essential role as intermedium in transmitting train load to subgrade safely. Gyoung-Bu HSL 1st phase consists of ballasted track except for over 5km long tunnels. Ballast track occurred track irregularity by train loads and requires periodic maintenance work. However, Repetitive train operation and tamping work cause to accelerate track irregularity and ballast deterioration such as abrasion and crushing. For these reason, Track irregularity areas had occurred ballast cleaning work to improve track quality. However, for the train to run safety, ballast cleaner working area needs train speed reduction and track stabilization work due to ballast relaxation and initial settlement. In this study, according to train speed-up and cumulative traffic tonnage, we measured and analyzed the track settlement and acceleration of sleepers to evaluate of track stabilization in order to keep the ballast condition stable after cleaning work.

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