In this paper, the filed test procedure for evaluating the performance of track structure for additional Speed-Up test on Test-Bed Section(KP 100∼128km Osong starting point). The behavior of track system corresponding the speed up of train will be identified by the analysis of the measured data.

In this study, will evaluate the performance of noise reduction devices for next generation high speed railway system of a train which has maximum speed over 400km/h. The core soundproof devices are the absorption block which reduces the reflection noise from concrete slab track and the interference device installed the top of noise barrier. Two types devices will be verified at 400km/h test section according to studied performance assessment at Hwang-san Kim-jae Chonbuk, Jeonbuk, Korea.

Needs for a new technologies of infrastructure systems arose, following the development of next generation EMU(Electric Multiple Unit) train with maximum speed over 400km/h. For high-speed operation tests of the new EMU, a high-speed railway infrastructure test-bed was constructed in a 28km long section of the Honam High-speed Railway. Diverse sensors and monitoring system was installed for continuous monitoring of the railway. Due to such effort, further demands and needs of the integrated monitoring system was derived in a more comprehensive and long-term perspective.

Research results of High Speed Railroad Infrastructure Research Team are included in the fields of environmental noise reduction, the design criteria of high-speed railroad structures, catenary system, train control system. Therefore, we will apply these research results to test-bed in Honam high speed railroad and verify them.

In Korea, Because of excellent bending and torsional rigidity, PSC Box girder types have been applied to high-speed railway bridge in the most of the construction sites. But the introduction of a new structure types and materials is required in terms of diversity of landscape as landmarks. In this study, the latest high-speed rail bridge technology is investigated in terms of functionality and landscape.

Railroad concrete track is continuously supporting structure for repeated impact loads. Fine cracks which occurred in the early stage of the train operation, gradually expanded depending on the tonnage increases, and the function of the slab track is reduced. And, occurrence of track irregularity, worsening of ride comfort and interfere with the safe operation of trains would be follows. Therefore, management and maintenance of the initial crack is very important, railroad maintenance overhaul organizations detected twice a year or more the cracks and paint it, displays the location and severity, the type of cracks, width and length by creating a developed view. Each year much maintenance works is required for checking the crack of concrete trackbed and sleepers.

In this study, it explains briefly the test procedure for evaluating the performance of roadbed in test-bed section of Honam high-speed railway.

In this study, a full-scale test was conducted to analyze the behavior characteristics which are related to roadbed according to steel pipe press-in excavation during construction of underground railway crossing. the value of depth of soil cover that is the most sensitive element gets to increase gradually by 1.0, 1.5, and 2.0(H/D). Then we performed press-in excavation and measured the displacements of roadbed with LVDT. When the depth of soil cover level is 1.0(H/D), the maximum value of 5.2mm were seen at the point of 2mm for pipe press. Also, when depth of soil cover had increased, Uplift decreased more than 3 times in comparison with the one.

The schedule speed is one of the most important elements of railway industry. In korea, Gyeongbu Line’s highest speed is 300km/h. But it’s schedule-speed is no more than about 174km/h from Seoul to Busan. In this study, we analyzed the effect of the proposed improvements in the speed reduction zone using Train Performance Simulation. We found that the improvements can raise the schedule speed from 15 to 20%.

궤도틀림은 열차의 주행안전 및 승차감에 미치는 영향이 크고, 소음 진동의 주요원인으로 작용한다. 따라서 현장에서 발생하는 궤도의 틀림을 체계적으로 분석함으로써 이를 저감할 수 있도록 차량운행 조건과 선로선형 및 궤도구조를 설계하는 것은 중요한 과제이다. 현재 국내에서 EM-120에 의해 검측된 틀림 데이터는 매우 불규칙적인 형태를 나타내며 데이터 분석 시 다양한 문제점을 가지고 있다. 본 연구에서는 궤도의 효율적인 유지관리를 위해 검측된 틀림데이터의 효율적인 처리 기법을 개발하고, 정제된 데이터를 이용해 선로를 구성하고 있는 이음매, 도상, 노반, 체결구 등의 요소를 고려하여 레일 궤도 틀림의 진전 정도를 정량화 하였다. 또한 축적된 검측 데이터로부터 궤도의 건전도를 평가할 수 있는 방법을 정립하고 잔존수명을 예측하여 효율적 유지관리를 실현하기 위하여 검측 데이터의 확률론적 수명 산정 기법 개발 및 데이터를 이용한 구간 특성에 따른 궤도틀림 표준편차의 틀림 진전 정도에 대한 통계 및 확률적 분석을 수행하였다.

레일마모는 열차의 주행안전 및 승차감에 미치는 영향이 크고, 소음․진동의 주요원인으로 작용한다. 또한 레일마모가 발생할 경우 궤도구조의 파괴를 촉진시킴으로써 차량 및 궤도유지보수비를 크게 증가시킨다. 따라서 현장에서 발생하는 마모 원인을 체계적으로 분석함으로써 마모를 저감할 수 있도록 차량운행 조건과 선로선형 및 궤도구조를 설계하는 것은 중요한 과제이다. 본 연구에서는 궤도의 효율적인 유지관리를 위해 궤도를 구성하고 있는 레일, 체결구, 침목, 도상 등의 요소를 고려하여 레일 궤도의 생애주기 거동 및 유지관리 특성을 분석하였다. 또한 축적된 진단/검측 데이터로부터 궤도 구성품의 건전도를 평가할 수 있는 방법을 정립하고 잔존수명을 예측하여 효율적 유지관리를 실현할 수 있는 기법 개발을 위하여 지하철 레일단면마모데이터를 이용한 구간 특성에 따른 시간-마모량의 확률적 분포 변화와 다중회귀 분석을 수행하였다.