http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황선근(Hwang Sun-Keun),신민호(Shin Min-Ho),이성혁(Lee Seong-Hyeok),이시한(Lee Si-Han),최찬용(Choi Chan-Yong) 한국철도학회 2000 철도저널 Vol.3 No.1
The analysis of static and dynamic characteristics of reinforced roadbed materials was performed through model and laboratory tests. The strength characteristic of reinforced roadbed materials such as HMS-25 and soil were investigated through the unconfined axial compression test, the model soil box test and the combined resonant column and torsional shear test. The unconfined axial compression strength of HMS-25 shows a steady increasement in strength due to the chemical hardening reaction between HMS-25 and water. The result of model soil box test reveals that railroad roadbed of HMS-25 is better than that of soil in several aspects, such as, bearing capacity and settlement. The combined resonant column and torsional shear test result indicates that shear modulus of HMS-25 and soil increase with the power of 0.5 to the confining pressure and linear relationship to normalized shear modulus and damping ratio.
이일화(Lee Il-Wha),황선근(Hwang Seon-Keun),박태순(Park Tae-Soon),이보형(Lee Bo-Hyoung),고학송(Ko Hak-Song) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Recently, the development of paved track is required as a Low-maintenance of conventional line. The most important factor of paved track is stability and applicability. In this method, the ballast is grouted with mortar so that the ballast can tum into a structure like slab. This method can be subdivided into the followings. One is the method with switching the ballast, and the other is without switching the ballast. The ordinary and actual states of the ballast and roadbed were investigated to evaluate the applicability of the paved track structure in this study, and various In-situ tests were applied. Non-destructive tests such as GPR, SASW, FWD were used, and bearing capacity of roadbed, depth of the ballast, and deterioration, penetration, and contamination of the ballast were focused. The result of this investigation was utilized in the selection of optimal paved track structure and data for preliminary design.
이호룡(Lee Ho-Ryong),박종관(Park Jong-Kyan),황선근(Hwang Seon-Keun),이일화(Lee Il-Wha) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
As gravel roadbed is gradually turn down by repetitive loading of train, lasting work for maintenance and management of track is necessary to reduce the settlement of roadbed and the deterioration of track. Despite of above weak point, gravel roadbed has become a basic structure of roadbed at the present time. But request for new structure of roadbed is recently presented to settle an increased transportation capacity of track, and to solve a shortage of the labor to handle maintenance work of track. Therefore, we begin to research about maintenance-free roadbed like paved track from two years ago. In this study, a series of tests were performed to clarify the characteristics of strength and permeability of concrete specimen, which is the upper part of paved track injected by cement mortar, by type of geotextile and finally to give a basic data for application of geotextile to the lower part of paved track.
이성혁(Lee Seong-Hyeok),이진욱(Lee Jin-Wook),최찬용(Choi Chan-Yong),황선근(Hwang Seon-Keun) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
In many countries the slab track of railroads is mostly applied on the railroad bridges and tunnels, however it hasn"t been constructed in the tunnel in Korea. Presently the Korea highspeed railway construction authority is planning to construct slab track in the tunnels to minimize the cost of maintenance and repair. In this study, dynamic characteristics of the railroad roadbed which was constructed using crushed stones obtained from tunnel construction was investigated through the field investigation, real scale model test and numerical analysis. As a conclusion. the roadbeds built with the crushed stones produced at the tunneling site satisfy the requirement of roadbed in terms of displacement and earth pressure for the slab track in the tunnel.
암반상 토노반 구간에서의 공진 속도 및 주파수에 대한 이론적 연구
이일화(Lee Il-Wha),황선근(Hwang Seon-Keun),이수형(Lee Su-Hyung),최찬용(Choi Chan-Young) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
When the high-speed train running on the track, there is a speed band which track distortion is unusually increased according to the condition of track and roadbed. This speed is called critical velocity and physical parameter value increased greatly. These phenomenon happened as high-speed train were developed, studied regularly through TGV 100 running test in France. As research result until now, the main reason is soft roadbed"s capacity. Wave propagation and track support capacity is varied by the site characteristics. This paper achieved theoretical examination about resonance band(speed and frequency) that occurred in roadbed on the base rock in point of geotechnical engineering. The examination of resonance divides with ground response analysis, critical band analysis by the shear wave velocity of roadbed, train critical speed through the ground stratum.
저회-폐타이어 재생혼합토의 실대형 성토구조물 성능 시험
이성진(Lee Sung-Jin),신민호(Shin Min-Ho),황선근(Hwang Seon-Keun),고태훈(Koh Tae-Hoon),이용식(Lee Yong Sik) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Recently, a global trend has been established to facilitate the use of waste materials in geotechnical engineering applications. In Korea, where there is the need to save natural resources as these may become scare in the near future and to prevent excessive ground excavation for natural aggregates. The annual production of scrap tire and bottom ash has sharply increased in recent years. Therefore, it will be good waste resource recycling, if we can utilize the above wastes as fill materials in soft ground. In this study, based on the proven feasibility of bottom ash and tire shred-soil mixtures as lightweight fill materials, tire shred-bottom ash mixtures were suggested as a new lightweight fill material to replace the conventional construction material(soil) with bottom ash. Therefore, the main objective of this research is to investigate the feasibility of tire shred-bottom ash mixturesin order to estimate their suitability for the use of lightweight fill materials. So we carried out the performance tests of 2 large scale embankment which were made with tire shred-bottom ash mixture and the conventional fill material(weathered soil) respectively.
대형삼축압축실험을 이용한 동적물성 산정 : 장비구축 및 검증
이성진(Sung-Jin Lee),김윤기(Yun-Ki Kim),이준석(Jun-S. Lee),황선근(Seon-Keun Hwang),박재준(Jae-Jun Park) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Coarse granular materials such as gravel and crushed stone have been used as an important fill materials to large soil structure of railway, road, dam and so on. Although much studies for general soil materials have been carried out domestically, the studies for coarse materials were insufficient. Particularly, it is the level in which the study for dynamic properties(Elastic modulus and damping ratio) of coarse materials, applies the foreign country literature. This is due to the lack of large equipment for element test. But large soil structures made of coarse granular materials are generally important infrastructures. Therefore, the reliable design parameters for coarse materials should be obtained for safe and economic design, construction and maintenance. Triaxial test is the laboratory test method that is capable of controlling a confining pressure and boundary condition. In this project, we made a multi-purpose large triaxial testing system. This testing system is able to test coarse granular materials with maximum particle diameter of 100㎜ and support both the load control and displacement control. The load cell is installed inside of triaxial cell and the axial displacement is measured locally in order to control and measure more accurately in the small strain level. The verification test of this testing system was carried out with urethane verification specimens. So, from now on the useful information for coarse granular materials are expected to suggested by performing many tests with various material and condition
신장성 지오그리드 보강재의 인발저항특성 평가를 위한 시험 및 수치해석 기법
이성혁(Seong-Hyeok Lee),고태훈(Tae-Hoon Koh),이진욱(Jin-Wook Lee),황선근(Seon-Keun Hwang) 한국철도학회 2002 철도저널 Vol.5 No.2
Reinforced earth structure has been regarded as general structure in order to achieve efficient land utilization as well as securing safety in railway service lines in other countries, but there are no construction actual results in Korea. In this study, tile soil-geogrid interaction mechanism was investigated experimentally and numerical analysis was performed to predict Pull-out behaviour of geogrid embedded in reinforced earth body. This experimental data and analysis result can not contribute to understand the soil-geogrid interaction mechanism at soil-geogrid interface but also be used in design practice of the railway reinforced earth structures.