고무차륜 AGT 주행로의 제작방식별 시공정밀도 평가를 위한 차상진동가속도 분석

이일화,문지호,신정렬,이호용 한국방재학회 2016 한국방재학회논문집 Vol.16 No.2

Vibration accelerations for various velocity and running direction were analyzed to evaluate the construction accuracy of rubber-tired AGT runways manufactured by the cast-in-place and pre-casted method. For this, time and frequency history characteristics of vibration acceleration were analyzed for the test section constructed by cast-in-place and pre-casted method. From the results, it was found that quantitative evaluation of construction accuracy depending on manufacturing method was possible, and the pre-casted method showed considerably improved runway performance comparing with cast-in place typed runway. 고무차륜 AGT주행로의 제작방식별 시공정밀도를 평가하기 위하여 현장타설형과 프리캐스트형 주행로를 대상으로 속도대역 및 주행방향별 차상진동가속도를 분석하였다. 평가방법은 각 제작방식별로 시공된 시험구간 통과 시 진동가속도의 시간 및 주파수 이력특성을 중심으로 평가하였다. 그 결과, 차상진동가속도를 이용한 주행면의 시공정밀도에 대한 정량적인 평가가 가능한 것으로 나타났으며, 프리캐스트형 주행로가 현장타설형 주행로와 비교하여 상당히 높은 수준의 주행면 품질을 제공하는 것을 확인하였다.

行政國家의 憲法構造

李壹和 慶北專門大學 (영주경상전문대학) 1981 慶北專門大學 論文集 Vol.3 No.-

In the 20th century cotemporary states have been developing into administrative states in which the Executive as a central role practices national politics. Accordingly, the purpose of this study is to trace origins and dynamics of the administrative state, investigating the fundamental principles, and to study the constitutional strucutre, of such states. First, the process and underlying causal factors of the administrative state are examined and analyzed in terms of developmental stages: the ages of absolutism, liberalism, and welfare. These principal distinctive features are then studied. Second, four fundamental principles of the administrative state that is, Politics, publicity, Planning, and efficency are introduced. The role and function of each individual principle is then examined. Third, the primary goals of this study of constitutional structure in the administrative state may be divided into five research areas for further effective study: (1) To point out a tendency toward identity between state and individual societies in terms of fundamental order. (2) To study the characteristics and tendencies of the human rights of individual citizens. (3) To divide the organization of government into legislative, executive, judicial powers and study their individual distinctive characteristics and trends. (4) To find out whether the local self-govermental organization shows a marked trend toward centralization. (5) To assert that in a contemporary economy it shoud be nccessary to add the rule of planning to free economic order. Finally, it has been emphasized in this paper that all managed societies should be convergent to administrative states, and that the administrative state should aim to fulfil the freedom of individual citizens, not to deny it.

사진속 지반공학이야기 : 해방전 철도교각 건설을 위한 가압식 잠함기초공사

이일화 한국지반공학회 2006 지반 : 한국지반공학회지 Vol.22 No.8

상호작용을 고려한 철도 토공-교량 접속부의 설계 및 유지관리

이일화,Lee, Il-Hwa 한국지반공학회 2006 지반 : 한국지반공학회지 Vol.22 No.11

건설 및 공용 중 터널 바닥에서 발생하는 융기 현상과 대책

이일화 한국철도학회 2018 철도저널 Vol.21 No.3

미고결 파쇄대 구간에서 발생하는 터널바닥 지반 융기의 원인과 대책

이일화,유민택,박정준,최영태,장동두,Lee, Il-Hwa,Yu, Min-Taek,Park, Jeong-Jun,Choe, Yeong-Tae,Jang, Dong-Du 한국터널지하공간학회 2018 자연, 터널 그리고 지하공간 Vol.20 No.4

고속철도 노반지지조건에 따른 임계속도효과의 동적응답

이일화 한국지반공학회 2013 한국지반공학회논문집 Vol.29 No.1

The critical velocity effect on railway trackbed means the amplification of vibration energy when the train running-speed and group velocity of ground surface wave are superimposed. It is called a pseudo-resonance phenomenon of time domain. In the past, it was not issued because the train speed was low and the ground group velocity was higher. But since the high-speed train is introduced, critical velocity reported causing a track irregularity. So far,theoretical analysis has been performed because of the complexity of formation process. However it requires reasonable consideration which is similar to actual track and trackbed conditions. In the present paper, finite element analysis to verify the critical velocity effect is performed considering each track structure and trackbed supporting stiffness. As a result, the deformation amplification caused by the critical velocity effect is verified to analyze each supporting stiffness and track system.

토공노반의 침하억제성능 향상을 위한 설계기준 개선 방안

이일화 한국철도학회 2014 철도저널 Vol.17 No.6

주행안정성과 궤도사용성을 고려한 침하복원공법의 요구기준 제안

이일화 한국철도학회 2020 한국철도학회논문집 Vol.23 No.5

Settlement during concrete track construction strictly constrained, but has unavoidably occurred due to environmental conditions, inappropriate standards, construction management, etc. When settlement has occurred, the deflection is corrected using vertical adjustment pads of fastening devices; however, a special restoration method is applied for excess correction values. The restoration method is applied as a maintenance countermeasure, but it has some problems with application. In this paper, application criteria for restoration method are proposed based on research data, field experience, and review of evaluation items and contents in consideration of train running stability and track serviceability. Parameters are vertical curve criteria, track supporting coefficient, track vertical acceleration, slab and rail stress, injection performance, and grout material performance. It is found to be necessary to satisfy the application criteria even if construction procedures and material are different. And, quantitative draft application criteria for settlement restoration method considering train running stability and track serviceability are suggested.

現代國家의 權力構造의 特質 : 특히 法社會學的 考察을 中心으로

李壹和 慶北專門大學 (영주경상전문대학) 1977 慶北專門大學 論文集 Vol.1 No.-

The modern state, compared with the current one, has been considerably changed in the power structure. I attempted to study mainly on the characteristic of power structure in the current state from the law sociological point of view. 1 described the main points on the doctrine of the popular sovereignty and of the separation of powers which is the essential elements in the power structure, and then disclosed the historical nature of their doctrines. I also explained the constitutional position of the parliament in the modern state, described the change process of its position in the current state and pointed out the various factors on the characteristic of the legislative in the current state as follows: (1) the degradation of the parliament in the constitutional position has taken place because a state has made the social and economic progress, and the Structure of democracy has been transformed: (2) the structure of the parliament has been also changed for the reason above-mentioned; (3) the system of the parliament has the inclination to be rationalized; (4) the referendum, the public management of election and the functional representation have been established as a enlivened policy of the declined parliament system. 1 examined how to bring the current administrative state into being. I can point out, therefore, three kinds of things as the characteristic of the executive. As we need to have the social state or the welfare state, it has been inevitable for the executive to form a strong power. Taking it into consideration, the following three factors I already designated above might well be described: (1) the structural expansion of the executive, (2) the functional expansion of the executive, (3) concentrating the power on the executive. With respect to the judiciary I explained the constitutional position of the courts in the modern state, and also I pointed out the four factors as the Characteristic of the judiciary as follows: (1) the tendency of the political power's being formed on account of the judicial review of law and statute, (2) the constilution protectors' position by the system of judicial review, (3) the inclination of approaching to the administrative state and judicial state as well, (4) the possibility of infringing on the independence of the judiciary. The characteristic of power structure in the current state is inclined to show the interation of power. Accordingly, the inevitable degradation of the legislative as well as the judiciary can not be avoided owing to the gradual expansion of the executivc. Yet I put emphasis in this paper on the doctrinc of the Separation powers, thc system of the representation and the independende of the judicial powcr which are indispensable and strictly observable in free democracy.