• 전기학회논문지
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• 제67권5호
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• pp.688-694
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• 2018

The transition section of the overhead rigid conductor rail (ORCR) consists of a direct induction device and a limit point to prevent the power supply failure and failure of the electric railway vehicle pantograph due to the difference of the uplift in the catenary line. In T-Bar transition section, a twin simple catenary is mostly installed between the overhead catenary system (OCS) in the ground section and the ORCR in the underground section. In this paper, we compare and analyze the possibility of replacing the twin simple catenary with heavy simple catenary. The reliability of numerical analysis results was confirmed by comparing field test with numerical results. Comparing the numerical results of the twin simple catenary with the heavy simple catenary in the transition section, the difference uplift is 5.9[mm] on average. When applying heavy simple catenary instead of twin simple catenary, the slight difference of uplift can be compensated by adjusting the height of hanger-ear or support bracket.

• 자원리싸이클링
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• 제5권2호
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• pp.52-56
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• 1996

콘크리트 건설폐기물 중에서 재활용이 가능한 천연골재(모래, 자갈)를 분리하기 위하여 분쇄특성을 조사하였다. 30mm이하의 파쇄물을 롤분쇄기와 함마분쇄기를 사용하여 분쇄한 결과, 시멘트콘크리트가 아스팔트콘크리트보다 미세한 입자크기로 분쇄되는 반면, 함마분쇄물이 롤분쇄물보다 골재와 기타물질간 분리가 양호하게 나타났다. 분쇄한 콘크리트를 다시 Shaking table을 사용하여 비중분리실험한 결과, 70∼90% 이상의 높은 천연골재 함유율을 얻을 수 있었다.