PURPOSES : This study was conducted to prevent slip accidents on manhole covers located on sidewalks and local roads as well as to propose reasonable slip resistance management standards for manhole covers. METHODS : Using field surveys, test groups were classified based on the patterns and wear amounts of the manhole covers. Standards for measuring the equipment and methods for slip resistance were established, and the slip resistance values were compared and analyzed for each manhole cover test group. RESULTS : According to the slip resistance test results, micro-protrusions on the non-slip manhole covers were found to be effective in improving slip resistance. However, in areas without microprotrusions, the improvement in slip resistance was minimal and yielded results similar to those of standard manhole covers. In addition, among the pattern types of standard manhole covers, the radial pattern was found to be the most susceptible to slipping. Under the current wear measurement standards, the change in slip resistance at different wear stages was found to be relatively small. Moreover, manhole covers had the lowest slip resistance among road surface structures, indicating the need to establish management standards for them. CONCLUSIONS : To prevent pedestrian slip accidents on sidewalks and local roads, it is necessary to ensure that the slip resistance standards of manhole covers are higher than those of sidewalks.

ABSTRACT
    1. 연구배경 및 목적
    2. 관련 기준 및 선행연구
    3. 현장조사
4. 맨홀뚜껑 미끄럼저항성 시험 방법론
    4.1. 시험장비
    4.2. 시험방법
    4.3. 맨홀뚜껑 유형 및 시험군 분류
5. 미끄럼저항성 평가
    5.1. 미세돌기 유무에 따른 비교
    5.2. 일반맨홀 문양패턴에 따른 비교
    5.3. 맨홀뚜껑 마모량에 따른 비교
    5.4. 기타 맨홀 및 인접 도로시설물과의 비교
6. 맨홀뚜껑 미끄럼저항성 관리기준 제안
7. 결론
감사의 글
REFERENCES

• 마경훈(서울연구원 인프라기술연구실 연구원, 인하대학교 토목공학과 박사과정) | Ma Gyeonghoon
• 박대근(서울연구원 인프라기술연구실 실장, 연구위원) | Park Daegeun Corresponding author
• 오한진(서울연구원 인프라기술연구실 연구위원) | Oh Han Jin