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김낙영(Kim, Nagyoung),강희만(Kang, Heeman),김홍종(Kim, Hongjong),신용석(Shin, Yongsuk),김창용(Kim, Changyong) 한국지반환경공학회 2012 한국지반환경공학회논문집 Vol.13 No.12
건설공사장에서 사용하는 주요 건설장비에 대한 소음측정을 이격거리별로 수행하였다. 특히, 작업형태에 따라 변동하는 폭이 큰 건설장비에 대해서는 작업형태를 세분화하여 소음측정을 수행하였다. 무부하 및 작업이 이루어지는 시간 동안의 옥타브밴드별 ‘A’보정 등가소음도(Leq)를 측정하였다. 소음측정결과 대부분의 건설장비가 점음원의 특성과 유사하게 나타나고 있는 것으로 분석되었다. Noise measurements were performed by distance for major construction equipment. especially, For construction equipment that large width of variations is depending on the type of work, noise measurements were performed by the detail type of work. For a time of quiescent and construction, “A” compensation equivalent noise level (Leq) were measured. Most of the construction equipment and the characteristics of the point source appears to be similar in analyzed noise measurement results.
정종홍(Jung Jonghong),김홍종(Kim Hongjong),최영철(Choi Youngchul),이명석(Lee Myungseok) 한국토목섬유학회 2011 한국토목섬유학회 학술발표회 Vol.2011 No.4
The expanded polystyrene(EPS) method is known as representative light-weight embankment countermeasures for road construction on very soft clayey deposits due to its lightness and good engineering properties. This method has been adopted for backfills of bridge since 1991 in Korea. However, long-term performance of EPS embankment after construction and its effect on the pavement above has not been evaluated yet. In the present paper, a case of pavement fatigue above EPS block due to vibration 15 years later after construction, differential settlement at transitionzone of EPS, and fire on EPS were discussed. The deflection at EPS section measured by a series of FWD tests was about 3 times than that of ordinary earthwork zone. A large deflection is regarded as to cause fatigue damage on pavement. It needs to investigate relationship between fatigue damage of pavement and vibration of EPS bock as well as its dynamic characteristics of EPS.
남문석 ( Nam Moon S. ),도종남 ( Do Jongnam ),김홍종 ( Kim Hongjong ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
In this study, the case was analyzed for the repair of the reinforced earth wall during its construction. Such a problem is deemed to require more in-depth design and quality control.
허열(Heo, Yol),권선욱(Kwon, Seonuk),김홍종(Kim, Hongjong),배우석(Bae, Wooseok) 한국지반환경공학회 2011 한국지반환경공학회논문집 Vol.12 No.10
본 연구에서는 고성토 구간 파형강판 수로암거의 대표단면을 대상으로 뒤채움부의 다짐도에 따른 원형 연성지중 암거에 작용되는 수직토압 분포를 파악하기 위해 원심모형실험을 실시하였다. 모형실험은 뒤채움부의 다짐도를 80, 85, 90, 95%로 변화시키면서 현장의 상사성을 고려하여 53g-level의 중력수준에서 수행하였다. 실험결과, 연성거동을 하는 파형강판 상부의 아칭효과에 의한 하중감소계수는 AISI(2002) 설계법에서 규정한 뒤채움 다짐도에 따른 하중감소계수와 거의 일치하였다. 파형강판 상부에서 측정된 수직토압은 다짐도가 증가함에 따라 선형적으로 감소하였으며, 뒤채움부의 다짐도가 클수록 아칭효과에 의한 파형강판 상부의 상재하중 감소가 크게 발휘된다는 것을 확인할 수 있었다. 파형강판 상부에서 발생한 아칭효과에 의해 감소한 하중이 파형강판 측면 뒤채움부(EP 1)와 뒤채움부 외부(EP 3)로 전이되는 것으로 나타났다. A series of centrifugal model test was conducted to investigate the distribution of vertical earth pressure on circular ductile underground corrugated steel plate waterway culvert with considering the compaction degree of the backfill in the high landfilled embankment section. The compaction degree of backfill was varied to 80, 85, 90, and 95% at the 53g-level gravity considering the similarity of the site. As a result of this test, the load reduction factor by the arching effect of the top of corrugated steel plate showing ductile behavior nearly agreed with the load reduction factor according to the compaction degree of backfill specified in the AISI(2002) design method. The vertical earth pressure measured at the top of the corrugated steel plate was linearly decreased as the compaction degree increased. The greater the compaction degree of backfill was, the greater the reduction of surface loading on the top of the corrugated steel plate by arching effect. The load decreased by arching effect on top of the corrugated steel plate was transferred to the side backfill of the corrugated steel plate(EP 1) and the outside of backfill(EP 3).