• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.650-650
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• 2015

최근 하천에는 치수와 하천생태를 고려한 수많은 하천복원기술이 개발 적용되고 있으나 국내 여건을 제대로 반영한 기술이 전무한 것이 현실이다. 또한 과도한 콘크리트 사용으로 인한 하천경관의 훼손 및 하천생태계에 악영향을 미치고 있으며 이와 더불어 강우량의 증대 및 집중호우 등 돌변하는 기후변화로 하천환경변화에 대한 적용 가능한 기술이 미비하다. 따라서 하천에 유해한 물질을 방출시키지 않고 하천환경 및 하천 생물의 생활사에 영향을 주지 않는 무 저독성 소재를 활용하여 기후변화에 대응이 가능하도록 수리적 안정성을 강화시키고, 생태적으로도 건강한 생태하천 복원 기술개발이 요구되는 실정이다. 본 연구에서는 무독성 소재를 활용하여 치수적으로 안정적이고 식물 및 어류 등 각종 생물의 서식이 가능한 하천호안공 기술을 개발하였으며, 개발된 호안기술은 창원시 마산회원구에 위치한 광려천 상류 일부구간에 시범적으로 적용하였고, 시공 전 중 후 물리, 화학, 생물 모니터링을 통하여 개발기술의 현장 적용성을 검증하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.669-670
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• 2023

본 논문에서는 열화상 카메라 및 주변 환경요인 측정 시스템을 이용하여 각종 반도체 제조공정에 사용되는 화학물질의 누수를 검출하는 방안을 제안한다. 이는 대형화되고 복잡한 집적배관이 시공되어 있는 공장 환경에서 검출센서를 통한 화학물질 누수 관리를 열화상 시스템으로 대체함으로써 보다 정확하고 안정적인 모니터링을 통해 신속한 대응 및 관리가 가능할 것이다. 또한 본 연구를 통해 누수 배관표면의 열패턴을 실시간으로 모니터링 함으로 기존 누수 검출 센서(면적식 라인타입의 센서)에 대비하여 20% 이상 검출의 신속성 향상을 보장할 수 있다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.263-266
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• 2010

비정형 형상의 초고층 건물이 증가함에 따라, 설계 시공 계획 단계에서의 시공 중 건물의 구조적 안정성 검토가 핵심 사항으로 부각되고 있다. 시공 중 비정형 초고층 건물의 안정성을 확보하기 위해서는, 횡력저항시스템이 완전히 형성되기 전 구조체 자중의 불균형 분포에 의해 발생하는 수직부재의 불균등 축소, 골조의 기울어짐 혹은 횡변위 등이 시공단계해석에 의하여 검토되어야 하며, 시공단계해석은 구조건전성모니터링, 시공 보정 프로그램, 시공계획 수립 등과 체계적으로 결합되어 진행되어야 한다. 이 논문은 시공 중 비정형 초고층 건물의 구조 안정성 검토를 위하여, 실제 비정형 초고층 프로젝트에 시공단계해석을 적용하였으며, 시공 중 초고층 건물의 안정성 확보를 위한 주요 검토 항목 및 방법을 제시하였다.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.954-957
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• 2011

본 논문은 기존의 샌드 드레인 시공장비의 베이스 머신인 기중기 대신에 포크레인을 이용하여 샌드 드레인 시공 장비를 개발 하였다. 그리고 세부적인 기술 개발 사항으로 전기적 타설의 방식에서 유압 타설을 통한 작업 효율 연비 향상과 구조해석을 통한 장비의 무게의 경량화를 이루었다. 그리고 리더의 각도 조절을 통하여 작업의 향상을 도모 할 수 있는 각도 조절 장치와 타설 작업의 자동 모니터링과 제어를 할 수 있는 자동제어 시스템을 개발 하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1089-1094
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• 2021

In order to support the restoration and construction work of port infrastructure facilities damaged or damaged due to disasters and disasters, it is linked with work equipment based on the performance of duties such as regular patrol in the port, monitoring the underwater environment, and acquisition of underwater configuration information in the port, Define content related to AUV platform analysis and design that can support construction.

• Korean Journal of Environment and Ecology
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• v.26 no.3
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• pp.437-445
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• 2012

The study performed the implementation monitoring of the revegetation methods applied to the test-bed of Simgok Stream in Incheon to identify the effect of water level and inundation period on the vegetation coverage of the stream bank revegetation methods. The categories of monitoring included the plant species and plant coverage for each method, physicochemical property of soil, water level and water quality. The result of monitoring revealed that plant growth conditions of all revegetation methods of each stream bank were good in the first survey as of May 2010. However, in the second survey of June 2011 when inundation period was less than a week, plant growth conditions and coverage of revegetation methods were partially bad. In the third survey as of August 2011 when inundation period was longest as 8 weeks during survey period, most vegetations did not survive except for Phragmites communis. But plant species number and plant coverage were increased gradually in the forth survey as of October 2011 when inundation period was less than 2 weeks so water level decreased more than that of third survey. Accordingly, the correlation analysis among number of plant species and plant coverage on stream bank, which applied revegetation method, water level and inundation period was performed for quantitative analysis. The result revealed that number of plant species and plant coverage has a negative correlation with water level and inundation period, but inundation period had higher correlation with plant occurrence than water level.

• 한국방재학회:학술대회논문집
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• 2007.02a
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• pp.353-356
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• 2007

Asphalt pavements of the airport in service were monitored to construct new runway and taxiway and longitudinal cracks were found on the pavements. The sources of the longitudinal cracks were the low density which was caused by the longitudinal cold joint with asphalt Pavement constructions and the excessive loads of aircraft. Therefore, the echelon paving method using a 12m-wide screed finisher was used to eliminate longitudinal cracks. When the echelon paving is used, construction of the longitudinal joint is changed so that the compaction of the unconfined edge of the first lane is delayed until the second lane is placed. In conclusion, the use of this construction method results in the density of the longitudinal joint being equal to that of the adjacent mat.

• International Journal of Highway Engineering
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• v.9 no.3
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• pp.101-110
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• 2007

Joint Spacing of Jointed Concrete Pavement has been uniformly designed and constructed as six-meter in Korea. However, engineering backgrounds to show the appropriateness of six-meter Joint Spacing has not been provided. In the on-going reseach of the development of Korea Pavement Reseach Program(KPRP), the optimum Joint Spacing is suggested as 6 to 8 meters according to the regional climatic conditions based on the mechanical-empirical analysis of short-term and long-term pavement distress. This study is a part of the investigation on the adequateness of Joint Spacing design specification suggested in KPRP. Joint Spacing was design and constructed as seven-meter Joint Spacing suggested as design specification in Korea Reseach Program(KPRP) and monitored the Load Transfer Efficiency(LTE), Random crack and compared with those of adjacent $6{\sim}7$ meter Joint Spacing concrete section.

• Journal of the Korean Recycled Construction Resources Institute
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• v.10 no.4
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• pp.593-599
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• 2022

In this study, a crack monitoring system capable of detecting cracks based on image processing techniques was developed to effectively check cracks, which are the main damage of concrete structures, and a program capable of imaging and analyzing cracks was developed using machine vision. This system provides objective and quantitative data by replacing the appearance inspection that checks cracks with the naked eye. The verification of the development system was applied to the construction site of a self-healing concrete water tank to monitor the crack and the amount of change in the crack width according to age. In the case of crack width detected by image analysis, the difference from the measured value using a digital microscope was up to 0.036 mm, and the crack healing effect of self-healing concrete could be confirmed through the reduction of crack width.

• Journal of the Korean Society for Nondestructive Testing
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• v.31 no.4
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• pp.335-342
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• 2011

Application of FBG (Fiber Bragg Grating) sensors to measure strain of steel roof trusses has been performed. This is to check and confirm the structural integrity of an unusually shaped, reverse shell structure made of reinforced concrete. The issue was to place sensors at proper location and compare the measured values to the results from structural analysis. It has been learned that a deliberate measurement scheme is needed in order to monitor a complex structure during construction. In this study, the measured values were within allowable range of strain, thus confirming the safety of the structure during measurement and construction.