• 한국건설관리학회논문집
• /
• 제19권6호
• /
• pp.79-85
• /
• 2018

정부와 안전보건공단에서는 건설현장의 안전사고 저감을 위하여 감독 점검, 기술지도 재정지원 등의 안전활동을 지속적으로 수행하여 왔으나, 건설현장의 재해자수는 매년 증가추세에 있으며, 특히 소규모 건설공사를 위주로 전체 재해자수의 80%이상을 차지하고 있다. 본 연구에서는 소규모 건설공사 현장에서의 안전 보건관리의 이행현황을 조사하고 해당 사업장에 정부의 적정한 기술지도 방안을 마련할 필요성이 있으며, 소규모 건설공사 현장에서의 재해를 줄이고 기술지도사업의 실효성을 확보하기 위한 건설현장에 부합하는 기술지도 최적안을 개발하는 것을 목적으로 한다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 봄 학술논문 발표대회
• /
• pp.247-248
• /
• 2021

Recently, the government is pursuing to reduce the serious accidents in most industries, including the construction industry, by enacting laws on punishment. The accident rate tends to be depended on the size and type of construction sites, and the accidents occur frequently due to inadequate implementation of safety management system and management standards, especially, in small and medium-sized sites. This study has performed the profiling of 265,000 accident cases on construction sites by attribute analysis such as the ratio of days lost to work, and pattern of days lost to work compared to the size of the construction. It turned out that the proportion of accident cases was high mainly in small-scale construction sites, and long-term labor losses occurred. Shortly, it is necessary to establish an institutional standard for applying a realistic safety management cost calculation and management system centered on small-scale sites. Therefore, this study is expected to be used as fundamental data or guideline for developing a customized safety management and accident prevention system for a worker reflecting the conditions of a construction site in the future.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.1243-1244
• /
• 2022

In recent years, the growing interest in off-site construction has led to factories scaling up their manufacturing and production processes in the construction sector. Consequently, continuous large-scale site monitoring in low-variability environments, such as prefabricated components production plants (precast concrete production), has gained increasing importance. Although many studies on computer vision-based site monitoring have been conducted, challenges for deploying this technology for large-scale field applications still remain. One of the issues is collecting and transmitting vast amounts of video data. Continuous site monitoring systems are based on real-time video data collection and analysis, which requires excessive computational resources and network traffic. In addition, it is difficult to integrate various object information with different sizes and scales into a single scene. Various sizes and types of objects (e.g., workers, heavy equipment, and materials) exist in a plant production environment, and these objects should be detected simultaneously for effective site monitoring. However, with the existing object detection algorithms, it is difficult to simultaneously detect objects with significant differences in size because collecting and training massive amounts of object image data with various scales is necessary. This study thus developed a large-scale site monitoring system using edge computing and a small-object detection system to solve these problems. Edge computing is a distributed information technology architecture wherein the image or video data is processed near the originating source, not on a centralized server or cloud. By inferring information from the AI computing module equipped with CCTVs and communicating only the processed information with the server, it is possible to reduce excessive network traffic. Small-object detection is an innovative method to detect different-sized objects by cropping the raw image and setting the appropriate number of rows and columns for image splitting based on the target object size. This enables the detection of small objects from cropped and magnified images. The detected small objects can then be expressed in the original image. In the inference process, this study used the YOLO-v5 algorithm, known for its fast processing speed and widely used for real-time object detection. This method could effectively detect large and even small objects that were difficult to detect with the existing object detection algorithms. When the large-scale site monitoring system was tested, it performed well in detecting small objects, such as workers in a large-scale view of construction sites, which were inaccurately detected by the existing algorithms. Our next goal is to incorporate various safety monitoring and risk analysis algorithms into this system, such as collision risk estimation, based on the time-to-collision concept, enabling the optimization of safety routes by accumulating workers' paths and inferring the risky areas based on workers' trajectory patterns. Through such developments, this continuous large-scale site monitoring system can guide a construction plant's safety management system more effectively.

• 한국건축시공학회지
• /
• 제18권1호
• /
• pp.81-87
• /
• 2018

2017년 2월부터 개정된 건축법에 의해 소규모 건축 프로젝트에 현장관리인을 투입해야 한다. 본 연구에서는 이들의 업무능률 향상을 위하여 이론 고찰을 통해 문제점을 도출하고, 현장관리인의 보다 나은 업무 진행을 돕고자 현장 감리업무의 개선방안을 제시하고자 한다. 이를 위하여 기존의 체크리스트를 대상으로 전문가 설문조사를 수행하여, 소규모 비상주감리 현장관리를 위한 체크리스트를 작성하고자 하였다. 또한 작성된 체크리스트를 기반으로 하는 현장관리 시스템의 활용 방안을 제안하고자 하였다. 이러한 BIM기반의 현장관리 시스템을 활용하면 현장에서 발생하는 다양한 이슈에 대해 실시간으로 모니터링 가능하여 프로젝트를 효과적으로 운영할 수 있을 것으로 기대된다.

• 한국주거학회논문집
• /
• 제11권4호
• /
• pp.53-63
• /
• 2000

The study focuses on the problems of store space supply in apartment sites and suggests policy directions for the problem. Based on the results of field survey and site reconnaissance, this study identifies following problems and policy directions. First, the stores do not meet consumers various demand due to item limitations with small size. Consequently, there are many closed and/or unsold stores with high vacancy rates, Second, there is a tendency that the closed store rate becomes higher as apartment size becomes smaller. We suggest some law and regulation amendment that make store supply optional rather than mandatory in the case of small apartment site construction.

• 건축역사연구
• /
• 제19권6호
• /
• pp.137-153
• /
• 2010

Jeongrimsaji as temple remains of Baekje Sabi period, its re-excavation has been carried three times in full scale. As a result, the buildings in left and right of lecture hall was largely identified in 3 forms. First, layout of small buildings in left and right of lecture hall. Second, layput of corridor in left and right of lecture hall. Third, layout of construction site in the north of corridor in left and right of lecture hall. Above second is included into remains of Gorye, the third is included into remains of Baekje - the remains were almost ruined then. The first form and third form in above is different each other in size of buildings, form of layout, and location. It is important to investigate these points: the time of constructing the buildings; what position have the use and function of the buildings in the temple? ; transition process of layout of the Buddhist temple. In this context, of temple remains in Baekje during the 5~7th century, the cases where construction sites in left and right of lecture hall and construction site in the north of corridor are identified, have been reviewed. Based on this review, the use and function of buildings, their transition process were investigated. The survey results show that small buildings in left and right of lecture hall existed in the middle and later period of the 6th century. During the later 6th century ~ the 7th century, construction site in narrow and long square shape was located in left and right of lecture hall instead of small buildings in the north of corridor. Therefore, it is identified that the aforementioned thing is earlier stage and the latter thing is later stage.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2023년도 가을학술발표대회논문집
• /
• pp.145-146
• /
• 2023

One of the causes of recent construction site collapses was that the compressive strength of concrete was less than half of the allowable design standard strength range. In the safety diagnosis of structures, the compressive strength of concrete is a factor that determines the durability of a building. Therefore, in this study, we aim to examine the characteristics of compressive strength according to the particle size distribution of coarse aggregate among the compressive strength factors using small-diameter cores. To avoid problems when collecting cores, core specimens with diameters of 100×200, 50×100, and 25×50 (mm) were manufactured directly. As a result of measuring the compressive strength of concrete for each diameter, the larger the core diameter, the higher the compressive strength. has increased.

• 한국방재안전학회논문집
• /
• 제9권2호
• /
• pp.43-52
• /
• 2016

최근 산업재해의 전반적인 감소에도 불구하고, 건설업은 증가추세이다. 사고의 대부분은 안전관리자가 선임되어있는 규모가 큰 공사현장보다 다세대주택, 리모델링, 근생시설 등 규모가 작은 공사현장에서 많이 발생한다. 실제 사업장 규모별로 보면 전체 재해의 81.6%, 대부분이 120억원미만 50인미만 소규모 사업장에서 발생됐다. 본 연구에서는 단지형 다세대주택신축사업을 추진하는 소규모 주택업체의 안전관리 운영실태를 조사하고 분석하여 효시적으로 안전경영모델을 표준화시켜 적용했으며, 소규모 주택업체가 표준화된 안전경영모델을 쉽게 이해하고 실천하여 무재해를 달성하는데 목적이 있다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 봄 학술논문 발표대회
• /
• pp.159-160
• /
• 2021

Every year on a construction site safety scale of the crash of an accident, but the large and small, accounting for more than half. In Construction Field wearing safety belts for their safety, but the impact of fracture, including the risk of injury occurs. Accordingly, the death as well as by the crash, injuries that can reduce the size of the invention was driven by safety belts.

• 한국조경학회지
• /
• 제27권2호
• /
• pp.41-50
• /
• 1999

The purpose of this study is to find out the changes in geomorphic characteristics of a small watershed when a golf course is constructed. The research site is a set of seven small watersheds including an 18-hole golf course that were randomly selected. The size, shape, and drainage network of watersheds were measured by using planimeter, watershed eccentricity, and stream order, respectively. In addition, a 25m$\times$25m mesh was used on topographic maps and grading plans in order to obtain the slope, elevation, and aspect of the watersheds. The major results of this research, while investigating of the changes in geomorphic characteristics of watersheds when a golf course is constructed, are as follows: 1. The size of watersheds is increased in accordance to the difference in elevation between the golf course site and the small watershed. 2. The watershed eccentricities are in general similar except for a few low-valued cases. 3. The changes in the average altitude and the gradient are more drastic with their bigger original values. 4. The aspects are changed more with decreasing elevation. 5. The stream order decreases in the case of a low watershed eccentricity. 6. The surface modification has a closer relationship to the slope rather than the size of effective use area. 7. With a steeper gradient and an excessively low gradient, the height of cutting/filling is increased.