• Korean Journal of Construction Engineering and Management
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• v.20 no.6
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• pp.81-88
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• 2019

Recently, the government has shown a decrease in disaster accidents throughout the industry and construction industry due to various efforts to reduce disasters. However, the fall accidents in the construction industry are not decreasing but increasing. In particular, the fall accident caused by scaffolding is low each year, but the disaster intensity is very high in that it directly leads to the death of workers. Scaffolding working environment in domestic construction industry is very poor. Moreover, scaffold workers in small construction sites are not subject to safety oversight and control. Therefore, this study is the installation and non-installation of the vertical lifeline, which is the most fundamental problem to be prevented during the study, to prevent the fall of the moon scaffold. In addition, it is hoped that it will be a solution for preventing accidents in construction site construction through the identification of various causes of disasters such as rope loosening, rope breaking, and fixed point failure.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.455-458
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• 2008

The purpose of this study is to analyze technical manpower management problems that were made by specialized construction company, centering on the field of machinery and equipments, to offer an improvement of technical manpower management. For this study, the adapted research method select owners&foremans on 18 specialized construction company by machinery&equipment services and on-site supervisors on general contractor and then investigate the problem of contract and subcontract by survey. After analyzing the actual state of management, it present an improvement of technical manpower management. The results of this research are as follows. 1) It is analyzed foreman had a number of difficulty for dealing manpower management because of subordinate relationship between supervisor and foreman. 2) The improvement of technical manpower management is concluded that foreman is to be on- site proxy supervisor or to be hired by an annual salary.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.4D
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• pp.433-442
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• 2010

Recent decrease in the availability of experienced skilled labor and a corresponding lack of new entrants has required the need for automating many of the construction equipment used in the construction industry. In particular, excavators are widely used throughout earthwork operations and automating its tasks enables work to be performed with higher productivity and safety. This paper introduces an optimal path generation method which is one of the core technologies required to make "Intelligent" excavators a reality. The method divides a given earthwork area into unit cells, identifies networks created by linking these cells, and identifies the optimal path an excavator should follow to minimize its total transportation costs. In addition, the method also accounts for drainage direction and path continuity to ensure that the generated path considers site specific conditions.

• Korean Journal of Construction Engineering and Management
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• v.20 no.4
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• pp.69-76
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• 2019

This paper presents a method that identifies the unsafe behaviors at the level of near-misses using image analysis. The method establishes potential collision hazardous area in earthmoving operation. It is implemented using a game engine to reproduce the dangerous events that have been accepted as major difficulty in utilizing computer vision technology to support construction safety management. The method keeps realistically track of the ever-changing hazardous area by reflecting the volatile field conditions. The method opens a way to distinguish unsafe conditions and unsafe behaviors that have been overlooked in previous studies, and reflects the causal relationship which causes an accident. The case study demonstrate how to identify the unsafe behavior of a worker exposed to an unsafe area created by dump trucks at the level of near-misses and to determine the hazardous areas.

• Journal of the Korea Institute of Construction Safety
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• v.1 no.1
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• pp.40-46
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• 2018

Only one person should be responsible for many area of works at a small construction sites with less than contract amount of USD 0.3 million. therefore, he can not be an expert in one area. Actually, this kind of small projects are not controlled by the Government because those small size of projects are exempted in following the Government control, due to certain level of small size. The above reason makes those small projects loose with an aspect of safety management without safety consciousness and safety management. The Government makes his effort to decrease nationally accident occurrences but there is considerably deep limitation to achieve a certain level of goal despite a fact that there have been more than 100 workers died annually. It is expected that some proposed management ideas technique with behavior-based safety management can be contributed to decreasing accidents at small construction sites.

• Korean Journal of Construction Engineering and Management
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• v.21 no.3
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• pp.11-19
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• 2020

Since an accident in construction industry has been higher than others for decades, the accident in construction industry should be decreased. To prevention this problem, the work breakdown structure (WBS) and risk breakdown structure (RBS) are presented. the WBS and RBS, are hierarchy structure which can find fatal incident considering type of building and type of work easily and quickly. So, this study aims to develop framework for the integrated WBS-RBS to prevent fatal incident on construction industry. The research process is conducted by following 3 steps: (I) collection of data; (II) classification of data; and (III) development of the integrated WBS-RBS. The result of this study can propose the most dangerous fatal incident aspect of type of building, type of work, and type of accident. Through the result, the decision maker can reduce or eliminate fatal incident considering type of building, type of work and type of accident in construction industry.

• Tunnel and Underground Space
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• v.32 no.5
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• pp.298-311
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• 2022

Some problems, such as aging workers, a decreased population due to a low birth rate, and shortage of skilled workers, are rising in construction sites. Therefore research for smart construction technology that can be improved for productivity, safety, and quality has been recently developed with government support by replacing traditional construction technology with advanced digital technology. In particular, the motor grader that mainly performs road surface flattening is a construction machine that requires the application of automation technology for repetitive construction. It is predicted that the construction period will be shortened if the construction automation technology such as trajectory tracking, automation work, and remote control technology is applied. In this study, we introduce the hardware and software architecture of the smart motor grader to apply unmanned and automation technology and then analyze the traditional earthwork method of the motor grader. We suggested the application plans for the path pattern and blade control method of the smart motor grader based on this. In addition, we verified the performance of waypoint-based path-following depending on scenarios and the blade control's performance through tests.

• 기계와재료
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• v.22 no.4
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• pp.76-83
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• 2010

로봇의 발전 동향을 살펴보면, 기존의 위치 기반제어를 통하여 단순반복 재생 하는 로봇에서 인간과 로봇이 협력할 수 있는 로봇으로 그리고 궁극적으로는 독자적인 작업지능을 갖고서 독립적으로 운용되거나 인간과 공존할 수 있는 로봇으로 개발되어 나아갈 것으로 예상된다. 다만 현재까지의 로봇 기술로는 로봇 독자적으로 완전한 작업지능을 구현하기가 힘들기 때문에 그 중간 단계로써 사람과의 협력 작업을 구현하고 하는 것이다. 이처럼 인간-로봇 협업 기술은 인간의 지능과 로봇의 성능을 결합하여 고도의 작업을 구현할 수 있는 기술로써 로봇의 사용법을 모르는 현장 작업자도 로봇의 말단부를 잡고 손쉽게 로봇에 명령을 지시할 수 있다. 따라서 로봇의 응용 범위가 매우 다양해지고, 특히 로봇 전문인력이 없고 다품종 변량 생산을 주로 하는 중소기업에서의 로봇 활용을 촉진시켜 작업 환경 개선과 생산성 향상이 가능해진다. 또한 제조업용 로봇 분야에서 뿐만 아니라 범용성이 강한 기술로 개인서비스 로봇에서부터 국방, 건설, 의료 등 전문 서비스 로봇에 이르기 까지 폭넓게 적용될 수 있다. 이러한 인간-로봇 협업을 위해 필요한 기술들로는 경량형 로봇팔 기술, 인간-로봇 협조 제어 기술, 인간-로봇 안전 기술, 작업자 편이를 위한 인터페이스 기술 등이 포함되며 향후 기술의 발전에 따라 그 파급효과가 극대화될 것으로 기대된다.

• Fashion & Textile Research Journal
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• v.20 no.6
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• pp.704-712
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• 2018

This study analyzed working postures using the Ovako Working Posture Analysis System (OWAS) to improve work clothes for construction workers. A video taken at a construction work site was stopped at regular intervals and the postures of relevant body parts proposed by OWAS was recorded. Additionally, based on analysis of the working postures code, the level of work action for each postures was classified from stage I to IV. General workers frequently straightened or bent forward at the waist, and used their legs to stand, bend, or walk. Wood workers moved extensively from the waist, keeping their legs relatively straight and their arms held below their shoulders, repeatedly tapping with a hammer weighing less than 10.0kg. Rebar bending workers mainly bent forward at the waist, with both legs bent or standing with one leg bent. Rebar transport and fixing workers walked with the waist straight, and occasionally one or both hands held above the shoulders. Their work also involved holding a hook, which weigh less than 10.0kg, in their hands, and the difficult task of lifting and placing long rebars, which weigh from 10.0 to 20.0kg or more. Concrete pouring workers bent or twisted their back to the side. Therefore, this study suggests that design goals should be different when developing workwear for each type of worker.

• Proceedings of the Safety Management and Science Conference
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• 2012.11a
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• pp.21-30
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• 2012

이동식 크레인과 관련한 안전사고가 다발하고 있음에도 국내 대부분의 건설현장에서는 아직도 관리감독자와 크레인 운전자의 경험에 의존하여 장비를 선정하고 운용하고 있는 실정이다. 본 연구를 통해 건설현장에서 발생한 이동식 크레인 전도사고사례와 위험성 평가를 실시한 결과 이동식 크레인을 이용한 안전한 자재 양중작업을 위하여 중량물의 무게 형상, 인양장비 제원, 정격하중, 작업반경 등을 고려한 중량물 취급작업계획을 작성 준수하고 이동식 크레인의 제작 설계기준 준수를 위하여 이동식 크레인 제조사에서 제공하는 사용(취급)설명서를 준수하며 위험성 평가 결과가 실제 이동식 크레인을 사용한 양중작업에 적용 가능하도록 지속적인 관리 등이 요구됨을 알 수 있었다.