• 한국안전학회지
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• 제31권3호
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• pp.116-122
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• 2016

With the changes of industrial structure, contents and types in hazardous and dangerous works have been changed considerably. However, the hazardous and dangerous works by defined "Regulation for the hazardous and dangerous work employment restriction" and "Special education for safety and health"have not been amended over twenty years. This study aimed to identify the recent trends of the works by analyzing the death accidents cases from 2004 to 2013 and to present the management methods about future hazardous and dangerous works. The results showed that amount of 1,972 cases among 11,513 death accidents were equivalent to the works presented by "Regulation for the hazardous and dangerous work employment restriction". The amount of death accidents in 'Work of using construction equipment following construction machinery management act' was biggest among the death accidents cases and that of 'Work of handling pressure vessels following high-pressure gas safety control act' didn't show up. For the works in "Special education for safety and health"amount of 1,650 death accidents cases were equivalent. The amount of death accidents in 'Work involving a crane with a capacity of 1 ton or more or work which is carried out with a crane or hoist with a capacity of less than 1 ton in a workplace having at least 5 such machines' presented by "Special education for safety and health"was biggest. Also, death accidents case didn't occurred in three works presented by "Special education for safety and health". It was analyzed that works with low death accidents cases should be needed to study thoroughly the whole disaster research involving nonfatal accidents. Through this study, it was expected that regulation can be operated practically in the industrial field. Also, it is considered to increase

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2019년도 춘계학술대회
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• pp.27-31
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• 2019

건설 현장에서는 건설 기계의 운전 미숙, 안전 설비 미비 등으로 인해 각종 안전사고가 빈번하게 일어나고 있다. 그 중 타워크레인에 대한 안전사고는 막대한 인명 및 재산 피해가 발생하고 있다. 따라서 본 연구에서는 타워크레인의 안전 사고를 예방하기 위한 안전 장치를 개발하는데 그 목적이 있다. 이를 위해 기존의 안전 장치를 탐색한 후 아두이노를 활용하여 타워크레인 모형을 제작하였다. 물건의 무게, 추의 무게 그리고 중심 축과의 거리를 변인으로 한 실험과 돌림 힘 공식에 따라 기존 안전 장치의 문제점을 파악하고 이를 해결할 수 있는 안전장치로서 이동형 추를 제안하였다. 이는 타워 크레인의 인양거리 범위 제한을 최소화할 수 있어 안전사고의 위험에서 벗어나 보다 안전한 작업 환경을 제공해줄 수 있으리라 기대한다.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.250-256
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• 2009

This paper presents a robotic tower-crane system using encoder and gyroscope sensors as path tracking devices. Tower crane work is often associated with falling accidents and industrial disasters. Such problems often incur a loss of time and money for the contractor. For this reason, many studies have been done on an automatic tower crane. As a part of 5-year 23-million-dollar research project in Korea, we are developing a robotic tower crane which aims to improve the safety level and productivity. We selected a luffing tower crane, which is commonly used in urban construction projects today, as a platform for the robotic tower crane system. This system comprises two modules: the automated path planning module and the path tracking module. The automated path planning system uses the 3D Cartesian coordinates. When the robotic tower crane lifts construction material, the algorithm creates a line, which represents a lifting path, in virtual space. This algorithm seeks and generates the best route to lift construction material while avoiding known obstacles from real construction site. The path tracking system detects the location of a lifted material in terms of the 3D coordinate values using various types of sensors including adopts encoder and gyroscope sensors. We are testing various sensors as a candidate for the path tracking device. This specific study focuses on how to employ encoder and gyroscope sensors in the robotic crane These sensors measure a movement and rotary motion of the robotic tower crane. Finally, the movement of the robotic tower crane is displayed in a virtual space that synthesizes the data from two modules: the automatically planned path and the tracked paths. We are currently field-testing the feasibility of the proposed system using an actual tower crane. In the next step, the robotic tower crane will be applied to actual construction sites with a following analysis of the crane's productivity in order to ascertain its economic efficiency.

• 한국건설안전학회 논문집
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• 제2권2호
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• pp.76-81
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• 2019

무인타워크레인의 운전자격 취득이 쉬워지고 불법개조가 늘어나며 소규모 건설현장에서도 무인타워크레인이 점차 활용되고 있다. 그러나 운전경험이 부족한 타워크레인 운전자의 문제가 커지면서 안전사고도 늘고 작업자도 사고위험에 노출되고 있다. 본 연구에서는 무인타워크레인 사고를 분석하여 사고 원인을 도출하였다. 그 후, 사고 원인의 중요도를 도출하기 위해 AHP 기법을 사용하여 분석하였다. 이 연구의 결과는 무인타워크레인을 사용하는 사업자와 건설 노동자들이 작업 규칙을 따르지 않는다는 것이다.

• 한국안전학회지
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• 제28권6호
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• pp.64-72
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• 2013

Construction machinery has been utilized to carry out construction works effectively. Using construction machinery enables a builder to reduce the time and the cost needed for the construction, but the fatal accident caused by it has been increased. This study is intended to identify risk magnitude of accident by kind of construction machinery through interviews with experts. Construction machineries surveyed in this research are excavator, tower crane, lift, mobile crane and forklift, those are the machinery which accident occurs more often than the other machinery. To evaluate the risk of the accidents identified, risk category was determined according to the US DOD system safety program (MIL-STD-882B) considering the risk degree and intensity. As a result, accident occurred in the process of material transport & handling was found to be the most dangerous. On the other hand, the accidents caused by the defective machinery and the poor safety gear were considered to be less dangerous relatively. The risk category by type of construction machinery suggested in this study is expected to provide the basic data in developing the safety guidance for construction project.

• 한국해양공학회지
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• 제17권3호
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• pp.33-38
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• 2003

This study focuses on an analytical approach to calculate crane-lifting forces for a sunken ship, with consideration to elongation of crane ropes. The method takes into account the relation of lifting forces acting in wire rope slings to the inclination of the ship's hull, including the effect of lug positions. For lifting analysis, the Euler angles are defined to represent the inclination of a sunken ship in developing the static force and moment equations. An additional compatibility condition is introduced in order to solve an indeterminate lifting analysis problem with 4 cranes. A set of lifting forces along the 4 crane ropes is calculated. A 3-dimensional example of the G/T 1500 oil tanker is analyzed. The results show that the information obtained by the method could be useful to engineers when conducting salvage work.

• 한국건설관리학회논문집
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• 제9권6호
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• pp.164-174
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• 2008

건축공사의 규모가 대형화, 고층화, 복잡화됨에 따라 자재, 노무, 장비 등의 물류량의 증가로 건설장비의 사용이 증가하고 있다. 특히, 고층빌딩 신축 및 공장건설 등으로 건설장비 중 이동식 크레인의 사용빈도가 증가하고 있다. 이러한 이동식 크레인의 사용 증가와 함께 크레인 관련 중대재해사례도 증가하고 있다. 크레인 관련 중대재해사고를 줄이기 위해서 안전성 검토를 위한 연구의 필요성이 제시된다. 본 연구는 이동식 크레인의 슬링 및 러그의 선정과 안정성 검토를 위한 연구를 실시하였다. 이 연구결과는 이동식 크레인의 효율적인 선정과 작업안정성 확보에 큰 기대효과를 가질 것이다.

• 한국재난정보학회 논문집
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• 제19권3호
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• pp.719-728
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• 2023

연구목적: 이동식크레인은 높은 사망률에 기여하는 기계로 최근 6년간(2016~2021) 사고사망사례 중 건설업 2,574건을 분석한 고위험요인(SIF)정보에서 이동식크레인의 사고는 총 61건의 재해가 발생하였다. 현장의 안전대책에도 불구하고 제대로 활용이 안되고 있다. 본 연구에서는 표준 리스크 평가 지수를 제시하여 사고예방에 기여하고자 한다. 연구방법: 전문가 면담과 사망사고 사례분석, 현장실태분석, 문헌조사를 통해 위험성평가의 4M방식의 표준 리스크 평가 지수 방법을 제시하고자 한다. 연구결과: 현장 8개현장 위험성평가를 분석한 결과 재해예방에 실질적인 기여를 할 수 없다는 결론을 얻었으며, 표준 리스크 평가 지수 방식의 개선방안으로 적용하여야 한다. 결론: 건설현장에서 표준 리스크 평가 지수방식으로 전환함으로써 안전보건관계자 및 근로자가 쉽게 이용할 수 있고 재해감소에 기여할 수 있을 것으로 제안한다.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.179-187
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• 2020

This paper investigates the construction equipment accidents by time. Construction sites are unique with many different hazardous conditions which cause accidents. According to the Occupational Safety and Health Administration (OSHA), accidents related to construction equipment are one of the most leading causes of fatal injuries in the construction industry. While there have been many studies investigating the equipment-related accidents, few research studies provided in-depth analyses about the time that accidents frequently occurred. By using the OSHA accidents data collected between 1997 and 2012, this paper analyzed the accidents data by time, equipment type including excavator, backhoe, dozer, and crane, accident cause, and injury class. The analyses revealed that the time window with most accidents was between 13:00 and 13:59. In terms of the injury class, the time windows with the highest numbers of equipment accidents were between 13:00 and 13:59 and between 11:00 and 11:59 for fatality and hospitalization, respectively. For the accident causes, equipment operator's error was the highest number of accident causes. It is expected that findings from the analyses can be used to more strategically develop management plans and guidelines to prevent accidents related to construction equipment to practitioners.

• 한국안전학회지
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• 제16권4호
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• pp.147-152
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• 2001

The tower cranes are the very useful construction machine in the high place works. But they are very susceptible to the load balance, the wind load and the hanging load because they are the very slender structures and those center of gravity is located in the upper part. Therefore, the collapse accidents of tower one have repeatedly happened during the assemble or disassemble works. The correcting frame may has often used in order to correct the error in the setting of foundation anchors. The goal of this study is that propose the methods preventible the collapse accident of tower crane which is constructed by using the correcting frame. In order to accomplish the goal of this study, the field survey, the reference investigation and the structure analysis were performed for the collapse accident of tower crane using the correcting frame. This study result in the methods preventible the same accident.