Earticle

철재화물의 항만하역 작업 시 재해비율은 26.3%이며, 이는 취급하는 화물 중 재해발생 비율이 가장 높은 화물인 것으로 나타났다. 이러한 측면에서 철재화물 하역 시 발생할 수 있는 사고 요인을 분석하고, 요인 간의 중요도 우선순위를 도출하고자 한다. 요인도출을 위해 선행연구 및 경력전문가와 In-depth Interview를 실시하여 요인을 도출하고 Fuzzy-AHP 를 이용해 안전요인의 우선순위를 도출하였다. 인적요인, 장비 및 설비, 안전교육, 기업환경 등 4개 상위 요인과 각각 4개의 세부요인을 통해 분석을 실시했다. 상위요인 분석결과에서는 인적요인, 안전교육, 장비 및 설비, 기업환경 순으로 가중치 순위가 나타났다. 세부요인의 요인별 우선순위는 작업자의 안전의식(0.728), 화종에 따른 적정 장비투입(0.345), 작업안전훈 련(0.304)순으로 나타났다. 본 논문은 요인 간 상대적 중요도를 도출함으로 현장 작업자 및 기업의 안전의식 제고와 항만하 역사고의 재해발생률을 감소하는데 기여가 있다. 향후 컨테이너화물 등 여타 재해비율이 높은 화물들을 대상으로 한 추가연 구 및 집단을 구분한 연구가 필요하다.

In this paper, we analyze accident factors that occur in the unloading of steel cargoes and try to derive priority of importance among factors. The Fuzzy-AHP, which enables hierarchical analysis through pairwise comparison of factors, is used to derive priorities of safety factors to consider when unloading steel cargo. In the top factor analysis results, weights were ranked in order of human factors, safety education, equipment and facilities, and business environment. The purpose of this paper is to contribute to the improvement of the safety consciousness of the field workers and enterprises and to reduce the incidence of accidents in the unloading and unloading operations by deriving the relative importance between the factors. In the future, it is necessary to study the cargoes of other disasters such as container cargo as well as steel cargo.

Finite Element Analysis (FEA) was conducted to verify the structural safety of thruster disc brakes applied to quay cranes. Since these disc brakes are continuously exposed to heavy loads and repetitive braking conditions, ensuring sufficient structural reliability is of paramount importance. SS410 was applied as the frame material and STS405 as the pin material, and structural analysis incorporating the respective material properties was performed using ANSYS Workbench. Based on a minimum operating range of 0.5 mm, the analysis yielded a maximum deformation of 0.52 mm, an equivalent stress of 231.79 MPa, and a shear stress of 79.09 MPa in the frame; the resulting safety factor of 1.77 confirmed that stress remained below the yield strength of SS410 (410 MPa), verifying structural safety under normal operating conditions. Under the maximum operating range of 3.0 mm, a maximum deformation of 3.13 mm, an equivalent stress of 340.26 MPa, a shear stress of 155.54 MPa, and a safety factor of 1.2 were obtained, all remaining below the yield strength limit of the frame material. Although stress concentrations were localized primarily in the frame region, both components remained within their respective yield limits. The results confirm the brake's structural integrity under normal operating conditions, though the 3.0 mm case warrants design refinement to meet the recommended safety factor of 1.5. Subsequent studies will address fatigue life, thermo-structural coupling, and dynamic loading to further validate and improve the design.

The flange spreader has been used to withdraw gaskets and valves during butterfly valve maintenance. When using the conventional flange spreader, an excessive working space (pipe separation distance) appears, and the pipe and flange are damaged by the load. Also, the equipment can’t be operated safely when the pipe has eccentric fitting. To solve the problems, a valve easy out tool with collet was developed for safely fixing and spreading flange. By using Ansys Workbench 2021 R2, the structural analysis of the original collet was performed, and shape design of the collet was carried out to improve structural safety.

Roto cap is usually used to diesel engine, especially, big-sized diesel engine such as ship, power plant and so on. Intake and exhaust valves are essential parts of diesel engine and thus roto cap is one of the most important parts of intake and exhaust valves. Roto cap consists of body, disc spring, spring & steel ball, retainer and stop ring. In this study, the body and disc spring in parts of roto cap were simulated using static structural analysis. The purpose of this study is to achieve the data for designing and improving the roto cap. As the results, the body of roto cap showed safety factor of 6.3 in even 2 times of 1370N(target load) and the disc spring showed safety factor of 4.9 in 2370N load.

본 연구에서는 하천 제방에 대한 홍수취약성을 평가하는 새로운 기법으로 제방홍수취약성지수를 제안하였고 제방홍수취약성 지수를 산정하는데 있어 필요한 인자를 적용하는 방법에 대하여 알아보고자 한다. 이를 위해 먼저 대상 제방의 계획홍수위를 적용하여 제방의 안전율을 분석하였고, 제방의 인자들로는 여유고, 둑마루폭, 제방단면의 비, 활동안전율, 턱(소단)의 길이, 침윤선 길이 비, 한계유속으로 7가지의 인자들을 바탕으로 제방홍수취약성지수를 산출하였다. 이를 활용하여 제방의 취약성 분석을 실시하고 분석결과를 제방홍수취약성지수(Levee Flood Vulnerability Index, LFVI) 값을 이용하여 1～7등급으로 나 누어 제방의 취약성을 평가하였다.

In this study, we propose a new method for evaluating the vulnerability to flooding river levee. The purpose of this study is to examine how to apply the factors necessary to calculate the proposed levee flood index. To do this, the safety flood level was analyzed by applying the planned flood level. The levee flood vulnerabilities index was calculated based on seven factors such as freeboard, levee crown section, levee section ratio, safety factor, raised spot length, Seepage line change degree, and critical velocity. The Levee Flood Vulnerability Index(LFVI) of the levee developed in this study was used to levee vulnerability analysis. The results of the analysis were divided into 1 to 7 grades using Levee Flood Vulnerability Index(LFVI).

연구목적 : 본 연구는 기후변화에 따른 강우량 및 강우패턴을 분석하여 강우시 비탈면 거동 을 파악하기 위해 강우사상을 합리적으로 적용하여 절토부 비탈면 안정성해석에 활용하고 자 수치해석기법을 이용하여 비탈면 높이별, 강우사상별 침투해석을 실시하여 강우사상 및 강우지속시간에 따른 지하수위 변화를 고려한 비탈면 안정성검토를 실시하였다. 연구결과 : 강우사상(Uniform Rainfall, US Army Corps., Huff 4분위법 중 1/4법 및 4/4법) 에 따른 화강풍화토 비탈면의 수치해석결과 비탈면이 높을수록 침투된 강우가 지하수위까 지 빠르게 도달하지 못하여 지하수위 상승은 작아지고, 비탈면의 안전율도 작게 분석되었다. 결론 : 초기강우강도가 제일 큰 강우패턴 Case 3조건인 Huff 4분위법 중 1/4법에서 지하수 위 상승량이 제일 크게 나타났으며, 안전율은 가장 작게 나타났다.

Purpose: This study conducted a slope stability study considering changes in the ground water level due to rain phenomena and the duration of rainfall, that is for the purpose of analyzing the stability of the slope surface of the cut section, seepage numerical analysis is performed by height of slope and rainfall accident, and the characteristics of rainfall was applied reasonably in order to determine the slope change during rain by analyzing rainfall and rainfall pattern due to climate change. Results: As a result of numerical analysis of stability for slope composed of the granite weathered soils according to the characteristics of rainfall(Uniform Rainfall, US Army Corps., Huff’s method – 1/4, 4/4), Conclusion: The higher the slope, the smaller the safety factor of the slope, the smaller the elevation of the ground water level as the rainwater seepage does not reach the underground water level. In addition, the ground water level was assessed to be rose significantly in condition of case 3 Huff’s method–1/4, rain pattern with the largest initial rainfall duration, and the safety factor was analyzed to be small.

본 연구는 땅밀림 산사태 위험지를 대상으로 외적 요인인 강우사상과 내적 요인인 지하수위 변화를 고려한 땅밀림 산사태의 원인을 파악하고 이의 안정성 평가를 목적으 로 수행되었다. 연구지역 전방에 위치한 저수지 수위를 인위적으로 3m 하강시킨 결과, 땅밀림 산사태 발생 지반 내 지하수위는 0.31∼1.13m 범위에서 하강하는 것으로 측정 되었다. 저수지 수위 3m 하강 후 측정된 지하수위와 5m 하강 가정 시 예상되는 지하 수위를 이용하여 안정해석을 수행한 결과, 건기시 안전율은 변화가 없으나 우기시 및 지진시 안전율은 점차 상승하는 것으로 나타났다. 특히 저수지 수위 3m 하강 시부터 우기시 안전율은 허용안전율 1.3을 상회하는 것으로 분석되었다. 대책공법 적용을 가정 한 안정해석 결과, 연구지역에서는 저수지 수위 약 17% 하강을 통해 공사비를 절반가 량 줄일 수 있는 것으로 나타났다.

The purpose of this research was to investigate the causes of deep landslide induced by the external factor (rainfall events) and internal factors (variations of groundwater level). As a result of artificially lowering water level of nearby reservoir by 3m, the groundwater level in the deep landslide area was measured to drop in the range of 0.31∼1.13m. We carried out successively the stability analysis using groundwater level measured after lowering a reservoir water level by 3m and expected after lowering a reservoir water level by 5m. In result, the safety factor at dry condition has not changed, but the safety factor at wet and earthquake condition has gradually increased. Especially from the time when the water level of the reservoir was lowered by 3m, the safety factor at wet condition was analyzed to exceed the allowable safety factor (1.3). As a result of the stability analysis assuming the application of the countermeasure, in the research area, it was found that the cost of construction could be reduced by half through about 17% drawdown of the reservoir water level.

이 연구의 목적은 해양사고 예방, 해양안전문화 정착을 위해 시행되고 있는 선사CEO 해양안전리더교육의 만족도를 분석하는데 있다. 또한 해운선사 안전경영 실현을 위해서 우선적으로 고려해야 할 중요요인을 도출하는데 있다. 이를 위해 해양안전리더교육을 조사․분석하였다. 특히 6개의 교육 프로그램에 대하여 교육 참여자(연안여객선사, 화물선사)를 대상으로 만족도를 분석하였다. 그 결과 2개의 교육 프로그램(선박조종시뮬레이션 실습, 안전경영전략)에 만족도의 차이가 있는 것으로 나타났다. 그리고 해운선사 최고경영자의 안전경영 실현을 위해 우선적으로 고려되어야 할 요인을 도출하였다. 중요요인은 선박검사제도, 선원정책, 재정지원책, 최고경영자 교육, 해기사 및 선원 교육, 선박안전설비, 항로환경정비로 파악되었다. 향후 이분석결과를 토대로 해양안전리더교육 프로그램의 개선 개선에 활용한다면 보다 실제적이고 효율적인 교육이 이루어질 것이고 해양안전문화 정착을 위한 정책 수립에 활용될 수 있을 것으로 기대된다.

This paper aims to analyze the satisfaction of the maritime safety leader education, which is being implemented to prevent marine accidents and to establish marine safety culture. In addition, it is to derive important factors that should be considered firstly for the realization of safety management on shipping company. To do this, we surveyed and analyzed marine safety leader education. Particularly, the satisfaction of the participants (coastal passenger ship and cargo ship companies) about six education programs was analyzed. As a result, there was a difference in satisfaction with two programs such as ship handling simulation training and safety management strategy. We have also drawn up factors that should be considered for the realization of safety management by CEO of shipping company. Important factors were identified as vessel inspection system, seafarers’ policy, financial support system, education for CEO and seafarers, ship safety facilities and improvement of route environment. Based on the results of this analysis, it will be more practical and effective to use the data to improve the maritime safety leader education program. It is also expected to be used to establish policies for the settlement of marine safety culture.

일반화된 Hoek-Brown (GHB) 암반파괴기준식의 약점 중 하나는 이 식을 명시적인 Mohr 포락선식으로 변환하는 것이 어렵다는 점이다. 암반공학에서 활용되는 주요 수치해석 기법들은 파괴기준식이 Mohr 포락선 형태로 표시될 수 있을 때 활용범위가 훨씬 더 넓어진다. 이 연구에서는 Lee (2018) 의 연구를 바탕으로 암반의 전단강도를 더욱 정확하게 근사할 수 있는 GHB식의 근사 Mohr 포락선식을 제안하였고 그 정확성을 검증하였다. 제안된 Mohr 파괴포락선식을 Bishop의 간편법에 적용하여 암반사면의 평면파괴 안전율을 계산하였고, 그 결과를 Hoek et al. (2002)이 제안한 선형근사Mohr 포락선을 적용한 결과와 비교하였다. 0 < GSI < 80 범위에서는 선형근사 Mohr 포락선을 사용할 때 비선형 Mohr 포락선을 사용하는 경우보다 안전율이 과대평가 되었다.

A weakness of the generalized Hoek?Brown (GHB) criterion is the difficulty of converting it into an explicit Mohr envelope equation. Many important numerical analysis techniques in rock engineering would have a wider scope of applications if a failure criterion in the form of a Mohr envelope is available. In this paper, based on the study of Lee (2018), an approximate Mohr envelope equation of the GHB criterion that can more accurately approximate the shear strength of the rock mass is proposed, and its accuracy is verified. The proposed Mohr envelope equation was applied to Bishop’s simplified method to calculate the factor of safety for the plane failure of a rock slope. The results were compared with those obtained by applying the linear approximate Mohr envelope of Hoek et al. (2002). In the range of 0 < GSI < 80, the factor of safety was overestimated when the linear Mohr envelope was used compared with using the nonlinear Mohr envelope.

목적 : 본 연구는 가정환경수정을 통한 노인의 안전 위험요인 감소가 기능장애수준에 미치는 영향을 알아보고자 하였다. 연구방법 : 연구 대상은 광주광역시 서구에 거주하고 지역사회 통합돌봄(Community care) 서비스를 받는 65세 이상의 노인 중, 가정환경수정 서비스를 받을 수 있는 여건이 갖추어진 127명을 대상자로 선정하였다. 연구 기간은 2020년 1월부터 2021년 8월까지였으며, 평가도구는 가정 내 안전 위험요인을 파악하기 위해 한글판 낙상 위험주거환경 평가 (HOME FAST)와 주거환경문제 체크리스트를 사용하였고, 대상자의 기능장애수준을 알아보기 위해 세계보건기구 장애평가목록(WHODAS 2.0)을 사용하였다. 대상자의 욕구에 따라 가정환경수정 중재를 적용하였으며, 재평가를 통해 효과성을 살펴보았다. 결과 : 대상자의 기능장애수준에 미치는 영향을 분석한 결과, 일반적 특성보다는 낙상 위험환경 요소가 상대적으로 높 은 영향을 미치고 있는 것으로 확인되었으며, 가정환경수정 전과 후 차이 결과에서는 낙상위험환경과 주거환경 문 제 부분에서 통계적으로 유의한 차이를 보였다(p<.001). 기능장애수준은 모든 영역에서 향상되었는데(p<.001), 그중 에서도 돌아다니기(8.74), 참여하기(8.11), 일상생활 활동(4.10) 영역 순으로 큰 변화량을 보였다. 결론 : 대상자의 욕구에 맞는 가정환경수정을 통해 낙상 및 주거환경 문제가 통계적으로 유의하게 감소하는 변화를 나타냈으며, 기능장애수준의 변화에서도 통계적으로 유의하게 향상되어 긍정적인 변화를 보이는 것으로 확인되었 다. 지역사회 통합돌봄(Community care) 사업으로 영양, 운동, 돌봄 서비스 등 개인의 상태 개선뿐 아니라 가정환경 수정은 대상자의 기능장애수준 향상에 도움이 되었고, 추후 맞춤형 가정환경수정 서비스 정착에 도움이 될 것으로 사료된다.

Objective : This study was to investigate the effect of reducing safety risk factors in the elderly through home modification on the level of functional disability. Methods : Among the subjects of the study, 127 elderly people aged 65 years or older who lived in Seo-gu, Gwangju Metropolitan City and received community care services, who had the conditions to receive home modification services, were selected as subjects. The study period was from January 2020 to August 2021, and the evaluation tool used the Korean version of the fall risk residential environment assessment (HOME FAST) and the residential environment problem checklist to identify safety risk factors in the home, and the subject's function The World Health Organization Disability Assessment List (WHODAS 2.0) was used to determine the level of disability. According to the evaluation result, home modification intervention was applied according to the subject's desire, and the effectiveness was examined through re-evaluation. Results : As a result of analyzing the effect on the level of functional disability of the subjects, it was confirmed that the fall risk environment factors had a relatively higher impact than the general characteristics. showed a statistically significant difference (p<.001). The level of functional disability improved in all areas (p<.001), and among them, Life activities, Mobility and Participation showed the greatest change in order. Conclusion : Through the modification of the home environment to meet the subject's needs, falls and residential environment problems were statistically significantly reduced, and it was confirmed that the change in the level of functional disability was also statistically significantly improved. In the future, by continuing the home modification service in the community care project, not only the elderly but also all people with disabilities, such as the disabled and children living in the community, participate in activities on their own to live a self-directed life. Efforts are needed to nurture experts, collaborate, and expand service support.

This study was attempted to analyze risk factors and suggest accident prevention in live line works for power transmission lines to be developed and applied in Korea. Safety problem cannot but occur at development of live line works and application to the field. With respect to this, problems likely to occur in the field among works adopting methods of works including live line works for power transmission lines were investigated and analyzed through documentary survey and risk assessment method. The results are summarized as follows. A risk assessment method model was suggested. This method enables scientific and systematic development of safety control. That is, the owner may autonomously induce safety control and build risk assessment database by work process to use them as best training data for workers. Also, in the field, it may induce all workers to participate in safety program and secure safety by making workers seek for safety working method under smooth flow from looking at risk factors to accident prevention activities. It is deemed that this humble study will prevent both accident and injury likely to occur in live line works for power transmission lines.

본 연구의 목적은 코로나19 이후 오프라인 MICE 행사의 필수요건이 될 방역 및 안 전관리요인을 중심으로 참가자 관점에서 MICE 선택속성을 분석하는 것으로, 이를 통해 포스트코로나시대 MICE 참가자들의 심리적 불안을 줄임과 동시에 오프라인 MICE 행사 개최를 위한 실무적 시사점을 도출하고자 하였다. 연구 목적 달성을 위해 먼저, 코로나19 이후 오프라인 행사 가이드라인을 바탕으로 1 차 측정항목을 구성하였으며, 전문가 협의를 거쳐 참가자 관점에서 설문항목을 수정‧보 완하고 최종적으로 선정하였다. 둘째, 구조화된 설문지를 바탕으로 오프라인 MICE 행 사 참가자를 대상으로 설문조사를 통해 응답을 수집하였다. 마지막으로 수집된 자료를 바탕으로 수정된 IPA를 통해 분석을 실시하고 결과의 시각화를 위해 IPA Matrix를 제 시하고 이에 따른 대면 행사 개최방안에 대한 시사점을 도출하였다. 연구 결과, MICE 참가자들은 코로나19 이후 위험 및 안전관리요인으로 출입통제 및 입장 제한, 다중이용시설 청소 위생 및 소독 강화, 참가자 위생 및 손세척 공간 확대, 비대면 등록절차 확대, 방역 안내배너 설치, 동선표시를 통한 이동경로 관리, 행사장 참가자수 제한 등을 중요하게 생각하는 것으로 분석되었다. 반면, 임시 격리장소 마련, 파티션 설치로 스탭과 참가자 분리, 방역용품 제공은 상대적으로 중요하지 않은 것으 로 분석되었다. 또한 비대면 등록절차 확대, 참가자 위생 및 손세척 공간 확대, 다중이용시설 청소 위생 및 소독 강화를 통해 대면 행사 참가에 대한 만족도와 높게 유지할 필요가 있으 며, 실시간 참가자 모니터링 및 현장대응, 비접촉정책 시행 및 기술 사용, 동선표시를 통한 이동경로 관리, 행사장 참가자수 제한을 통해 방역 안전성을 확보하고 참가자들 이 안전하게 오프라인 행사를 참가할 수 있도록 해야 할 것이다.

The purpose of this study is to analyze the MICE selection attributes from the participant's point of view, focusing on the quarantine and safety management factor, which will become an essential requirement for face-to-face MICE events after COVID-19. To achieve the purpose, first, the measurement items were composed based on the face-to-face event guidelines issued by the government and associations. Second, 201 responses were collected through a questionnaire survey by offline participants in the 2020 Jeoungseon Forum. The Revised IPA was conducted and the IPA Matrix was presented for visualization of the results. As a result, MICE participants were subject to the quarantine and safety management factor after COVID-19, including ‘access control and entry restrictions’, ‘strengthening sanitation and disinfection for cleaning multi-use facilities’, ‘expanding hygiene and hand washing spaces for participants’, ‘expanding non-face-to-face registration procedures’, ‘installing quarantine guide banners and moving lines’. It was analyzed that‘management of the movement route through display’ and ‘limiting of the number of participants in the venue’ were considered important. On the other hand, it was analyzed that ‘provision of a temporary quarantine place’, ‘separation of staff and participants’, and ‘provision of quarantine supplies’ were relatively insignificant. Besides, it is necessary to maintain high satisfaction with the participation in face-to-face events by ‘expanding non-face-to-face registration procedures’, ‘expanding the sanitation and hand washing spaces for participants’, and ‘strengthening sanitation and disinfection for cleaning multi-use facilities’. Also, it is necessary to secure quarantine safety and to enable participants to safely participate in offline events by ‘management of the movement route through display’, and ‘limiting the number of participants in the venue’

본 연구는 노인요양시설의 종사자들이 인식하는 안전사고 발생요인이 안전사고에 대한 인식사고를 통해 안 전사고 대응지식에 영향을 미치는 매개경로에서 노인돌봄태도에 따른 차이가 나타나는지 조절된 매개효과를 통 해 살펴보고, 연구결과에 따른 실천적 제언을 하는 것이 목적이다. 연구방법은 설문지를 통한 조사연구이고, 충 북의 어느 시 지역 요양보호사 321명을 대상으로 실시하였다. 주요 연구결과와 함의는 첫째 안전사고 발생요인 은 안전사고 인식수준과 안전사고 대응지식에 대하여 유의미한 직접효과를 나타내는 것으로 나타났다. 둘째, 안 전사고 발생요인이 안전사고 인식수준에 미치는 정(+)적 효과가 촉진되었다. 셋째, 안전사고 대응지식에 미치는 효과가 노인돌봄태도의 수준에 따라 달라짐을 확인하였다. 연구결과를 토대로 실천적 제언은 첫째, 안전관리를 위한 자료 구축 및 체계적인 모니터링이 요구된다. 둘 째, 안전관리 전담인력 배치와 장기요양 수가의 반영이 요구된다. 셋째, 요양보호사들의 돌봄서비스에 대한 지 속적인 슈퍼비전 제공을 위한 체계가 요구된다.

Nursing facilities for senior citizens are subject to frequent safety accidents due to the characteristics of the facilities, and given the characteristics of the facilities’ residents, even small risk accidents impact the senior citizens, and hence, the damages are much larger relative to other facilities. A systematic safety management for safety may be said to be extremely crucial since safety accidents at such facilities could negatively impact the health of the residents as well as the stability of the facilities’ operation. This study is one which aims to explore the intervention methods of improving the responsive knowledge on the safety accidents at the nursing facilities for senior citizens, which also has the purposes of examining what differences in the attitude of caring for senior citizens in the mediating path which influences the responsive knowledge of safety accidents through the regulated mediation effect, and of providing practical recommendations as per the research results. The main research results and implications are such that, first, in the simple mediation model where the regulation variable of the attitude of caring for senior citizens was not input, the safety accidents’ occurrence factor turned out to have a significantly direct effect on the level of awareness for the safety accidents and the responsive knowledge for the safety accidents. Second, as for the effect of the safety accidents’ occurrence factors on the level of awareness of safety accidents, the positive effect of the safety accidents’ occurrence factors on level of awareness of safety accident was promoted for the attitude of caring for senior citizens. Third, it was confirmed that the effect of the safety accidents' occurrence factor on responsive knowledge of safety accidents through the level of awareness of safety accident varies according to the level of attitude of caring for senior citizens. Accordingly, based on the research results, the following are the practical recommendations offered. First, development of the data for safety management and preparation of a systematic monitoring through the improvement of the facility environment for the safety accident factor and the continuous monitoring of accident occurrence factor are required. Second, deployment of personnel in charge of the safety management and reflection of the charges for long-term care are required. Third, since it was confirmed that the effect of safety accidents’ occurrence factor on the responsive knowledge of safety accidents through the level of awareness of safety accidents varies according to the level of attitude of caring for senior citizens, a system for the provision of continued super vision for the caring services of the nursing caregivers is required.

When the foundation work of the underground part of the building structure or the excavation work of the civil engineering structure is carried out, there is the earthwork work by the inevitable process. As the economic situation continues to develop, construction in urban areas is becoming bigger and higher in scale due to the expansion of infrastructure and the rescue of urban dwellings in urban areas, and excavation of underground roads is inevitable. Excavation of the underground part may cause problems in the process difficulty and safety of the earthworks due to the complexity and various characteristics of the ground selected without consideration of the ground characteristics and site conditions. In order to complete the required facilities, it is necessary to secure the design and construction of the retaining walls. In order to complete the required construction, It is an important factor satisfying construction period and economical efficiency.

In this paper, in order to study the relationship between the safety culture of highway management agencies and disaster reduction activities (BCMS), a measurement tool was identified through previous research on safety culture, and the validity of the measurement tool was confirmed through exploratory factor analysis. I want to check. The subjects of the study were workers belonging to disaster reduction activity management system certification organizations among highway management organizations. The highway management agencies are the Korea Expressway Corporation, which manages the functional continuity of national highways nationwide, and 8 of the 21 private road agencies that manage the functional continuity of the highways. The safety culture measurement tool is an indicator that measures safety culture factors, and is reorganized by the researcher based on survey items from previous studies, with management/manager safety values and attitudes, safety communication, safety education and training, and safety regulations/ management system as subfactors. A total of 24 questions were comprised of the survey tool. As a result of the study, the result of exploratory factor analysis was that the safety culture scale was extracted into four factors based on theoretical grounds, and the total cumulative variance was 80.360%. When checking the questions for each factor, it was found that all the questions loaded on the factor that was originally intended to be measured. Factor 1 is management, factor 2 is safety, and factor 3 is communication., Factor 4 was named education. Number of questions: 4 management questions, 3 safety questions, communication It consisted of 4 questions and 2 education questions.