• Journal of Korean Society of Transportation
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• v.10 no.3
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• pp.123-140
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• 1992

지방도로의 포장 및 확장사업으로 인한 지역개발효과를 분석하였다. 효과발생시 시기적 특성을 기준으로 할 때, 도로개선사업의 지역개발효과는 직접효과, 유발효과 및 간접효과 등 세가지의 유형으로 구분될 수 있다. 이들 각 유형의 효과가 각각 어떻게 발생되는가를 파악하기 위하여 본연구에서는 교통부문, 농업부문, 공업부문, 공공 서비스 부문, 주거부문 및 인문사회부문 등 6개부문에 대한 도로개선 사업의 효과를 분석하였다. 분석은 ADB 5차사업으로서 1983년에 공사를 시작하여 1985년에 사업이 완료된 밀양 및 하동지구를 그 대상으로 하였다. 도로개선사업의 효과가 사업종료 후 어느 시점에서부터 발생되는가를 관찰하기 위하여 효과분석을 위한 자료수집의 시점을 사업전 (1983년), 사업완료 직후(1986년) 그리고 사업완료 5년후(1992) 등 크게 세가지로 구분하였다. 1983년 및 1986년의 자료로는 건설부에서 조사한 자료들을 이용하였으며, 1992년의 자료는 현장조사와 해당군의 통계에서 수집된 자료를 이용하였다. 도로사업으로 인한 순효과를 측정하기 위하여 본 연구에서는 각 대상지역을 사업지구(Project Area)와 대조지구(Control Area) 로 구분하고 이들 각 지구에 대한 시점별 분석들 실시하였다.

• Korean Journal of Construction Engineering and Management
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• v.12 no.5
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• pp.103-116
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• 2011

Crack sealing is a maintenance technique commonly used to prevent water and debris penetration and reduce future degradation in pavement. In recent years, several systems for automatically routing and sealing pavement cracks have been developed in the highway construction and maintenance area. Automating pavement crack sealing can improve safety, productivity and quality, and reduce road user cost as well. The reduction in crew size and the increase in productivity of the automated sealing process will be translated directly into significant potential cost savings. The main objective of this study is to illustrate conceptual models for the development of the automated pavement crack sealer which meets domestic road condition and regulation, and to discuss its technical feasibilities. Conclusions are made concerning the applicability and the value of cantilever-typed pavement crack which is selected as the most feasible alternative in both economical and technical aspects.

• Magazine of the Korea Concrete Institute
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• v.14 no.5
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• pp.47-53
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• 2002

근래 지구촌의 산업화가 가속됨에 따라 대지의 활용도가 급속하게 증가하고 있으며 아울러 인구의 증가 및 개개인 삶의 공간적 범주가 점점 확대되면서 지구상에 광범위하게 분포되어 있는 연약지반으로의 관심이 집중되고 있는 실정이다. 최근 국내에서도 고속철도, 인천국제공항, 도심지 지하철 및 서ㆍ남해안 항만공사 등 대규모 국가건설공사가 진행 중에 있으며 더더욱 임해시설의 확충이라든지 인공섬 등의 건설이 활발해지면서 연약지반에 대한 관심이 고조되고 있다. 하지만 연약지반의 특성을 경시한 나머지 터널의 붕락, 주변지반 및 인접건물의 부등침하, 측방유동에 의한 구조물변위 등 대형 안전사고가 빈발하게 발생되어 왔다. 이러한 안전사고의 대책으로서 지반보강을 위한 여러 가지 신공법이 개발되었고, 새로운 터널보조공법이 국내 지하철건설현장에서 널리 쓰여지고 있으며 이러한 공법 등을 통한 성과도 적지 않게 보고되고 있다.(중략)

• Korean Journal of Construction Engineering and Management
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• v.21 no.4
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• pp.62-71
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• 2020

Various studies on program management have been attempted due to recent changes in the environment of the construction market, and the importance of closure phase in each phase of the construction program is increasing. However, the reality is that the related research is insufficient and the field has been managed in a rule of thumb according to individual capabilities. Therefore, in order to successfully close the construction program and enhance satisfaction of stakeholders in the closure phase of the construction program, the key stakeholders were identified using the Power and Interest Matrix. The relative importance of the closure phase process was analyzed using AHP analysis method. It was also verified through on-site surveys and interviews about the proposed importance of the closure stakeholder and the relative importance of the process. It is expected that this study will increase the satisfaction of stakeholders and contribute to a successful closure if the user puts a lot of resources into the process that has a high priority in the closure phase of the construction program proposed in this study.

• Korean Journal of Construction Engineering and Management
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• v.5 no.2 s.18
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• pp.123-135
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• 2004

Construction accident have been increasing in despite of safety management activities and education in construction site. This study surveyed safety organization, education, safety management, scheduling, safety checklist with construction firms in order to grasp the actual condition. A improved method is suggested that safety checklist is supplemented with various safety materials and then stored as database. Furthermore, safety checklists are connected and operated with schedule in ender to more efficiently prevent construction accidents.

• 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.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.587-596
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• 2015

3D scanners are applied to many industries, such as manufacturing, construction, and shipbuilding. Recently, 3D scanner is used in 3D imaging of worksite in order to control and guide earthmoving heavy equipments, which provides basic information for intelligent excavation. This study compares the accuracy and productivity between total stations and high-resolution 3D scanners. The analysis results show that 3D scanner has high accurate rate of greater than 99 percent and has low error rate of less than 2.0mm compared to total stations. In terms of productivity, 3D scanner saves 71 percent of measuring time compared to the total station. This study confirms that 3D scanner can measure the earthwork sites with high accuracy and better productivity.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.2B
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• pp.197-208
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• 2006

Case studies for real bridge sites are performed to verify the applicability of the Bridge Scour Management System in the field. The case studies for 20 bridges in Gangneung District of National Road Management consist of site investigations including the boring tests, bridge scour analyses for the design floods, bearing capacity evaluation of the bridge foundation before and after scour, and comprehensive evaluation of the bridge scour maintenance. The bridge scour management system is verified as an useful tool which can evaluate bridge scour vulnerability quantitatively, and is also proposed as a reasonable system which can help establish effective measures and secure the safety of bridges during floods.

• Journal of the Society of Disaster Information
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• v.16 no.4
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• pp.723-733
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• 2020

Purpose: This study was designed to draw up problems with the safety and health diagnosis system, and designed a hierarchical survey model of the clauses prescribed by the Occupational Safety and Health Act. The purpose of the survey is to derive the effectiveness of the safety and health diagnosis system at the construction site by targeting three groups of experts. Method: This paper set up the legal status analysis and overseas related system analysis and AHP hierarchy analysis survey model. In addition, the validity of the analysis results was verified by a survey. Results: The analysis of the survey items showed a high importance on items included in the human utilization and the precision of the pre-plan. In particular, mid-sized construction companies showed the highest importance for their active activities after the safety and health diagnosis. Conclusion: Through this study, we should recognize problems for improving the safety and health system of construction industry and prepare policy and institutional improvement measures for experts.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.679-684
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• 2023

Currently, large-scale and deep-depth excavation construction is being carried out in the vicinity of structures due to overdensity in urban areas in Korea. It is very important to secure the safety of retaining structures and underground structures for adjacent excavation work in urban areas. The safety of facilities is managed by introducing an automated measurement system. However, the utilization of the results of the automated measurement system is very low. Conventional evaluation techniques rely only on the maximum value of the measured data, and can overestimate abnormal behavior. In this study, we intend to improve the analysis technique for the automation measurement results. In order to identify abnormal behavior of facilities, a time-series analysis method for automated measurement data was presented. By applying a probability statistical analysis technique to a vast amount of data, highly reliable results were derived. In this study, the analysis method and evaluation method that can process the vast amount of data of facilities have been improved.