• Journal of the Korean Society for Railway
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• v.12 no.2
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• pp.260-266
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• 2009

The theory of risk is applied frequently in analysis of railway accidents. The aim of risk analysis is to search potential causes and contribution factors of accidents by checking the total system of construction field. This paper analyze a pattern and a cause of accident occupied in construction field, calculate risk index considering accident frequency and severity, and then provide the relative risk assessment. Based on this, this paper will provide the methodology of qualitative risk assessment guiding to reach a consistency of risk index with risk assessment.

• Korean Journal of Construction Engineering and Management
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• v.13 no.4
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• pp.100-109
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• 2012

Large road construction projects are typically partitioned into sections that are then contracted individually to contractors. Each section requires using similar heavy equipment including excavators, dump trucks and pavers, which constitute the highest cost. Normally the equipment is not shared between them, as each contractor wishes to have their equipment readily available. However, such practices result in very low utilization of these equipment. The goal of this research is to develop a programmatic resource sharing system in which contractors can share equipment depending on the changing needs of a multi-sectioned road project. This paper introduces the results of a survey performed to investigate how contractors currently manage the supply and demand of equipment and the equipment that are practical for sharing across a project. More importantly, the paper describes a set of metrics (DPR, nDPR, SDI) needed to quantify the amount of supply/demand variance occurring in each section. The metrics were used on an actual road construction project, and the results show that each section suffers from an imbalance between its monthly planned and actual utilization of equipment. The results also indicate that the sharing of the equipment can lead to potentially large savings as equipment requirements can be met within a project as to short leasing from outside vendors.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.5D
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• pp.513-522
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• 2010

Underground construction for traffic networks, complexes, and storage facilities has risen as an effective land use plan for dealing with emerging problems such as overcrowded urban cities and traffic jams. This paper performed an economic feasibility analysis of the development of the integrated field management system which provides field workers and managers with 3D-based location tracking and clear communication during underground construction works. To conduct the analysis, processes and problems of field management for underground construction were analyzed and deduction in accidents and field management costs and productivity improvement were estimated as expected benefits. Based on computed benefits and costs, an economic analysis was conducted using Benefit/Cost ratio(B/C), Net Present Value(NPV), and Internal Rate of Return(IRR) and then sensitivity analysis was performed to cope with the uncertainty of assumed variables.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.475-478
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• 2014

This paper proposed the position tracking and recognition method of workers and cars in construction field. The reason why the position of workers and cars has to be tracked is to prevent the safety accident, emergency rescue, and theft of building materials by unauthorized people and car, etc. To realize the tracking, it needs to adopt the Information Telecommunication technology to the construction field as an integrated support system. In this paper, we proposed the continuous positioning tracking algorithm for workers and moving cars using the selected wireless communication network. And we proposed the virtual gateway method to detect the entrance status of moving workers and cars. All of these proposed methods are evaluated in real construction field using the prototype of support system made by ourselves.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.925-928
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• 2007

As the field report data does not normalize, ordering organization requires different form every time and field reporters make out form as random, data and report to the ordering organization by different medium such as FAX, e-mail, paper document. Therefore, Field reporters must set and make out same information in required pattern. And ordering organization is being responsible for side works of totalizing and processing the reported data. This research suggests the electronic document unification about monthly construction progress report and construction present condition report system. In addition, it suggests electronically processing function that can handle field report business to unifying electronic documents. As using the result of this research, it will improve the work efficiency and simplify in report business.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.17-18
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• 2014

최근 모바일 기기의 보급 확산 및 관련 정보기술 발달로 건설현장에서의 모바일 서비스를 위한 사용자 요구사항이 점차 증가하고 있다. 이와 함께 공공기관에서 발주하는 도로 하천 공사를 관리하는 건설사업관리시스템 또한 모바일 서비스의 필요성이 대두 되었다. 이에 본 논문에서는 HTML5 및 jQuery를 이용한 모바일 앱을 설계하였다. 설계한 앱은 하이브라드 방식으로써 android 및 iOS 등 다른 기기와의 호환성을 유지하였다. 그리고 지도, GPS, 이미지(카메라) 및 전자서명 기능을 추가함으로써 본 시스템의 성능 향상 및 건설현장에서의 업무를 개선할 수 있다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.95-100
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• 2004

본 논문은 도로 건설 공사 프로젝트들의 전 공정에 걸쳐 수행되는 모든 작업들을 대상으로 총 프로젝트 생산성 (Total Project Productivity)을 측정하고 분석하기 위한 방법을 소개한다. 측정 방법의 주안점은 복합적으로 병행되는 작업들의 생산량을 통합하여, 프로젝트 전체에 대한 포괄적인 생산성 값들을 구하는 방법을 개발하는데 두고 있다. 이 방법을 통해 Florida Department of Transportation (FDOT)로부터 발주된 세 개의 실제 고속도로 건설 공사 프로젝트들로부터 수천 개의 총 프로젝트 생산성 데이터 값들이 얻어졌으며. 이를 바탕으로 프로젝트 생산성을 분석하기 위한 방법의 타당성 검증이 이루어졌다. 그 결과로, 프로젝트 레벨에서의 총 생산성은 건설 작업들에 관한 현장 자료를 바탕으로 측정과 분석이 이루어질 수 있음이 입증되었다.

• The Safety technology
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• no.173
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• pp.12-14
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• 2012

경기도와 수원시, 용인시 등이 '명품신도시'라는 타이틀을 내걸고 수원(매탄동, 이의동, 원천동 등)과 용인(상현동, 영덕동 등) 일대에 야심차게 조성 중인 광교신도시. 수도권 최고의 신도시를 목표로 한 만큼 이곳에선 국내의 내로라하는 건설사들이 대거 참여, 각사의 기술력을 뽐내고 있다. 사업이 마무리 돼 입주가 시작된 현장도 있지만, 아직 일대 곳곳에선 각종 공사가 한창이다. 이런 여러 현장 가운데에서도 SK건설의 '수원광교 A10블럭 아파트건설공사 7공구 현장'은 단연 돋보인다. 이곳이 주목을 받는 이유는 바로 감성안전을 필두로한 체계적인 안전시스템 때문이다. 이곳 SK건설 임직원들은 명품신도시에 걸맞은 명품 아파트를 선보이겠다는 신념으로 안전관리에 매진하고 있다. 안전으로 광교신도시의 랜드마크 아파트를 만들고 있는 이곳 현장을 찾아가 봤다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.34 no.2
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• pp.667-676
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• 2014

This study has conducted case studies in order to suggest alternatives to the historical data-based estimate system. Price fluctuation calculation methods based on historial cost indexes, standard estimate and construction cost indexes were applied to 9 road construction sites in Jeju for an analysis. As a result, in 5 construction sites (about 56% of 9 sites), the index control rate calculated based upon historical data-based estimate system was higher than that calculated based upon standard estimate and construction cost indexes. Thus the establishment of the requirements for the adjustment of contract price due to price fluctuation delays, which leads to a significant difference in price fluctuation amount. And, in an analysis of construction cost indexes, the indexes for road construction were used for calculating index control rate which ranges from 2.0 to 9.4 percent, indicating the time of construction amount and price fluctuation application has a significant influence on index control rate.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.767-771
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• 2008

From industrial field spearhead IT and new create an added value and market with fusion of traditional industry composition researches actively to be in the process of advancing. The application possibility of high-tech IT technique is coming to be high in construction industry. Currently, the user requirements that upgrade existing system to high-tech construction project information system combined construction CALS system applying in road/river business management service with high-tech IT such as ubiquitous and mobile techniques are increasing. Therefore, the objective of this study is to verify site application of RFID and mobile equipment for applying in high-tech field with ubiquitous and mobile techniques so that construction CALS system gets advanced increasingly.