• 제목/요약/키워드: Road Construction Project

검색결과 272건 처리시간 0.024초

비목별 주요 항목을 활용한 도로 공사비지수 산정에 관한 연구 (The Research on Development of Road Cost Index Using Each Representative Item of Expenditure)

  • 천진용;우성권
    • 대한토목학회논문집
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    • 제26권1D호
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    • pp.105-113
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    • 2006
  • 건설공사비지수는 과거의 공사데이터를 바탕으로 신규공사의 공사비를 추정할 수 있을 뿐 아니라, 공사 수행 중 원가를 구성하는 비목의 가격이 상승 또는 하락할 경우 계약금액을 조정하는데도 활용된다. 국내의 경우 건설공사비지수는 주로 계약금액 조정을 위해 활용되고 있지만 계약금액 조정에 활용되는 지수의 경우 비목별 지수 산정시 건설원가의 변동을 적절하게 반영하지 못하는 문제점이 지적되어 왔다. 본 연구에서는 기존의 공사비지수 산정에 관한 선행 연구들을 비교 분석하고, 도로 건설공사 내역서의 분석을 통해 노무, 재료, 기계경비를 구성하는 주요 항목들을 중심으로 도로 건설공사비지수를 산정하는 방법론을 제안한다. 본 연구에서 제안하는 각 비목별 주요 항목의 투입 구성비를 활용한 지수산정 방법론의 적용을 통해서 건설원가의 변동을 적절히 반영하지 못한다는 기존의 문제점이 보완될 수 있을 것으로 기대된다.

Leveraging Reinforcement Learning for Generating Construction Workers' Moving Path: Opportunities and Challenges

  • Kim, Minguk;Kim, Tae Wan
    • 국제학술발표논문집
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    • The 9th International Conference on Construction Engineering and Project Management
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    • pp.1085-1092
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    • 2022
  • Travel distance is a parameter mainly used in the objective function of Construction Site Layout Planning (CSLP) automation models. To obtain travel distance, common approaches, such as linear distance, shortest-distance algorithm, visibility graph, and access road path, concentrate only on identifying the shortest path. However, humans do not necessarily follow one shortest path but can choose a safer and more comfortable path according to their situation within a reasonable range. Thus, paths generated by these approaches may be different from the actual paths of the workers, which may cause a decrease in the reliability of the optimized construction site layout. To solve this problem, this paper adopts reinforcement learning (RL) inspired by various concepts of cognitive science and behavioral psychology to generate a realistic path that mimics the decision-making and behavioral processes of wayfinding of workers on the construction site. To do so, in this paper, the collection of human wayfinding tendencies and the characteristics of the walking environment of construction sites are investigated and the importance of taking these into account in simulating the actual path of workers is emphasized. Furthermore, a simulation developed by mapping the identified tendencies to the reward design shows that the RL agent behaves like a real construction worker. Based on the research findings, some opportunities and challenges were proposed. This study contributes to simulating the potential path of workers based on deep RL, which can be utilized to calculate the travel distance of CSLP automation models, contributing to providing more reliable solutions.

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친환경 토질개량제를 이용한 도로노반 건설공사에 관한 연구 (Construction of roadbed with environmental friendly soil amendment agent)

  • 고용국
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2003년도 봄 학술발표회 논문집
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    • pp.417-421
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    • 2003
  • The purpose of this paper is to study on the construction of roadbed with environmental friendly soil amendment agent. The special amendment agent used in this study is mainly composed of inorganic metal salts such as sodium chloride, magnesium chloride, potassium chloride, calcium chloride,, thus is friendly to the environment, and has a function of soil-cement-agent solidification. Various components of this agent weaken the negative function of humic acid and decompose humic acid itself. Then, the calcium cation of the cement can now be made contact directly to the soil surface. The project of local road demonstration of roadbed construction with special soil treatment agent was peformed in Northeast Thailand on August 1999 by the sponsor of Highway Department of Thailand. A series of field experiments including unconfined compressive strength were carried out to investigate the physical and mechanical characteristics of solidified roadbed treated by this solidifying agent. The results of this research showed that the roadbed using poor soil could be efficiently constructed by treatment of this amendment agent.

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합성고무 폴리머 겔과 구리 방근시트를 이용한 P.C 쌍아치 터널 구조물 방수기술 (Waterproofing technology for PC double arch tunnel using synthetic rubber polymer gel and cooper sheet for root barrier)

  • 이종용;박상태;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2020년도 가을 학술논문 발표대회
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    • pp.44-45
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    • 2020
  • The purpose of this study was to contemplate the effectual waterproofing materials and construction methods for the restoration of underground infrastructures using precast arches(PC-Arch). Until now, there were no proper waterproofing guidelines for waterproofing precast arch tunnel when restoring cultural heritage or building underground infrastructures for noise control. Asphalt membrane sheets were commonly used, but the efficacy of waterproofing done on the precast segment was vulnerable. This study aims to examine the Synthetic Rubber Polymerised Gel(SRPG) proposed in ISO TR 16475, a guideline for the repair of water-leakages, and to demonstrate field applicability based on the waterproofing solution used on the road improvement project in front of Changgyeonggung Palace in Yulgok-ro, Seoul, Republic of Korea.

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민간투자사업을 활용한 사립대 기숙사의 문제점 및 개선방안 (Problems and Solutions of private university dormitory project with PFI)

  • 김종수;송낙현;이찬식
    • 한국건설관리학회:학술대회논문집
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    • 한국건설관리학회 2008년도 정기학술발표대회 논문집
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    • pp.471-474
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    • 2008
  • 2005년 민간투자법이 개정되면서 기존의 도로, 항만분야에서 교육시설, 군 주거시설까지 사업 범위가 넓어지면서 많은 민간사업이 수행 되었다. 특히 대학시설 중에서는 수익률 확보에 가장 유리한 기숙사 사업이 많이 수행되었지만, 문제점도 발생하게 되었다. 본 연구의 목적은 민간투자 사업을 대학교 기숙사 사업에 도입함으로써 발생되는 문제점을 전문가의 면담을 통해서 도출하고 그에 따른 개선방안을 제시하는 것이다. 면담 결과 민간사업자의 참여로 인한 입실료의 상승과 각 참여자의 입장 차이 및 교육시설의 특성상 발생되는 수익률 상환의 어려움 그리고 비영리 교육시설이라는 인식 부족에서 발생하는 정부의 지원 부족등의 문제점이 나타났으며 그에 대한 개선방안으로 재단의 활용, 다양한 프로그램의 도입, 조세 완화를 제시하였다.

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도로비탈면 녹화공사의 사후환경평가 항목 제언 (Suggestion of the Post-Environmental Evaluation of Road-side Cut Slope after Revegetation Works)

  • 김태국;김남춘;김은범;구민규
    • 한국환경복원기술학회지
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    • 제21권4호
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    • pp.75-86
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    • 2018
  • This research was thereby made to study and analysis ecological, landscape, and stability qualities of roadside cut Slopes in expressways and national highways that went through revegetation works. Also, evaluation items and framework for integrated assessment of plant structure and restored state for the maintenance were suggested. Following is the summary of the result. firstly, for stabilization of introduced native plant species on roadside cut slops, assessment on the post-project environmental management through long-term monitoring and maintenance works must be made. It signifies a form of authentic recovery and restoration by the native plants. second, current evaluation framework on the test beds is well managed with clear evaluation standards and table while its method of assessing the post management with only test bed results lacks conformity with this study site. Newly developed evaluation framework on the post construction sites is estimated to be used as assessment standards on any roadside construction sites. Third, after site investigation distinction was observed among different revegetating construction types in the long-term perspective. Due to the different duration time of vegetation state between seed-spray measures(degraded in time) and layer-spray measure(maintained), the use of coarse straw-mat mulching work or Coir net was suggested in long term maintenance of cut slopes. forth, segmentation of post environmental assessment is organized into three large categories of "ecological", "stabile", and "landscape" qualities regarding post restoration quality and stability of slope through native plants with which categories marks 50, 30, 20 points of rates. fifth, components of the post environmental assessment were segmented in twelve categories driving results from former experimental construction and newly focused items on site. In the future, it is possible to propose a customized assessment method considering the location and location of construction work if the research on the application of post-environment assessment methods for road construction surface recording is conducted systematically.

Prediction of duration and construction cost of road tunnels using Gaussian process regression

  • Mahmoodzadeh, Arsalan;Mohammadi, Mokhtar;Abdulhamid, Sazan Nariman;Ibrahim, Hawkar Hashim;Ali, Hunar Farid Hama;Nejati, Hamid Reza;Rashidi, Shima
    • Geomechanics and Engineering
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    • 제28권1호
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    • pp.65-75
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    • 2022
  • Time and cost of construction are key factors in decision-making during a tunnel project's planning and design phase. Estimations of time and cost of tunnel construction projects are subject to significant uncertainties caused by uncertain geotechnical and geological conditions. The Gaussian Process Regression (GPR) technique for predicting ground condition and construction time and cost of mountain tunnel projects is used in this work. The GPR model is trained with data from past mountain tunnel projects. The model is applied to a case study in which the predicted time and cost of tunnel construction using the GPR model are compared with the actual construction time and cost for model validation and reducing the uncertainty for the future projects. In addition, the results obtained from the GPR have been compared with to other models of artificial neural network (ANN) and support vector regression (SVR) that the GPR model provides more accurate results.

터키 유라시아 터널 프로젝트에 대한 사례연구 (A Case Study on Turkey Eurasia Tunnel Project)

  • 김도형;방규민;전기찬;김동현;김택곤
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2010년도 춘계 학술발표회
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    • pp.58-69
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    • 2010
  • Turkey Eurasia Tunnel Project is large scale road construction project of which the total length is 14.6km. The subsea shield TBM tunnel will be constructed under Bosphorus strait and the project site is in poor condition as composite ground, high water pressure and earthquake. The design procedure of subsea tunnel was introduced with tender design materials. That procedure contains tunnel type, TBM type and the principal design items considering geological condition such as high water pressure, composite ground and seismic area. This paper states the progress for geotechnical investigation, seismic analysis and TBM tunnel design. Analysis for geotechnical investigation is in progress, aseismatic design is going on stability study for liquefaction and structure. In addition, the performance of shield TBM to be considered such as advance rate and improvement of TBM was reviewed. The plan of fire safety was also reviewed with respect to fire protection.

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토목분야 BIM 적용을 위한 로드맵 제안 및 정보모델표준 개발 기초연구 (Proposal of Roadmap and Basic Research of Information Model Standards for Application on the BIM on Civil Engineering)

  • 김진욱;문진석;주기범
    • 한국산학기술학회논문지
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    • 제13권12호
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    • pp.6176-6186
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    • 2012
  • 건축분야에서는 IFC 표준과 BIM 적용에 대한 다수의 연구 및 적용 사례가 있으나 토목분야는 미흡한 실정이다. 또한, 최근 공공 발주기관에서 토목사업에 BIM 도입을 계획하고 있으나 국가차원에서 BIM 표준 및 납품체계가 마련되지 않아 이에 대한 요구가 증가하고 있다. 이에 토목분야에 대한 BIM과 IFC 국제표준의 현황을 분석하고 토목분야의 표준과 납품체계 구축을 위해 토목분야 BIM 개발을 위한 로드맵을 수립한다. 또한 토목분야에 대한 BIM의 단계적 개발 및 적용을 위하여 도로건설분야에 대한 BIM 도입 연구를 우선 수행하고, 현행 도로건설공사를 대상으로 건설정보 분류체계를 확장 적용한 BIM 정보모델을 작성하고 분석한다.

대구순환고속도로 제5공구 BIM 시범설계의 신뢰성분석 및 제언 (Analysis of Reliability and Suggestion on BIM design at Daegu Expressway Lot No.5)

  • 설운호;배병훈;박종서;신재철;이근일
    • 한국BIM학회 논문집
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    • 제4권4호
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    • pp.1-12
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    • 2014
  • As interest for visualization and real time processing of construction management information was heightened recently, a diversity of management tools have been developed and corresponding systems also have been changed. In the case of BIM(Building Information Modeling) which is being spotlighted as such kind of management tool, its outcome such as technical innovation and time saving through overseas success case, reducing effect of unnecessary work, and so forth has continuously been established. The BIM in which various information related with life cycle of project are managed with the base of 3D object is useful as an information management tool of construction project which becomes complex and large in its scale. The aim of this paper is analysis or reliability on BIM design for expressway. To solve these issues, this study analyzes the design document, road design handbook, guide. Also this paper performed analysis of reliability 2D vs. BIM quantity calculation. This pilot projects "BIM design at Daegu expressway Lot No.5" lays the foundation for future work on BIM based civil engineering design.