Proceedings of the Korean Institute Of Construction Engineering and Management (한국건설관리학회:학술대회논문집)
- 2008.11a
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- Pages.197-201
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- 2008
Development of an Activity-Based Conceptual Cost Estimating Model for P.S.CBox Girder Bridge
대표공종 기반의 P.S.C 박스 거더교 개략공사비 산정모델 개발 -상부공사 중심으로-
- Published : 2008.11.07
Abstract
Conceptual cost estimates for domestic highway projects have generally been conducted using governmental unit-price references. Inaccuracies in governmental unit-price data has repeatedly addressed in the Korean construction industry which often lead to poor decision making and cost management practices. Thus, needs for developing a better way of conceptual cost estimating has been widely recognized. This research is considered as the first step in developing such model using real-world cost data based on actual construction activities. The data analyzed in this paper includes 41 P.S.C (Prestressed Concrete) Box bridges which broke into 4 categories based on construction methods such as I.L.M(Incremental Launching Method), M.S.S(Movable Scaffolding System), F.S.M(Full Staging Method), and F.C.M(Free Cantilever Method). Actual design documents; including actual cost estimating documents, drawings and specifications were carefully reviewed to effectively break down cost structures for PSC girder bridges. Among more than 40 cost categories for each P.S.C girder bridge type, 7 of them were identified which accounted for more than 95% of total construction cost (ILM: 99.47%, MSS: 99.22%, FSM: 98.18%, and FCM: 98.12%). In order to validate the clustering of cost categories, the variation of each cost category has been investigated which resulted in between -1.16 % and 0.59%.
국내 도로건설사업은 평균 단가 기준으로 개략공사비를 산정한다. 도로의 기초자료를 갱신함으로써 평균 단가를 수정하고 있으나 공사 특성을 전부 반영하기에는 미흡한 실정이다. 설계 진행단계에서 설계 대안을 평가하는데 활용할 수 있는 공사비 예측모델의 필요성이 제기되는 가운데 대표공정을 통해 표준물량을 산출하고 개략공사비 산정모델개발을 통해 실질적인 공사비 예측이 가능한 모델을 개발하고자 한다. 본 연구에서는 Prestressed Concrete Box Girder Bridge의 상부공사를 중심으로 연구를 수행하며
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