本研究提出導入建築資訊建模(Building Information Modeling, BIM)於臺灣公共工程招標準備階段之芻議。所建議之導入方式仍依照工項拆解結構(Work Breakdown Structure, WBS)拆解工項方式以構件的幾何形狀為觀點拆解出之工程工項,再使用BIM軟體建立工程專案的3D BIM model之幾何構件並且在工程構件中嵌入工程工項編碼以決定工程工項材料之構件屬性,利用XML、Excel格式或是3D BIM model的應用程式介面(Application Programing Interface, API)建立工程專案之詳細表,輸入至公共工程經費電腦估價系統(Public Construction Cost Estimate System, PCCES),來製作出工程專案之預算書和招標準備階段需要之各式文件。 經由一「人行陸橋改善及美化工程」實際案例來進行BIM導入之實作、展示與驗證,本研究發現,使用BIM可以讓設計階段與施工階段的工程材料、尺寸和數量的估算非常接近。經由案例之差異分析亦可知,使用BIM的設計階段估價與實際施工之工程複價差距少於0.70%。所以,導入BIM技術於臺灣公共工程招標準備階段應可減少工程圖說與各式表單之工程材料、尺寸與數量差異,並可以因之降低業主與施工廠商之工程風險。此外,還可利用WBS拆解工項方式,及透過3D BIM 模型於施工前、中、後不同階段的模擬來避免工項漏失。
This study proposes an approach for implementing BIM (Building Information Modeling) into preparatory stage of tender invitation for Taiwan public construction. First of all, this approach constructs a 3D BIM model to represent the physical components of a facility to be built as many as possible. Next, the work item codes are also embedded in the components as their attributes. Finally, with the BIM model, the quantities of the components can therefore be estimated with good accuracy and exported into PCCES (Public Construction Cost Estimate System) for preparing budget and tender documents. Through a case study on a real renovated project of the pedestrian overpass, this study has found that implementing BIM between design and construction stages makes the difference of quantities very small and the difference of project price less than 0.7%. Therefore, implementing BIM into the preparatory stage of tender invitation for Taiwan public construction is ought to improve the consistency between engineering drawings and related tender documents, leading to the reduction of risk for both the owner and contractor.