건축물 해체공사비 영향요인 및 실적공사비 분석 연구

Abstract

The number of demolition work is rapidly increasing because the middle- and high-rised buildings constructed over the rapid industrialization and urbanization in the 1970s and 1980s have been deteriorated in social and structural aspects. The scale of the demolition industry is also expected to be expanded.

However, theoretical approaches or studies related to the demolition cost prediction are still insufficient. Most of the related studies are focused on calculating construction costs through the presentation and supplementation of the calculation standard of the building based on the standard quantity per unit. However, there is a disadvantage that the standard quantity per unit contains only the most common contents, which makes it difficult to reflect the characteristics of the demolition site. Other methods for calculating the cost of demolition work are to rely on experts having experience on similar projects or through comparative estimates of the technology holding company concerned. However, these methods have limitations in improving the accuracy and are lack of reliability.

Thus, as a basic research for reliable cost estimates, this study 1) derived important factors affecting the fluctuation of the building demolition costs and 2) performed an analysis of change in actual construction cost based on the site information. Based on literature reviews and experts’ group interview, the 14 factors affecting the demolition construction cost were extracted and the survey was conducted on the dismantling experts. The survey results indicated the importance and variation range of 14 factors on the cost of demolition work throughout the major processes of the demolition work (temporary work, structure demolition, and waste disposal) and the entire demolition work. After this, the site information of the completed demolition work was collected and comparative analysis was performed.

‘The 14 factors affecting the demolition construction cost’ derived from this study is meaningful as a basic study of the demolition cost that is insufficient at present. And it can be utilized as base data for the demolition work plan and budgeting by presenting the degree of impact and variation range of each factors on the main process and the overall process of the demolition work.