การวิเคราะห์ทางเลือกการก่อสร้างถนนระดับดินแบบชิ้นส่วนสำเร็จด้วยวิธี ELECTRE II

Abstract

Constructing an at-grade road by the cast-in-place method requires that each activity must be completed before the next can begin. However, using a precast concrete pavement system (PCPs) and installing precast parts onto road sub-base layers can reduce project duration and improve pavement quality compared to concrete cast-in-place pavement. To determine the overall differences in project results, a comparison must be made under the same conditions, both in terms of time, cost, and quality of both construction methods under the condition of many factors simultaneously. This research aims to analyze the advantages and disadvantages of both construction methods to provide a guideline for future road-building decisions under different environmental conditions and limitations by using ELECTRE II. The principles of road and traffic engineering and project management are considered in the study. The results show that PCPs can be used as an alternative to stationary casting, with the option of using integrated concrete casting with cast-in-place arch installation, producing precast concrete only in a straight line, and utilizing several construction periods concurrently. If implemented, this method can reduce project duration and improve construction quality. However, expert opinions suggest that the cost-effectiveness of precast concrete for a single project may still be difficult to determine due to the high initial investment in production and installation, the importance of knowledge and expertise for operators, and the need for investment and management in training and personnel allocation for precast concrete production. Indirect factors, such as training and personnel allocation for precast concrete production, must also be considered.