กรณีศึกษาการปรับปรุงกระบวนการผลิตและติดตั้งผนังคอนกรีตหล่อสำเร็จสำหรับอาคารสูงโดยการจำลองสถานการณ์ด้วยวิธีเพทริเน็ทส์

Abstract

This paper presents a case study of a construction process improvement by means of a simulation method which is a way that can be used for determining the appropriate working period and number of resources. This research has studied the process of production and installation of pre-cast concrete walls for two high-rise buildings, and a model for such process was developed by means of the Petri Nets method. Then, the simulation was performed in order to determine the appropriate working period and number of resources, and the results obtained were taken into account to improve the actual process of construction at site. Such appropriateness is considerably based on the least costs of construction under the condition that the time to be spent in processing the projects must be still within the contractual timeframe. According to the research results, it found that a high-rise building, 34 to 35-stories, with 7,000 to 8,000 square meters of wall areas or with approximately 320 square meters of wall areas per storey, which selected the production and installation by means of a pre-cast concrete walls system, can use twenty three sets of eight square meters-sized cast molds, with five craftsmen, three male labourers and two female labourers. The costs of production and installation of pre-cast concrete walls are approximate 1,200 baht per square meter and the total time spent is twelve days per storey.