การสร้างแบบจำลองเพื่อเพิ่มผลิตภาพในการผลิต : กรณีศึกษางานผลิตสะพานรูปกล่องตัวกลาง

Abstract

The construction of motorway project between Bang Pa-in to Nakhon Ratchasima, the range of km 65+300.000 to km 70+085.000, a total distance of 4.785 kilometers using 622 segments of precast segmental box girder. The intermediate segment was the type with the largest number of 382 segments. There were 9 sub-activities in order to produce the intermediate segment. On-site data collection show that the current production time is 786 days with a productivity rate of 0.49 segment per day. The 9^th sub-activity, pouring concrete, is the most delayed step.  The purpose of this research was to determine how to increase the productivity of the intermediate segment production in the 9^th sub-activity, pouring concrete. Using simulation from EZStrobe program to find the correlation between the number of concrete trucks. production time and production cost. The simulation results showed that from 2 to 4 concrete trucks, the productivity rate increased to 0.61, 0.67 and 0.69 segment per day, respectively. And can reduce the production time by 164 216 and 232 days, respectively.  

Keywords: Segmental box bridge, Intermediate segment, Productivity, Production time, Production cost