Abstract:
A construction simulation model of precast wall casting and installation operations was developed in this study.
The objectives were to analyze and improve the operations by collecting the actual duration and the construction
procedures to model the operations.
A case building was a 9-storey building with approximately 10,000 sq.m. floor space with approximately 2,500 sq.m.
of precast wall area. The operations can be separated into 2 major processes: (1) wall section casting; and (2) the
installation of the precast wall sections. The construction duration of all involved tasks were collected at the site during
a period of 60 days and were applied in a simulation model. The simulation predicted that 170 precast wall sections can
be installed in one month, where 173 wall sections were actually installed. The prediction error from the simulation model
was small and considered acceptable. From a sensitivity analysis of the model to determine the most efficient resource level,
it was found that the most efficient resource level can be achieved by using 3 labors, 3 welders and 2 craftsmen for the
operations instead of using 7 labors, 4 welders, and 3 craftsmen. Moreover, the output of the operations can be increased if
4 extra formworks were added or decreased the curing period.