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Construction lifts are key equipment used in the vertical transportation of resources in supertall building construction. Also, according to the increase of vertical lifting distance, construction lifts are becoming more important for successful projects completion. However, a limited number of construction lifts were hard to handle the lifting load during peak-time in which the construction resources are concentrated. Also, a large number of stops caused a decrease of lifting efficiency. Consequently, these problems cause an increase of lifting time of the resources and construction delay can occur. Therefore, it is necessary to apply concept of double-deck elevators to construction lift in order to decrease the lifting time of the resources. In this study, two discrete event simulation models using the CYCLONE are developed to evaluate the lifting time of workers, who are required to be located on the upper floor workplace in the morning peak-time. Also, comparative analysis of lifting efficiency between single-cage lift and double-cage lift is conducted. As a result, the proposed simulation model of double-cage lift shows a remarkable decrease of 38.0% compared with single-cage lift. This result could contribute to set the direction of development for double-cage lift. Furthermore, it is expected to support construction manager to find optimal hoisting plan with minimum lifting time in supertall building construction.

Evaluation of Lifting Efficiency of Double-Cage Construction Lift in Supertall Building Construction