| Title |
Alternative Evaluation Model for Tower Crane Operation Plan inM odular Construction - Focusing on Modular Unit Installation and Finishing works - |
| Authors |
Kim, Joo Ho ; Park, Moonseo ; Lee, Hyun-Soo ; Hyun, Hosang |
| DOI |
http://dx.doi.org/10.6106/KJCEM.2018.19.2.050 |
| Keywords |
Tower Crane Operational Efficiency ; Discrete Event Simulation ; Alternative Evaluation ; Modular Construction |
| Abstract |
Recently, modular construction method has been widely applied to projects with repetitive processes including dormitory, the residential facility, and the hotel construction due to reduced labor input and shortened construction schedule. Generally, about 40% of total on-site construction cost excluding unit installation cost, is put on exterior finishing work, and thus management of finishing work is deemed important in maintaining the targeted schedule and cost. Since limited equipment is shared so that subsequent activities are not affected while carrying out onsite installation and finishing work, lifting plan becomes more important for modular projects with greater portion of finishing work load. In this regard, tower crane operation plan may take the form of a single cycle or multiple cycles in which equipment efficiency can be affected. However, difficulties exist in evaluating alternatives to tower crane operation plans supporting unit installation and finishing work. Therefore, this study aims to evaluate the alternative of tower crane operation method according to the cyclic period setting in modular building site to determine the effect on T/C uptime and process by parameterizing lifting time for unit and exterior finishing material, lift cycle for unit and exterior finishing material and time required for finishing work. Accordingly, this study develops a simulation model that can increase the tower crane efficiency by controlling the work speed. An academic contribution of this study is to suggest a resource leveling method applying the concept of lifting cycle, and further is expected to be managerially used as a basis for an alternative evaluation of equipment plan. |