Akademik Veri Yönetim Sistemi
Journal of Construction Engineering, Management & Innovation (Online), cilt.4, sa.3, ss.173-186, 2021 (Hakemli Dergi)
In this study, a decision support system is developed to aid selection of earthwork equipment. Physical and
economical attributes of five off the shelf dozers, three excavators, and seven hydraulic hammers are entered
to a spreadsheet application. Seven seismic velocity-mechanical property relationships of rock and stiff soil
are derived from the literature and defined to the spreadsheet application. Mechanical properties of the soil
samples obtained from the construction site are entered to the relevant data cells and seismic velocity to be
measured at the field is estimated. Developed system estimates the ripper outputs of the dozers by using
ripper production charts, cost and duration of the earthwork task is computed and likelihoods of the feasibility
of the construction machines are estimated. Developed system takes the construction duration into account
and solves time-cost trade-off problem for the selection of the best construction machine. Developed
methodology is implemented on the excavation of the foundations of a mass public housing project with 72
houses. Utilization of ripper production charts without performing seismic velocity tests become possible by
the proposed method. Furthermore, time cost trade-off problem is formed and solved without human
interruption. The developed decision support system proposes the construction machine with least total direct
and indirect costs. Contractors would be able to reduce their construction costs and gain competitive
advantage on their rivals, if they implement the proposed system.