A new design method developed at Concordia University aims to protect budgets and deadlines on megaprojects.
The method uses stochastic simulation, a modelling approach that predicts randomness, to identify scheduling clashes and create sequences for bridge demolition and construction.
The 4D approach has been applied to Montreal’s Turcot Interchange scheme, a CA$3bn (£1.6bn) project to rebuild four motorway interchanges. Traffic has to keep moving during the project, which means 280,000 vehicles a day travel through the area. Vehicles have been shifted from existing road segments to newly completed areas.
“This parallel coordination of construction and demolition activities with traffic flow is essential to the success of these projects,” said Amin Hammad, a professor at Concordia’s Institute for Information and the study’s senior author.
“That’s why our new modelling method uses a 4D approach – taking into account the three normal space axes, plus time, to coordinate the traffic phasing with the demolition and construction of the old and new segments, respectively,” he added.
“This study allows decision makers to better schedule construction and demolition activities to avoid any conflicts that may delay the project and increase the cost.”
The Turcot Interchange is expected to be completed in 2020.