A mixed-integer linear programming approach for temporary haul road design in rough-grading projects

Crew Allocation System for the Masonry Industry

“…Additionally, the optimum solution obtained was confirmed (and shared) with the owner and the project superintendent who was involved in the actual allocation on site. Also note that based on computer simulated instances, the optimum solution computational time is similar to other methods published (Yi and Lu, 2016), validating the developed formulation. Hopefully, the author will find economic resources to gather information of a larger number of real-case studies to further test the model.…”

“…Multiple techniques have been used to solve scheduling and allocation problems such as integer programming (Ipsilandis, 2007;Elazouni and Gab-Allah, 2004), multiobjective optimization (Thiel, 2008;Gao et al, 2012;Koo et al, 2016), genetic algorithms (Adeli and Kumar 1995;AlBazi and Dawood, 2010;Ponz-Tienda et al, 2015), simulation-based optimization (Horn et al, 2007;Chen and Shahandashti, 2009), stochastic simulation (Maxwell et al, 1998), dynamic programming (Dück et al, 2012), ranking methods (Lin 2011), tabu search algorithms (Erdogan et al, 2010), fuzzy models (Shahhosseini and Sebt, 2011), metaheuristics (Caprara et al 1998;Yunes et al, 2005;Debels et al, 2006), goal programming (Chu, 2007), non-linear programming (Klanšek, 2015), and stochastic programming (Morton and Popova, 2004;Lu et al, 2008).…”

A Simulation-based Earthmoving Fleet Optimization Platform (SEFOP) for Truck/Excavator Selection in Rough Grading Project

“…However, once being processed to the construction stage when specific field information become available, average production rates methods may fall short in resource planning and productivity estimating as it only accounts for particular categories of equipment and work conditions. As proofed by Yi and Lu in [4], the method based on average production rates tends to underestimate crew productivity by an average of 30%, compared to detailed operation analysis method, resulting in poorly selected fleet and reduced chances to the successful earthmoving operation.…”

Quantitative Framework for Construction Safety Evaluation in Designing Temporary Haul Road Layout on Site Grading Projects

“…Due to its temporary nature, temporary haul roads are typically built with pit run, limestone or gravel with minimum thickness or even directly laid on rough ground. Generally, the temporary haul road can be simply classified as high grade vs. low grade where high grade haul road can be gravel surfaced while low grade haul road remains rough ground requiring frequent maintenance (by grader) [2].…”