Haul road design based on vertical strain
Larger haul trucks are being used at surface mines in Canada thus requiring better haul roads to carry heavier loads. Haul road design is often based on past experience without sound engineering design. This can lead to under design resulting in costly road repairs, productivity losses, and increased truck maintenance costs.
A review of various road design methods showed that a method based on the resilient modulus of the construction materials combined with a critical vertical strain criterion provides a good design for haul roads. This method is more appropriate than the CBR design method, especially for roads design to carry large haul trucks.
The design method is illustrated with worked examples and is compared to current designs.
Trucks, strain limit, haul roads, modulus, rolling resistance