Trimble Business Center

I am in the process of learning Corridor Mass Haul.  In the MSI manager, what is hauling bulkage (%) ?

It is the "Swell" of the material when cut from embankment.

Hi Robert,

Good question. Hauling bulkage is defined simply as: The percent that, or factor by which, the material will increase in bulk when it is cut and hauled in a loose condition.

Or in more depth: A measure of the increase in volume of an insitu portion of soil or rock, due to expansion and loosening occurring as a result of its excavation. Bulkage is a common result when soil is excavated from a site in its natural insitu state and placed into stockpile, or moved elsewhere during construction activities. Its measure provides a means of computing the volume of loose material to be hauled, and therefore the number of loads required at a particular load capacity. The expected haul bulkage for a given soil can be expressed as a percentage of the initial soil volume. For example, a haul bulkage factor of 8% indicates that the soil will expand to occupy a volume 8% larger than it occupied prior to excavation. This value can also be expressed as a multiplication factor. For example, a soil with a haul bulkage of 8% will have a multiplication factor of 1.08.

May I also suggest that when you see something unfamiliar in the interface, you press F1 and search for the term in the help? That may often save you some trouble. There are 14 topics in the help that mention "hauling bulkage" or "haul bulkage". Thanks.

David

The reason why we have this is if you are trying to count Truck loads needed to move the dirt and your Trucks have a finite capacity (most do ....) then the Loose Haulage Volume is an important factor (unless you intend to compact the dirt in the truck ...).

So Typically 10 CY of dirt in the Ground will become say 11.8 CY on the Truck (18% Swell) and then when placed and compacted it may be 9.5 CY (because you have taken moisture and air out of the material (A Cut to Fill shrinkage of 5%)

Most people care about the Cut To Fill Shrink / Swell Factors and don't really consider the In Truck Loose Haulage for estimating, but it can make a big difference in terms of number of truckloads required to move the dirt (and the associated Time and Cost to move the dirt.

Alan