Cubic Metres Excavated - Compaction Factor of the Material - Business Assignment Help

Assignment Task :

A site manager reports progress on an excavation project. A total of 120 cubic metres of material (bank measure) needs to be excavated. 20 cubic metres of space will then have to be backfilled again. When you talk to the site manager and ask for a progress report, the site manager explains: ?Well, the total that we need to excavate is 120 cubic metres. But because we will need to backfill a space of 20 cubic metres, we only have to get 100 cubic metres excavated and removed off the site. So far, we have driven 10 trucks full of material off the site. Each truck has a volumetric capacity of 4.5 cubic metres.

That means we have 45 of the 100 cubic metres excavated and removed from the site. So, we're 45% complete with our excavate and remove' activity.?

You ask: Are you sure Did you consider the swelling and shrinkage of your material?? The site manager just looks at you and asks: ?What are you talking about?? To help the site manager determine the actual progress achieved you first search for the soil report and find the following information: Swelling factor of the material is 25% (relative to bank measure).

• Compaction factor of the material is 40% (relative to bank measure). The undisturbed material weighs 1600kg/m3. How many cubic metres of material really have to be moved off the site, if 20 cubic metres will have to be backfilled and compacted again?
• What is the actual progress percentage that the site manager should have reported for the ?excavate and remove? activity?
• How many cubic metres of loose material would fit into a truck if it started to rain and the material became wet, leading to a weight factor 2000kg/m3 for the undisturbed material? The weight capacity of the truck is 7000kg.  

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