A 14-in.-diameter steel pipe pile is driven 50 ft into overconsolidated clays having the following properties: From zero to 20 ft depth the cohesion is 1,500 psf and the soil unit weight is 110 pcf; below 20 ft, the cohesion is 2,500 psf and the soil unit weight is 120 pcf. Using the α-method, calculate the downward and upward axial capacity of the pile, applying a factor of safety of 3 (downward and upward).

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Pricing Excavation and Backfill

Backfill, in construction, is the activity of returning the soil and gravel that are removed during building construction or using them again to toughen and support the foundation of the building or any other structural component.