PROBLEMS 1. A front loader will operate in an aggregate crushing operation on river bottomland. T...
PROBLEMS 1. A front loader will operate in an aggregate crushing operation on river bottomland. The soil is saturated with an unconfined compressive strength averaging about 900 psf. The maximum wheel load for the loader proposed is 40 kips. Tire pressure is 70 psi. Calculate the thickness of aggregate that should be placed over the natural soil to provide a suitable working surface 2. Off-highway trucks with maximum 80-kip axle loads and 60-psi tire pressures will oper- ate on a sand fill. The single rear axle has dual tires 2 ft apart. Compare the suitability of the fill to support the trucks after it has been compacted (D, 85 percent) to that after it was placed (D, 55 percent). 3. A private farm road is to be used for hauling aggregate from a borrow pit to a construction The farmer has stipulated that the road must be restored to its 4. Compare the estimated thicknesses of gravel required to support an overloaded highway project. The road is constructed with a 4-in. asphalt stabilized aggregate surface over a clay subgrade with an unconfined compressive strength of about 3000 psf. Legal highway dump trucks will be used. original condition after construction. Is it likely that significant repairs will be required? truck (32-kip axle load) on a soft subgrade (u 750 psf) with and without a geotextile at the fabric-soil interface.
PROBLEMS 1. A front loader will operate in an aggregate crushing operation on river bottomland. The soil is saturated with an unconfined compressive strength averaging about 900 psf. The maximum wheel load for the loader proposed is 40 kips. Tire pressure is 70 psi. Calculate the thickness of aggregate that should be placed over the natural soil to provide a suitable working surface 2. Off-highway trucks with maximum 80-kip axle loads and 60-psi tire pressures will oper- ate on a sand fill. The single rear axle has dual tires 2 ft apart. Compare the suitability of the fill to support the trucks after it has been compacted (D, 85 percent) to that after it was placed (D, 55 percent). 3. A private farm road is to be used for hauling aggregate from a borrow pit to a construction The farmer has stipulated that the road must be restored to its 4. Compare the estimated thicknesses of gravel required to support an overloaded highway project. The road is constructed with a 4-in. asphalt stabilized aggregate surface over a clay subgrade with an unconfined compressive strength of about 3000 psf. Legal highway dump trucks will be used. original condition after construction. Is it likely that significant repairs will be required? truck (32-kip axle load) on a soft subgrade (u 750 psf) with and without a geotextile at the fabric-soil interface.