A sample of sand is tested in a direct shear device to determine its angle of internal friction. Cross-sec- tion dimensions of the shear box are 2.0" by 2.0". The sample is tested at a vertical normal force N of 40 Ib and resulted in a maximum horizontal shear force T of 30 lb. (a) Assuming the sand is cohesionless, what is the angle of internal friction o of this sand? (b) If a second test is conducted at a vertical normal force of 65 lb, what would be the anticipated maxi- mum horizontal shear force T?

A sample of sand is tested in a direct shear device to determine its angle of internal friction. Cross-sec- tion dimensions of the shear box are 2.0" by 2.0". The sample is tested at a vertical normal force N of 40 Ib and resulted in a maximum horizontal shear force T of 30 lb. (a) Assuming the sand is cohesionless, what is the angle of internal friction o of this sand? (b) If a second test is conducted at a vertical normal force of 65 lb, what would be the anticipated maxi- mum horizontal shear force T?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Subsurface Exploration

Section: Chapter Questions

Problem 12.11P

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