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A series of three direct shear tests were conducted on saturated sandy soil sample at 3 normal stresses of 50, 100, and 200 kPa. The test results are shown below. (a) Using the data, determine the effective cohesion and angle of internal friction based on shear stress v. normal stress plot. (b) What type of behavior is demonstrated by the soil (NC/OC)? (c) Based on the answer, classify whether the sand is dense or loose.

A series of three direct shear tests were conducted on saturated sandy soil sample at 3 normal stresses of 50, 100, and 200 kPa. The test results are shown below. (a) Using the data, determine the effective cohesion and angle of internal friction based on shear stress v. normal stress plot. (b) What type of behavior is demonstrated by the soil (NC/OC)? (c) Based on the answer, classify whether the sand is dense or loose.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Please use graph paper

A series of three direct shear tests were conducted on saturated sandy soil sample at 3 normal stresses of 50, 100, and 200 kPa. The test results are shown below. (a) Using the data, determine the effective cohesion and angle of internal friction based on shear stress v. normal stress plot. (b) What type of behavior is demonstrated by the soil (NC/OC)? (c) Based on the answer, classify whether the sand is dense or loose. You are free to use graph paper to plot the data. K 1145 73 Normal stress = 03 = 200 kPa 38 Normal stress = 02 = 100 kPa Normal stress = o, = 50 kPa 01, O2, 03 are not principal stresses. These are different vertical stresses. TF31 10 mm Shear displacement (mm) NTS (Not to scale) Shear stress, t (kPa)
Transcribed Image Text:A series of three direct shear tests were conducted on saturated sandy soil sample at 3 normal stresses of 50, 100, and 200 kPa. The test results are shown below. (a) Using the data, determine the effective cohesion and angle of internal friction based on shear stress v. normal stress plot. (b) What type of behavior is demonstrated by the soil (NC/OC)? (c) Based on the answer, classify whether the sand is dense or loose. You are free to use graph paper to plot the data. K 1145 73 Normal stress = 03 = 200 kPa 38 Normal stress = 02 = 100 kPa Normal stress = o, = 50 kPa 01, O2, 03 are not principal stresses. These are different vertical stresses. TF31 10 mm Shear displacement (mm) NTS (Not to scale) Shear stress, t (kPa)
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