A static cone penetration test was conducted in a deposit of normally consolidated and moderately compressible dry sand. The test results were as given below: Depth (m): 1.50 3.00 4.50 6.00 7.50 9.00 Point resistance q. (MN/m³): 2.05 4.23 6.01 8.18 9.97 12.42 Assume the dry unit weight of the sand deposit = 16 kN/m³. Estimate its average peak friction angle Ø' and relative density D,.

A static cone penetration test was conducted in a deposit of normally consolidated and moderately compressible dry sand. The test results were as given below: Depth (m): 1.50 3.00 4.50 6.00 7.50 9.00 Point resistance q. (MN/m³): 2.05 4.23 6.01 8.18 9.97 12.42 Assume the dry unit weight of the sand deposit = 16 kN/m³. Estimate its average peak friction angle Ø' and relative density D,.

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.19P

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In a deposit of normally consolidated dry sand a cone penetration test was conducted. Following are the result: Depth(m) Point resistance of cone, qc (MN/m²) 1.5 2.06 3.0 4.23 4.5 6.01 6.0 8.18 7.5 9.97 9.0 12.42 Assuming the dry unit weight of sand to be 16kN/m³, estimale the average peak friction angle, ф’, fo the sand. Use ф’=tan ¯1((0.38+0.27log(qc/ σ’o))