Following is the variation of the field standard penetration number (N60) in a sand deposit: Depth (m) N60 1.5 6 3 8 4.5 9 6 8 7.5 13 14 9 The groundwater table is located at a depth of 6 m. Given: the dry unit weight of sand from 0 to a depth of 6 m is 16 kN/m³, and the saturated unit weight of sand for depth 6 to 12 m is 22.2 kN/m³. Estimate an average peak soil friction angle. Use the equation 0.5 1 CN = (σo/Pa) (Enter your answer to three significant figures.) = о

A cone penetration test result of a deposit of normally consolidated dry sand are given below. Estimate the drained friction angle of the sand using Kulhawy and Mayne's equation. The unit weight of the sand is 100 pcf. Depth ft 5.0 10.0 15.0 20.0 25.0 30.0 45 38 42 40 Tip resistance of cone, qc psi 300 600 800 1200 1400 1800

Sand cone equipment is used to perform a field density on compacted earth fill. Sand is used in the cone and is known to have a bulk density of 15 kN/m3. The wet weight of soil sample from the test hole is 20.601 N. The dry weight of soil sample is 17.926 N. The weight of the sand in the sand cone to fill the test hole is 16.053 N. Determine the in-place dry density in kN/m3 of the tested soil.