1. 5 direct shear test was performed on a drained soil sample of 45mm(L)x XYmm(W)x 20mm(D). The test result is provided

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1 5 Direct Shear Test Was Performed On A Drained Soil Sample Of 45mm L X Xymm W X 20mm D The Test Result Is Provided 1 (66.55 KiB) Viewed 12 times

1. 5 direct shear test was performed on a drained soil sample of 45mm(L)x XYmm(W)x 20mm(D). The test result is provided below, Test no Normal Force (N) Shear Force (N) 1 77 140 2 120.5 171 3 144 188 4 281 287 5 416 385 a) Plot the graph using Coulomb's failure criteria. b) Find out the cohesion parameter in kPa and friction angle for the soil. c) Comment on the type of the soil (50) In the data set provided in previous problem consider the soil was drained and had a pore water pressure of 29.43kPa. • Plot the graph using Coulomb's failure criteria. • Find out the effective cohesion parameter in kPa and effective friction angle for the soil. Did you see any change with problem 1? Please make comment. (Note and hint: pore water pressure only acts vertically, thus there won't be any effect on the horizontal direction or in other words for shear.) (50) XY is equal to 17