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- 5 The compression curve (void ratio, e vs. effective stress, o) for a certain clayey soil is a straight line in a semi-logarithmic plot and it passes through the points (e = 1.2; o = 50 kPa) and (e=0.6; o = 800 kPa). The compression index (up to two decimal places) of the soil is 100The compression curve (void ratio, e vs. effective stress, o) for a certain clayey soil is a straight line in a semi-logarithmic plot and it passes through the points (e = 1.2; o = 50 kPa) and (e = 0.6; o = 800 kPa). The compression index (up to two decimal places) of the soil isThe compression curve (void ratio, e for a certain vs. effective stress, clayey soil is a straight line in a semi-logarithmic plot and it passes (e = 1.2; = 50kPa) through the points (e = 1.2; 0) V and (e=0.6;=800kPa). The compression index (up to two decimal places) of the soil is
- What is the equivalent coefficient of permeability (k) for soil layers of k2 and k3? where k2= 1.75 k1 and k3 = 3.3 k1 10 8 IB K2 N K3 N K1 K4 .a k1 25.250 .b k1 12.625 .C k1 5.050 .d k1 2.525 28 12 4.11. What will be the shearing resistance of a sample of clay in an unconfined compression test, falls under a load of 150 N? Take change of cross-section Af=2181.7 mm².What is the equivalent coefficient of permeability (k) for soil layers of k2 and k3? where k2= 1.75 k1 and k3 = 3.3 k1 10 8 B C K2 ~ K3 N K1 K4 .a k1 25.250 .b k1 12.625 .C k1 5.050 .d k1 2.525 28 co
- 1. Triaxial compression tests are done on quartzite rocks, the results are shown below. (0₁+03)/2 -964.25 14500 19575 23200 29000 43210 63075 psi (01-03)/2 964.25 14500 18850 21750 26100 35960 48575 psi Comment on the applicability of each of the Mohr-Coulomb, Griffith, and Hoek-Brown criteria for the testing results.Under the setup of an Unconfined Compression test, what is the ratio between the maximum compression stress obtained from a stress-strain curve versus the maximum shear stress obtained from a Mohr's circle? O it depends on the soil type 1/3 0.5 O 1The results obtained from unconsolidated undrained (UU) triaxial compression tests are given in table below. You are asked to determine the undrained shear strength properties of the clay by drawing Mohr circles on the graph sheet given below. You must label all axes. Sample σ3 σ1-σ3 1 50 200 2 100 200 3 200 200
- Another method of determining the capillary rise in a soil is to use Hazen's capillary formula. The 3 m thick dense silt layer shown below is the top stratum of a construction site, has an effective diameter of 0.01 mm. What is the approximate height of the capillary rise in that silt stratum? What are the vertical effective stresses at depths of 3 m and 8 m below the surface? The "free ground water" level is 8 meters below the ground surface, the y's=26.5 kN/m³, and the soil between the ground surface and the capillary level is partially saturated to 50%. Dense silt Clay h₁ = 3 m h₂=5 mAnd the void ratio for each load increment is shown in the table below. σ₂ (kPa) Void ratio 15 1.66 30 1.65 60 1.64 120 1.52 2- Find Preconsolidation pressure (oc) and compression index (Cc). 240 1.38 480 1.25The soil in a deposit underlying an area where a level ground surface exists has a unit weight of 22 kN/m3. Determine the principal stresses o1 and oz at a depth of 5 m below the soil surface if the lateral pressure is 0.50 of the vertical pressure. Adjust your answer to ZERO decimal places. 01 = kN/m2, 03 = kN/m2