A layer of soft clay having an initial void ratio of 2.00 is 10 m thick. Under a compressive load applied above it, the void ratio decreased by one-fourth. Evaluate the reduction in the thickness of the clay layer, in meter (m). 2.50 5.00 3.33 1.67
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- A uniform loading of 150kPa is applied at a 28 m Χ 28 m area. Please calculate the consolidation settlement of the clay layer used the middle of the clay layer to estimate the stress increment with the influence factor method). Cc = 0.4, Cs = 0.04, preconsolidation stress is 150 kPa and unit weight of water is 10 kN/m3. What is the settlement at the corner and center of the loading? What is the differential settlement between the corner and the center?A layer of soft clay having an initial void ratio of 2.00 is 10 m thick. Under a compressive load applied above it, the void ratio decreased by one-half. Evaluate the reduction on the thickness of the clay layer in meters A. 3.33B. 3.15C. 3.74D. 3.50the results of a consolidated undrained test, in which o3 = 392 kN/m?, %3D on a normally consolidated clay are given next: Axial Strain, % Ao, kN/m2 Ud, kN/m? 0.5 156 99 0.75 196 120 1 226 132 1.3 235 147 2 250 161 3 245 170 4 240 173 4.5 235 175 Draw the kf line in a p' vs q' diagram. Also draw the stress path for the test in the diagram.
- A normally consolidated clay layer 4.91 m. thick has a void ratio of 1.12. Liquid limit is equal to 35 and the average effective stress on the clay layer was 81 kPa. The average stress on it is increased to 125 kPa. as result of the construction of a foundation. If the clay layer is preconsolidated, compute the consolidation settlement in millimeters if the preconsolidation pressure is 93 KPa. Use Cs = 1/7Cc.sample of normally consolidated clay was subjected to a consolidated undrained triaxial compression st that was carried out until the specimen failed at a deviator stress of 50 kN/m?. The pore water pressure at failure was recorded to be 20 kN/m? and confining pressure of 50 kN/m² was used in the test. Determine the consolidated undrained friction angle o and drained friction angle ¢cn: CD сиA consolidated drained tri-axial test was conducted on normally consolidated clay. The results were: the confining pressure is 300 kPa and the deviators stress is 300 kPa. Compute the angle of shearing resistance. a. 16.3 b. 54.74 c. 19.47 d. 24.72
- A normally consolidated clay is consolidated under a triaxial chamber confining pressure of σ = o'₁ = 495kN/m² and '= 29° (again for normally consolidated soil assume c' = 0). Calculate the axial stress and radial stress at failure for the following cases and draw the stress path in p'-q plane a. By increasing the axial stress and reducing the radial stress such that 20%, +0% = const. b. By reducing the axial stress and increasing the radial stress such that 2σ +σ = const .The 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 is8. A sand, with c = 0 and Ø Compute the principal stress o3. 28°, is on the limit of failure. The principal stress o1 = 55 kPa.
- 1.A dry sand is known to have an angle of internal friction of 29. A triaxial test is planned, where the confining pressure will be 41 kPa. What is the maximum axial stress, in kPa, (major principal stress) that can be applied? Calculate the value to 1 decimal place. Do not provide units in your answer. 2.A clay soil is subjected to a triaxial test under unconsolidated-undrained conditions. At failure, the major and minor principal stresses are 8401 psf and 4875 psf, respectively. What is the shear strength of this soil if the confining pressure is doubled? Provide your answer in psf with no decimals.Determine shear strength of clay having value of cohesion 31 KPa Normal stress 100 KPa and angle of internal is 31 degreeAnother 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 m