A Plate load test is carried out on submerged soil using a 300 mm radius rigid plate. A load of 5 Tons resulted in a deflection of 1.20mm. What is the elastic modulus of the soil by considering the Poisson's ratio as 0.50?
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- Can TRIAXIAL TESTS be performed on sand samples? Briefly explain. The results of an undrained triaxial test on a clay soil sample are given in table below Cell Pressure (kN/m2) 200 400 600 Additional Axial Load at Failure (N) 342 388 465 Each sample, originally 76mm long and 38mm in diameter, experienced a vertical deformation of 5.1mm. Evaluate the stress at failure for each cell pressure given in table above. Draw Mohr Circles and determine the shear strength parameters of the soil.Two undrained triaxial tests were conducted on soil specimen, and they gave the following results: Sample Confining Pressure Deviator Stress A 350 kN/m² B 500 kN/m² 150 kN/m² 300 kN/m² The shear strength of sample A in the plane of it's normal stress is A 588 kPa B 283 kPa C 730 kPa D 165 kPa Correct OptionA direct shear test was conducted on a dried sand sample in a test box of 60mm x 60mm normal load of 400N. The soil sample failed at an applied shear force of 250N. a. Determine the shear strength parameters of the soil. b. Estimate the required shear force to cause a shear failure under a normal load of 600N. (Show all working calculations.)
- A direct shear test was carricd out on a cohesive soil sample and the following results were obtained. Normal stress (kN/m*) Shear stress at failure (kN/m) What would be the deviator stress at failure if a Triaxial test is carried out on the same soil with cell pressure of 150 (kN/m). 150 250 110 120A series of three direct shear tests have been conducted on a certain saturated soil. Each test was performed on a 2.375-inch diameter, 1.0 inch tall sample. The test had been performed slowly enough to produce drained conditions. The results of the tests are as follows: Determine the friction angle and cohesion intercept. Test No. Normal Stress (psf) Shear Stress (psf) 2435 1656 2 4870 3571 3 7305 45783 A sample of soil was subjected to a series of triaxial tests. The results were as shown in the table. If a third test is made with a cell pressure of 250 kPa. Determine the value of the maximum principal stress (in kPa) for the third test. 03 (kPa) 60 130 0₁ (kPa) 165 280 The value must be a number
- A dry cohesionless soil is tested in a triaxial test to determine the angle of internal friction f. A confining pressure equal to 1,000 psf is used. The sample fails when the axial load causes a stress of 3,200 psf. What is the value of f?4 A series of undrained shear box tests (area of box = 270 mm2) were carried out on loose soil with the following results as shown in table. If a 28 mm diam. x 72 mm long sample of the same soil was tested in a tri-axial machine, with a cell pressure of 280 kPa. Determine the value of the cohesion (in kPa). Normal load (N) Shear load (N) 90 65 185 88 The value must be a numberThree specimens of clay having a small air-void content were tested in the shear box. Shear loading was started immediately after the application of the normal load and was completed in 8 minutes. The results are as follows: 241 117 3 3 Normal Stress (kN/m²) 145 Shear stress at failure (kN/m²) 103 Find the apparent cohesion of the clay. 337 131 Find the angle of shearing resistance of the clay. What value of c would be obtained from an unconfined compression test on the same soil?
- 9. A consolidated drained test was carried out on a sandy clay under a cell pressure of 250 kPa. A constant back pressure of 120 kPa applied throughout the test. The dimensions of the sample were 76 mm x 38 mm. Addional test data recorded at failure were: Load transducer force = 368 N 3 Measured change in volume = 2.42 x 10 m³ Axial deformation = 2.05 mm Determine the major principal stress, o, at failure. (455 kPa)Import your data for FREE Buy now c. An undisturbed soil sample, 110 mm in diameter and 220 mm in height, was tested in a triaxial machine. The sample sheared under an additional axial load of 3.35 kN with a vertical deformation of 21 mm. The failure plane was inclined at 50° to the horizontal and the cell pressure was 300 kN/m². Draw the Mohr circle diagram representing the above stress conditions, and from it determine: Coulomb's equation for the shear strength of the soil, in terms of total stress; the magnitude and obliquity of the resultant stress on the failure plane. ii. A further undisturbed sample of the soil was tested in a shear box under the same drainage conditions as used for the previous test. If the area of the box was 3600 mm² and the normal load was 500 N, what would you expect the failure stress to have been? Q Search IN 9 quickbooks N quickbooks in reports 9:52 an 29/04/202A sample of dry sand is tested in direct shear. Theshear box holding the sample has a circular crosssection with a diameter of 50 mm. The normal(compressive) load imposed is 200 N. The sam-ple shears when the shear force is 130 N.(a) Determine the test normal stress and shearstress at failure.(b) Determine the angle of internal frictionfor this soil.(c) What is the probable condition of the testedsample (dense, loose, etc.)?