The results of two CD tests on a sand at a confining pressure of 150 kPa...
The results of two drained triaxial tests on a saturated clay are given below: (a) Confining pressure 69 kPa, deviator stress 213 kPa (b) Confining pressure 120 kPa, deviator stress 258.7 kPa Calculate φ and c.
8. A sandy soil specimen is subjected to a Consolidated Drained (CD) triaxial test. Confining pressure of 500 kPa is applied to the cell and the sample was sheared to failure. The deviatoric stress at failure was recorded as 1400 kPa. Determine the principal stresses at failure and the angle of shearing resistance for this soil. (20 points)
Problems 39 ist four major factors that influence the internal friction angle of cohesionless soils 7-2 Define soil sensitivity and thixotropy In a direct shear test on a loose sand, a shearing stress of 36.1 kPa was recorded 7-3 while the normal stress on the failure plane was 66.4 kPa. (a) What are the shear strength parameters, c', φ'? (b) Find the major and minor principal stresses at failure. (c) Determine the shear strength at a normal stress of 110.0...
A series of drained triaxial tests were conducted on sand specimens prepared at a given porosity. The following results were obtained at failure: Cell pressure, ??3 (kPa) 100 200 400 800 Deviatoric stress, ?? (kPa) 452 908 1810 3624 Determine the drained internal friction angle ??′.
Problem 3: A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 80 kN/m2 confining pressure. The vertical deviator stress was increased slowly such that there is no built-up of pore water pressure within the specimen. The specimen failed when the addition axial stress reached 240 kN/m2. Find the friction angle of the sand. If another identical sand specimen was subjected to 150 kN/m? confining pressure, what would be the deviator stress at failure.
Please show all your work!
Problem 5 (10%) A silty sand has a consolidated undrained friction angle o, drained friction angle ?'-42° (c 0). If a conducted at a confining pressure ?3-10 stresses and the pore water pressure at failure? and a consolidated-undrained test on such a soil is cu18° 8 o kPa, what will be the major total and effective
10.21 A footing has a size of 2 X 2 m which imposes 150 kPa to
the soil profile as shown in Figure 10.27. Determine the
consolidation settlement at the middle of the clay layer.
considering 2:1 pressure distribution and consider variation of
pressure along the soil profile.
10.21 A footing has a size of 2 X 2 m which imposes 150 kPa to the soil profile as show Figure 10.27. Determine the consolidation settlement at the middle of the...
Geotechnical Engineering
4. A dry sand sample is subjected to direct shear testing at its normal (in situ) water content. Tw performed on this sand. For one of the tests, the sample shears at a stress of 100 kPa when the norma is 150 kPa. In the second test, the sample shears at a stress of 200 kPa when the normal stress is 300 Determine the cohesion and the angle of internal friction of this sand sample b
4. Shear Strength A sample of cohesive soil with undrained shear strength of 30 Kpa is beng tested in a triaxial est with a confining pressure of 15 Kpa (see the figure below). Sketch the failure envelope and Mohr's circle representing the state of stress at failure. Evaluate the following: (i) The vertical axial stress at failure. (ii) The major and minor principal stresses at failure (ii) The orientation of failure plane with respect to horizontal plane. (iv) The normal...
The figure shows an element of soil at the interface between two dry sand layers on a a-32° slope The interface is d=7 m below the ground surface and ror both sand layers the friction angle is φ=30, and Ko= 0.41 Assume that the shear stress is zero on both the vertical and horizontal planes. Va1 (dry unit weight of sand layer 1) - 19 kN/m3 Ys2 (dry unit weight of sand layer 2) 20 kN/m Dry Sand (Yai Dry...