Test#1 Name CVEN 435 Page 1/8 Initials) 1. A consolidated-drained (CD) triasial test was conducted on...
Hg question A consolidated-drained triaxial test was conducted on saturated normally-consolidated clay sample. The effective confining stress was 200 kPa. The specimen failed at a deviatoric stress, (40), of 538 kPa. b. Determine the shear stress on the failure plane at failure. Use c = 0. Paragraph - BIE D Previous page Next page
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)
45 Ootan (15 + + 2etan(+5 + ) Gotan 45- - 2c tan 45 Subject: Geotechnics I (BFC 21702) Tutorial: CHAPTER 6 (Shear Strength) O: +00:- 2 cos 20 1. The following are the results of four drained direct shear tests on undisturbed normally consolidated clay samples having a diameter of 50 mm and height of 25 mm. Test no. 1 2 3 Normal force (N) Shear force at failure (N) 250 139 375 209 450 250 540 300 i)...
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...
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.
A standard isotropically consolidated drained triaxial compression loading test (CIDC) conducted on a normally consolidated clay specimen with a preshear consolidation stress s’c = 150 kPa resulted in a measured peak deviator stress (s1-s3)f = 205 kPa. a. Estimate c’ and f’ b. What would p’f, qf, Ds’1f and Ds’3f be if a standard isotropically consolidated drained triaxial compression unloading test was conducted on the same soil with s’c = 200 kPa? Symbols: s=sigma, f=phi, D=delta, Ds'=delta sigma prime,
A consolidated undrained (CU) triaxial compression test (TXC) was conducted on a specimen of saturated clay. The specimen was isotropically consolidated to a total cell pressure, σcell of 400 kPa. The backpressure was u0 = 100 kPa. At failure, the total pore water pressure was u = 90 kPa and the deviator stress was (σ1 − σ3)f = 526 kPa. Determine: a. The principal effective stresses, σ1′ and σ3′, at failure b. The friction angle, φ′ (secant method). c. The...
PART IV SHEAR STRENGTH OF SOILS 38 pts PROBLEM 4.1 a) A triaxial consolidated drained test is performed on a NC clay with ?.-700 kPa and uo-200. The additional axial stress applied through the piston during the shear phase is 1130 kPa. What is the angle of internal friction of the clay (assume c'-0)? Draw total and effective stress Mohr circles for pre-shear and failure conditions. Indicate position of failure plane b) A duplicate specimen is tested undrained following identical...
The state of stress within the soil below the ground surface is σ.-28 kPa, σ,-14 kPa, and t-4 kPa on the horizontal plane. Using Mohr's circle; a) Find the magnitude and directions of the major and minor principal stresses, that is the plane on which there are no shear stresses. b) If the material is a loose sand with a known friction angle of p-30 degrees and c'-0, construct the Coulomb failure envelope and determine if this soil is in...
For 1 a) c’=0 & angle = 25.6 degrees dont answer if u didnt get that. and show ur work please 1. A series of four consolidated undrained triaxial tests with pore pressure measurement gave the fol- lowing results for a saturated clay. test # confining stress σ3 (kPa) initial pore pressure uo (kPa) deviator stress at failure (σ1-03)(kPa) pore pressure at failure ur (kPa) #1 #2 #3 #4 150 300 450 600 0 202 0 305 0 410 103...