1 Problem 4 CU tests carried out on two samples of clay. Each sample was isotropically...
A CU triaxial test was carried out on a silty clay that was isotropically consolidated using a cell pressure of 125 kPa. The following data were obtained: Axial load Axial strain, s, (6) (kPa) Au (kPa) 5.5 11.0 24.5 28.5 35.0 50.5 85.0 105.0 120.8 0.05 0.12 0.29 0.38 0.56 1.08 2.43 4.02 9.15 4.0 8.6 19.1 29.3 34.8 41.0 49.7 55.8 9.0 (a) Plot the deviatoric stress against axial strain and excess porewater pressure against axial strain. (b) Determine...
eslblem 2 25 pt)oe Two triaxial compression tests are conducted on identical specimens of the same saturated clay. In the first test the soil is first consolidated to ?.-350 kPa and u.-200 kPa and then sheared under drained conditions increasing the axial stress while keeping the chamber pressure constant. At failure ?i 560 kPa. In the second test, the specimen is consolidated to ?.-600 kPa and uo-400 kPa, then it is sheared under undrained conditions increasing the axial stress while...
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...
Question 4 A sample of soft silty clay from the Thames Estuary is taken from the ground, trimmed to a cylindrical specimen and then placed into a triaxial cell. The sample is compressed isotropically under drained conditions by increasing the cell pressure in the triaxial cell to 450 kN/m², with a back (pore) pressure of 200 kN/m2. At the end of the compression stage the sample is calculated to have dimensions of length = 74.03 mm and diameter = 37.17...
please only answer if you have good personal understanding of problem. i rate. include relevant drawing and details for understanding Problem 8 Consolidated undrained triaxial tests for two similar specimens with different con- solidation stresses were performed and the data in Figure 11.21 is obtained, which includes pore water pressure measurements. Plot Mohr's circles at failure for two specimens in both the total stress and in the effective stress and determine the shear strength parameters c and ф from the...
2. The results of a Consolidated Undrained (CU) triaxial test on a sand soil are in the figures below. The sample was subjected to a vertical load (do). At failure, the Δσ was 914 psi and the induced pore water pressure at failure (Au) was 683 psi. consolidated to a stress of 12 psi and then Au 6.83 psi σ,-12 psi -σ,-12 psi Sand At Failure Initial (Consolidation) A. Draw both the total and effective stress Mohr's Circles at failure...
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...
2.If an additional CU triaxial test with pore pressure measurement is to be performed using a ?3 of 250 kPa on a specimen identical to those in last Problem , estimate the deviator stress (?d) and pore pressure (u) of this additional test at failure. What would potentially be orientation of the failure plane in the specimen? The results below were obtained at failure in a series of consolidated-undrained (CU) triaxial tests, with pore pressure measurement, on specimens of fully...
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...
2. A consolidated undrained triaxial test, in which pore pressure measurements were made, was carried out on a saturated soil with the following results. Given that the initial diameter of the sample was 38 mm in all three cases, determine the values of cohesion and angle of internal friction with respect to (a) total stresses (c and o). (b) effective stresses (c' and o'). The minor and major principal stresses are calculated and presented in the table below (You are...