Calculate total stress, pere wev s at B, A Dry Sand Void ratio = 0.52 3m %3D G, = 2.65 %3D Sand Void ratio = 0.52 2.5 m %3D G, = 2.65 C Clay Water content = 45% 2 m Void ratio = 1.22
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Q: Example 22 se For a normally consolidated clay (c' = 0) these are the results for a consolidated…
A: Deviator stress = sigma1 - Sigma3 Chamber pressure = Sigma3
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A: Following is the given soil profile:
Q: Question Attached
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A: Calculating the total stress: σ=γd1×h1+γt1×h2+γt2×h3 =13.1×2+18×2.5+19.8×4.5 =160.3 KN/m2
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- In a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 1b/in2 and friction angle is 210 . Calculate the effective confining pressure at failure.? A) 21 1b/in2 B) 22.2 1b/in2 C) 25.4 1b/in2 D) 17.9 1b/in2Example 22 a For a normally consolidated clay (c' = 0) these are the results for a consolidated drained triaxial test Chamber pressure = 104 kN/m² Deviator stress at failure = 125 kN/m² a) Find the angle of friction, ' (Answer: 22) b) Determine the angle 9 that failure plane makes with the major principle plan (Answer: 56) TOI-OHOMAI Institute of Technology Example 3 The equation of effective stress failure envelope for normally consolidated clayey soil is Tf = o'tan 27 A drained triaxial test was conducted with the same soil at the chamber confining pressure of 100 kN/m². Calculate the deviator stress at failure (Answer: 166.3 kN/m²)PROBLEM 1: A layer of sand 4.5m thick with specific gravity of 2.60, degree of saturation of 85%, and porosity of 41.18% with a 5 m thick of clay with specific gravity of 2.65 and a water content of 0.28. Ground water table is located at the interface of the two soils. Compute the depth below the ground surfac would the effetive stress be 100kPa. B. Compute the effective stress at a depth 8m below the ground surface. C. Compute the depth of excavation required to reduce the effective stress by 60 kPa
- The coefficient of permeability of a sand at a void ratio of 0.62 is 0.03 cm/sec. estimate the coefficient of permeability at a void ratio of 0.48. a. Using Casagrande equation b. Using kozeny - Carman equation.Give the correct option In a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 lb/in2 and friction angle is 21°. Calculate the effective confining pressure at failure?a) 21 lb/in2 b) 22.2 lb/in2 c) 25.4 lb/in 2 d) 17.9 lb/in2QUESTION: 5 Water is flowing in an upward direction through a stratum of sand, 4 m thick, under a total head difference of 2 m. The sand has a specific gr. of 2.65 and void ratio of 0.065. The factor of safety against quick sand condition would be
- A consolidated-undrained test on a normally consolidate clay yield the following results: Confining Pressure = 159 KPa; Deviator Stress = 183 KPa; Pore Pressure = 78 KPa. Calculate the consolidated drained friction angle.be the hydraulic conductivity at 20 Docs A20 pe 4. For a normally consolidated clay, the following values are given. k (cm/sec) 0.45 x 106 0.78 1.1 0.88 x 106 Estimate k at a void ratio of 0.97surface layer QY A Soil profile consists of a surface of Line sand 6m thick with unit weight of 16-5 kN/m³ and clay layer of 8m thick beneth the Sand layer. the water table is located at adepth of 4m below the ground surface: submergend for line Sand is 10.4 kN/m², Gs love clay layer is 2.7 & wc %. = 30% Calculate the eflective stress at the middle of clay Layer. + 6m 4M DW.T Fine Sand 8m clay 8=165& M2 sub = 1o.y tw G3=2=7 w;. = 30%.
- be the hydraulic conductivity at 20°C? Ans. 1.0 x 10 cm/sec 4. For a normally consolidated clay, the following values are given. k(cm/sec) 0.45 x 10 e 0.78 1.1 0.88 x 10 Estimate k at a void ratio of 0.97 6.0089 107How high should the groundwater table be so that the effective stress at C is equal to 110 kPa? (1.67 m) GWT e= 0.61 Gs 2.66 4.0 m H = ? 5.0 mPROBLEM The results of two triaxial shear tests on CH clay whose plasticity index is 50, unit weight 20kN/m³ are given below. Determine the shearing resistance of this clay at a depth of 15m by assuming (a) the clay is normally loaded(NL); and then (b) clay is overconsolidated(oC) TEST No 1 2 CELL PRESSURE(03)kPa 100 200 DEVIATOR STRESS (oa) 120 145
