Two similar clay soil samples were pre-consolidated in triaxial equipment with a chamber pressure of 600 kN/m². Consolidated-drained triaxial tests were conducted on these two specimens. The following are the results of the tests: Specimen 1: Specimen 2: KN 3=100- kN m² σ3 = 50. m kN (Δσα), = 410.6- kN (40₂), = 384.374 m m

Two similar clay soil samples were pre-consolidated in triaxial equipment with a chamber pressure of 600 kN/m². Consolidated-drained triaxial tests were conducted on these two specimens. The following are the results of the tests: Specimen 1: Specimen 2: KN 3=100- kN m² σ3 = 50. m kN (Δσα), = 410.6- kN (40₂), = 384.374 m m

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The results of two consolidated drained test tri axial tests on a clay are given below specimen 1: chamber pressure = 105 deviator stress = 220 specimen 2: chamber pressure = 210 deviator stress = 400 1. determine the angle of internal friction 2. determine the cohesion of clay 3. determine the normal stress on the point on the failure plane of the 2nd specimen
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The following data are given for the laboratory sample. go' = 175 kPa ; e = 1.1; 00¹+ Ago' = 300 kPa ; e = 0.9 If thickness of the clay specimen is 25 mm, the value of coefficient of volume compressibility is x 10-4 m² /kN
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A consolidated-drained triaxial test was conducted on a normally consolidated clay. The results are as follows: • 03 = 16 lb/in. • (Aoa) = 25 lb/in. Determine a. Angle of friction, d'
4. The construction of a 10m x 10m square water tank in a residential neighbourhood has been planned. As indicated in Figure below, a 6m thick soft clay layer was discovered between sand layers during site exploration. For laboratory studies, an undisturbed soil sample was obtained in the middle of the soft clay layer. The findings of the laboratory consolidation test are listed below. Pressure, o' (kN/m2) | 25 50 100 200 400 800 Void Ratio, e 1.28 1.26 1.22 1.14 1.05 0.95 i. Find the preconsolidation pressure (o'c), Virgin, and Laboratory Compression Index using the information above (Cc). Find the primary consolidation settlements that will occur at the water tank's centre due to compression of the soft clay layer ii. 10 m Load = 18,000 kN Ground Level 1 m Ground water level Dense Sand, y= 20 kN/m³ 2 m Soft Clay Kat = 16 kN/m³ ; eo= 1.38 Cc = graph? ; Cs =Cc; o' = graph? 6 m %3D %3! Very Dense Sand
2. The results of a consolidated-drained triaxial test conducted on a normally consolidated clay are as follows: Chamber confining stress = 220 KPa Deviator stress at failure = 320 KPa (a) Angle of friction (b) Angle of failure (c) Normal and Shear stress on the failure plane Calculate:
It is known that a particular deposit of clay has the following shear strength parameters: c' = 15 kPa, o' = 23°; Cu = 10 kPa, cu = 13° A sample of this clay is consolidated in a triaxial cell to an all-round pressure (03) of 250 kPa. The sample is then sheared by increasing 0₁, keeping 3 constant and the drainage valve closed. What is: i) ₁ at failure? ii) Pore water pressure inside the sample at failure? iii) Final values of 0₁' and 03'? iv) Value at failure of Skempton's pore pressure coefficient A?
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2- The following are the results of four drained direct shear tests on undisturbed normally consolidated clay samples having a diameter of 2.0 inches and height of 1.0 inch. a) Draw a graph on excel for shear stress at failure against the normal stress and determine the drained angle of friction from the graph. b) If a drained triaxial test is conducted on the same soil with a chamber confining pressure of 4,344 lb/ft², what would be the deviator stress at failure? c) For part b, what is the inclination of the failure plane with the major principal plane? Shear Force at Test No. Normal Force (lbf) Failure (lbf) 1 56.2 31.2 84.3 47.0 101.1 56.2 121.4 67.4 23+ 2 4
A Sample of Clay is isotropically normally consolidated to a cell pressure of 350kPa. The sample was then sheared (standard) in a drained state. Calculate values of q, p', and v at failure if the soil constants were: M=0.88, N=2.88, I-2.76, and 2-0.16