1. To evaluate shear strength to be used in stabilityanalysis of a slope, two drained direct shear testshave been performed on samples of a highlyoverconsolidated clay. One test was carried out ona remolded sample under effective vertical stressof 300 kPa, and a shear strength of 121 kPa wasmeasured. The second test was carried out on aprecut sample under effective vertical stress of 300kPa, and a shear strength of 48 kPa was measured.On the basis of previous field experience with theoverconsolidated plastic clay, it is expected thatthe peak (intact) strength envelope will show acohesion intercept c' (mob) of 10 kPa for effectivenormal stress range near 200 kPa. Compute theshear strength to be used on a segment of a slipsurface on which the effective normal stress is 200kPa, if the slip plane passes through: (a) materialthat is badly fissured and jointed; however, there isno preexisting continuous plane of discontinuity;(b) material that contains a preexisting plane ofdiscontinuity oriented in the direction of globalmovement; (c) material that according to bore holerecords appears to be free of joints and fissures andthere is no preexisting plane ofdiscontinuity; and (d) if for condition (b) the factorof safety was equal to 1.2, compute the factor ofsafety if the porewater pressure at the slip planeincreases by 50 kPae 3:16 /

According to given dataA) Material is badly fissured and jointed because of it will not show own…

Answered: e been performed on samples of a highly…

e been performed on samples of a highly consolidated clay. One test was carried ou molded sample under effective vertical stre 10 kPa, anda shear strength of 121 kPa wa

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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Following are possible testing to determine the shear strength of clay in the laboratory, please choose the correct and appropriate combination for lab testing. * I. Direct shear test II. Unconfined Compressive Strength III. Vane Shear test IV. Standard Penetration Test V. Consolidated Isotropic Drained triaxial test VI. Dutch Cone penetrometer O All above O 1,1l and III O I,II and VI O IV, V, VI
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5. A consolidated, undrained triaxial test is being carried out on a normally consolidated clay where c - 0 and p'= 26'. The triaxial specimen was consolidated under a cell pressure of 300 kPa and backpressure of 80 kPa. Skempton's A parameter at failure is estimated to be 0.80. The drainage valve has since been dosed and the vertical deviator stress increased to failure. What would be the deviator stress and pore water pressure at failure?
A consolidated, undrained tri axial test was carried out on a 73.0 mm diameter and 146.6 mm-long decomposed granodiorite sample at an initial water content of 26%. The sample was obtained from Palmerston Highway, North Queensland, Australia, to back-analyze a slope failure, and wasinitially consolidated under a cell pressure of 200 kPa and backpressure of 150 kPa. The drainage valvewas dosed and the cell pressure was increased to 254 kPa when the pore water pressure increased to182 kPa. Find Skempton's B-parameter. The nature of the soil sample is such that it was not possibleto achieve a higher B value. The drainage valve was opened and the sample was consolidated furtherunder the cell pressure of 254 kPaand backpressure of 150 kPa. At the end of consolidation, the drainage valve was dosed, locking in thebackpressure in preparation for the undrained loading. The axial strain 8, additional vertical stressapplied to the sample under undrained conditions Δσ', and the pore water pressure…
4. A sandy soil sample was subjected to a consolidation pressure of 100 kPa and Consolidated drained test was conducted on it. The failure plane angle which the sample made at failure with respect to horizontal was 60°. Find the vertical stress at failure. If instead of increasing the vertical stress, it was decreased gradually, explain why the sample would fail. Obtain the shear and normal stress at failure for both of these conditions.
The results below were obtained at failure in a series of consolidated-untrained triaxial tests, with pore water pressure measurement, on specimens of a fully saturated clay. Determine the values of the shear strength parameters c' and 'If a specimen of the same soil were consolidated under an all-round pressure of 300 kN/m² and the principal stress difference applied with the all-round pressure changed to 400kN/m², what would be the expected value of principal stress difference at failure" 150 300 450 600 03 (kN/m²) 01-03 (kN/m²) u (kN/m²) 103 202 305 410 82 169 252 331
Q18 Please provide justified answer asap
2- A three-axis compression test on a clay sample that is comprehensive and normal up to a stress of 300 kPa and a specific volume of 2 Consolidated is done, The values of q and volumetric strain are measured at axial strain, 0, 2 and 10 percent (failure) . The value of N is equal to 3 and A is equal to 0.2. Graph of all-round stress on initial all-round stress Draw the initial all-round stress in terms of section
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