solve the problem 11-29 as shown in the figure. 11-29. A silty sand is tested consolidated-drained in a triaxial cell whereboth principal stresses at the start of the test were 500 kPa. If thetotal axial stress at failure is 1.63 MPa while the horizontal pressureremains constant, compute the angle of shearing resistance and thetheoretical orientation of the failure plane with respect to thehorizontal.11-30. The silty sand of Problem 11-29 was inadvertently tested consoli-dated-undrained, but the laboratory technician noticed that thepore pressure at failure was 290 kPa. What was the principal stressdifference at failure?11-31, If the consolidation pressure in the CU test of Problem 11-30 were1000 kPa instead of 500 kPa, estimate the pore pressure at failure,11-32. A sample of sand failed when (o, - o3) was 900 kPa. It thehydrostatic consolidation stress were 300 kPa, compute the angleof shearing resistance of the sand. What else can you say about thesand?11-33. If the sample of Problem 11-32 were sheared undrained and theinduced pore pressure at failure were 200 kPa, estimate the prin-cipal stress difference at failure. What would be the angle ofshearing resistance in terms of total stresses?11-34. A sample of sand at the field density is known to have a (0,/03)maxof 4.0. If such a specimen is hydrostatically consolidated to 1210kPa in a triaxial test apparatus, at what effective confining pres-sure aj, will the sample fail if the vertical stress is held constant?(This is. a lateral.extension test.)

Answered: Image /qna-images/answer/fb4baf58-70b7-418d-8480-4419cb768d51.jpg

11-29. A silty sand is tested consolidated-drained in a triaxial cell where both principał stresses at the start of the test were 500 kPa. If the total axial stress at failure is l1.63 MPa while the horizontal pressure remains constant, compute the angle of shearing resistance and the theoretical orientation of the failure plane with respect to the horizontal. %3D 11-30. The silty sand of Problem 11-29 was inadvertently tested consoli- dated-undrained, but the laboratory technician noticed that the pore pressure at failure was 290 kPa. What was the principal stress difference at failure?

11-29. A silty sand is tested consolidated-drained in a triaxial cell where both principał stresses at the start of the test were 500 kPa. If the total axial stress at failure is l1.63 MPa while the horizontal pressure remains constant, compute the angle of shearing resistance and the theoretical orientation of the failure plane with respect to the horizontal. %3D 11-30. The silty sand of Problem 11-29 was inadvertently tested consoli- dated-undrained, but the laboratory technician noticed that the pore pressure at failure was 290 kPa. What was the principal stress difference at failure?

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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