10.11 A consolidated drained triaxial test was carried out on a normally con- solidated clay specimen with confining pressure of 75.0 kN/m². The deviator stress at failure was 96.0 kN/m². An identical specimen of the same clay was subjected to a consolidated undrained triaxial test, where the confining pressure is 150.0 kN/m². The deviator stress at failure was 115.0 kN/m². What would be the pore water pressure at failure?

10.11 A consolidated drained triaxial test was carried out on a normally con- solidated clay specimen with confining pressure of 75.0 kN/m². The deviator stress at failure was 96.0 kN/m². An identical specimen of the same clay was subjected to a consolidated undrained triaxial test, where the confining pressure is 150.0 kN/m². The deviator stress at failure was 115.0 kN/m². What would be the pore water pressure at failure?

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter12: Shear Strength Of Soil

Section: Chapter Questions

Problem 12.20P

See similar textbooks

Similar questions

A drained triaxial test was conducted on a normally consolidated clay specimen with a chamber confining pressure of 145 kN/m2. At failure, the deviator stress was 198 kN/m2. Determine the soil friction angle.
A drained triaxial test on a normally consolidated clay showed that the failure plane makes an angle of 58° with the horizontal. If the sample was tested with a chamber confining pressure of 103.5 kN/m^2, what was the major principal stress at failure?
A consolidated drained (CD) triaxial test was carried out on a normally consolidated clay. The specimen was consolidated under a cell pressure of 100 kPa and back pressure of 30 kPa. The axial deviatoric stress was increased very slowly to failure, so that there was no excess pore water pressure developed during the shearing. The specimen failed under a deviatoric stress of 130 kPa. The back pressure of 30 kPa was maintained throughout the test. (1) What is the friction angle in terms of effective stresses? (ii) What are the shear stress and normal stress acting on the failure plane?
A consolidated-drained triaxial test was conducted on a normally consolidated clay with a chamber pressure, σ3 = 276 kN/m2. The deviator stress at failure is = 276 kN/m2. Determine: a. The angle of friction b. The angle θ that the failure plane makes with the major principal plane c. The normal stress, σf, and the shear stress, τf, on the failure plane
A saturated clay sample in an oedometer is under vertical pressure of 120 kPa and is at a normally consolidated state. The void ratio and the sample height at this stage are 1.21 and 18.40 mm respectively. When the vertical stress was increased to 240 kPa at the end of the consolidation, the thickness of the sample was reduced to 16.80 mm. When the vertical pressure was reduced to the original value of 120 kPa, the sample heaved to a thickness of 16.95 mm. Estimate both the compression index and recompression index of the clay. What would be the reduction in thickness from now if the vertical pressure was increased by 200 kPa? What is the average coefficient volume compressibility during this pressure increment?
A consolidated drained (CD) triaxial test was carried out on a normally consolidated clay. The specimen was consolidated under a cell pressure of 100 kPa and back pressure of 30 kPa. The axial deviatoric stress was increased very slowly to failure, so that there was no excess pore water pressure developed during the shearing. The specimen failed under a deviatoric stress of 130 kPa. The back pressure of 30 kPa was maintained throughout the test. (i) What is the friction angle in terms of effective stresses? (ii) What are the shear stress and normal stress acting on the failure plane? Solution fast please
A 75 mm diameter clay specimen was consolidated in an oedometer under 200 kPa. At the end of consolidation, the void ratio is 0.863 and the specimen thickness is 18.51 mm. When the stress increment of 200 was added to the current vertical stress of 200 kPa, the specimen consolidated to a thickness of 17.56 mm. Assuming that the clay was normally consolidated under the vertical stress of 200 kPa, find the a) coefficient of volume compressibility in (MPa)^-1 and rounded to the 3rd decimal place.b) and the compression index of the clay rounded to the 2nd decimal place.
A consolidated-drained triaxial test was conducted on a normallyconsolidated clay. Compute the angle, θ that the failure plane makes with the major principal stress, if the laboratory test results is givenas follows
17. The results of a consolidated drained test for a normally consolidated clay were as follows: chamber confining pressure = 300 Kpa and deviator stress = 400 KPa a. Compute the angle of friction of the clay sample b. Compute the shear stress at failure plane c. Compute the normal stress on the plane of maximum shear.
A consolidated-drained triaxial test was conducted on a normally consolidated clay.The results were as follows:σ3 = 276 kN/m2(Δσd)f = 276 kN/m2a. Find the angle of friction. ϕ'.b. What is the angle that the failure plane makes with the major principal stress?c. C. Determine the normal stress σ' and the shear stress τf on the failure plane.
A consolidated drained triaxial is conducted on a normally consolidated soil with chamber confining pressure of 152kPa. If the deviator stress failure is 250kPa, determine the following: a. Calculate the angle of friction of the soil (degrees) b. Calculate the shear stress at the failure plane (kPa) c. Calculate the normal stress at the failure plane (kPa)