2.19 A consolidated-drained triaxial test was carried out on a nor- mally consolidated clay specimen, and the following results were recorded: σ 150 kN/m 2 and ΔΟ, -260 kN/m2 An identical specimen from the same clay was subjected to a consolidated-undrained test with a confining pressure of 150 kN/m2, and the additional axial stress at failure was 115 kN/m2 a. What is the pore water pressure at failure in this second specimen? b. What is Skempton's pore pressure parameter A at failure?

2.19 A consolidated-drained triaxial test was carried out on a nor- mally consolidated clay specimen, and the following results were recorded: σ 150 kN/m 2 and ΔΟ, -260 kN/m2 An identical specimen from the same clay was subjected to a consolidated-undrained test with a confining pressure of 150 kN/m2, and the additional axial stress at failure was 115 kN/m2 a. What is the pore water pressure at failure in this second specimen? b. What is Skempton's pore pressure parameter A 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

Related questions

Q: What are Solution Methods available in geotechnical or foundation engineering ?

A: Solution methods available in geotechnical or foundation engineering are:- Bearing Capacity…

Q: A 2 m wide long footing is located at a depth of 2.5 m from the ground surface. The supporting soil…

A: Given, Wdith of foundation, B = 2 m Depth of foundation, D = 2.5 m Cohesion, c = 30 kN/m2 Unit…

Q: subject - geotechnical design book - principle of foundation engineering

A: We have the following formula for vertical stress:

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: We have for elastic settlement the following equation:

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

Q: subject: Geotechnical Engineeringbook: principle of foundation engineering - Braja M Das

A: Determine the effective stress at the top of the clay layer before lowering the water table using…

Q: subject : Geotechnical DesignBook : PRINCIPLE OF FOUNDATION ENGINEERING

A: Given:

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: We are given the following data

Q: A test well with a diameter of 350mm reached 27 meters below the static water table. The water table…

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

Q: Question 01: For the infinite slope with a steady state seepage as shown in figure, Calculate: a)…

A: Let us analyse the question on step 2.

Q: Question 01 A square footing (B*B) must carry a gross allowable load of 42,260 Ib. The base of the…

A: Square footing is provided to the support load on a single column and it is similar to the cube and…

Q: subject: Geotechnical Engineeringbook: principle of foundation engineering - Braja M Das

A: Given

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: q =γ H = 17 x 10 = 170 kN/m², Z= 5 mThe embankment is divided into blocks as shown in figure for…

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: Solution-

Q: Question 05 A site has a level ground surface and a level groundwater table located 5 m below the…

A: The given figure is shown below:

Q: A permeability pumping test was carried out in a confined aquifer with the piezometric level before…

A: Determine a. Depth of water at the farthest observation well (h2) b. Coefficient of Permeability…

Q: A soil profile is shown in Figure below. Calculate the total stress, pore water pressure, and…

A: Determine the total stress, pore water pressure and effective stress at point A and D.

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: Given:γ D = 105 lb/ft³, γ B (sat)= 118 lb/ft³B= 5ftD2= 4ftD1=2ftC= 0Ø=35°

Q: Question 02: For the infinite slope with no seepage in the soil mass as shown in figure below,…

A: Choseeion (c) = 20kN/m2 Φ =16 G =2.75 Let e = 0.50 β = 30 γw = 9.81 kN/m3 Dry unit weight of soil γd…

Q: What are the two main parameters for foundations of structures in terms of Geotechnical Engineering?

A: The foundation of the structures is designed based on the bearing capacity of the soil and the…

Q: Derive general formula used in stress and triaxial test calculations in Geotechnical analysis.

A: Principal of Triaxial Test The Mohr diagram was used to determine the relationship between the major…

Q: subject: Geotechnical Engineeringbook: principle of foundation engineering - Braja M Das

A: Given:

Q: How to solve lack of soil managment in civil engineering?

A: In the field of soil management, the use of activities, techniques, and treatments to preserve soil…

Q: A) Explain in detail the different soil structures and their behavior in foundations of civil…

A: Brief Concept- There are different types of soil structures and each has different properties. These…

Q: Question 07 With reference to figure given below, Calculate elastic settlement at the corner of the…

Q: subject: Geotechnical Engineeringbook: principle of foundation engineering - Braja M Das

A: Soil A with a hump indicates that some of the intermediate size particles are missing. This type of…

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: We are given the following data

Q: Question 01 An undisturbed clay layer is 15 m thick and have a natural moisture content of 45 %. The…

A: given data H=15m w=45% saturated unit weight=17.2KN/m3 G=2.68 liquid limit=65% increased…

Q: A rectangular footing having 3 m length and 2 m width is located at a depth of 1.5 m below the…

A: The depth of footing is Df=1.5 m. The formula to calculate the ultimate bearing capacity of…

Q: A square footing 4m * 4 m is founded at a depth of 7 m below the ground surface in a soil having 39…

A: Given: The size of the square footing is 4 m x 4 m. The depth of the footing is 7 m. The cohesion is…

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: We are given the following data

Q: What are the two main parameters for foundations of structures in terms of Geotechnical Engineering?

A: The foundation of the structures are designed based on the bearing capacity of the soil and the…

Q: subject : Geotechnical DesignBook : PRINCIPLE OF FOUNDATION ENGINEERING

A: Part A:-we have the following loading condition andIn triangle XYZ, we have

Q: subject : Geotechnical DesignBook : PRINCIPLE OF FOUNDATION ENGINEERING

A: We have been given the following data:

Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING

A: We have been given the following information:

Concept explainers

Foundation construction

Question

subject: Geotechnical Engineering

book: principle of foundation engineering - Braja M Das

2.19
A consolidated-drained triaxial test was carried out on a nor-
mally consolidated clay specimen, and the following results
were recorded: σ 150 kN/m 2 and ΔΟ, -260 kN/m2
An identical specimen from the same clay was subjected
to a consolidated-undrained test with a confining pressure
of 150 kN/m2, and the additional axial stress at failure was
115 kN/m2
a. What is the pore water pressure at failure in this second
specimen?
b. What is Skempton's pore pressure parameter A at failure?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Step 10

Trending now

This is a popular solution!

Step by step

Solved in 10 steps with 10 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A consolidated undrained triaxial test was performed on a normally consolidated clay with a critical state friction angle of 230. After an initial isotropic consolidation at a cell pressure of 50 kPa, drainage was turned off, the cell pressure was increased to 85 kPa, and the sample was loaded to ultimate conditions. A pore pressure of 55 kPa was measured at ultimate state. What value of major principal total stress was measured at the ultimate state?
Tri-Axial Tests
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 triaxial shear test was performed on a well-drained sand sample. The normal stress on the failure plane and the shear stress on the failure plane, at failure were determined to be 6100 psf and 4600 psf, respectively. a. Determine the angle of internal friction of the sand? b. Determine the angle of the failure plane? c. Determine the maximum principal stress? Please answer this asap. For upvote. Thank you very much
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?
5. A consolidated, undrained triaxial test is being caried out on a normally consolidated clay where c = 0 and 41= 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 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?
solve the question provided in the image.
• In consolidated-drained triaxial test on a normally consolidated clay, the specimen failed at a deviator stress of 124 KN/sq.m. If the effective stress friction angle is known to be 31°, what was the effective confining pressure at failure?
In a triaxial test, a specimen of saturated [normally consolidated] clay was consolidated under a chamber confining pressure of 80 kPa. The axial stress on the specimen was then increased through the allowing the drainage from the specimen. The specimen fails when 120 kPa. The pore water pressure at the time was 50 kPa. What is the consolidated undrained friction angle [phi]?
a）For clays, the failure line (one that connects the peak failure stresses) in the normally consolidated range does not have a cohesion intercept, whereas the failure line in the overconsolidated range has a cohesion intercept. T or F B）During the shearing phase of a CU test, the void ratio of a NC consolidated clay specimen will: 1 decrease. 2 could increase or decrease. 3 remain a constant. 4 increase. C)What does the cohesion (that appears in the Mohr-Coulomb criterion) of OC clays depend on? 1the preconsolidation pressure. 2whether the failure stresses are total or effective. 3the soil type. 4everything listed here.
In a tri-axial test of normally consolidated clay, the sample subjected to chamber confining pressure of 250 kPa and failed when deviator stress is 350 kPa. Which of the following gives the angle of internal friction? Which of the following gives the shear stress at failure? Which of the following gives the effective normal stress at maximum shear?