Undisturbed samples of a silty-clay have been collected from a site. The tabulated results in Fig. 1.1 were obtained at failure in a series of consolidated-undrained (CU) tests (with pore water pres- sure measurement) on the samples. The cross-sectional area of the sample is 1210 mm² You are required to determine the values of the drained shear strength parameters of the soil c' and '. All-round cell pressure (kPa) Pore water pressure (kPa) Deviator stress (kPa) σ3 200 140 126 450 283 243 600 360 325 Figure 1.1: Results of a series of CU tests on silty-clay. In your summary of results, at a minimum you are to include the following: 1. A table containing values calculated from the results of the three tests, including a column for the additional axial load that must have been applied at failure for each test, and the principal stresses σ3, 01, 03, and σ. 2. A plot showing the Mohr's circles and strength envelope used to determine c' and '. On your plot clearly mark the principal stresses, c' and '. Ensure your plot is to scale, and labels specify what the x and y axes are. 3. Your reported c' and ' for the silty-clay.
Undisturbed samples of a silty-clay have been collected from a site. The tabulated results in Fig. 1.1 were obtained at failure in a series of consolidated-undrained (CU) tests (with pore water pres- sure measurement) on the samples. The cross-sectional area of the sample is 1210 mm² You are required to determine the values of the drained shear strength parameters of the soil c' and '. All-round cell pressure (kPa) Pore water pressure (kPa) Deviator stress (kPa) σ3 200 140 126 450 283 243 600 360 325 Figure 1.1: Results of a series of CU tests on silty-clay. In your summary of results, at a minimum you are to include the following: 1. A table containing values calculated from the results of the three tests, including a column for the additional axial load that must have been applied at failure for each test, and the principal stresses σ3, 01, 03, and σ. 2. A plot showing the Mohr's circles and strength envelope used to determine c' and '. On your plot clearly mark the principal stresses, c' and '. Ensure your plot is to scale, and labels specify what the x and y axes are. 3. Your reported c' and ' for the silty-clay.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Undisturbed samples of a silty-clay have been collected from a site. The tabulated results in Fig.
1.1 were obtained at failure in a series of consolidated-undrained (CU) tests (with pore water pres-
sure measurement) on the samples. The cross-sectional area of the sample is 1210 mm² You are
required to determine the values of the drained shear strength parameters of the soil c' and '.
All-round
cell
pressure
(kPa)
Pore water
pressure
(kPa)
Deviator
stress
(kPa)
σ3
200
140
126
450
283
243
600
360
325
Figure 1.1: Results of a series of CU tests on silty-clay.
In your summary of results, at a minimum you are to include the following:
1. A table containing values calculated from the results of the three tests, including a column
for the additional axial load that must have been applied at failure for each test, and the
principal stresses σ3, 01, 03, and σ.
2. A plot showing the Mohr's circles and strength envelope used to determine c' and '. On
your plot clearly mark the principal stresses, c' and '. Ensure your plot is to scale, and
labels specify what the x and y axes are.
3. Your reported c' and ' for the silty-clay.
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