Answered: Using = 0 analysis and assuming planar…

Using = 0 analysis and assuming planar failure as shown, the minimum factor of safety against shear failure of a vertical cut of height 4 m in a pure clay having c= 120 kN/m² and Ysat = 20 kN/m³ is

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.21P

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In a site consisting entirely of clays, an electric friction conepenetrometer measures the cone resistance qc at a depth of8.0 m as 0.75 MN/m2. The water table is at 3.0 m below theground level. The unit weights of the clay above and belowthe water table are 16.5 kN/m3 and 19.0 kN/m3, respectively.Estimate the undrained shear strength, preconsolidationpressure, and overconsolidation ratio at this depth.
* l. ۱۲:۳۸ Screenshot 2021-02-.. 2.21 The data from a series of consolidated-undrained triaxial tests are summarized below. Draw the three Mohr circles, plot the failure envelope in terms of effective stresses, and find c' and o'. Additional axial Pore water Cell pressure (kN/m?) Sample stress at failure pressure at number (kN/m?) failure (kN/m2) 1 100 88.2 57.4 2 200 138.5 123.7 3 300 232.1 208.8
Compute the cohesion of the clay. The results of a three consolidated undrained tri-axial tests on a saturated clay are as follows : a. 10.45 kPab. 12.25 kPac. 11.62 kPad. 15.62 kPa
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What is the natural period of a layered soil with medium gravel of depth 40m? Is it safe to build a multi-storey building with fundamental period of vibration equal to 1.5 seconds, as that displayed in the figure below, on a site with the above soil type? Is this site more suitable for a particular type of structure shown below? T=1.5 secs T=4.5 secs T=0.2 secs V,=780 m´sec T= ? H=40m
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Compute the angle of internal friction. The results of a three consolidated undrained tri-axial test on saturated clay are as follows: a. 15.03°b. 12.06°c. 18.40°d. 31.05°
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An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface. 5 m 1H:2V 1H:2V 1H:1V 8 m 13 y=18 kN/m Y=18 kN/m³ 6 m : B : A CS Scanned with CamScanner