Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 11, Problem 11.10P
(a)
To determine
Calculate the primary consolidation settlement of the clay if the clay is normally consolidated.
(b)
To determine
Calculate the primary consolidation settlement of the clay if the preconsolidation pressure
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The soil profile shown in Figure 4.2 is subjected to the uniformly distributed load, Ao,
on the ground surface. Given Ao = 15 kN/m2; H1 = 2 m; H2 = 3.5 m; and H3 = 5 m. Soil
characteristics are as follows:
*Sand: ya = 16.5 kN/ms; ysat = 19 kN/m3
*Clay: ysat = 18 kN/m:; LL = 31 %; e = 0.65; Cs = (1/5) C.
Use: Ce= 0.009( LL – 10)
a. Estimate the primary consolidation settlement in the clay (in mm.) if: The
preconsolidation pressure, oc= 621 kN/m2
b. Estimate the value of the void ratio at the end of the primary
consolidation which will be used for the analysis of the secondary consolidation
Aar
O Sand
Clay
EXAMPLE 9.8
A soil profile is shown in Figure 9.24. Given: H₁
Plot the variation of o, u, and o' with depth.
H₁
H₂
B
Zone of capillary rise
G₁ = 2.66; e = 0.55
Degree of saturation = S = 50%
Sand
Saturated clay
= 2 m, H₂ = 1.8 m, H3 = 3.2 m.
Rock
G₁ = 2.66
e = 0.55
Sand
Groundwater table
w 42% (moisture content)
G₁ = 2.71
Clay
Subject Geotechnical engineering : soil mechanics
A layer soil shown has the following data
H1= 3m. K1= 2x10^-2 cm/sec
H2= 4m K2= 3.2x10^-2 cm/sec
H3= 6m K3= 4.1 x 10^ -2 cm/sec
Compute the equivalent coefficient of permeability in vertical direction.
Compute the velocity if h= 4m
Chapter 11 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- What is the equivalent coefficient of permeability (k) for all soil layers? where equivalent k(2 and 3) = 1.24 k1 and k4 = 4.41 k1 28 8 A K2 ~ K1 K4 K3 N .a k1 2.174 .b k1 1.511 .c k1 2.237 .d k1 28.250 Your answer is incorrect The correct answer is: 1.511 k1 10arrow_forwardGiven the soil element shown in figure below, (Using equation: AND Mohr' Circle a. Major and Minor Principal Stress b. Normal and Shear Stress on plane AB c. Maximum in plane shear stress Please answer this asap. For upvote. Thank you very mucharrow_forwardQuestion 33 Dry Sand H, Groundwater Table Clay H, Refer to the soil profile shown. Given H1 = 9.89 m., and H2 = 5.8 m. If the ground water table rises by 3.78 meters, determine the change in effective stress (numerical value only, in kPa) at the bottom of the clay layer. Properties of dry sand: Gs = 2.53, e = 0.63. Properties of clay: Gs = 2.75, e = 0.81. Round off to two decimal places.arrow_forward
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