MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 2 terms (12 months)
9th Edition
ISBN: 9781305971264
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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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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Consider the soil profile shown in figure subjected to the uniformly distributed load, Delta sigma = 950 lb/ft^2, on the ground surface. Given: H_1 = 6 ft; H_2 =16 ft; and H_3 = 18ft. Soil characteristics are as follows: Sand: gamma_d = 114 Ib/ft^3, gamma_sat = 118 Ib/ft^3 Clay: gamma_sat = 117 Ib/ft^3; C_c = 0.24; e = 0.69; C_s = C_c/5 Estimate the primary' consolidation settlement in the clay if The clay is normally consolidated The preconsolidation pressure sigma'_c = 2300 Ib/ft^2
a=1
b=5
c=5
d=0
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
Chapter 11 Solutions
MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 2 terms (12 months)
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- Answer in three decimal places pleasearrow_forwardConsider the soil profile shown in Figure 11.44 subjected to the uniformly distributed load, Ds, on the ground surface. Given: Ds = 26 kN/m2; H1 = 1.83 m; H2 = 3.66 m; and H3 = 5.5 m. Soil characteristics are as follows: Sand: gdry =17.9 kN/m3; gsat =18.5 kN/m3 Clay: gsat =18.3 kN/m3 ; LL = 38; e = 0.73; Cs = 1/5 Cc Estimate the primary consolidation settlement in the clay if The clay is normally consolidated The preconsolidation pressure s’c = 105 kN/m2arrow_forwardIn Situ Stresses of Soil A soil profile consisting of three layers is shown in the figure below. Layer 1 B. Groundwater table H2 Layer 2 Layer 3 O Dry sand O Sand I Clay O Rock Calculate the values of o, u, and o' at points A, B, C, and D for the following cases. Note that y, = 9.81 kN/m³. Layer no. Thickness Soil parameters H1 = 2 m На %3 3.59 m H3 = 1.73 m Ya = 17.25 kN/m³ Ysat = 19.01 kN/m³ Ysat = 18.3 kN/m³ 1 3 1. Point kN/m² u o' Aarrow_forward
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- The soil profile at a site consists of 5 m sand underlain by clay layer. The ground water table is 2 m below the ground surface. Average void ratio of sand is 0.52. Water content of clay is 42% and degree of saturation of sand above water table is 37%.Assume specific gravity of sand and clay is 2.65. 1. Compute the unit weight of clay. a. 19.82 kN/m³ b. 17.47 kN/m³ c. 18.62 kN/m³ d. 16.20 kN/m³ 2. Compute the total pressure 10 m below the ground surface. a. 185.41 kPa b. 160.25 kPa c. 140.53 kPa d. 153.62 kPa 3. Compute the effective pressure 10 m below the ground surface. a. 106.94 kPa b. 96.52 kPa c. 115.62 kPa d. 108.36 kPaarrow_forwardhiarrow_forwardstion 17 | Dry Sand H Groundwater Table Clay Refer to the soil profile shown. Given H1 = 8.93 m., and H2 = 5.32 m. If the ground water table rises by 2.01 meters, determine the change in effective stress (numerical value only, in kPa) at the bottom of the clay layer. Properties of dry sand: Gs = 2.56, e = 0.65. Properties of clay: Gs = 2.72, e = 0.87. Round off to two decimal places.arrow_forward
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