For a clay layer in the field, the following are given:H = 7.5'Po = 0.7 ton/ft2Po + AP = 2.5 ton/ft?The relationship between e and P (log scale) for the clay is shown below. (5.625 “) e0 = 0.9213D.40.20.51.52.54.5Pressure, P (log scale), in ton/ft?Calculate the expected settlement due to primary consolidation.Void ratio, e

Given data in question Initial void ratio Depth Stress Overburden stress Graph on semi log scale To…

For a clay layer in the field, the following are given: H = 7.5' Po = 0.7 ton/ft2 Po + AP = 2.5 ton/ft? The relationship between e and P (log scale) for the clay is shown below. (5.625 “) e0 = 0.92 DE D.4 D.2 0.5 1.5 2.5 Pressure, P (log scale), in ton/ft Calculate the expected settlement due to primary consolidation. Void ratio, e

For a clay layer in the field, the following are given: H = 7.5' Po = 0.7 ton/ft2 Po + AP = 2.5 ton/ft? The relationship between e and P (log scale) for the clay is shown below. (5.625 “) e0 = 0.92 DE D.4 D.2 0.5 1.5 2.5 Pressure, P (log scale), in ton/ft Calculate the expected settlement due to primary consolidation. Void ratio, e

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.15P

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question 5 A rectangular footing (4.67 x 4.45 m.) is placed 1.62 m. below the ground surface. The soil arrangement is composed of sand (ground) for the first 6.22 meters and followed by clay for the next 5.85 meters. The force acting on the footing is 10,929 kN. Determine the settlement of the consolidating layer in mm. Assume a 2V:1H pressure diagram. Unit weight of sand = 16.6 kN/m3. Clay has the following properties: Unit weight = 18.6 kN/m3, Void ratio = 28, Liquid limit = 43. Round off to two decimal places.
For the layered soil shown in the figure, H1 = 5 m, H2 = 5 m, and H3 = 20 m. The soil densities are ρ1=2040kg/m3, ρ2=1940kg/m3, and ρ3′=1020kg/m3. What is the effective stress at the bottom of soil 3 when h' = 15 meters? CHOICES A. 142.7 kPa B. 150.1 kPa C. 163.8 kPa D. 136.8 kPa
2) A soil profile consisting of three layers is shown in the Figure. A) Calculate the values of σ, u and σ' at points A,B,C and D if Layer 1: H1=5m, e=0.7, Gs=2.69 Layer 2: H2=8m, e=0.55, Gs=2.7 Layer 3: H3=3m, w=38%, e=1.2 B) What is the change in effective stress at point C if: If the water table drops by 2m? If the water table rises to the surface up to point A? Water level rises 3 m above point A due to flooding?
A rectangular footing (4.55 x 4.8 m.) is placed 1.42 m. below the ground surface. The soil arrangement is composed of sand (ground) for the first 5.55 meters and followed by clay for the next 5.98 meters. The force acting on the footing is 10,647 kN. Determine the settlement of the consolidating layer in mm. Assume a 2V:1H pressure diagram. Unit weight of sand = 16.7 kN/m3. Clay has the following properties: unit weight = 18.9 kN/m^3, void ratio=30, liquid limit = 43
A soil profile is shown bellow. Given: H1 =1.83 m, H2= 0.91 m, H3=1.83 m. Determination of Unit Weight of each layers. Calculate σ, u, and σ’. Plot the variation of σ, u, and σ’ with depth.
The compression diagram for a precompressed clay indicates that it had been compressed under a pressure of 240 kN/m2. The compression index is 0.9; its void ratio under a pressure of 180 kN/m2 is 1.5. Estimate the void ratio if the pressure is increased to 360 kN/m2. a. 0.70 b. 1.246 c. 1.46 d. 1.34
The void ratio of a clay is 1.56 and its compression index is found to be 0.8 at the pressure 180 kN/m2. What will be the void ratio if the pressure is increased to 240 kN/m2? a.1.460 b.1.246 c.1.340 d.0.700
A rectangular footing (4.5 x 4.36 m.) is placed 1.98 m. below the ground surface. The soil arrangement is composed of sand (ground) for the first 6.94 meters and followed by clay for the next 6.78 meters. The force acting on the footing is 10,700 kN. Determine the settlement of the consolidating layer in mm. Assume a 2V:1H pressure diagram. Unit weight of sand = 16.9 kN/m3. Clay has the following properties: Unit weight = 18.3 kN/m3, Void ratio = 95, Liquid limit = 49. Round off to two decimal places.
A layered soil is shown in Figure 7.33. Given: • H1 = 1.5 m k1 = 9 × 104 cm/sec• H2 = 2.5 m k2 = 7.8 × 10−3 cm/sec
Refer to the soil profile shown. Given H1 = 8.3 m., and H2 = 4.43 m. If the ground water table rises by 2.29 meters, determine the change in effective stress (numerical value only, in kPa) at the bottom of the clay layer. Properties of dry sand: Gs = 2.59, e = 0.61. Properties of clay: Gs = 2.74, e = 0.86. Round off to two decimal places.
Q#3: For a normally consolidated clay layer in the field, the following values are given. Thickness of clay layer = 2.6 m Compression index = 0.28 Average effective pressure on clay layer 127 KN/m² Secondary compression index = 0.02 Δσ’ = 46.5 KN/m² Void ratio = 0.8 Time of Primary settlement = 1.5 years What is the total consolidation of the clay layer five years after the primary consolidation settlement?
If a representative clay specimen 20 mm thick, under double drainage, took 121 minutes for 90% primary compression, estimate the time in days required for 50% primary compression of a field layer 2 m thick, bounded by impervious boundary at the bottom and sand at the top. a.679 b.781 c.650 d.725