Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.13P
To determine
Find the depth of embedment.
Find the anchor force.
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An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 9from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Compute the stress in kPa at depth of 20 m.
a. 192.8 b. 62.5 c. 21.6 d. 372.8
3
A soil profile consists of a clay layer
underlain by a sand layer, as shown in the
figure. If a tube is inserted into the bottom
sand layer and the water level rises above
the ground surface, Determine the effective
vertical stress in kPa at B. *
3.2 m
GWL ↑1 m Yst = 18.5 kN/m³
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Clay
2 m Ysat = 19.0 kN/m³
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|1.5 m Ysat = 17.0 kN/m³
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Sand
В
2 m
The value must be a number
B
A
6.0m
Ce
5.0 m
4
Chapter 18 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 18 - Refer to Figure 18.9. A cantilever sheet pile is...Ch. 18 - Prob. 18.2PCh. 18 - Prob. 18.3PCh. 18 - Refer to Figure 18.13. Given L1 = 1.5 m, L2 = 3 m;...Ch. 18 - In Problem 18.4, find the maximum bending moment...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Refer to Figure 18.23. Given L1=3m, L2=6m,...Ch. 18 - Prob. 18.10P
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- An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 9from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Compute the stress in kPa at depth of 20 m. Show free body diagram a.21.6 b.372.8 c.192.8 d.62.5arrow_forwardAn embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 9from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Estimate the shear strength of the material on a horizontal plane at a point 20 m below the surface of the embankment. Include fbdarrow_forwardAn embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 (from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Compute the effective stress in kPa at a depth of 20 m. If the pore pressure at this point is shown by a piezometer to be 180 kPa. a. 62.5 b. 372.8 c. 192.8 d. 21.6arrow_forward
- e = 20° 4 m Stream Rock outcrop Canal FIGURE P6.12 6.12 An excavation is made for a canal that is fed by a stream, as shown in Figure P6.12. The measured flow into the canal is 0.25 × 10¬ª m³/s per unit area. Two porewater pressure transducers, A and B, placed along a line par- allel to the slope and approximately at the canal mid- height gave readings of 3 kPa and 2.5 kPa. Assuming flow parallel to the slope, estimate the hydraulic conductivity.arrow_forwardPoint loads of magnitude 100,200,and 400kN act at B, C, and D, respectively. Determine the increase in vertical stress at a depth of 6m below point A. Use Boussinesq's equation. er 6: Vertical Stress Increase in Soil 6 m B C 3 m 6 m D Figure P6.2 6.3 Refer to Figure P6.3. Determine the vertical stress increase Ao at|arrow_forwardA trench was cut in a clay slope as shown in the figure. When the trench reached a depth of 3 m, the top portion of the clay suddenly failed. On investigating, the failure was observed to be a slip plane approximately parallel to the original slope. Clay Y = 17.5 kN/m² 3m 36° The undrained shear strength (in kPa) of the clay will be.arrow_forward
- 1. Determine the gradient of each point from point 1. ( 2540 2540 2290 650-m from point 1-2 850-m from point 1-3 1550-m from point 1-4 Contour map units: meters 2. Given a density of a cubical quart rock to be 2650 kg/m³, determine the lithostatic stress on 800,000 cm³ volume if the acceleration is 980 cm/sec² with a depth of burial to be 6 miles./arrow_forwardAn embankment consists of clay fill for which c′ = 25 kN/m2 and φ = 27° (from consolidated undrained tests with pore-pressure measurement). The average bulk unit-weight of the fill is 2 Mg/m3. Estimate the shear-strength in kPa of the material on a horizontal plane at a point 20 m below the surface of the embankment, if the pore pressure at this point is 180 kN/m2 as shown by a piezometer.arrow_forward3. The following convergence measurements (U) have been made in a 4.6-m-diameter circular vertical shaft in good quality granitic rock mass (Em = 40 GPa, ν = 0.2): θ (deg) U (mm) 0 2.25 45 2.39 90 1.50 135 1.00 a) Derive the equations that relate convergence to in situ stress. b) The angle θ is measured (clockwise) with respect to the x-axis, which is oriented 30 degrees clockwise from True North. What is the orientation of the maximum principal stress with respect to True North?arrow_forward
- 9.10 A continuous foundation on a deposit of sand layer is shown in Figure P9.10 along with the variation of the cone penetration 1.5 m Sand FIGURE P9.10 2.5 m 0 2 ∞ 14 9 = 195 kN/m² I I Depth (m) 9c=1750 9c = 3450 9c = 2900 qe (kN/m²)arrow_forwardFrom the figure shown the soil has a unit weight of 28.5 kN/m^3 and the undrained shear strength cu = 20 kN/m^2. The slope makes an angle 62 degrees with the horizontal. Assume a stability number m = 0.16761. Compute the stability factor. a. 6.78b. 6.7c. 5.99d. 5.012. Compute the maximum depth up to which the cut could be made. a. 5.18 mb. 4.97 mc. 4.20 md. 3.84 m3. Compute angle that the failure plane makes with the horizontal if BC is 9 m. a. 22.32 degreesb. 28.25 degreesc. 21.05 degreesd. 20.15 degreesarrow_forwardwith Diameter of 3 in Cove a and Length of 7 in, with wet weight lbt of 3.44 and porosity of 0.172. Find the Specific Gravity of Solid part of rock. 1 bf = 4.45 N 1 ft = 12 in 1 in = 2.54cmarrow_forward
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