Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.2P
A 1500 kN load was applied on two 20 m long and 500 mm diameter driven piles that were instrumented for measuring the load variation with depth.
- a. The variation of frictional resistance per unit area f(z) with depth for the first pile is shown Figure 18.33a. Draw the variation of pile load Q(z) with depth.
- b. The variation of pile load Q(z) with depth for the second pile is shown Figure 18.33b. Draw the variation of frictional resistance per unit area f(z) with depth.
FIG. 18.33
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3. Determine the maximum load that can be allowed on a 45cm x 45cm diameter bored pile
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Figure - 1
2.
Consider a group of 450 mm x 450 mm reinforced concrete piles were driven into
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below the ground surface. Use 8 = 0.80 and K = 1.5Ko.
3B
3B
3B
1
3
3.5B
b
'P
9.
10
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3.5B
2
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1.5B
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1.5B
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Figure Q2
Figure below shows a precast circular pile is driven into two clay stratums to a
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Figure
at Om c= 30 kN/m²
at 12m → cu = 30 kN/m²
at 20m cu = 75 kN/m²
Chapter 18 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 18 - State whether the following are true or false. a....Ch. 18 - A 1500 kN load was applied on two 20 m long and...Ch. 18 - A 500 mm diameter and 20 m long concrete pile is...Ch. 18 - A 400-mm diameter and 15 m long concrete pile is...Ch. 18 - A 400 mm 400 mm square precast concrete pile of...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.10P
Ch. 18 - Redo Problem 18.10 using the method for...Ch. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.13PCh. 18 - A steel pile (H-section; HP 360 1.491; see Table...Ch. 18 - A concrete pile is 18 m long and has a cross...Ch. 18 - Prob. 18.16PCh. 18 - Prob. 18.17PCh. 18 - Prob. 18.18PCh. 18 - Prob. 18.19PCh. 18 - Figure 18.26a shows a pile. Let L = 20 m, D = 450...Ch. 18 - Refer to Figure 18.26b. Let L = 15.24 m, fill =...Ch. 18 - Prob. 18.22PCh. 18 - Figure 18.39 shows a 3 5 pile group consisting of...Ch. 18 - The section of a 4 4 group pile in a layered...Ch. 18 - Prob. 18.25PCh. 18 - Prob. 18.26CTP
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- Answer both partsarrow_forwardFigure 18.26a shows a pile. Let L = 20 m, D = 450 mm. Hf = 4m, f = 17.5 kN/m3, fill = 25. Determine the total downward drag force on the pile. Assume that the fill is located above the water table and that = 0.5 fill. FIG. 18.26 Negative skin frictionarrow_forwardDetermine the maximum load that can be allowed on a 450 mm diameter driven pile shown in Figure P12.6, allowing a factor of safety of 3. Use K = 1.5 Ko and = 0.65 in computing the shaft load. Use Meyerhofs method for computing the point load.arrow_forward
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- A concrete bored pile has a diameter of 800 mm as given in the figure below. Calculate the ultimate load carrying capacity of the pile. -0.8- Clay Cu = 60 kN/m² Y = 18 kN/m³ %3D 4m G.W.T Sand 6m $ = 30° Y = 20 kN/m³ Clay Cu = 100 kN/m² Y = 20 kN/m³ 5marrow_forwardc. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pile is fully embedded in sand, for which the unit weight y =18 kN/m³ and the frictional angle o = 30°. i. Calculate the ultimate point load Qp. ii. Determine the total frictional resistance Qs. iii. Determine the total ultimate load of the pile.arrow_forwardA 15 m long steel pipe pile of cross section of 0.6 m outside diameter is driven into a sand deposit. The pile penetration depth in sand deposit is 12 m. The pile is subjected to a lateral load of 45 kN at a height 3 m above the ground level. Known the information in the figure below, calculate the pile lateral deflection at the ground level (z = 0) and the pile bending moments at the depth of 1 m and 2 m below the ground level. Use the elastic solution method. Lateral Load Q = 45 kN 3.0 m z = 0 Ground Level Sand layer n = 10.5x103 kN/m³ 12.0 m Steel pipe pile E, = 20.0x10* MPa 4 = 1.0614x10-3 marrow_forward
- A rectangular pile (0.5mx0.83m) is driven in a clayey soil arrangement composed of two different layers. The first layer has a height of 5m, cohesion of 58 kPa, friction factor of 0.84. Second layer has a height of 8m, cohesion of 76 kPa, and friction factor of 0.84. Compute the allowable load that the pile can carry if the factor it safety is 2.79.arrow_forwardQUESTION 3: Three forces act on a pile as shown. If the resultant of the three forces is equal to 500 N and is directed vertically, what is the magnitude and direction of F3. F2= 100 N F3 F,= 75 N 35° 40° Pile (Answer: F3=365 N, E=76.8°)arrow_forwardFind the maximum pile capacity for the pile group shown in figure below. If My = 500 kN.m and V = 7200 kN. 'My X=1.4 - x=1.4- y=1.2 y=1.2arrow_forward
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