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 18.16P
To determine
Find the allowable load
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A driven closed-ended pile, circular in cross section, is shown in Figure 1. Calculate the following.
a. The ultimate point load using Meyerhof’s procedure.
b. The ultimate point load using Vesic’s procedure. Take Irr = 50.
A 10m long and 0.8m diameter precast concrete pile is driven into a saturated clay deposit
as shown in the figure below. The groundwater table is at the ground surface. For the ratio
of the undrained shear strength to vertical effective pressure is approximated as follows:
= 0.11 + 0.0037(PI)
NC
(9- 9
(OCR)8
OC
Determine the bearing capacity for the pile by the
a) Alpha (a) method.
b) Lambda (A) method
Depth, m
Layer 1
OCR = 5, Yat = 19.5 kN/m³, Pl = 35
Layer 2
OCR = 1.5, %at = 19.0 kN/m, Pl = 25
Layer 3
OCR = 8, %at = 19.5 kN/m, Pl = 20
10
D, = 0.8 m
D 10 m
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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- [Geotechnical design] Please finish the answer step by step and clear to see. Thank you!arrow_forwardFor the (4 x 4) pile group as shown in the figure, the settlement of pile group, in a normally consolidated clay stratum having properties as shown in the figure will be (Load dispersion = 2 H:1 V) mm. 900 kN G Normally consolidated clay Yat = 20 kN/m 6 m w̟ = 40% 8 m w, = 25% e, = 1.05 Hard stratum 250 mm Piles are spaced at 0.5 m c/c. Diameter of piles is 250 mm 0.5 m 0.5 m Top viewarrow_forwardd. Starting out from the condition where the water table is above the excavation line on both sides of the sheet pile, if we pumped the water out...but only on the excavation side (see figure below), would you expect the moment induced in the sheet pile to increase or decrease? Consider short-term, immediate effects only. Explain your answer. y (pcf) H (ft) Ysat (pcf)arrow_forward
- A driven closed-ended pile, circular in cross section, is shown in Figure P 9.4.Calculate the following.a. The ultimate point load using Meyerhof’s procedure.b. The ultimate point load using Vesic’s procedure. Take Irr = 50.c. An approximate ultimate point load on the basis of parts (a) and (b).d. The ultimate frictional resistance Qs. [Use Eqs. (9.40 (L' ≈ 15 D)) through (9.42), and take K = 1.4 and ẟ' = 0.6 Φ'.]e. The allowable load of the pile (use FS = 4).arrow_forwardDetermine the primary consolidation settlement for the 20 m long pile group shown below. Soil properties by layer are given in the figure, and the clay layers are normally consolidated. Assume a 2:1 load spread starting at a depth of 2/3 of the embedment depth, L. The pile group is square and has dimensions 2.6 m by 2.6 m in plan view. The groundwater table is 1 m below the ground surface. = 4000 kN 1 m Sandy soil Y =18.5 kN/m³ Q'=330 V W.T. 7 m -Group.. piles Clay 1 Y =17.2 kN/m3 e=0.83 C= 0.23 L= 20 m Ax B = 2.6 m x 14 m 2.6 m Clay 2 Y =17.5 kN/m3 e,=0.78 C=0.22. 8 m Clay 3 Y =18.0 kN/m? eo=0.76 C=0.20 12 m Rockarrow_forwardI need detailed help solving the problem 12.13 about skin friction resistance, please.arrow_forward
- Q1/ For the footing shown in Figure (1), estimate the pile group capacity. 0.6m dia bored pile Clay c=80 kN/m² y-17kN/m² S=1.5 m T L=12 marrow_forwardFor the (3×3) pile group shown in the figure,the settlement of the pile group,in a normally consolidated clay stratum having properties as shown in the figure,will bearrow_forwardConcrete pile 356mm x 356mm Loose sand 1-30° 7-17.5kN/m 12 m Dense sand =42 0 y-18.5 kN/m A square concrete pile12m long is shown in Figure. Estimate the following: Ultimate shaft carrying capacity by Meyerhof's Method 471 kN 784.6 kN O 319.5kN 576.5 kN O 141.7 kNarrow_forward
- Find 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_forwardA 20 m long concrete pile is shown in Figure P12.2. Estimate the ultimate point load Qp by a. Meyerhofs method b. Vesics method c. Coyle and Castellos method Use m = 600 in Eq. (12.28).arrow_forwardRefer to Figure 18.26b. Let L = 15.24 m, fill = 17.29 kN/m3, sat(clay) = 19.49 kN/m3, clay = 20, Hf = 3.05 m, and D = 0.406 m. The water table coincides with the top of the clay layer. Determine the total downward drag on the pile. Assume that = 0.6 clay. FIG. 18.26 Negative skin frictionarrow_forward
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