Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 18.13P
(a)
To determine
Find the ultimate skin resistance
(b)
To determine
Find the ultimate skin resistance
(c)
To determine
Find the ultimate skin
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A group pile in clay is shown in the figure below. Determine the maximum vertical load Qg
be applied if the allowable consolidation settlement of the pile group is set to be 0.17 m. Use the
2:1 stress distribution method to estimate the average effective stress in the clay layer.
can
Qg
3 m
Sand
Groundwater
y = 15.72 kN/m3
table
Sand
3 m
Ysat =
18.55 kN/m3
2.75 m
X 2.75 m
Group
plan
Normally consolidated clay
Ysat = 19.18 kN/m³
15 m
18 m
eo = 1
C.
= 0,8
Normally consolidated clay
Ysat = 19 kN/m3
eo = 0.25, C. =1
5 m
Rock
A 50 cm square precast pile is driven by 9 m into a sandy soil. The standard penetration
test results, prformed on this ground, are given in the table below:
Depth below ground
surface (m)
SPT (Nss)
1.5
3.0 4.5
4
6
6.0
12
12 20 24 35 39
If the skin resistance is equal to {T, = 2 x (average Nss along the pile shaft)) kPa. Compute
the factor of safety available, if 1100 kN of compressive load is applied on this pile.
7.5
9.0 10.5 12.0
Estimate the side resistance Qs by:
a. Using Eqs. (9.40) through (9.42). Use K = 1.5 and 8 = 0.60
b. Coyle and Castello's method [Eq. (9.44)]
20 m
Concrete pile
460 mm x 460 mm
Loose sand
$₁ = 30°
y = 18.6 kN/m³
Dense sand
$2=36
y = 18.5 kN/m³
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
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Refer 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_forward11.10 A concrete pile 0.406 m x 0.406 m in cross section is shown in Figure P11.10. Calculate the ultimate skin friction resistance by using the a. a method b. A method c. ẞ method Use =20° for all clays, which are normally consolidated. 6.1 m 12.2 m 0.406 m Figure P11.10 Groundwater table Ysat Silty clay 18.55 kN/m³ Cu = 35 kN/m² Silty clay Ysat = 19.24 kN/m³ Cu = 75 kN/m²arrow_forward9. The following are the details for the backfill material in a vibroflotation project. D10=0.36 mm D20 0.52 mm D25=0.60 mm D50=1.42 mm D75 1.65 mm a. Find the suitability number. b. Determine the rating. c. Determine the sorting coefficient.arrow_forward
- 8. Plot the consolidation curve for the data given below and determine the preconsolidation stress (o'c). Note: tsf = tons per square foot. tsf e 0.25 0.93 0.5 0.92 0.9 2 0.88 4 0.84 1 8 0.75 16 0.59 32 0.38 4 0.43 1 0.48 9. For the plot in problem 8, determine Cr and Cc.arrow_forwardQ1/ 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_forwardA 50 cm diameter precast pile is driven by 9 m into a sandy soil. The standard penetration test results, prformed on this ground, are given in the table below: Depth below ground surface (m) 3.0 4.5 6.0 7.5 9.0 10.5 12.0 SPT (N55) 6 12 12 20 24 35 39 1.5 4 If the skin resistance is equal to (ts=2 x (average Nss along the pile shaft)} kPa. Compute the number of piles that needed to support a total load of 4400 KN with factor of safety (2.5).arrow_forward
- Determine 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_forwarda. The following are the results of a consolidation test. Pressure o' (kN/m²) 480.. e 1.21 1.195 1.15 1.06 0.98 0.925 25 50 100 200 400 500 1. Plot the e-log o' curve. (use a French curve to construct) 2. Using Casagrande's graphical method, determine the preconsolidation pressure. 3. Calculate the compression index, Cc, from the laboratory e-log o' curve.arrow_forward1. Refer the Fig. 1. Estimate the side resistance Qs by a. Meyerhof's method. K= 1.5 and d'= 0.6 Ø Coyle and Castello's method b. Concrete pile 460 mm x 450 mm I Loose sand 20 m 0', -30° Y=18.6 kN/m³ TE Dense sand 0₂-42* Y-18 6 kN/m² Fig. 1arrow_forward
- 12.2 A 20 m long concrete pile is shown in Figure P12.2. Estimate the ultimate point load Q, by a. Meyerhof's method b. Vesic's method c. Coyle and Castello's method Use m = 600 in Eq. (12.28). Concrete pile 460 mm X 460 mm Loose sand di = 30° y = 18.6 kN/m3 20 m F Dense sand $2 = 42° y = 18.5 kN/marrow_forwardA 20-m-long concrete pile is shown in Figure P9.1. Estimate the ultimate point load Q, by a. Meyerhof's method b. Vesic's method c. Coyle and Castello's method Use m = 600 in Eq. (9.26). 9.1 Concrete pile 460 mm x 460 mm Loose sand di = 30° y = 18.6 kN/m3 20 m Dense sand d'2 = 42° y = 18.5 kN/m3 Figure P9.1arrow_forwardA frictional pile with a circular cross-section (diameter = D) is pushed into the soil to a distance (L) and then it is subjected to an axial force (P) on its top end. Derive a formula to calculate the normal stress in any section x. P L Cross sectionarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage LearningPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning