Following is the variation of N60 with depth in a granular soil deposit. A concrete pile 9 m long (0.305 m X 0.305 m in cross section) is driven into the sand and fully embedded in the sand.
Following is the variation of N60 with depth in a granular soil deposit. A concrete pile 9 m long (0.305 m X 0.305 m in cross section) is driven into the sand and fully embedded in the sand.
Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter9: Pile Foundations
Section: Chapter Questions
Problem 9.6P
Related questions
Question
Following is the variation of with depth in a granular soil deposit. A concrete
pile 9 m long ( in cross section) is driven into the sand and
fully embedded in the sand.
![b. Coyle and Castello's method [Eq. (11.44)]
11.3 Based on the results of Problems 11.1 and 11.2, recommend an allowable load for
the pile. Use FS = 4.
11.4 A driven closed-ended pile, circular in cross section, is shown in Figure P11.4.
Calculate the following.
a. The ultimate point load using Meyerhof's procedure.
b. The ultimate point load using Vesic's procedure. Take I, = 50.
c. An approximate ultimate point load on the basis of parts (a) and (b).
d. The ultimate frictional resistance Q,. [Use Eqs. (11.40) through (11.42), and
take K = 1.4 and 8' = 0.64'.]
e. The allowable load of the pile (use FS = 4).
11.5 Following is the variation of Ng0 with depth in a granular soil deposit. A concrete
pile 9 m long (0.305 m × 0.305 m in cross section) is driven into the sand and
fully embedded in the sand.
630 Chapter 11: Pile Foundations
Concrete pile
356 mm X 356 mm
Loose sand
di = 30°
y = 17.5 kN/m³
12 m
Dense sand
4 = 42°
y = 18.5 kN/m³
Figure P11.1
Y = 15.72 kN/m³
d' = 32°
c' = 0
3.05 m
Groundwater
-táble -:
Ysat = 18.24 kN/m³
d' = 32°
3.05 m
c'
Ysat = 19.24 kN/m3
d' = 40°
15.24 m
c' = 0
15 in.
Figure P11.4
Depth (m)
Neo
1.5
4
3.0
8
4.5
7
6.0
7.5
16
9.0
18
10.5
21
11.0
24
12.5
20
14.0
19
Problems 631
Silty clay
Ysat = 18.55 kN/m³
C„ = 35 kN/m²
6.1 m
Groundwater
table
Silty clay](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0ea190de-d343-4217-ba6d-c426ddf9b9c3%2F23f3a4be-82de-47ae-853c-7fa34c62af61%2Fkf3kq1k_processed.jpeg&w=3840&q=75)
Transcribed Image Text:b. Coyle and Castello's method [Eq. (11.44)]
11.3 Based on the results of Problems 11.1 and 11.2, recommend an allowable load for
the pile. Use FS = 4.
11.4 A driven closed-ended pile, circular in cross section, is shown in Figure P11.4.
Calculate the following.
a. The ultimate point load using Meyerhof's procedure.
b. The ultimate point load using Vesic's procedure. Take I, = 50.
c. An approximate ultimate point load on the basis of parts (a) and (b).
d. The ultimate frictional resistance Q,. [Use Eqs. (11.40) through (11.42), and
take K = 1.4 and 8' = 0.64'.]
e. The allowable load of the pile (use FS = 4).
11.5 Following is the variation of Ng0 with depth in a granular soil deposit. A concrete
pile 9 m long (0.305 m × 0.305 m in cross section) is driven into the sand and
fully embedded in the sand.
630 Chapter 11: Pile Foundations
Concrete pile
356 mm X 356 mm
Loose sand
di = 30°
y = 17.5 kN/m³
12 m
Dense sand
4 = 42°
y = 18.5 kN/m³
Figure P11.1
Y = 15.72 kN/m³
d' = 32°
c' = 0
3.05 m
Groundwater
-táble -:
Ysat = 18.24 kN/m³
d' = 32°
3.05 m
c'
Ysat = 19.24 kN/m3
d' = 40°
15.24 m
c' = 0
15 in.
Figure P11.4
Depth (m)
Neo
1.5
4
3.0
8
4.5
7
6.0
7.5
16
9.0
18
10.5
21
11.0
24
12.5
20
14.0
19
Problems 631
Silty clay
Ysat = 18.55 kN/m³
C„ = 35 kN/m²
6.1 m
Groundwater
table
Silty clay
![4G+
17:49 P
12 m
y = 17.5 kN/m³
Principles_of_Found..
Dense sand
4½ = 42°
y = 18.5 kN/m³
Figure P11.1
Y = 15.72 kN/m³
= 32°
c' = 0
3.05 m
▼ Groundwater
- táblė -:
Ysat = 18.24 kN/m³
d' = 32°
c' = 0
3.05 m
Ysat = 19.24 kN/m³
d' = 40°
15.24 m
c' = 0
15 in.
Figure P11.4
Depth (m)
Ngo
1.5
4
3.0
8.
4.5
7
6.0
7.5
16
9.0
18
10.5
21
11.0
24
12.5
20
14.0
19
Problems 631
Silty clay
Ysat = 18.55 kN/m³
C, = 35 kN/m²
6.1 m
Groundwater
table
Silty clay
Ysat = 19.24 kN/m³
Cu = 75 kN/m?
12.2 m
406 mm
Figure P11.10
Estimate the allowable load-carrying capacity of the pile (Qa). Use FS = 4 and
Meyerhof's equations [Eqs. (11.37) and (11.45)].
11.6 Solve Problem 11.5 using the equation of Briaud et al. [Eqs. (11.38) and (11.47)].
11.7 A concrete pile 15.24 m long having a cross section of 406 mm × 406 mm is
fully embedded in a saturated clay layer for which y sat = 19.02 kN/m³, ø = 0,
and c, = 76.7 kN/m². Determine the allowable load that the pile can carry. (Let FS
= 3.) Use the a method to estimate the skin friction and Veric's method for point
load estimation.
11.8 Redo Problem 11.7 using the A method for estimating the skin friction and
Calculate the ultimate skin friction resistance by using the
a. a method
b. A method
c. B method
Use o'g = 20° for all clays, which are normally consolidated.
11.11 A steel pile (H-section; HP 360 × 152; see Table 11.1) is driven into a layer of
condstone The langth of the nile is 18 0 m Follouing ore +he pronorties of the](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0ea190de-d343-4217-ba6d-c426ddf9b9c3%2F23f3a4be-82de-47ae-853c-7fa34c62af61%2Fx5uiym7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4G+
17:49 P
12 m
y = 17.5 kN/m³
Principles_of_Found..
Dense sand
4½ = 42°
y = 18.5 kN/m³
Figure P11.1
Y = 15.72 kN/m³
= 32°
c' = 0
3.05 m
▼ Groundwater
- táblė -:
Ysat = 18.24 kN/m³
d' = 32°
c' = 0
3.05 m
Ysat = 19.24 kN/m³
d' = 40°
15.24 m
c' = 0
15 in.
Figure P11.4
Depth (m)
Ngo
1.5
4
3.0
8.
4.5
7
6.0
7.5
16
9.0
18
10.5
21
11.0
24
12.5
20
14.0
19
Problems 631
Silty clay
Ysat = 18.55 kN/m³
C, = 35 kN/m²
6.1 m
Groundwater
table
Silty clay
Ysat = 19.24 kN/m³
Cu = 75 kN/m?
12.2 m
406 mm
Figure P11.10
Estimate the allowable load-carrying capacity of the pile (Qa). Use FS = 4 and
Meyerhof's equations [Eqs. (11.37) and (11.45)].
11.6 Solve Problem 11.5 using the equation of Briaud et al. [Eqs. (11.38) and (11.47)].
11.7 A concrete pile 15.24 m long having a cross section of 406 mm × 406 mm is
fully embedded in a saturated clay layer for which y sat = 19.02 kN/m³, ø = 0,
and c, = 76.7 kN/m². Determine the allowable load that the pile can carry. (Let FS
= 3.) Use the a method to estimate the skin friction and Veric's method for point
load estimation.
11.8 Redo Problem 11.7 using the A method for estimating the skin friction and
Calculate the ultimate skin friction resistance by using the
a. a method
b. A method
c. B method
Use o'g = 20° for all clays, which are normally consolidated.
11.11 A steel pile (H-section; HP 360 × 152; see Table 11.1) is driven into a layer of
condstone The langth of the nile is 18 0 m Follouing ore +he pronorties of the
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