Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN: 9781305081550
Author: Braja M. Das
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 8, Problem 8.1P
To determine
Find the net ultimate bearing capacity value for the given properties of mat foundation.
Expert Solution & Answer
Answer to Problem 8.1P
The value of net ultimate bearing capacity is
Explanation of Solution
Given information:
The depth of the foundation
The length of the foundation
The width of the foundation
The coefficient of friction
The angle of friction
Calculation:
Find the net ultimate bearing capacity of mat foundation
Therefore, the value of net ultimate bearing capacity is
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Problem.№₂3 -
The plan of a mat foundation is shown in Figure. Calculate the soil pressure at points A, B, C,
D, E, and F. (Note: All column sections are planned to be 0.5 m 3 0.5 m.) All loads shown are
factored loads according to ACI 381-11 (2011).
550 KN
2000 KN
5.25 m
2000 KN
550 kN
F
*K
0.25 m
G
H
10 m
! B
i 660 kN
2000 KN
10 m
2000 KN
660 kN
E
600 KN
1600 KN
5.25 m
10 m
1600 KN
470 kN
C
D
*K
0.25 m
9 m
9 m
9 m
0.25 m
0.25 m
EXAMPLE-H.W.
For the foundation shown in the below; estimate quantity of Reinforcement.
Depth of foundation = 1.00 m,
5
0.5 m
16db
0 100 150
60db
20@200
Q1: determine the increase in vertical stresses at depth of Z=3.5 m under points A, B and C due
to apply rectangular and ring foundations. The surface load intensity of rectangular is 250 kN/m²,
while the surface load intensity of ring is 300 kN/m².The drawing was done without scale and all
dimensions in (m).
R1
R2
X1
X2
В
L
3
4.5
7.5
6.
12
X1
X2
Aqs-net(2)
R1
Aqs-net(1)
R2
Chapter 8 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 8 - Prob. 8.1PCh. 8 - Following are the results of a standard...Ch. 8 - Repeat Problem 8.2 for an allowable settlement of...Ch. 8 - Prob. 8.6PCh. 8 - Prob. 8.7PCh. 8 - From the plate load test (plate dimensions 1 ft ×...Ch. 8 - Refer to Problem 8.8. If the full-sized foundation...Ch. 8 - The subgrade reaction of a sandy soil obtained...
Knowledge Booster
Similar questions
- Refer to Figure 5.2. Given: B = L = 1.75 m, Df = 1 m, H = 1.75 m, = 17 kN/m3, c = 0, and = 30. Using Eq. (5.6) and FS = 4, determine the gross allowable load the foundation can carry.arrow_forwardThe type of foundation classified based on a. Length / Breadth Ratio b. Depth / Breadth Ratio O . Breadth / Depth Ratio d. Depth / Length Ratioarrow_forwardA column load of 72 kips is applied to the 6 ft by 8 ft rectangular concrete footing shown below. The groundwater table is 2 ft deep. The soil profile and properties are shown below. The required minimum factor of safety against bearing capacity failure is 2.5. Is the current foundation design acceptable? Use Vesic’s bearing capacity formula 1a. Intermediate calculation: compute the ultimate bearing capacity, qult, in units of psf. 1b. Intermediate calculation: compute the applied bearing pressure, q, in units of psf. 1c. Final calculation: compute the factor of safety (FS) against bearing capacity failure.arrow_forward
- o T ☺ ť Q2: A ring foundation having load equal to 400kPa is resting on a saturated clay soil layer, the groundwater level is at the natural ground surface. The outer diameter of the foundation ring is 8m. Find the inner radius of the ring foundation if the total stress at a point located 4m beneath the center of the ring foundation equal to 251kPa, knowing that the saturated unit weight of the clay is 16kN/m'. (Use the below formula) Solution:- Aoz = q مر ر ل لأعلى لاستعراض الفلاتر إضافة شرح.. . mum <arrow_forwardCalculate the gross allowable bearing capacity (qall) for the foundation shown below Given: H = 5 ft B = 8 ft γ = 100 lb/ft3 c’ = 0 psf φ = 32° FS = 3.0arrow_forwardAn eccentrically loaded continuous foundation is shown in figure below. Determine the ultimate load Qu per unit length that the foundation can carry. 2 ft y- 105 Ib/ft Groundwater table 4 ft 118 Ivft Yat e'-0 4' - 35° 2 ft -5 tarrow_forward
- A square column foundation has to carry a gross allowable load of 1805 kN (FS = 3). Given: Df = 1.5 m, =15.9 kN/m3, = 34, and c = 0. Use Terzaghis equation to determine the size of the foundation (B). Assume general shear failure.arrow_forwardA piece of engineering equipment is supported by the foundation shown. The diameter of the circular pin is 20 mm. a.) Determine the value of P so as not to exceed the allowable bearing stress of 310.5 Mpa in the circular pin. b.) Determine the value of P so as not to exceed the allowable shearing stress of 138 Mpa in the circular pin.arrow_forwardA piece of engineering equipment is supported by the foundation shown. The diameter of the circular pin is 20 mm. a.) Determine the value of P so as not to exceed the allowable bearing stress of 310.5 Mpa in the circular pin.b.) Determine the value of P so as not to exceed the allowable shearing stress of 138 Mpa in the circular pin.arrow_forward
- Part 2: Initial ULS design On the basis of the bearing capacity equation, determine the necessary width of the foundations assuming they are square and assuming an embedment depth of 1 m. The strength parameters are to be factored such that ones used (the design parameters) are: tan(d) tan(p,k/1.25) Su,d = Suk/1.4 where Op,k is the peak friction angle determined from the data in Appendix 1 and su,k is the undrained shear strength determined from the data in Appendix 2. = Both foundations may be assumed to rest on soil layers (sand or clay respectively) that are infinitely deep. Discuss the validity of this assumption for Foundation 2 in light of the foundation dimensions. Comment on the use of peak, rather than constant-volume, friction angle in ultimate limit state design.arrow_forwardFor the strip footing shown in the figure below. Calculate ney allowable bearing capacity of the foundation shown in the figure below Note: The foundation is strip footing with width of 4m. Assume a factor of safety = 3.0arrow_forward2. A square foundation mat supports the four columns shown. Determine the magnitude and point of application of the resultant of the loads. (R=?, x=? & z=?) 40 kips 12 kips 20 kips 8 kips C 5 ft 4 ft- 5 ft 6 ft. Barrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781305081550Author:Braja M. DasPublisher:Cengage LearningPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781305081550
Author:Braja M. Das
Publisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning