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
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 5.2P
Repeat Problem 5.1 with the following data: B = 1.5 m, L = 1.5 m, Df = 1 m, H = 0.6 m, ϕ′ = 35°, c′ = 0, and γ = 15 kN/m3. Use FS = 3.
Refer to Figure 5.2 and consider a rectangular foundation. Given: B = 1.5 m, L = 2.5 m, Df = 1.2 m, H = 0.9 m, ϕ′ = 40°, c′ = 0, and γ = 17 kN/m3. Using a factor of safety of 3, determine the gross allowable load the foundation can carry. Use Eq. (5.3).
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
|A rigid shallow foundation 1m x 1m in plan is shown in the following figure. Calculate the elastic
settlement at the center and corner of the foundation.
Ao = 200 kN/m2
1 m
1 m X 1 m
E, (kN/m?)
+ 8000
Hy = 0.3
+ 6000
3
10,000
Rock
(m).
A continuous foundation is shown in Figure is to be constructed on a sand deposit. If the load
eccentricity is 0.2 m, determine the ultimate load, Qu, per unit length of the foundation. Use
Meyerhof's effective area method.
1.5.m
-2 m
Sand
$' = 40°
-0
y=16.5 kN/m³
The longitudinal foundation is located on the ground as shown in Figure 1. The foundation is
located on the ground with 2 layers of soil. Soil data as follows:
a. land 1: y1 = 19 kN/m3, c1 = 20 kN/m2 , p1 = 25°
b. land 2: y2 = 19,5 kN/m3. c2 = 50 kN/m2 , Q2 = 30°
If the depth of the foundation is 1 m, the width of the foundation is 2 m and a general shear
failure is considered, determine the maximum allowable foundation load based on the
Terzaghi bearing capacity formula, with a safety factor of 3!
Layer 1
Layer 2
Figure 1
Chapter 5 Solutions
Principles of Foundation Engineering (MindTap Course List)
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
- Please solve under Geotechnology II.arrow_forwardA square column foundation has to carry a gross allowable load of 1805 kN ( FS = 3). Given: D f = 1.5 m, γ = 15.9 kN/m 3 , ϕ ′ = 34 ° , and c ′ = 0. Use Terzaghi's equation to determine the size of the foundation ( B ). The applied load on a shallow square foundation makes an angle of 15° with the vertical.arrow_forward. A square footing is shown is the following figure. Assume the induced stress, Ao,, due to load from foundation is linearly distributed along the depth, as shown in the figure. Ignore the deformation of hard rock. Using the classical method, compute its settlement. S, = 140kPa C/(1+e) 0.12 C, / (1+e) = 0.02 2m Aơ, = 150kPa O'= 200kPa y = 18kN/m Silty clay Ao, = 70kPa Hard rock 1.0m 1.5marrow_forward
- A square foundation is shown in Figure P6.19. Use FS = 6,and determine the size of the foundation. Use Prakash and Saran's method [Eq. (6.59)].arrow_forwardProb. 3): A square shallow foundation is shown below. If the load eccentricity is 0.3 m, determine the maximúm allowable load that the foundation can carry. Use Mayerhof's method, and FS as 4. (Eccentricity in one direction only) e = 0.3 m Qal Y = 16.3 kN/m3 c' = 20 kN/m? p'=28° 1.0 m 1.5 m X 1.5 m Centerlinearrow_forwardConsider a continuous foundation of width B = 1.4 m on a sand deposit with c' = 0, Φ' = 38° and γ = 17.5 kN/m3. The foundation is subjected to an eccentrically inclined load (see Figure 4.31). Given: load eccentricity e = 0.15 m, Df = 1 m, and load inclination β = 18°. Estimate the failure load Qu(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (4.85)] b. for a reinforced type of loading [Eq. (4.86)]arrow_forward
- A circular foundation having qo=720 kPa and radius of 2m is placed on a soil section as shown in figure (1), if the ground water level was located at N.G.S, for the soil element (A) which located under the center of the foundation at the middle of clay layer. Calculate the followings: Sandy soil Ysa19.74 kN/m³ eo = 0.54 Clayey soil Ysa19.18 kN/m³ e =0.8 Calculate the Effective stress Choose... + at soil element (A) in (kPa) The increase in stress (kPa) due to footing load (Use Choose... + Approximated method) at soil element (A) 7marrow_forwardA square column foundation is to be constructed on a sand deposit (C = 0). The allowable load Q will be inclined at an angle b Ø = 20° with the vertical. Knowing that y = 16.5 KN/ m3 and Df = 1 m. The standard Penetration numbers N60 obtained from the field are as follows. Determine value of Q ? Depth (m) N60 1.5 3 3.0 6 4.5 6.0 10 7.5 10 B- 1.25 m- Select one: a. 110 KN O b. 151.7 KN c. 95 KN d. 155.3 KNarrow_forwardA square foundation is shown in Figure P4.12. Use FS = 6, and determine the size of the foundation. Use Prakash and Saran theory [Eq. (4.55)].arrow_forward
- Situation 4. See figure GEOD 24.0. A soil formation is composed of 5 m thick clay and 5 m thick clayand 5 m thick sand being the sand above the clay. The ground water table (GWT) is located at 2 m below the ground surface. Assume E= 6900 kPa, IF = 0.79 and μ= 0.2. ➤ A rigid column footing 1.2 m in diameter is constructed. The load on the footings is 170 kN. Determine the immediate settlement. > Calculate the primary compression index. 40 kPa 2 m Sand 3 m Sand 5 m Clay Ydry17.66 kN/m^3 VGWT Ysat 20.93 kN/m^3 eo = 0.60 Gs = 2.60 LI = 64% PL = 20% W = 40% Fig. GEOD 24.0arrow_forwardExample 5.7 Consider a rectangular foundation 2 mx 4 m in plan at a depth of 1.2 m in a sand deposit, as shown in Figure 5.23a. Given: y = 17.5 kN/m³; ā = 145 kN/m², and the following approximated variation of qc with z: 1.2 m q=145 kN/m² ++++y=17.5 kN/m³ z (m) 9c (kN/m²) B=2m- 0-0.5 2250 L=4 m 0.5-2.5 3430 2.5-5.0 2950 Estimate the elastic settlement of the foundation using the strain influence factor method.arrow_forwardA continuous foundation with a width of 1 m is located on a slope made of clay soil. Refer to Figure 5.19 and let Df = 1 m, H = 4 m, b = 2 m, γ = 16.8 kN/m3, c = cu = 68 kN/m2, Φ= 0, and β = 60°.a. Determine the allowable bearing capacity of the foundation. Let FS = 3.b. Plot a graph of the ultimate bearing capacity qu if b is changed from 0 to 6 m.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Structural Analysis (10th Edition)Civil EngineeringISBN:9780134610672Author:Russell C. HibbelerPublisher:PEARSON
Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Structural AnalysisCivil EngineeringISBN:9780073398006Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel LanningPublisher:McGraw-Hill Education
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:9780134610672
Author:Russell C. Hibbeler
Publisher:PEARSON
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:9780073398006
Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning
CE 414 Lecture 02: LRFD Load Combinations (2021.01.22); Author: Gregory Michaelson;https://www.youtube.com/watch?v=6npEyQ-2T5w;License: Standard Youtube License