Concept explainers
For the following cases, determine the allowable gross vertical load-bearing capacity of the foundation. Use Terzaghi’s equation and assume general shear failure in soil. Use FS = 4.
Parameters for Problem 6.1
a)
Find the allowable gross vertical load-bearing capacity of the continuous foundation.
Answer to Problem 6.1P
The allowable gross vertical load-bearing capacity of the continuous foundation is
Explanation of Solution
Given information;
The width (B) of the foundation is 3 ft.
The depth
The angle of friction
The cohesion
The specific weight
The factor of safety is (FS) is 4.0.
Calculation:
Refer Table (6.1), “Terzaghi’s bearing capacity factors” in the text book.
For
Take the value of
Take the value of
Take the value of
Determine the ultimate load bearing capacity
Determine the allowable gross vertical load-bearing capacity
Hence, the allowable gross vertical load-bearing capacity
b)
Find the allowable gross vertical load-bearing capacity of the continuous foundation.
Answer to Problem 6.1P
The allowable gross vertical load-bearing capacity of the continuous foundation is
Explanation of Solution
Given information;
The width (B) of the foundation is 1.5 m.
The depth
The angle of friction
The cohesion
The specific weight
The factor of safety is (FS) is 4.0.
Calculation:
Refer Table (6.1), “Terzaghi’s bearing capacity factors” in the text book.
For
Take the value of
Take the value of
Take the value of
Determine the ultimate load bearing capacity
Determine the allowable gross vertical load-bearing capacity
Hence, the allowable gross vertical load-bearing capacity
c)
Find the allowable gross vertical load-bearing capacity of the square foundation.
Answer to Problem 6.1P
The allowable gross vertical load-bearing capacity of the square foundation is
Explanation of Solution
Given information;
The width (B) of the foundation is 3.0 m.
The depth
The angle of friction
The cohesion
The specific weight
The factor of safety is (FS) is 4.0.
Calculation:
Refer Table (6.1), “Terzaghi’s bearing capacity factors” in the text book.
For
Take the value of
Take the value of
Take the value of
Determine the ultimate load bearing capacity
Determine the allowable gross vertical load-bearing capacity
Hence, the allowable gross vertical load-bearing capacity
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Chapter 6 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- Consider a continuous foundation of width B = 1.4 m on a sand deposit with c = 0, = 38, and = 17.5 kN/m3. The foundation is subjected to an eccentrically inclined load (see Figure 6.33). Given: load eccentricity e = 0.15 m, Df = 1 m, and load inclination = 18. Estimate the failure load Qu(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (6.89)] b. for a reinforced type of loading [Eq. (6.90)]arrow_forwardThe foundation of the figure presents an eccentricity that goes in 2 directions, eb= 0.20, eL=0.35. Using the general Meyerhof bearing capacity equation and FS= 1.5, determine Qu(adm) that the foundation can support.arrow_forwardA continuous foundation is shown in Figure 6.24. 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. Solve this using attached equationarrow_forward
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