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Foundation Engineering

Effect of Shape and Cohesion

Consider the ...

Question

Consider the following statements: Criteria for satisfactory performance of footings are that the
1. soil supporting the footing must be safe against shear failure
2. footing must not settle more than a pre specified value
3. footing must be rigid
4. footing should be above water table.
Which of these statements are correct?

A

3 and 4

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B

1 and 2

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C

1 and 3

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D

2 and 4

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Solution

The correct option is B 1 and 2
If footing is satisfying shear criteria and settlement criteria then it does not matter if footing is flexible or rigid, below or above the water table.

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Similar questions

Q. Consider the following statements:
1. According to Terzaghi, a foundation is shallow if its depth is equal to or less than its width.
2. Spread footing, strap footing and raft footing are types of shallow foundations.
3. Combined footing may be trapezoidal if the two columns carry unequal loads; and rectangular if both columns carry equal loads.
4. For water tanks, providing raft foundations will avoid unequal settlements.
Which of the above statements are correct?

Q. Which of the following statements are correct about Terzaghi's theory for shallow foundations ?

1. Terzaghi considered footing to be continuous such as strip footing, which makes analysis two dimensional.

2. Terzaghi considered base of the footing to be smooth and ignore side resistance of the footing.

Q. Consider the following statements:
1. The bearing capacity of a footing on clay does not significantly get altered by the presence of water table.
2. The bearing capacity of a footing on saturated clay

(ϕ = 0)

is a function of its size.
Which of these statements is/are correct?

Q. Consider the following statements:
1. In the case of footings on purely cohesive soils, the benefit due to surcharge or depth of foundation is only marginal.
2. The bearing capacity of a footing in pure clay may be increased by increasing its size.
3. Factor of safety should be applied only to the net ultimate bearing capacity.
which of the above statements are correct ?

Q. Consider the following statement
1. The ultimate bearing capacity of a footing on sand increase.
2. The settlement of the footing on sand increases with increase in its width.
Which of the above statements are correct?

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