Answered: Define constant-rate-of-penetration…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Define constant-rate-of-penetration test.

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Constant rate-of-penetration test-

It is defined as the method of application of loading in which the test piled is jacked into the soil and the load is adjusted in such a way that it gives a constant rate of downward movement.

Characteristics of Constant rate-of-penetration test-

It helps in determining the safe load of a pile.
In this Maximum skin, friction mobilizes at small penetration of 5 to 10 mm.
In this maximum base, resistance mobilizes at a relatively large penetration.
It helps in verifying the structural soundness of the pile.
It determines the load-settlement curve.

Advantages of Constant rate-of-penetration test-

In Constant rate-of-penetration test curve attain progressive failure.
It is used for finding combined friction resistance.

Disadvantages of Constant rate-of-penetration test-

It is a time taking method.
In this design, resistance is calculated on an allowable basis which is not preferred nowadays.

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