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Verification of Deep Foundations by NDT Methods

by Garland Likins, Pile Dynamics Inc, Cleveland, United States,
Frank Rausche, Pile Dynamics Inc, Cleveland, United States,
Robert Miner, Pile Dynamics Inc, Cleveland, United States,
Mohamad Hussein, Pile Dynamics Inc, Cleveland, United States,



Document Type: Proceeding Paper

Part of: Design and Performance of Deep Foundations: Piles and Piers in Soil and Soft Rock

Abstract:

Deep foundations are designed using static analysis techniques and the soil strength and structural integrity are then confirmed by static load tests. However, static tests are time consuming and expensive. Lower cost alternative dynamic tests include high strain testing with large drop weights to estimate soil strength, and low strain testing with small hand held hammers to evaluate integrity. The authors were requested to demonstrate applicability and reliability of dynamic testing on specially constructed drilled shafts. Only after submitting dynamic results were the as built shapes and static test results revealed, making this a true Class A prediction event.

Subject Headings: Static tests | Dynamic tests | Soil tests | Load tests | Soil strength | Nondestructive tests | Dynamic loads

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