ASTM D4945 PDF

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Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard.

More D This test method is applicable to deep foundation units that function in a manner similar to foundation piles, regardless of their method of installation provided that they are receptive to high strain impact testing.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement, see Note 5.

Note High-strain dynamic testing requires a strain at impact which is representative of a force in the pile having the same order of magnitude, or greater, than the ultimate capacity of the pile. Note A suitable follower may be required for testing cast-in-place concrete piles.

For mandrel driven piles, the mandrel may be instrumented in a similar way to a driven pile provided that the mandrel is constructed of a single member with no joints. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Scope 1. Link to Active This link will always route to the current Active version of the standard.

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Standard Test Method for High-Strain Dynamic Testing of Deep Foundations

Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More D Force and velocity are typically derived from measured strain and acceleration. The Engineer may analyze the acquired data using engineering principles and judgment to evaluate the integrity of the pile, the performance of the impact system, and the maximum compressive and tensile stresses occurring in the pile. Factors that may affect the axial static capacity estimated from dynamic tests include, but are not limited to the:. The Engineer should determine how the size and shape of the pile, and the properties of the soil or rock beneath and adjacent to the pile, affect the amount of movement required to fully mobilize the static capacity.

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Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard. More D Plans, specifications, or provisions or combinations thereof prepared by a qualified engineer may provide additional requirements and procedures as needed to satisfy the objectives of a particular test program.

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