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ASTM International - ASTM D4945-00

Standard Test Method for High-Strain Dynamic Testing of Piles

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Organization: ASTM International
Publication Date: 10 November 2000
Status: inactive
Page Count: 7
ICS Code (Earthworks. Excavations. Foundation construction. Underground works): 93.020
significance And Use:

This test method is used to provide data on strain or force and acceleration, velocity or displacement of a pile under impact force. The data are used to estimate the bearing capacity and the... View More

scope:

1.1 This test method covers the procedure for testing vertical or batter piles individually to determine the force and velocity response of the pile to an impact force applied axially by a pile driving hammer to the top of the pile. 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.

1.2 This standard does not purport to address all of the safety problems associated with its use. 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 1--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 2--This standard method may be applied for high-strain dynamic testing of piles with the use of only force or strain transducers and/or acceleration, velocity or displacement transducers as long as the test results clearly state how the testing deviates from the standard.

Note 3--A suitable follower may be required for testing cast-in-place concrete piles. This follower should have an impedance within 80 and 150% of that of the pile. However, additional caution and analysis may be required if the impedance is not within 10%. 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.

Document History

November 1, 2017
Standard Test Method for High-Strain Dynamic Testing of Deep Foundations
4.1 This test method obtains the force and velocity induced in a pile during an axial impact event (see Figs. 1 and 2). Force and velocity are typically derived from measured strain and acceleration....
May 1, 2012
Standard Test Method for High-Strain Dynamic Testing of Deep Foundations
Based on the measurements from strain or force, and acceleration, velocity, or displacement transducers, this test method obtains the force and velocity induced in a pile during an axial impact event...
October 1, 2008
Standard Test Method for High-Strain Dynamic Testing of Piles
Based on the measurements from strain or force, and acceleration, velocity, or displacement transducers, this test method obtains the force and velocity induced in a pile during an axial impact event...
ASTM D4945-00
November 10, 2000
Standard Test Method for High-Strain Dynamic Testing of Piles
1.1 This test method covers the procedure for testing vertical or batter piles individually to determine the force and velocity response of the pile to an impact force applied axially by a pile...
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