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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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C469 Test Method for Static Modulus of Elasticity and Poissons Ratio of Concrete in Compression
D198 Test Methods of Static Tests of Lumber in Structural Sizes
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D1143/D1143M Test Methods for Deep Foundations Under Static Axial Compressive Load
D3689 Test Methods for Deep Foundations Under Static Axial Tensile Load
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction
D6026 Practice for Using Significant Digits in Geotechnical Data
ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works)
UNSPSC Code 81101514(Geotechnical or geoseismic engineering)
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ASTM D4945-00, Standard Test Method for High-Strain Dynamic Testing of Piles, ASTM International, West Conshohocken, PA, 2000, www.astm.orgBack to Top