ASTM_D_8381_-_D_8381M_-_21.pdf

Designation:D8381/D8381M21Standard Test Methods forMeasuring the Depth of Deep Foundations by ParallelSeismic Logging1This standard is issued under the fixed designation D8381/D8381M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The test Methods described in this standard are used tomeasure the depth of vertical deep foundation elements includ-ing micropiles,driven piles(prefabricated or cast in-situ),bored piles,secant or tangent pile walls,caissons,barrettes,diaphragm walls and sheet pile walls.It is applicable where thetop of the said foundation element(in the following also named“pile”)cannot be exposed for testing and other testing methodssuch as ASTM D5882 or D6760 cannot be used.1.2 This standard provides minimum requirements for mea-suring the depth of deep foundations.Plans,specifications,and/or provisions may provide additional requirements andmethods as needed to satisfy the objectives of a particular testprogram.1.3 This standard provides the following test methods:1.3.1 Method“A”using a vertical access tube adjacent tothe deep foundation.1.3.2 Method“B”using a seismic cone inserted into theground adjacent to the deep foundation.1.4 Apparati and Methods herein designated“optional”mayproduce different a different kind of test results or additionalinformation and may be used only when approved by theengineer responsible for the test.1.5 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.6 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.7 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.8 The methods used to specify how data are collected,recorded and calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that should generally be retained.The meth-ods used do not consider material variation,purpose forobtaining the data,special-purpose studies or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analysis.1.9 This standard offers an organized collection of informa-tion or a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this standard may be applicableunder all circumstances.This ASTM standard is not intendedto represent or replace the standard of care by which theadequacy of a given professional service must be judged,norshould this document be applied without consideration of aprojects many unique aspects.The word“Standard”in the titleof this document only means that the document has beenapproved through the ASTM consensus process.1.10 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.11 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.1These test methods are under the jurisdiction ofASTM Committee D18 on Soiland Rock and are the direct responsibility of Subcommittee D18.11 on DeepFoundations.Current edition approved Nov.1,2021.Published November 2021.DOI:10.1520/D8381_D8381M-21Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.12.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requiremen