ASTM_D_5780_-_18.pdf

Designation:D578018Standard Test Methods forIndividual Piles in Permafrost Under Static AxialCompressive Load1This standard is issued under the fixed designation D5780;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONThese test methods have been prepared to cover methods of axial load testing of piles in permafrost.The provisions permit the introduction of more detailed requirements and procedures when requiredto satisfy the objectives of the test program.The procedures herein produce a relationship betweenapplied load and pile settlement for conditions of ground temperature at the time of test.The resultsmay be interpreted to establish long-term load capacity of piles in permafrost.1.Scope1.1 The test methods described in this standard measure theaxial deflection of a vertical or inclined deep foundation whenloaded in static axial compression.These methods apply to alldeep foundations,referred to herein as piles,that function in amanner similar to driven piles or cast-in-place piles,regardlessof their method of installation,and may be used for testingsingle piles or pile groups.The test results may not representthe long-term performance of a deep foundation.1.2 This standard provides minimum requirements for test-ing deep foundations under static axial compressive load.Plans,specifications,and/or provisions prepared by a qualifiedengineer may provide additional requirements and proceduresas needed to satisfy the objectives of a particular test program.The engineer in responsible charge of the foundation design,referred to herein as the Engineer,shall approve anydeviations,deletions,or additions to the requirements of thisstandard.1.3 This standard allows the following test procedures:Procedure AQuick Test8.1.2Procedure BMaintained Test(Optional)8.1.3Procedure CLoading in Excess ofMaintained Test(Optional)8.1.4Procedure DConstant Time IntervalTest(Optional)8.1.5Procedure EConstant Rate ofPenetration Test(Optional)8.1.6Procedure FConstant MovementIncrement Test(Optional)8.1.7Procedure GCyclic Loading Test(Optional)8.1.81.4 Apparatus and procedures herein designated“optional”may produce different test results and may be used only whenapproved by the Engineer.The word“shall”indicates amandatory provision,and the word“should”indicates arecommended or advisory provision.Imperative sentencesindicate mandatory provisions.1.5 A qualified geotechnical engineer should interpret thetest results obtained from the procedures of this standard so asto predict the actual performance and adequacy of piles used inthe constructed foundation.See Appendix X1 for commentsregarding some of the factors influencing the interpretation oftest results.1.6 A qualified engineer shall design and approve all load-ing apparatus,loaded members,support frames,and testprocedures.The text of this standard references notes and1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.19 on Frozen Soils andRock.Current edition approved Nov.15,2018.Published December 2018.Originallyapproved in 1995.Last previous edition approved in 2010 as D5780 10.DOI:10.1520/D5780_D5780M-18.Copyright 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.1 footnotes which provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the standard.This standard alsoincludes illustrations and appendixes intended only for ex-planatory or advisory use.1.7 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.1.8 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In this system,the poundlbf represents a unit of force weight,while the unit for massis slugs.The rationalized slug unit is not given,unless dynamicF=ma calculations are involved.1.9 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.10 The method used to specify how data are collected,calculated,or recorded in this standard is not directly related tothe accuracy to which the data can be appl