1、Designation:D812322Standard Test Methods forMeasuring the Opening Size of Geohazard Nettings1This standard is issued under the fixed designation D8123;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods are index tests to measure theopening size of a geohazard netting,or its components,or both,as it has been manufactured.They c
3、an be used for estimatingthe largest size of rock or other object that may pass through anindividual opening in the geohazard netting without transfer-ring load to the wire mesh or wire net and may also be used forquality control purposes.These test methods are not used todetermine the maximum size
4、rock or other object that thegeohazard netting may contain through mobilization of thenettings strength.These test methods do not apply to themeasurement of the opening size of a geosynthetic,such as aturf reinforcement mat or geotextile,that may be manufacturedas a composite system with the geohaza
5、rd netting.1.2 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses are provided forinformation only and are not considered standard.Reporting oftest results in units other than SI shall not be regarded asnonconformance with this standard.1.3 All observed
6、and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.3.1 For purposes of comparing a measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the nearest decimal of significantdigits i
7、n the specified limit.1.3.2 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material v
8、ariation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objective;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
9、digits used in analysismethods for engineering design.1.4 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 app
10、licability of regulatory limitations prior to use.1.5 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
11、the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering De
12、sign and ConstructionD6026 Practice for Using Significant Digits and Data Re-cords in Geotechnical Data3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 geohazardnetting
13、opening,ningeohazardmitigation,the minimum clear distance between the wires orwire ropes forming the mesh structure.3.2.2 geohazard netting opening size,nin geohazardmitigation,the measurement of the minimum clear distancebetween the wires or wire ropes forming the opposite sides ofthe wire mesh or
14、net opening.3.3 Definitions:3.3.1 geohazard netting,nin geohazard mitigation,a ma-terial made typically from steel wire,or wire ropes,or both,1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on Erosion andSedimen
15、t Control Technology.Current edition approved Jan.15,2022.Published January 2022.DOI:10.1520/D8123-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Docum
16、ent Summary page onthe ASTM website.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.1interwoven or connected in such a manner
