ASTM_D_7277_-_08.pdf

Designation:D727708Standard Test Method forPerformance Testing of Articulating Concrete Block(ACB)Revetment Systems for Hydraulic Stability in Open ChannelFlow1This standard is issued under the fixed designation D7277;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.1.Scope1.1 The purpose of this test method is to provide specifica-tions for the hydraulic testing of full-scale articulating concreteblock(ACB)revetment systems under controlled laboratoryconditions for purposes of identifying stability performance insteep slope,high-velocity flows.The testing protocols,includ-ing system installation,test procedures,measurementtechniques,analysis techniques,and reporting requirements aredescribed in this test method.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.2.1 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In this system,the pound(lbf)represents a unit of force(weight),while the unit for massis slugs.The rationalized slug unit is not given,unless dynamic(F=ma)calculations are involved.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D422 Test Method for Particle-Size Analysis of SoilsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for Laboratory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600kN-m/m3)D1556 Test Method for Density and Unit Weight of Soil inPlace by Sand-Cone MethodD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classification System)D4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD5195 Test Method for Density of Soil and Rock In-Place atDepths Below Surface by Nuclear Methods3.Terminology3.1 Definitions:3.1.1 For common definitions of technical terms in this testmethod,refer to Terminology D653.3.1.2 articulating concrete block(ACB)revetment system,nin erosion control,a matrix of interconnected concreteblock units for erosion protection.Units are typically con-nected by geometric interlock,cables,ropes,geotextile,geogrids or a combination thereof and typically include ageotextile underlayment.3.1.3 depth of flow,yo,(L),nin hydraulics,the distancefrom the channel thalweg to the water surface,measurednormal to the direction of flow,for a given discharge.3.1.4 design discharge,Qd,(L3T1),nin erosion control,the volumetric quantity of water flow within a channel whichis typically used in determining required channel dimensionsand suitable lining materials for ensuring adequate channelcapacity and stability.3.1.4.1 DiscussionThe discharge associated with a speci-fied frequency of recurrence,for example,an n-year flood.Then-year flood event has a probability of 1/n of being equaled orexceeded in any given year.3.1.5 discharge,Q,(L3T1),nin channel flow,the volumeof water flowing through a cross-section in a unit of time,including sediment or other solids that may be dissolved in ormixed with the water;usually cubic feet per second(ft3/s)orcubic meters per second(m3/s).3.1.6 hydraulic radius,(L),nin channel flow,the cross-sectional area of flow divided by the wetted perimeter.1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.25 on Erosion and SedimentControl Technology.Current edition approved Aug.1,2008.Published September 2008.DOI:10.1520/D7277-08.2For 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 Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.7 local velocity,(L3T1),nin channel flow,the veloc-ity at a specific point in the flow region.May be defined as adirection-dependent quantity with components Vx,Vy,or Vz.3.1.8 mean velocity,(LT1),nin hydraulics,the averagevelocity throughout a channel cross section.Defined as thedischarge divided by the cross-sectional area of flow usuallyexpressed in meters per second(m/s)or feet per second(ft/s).3.1.9 subcritical flow,(LT1),nin channel flow,a charac-teristic of flowing water whereby gravitational forces d