1、Designation:D556794(Reapproved 2011)Standard Test Method forHydraulic Conductivity Ratio(HCR)Testing of Soil/Geotextile Systems1This standard is issued under the fixed designation D5567;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision
2、,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 This test method covers laboratory measurement of thehydraulic conductivity of water-saturated porous material
3、swith a flexible-wall permeameter.1.2 This test method may be used with undisturbed orcompacted soil specimens that have a hydraulic conductivityless than or equal to 5 102cm/s.1.3 The filtration behavior of soils with hydraulic conduc-tivities greater than 5 102cm/s may be determined by thegradient
4、 ratio test(Test Method D5101).1.4 The values stated in SI units are to be regarded as thestandard,although other units are provided for information andclarification purposes.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibilit
5、y 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 Contai
6、nedFluidsD698 Test Methods for Laboratory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600kN-m/m3)D854 Test Methods for Specific Gravity of Soil Solids byWater PycnometerD1587 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical PurposesD2216 Test Methods fo
7、r Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classification System)D2488 Practice for Description and Identification of Soils(Visual-Manual Procedure)D4220 Practices for Preserving and Tra
8、nsporting SoilSamplesD4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD4491 Test Methods for Water Permeability of Geotextilesby Permittivi
9、tyD4647 Test Method for Identification and Classification ofDispersive Clay Soils by the Pinhole TestD4751 Test Method for DeterminingApparent Opening Sizeof a GeotextileD5084 Test Methods for Measurement of Hydraulic Con-ductivity of Saturated Porous Materials Using a FlexibleWall PermeameterD5101
10、Test Method for Measuring the Filtration Compat-ibility of Soil-Geotextile Systems3.Terminology3.1 Definitions:3.1.1 filter,na layer or combination of layers of previousmaterials designed and installed in such a manner as to providedrainage,yet prevent the movement of soil particles due toflowing wa
11、ter(Terminology D653).3.1.1.1 DiscussionA geotextile filter is the term used for alayer or combination of layers of pervious geosynthetic mate-rial(s)that are used in the capacity of a filter as defined above.3.1.2 geotextile,nany permeable textile material usedwith foundation,soil,rock,earth,or any
12、 other geotechnicalengineering related material,as an integral part of a man-madeproduct,structure,or system(Terminology D4439).1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme-ability and Filtration.Cu
13、rrent edition approved June 1,2011.Published July 2011.Originally approvedin 1994.Last previous edition approved in 2006 as D556794(2006).DOI:10.1520/D5567-94R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of A
14、STMStandards 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 3.1.3 hydraulic conductivity(k),nthe rate of discharge ofwater under laminar flow conditions t
15、hrough a unit cross-sectional area of a porous medium under a unit hydraulicgradient and standard temperature conditions(20C)(TestMethod D5084).3.1.3.1 DiscussionThe term coeffcient of permeability isoften used instead of hydraulic conductivity,but hydraulicconductivity is used exclusively in this t
16、est method.Acompletediscussion of the terminology associated with Darcys law isgiven in the literature.33.1.4 permeation,nthe transmission of a fluid through aporous medium(NEW).3.1.5 pore volumes of flow(Vpq),nthe cumulative volumeof flow through a test specimen divided by the volume of voidswithin the specimen(modified from Test Method D5084).3.2 Definitions of Terms Specific to This Standard:3.2.1 hydraulic conductivity ratio(HCR),n the ratio ofthe hydraulic conductivity of the soil/geotextil
