ASTM D7180 D7180M-2005(2013)e1 1875 Standard Guide for Use of Expanded Polystyrene (EPS) Geofoam in Geotechnical Projects《土工技术项目用膨胀聚苯乙烯 (EPS) 土工泡沫使用的标准指南》.pdf
《ASTM D7180 D7180M-2005(2013)e1 1875 Standard Guide for Use of Expanded Polystyrene (EPS) Geofoam in Geotechnical Projects《土工技术项目用膨胀聚苯乙烯 (EPS) 土工泡沫使用的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7180 D7180M-2005(2013)e1 1875 Standard Guide for Use of Expanded Polystyrene (EPS) Geofoam in Geotechnical Projects《土工技术项目用膨胀聚苯乙烯 (EPS) 土工泡沫使用的标准指南》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7180/D7180M 05 (Reapproved 2013)1Standard Guide forUse of Expanded Polystyrene (EPS) Geofoam inGeotechnical Projects1This standard is issued under the fixed designation D7180/D7180M; the number immediately following the designation indicates theyear of original adoption or, in the case
2、 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.1NOTEUnits information was editorially corrected in July 2013.1. Scope1.1 This guide covers some of the
3、basic considerations forthe use of expanded polystyrene (EPS) geofoam in geotechni-cal projects.1.2 This guide offers a collection of information and doesnot recommend a course of action. This guide cannot replaceeducation or experience and should be used in conjunction withprofessional judgment. No
4、t all aspects of this guide may beapplicable in all circumstances.1.3 This guide is not intended to represent or replace thestandard of care by which the adequacy of a given professionalservice must be judged, nor should this guide be appliedwithout consideration of a projects many unique aspects.1.
5、4 The word “standard” in the title of this guide means onlythat this guide has been approved through the ASTM Interna-tional consensus process.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equiv
6、alents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of
7、 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:2D4439 Terminology for GeosyntheticsD6817 Specification for Rigid Cellular Polystyrene Geo-foam3. Terminology3.1 Defi
8、nitionsTerms used in this guide are defined inTerminology D4439.3.1.1 geofoam, nblock or planar rigid cellular foam poly-meric material used in geotechnical engineering applications.3.2 Definitions of Terms Specific to This Standard:3.2.1 expanded polystyrene, ntype of foamed plasticformed by the ex
9、pansion of polystyrene resin beads in amolding process.3.3 Acronyms:3.3.1 EPS, nexpanded polystyrene.3.3.2 EPS geofoam, nrigid cellular polystyrene geofoammanufactured from EPS.4. Summary of Guide4.1 EPS geofoam is commonly used in geotechnical appli-cations when an extremely lightweight material is
10、 required.This guide covers some of the considerations that must beevaluated in the design of these projects.5. Significance and Use5.1 This guide informs the user of design considerations inthe use of EPS geofoam which assist in the determination ofthe appropriate EPS geofoam for geotechnical appli
11、cations.1This guide is under the jurisdiction ofASTM Committee D35 on Geosyntheticsand is the direct responsibility of Subcommittee D35.03 on Permeability andFiltration.Current edition approved July 1, 2013. Published July 2013. Originally approvedin 2005. Last previous edition approved in 2009 as D
12、718005 (2009). DOI:10.1520/D7180_D7180M-05R13E01.2For 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 AS
13、TM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 This guide does not preclude the judgment and practiceof those competent in geotechnical design.6. Design Principles6.1 Design Considerations:6.1.1 Compressive Properties:6.1.1.1 The compressive
14、 resistance of EPS geofoam iscovered by Specification D6817. The compressive resistancefor geofoam is specified in Specification D6817 and includesthe compressive behavior of EPS geofoam at 1, 5, and 10 %strain.6.1.1.2 A typical limit for many EPS geofoam projects is toconsider the compressive resis
15、tance at 1 % strain. The com-pressive behavior at 1 % strain is within the elastic region ofEPS geofoam and provides acceptable short-term deflections inaddition to limiting long-term creep deformation.6.1.1.3 Creep deformations must be accounted for whenlong-term loads exceed the compressive resist
16、ance at 1 %strain.6.1.1.4 At a compressive resistance of 5 % strain, EPSgeofoam is beyond the elastic behavior region and is in theplastic behavior region.6.1.2 Compressive Resistance TestingThe compressive re-sistance described in 6.1.1 is determined from the uniformloading of 50-mm 2-in. cubes at
17、a prescribed loading rate.6.1.3 Load Distribution RequirementsIn applications withlocalized loading exceeding the compressive resistance at 1 %strain, a number of strategies can be used to reduce theeffective load on the EPS geofoam. A common method is theuse of a concrete slab with suitable reinfor
18、cement to distributethe load to levels below the compressive resistance at 1 %strain. A sufficient depth of cover material may also be used toreduce the project loads below the compressive resistance at1 % strain.6.1.4 Subgrade RequirementsEPS geofoam is usually in-stalled on a relatively planar sur
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