1、Designation:C178616Standard Specification forSegmental Precast Reinforced Concrete Box Sections forCulverts,Storm Drains,and Sewers Designed According toAASHTO LRFD1This standard is issued under the fixed designation C1786;the number immediately following the designation indicates the year oforigina
2、l 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 This specification covers precast reinforced concretebox sections compris
3、ed of separate segments that once prop-erly field assembled make the final structure.These structuresare intended to be used for the construction of culverts and forthe conveyance of storm water,industrial wastes and sewage.NOTE1This specification is primarily a manufacturing and purchas-ing specifi
4、cation.However,box culverts manufactured to this standard areintended to meet the design requirements of the AASHTO LRFD BridgeDesign Specifications,and as such,design guidance is included inAppendix X1.NOTE2The successful performance of this product depends upon theproper selection of the box secti
5、on,bedding,backfill,and care that theinstallation conforms to the construction specifications.The purchaser ofthe precast reinforced concrete box sections specified herein is cautionedthat proper correlation of the loading conditions and the field requirementswith the box section specified,and provi
6、sion for inspection at theconstruction site,are required.1.2 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard.2.Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for
7、Concrete ReinforcementA706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA1064/A1064M Specification for Carbon-Steel Wire andWelded Wire Reinforcement,Plain and Deformed,forConcreteC33 Specification for Concrete AggregatesC150 Specification for Portland Ce
8、mentC260 Specification for Air-Entraining Admixtures for Con-creteC309 Specification for Liquid Membrane-Forming Com-pounds for Curing ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC497 Test Methods for Concrete Pipe,Manhole Sections,orTileC595 Specification for Blended Hydraul
9、ic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC822 Terminology Relating to Concrete Pipe and RelatedProductsC989 Specification for Slag Cement for Use in Concrete andMortarsC1116 Specification for Fiber-Reinforced Concrete andShotcrete2.2 AASHTO
10、 Standards:3AASHTO LRFD Bridge Design SpecificationsAASHTO LRFD Bridge Construction Specifications2.3 ACI Standards:4ACI 318 Building Code Requirements for Structural Con-crete3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 box sectionthe completed box culvert unit with allsegm
11、ents adjoined(see Fig.1 for configuration options).3.1.2 box segmentthe individual piece(top slab,bottomslab,or three-sided structure)that gets adjoined to other piecesto complete the final box section3.2 DefinitionsFor definitions of terms relating to concretebox culvert sections not found above,se
12、e Terminology C822.1This test method is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct responsibility of Subcommittee C13.07 onAcceptance Specifications and Precast Concrete Box Sections.Current edition approved Feb.1,2016.Published February 2016.Originallyapproved in
13、 2014.Las previous edition approved in 2014 as C1786 14.DOI:10.1520/C178616.2For 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 AST
14、M website.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.4Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonHills,MI 48333-9094,http:/www.concrete.org.Copyr
15、ight ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1FIG.1 Segment Configuration OptionsC1786 1624.Basis of Acceptance4.1 Acceptability of the box sections produced in accor-dance with this standard shall be determined by the results ofthe concrete
16、compressive strength tests described in Section10,by the material requirements described in Section 5,and byinspection of the finished box sections by the owner or theirdesignee.NOTE3The box culvert structure itself is not complete until it is fullyassembled in the field.Field assembly is not included in this specification.However,a final field inspection is recommended before the box culvertis considered fit for duty.5.Material5.1 Reinforced ConcreteThe reinforced concrete shallconsist of cemen
