1、Designation: A807/A807M 17Standard Practice forInstalling Corrugated Steel Structural Plate Pipe for Sewersand Other Applications1This standard is issued under the fixed designation A807/A807M; the number immediately following the designation indicates the yearof original adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice primarily covers procedures, soils, and soilplacement for the proper installation
3、 of corrugated steel struc-tural plate pipe, pipe-arches, arches, and underpasses producedto Specification A761/A761M, in either trench or embankmentinstallations. This practice also covers installation of structuralplate for alternative uses that do not involve backfilling orsoil-structure interact
4、ion.1.2 A typical trench installation and a typical embankment(projection) installation are shown in Figs. 1 and 2, respec-tively. Structural plate structures as described herein are thosestructures factory fabricated in plate form and bolted togetheron site to provide the required shape, size, and
5、length ofstructure. This practice applies to structures designed in accor-dance with Practice A796/A796M.1.3 The values stated in either inch-pound units or SI unitsshall be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem must be u
6、sed independently of the other, withoutcombining values in any way. SI units are shown in brackets inthe text for clarity, but they are the applicable values when theinstallation is to be performed using SI units.1.4 This standard does not purport to address all of thesafety concerns, if any, associ
7、ated 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 applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally reco
8、gnized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A761/A761M Specifica
9、tion for Corrugated Steel StructuralPlate, Zinc-Coated, for Field-Bolted Pipe, Pipe-Arches,and ArchesA796/A796M Practice for Structural Design of CorrugatedSteel Pipe, Pipe-Arches, and Arches for Storm and Sani-tary Sewers and Other Buried ApplicationsA902 Terminology Relating to Metallic Coated Ste
10、el Prod-uctsD698 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 MethodD1557 Test Methods for Laboratory Compaction Character-istics of Soil Using Modified E
11、ffort (56,000 ft-lbf/ft3(2,700 kN-m/m3)D2167 Test Method for Density and Unit Weight of Soil inPlace by the Rubber Balloon MethodD2487 Practice for Classification of Soils for EngineeringPurposes (Unified Soil Classification System)D6938 Test Methods for In-Place Density and Water Contentof Soil and
12、 Soil-Aggregate by Nuclear Methods (ShallowDepth)D2937 Test Method for Density of Soil in Place by theDrive-Cylinder Method2.2 AASHTO Standards3AASHTO LRFD Construction Specifications3. Terminology3.1 DefinitionsFor definitions of general terms used in thispractice, refer to Terminology A902.3.2 Def
13、initions of Terms Specific to This Standard:1This practice is under the jurisdiction of ASTM Committee A05 on Metallic-Coated Iron and Steel Products and is the direct responsibility of SubcommitteeA05.17 on Corrugated Steel Pipe Specifications.Current edition approved Dec. 1, 2017. Published Decemb
14、er 2017. Originallyapproved in 1982. Last previous edition approved in 2013 as A807/A807M - 13.DOI: 10.1520/A0807_A0807M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, r
15、efer to the standards Document Summary page onthe ASTM 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box
16、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
17、 World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.1 archa part circle shape spanning an open invertbetween the footings on which it rests.3.2.2 beddingthe earth or other material on which a pipeis supported.3.2.3 haunchthe portion of the pipe cross section betweenthe maximum
18、 horizontal dimension and the top of the bedding.3.2.4 invertthe lowest point on the pipe cross section;also, the bottom portion of a pipe.3.2.5 pipea conduit having full circular shape; also, in ageneral context, all structure shapes covered by this practice.3.2.6 pipe-archan arch shape with an app
19、roximate semi-circular crown, small-radius corners, and large-radius invert.3.2.7 underpassa high arch shape with an approximatesemicircular crown, large-radius sides, small-radius cornersbetween sides and invert, and large-radius invert.4. Significance and Use4.1 Structural plate structures functio
20、n structurally as aflexible ring that is supported by and interacts with thecompacted surrounding soil. The soil placed around the struc-ture is thus an integral part of the structural system. It istherefore important to ensure that the soil structure is made upof acceptable material and is well con
21、structed. Field verifica-tion of soil structure acceptability using Test Methods D1556,D2167, D6938,orD2937, as applicable, and comparing theFIG. 1 Typical Trench InstallationFIG. 2 Typical Embankment (Projection) InstallationA807/A807M 172results with either Test Methods D698 or D1557, in accordanc
22、ewith the specifications for each project, is the most commonbasis for installation of an acceptable structure. Depending onthe backfill used, other qualitative or performance-based meth-ods acceptable to the engineer may also be used. The requireddensity and method of measurement are not specified
23、by thispractice, but must be established in the specifications for eachproject.4.2 Structural plate structures are also occasionally used inalternative applications not requiring soil-structure interactionfor support. Depending on the application the structure mayprovide temporary or permanent suppo
24、rt, confinement,concealment, shielding, or other functions not related tosoil-structure interaction. The nature of support required,design requirements, and proper sizing of the structure will bedetermined by a project design engineer and is not part of thescope of this standard.5. Trench Excavation
25、5.1 To obtain the anticipated structural performance ofstructural plate structures, it is not necessary to control trenchwidth beyond the minimum necessary for proper assembly ofthe structure and placement of the structural backfill. However,the soil on each side beyond the excavated trench must be
26、ableto support anticipated loads. Any sloughed material shall beremoved from the trench or compacted to provide the neces-sary support. When a construction situation calls for a rela-tively wide trench, it may be made as wide as required, for itsfull depth if so desired. However, trench excavation m
27、ust be incompliance with any local, state, and federal codes and safetyregulations.6. Foundation6.1 The supporting soil beneath the structure must provide areasonably uniform resistance to the imposed load, bothlongitudinally and laterally. Sharp variations in the foundationmust be avoided. When roc
28、k is encountered, it must beexcavated and replaced with soil. If the structure is to be placedon a continuous rock foundation, it will be necessary to providea bedding of soil between rock and structure. See Fig. 3.6.2 Lateral changes in foundation should never be such thatthe structure is firmly su
29、pported while the backfill on eitherside is not. When soft material is encountered in the structureexcavation and must be removed to maintain the grade (limitsettlement) of the structure, then it must be removed, usuallyfor a minimum of three structure widths (see Fig. 4). A smallerwidth of removal
30、can sometimes be used if established by theengineer.6.3 Performance of buried structures is enhanced by allow-ing the structure to settle slightly relative to the columns ofearth alongside. Therefore, when significant settlement of theoverall foundation is expected, it is beneficial to provide ayiel
31、ding foundation under structural plate structures.Ayieldingfoundation is one that allows the structure to settle vertically bya greater amount than the vertical settlement of the columns ofearth alongside. It can usually be obtained by placing a layer ofNOTE 1Section B-B is applicable to all continu
32、ous rock foundations.FIG. 3 Foundation Transition Zones and Rock FoundationsA807/A807M 173compressible soil of suitable thickness beneath the structurethat is less densely compacted than the soil alongside. This isparticularly important on structures with relatively large-radiusinvert plates.6.4 For
33、 all structures with relatively small-radius cornerplates adjacent to large-radius invert plates (such as pipe-arches or underpass structures), excellent soil support must beprovided adjacent to the small-radius corner plates by both theFIG. 4 Soft Foundation TreatmentFIG. 5 Bedding and Corner Zone
34、Treatment for Large-Radius Invert Plate StructuresA807/A807M 174in situ foundation and the structural backfill. See Figs. 4 and 5.A yielding foundation must be provided beneath the invertplates for such structures when soft foundation conditions areencountered.6.5 The engineer is encouraged to devel
35、op details specific tothe site based on the general principles for foundation condi-tions given in 6.1 through 6.4.7. Bedding7.1 In most cases, structural plate structures may be as-sembled directly on in-situ material fine-graded to properalignment and grade. Take care to compact the materialbeneat
36、h the haunches before placing structural backfill. Mate-rial in contact with the pipe must not contain rock retained ona 3 in. 75 mm diameter ring, frozen lumps, chunks of highlyplastic clay, organic matter, corrosive material, or other delete-rious material. For structures with relatively small-rad
37、iuscorner plates adjacent to large-radius invert plates, it isrecommended to either shape the bedding to the invert plateradius or fine-grade the foundation to a slight V-shape. The soiladjacent to the corners shall be of an excellent quality andhighly compacted to accommodate the high reaction pres
38、suresthat can develop at that location. See Fig. 5.7.2 Structures having a span greater than 15 ft 4.5 m or adepth of cover greater than 20 ft 6 m should be provided witha shaped bedding on a yielding foundation. The bedding shouldbe shaped to facilitate the required compaction of the structuralback
39、fill under the haunches. A shaped bedding on a yieldingfoundation is always required under structures with small-radius corner plates adjacent to large-radius invert plates.8. Assembly8.1 Structural plate structures are furnished in componentsof plates and fasteners for field assembly. These compone
40、ntsare furnished in accordance with Specification A761/A761M.Plates are furnished in various widths and multiple lengths,preformed and punched for assembling into the requiredstructure shape, size, and length. The plate widths form theperiphery of the structure. The various widths and the multiplele
41、ngths can be arranged to allow for staggered seams (longi-tudinal or transverse, or both) to avoid four-plate laps. Thefabricator of the structural plate shall furnish an assemblydrawing showing the location of each plate by width, length,thickness, and curvature. The plates must be assembled inacco
42、rdance with the fabricators drawing.8.2 For structures with inverts, assembly shall begin withthe invert plates at the downstream end. As assembly proceedsupstream, plates that fall fully or partly below the maximumwidth of the structure are lapped over the preceding plates toconstruct the transvers
43、e seams.8.3 Arches have no integral invert and usually rest in specialchannels cast into, or connected to, footings. Channels must beaccurately set to span, line, and grade as shown on thefabricators drawing. When the arch is other than a half circle,the channel must be rotated in the footing to all
44、ow for entranceof the plates. For arches with ends cut on a skew, the basechannels will also be skewed, but properly aligned across thestructure. All pertinent dimensions must be shown on thefabricators drawing. For arch structures, assembly begins atthe upstream end and proceeds downstream, with ea
45、ch suc-ceeding plate lapping on the outside of the previous plate.Plates attached to the footing channel are not self-supportingand will require temporary support. Assemble as few plates aspractical, from the channels toward the top center of thestructure, and complete the periphery to maintain the
46、structureshape.8.4 Generally, structural plate should be assembled with asfew bolts as practical. These bolts should be placed loose andremain loose until the periphery has been completed for severalplate lengths. However, on large structures, it is practical toalign bolt holes during assembly and t
47、ighten the bolts tomaintain structure shape. After the periphery of the structure iscompleted for several plate lengths, all bolts may be placed andtightened. Correct any significant deviation in structure shapebefore tightening bolts (see Section 10). It is advisable not totighten bolts on the loos
48、ely assembled structure within adistance of 30 ft 9 m of where plate assembly is ongoing. Allbolts shall be tightened using an applied torque of between 100and 300 ft-lbf 135 and 405 Nm. It is important not toovertorque the bolts.8.5 Standard structural plate structures, because of thebolted constru
49、ction, are not intended to be watertight. Onoccasions in which a degree of watertightness is required, aseam sealant tape may be used within the bolted seams. Thetape shall be wide enough to effectively cover all rows of holesin plate laps, and of the proper thickness and consistency toeffectively fill all voids in plate laps. General procedures forinstalling sealant tape are as follows: On longitudinal seams,before placing the lapping plate, roll the tape over the seam andwork into the corrugations. Do not stretch the tape. Removeany paper backing before
