1、Designation: A807/A807M 02 (Reapproved 2008)A807/A807M 13Standard 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 origi
2、nal adoption or, in the case of 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 covers procedures, soils, and soil placement for t
3、he proper installation of corrugated steel structural plate pipe,pipe-arches, arches, and underpasses produced to Specification A761/A761M, in either trench or embankment installations. Atypical trench installation and a typical embankment (projection) installation are shown in Figs. 1 and 2, respec
4、tively. Structuralplate structures as described herein are those structures factory fabricated in plate form and bolted together on site to provide therequired shape, size, and length of structure. This practice applies to structures designed in accordance with Practice A796/A796M.1.2 This standard
5、does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.3 The values stated in either inc
6、h-pound units or SI units shall be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system must be used independently of the other, without combining valuesin any way. SI units are shown in brackets in the text for clarity, but they are t
7、he applicable values when the installation is to beperformed using SI units.2. Referenced Documents2.1 ASTM Standards:2A761/A761M Specification for Corrugated Steel Structural Plate, Zinc-Coated, for Field-Bolted Pipe, Pipe-Arches, and ArchesA796/A796M Practice for Structural Design of Corrugated St
8、eel Pipe, Pipe-Arches, and Arches for Storm and Sanitary Sewersand Other Buried ApplicationsA902 Terminology Relating to Metallic Coated Steel ProductsD698 Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft3 (600 kN-m/m3)D1556 Test Method for Densi
9、ty and Unit Weight of Soil in Place by Sand-Cone MethodD1557 Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700kN-m/m3)D2167 Test Method for Density and Unit Weight of Soil in Place by the Rubber Balloon MethodD2487 Practice for Classificat
10、ion of Soils for Engineering Purposes (Unified Soil Classification System)D2922D6938 Test MethodsMethod for Density In-Place Density and Water Content of Soil and Soil-Aggregate in Place byNuclear Methods (Shallow Depth) (Withdrawn 2007)D2937 Test Method for Density of Soil in Place by the Drive-Cyl
11、inder Method2.2 AASHTO Standards3AASHTO LRFD Construction Specifications3. Terminology3.1 DefinitionsFor definitions of general terms used in this practice, refer to Terminology A902.3.2 Definitions of Terms Specific to This Standard:1 This practice is under the jurisdiction of ASTM Committee A05 on
12、 Metallic-Coated Iron and Steel Products and is the direct responsibility of Subcommittee A05.17on Corrugated Steel Pipe Specifications.Current edition approved Nov. 1, 2008Nov. 1, 2013. Published December 2008November 2013. Originally approved in 1982. Last previous edition approved in 20022008as A
13、807/A807M - 02 1.(2008). DOI: 10.1520/A0807_A0807M-02R08.10.1520/A0807_A0807M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page
14、on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.Available from American Association of State Highway and Transportation Officials(AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001, http:/www.transportation.org.This document is
15、not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropri
16、ate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.1 archa part circle shape spanning an open invert between the
17、 footings on which it rests.3.2.2 beddingthe earth or other material on which a pipe is supported.3.2.3 haunchthe portion of the pipe cross section between the maximum horizontal dimension and the top of the bedding.3.2.4 invertthe lowest point on the pipe cross section; also, the bottom portion of
18、a pipe.3.2.5 pipea conduit having full circular shape; also, in a general context, all structure shapes covered by this practice.3.2.6 pipe-archan arch shape with an approximate semicircular crown, small-radius corners, and large-radius invert.3.2.7 underpassa high arch shape with an approximate sem
19、icircular crown, large-radius sides, small-radius corners betweensides and invert, and large-radius invert.4. Significance and Use4.1 Structural plate structures function structurally as a flexible ring that is supported by and interacts with the compactedsurrounding soil. The soil placed around the
20、 structure is thus an integral part of the structural system. It is therefore important toensure that the soil structure is made up of acceptable material and is well constructed. Field verification of soil structureacceptability using Test Methods D1556, D2167, D2922D6938, or D2937, as applicable,
21、and comparing the results with either TestMethods D698 or D1557, in accordance with the specifications for each project, is the most reliablecommon basis for installationFIG. 1 Typical Trench InstallationFIG. 2 Typical Embankment (Projection) InstallationA807/A807M 132of an acceptable structure. Dep
22、ending on the backfill used, other qualitative or performance-based methods acceptable to theengineer may also be used. The required density and method of measurement are not specified by this practice, but must beestablished in the specifications for each project.5. Trench Excavation5.1 To obtain t
23、he anticipated structural performance of structural plate structures, it is not necessary to control trench widthbeyond the minimum necessary for proper assembly of the structure and placement of the structural backfill. However, the soil oneach side beyond the excavated trench must be able to suppo
24、rt anticipated loads. Any sloughed material shall be removed fromthe trench or compacted to provide the necessary support. When a construction situation calls for a relatively wide trench, it maybe made as wide as required, for its full depth if so desired. However, trench excavation must be in comp
25、liance with any local,state, and federal codes and safety regulations.6. Foundation6.1 The supporting soil beneath the structure must provide a reasonably uniform resistance to the imposed load, bothlongitudinally and laterally. Sharp variations in the foundation must be avoided. When rock is encoun
26、tered, it must be excavatedand replaced with soil. If the structure is to be placed on a continuous rock foundation, it will be necessary to provide a beddingof soil between rock and structure. See Fig. 3.6.2 Lateral changes in foundation should never be such that the structure is firmly supported w
27、hile the backfill on either sideis not. When soft material is encountered in the structure excavation and must be removed to maintain the grade (limit settlement)of the structure, then it must be removed, usually for a minimum of three structure widths (see Fig. 4).Asmaller width of removalcan somet
28、imes be used if established by the engineer.6.3 Performance of buried structures is enhanced by allowing the structure to settle slightly relative to the columns of earthalongside. Therefore, when significant settlement of the overall foundation is expected, it is beneficial to provide a yieldingfou
29、ndation under structural plate structures. A yielding foundation is one that allows the structure to settle vertically by a greateramount than the vertical settlement of the columns of earth alongside. It can usually be obtained by placing a layer of compressiblesoil of suitable thickness beneath th
30、e structure that is less densely compacted than the soil alongside. This is particularly importanton structures with relatively large-radius invert plates.6.4 For all structures with relatively small-radius corner plates adjacent to large-radius invert plates (such as pipe-arches orunderpass structu
31、res), excellent soil support must be provided adjacent to the small-radius corner plates by both the in situNOTE 1Section B-B is applicable to all continuous rock foundations.FIG. 3 Foundation Transition Zones and Rock FoundationsA807/A807M 133foundation and the structural backfill. See Figs. 4 and
32、5.Ayielding foundation must be provided beneath the invert plates for suchstructures when soft foundation conditions are encountered.6.5 The engineer is encouraged to develop details specific to the site based on the general principles for foundation conditionsgiven in 6.1 through 6.4.7. Bedding7.1
33、In most cases, structural plate structures may be assembled directly on in-situ material fine-graded to proper alignment andgrade. Take care to compact the material beneath the haunches before placing structural backfill. Material in contact with the pipeFIG. 4 Soft Foundation TreatmentFIG. 5 Beddin
34、g and Corner Zone Treatment for Large-Radius Invert Plate StructuresA807/A807M 134must not contain rock retained on a 3 in. 75 mm diameter ring, frozen lumps, chunks of highly plastic clay, organic matter,corrosive material, or other deleterious material. For structures with relatively small-radius
35、corner plates adjacent to large-radiusinvert plates, it is recommended to either shape the bedding to the invert plate radius or fine-grade the foundation to a slightV-shape. The soil adjacent to the corners shall be of an excellent quality and highly compacted to accommodate the high reactionpressu
36、res that can develop at that location. See Fig. 5.7.2 Structures having a span greater than 15 ft 4.5 m or a depth of cover greater than 20 ft 6 m should be provided with ashaped bedding on a yielding foundation. The bedding should be shaped to facilitate the required compaction of the structuralbac
37、kfill under the haunches. A shaped bedding on a yielding foundation is always required under structures with small-radiuscorner plates adjacent to large-radius invert plates.8. Assembly8.1 Structural plate structures are furnished in components of plates and fasteners for field assembly. These compo
38、nents arefurnished in accordance with Specification A761/A761M. Plates are furnished in various widths and multiple lengths, preformedand punched for assembling into the required structure shape, size, and length. The plate widths form the periphery of the structure.The various widths and the multip
39、le lengths can be arranged to allow for staggered seams (longitudinal or transverse, or both) toavoid four-plate laps. The fabricator of the structural plate shall furnish an assembly drawing showing the location of each plateby width, length, thickness, and curvature. The plates must be assembled i
40、n accordance with the fabricators drawing.8.2 For structures with inverts, assembly shall begin with the invert plates at the downstream end. As assembly proceedsupstream, plates that fall fully or partly below the maximum width of the structure are lapped over the preceding plates to constructthe t
41、ransverse seams.8.3 Arches have no integral invert and usually rest in special channels cast into, or connected to, footings. Channels must beaccurately set to span, line, and grade as shown on the fabricators drawing. When the arch is other than a half circle, the channelmust be rotated in the foot
42、ing to allow for entrance of the plates. For arches with ends cut on a skew, the base channels will alsobe skewed, but properly aligned across the structure.All pertinent dimensions must be shown on the fabricators drawing. For archstructures, assembly begins at the upstream end and proceeds downstr
43、eam, with each succeeding plate lapping on the outside ofthe previous plate. Plates attached to the footing channel are not self-supporting and will require temporary support. Assemble asfew plates as practical, from the channels toward the top center of the structure, and complete the periphery to
44、maintain thestructure shape.8.4 Generally, structural plate should be assembled with as few bolts as practical. These bolts should be placed loose and remainloose until the periphery has been completed for several plate lengths. However, on large structures, it is practical to align bolt holesduring
45、 assembly and tighten the bolts to maintain structure shape.After the periphery of the structure is completed for several platelengths, all bolts may be placed and tightened. Correct any significant deviation in structure shape before tightening bolts (seeSection 10). It is advisable not to tighten
46、bolts on the loosely assembled structure within a distance of 30 ft 9 m of where plateassembly is ongoing. All bolts shall be tightened using an applied torque of between 100 and 300 ft-lbf 135 and 405 Nm. It isimportant not to overtorque the bolts.8.5 Standard structural plate structures, because o
47、f the bolted construction, are not intended to be watertight. On occasions inwhich a degree of watertightness is required, it is practical to introduce a seam sealant tape may be used within the bolted seams.The tape shall be wide enough to effectively cover all rows of holes in plate laps, and of t
48、he proper thickness and consistency toeffectively fill all voids in plate laps. General procedures for installing sealant tape are as follows: On longitudinal seams, beforeplacing the lapping plate, roll the tape over the seam and work into the corrugations. Do not stretch the tape. Remove any paper
49、backing before making up the joint. Seal transverse seams in a like manner with tape. At all points where three plates intersect,place an additional thickness of tape for a short distance to fill the void caused by the transverse seam overlap. It is most practicalto punch the tape for bolts with a hot spud wrench or sharp tool. Several hours after the bolts are initially tightened, a secondtightening will usually be necessary to maintain a minimal torque level and properly seat the plates. Since the seam sealant tapewill creep (flow) from the joint und
