ASTM B788 B788M-2009 Standard Practice for Installing Factory-Made Corrugated Aluminum Culverts and Storm Sewer Pipe《工厂制造的波纹铝涵洞管和排水管的安装标准惯例》.pdf
《ASTM B788 B788M-2009 Standard Practice for Installing Factory-Made Corrugated Aluminum Culverts and Storm Sewer Pipe《工厂制造的波纹铝涵洞管和排水管的安装标准惯例》.pdf》由会员分享,可在线阅读,更多相关《ASTM B788 B788M-2009 Standard Practice for Installing Factory-Made Corrugated Aluminum Culverts and Storm Sewer Pipe《工厂制造的波纹铝涵洞管和排水管的安装标准惯例》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B788/B788M 09Standard Practice forInstalling Factory-Made Corrugated Aluminum Culverts andStorm Sewer Pipe1This standard is issued under the fixed designation B788/B788M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision,
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This practice describes
3、 procedures, soils, and soil place-ment for the proper installation of corrugated aluminumculverts and storm sewers in either trench or projectioninstallations. A typical trench installation is shown in Fig. 1,and a typical embankment (projection) installation is shown inFig. 2. The pipes described
4、in this practice are manufactured ina factory and furnished to the job in lengths ordinarily from 10to 30 ft 3 to 9 m, with 20 ft 6 m being common, for fieldjoining. This practice applies to structures designed in accor-dance with Practice B790/B790M.1.2 The values stated in either SI units or inch-
5、pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.2.1 SI UnitsSI units are shown in
6、the text in brackets,and they are the applicable values for metric installation.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and det
7、ermine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B745/B745M Specification for Corrugated Aluminum Pipefor Sewers and DrainsB790/B790M Practice for Structural Design of CorrugatedAluminum Pipe, Pipe-Arches, and Arches for Culverts,Storm Sewer
8、s, and Other Buried ConduitsD698 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 MethodD2167 Test Method for Density and Unit Weight of Soil inPlace by the R
9、ubber Balloon MethodD2487 Practice for Classification of Soils for EngineeringPurposes (Unified Soil Classification System)D2937 Test Method for Density of Soil in Place by theDrive-Cylinder Method1This practice is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the dir
10、ect responsibility of Subcommittee B07.08 onAluminum Culvert.Current edition approved Nov. 1, 2009. Published December 2009. Originallyapproved in 1988. Last previous edition approved in 2004 as B788/B788M 04.DOI: 10.1520/B0788_B0788M-09.2For referenced ASTM standards, visit the ASTM website, www.as
11、tm.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.FIG. 1 Typical Trench InstallationFIG. 2 Typical Embankment (Projection) Installation1*A Summary of Changes section appears
12、 at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D6938 Test Method for In-Place Density and Water Contentof Soil and Soil-Aggregate by Nuclear Methods (ShallowDepth)3. Terminology3.1 Definitions of Terms Sp
13、ecific to This Standard:3.1.1 bedding, nthe earth or other material on which apipe is supported.3.1.2 haunch, nthe portion of the pipe cross sectionbetween the maximum horizontal dimension and the top of thebedding.3.1.3 invert, nthe lowest point on the pipe cross section;also, the bottom portion of
14、 a pipe.3.1.4 pipe, na conduit having full circular shape; also, ina general context, all structure shapes covered by this practice.3.1.5 pipearch, na pipe with an approximate semicircu-lar crown, small-radius corners, and large-radius invert.4. Significance and Use4.1 Corrugated aluminum pipe funct
15、ions structurally as aflexible ring which is supported by and interacts with thecompacted surrounding soil. The soil constructed around thepipe is thus an integral part of the structural system. It istherefore important to ensure that the soil structure or backfillis made up of acceptable material a
16、nd is well-constructed.Field verification of soil structure acceptability using TestMethods D1556, D2167, D2937,orD6938 as applicable, andcomparing the results with Test Method D698 in accordancewith the specifications for each project, is the most reliablebasis for installation of an acceptable str
17、ucture. The requireddensity and method of measurement are not specified by thispractice, but they must be established in the specifications foreach project.5. Trench Excavation5.1 To obtain anticipated structural performance of corru-gated aluminum pipe it is not necessary to control trench widthbey
18、ond the minimum required for proper installation of pipeand backfill. However, the soil on each side beyond theexcavated trench must be able to support anticipated loads.When a construction situation calls for a relatively wide trench,it shall be made as wide as required, for its full depth if sodes
19、ired. However, trench excavation must be in compliancewith any local, state, and federal codes and safety regulations.6. Foundation6.1 The supporting soil beneath the pipe must provide areasonably uniform resistance to the imposed load, bothlongitudinally and laterally. Sharp variations in the found
20、ationmust be avoided. When rock is encountered, it must beexcavated and replaced with soil. If the pipe runs along acontinuous rock foundation, it is necessary to provide asuitable soil bedding under the pipe. See Fig. 3.6.2 Lateral changes in foundation should never be such thatthe pipe is firmly s
21、upported while the backfill alongside is not.When soft material is encountered during construction andmust be removed in order to provide an adequate foundation,remove the soft material for a distance of three pipe widths,unless the engineer has set another limit. See Fig. 4.6.3 Performance of burie
22、d pipe is enhanced by allowing thepipe to settle slightly under load compared to the columns ofsoil alongside. Thus, for larger pipes it can be beneficial topurposely create a foundation under the pipe itself which willyield under load more than will the foundation under thecolumns of soil to each s
23、ide. It can usually be obtained byplacing a layer of compressible soil of a suitable thickness, lessdensely compacted than the soil alongside, beneath the struc-ture. This creates favorable relative movement between pipeand the soil on each side. It is of particular importance onpipe-arches.6.4 Pipe
24、-ArchesAll pipe-arch structures must have excel-lent soil support at their corners by both the in-situ foundationand the structural backfill. See Fig. 4 and Fig. 5. They do notrequire the same degree of support under their large-radiusinverts.d =12 in./ft 40 mm/m of fill over pipe, with a 24-in. 600
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