CHAPTER 7 CONSTRUCTION PROCEDURES - Volume Four
309INTRODUCTIONThis CHAPTER presents information of fundamental importance regarding installationand CONSTRUCTION PROCEDURES including base preparation, unloading and assembly,and placement and compaction of the backfill. The emphasis is on corrugated steelpipe in embankment installations such as highway culverts. For pipe in trenchinstallation such as storm sewers, reference should be made to the CSPI publication, Modern Sewer Design for a thorough presentation. For additional information,reference may also be made to ASTM recommended practices under ASTMdesignations A 796 / A 796 M, A 798 / A 798 M, and A 807 / A 807 well situated, properly bedded, accurately assembled, and carefully backfilledgalvanized steel drainage structure will function properly and efficiently over itsdesign life.
7. INSTALLATION AND CONSTRUCTION PROCEDURES 313 Figure 7.3a Typical backfill envelope for pipe-arch or long span structures. Figure 7.3b Typical vee-shaped bedding for pipe-arches and large diameter structures. mm Alternate bedding detail with grade bottom graded in shallow vee.
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