Standard Practice for Direct Design of Buried Precast Concrete Pipe Using Standard Installations (SIDD)

Abstract

• Prepared by the Direct Design of Buried Concrete Pipe Box Sections Standards Committee of the Construction Institute of ASCE

  Standard ASCE/CI 15-17 focuses on the direct design of buried precast concrete pipe using standard installations, known as SIDD. The direct design method improves on indirect design, because direct design accounts for the soil pressure distribution around an installed pipe and provides a procedure for determining the pressure distribution coefficients for the standard installations.

  Standard Practice for Direct Design of Buried Precast Concrete Pipe Using Standard Installations reviews the design and construction of the soil–pipe interaction system used for the conveyance of sewage, industrial wastes, stormwater, and drainage. The SIDD method accounts for the interaction between pipe and soil envelope in determining loads, pressure distributions, moment, thrust, and shear. Construction requirements for excavation, safety, foundations, bedding, sheathing removal, and trench shield advancement are presented. Four types of standard embankment installations and four types of standard trench installations are covered. This standard, a revision of ASCE 15-98, includes updates to correlate with the latest ASTM International and American Concrete Pipe Association (ACPA) documents for trench and embankment conditions, as well as current soil classifications. Design equations for nonreinforced concrete pipe have been added.

  Standard ASCE/CI 15-17 may be used as a reference in preparing project specifications based on the SIDD method, and the limits state design procedure is consistent with the procedures outlined in the AASHTO Standard Specifications for Highway Bridges. This standard is useful to civil engineering design professionals, consultants, owners, and transportation officials.