Use of HDPE Pipe for a Sewer Siphon River Crossing

This paper discusses a value engineering study, design, and construction of a sanitary sewer siphon using high density polyethylene (HDPE) pipe in San Juan, Puerto Rico. The value engineering study evaluated pipe options and construction methods and recommended the use of HDPE pipe constructed in the wet for the Rio Puerto Nuevo river crossing. The design of the pipe included development of the horizontal and vertical alignments, pipe hydraulics, selection of pipe wall thickness, and pile clearance analysis. The HDPE pipe is joined using heat fusion, launched into the river, and covered. This paper also discusses details of the construction, which is in progress.