Civil · C-AJ5ZN

Utility Trench Casing and Water Pipe Installation

Materials

Concrete Steel Stainless Steel Masonry / CMU

Elements

About this detail

A PVC water carrier pipe is installed within a larger reinforced concrete pipe casing pipe, supported by spacers maintaining a fifty millimeter clearance. The annular space between the carrier pipe and casing is backfilled with cement grout injected through thirty-eight millimeter diameter grout ports spaced at 2.4 meters on center. The casing assembly is bedded in a pipe zone of nineteen minus gravel compacted to ninety-six percent minimum relative density over fifty minus gravel bedding and engineering filter fabric. Detectable warning tape is positioned above the pipe zone beneath the hangar access apron, shoulder, and taxilane pavement sections.

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