As utilities tackle the challenges of rehabilitating and expanding water distribution and wastewater collection networks, they are increasingly turning to trenchless installation methods to reduce cost and minimize disruption to the public.Jack-and-bore installation is often one of the most economical, reliable, and accurate ways to install a new cased pipe under established highways and railways without having to disrupt or impede the use of those arteries. The cost and sizing of a jack-and-bore installation is directly related to the largest cross section diameter of the carrier pipe. For example, if a design calls for a 24-inch C905 PVC bell and spigot carrier pipe, the designer must select a casing size that will accommodate the OD of the pipe bell (~32 inches). If a mechanical bell restrainer is required, the casing size must be increased to accommodate an OD of ~35 inches. In this example, the designer would typically select a42-inch steel casing to accommodate the restrained pipe section.
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