Successful Rehabilitation Project Utilizes Multiple Methods from the Trenchless Toolbox Case Study of an Infrastructure Renewal Program

摘要

Hampden Township (Township) is a growing municipality in central Pennsylvania. Although Pennsylvania as a whole has had a stagnant population in recent years, portions of the central part of the state are growing at a brisk rate. As with many New England and Mid-Atlantic communities, the aging sewer infrastructure is not able to withstand these growing pains adequately. The Township has been actively implementing a sewer system inspection and rehabilitation program to address the infrastructure deficiencies. Deteriorating sewer segments were identified in two distinct neighborhoods. Design documents were prepared to allow utilization of various trenchless pipe and manhole repair methods. Cured-in-place and fold and form alternatives were specified for sewer pipe rehabilitation. Epoxy and cured-in-place methods were specified for manhole rehabilitation. A case study highlighting the lessons learned during construction of the project will be discussed. Issues that had to be dealt with during construction included concrete in a portion of the existing sewer and excessive infiltration. This presentation will include an overview of the planning, investigation, design and rehabilitation construction component of the project.