In-situ culvert rehabilitation : synthesis study and field evaluation.

This synthesis study evaluated culvert rehabilitation (repair) methods involving trenchless technologies that may be appropriate for use in Utah. This report is not intended as a replacement for installation manuals provided by the manufacturers but rather provides a brief description of each method and its installation procedures, and highlights the advantages and disadvantages of each. Segmental lining is cost effective in Utah and the most common method of culvert rehabilitation in most western state highway culverts. Cured-in-place pipe and fold-and-form methods are also common but the costs are higher than segmental lining. The Department of Transportation (DOT) maintenance personnel can often carry out segmental lining, while contractors with specialized skills and equipment are required for all other methods. This report also presents a survey of culvert relining project costs (western states) and a discussion on burial depth limitations and end treatments. The information provided was obtained through a literature review, surveys of various western state DOTs and interaction with the Utah Department of Transportation (UDOT). A flip chart and installation video were developed for segmental lining as part of this study, with the majority of effort coming from UDOT personnel. Table 1 at the end of the report summarizes the main disadvantages, advantages, and limitations for each culvert relining method.