Problem
Freeze/thaw cracks and roadbed erosion
Project
Manhole and chimney rehabilitation
Client
Cincinnati Metropolitan Sewer District
Location
Cincinnati, Ohio
Description
Cincinnati MSD has been under EPA mandate to rehabilitate the sewer collection system to correct the problems of infiltration and inflow of groundwater into the system. The upper section of the manholes are cracked and deteriorated due to freeze/thaw cycles. In an effort to stop as much inflow as possible in this area the MSD elected to line only the upper chimney section and the first 12″ of the corbel section of the manhole.
Solution
The Poly-Triplex Liner system, constructed of a non-porous inner membrane between 2-layers of structural fiberglass is saturated and cured-in-place with more than 24,000 psi of flexural strength bonded to the chimney and corbel section.
Benefit
The liner completely stops infiltration of groundwater and ground erosion into the structure in the chimney and corbel section. This significantly reduces the amount of groundwater to be treated as well as prevent further roadbed erosion that has occurred from this area.
Upper Left: Chimney Guard Liner manually lowered into position within the manhole.
Upper Right: Chimney Guard Liner is saturated with a fast-set 100% solids epoxy resin.
Upper Left: Liner is inflated with portable inflation blower and will be held under pressure until the liner is cured.
Upper Right: Chimney Guard Liner is cured-in-place, permanently solving problems in the upper portion of this manhole.
Comments
Cincinnati MSD has currently used Poly-Triplex System in more than 700 of their manhole structures. More than 500 of these were the Chimney Guard product.