Concrete will crack – that is a fact.However, since concrete constantly shrinks, expands, and often leaks, the use of a flexible polyurethane resin to permanently seal active water leaks is the optimum choice to create a water-free environment.
Due to growth in the Twin Cities area, MCES determined they needed to construct a 50 foot deep sanitary sewer lift station, modify alignment of gravity sewers and add a 9000 foot long forcemain to handle increased volumes.
The focus of the paper is to show the step-by-step progression of a private property I&I reduction program in the City of Wauwatosa. The project included soaker hose rain event simulation, lateral lining and chemical grouting.
These grouting projects were implemented using specifications largely consistent with the new NASSCO grouting specifications. This paper will review the requirements for testing and grouting under which the original work was done.
There have been many debates regarding the long term effectiveness of a sewer grouting approach. ARCADIS selected 12 sewer segments that had been grouted under various sewer rehab projects for which detailed records of testing and grouting were collected.
Chemical grouting has been successfully used for over 40 years to control the movement of groundwater in a wide variety of applications including tunnels, subway systems, sanitary sewers, mines and construction projects.
Over the last 6 years, Malcolm Pirnie has conducted a monitoring program of cured in place mainline liners and lateral liners to assess the affect of various variables on long term liner quality, especially with regard to liner porosity/pinhole leakage.