A lining system in which a thin flexible tube of polymer or glass fibre fabric is impregnated with thermoset resin and expanded by means of fluid pressure into position on the inner wall of a defective pipeline before curing the resin to harden the material. The uncured material may be installed by winch or inverted by water or air pressure, with or without the aid of a turning belt.
SewerAn underground pipe or conduit for transporting stormwater and/or wastewater. structure owner, specifically the one requesting the inspection work.
See Open CutThe method by which access is gained to the required level underground for the installation, maintenance or inspection of a pipe, conduit or cable. The excavation is then backfilled and the surface restored. See Conventional Trenching..
The capacity of rock to be spalled, ripped, chipped, and broken into smaller pieces to allow the advance of the MTBM. Key properties impacting cutability include the frequency of discontinuities, unconfined compressive strength, tensile strength, hardness
See Face AccessAccess to the location where excavation is taking place, typically through the cutting chamber. MTBM configuration may only allow limited personnel access to the back of the cutter wheel from within the pipe string. An airlock may also be required in the rear of the MTBM to maintain air pressure for counterbalancing earth and groundwater pressures..