GRUNDOCRACK™ Set-up
Simple, effective process during the pneumatic pipebursting procedure, the Grundocrack is placed into the host pipe at an entry pit or manhole. A constant tension Grundowinch, based at the exit area pit and attached to the head of the tool, guides it through the host pipe. Continuous percussion from the pneumatic tool fractures the host pipe.
The Grundocrack effectively hammers its way through the host pipe, displacing the fragments into the surrounding soil, while simultaneously pulling the new pipe, usually High Density Polyethylene (HDPE), into place behind it. (For more information on HDPE pipe, visit ISCO Industries, LLC.) Pipebursting is the only trenchless method of replacement that allows for the upsizing of the original pipe.
The Grundowinch plays a key roll in pipebursting operations. The constant tension, variable speed Grundowinch makes adjustments for conditions that affect line speed during operation, providing constant and consistent pulling force and preventing slack from developing in the line. Twin capstans protect the cable and cable drum from extreme stress levels. The Grundowinch essentially guides the tool through the host pipe.
Several factors dictate whether pipebursting is appropriate for the rehabilitation of a failed line. These considerations include host pipe material, diameter, condition, depth, length, new pipe diameter, soil conditions, peripheral utilities and service connections. The Grundocrack can be used to burst fracturable pipes (cast iron, clay, concrete, RCP, ABS and some plastics) with diameters between 4 and 54 inches.
