The self-contained, hydraulically operated Grundoburst static Pipebursting® procedure system makes bursting ductile iron and steel pipe possible. With such powerful capabilities, the Grundoburst is having a tremendous impact on pipe rehabilitation in the water and gas industries.
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Burst and replace ductile iron and steel mains, along with all fracturable pipe materials with static pipe bursting equipment.
Pulled by a hydraulic pipe bursting unit, the cutter head’s unique bladed cutting wheel design is an essential part of the Grundoburst’s success. The bladed wheels actually split the host pipe instead of ripping or tearing it like single fin-type static pipe bursting systems. The bladed wheel system is a very “clean” process that requires less power than other static pipe bursting systems and helps prevent potential damage to the product pipe. An attached expander spreads and displaces the split pipe into the surrounding soil while simultaneously pulling in the new pipe.
Shows how the Grundoburst works.
The Grundoburst is able to utilize a wide variety of product pipes. In addition to HDPE, the Grundoburst system is capable of installing segmented or section pipes like ductile iron and VCP as well as fusible PVC and more.
Segmented pipe is assembled one joint at a time in a “cartridge loading” process. Because of similarities between a rifle cartridge providing bullets to the rifle chamber and the segmented pipes being lowered and assembled in the launch pit. It is well suited for locations where available space for pipe lay down is not available.
Both restrained joint and non-restrained joint pipes can be used. Each type requires a different approach. Installing sectional pipes with restrained joints requires a specific bursting head to connect to the product pipe and then to the static pipe bursting tooling. Nothing additional is required. Subsequent sections of the restrained joint pipe are assembled during the pipe bursting process as the pipe string progresses.
Sectional pipe with non-restrained joints, however, requires a little different approach. Because the joints are not restrained, something needs to hold to push them together and then hold the assembled pipe sections in compression as they are installed. Quicklock style bursting rods and a specially designed cylinder pack provide the solution. As a new section of pipe is added to the pipe string, the cylinder pack (squeezer) and pressure plate push and hold the pipe joints together while the bursting head is pulled forward through the old pipe. Once that section of pipe is installed, the bursting process stops, the cylinder pack and pressure plate are withdrawn and the process repeats.
Static Pipe Bursting at Work
Read all about static pipe bursting projects. Click on the project articles below.
The Incline Village General Improvement District (IVGID) is the quasi-public agency that handles public works services for the areas commonly referred to as Incline Village and neighboring Crystal Bay, both located on the North Shore of Lake Tahoe in Nevada.
The City of Duluth, Minnesota, is facing a problem familiar to many municipalities around the country, an aging and slowly failing infrastructure. The issue has made itself known in the city’s water services area through multiple water main breaks every year.
The problem is the same for many municipalities and public utilities, system infrastructure is aging rapidly, but the need to continue to provide value to customers, in terms of rates and consistent services, has to be maintained. Ignoring the problem or providing a Band-Aid solution to the problem isn’t going to help anyone long term.
Additional Information: TT Technologies’ Static Pipe Bursting Tool
G Series consists of the 400G, Mini-400 G, 800G, 1000G, 1250G and 2500G models. The G-Series Grundoburst models are equipped with Quicklock bursting rods.
TX Series consists of the 30TX and the 50TX Grundoburst models. The 30TX and 50TX have push/pull rods.
This product is covered by the following US Patent No. 7,434,315; 7,698,974; 7,448,829; 8,109,694,
and Canadian Patent No. 2539515, and 2911994.
