90% of all of the pipe bursting in North America is completed using a pneumatic system. Grundocrack has replaced more than all other pipe bursting systems combined. Superior quality materials and unparalleled experience combine to form Grundocrack the most successful system for the Pipebursting® procedure of all time.
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Burst and replace 4-inch through 54-inch diameter water, sewer, gas and electrical lines. Failing pipe can be replaced with same size or larger diameter pipes.
A constant-tension Grundowinch, specifically designed for pipe bursting applications, guides the tool through failing pipe. The Grundocrack percussive action bursts the existing pipe. An expander displaces remaining fragments into the surrounding soil. New product pipe is simultaneously pulled in behind the Grundocrack pipe bursting tool.
Each tool is effective in bursting a wide range of pipe diameters through the use of a variety of expanders. For replacing lateral connections, there’s a Grundocrack tool that is small enough to be launched from the confined space of a manhole. The Grundocrack can pull in a variety of replacement pipe, including polyethylene, PVC, and fiberglass.
Additional Information: TT Technologies’ Pneumatic Pipe Bursting Process
This product is covered by the following US Patent No. 7,578,636, and 7,384,214.
Pneumatic Pipe Bursting
Check out recent pneumatic pipe bursting projects! Click on the bursting project features and see what’s happening in the field.
J. Fletcher Creamer & Son, Inc. and Spiniello Companies are two of the most recognized utility contractors in the North America. Each company has its own tools, equipment and depth of experienced employee resources.
The city of Eureka, California is nestled in Humboldt County on California’s North Coast, home to the redwood forest and just a short drive north of San Francisco. People travel from throughout the United States to enjoy and take in the area’s many attractions and outdoor activities.
Portland Utilities Construction Company (PUCC), Portland, Tenn., is one of the most experienced pipe bursting contractors in the United States. They have completed 600,000 liner feet of pipe bursting, 30,000 feet of that in the 18-inch diameter and greater range.
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Each tool is effective in bursting a wide range of pipe diameters through the use of a variety of expanders. For replacing lateral connections, there’s a Grundocrack tool that is small enough to be launched from the confined space of a manhole. The Grundocrack can pull in a variety of replacement pipe, including polyethylene, PVC, and fiberglass.
If a tool finds a collapsed section of host pipe, a front expander can lead the tool off track and could snap the winch line. Grundocrack tools with rear expanders are much more likely to stay inside of the host pipe.
When a front expander encounters sediment in host pipe it can lift the tool off course. Grundocrack tools equipped with a rear expander are a lot less affected by sediment since the majority of the tool is already inside the host pipe. The tool can then act as a guide to assist in maintaining accuracy and grade, while the bursting is left to the rear expander. It is recommended to clean old lines before all bursts.
Often, tools are unable to navigate bends with a large front expander. Smaller Grundocrack tools with rear expanders are able to better navigate gentle bends in host pipe. A schnoze guiding head is also effective when used with rear expanders.
Sometimes a point repair clamp causes stoppage of a burst because the front expander is too large to gradually spring the clamp open. A rear expander allows the use of a larger, more powerful Grundocrack tool that can still fit within the host pipe to provide the gradual splitting action required to conquer point repairs.
In a successful job, old pipe must be compacted outward as it is being burst. However, certain types of soils and host pipe materials, or upsizes of more than one pipe size, may cause a front expander to “push” pipe well ahead of the pneumatic tool, rather than burst from the inside out. In severe cases, pipe pushing may cause blockage and possibly stalling of the tool. A Grundocrack tool equipped with a rear expander and a guiding head schnoze works well to keep the burst working from the inside out, compacting pipe fragments outward.
When it comes to pipe bursting knowledge, TT Technologies comes through first. In any pipe bursting job, the tool/expander configuration can mean the difference between success and failure. That’s why TT offers the most expander choices available and the most launch/exit options. Better yet, we know what works best. Let TT’s 35 years of trenchless experience guide you through your next burst.
