GRUNDOBURST® Static Pipe Bursting System

The GRUNDOBURST® Advantage

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 the water and gas industries.

Models Six G-series models are available for bursting 4-inch through 48-inch diameter pipe and larger.	Controls User friendly controls make the Grundoburst safe and easy to operate.
Flexible Guide Rod The flexible guide rod helps ensure a smooth installation of the QuickLock bursting rods.	QuickLock Rods QuickLock bursting rods quickly and easily link together. This greatly reduces the amount of time needed to load the rods compared to a standard screw-together stem system.
	Design The Grundoburst is highly powerful, easily transported and offers fast set-up.

What it Does

Burst and replace ductile iron and steel mains, along with all fracturable pipe materials.

How it Works

Pulled by a hydraulic 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 systems. The bladed wheel system is a very "clean" process that requires less power than other static 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.

Features

The Grundoburst static pipe bursting system is extremely versatile. There are eight models available ranging in pullback force from 60,000 lbs. to 650,000 lbs. Grundoburst models are designed for bursting 4-inch (101-mm) through 48-inch (1,219-mm) pipes and larger.
Patented Quicklock bursting rods are linked together not threaded. This saves time, prevents twisting and extends the life of the cutter head over threaded bursting rods
In addition to steel pipe, several cutter head configurations are available for splitting VCP, PVC, ACP, cast iron and more.
Grundoburst can pull in a variety of replacement pipe, including polyethylene, PVC, and ductile iron.

Cost Savings

Burst and replace pipe substantial lengths of existing pipe in one step
Grundoburst Quicklock rods save time, increase safety and reduce cutting head wear
Minimal disruption to traffic, buildings and other utilities
Avoids sizable surface damage and costly restoration required for old trenching methods
Accelerated project completion timeline
Easy to set up and operate
Minimal crew size

Multiple Product Pipe Options

Choose Your Pipe The Grundoburst system is able to utilize a wide variety of product pipes. In addition HDPE, the Grundoburst system is capable installing segmented or section pipes like ductile iron and VCP as well as fusible PVC and more.
Sectional Pipes & Cartridge Method 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.
How it Works: Restrained Joint 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 bursting process as the pipe string progresses.
How it Works: Non-Restrained Joint 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. Common Pipe Materials Fusion Welded HDPE AWWA C-906 Fusion Welded PVC AWWA C-900 & C-905 Restrained Joint Ductile Iron Pipe AWWA C-150 Non-Restrained Joint Ductile Iron Pipe AWWA C-150 VCP “NO-DIG” Jacking Pipe Restrained Joint PVC pipe AWWA C-900 and C-905 Steel ABS Cast Iron No Hub Soil Pipe Cast Iron Bell & Spigot Soil Pipe