Pipe Bursting is a trenchless method of replacing buried pipelines (such as sewers). We break the existing pipe, push it outwards and pull or push a new pipe through. In some cases it can also be used to increase the diameter of an existing pipe.
What it involves
- The process breaks an existing pipe and displaces the fragments outwards while a new pipe is drawn in to replace the old pipe.
- Typical bursting methods include pneumatic, hydraulic expansion or static pull.
- The set-up requirements vary in relation to replacement, pipe diameter, length(s), existing access chamber size, bursting equipment size etc.
- Prepare the manholes to be used.
- Prepare the replacement pipe.
- Set-up the bursting equipment.
- Connect replacement pipe/pipe section.
- Commence bursting and feed pipe/connect pipe sections as appropriate.
- Monitor surface heave as appropriate to your site.
- Complete the pipe replacement and remove the bursting equipment.
- Secure pipe ends and manholes.
- Knowledge of pipe material and condition.
- No connections that cannot be accessed to reinstate (bursting will damage).
- Known ground conditions, including likelihood of concrete surround other obstructions that would hamper pipe expansion.
- Knowledge of acceptable ground displacement/movement tolerable at surface.
- Services, structures and surface finishes above the pipe.
- Pipes 100mm to 1200mm.
When to use pipe bursting
- A very effective trenchless technique for known ground, for runs with no or few connections and with no movement sensitive structures or services above the pipe. If a degree of upsizing is required, this is the best trenchless technique.
- The bursting method can be adjusted according to the available access, the host pipe conditions, diameters and lengths.
How we can help
Pipe bursting is an activity that has a very high failure rate when the people doing it are inexperienced or careless. The McAllister Group possesses the necessary experience and in-house support by a number of specialist partners who have a broad range of equipment and vast experience.
Our approach is to work in tandem with the client and their goals. We always conduct a rigorous site investigation before recommending pipe bursting; depending on the diameters, site situation and most appropriate bursting technique, we will either install a new run ourselves or manage the schedule of works carried out by an appropriate partner.