Pipe grinding is something Hadlee and Brunton have been doing for over 15 years. Pipe grinding involves the drill being inserted into an existing pipeline, once in place a grinding head is attached to the front of the drill rod along with the new pipe to be installed. The existing pipe is then ground out and the new pipe pulled into position at the same time.
We specialize in replacing live sewer mains where we can replace over 500m at a time and have all the house laterals connected within a day.
Hadlee and Brunton have recently completed several large diameter grinding shots in Christchurch in the wake of the earthquake.
The advantages of pipe grinding over pneumatic pipe bursting are:
Less noise and vibration
Less risk of the ground humping as you are boring a new hole and grinding and floating out the existing pipe as opposed to cracking and displacing the existing pipe into the ground.
You don't risk damaging the pipe with broken shards of the existing pipe
The annulus around the pipe is filled with drill mud so there is no risk of voids