technique allows the City to replace utilities without
disturbing surface structures. Pipe bursting employs
high-powered piercing tools with special bursting heads to
smash through old service lines while pulling in new
replacement lines. Most important, it can be done without
affecting expensive surface structures.
has several distinct advantages over open-cut trenching and
other trenchless rehabilitation methods. First, it’s easy
on adjacent utilities because it follows the existing pipe
path. Second, pipe bursting can be used to increase a
system’s capacity by upsizing the service line; cured
in-place and sliplining cannot. Third, since pipe bursting
is trenchless, there is a minimum of excavation required.
This allows you to work in congested areas without hampering
normal traffic flow. Finally, pipe bursting eliminates the
dollars and hours spent on restoration.
The process is
complicated, but to put it in simple terms: after a sewer
pipe is selected, one hole is dug and a section of the line
is cut away, then a cable is ran through the pipe from a
downstream manhole, a hammer head mole is attached to the
cable and a continuous joint of pipe is then attached to the
mole, the cable is then pulled threw the existing line
breaking it away and replacing it with the new