| Pipe
Bursting
[Replacement]
Also
Called:
• Pipe Slitting
• Pipe Cracking or
• Pipe Displacement
Used
to install:
HDPE
Clay
Concrete
ABS
PVC o
Cast or Ductile Iron**
**
Pipe Genie® is the only bursting system that can
accommodate cast/ductile pipes.
|
Pipe
Bursting is a technique for replacement of existing
pipes. The existing pipe, once burst, becomes the guide
path for the new pipe being installed.
This
technique bursts the old pipe and in so doing displaces
the fragmented old pipe into the surrounding soil. This
creates a hole of roughly the same dimension as the
original. If a larger diameter pipe is to be installed
a larger 'expanding cone' is used to increase the size
of the hole. Once done, the new pipe is pushed or pulled
into position.
A
variation of this method is called 'Pipe Slitting' which
breaks the pipe by longitudinal slitting.
Pipe
bursting is popular in urban areas where congestion
due to existing services sharing the same space under
the surface is a problem. Bursting must be used very
carefully where sub surface crowding could put other
lines at risk due to the pressure of the bursting head.
|
| Slip
Lining
[Rehabilitation] |
Slip
Lining offers simplicity relative low cost. However,
due to its application loss of flow capacity can result.
This technique inserts new pipeline of a smaller diameter
into the defective pipe, and the annulus (space left
between the old and new pipe) is filled by grouting.
A
modified version of slip lining, often called close-fit
lining, makes use of the properties of polyethylene
or PVC to allow temporary reduction in diameter or change
in shape prior to insertion into the defective pipe.
The inserted pipe is subsequently expanded to form a
tight fit against the wall of the original pipe, thus
avoiding the need for annulus grouting as in conventional
slip lining. Temporary reduction in diameter is achieved
either by mechanical rolling or drawing through a reduction
die. |
