Pipe bundle ø 360 mm (14?) laid underneath a small river0 pages

TERRA-JET 2808 S
Pipe bundle ø 360 mm (14“) laid underneath a small river
In the little Swiss city Mümliswil the TERRA-JET 2808 S laid a pipe bundle consisting of three pipes
underneath the „Mümliswiler Bach“ (small river in Mümliswil). This pipe bundle consisted of a protection pipe
OD 132 mm (5.2”) for electricity, a protection pipe OD 92 mm (3.6“) for fibre optic and a pressure pipe OD 63
mm (2.5”) for water. The pilot bore had to be reamed in steps up to ø 360 mm (14“). Then the pipe bundle
could be pulled in.
This HDD bore was done by the contractor Candoni from Günsberg. Since many years Candoni is a
specialist for trenchless pipe and cable laying.
The drilling fluid is mixed. Besides the special
Bentonite other additives were used to improve the
quality.
View on to the job site. You can see the
starting and arrival point, the small river flows
in between.
I:\MS\Baustelle\englisch\TJ 2808 S\bau-188en (TJ 2808 S, Rohrbündel ø 360 mm unter Bach verlegt) (2).doc
1/4 MFa-13.09.2012