cw-6-2i

Contractors World - Intermat Preview 2
Latest Innovations in
Trenchless Technology
Contractors around the world
have recognised the many benefits
that trenchless technology deliver
and as technology advances so
companies such as Tracto-Technik
apply it to new models.
This will be evident on the
TractoTechniik stand at Intermat
2015 with the launch of the
Grundodrill 18ACS, which works
highly effcient in mixed soils as well
as in hardest rock at signficantly reduced
operation costs and construction
times.
The Grundodrill 18ACS works
with a twin tube drill rod consisting
of an inner tube with plug-in connector
and outer tube with Elicon thread.
For bores in rock the “Rockbreaker” steering head with
roller chisel is applied. When drilling, the outer tube steers
the Rockbreaker and the inner tube, which is connected
to the roller chisel, transfers a torque of 2.500 Nm up to
350 rpm directly onto the chisel. This way, it reduces the
amount of Bentonite required to a very small quantity,
keeping the costs for purchase, treatment and disposal
down to a minimum without impairing the performance.
With a Cummins Tier IV compliant 126 kW diesel engine,
consuming less than 10 l/h, and a thrust and pullback
force of 180 kN, it is possible to do standard fluid-assisted
bores up to 400 m length and rock bores up to 300 m
length with an upsizing diameter of 20” maximum. A rod
magazine holds up to 225 m.
Having a working width of 2,3 m and an axis-centre
distance between drilling axis and obstacle of only 1 m
the 15,200 kg unit is also ideal for applications in limited
spaces as for example mountainous regions or inner cities.
Inclination angle is variable between 12° and 30° to give a
wide drilling envelope.
At just 66 dB(A) sound level, the drill is also suitable
for use in sensative areas such as in residential housing estates
or near hospitals. The rubbersised steel track helps
minimse damage to ground surface and also provides easy
traction over difficult ground conditions.
New Pipe Rehabiliation Solution
Intermat will also see the official introudction of the TT
PipeREDUCER. This further extends the application range
of the Grundoburst static pipe bursting system by the ‘Pipe
reduction’ relining technique for the trenchless renovation
of pipes.
The pipe reduction method allows for a PE pipe string
with reduced diameter which adapts to ‘close-fit’ to the
inside of an old pipe wall whilst being pulled through the
host pipe.
A benefit of this method is the fact that the diameter of
the old pipe is only slightly reduced. At the same time the
hydraulic capability of the pipeline is improved.
Due to the close-fit installation no annular space remains
avoiding costly grouting. This method results
in a mechanically robust and new pipe with
an extended service life.
Further advantages of the reduction method
using the TT PipeREDUCER are short construction
times and minimal civil engineering works which
result in considerably lower cost compared to
open construction. Thus the reduction method
provides a reliable and versatile technique for
the economic, close-fit renovation of gas, water
or drainage pipes in need of rehabilitation.
• Tracto-Technik
Contractors World International Vol 6 No 1
Page 41