Intermat Preview No 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 Tracto-Technik stand at Intermat 2015 with the launch of the Grundodrill 18ACS, which works highly efficient in mixed soils as well as in hardest rock at significantly reduced operation costs and construction times.
The Grundodrill18ACS 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 sensitive areas such as in residential housing estates or near hospitals. The rubbersised steel track helps minimise damage to ground surface and also provides easy traction over difficult ground conditions.
New Pipe Rehabilitation Solution
Intermat will also see the official introduction 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.