How does controlled boring work?

The controllable boring system makes a (small) tunnel in the ground with a mixture of water and bentonite by means of rotation, through which hoses are inserted.

When the system has reached the target through the predetermined route and profile (the so-called pilot boring is then complete) the boring head with transmitter (possibly provided with "Roll and Pitch system") is removed and replaced with a reamer, which also works with a mixture of water and bentonite.

Any cables and/or piping to be laid is attached to this reamer. The rods are withdrawn, and the cables and/or piping can at the same time be laid in the now larger tunnel.

Why controlled boring?

1. Controlled boring allows the skirting of all obstacles encountered in the ground. It therefore operates on a "non-destructive" principle.
2. It is able to do this with a minimum bend radius of 12.00 metres in all types of soil which provides sufficient resistance to the bore shoe which forms part of the bore head.
3. The bore head can be followed to a max. depth of 25 metres. Divergence amounts to ±3% of the depth.
4. A reamer diameter of max. ø 1000 mm is possible, so cables and piping with a total fill of ± ø 800 mm can be laid.
   Depending on this filling, the ground situation and material to be used, bore holes of up to approx. 750 metres in length can be achieved.
5. The system works fast and saves costs. The complete boring unit is very compact and can be used with great flexibility in very small spaces.