Directional drilling with optical control

 »Accurate implementation and guaranteed precision even for longer bores in the most demanding terrains.«

We present a new horizontal drilling method using optical control. The technology is suitable for construction and rehabilitation of sewers. Its advantage is exceptional accuracy.

Can be used for:

  • longer sewers
  • water mains
  • cable conduits

Types of soil
all soil types, categories II to VII

Purpose

  • metal pipes
  • polyethylene pipes
  • polypropylene pipes
  • concrete pipes
  • polyester pipes

Diameters
Implementation of diameters from f 110 mm to f 900 mm

This technology has many advantages over other known technologies:

  • Bore diameter up to f 900 mm
  • Bore length up to 150 m
  • Accuracy +/- 2 cm per 150 m
  • Reliability of tracking
  • Implementation of bores in all types of ground, including rock
  • Possibility of installing protective metal pipes

Possibility of direct installation of sewage pressurised pipes, without protective metal pipes. Installed pressurised pipes may be polypropylene (Hobas), polyester or polyethylene.

Implementation of subsurface drilling consists of three phases:

Phase 1
Production of pilot bores Ø 114 mm. We can control and monitor the bore with an accuracy of +/- 1 cm per 150 m. The camera itself detects changes in elevation of 0.001 mm. As a result, the machine is extremely accurate. We have various drill heads available, depending on the type of ground, including rocks, to be drilled. The method of implementation can be seen in the diagram below.

Phase 2
After completing the pilot bore, an adapter for the desired diameter of drilling is installed on the pilot rods, and drilling of this diameter begins. The drilled material is transported to the entrance pit at the drill. In very difficult terrains, bentonite is added to the bore, serving to reduce the pressure on the head. The method of implementation can be seen in the diagram below.

Phase 3
After completing the bore, we can decide to leave the pipe as protection for media cables, or to remove the protective pipe from the bore at the same time as ramming the new sewer, polypropylene, gas or polyester pipes.