Trenchless Installation

Microtunneling is trenchless pipe installation by remote-controlled jacking. HOBAS Jacking Pipes have high compressive strength and are of consistent superior quality. Due to the smooth, non-absorbing exterior surface, tight outside diameter (De) tolerances and light weight construction, HOBAS CC-GRP Jacking Pipe Systems experience the lowest jacking loads in the industry.

The pipes' small outside diameter in relation to the inside diameter leads to an array of advantages. For instance smaller machines are required for the pipes, which means lower equipment and lease costs; expenses for construction site and thrust pit preparation can be substantially reduced. Adequate joints and fittings for every application ensure a complete leak-tight system.

Jacking with HOBAS Pipe Systems
HOBAS Benefits - High Compressive Strength
- Smaller Outside Diameter – Lower Machine Cost
- Smaller Outside Diameter – Less Excavation
- Lower Jacking Forces Required
- Angular deflection possible in couplings
- Very long service life of more than 50 years
Supplementary Products - Practical push-to-fit couplings
- Up- / Downstream Pipes for Intermediate Jacking Station
- Lubrication - Injection Nozzles
- Manhole Structures for the Jacking Site

Benefits of Jacking Compared to Traditional Construction

  • No open trenches required – pipes are installed without the general public noticing
  • Towns and landscapes do not suffer from the construction work
  • Falls in water table level, which affect vegetation, can be prevented
  • Due to the tight wall thickness of HOBAS Jacking Pipes relatively small amounts of soil are excavated and removed
  • No special storage areas are needed for materials and equipment
  • Traffic disruption is kept to a minimum
  • HOBAS Jacking Pipes can be installed irrespective of the weather conditions
  • Residents nature and the environment are protected from noise, dirt and vibrations
  • Damage to nature is substantially lower than with the open-cut method
  • Carbon emissions are considerably lower during construction and from traffic, as congestions can be prevented. Find out more

The first project using HOBAS GRP Jacking Pipes and remote-controlled jacking machines was carried out as part of a research project in Hamburg. In 1982, pipes with an outside diameter of 752 mm (length: 2,980 mm, wall thickness: 50 mm) were installed using a modified Iseki microtunneling machine without any problems right from the start. Within a matter of a few decades, CC-GRP Jacking Pipes have gained a firm foothold in trenchless technology and today HOBAS manufactures jacking pipes up to a diameter of 3600 mm (DN 3600).