Convincing. advantages

Trenchless construction offers an array of compelling advantages from the economic, environmental and societal points of view – and has done so for more than 25 years already:

  • More accurate estimation of costs and their minimisation
  • Less variable schedules
  • Unperturbed continuation of above surface life
  • Minimal noise and minimum vibration
  • Minor disruption to traffic and roads
  • Easy circumvention of existing pipes and cables
  • Simultaneous installation of new and elimination of old pipes
  • Preservation of the flora and fauna
  • Unspoiled ground water
  • No need of ground water control
  • No damage to adjacent buildings
  • Minimisation and prevention of subsidence
  • Minimal earth movement/less traffic flow – reduced environmental damage caused by exhaust emissions, noise, dirt and dust
  • Installation of pipes in heavily built-up areas
  • Crossings of stretches of water and traffic routes of all types
  • Unaffectedness of weather conditions upon construction operations and/or manipulation
  • Safe and swift operations
  • Low energy consumption, saving over 50%
  • Construction costs only slightly affected by depth
  • Minimised CO2 emissions and pollution from fine dust during installation
  • Outstanding quality and safety of the sewer (prolonged service lifetime)

"NO DIG: Why dig trenches when there are better solutions?" thus the welcome message at the homepage of GSTT German Society for Trenchless Technology e.V. There are indeed many good reasons to go for trenchless construction. Some of these have been cited on previous pages. Compared with open construction methods, however, the economic efficiency of trenchless construction plays a vital role in the following areas: apart from direct construction costs (including project costs), indirect costs (which include costs to the community or third-party costs) have also to be taken into account. While the direct costs incurred in using the pipe jacking technique are slightly higher than with the traditional method of open construction, exactly the opposite is true in the case of indirect costs, and this applies in the overwhelming majority of cases.