| Twenty years ago, we were already performing pioneering work in the development and implementation of procedures for the underground creation of canals via unmanned tunneling under the company name Peter Geisler.Today, we are active in the field of guided tunneling and have an experienced team and modern technology.Tunneling capacity in the ID 250 to ID 1800 category is more than 4000 m per year and growing.
Microtunneling
Creation of canals ID 250 to ID 1600 in microtunneling with hydraulically supported heading face and flushing system by Herrenknecht. Creation of ID 150 to ID 400 canals in microtunneling with Bohrtec microtunneling machines
      | Pipe Tunneling ID 1600
with reinforced concrete pipes within the framework of the harbour development of the city of Leer, 1.BA.
Pipe tunneling below the groundwater table in granular soil with hydraulic support of the heading face and flushing system. |
      | Pipe Tunneling ID 1000
with Steinzug reinforced concrete composite pipe in Minden/Westphalia.
The tunneling took place from starting excavation pits in the shotcrete method of construction, depth up to 12 m. |
 | Know-how brings security
– even to particularly exposed areas.
Tunneling ID 800 with polymer concrete pipes within the framework of the construction of the 4th tube of the Elbe Tunnel in Hamburg under the two remaining driving lanes. |
House Service Connection Tunneling
House service connection tunneling ID 150/200 from starting excavation pits or Bohrtec collector systems.
  | Tunneling of Special Profiles
made of reinforced concrete or polymer concrete (here: egg shape in Hamburg, 1998).
Creation of house service connections as auger bore hole from the pipe. |
 | Tunneling of House Connections
out of collectors starting from ID 1200.
No excavation needed in the connection area to the main sewer.
House connection ID 150, ID 200 made of Steinzug, polymer concrete, PE-HD, PVC... |
Manned Tunneling
Creation of canals in manned pipe tunneling
  | Tunneling of a Box Profile
under the ICE route Hamburg – Hanover under full railway operation and with very little cover.
Ground excavation by hand and pneumatic conveyance. |
Consulting
Consulting for customer and engineering companies on the planning of tunneling work
    | We are happy to assist you with the planning of your construction project.Take advantage of our many years of experience in the field of guided pipe tunneling.The procedure used, depending on the geology and groundwater conditions, can contribute to the success or failure of your planned project. |
 | For a better idea, here is a schematic drawing of a pipe tunneling with hydraulically supported heading face and flushing system – by Herrenknecht.Of the drive heads shown here, the one of the right can be used in rock with rolling knives, the one on the left as standard excavation tool for granular soil. |
|