Micro-tunnel under the A 671: for Three weeks alone in the underground

With a special machine has drilled the municipal company Eswe supply a 246-Meter-long micro-tunnel under the highway 671 and 14 rail lines. Centimeters of the drill bit reached the twelve-Meter-deep construction pit close to the train station Wiesbaden-Ost his goal. Three weeks earlier the drill had been started in 21 meters depth at the corner of Lower Zwerchweg/ corner of the landfill road.

Oliver Bock

correspondent of the Rhein-Main-Zeitung for the Rheingau-Taunus-Kreis and Wiesbaden.

With speeds of eight to 170 millimeters per Minute, the machine worked by limestone benches. In the case of the drill, it was a remote-controlled "Automatic heading machine Wet extraction" with an outer diameter of 1.5 meters.

a 15 million Euro expensive project

Up to twelve hours daily has been drilled, even on weekends and holidays. The tunnel breakthrough was the culmination of a 15-million-Euro construction project: the construction of a four-Kilometer-long high-pressure gas line, which runs to a length of 300 meters underground.

The new line will increase the security of supply of the gas system in Wiesbaden, Germany, and the delivery for the construction of the power plant in the industrial Park Kalle-Albert ensure this will be connected in September.