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          Wireless Monitoring of Anchor Loads, DML Project - Zurich, Switzerland

          
The DML Project
          in Zurich is one of the worlds most exciting and ambitious projects
          executed by the Swiss National Railway Company SBB. The 1.6 billion
          SF project centres around the construction of a new station beneath
          the existing Central Zurich Station and a 5km tunnel which will
          allow trains to travel from north to south without having to
          change direction at Zurich Central Station.

          
The challenge
          is for the new station and tunnel to be built without interrupting
          services at Zurich Central which has 340,000 daily passengers
          and at least 2,900 train services a day. A leading Swiss Geotechnical
          Monitoring firm have been awarded the contract to monitor all
          of the existing infrastructure and buildings being affected by
          the construction project, handling more than 150,000 datasets
          per day.



          

          
Working with
          the Geotechnical company, Mantracourt's innovative T24 radio
          telemetry devices are being used to wirelessly monitor the forces
          exerted upon cable anchors which are holding back concrete retaining
          walls within a construction pit (see image). The pit will be
          the start and end point of the tunnel boring machine digging
          the 5km tunnel and will eventually be 16 metres in depth. 



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August 2009

          

            

              
                
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