Survey and Positioning Systems

  • Custom-made software

    Over the past few decades, Geocon’s eponymous software application has played a central role in dozens of tunnel immersion operations.

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  • GNSS

    Geocon owns several Trimble GNSS receivers. Thanks to its use of SPS851, SPS551H and SPS461 receivers, the company can guarantee complete accuracy during positioning projects.

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  • Optical measurement system

    Traditional surveying methods involve a survey tower and an access shaft fitted with prism reflectors.

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  • Tautwire system

    The tautwire is an instrument that allows for the reeling and unreeling of a wire that is maintained at a constant tension. The device is able to measure the angles and length of a thin steel cable that is reeled on its drum, and generate position data from these readings via the Geocon software program.

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  • USBL system

    This acoustic system is based on a transceiver and multiple transponders.

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  • Distance sensor system

    In the last phase of the immersion process, the team makes use of sensor probes with a reach of some 40 cm. These probes are used when sealing the joint with a GINA profile.

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  • Tunnel survey and monitoring systems

    Geocon uses various technical systems to ensure the controlled immersion of a tunnel segment. Data measured in this context can be visualised with the aid of the Geocon software application.

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