Positioning

Positioning ensures precision and reliability in the installation of caissons, tunnels and foundations, using advanced measurement systems for safe and accurate operations.

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With extensive knowledge and experience in surveying, positioning, and dimensional control, IMMONTEC is a renowned name worldwide. We excel in providing precise positional data during complex operations, especially during the immersion of structures.

Globally, IMMONTEC is recognized as one of the top players in this field.

Expert in Surveying, Positioning and Dimensional Control

Supporting a challenging underwater installation operation involves much more than just presenting numbers. Our comprehensive approach includes:

  • Customized Measurement Systems: Tailored to meet the specific needs of each project.
  • Flexible Immersion Options: Whether immersion with or without a measurement mast and/or access shaft.
  • Real-Time Visualization: Live monitoring of all critical sinking parameters, such as winch forces, jacking pressures, ballast water levels, position, depth, and camera images.
  • Remote Control: Managing pumps and actuators of the ballast and hydraulic systems with precision using solenoids.
  • Comprehensive Immersion Monitoring: Keeping track of flow rates, pressures, and density, and employing long-term settlement monitoring active until the rough construction phase is complete.
  • Post-Immersion Monitoring: Continuously checking settlements (manually or automatically), jacking pressures, joint measurements, and air quality.

We ensure precise and reliable data for the successful execution of complex positioning operations, guaranteeing safety and accuracy at every stage. Our expertise and innovative solutions make us the trusted partner for your most demanding projects.

Positioning caisson

Monitoring and positioning of pneumatic caisson

Caisson positioning

Sensors on the sides of tunnel elements

Requirement Analysis

The foundation must be solid. Achieving high accuracy in positioning tunnel elements starts with correct initial assumptions. During the design and preparation phase, we advise on integrating the necessary facilities for immersion into the tunnel elements or caissons. For positioning, we use a combination of our advanced measurement systems. These systems are not only used for immersing the tunnel elements but also for placing foundation tiles and other critical components on which the elements will rest. This ensures precision and stability throughout the entire process.

 

Survey Systems

We employ a variety of advanced survey systems to ensure precision in our operations:

  • Total Station: An optical system using an infrared laser and prisms for precise measurements.
  • Global Navigation Satellite System (GNSS): Satellite-based positioning, also known as GPS.
  • Ultra Short Base Line (USBL): An acoustic measurement system for underwater positioning.
  • Fiber Optic Gyro (FOG): A gyroscopic device that determines angles relative to true north.
  • Inertial Navigation System (INS): Utilizes inertial navigation for accurate positioning.
  • Taut Wire Position System: Calculates position based on wire length and vertical and horizontal angles.
  • Camera Systems: For visual monitoring and inspection.
  • Ballast Tank Levels, Leak Detection, and Control: Monitors and controls pumps and valves.
  • Pressure and Force Measurement: From devices such as winches and jacks.
  • Angle or Tilt Sensors: Determine pitch and roll.
  • Joint Measurement: Measures the distance between the faces of elements during and after immersion.

By leveraging these cutting-edge technologies, we ensure the highest level of accuracy and reliability in our projects. Want to know more?

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Our ExpertisePositioning