Monitoring Forces in Tunnel Sections with Force Meters and DAQ Systems
Understanding structural loading for safe and sustainable tunnel infrastructure
In complex infrastructure projects such as tunnels, it is crucial to continuously monitor structural loads. In cities such as Amsterdam, Antwerp, Brussels and Rotterdam tunnels are used intensively and exposed to dynamic forces. The use of force meters, linked to DAQ systems (Data Acquisition Systems), provides essential data on the loading conditions of tunnel sections – from segment connections to foundation structures.
What are dynamometers and how do they work in tunnels?
Force meters, also called load cells, measure forces such as compressive, tensile or shear loads on structural elements. In tunnels they are used for, among other things:
- Wall anchors
- Segment connections
- Support structures
- Injection points and temporary stamps
In combination with a DAQ system the forces are recorded, analysed and visualised in real time. This creates a complete picture of the structural integrity during and after the construction phase.
Why force measurements are essential in tunnel construction and management
Tunnel sections are subject to complex forces, such as:
- Ground pressure and groundwater pressure
- Road tax
- Thermal expansion
- Constructional stresses during installation
Failure to detect overload in time can lead to structural damage or reduced service life. Monitoring with force meters makes it possible to:
- To verify design hypotheses
- Detect deviations in real time
- Minimizing risks of failure
- Planning inspections and maintenance in a targeted manner
The role of DAQ systems in force monitoring
DAQ systems provide reliable data collection and continuous monitoring. In combination with force gauges they offer:
- High measurement accuracy (even with small force changes)
- Time-driven or event-triggered logging
- Direct alarm notifications when threshold is exceeded
- Data integration with tunnel management systems
These solutions are used, among other things, in the North/South Line (Amsterdam), Liefkenshoektunnel (Antwerp) and underground infrastructure in Liège en The Hague.
Customized force monitoring for new and existing tunnels
Depending on the type of tunnel and the environmental factors, various force measurement techniques can be used, such as:
- Pressure transducers in grout or concrete elements
- Axial load cells in struts or frames
- Rings with integrated sensors for prefabricated segments
Our systems are suitable for both temporary measurements during construction and permanent structural monitoring.
Ready for reliable monitoring of your tunnel construction?
We deliver and implement advanced force meters and DAQ systems for monitoring forces in tunnels. Our solutions meet international standards and are tailored to local project requirements in the Netherlands and Belgium.
Dexman, for all your Power Meters
We at Dexman know better than anyone that the right information is the most important thing. Because if a measurement is not correct, the solution is of no use to you. This applies not only to the solutions we offer, but also to the way in which we communicate. At Dexman, we stand for quality, service and solution orientation. In this, it is important to provide the right information, offer a good solution and be honest with each other.
Dexman is a supplier with a wide range of load cells, weighing platforms, pallet scales, crane scales, force sensors, torque meters, measuring amplifiers, pressure sensors en displacement sensors. You can contact us for standard versions, but also for custom-made components and complete weighing solutions. The choice of the right components usually starts with extensive advice.
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