Liquid Level Settlement Cells
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This type of system allows for accurate real-time measurement of structures for vertical movement, be it either settlement or heave. Typical Applications include monitoring of buildings, tunnels, excavations, railway , bridges , jet , frac and compensation grouting zones.
This system is especially adapted to an environment where conventional survey techniques would not be possible. Structures that are located in surroundings which contain a high risk to the personal safety of individuals (such as confined spaces, risk of collapse, hazardous gases, etc.) benefit from this type of system.
Additionally, a building that is considered structurally sensitive to vertical movement would benefit in obtaining real-time data from this system. Series of alarms can be activated if a pre-set trigger limit is reached.
Getec have instaled in the region of 1200 cells for the Crossrail project alone in basements, tunnels and protected properties. We are skilled in the effective design of systems, the installation and commisioning of systems.
Hydrostatic, stationary pressurised liquid level gauges have long since been used successfully for the continuous determination of relative height changes in structures and components. These essentially consist of multiple sensors connected through piping or hose systems which measures changes in the height of the monitored object.
With the GeTec – Pressurised Liquid Level Gauge, precision pressure sensors at the individual measurement points record changes in the hydrostatic pressure from a reference measurement point. These changes in pressure are converted into height changes. The following illustration provides a schematic presentation of the functional principle.
The especially small size of the measurement point as opposed to fill level liquid level gauges also allows installation in conditions with severe space constraints. The pressurised liquid level gauge registers height changes up to 200 mm and has a system accuracy of 0.3 mm for the height differences measured. The dynamic system function with brief relaxation times and a fast system for data acquisition, archiving and visualisation allows the use of the system as a control element in complex safety measures for construction technology.
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