Geotechnical applications are used where there is a need to monitor and understand ground movement such as in mines or with large geotechnical construction sites. Strain sensor cables are used in most cases. However, there are applications utilizing acoustic sensing to detect and report changes.
Sensor cables are buried in areas of danger, where ground shifts cause a change in fiber strain. Pre-strained cables can be used to detect compression. Acoustic cables are used to detect vibrations caused by motion. Most systems are used where abrupt and significant movements can cause significant damage e.g. rock slides, earthquakes.
Geotechnical applications are the most common of the many in the broader area of geophysical measurement. Solifos has supplied specialized sensing cables and expertise in many other areas including:
Distributed fiber-optic sensing applications are diverse and growing daily. As a globally recognized pioneer in specialty sensor cable design and installation, Solifos is pleased to provide expert advice and consulting for your application.
Global warming has increased the elevation of permafrost zones and the risk of land slides in populated areas. Communities at risk receive early warnings of potential risk and can be evacuated utilizing Solifos’ sensor cables. Large geotechnical and construction projects face similar risks and can be protected by Solifos’ distributed fiber-optic sensing cables.
Critical transport infrastructure including mountain roads and train lines can be protected from falling rocks utilizing Solifos’ sensing cables. In particular, in cases where falling rock impedes the tracks or street in difficult to reach locations, drivers can be notified ahead of time. In this way, Solifos’ simple fiber-optic sensors replace expensive “Geophones” and special communications technologies
Tunnels of all sorts for road traffic, trains or trams are monitored not only for fire risk. Monitoring their structural integrity is also becoming an increasingly important area, in particular for large tunnel projects. Strain sensitive cables can be cemented behind the isolation wall, and when mounted in a parallel spiral indicate changes in 3D-areas.
Hybrid distributed fiber optic sensing cable for strain, temperature and acoustic containing 3 stranded FIMT and a structured PA sheath. FIMTs are freely configurable and usable for up to 1% strain measurementProduct Data Sheet