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New inclinometer sensors and instruments for primary lining deformation measurements for geotechnical monitoring
After three years of cooperation in R&D with our partners SG Geotechnika a.s. and the Faculty of Civil Engineering of the Czech Technical University in Prague, we present innovative instrumentation techniques and fiber optic instruments for deformation and temperature development monitoring of underground and retaining structures as well as subsoil of constructions. The obtained data provide a basis for evaluation of the structure’s performance and behavior of the rock massif.
The main objectives of our R&D project were to enhance capability of geotechnical monitoring and to develop fiber optic instruments resistant to aggressive environment during construction of underground and retaining structures. The delay in instrumentation was reduced, detailed information about deformation and temperature development could be gathered during primary lining construction. Our key results include:
– A new instrument based on fiber Bragg gratings (FBG) for deformation monitoring of the primary lining of underground structures.
– FBG inclinometer sensor for measurement of deflection curve changes in instrumented boreholes in rock massif and selected geotechnical structures.
– Successful instrumentation and measurements at construction sites, including an exploratory gallery for Metro I.D. in Prague and monitoring of the slope at the Petřín funicular.
– FBG deformation gauge of the root and the tendon of pre-stressed strand anchor.
– Software for evaluation of FBG deformation measurements of primary lining and FBG inclinometer sensor measurements, which allow efficient processing and interpretation of the measured data.
The instruments were successfully tested in the geotechnical laboratory of the Faculty of Civil Engineering at the Czech Technical University in Prague and in the field construction progress and are ready for commercial use. Detailed technical specifications will follow. Contact us for more details at https://safibra.com/contacts/. We will happily share the results of our research, development and innovation with you.
This project was financed with the state support of the Technology Agency of the Czech Republic and the Ministry of Industry and Trade of the Czech Republic under the TREND Program.
