Geosynthetic Enabled with Fiber Optic Sensors for MSE Bridge Abutment Supporting Shallow Bridge Foundation

摘要

Integrating fiber optic sensors into a geosynthetic reinforcement geotextile isan innovative system for strain and temperature measurement of soil structures.Using this technology allowed for the monitoring of a geosynthetic reinforced bridgeabutment supporting shallow bridge foundations in St. Saturnin, France. Integratingthe fiber optic sensor into the geotextile creates an intimate bond with the soil andallows for an accurate monitoring of civil engineering works. This allows engineersto evaluate the actual safety level and optimize their design or to survey the behaviorof a structure which may be susceptible to change during time. Today, the need forinstrumentation justifies the research and development of more accurate tools that areeasy to install and allow for long term performance. In this context, a new type ofgeosynthetic was developed for civil engineering applications. It combines theperformance of the technical geosynthetic and optical technology for measurement ofstrain in soil and for the survey of foundation and earth construction. This paper willdiscuss the geosynthetic enabled fiber optic sensor system and the case history of itsuse to monitor the bridge abutments for 5 years for the project in St. Saturnin, France.