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. Sinkholes are common geohazards, frequently responsible for suddencatastrophic ground collapse. Thus, effective monitoring would allow forfurther understanding of the mechanism of occurrence of sinkholes and leadto the development of a potential early warning system to provide an alarmor a warning of incipient col-lapse. In the current study, fiber Bragggratings (FBGs) were used to instrument reduced scale models, simulating asinkhole event. The tests were conducted by embedding optic fiber sensors inthe soil and inducing failure until critical conditions were reached. FBGsensors were manufactured in a single optic fiber cable. The measurements ofsmall horizontal strains were recorded simultaneously and in variouspositions. Failure mechanism was found to relate to the backfill density,and compaction.

Sinkhole collapse propagation studies through instrumented small-scale physical models