Case Study

Campbell TDR system designed to detect dangerous ground shifts during road repair

Campbell TDR system designed to detect dangerous ground shifts during road repair

CASE STUDY Ohio: Monitoring Sinking Highway When the Ohio Department of Trans- portation (Ohio DOT) was preparing to widen Interstate 77, they discov- ered that part of the highway located over an abandoned underground coal mine was subsiding. To stabilize the roadbed, they decided to backfill the mine voids with cement grout while traffic was maintained on the highway. Due to the potential for additional mine subsidence during remediati

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