Challenge

Following Tropical Storm Debby, a portion of Mariner Blvd. between Claymore and Little Streets collapsed. The massive amount of rainfall triggered several sinkholes on Mariner Blvd near Little St. Hernando County temporarily backfilled the depressions and repaved the areas.

Solution

Professional Service Industries Inc. (PSI) was contracted by Hernando County to determine if the underlying soils were stable. PSI investigated 2) areas North of Little St. and 1) area W of Mariner Blvd on Little St. PSI determined that sinkhole activity was present and formulated a repair program. PSI recommended compaction grouting was needed to stabilize the deep soils at the 3) areas. LRE Foundation Repair Inc. was contracted by Hernando County to remediate the sinkhole activity. Utilizing PSI recommendations and monitoring of the project, LRE preformed compaction grouting at the 3) areas.. This was accomplished utilizing 23 grout points to an average depth of 72 feet and 708 CY of grout.

Project Summary

Geotechnical Engineer: Professional Service Industries Inc

Compaction Grout: 23 points to an average depth of 72 feet with a total of 708 CY of grout.

Owner: Hernando County

Contractor: LRE Foundation Repair Inc

AREA OF DROPOUT

AREA OF DROPOUT

COMPACTION GROUT BEING PUMPED

COMPACTION GROUT BEING PUMPED

INJECTION POINT BEING PUMPED

INJECTION POINT BEING PUMPED

MONITORING GROUND HEAVE

MONITORING GROUND HEAVE