Settlement Mitigation of Large Manufacturing Operation Using Low Mobility Grout-Video

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Video Summary

A steel manufacturing facility built beside a capped landfill experienced methane alerts and up to four inches of settlement. Rather than install micropiles, which would disrupt operations and create stiffness contrasts, the owner selected low-mobility grouting beneath spread footings and selected slab areas. A 2015 test program reduced settlement by nearly a factor of ten; subsequent work treated much of the facility, with minimal interruption and no uncontrolled methane releases. Grout columns were bottom-up, founded on competent shale or sandstone, and monitored for pressure, volume, and movement. Follow-up monitoring showed settlement at a key location had become negligible.

Keywords

steel manufacturing facility

landfill methane

low-mobility grouting

settlement remediation

spread footings