Boone Dam - Observations of LMG Grouting in Clay-Video

Video Transcription

Video Summary

The presentation described PVA’s staged test-grouting program for dam remediation. Initial test-pit trials evaluated grout mixes, delivery methods, and grout-bulb shapes; results emphasized uniform aggregate gradation, the increased mobility from fly ash, and avoiding tight bends in grout lines. A second test area near the dam used instrumentation to assess grout movement and production limits. Testing showed low-mobility grout could displace soft soils and fill voids, but could also transmit pressure over considerable distances, deform nearby ground, and alter seepage patterns. The findings underscored the need for careful instrumentation and strict pressure and volume limits during production grouting.

Keywords

dam remediation

test grouting

grout mix

instrumentation

seepage control