Innovative Large-Scale Grout Research Simulating Karst and Hydraulic Conditions-Video

Video Transcription

Video Summary

Eric Manning and Josh described Alabama Power’s long-running grouting program at Logan Martin Dam, where severe karst conditions and a sinkhole prompted ongoing foundation treatment. To improve understanding of grout behavior in site-specific conditions, the team built a pressurized, 30-foot test chamber filled with large rock. Static tests evaluated different grout mixes, while later cross-flow tests simulated water moving through a primary conduit at about two feet per minute and redistributing into fractures.<br /><br />A one-to-one water-cement mix successfully sealed the simulated conduit under suitable conditions. Three later tests failed to stop flow when laboratory temperatures were unusually low, highlighting temperature’s effect on grout performance. The team plans further tests at warmer temperatures and with additional mixes and velocities. The research supports better field decisions, identifies when additives are needed, and helps develop effective, cost-efficient grouting strategies for Logan Martin.

Keywords

Logan Martin Dam

Alabama Power

grouting program

karst conditions

foundation treatment

water-cement mix