Site:
Power Plant Seismic Upgrade, Orting, Washington

Problem:
When this Steam Plant seismic upgrade was explored, it was determined that certain layers of soil underlying the plant were liquefiable. The circa 1920 building was supported on shallow footings in some parts and slab-on-grade in others.

Solution:
To abate the soil liquefaction potential, compaction grouting was selected for the interior and exterior of the building. Post-grout testing of the soils exhibited the degree of improvement that was required.