Abstract:
There are many cases across the Midwest and Rocky Mountain region where large structures have experienced differential settlement due to poor compacted fill or challenging soils, rendering the structures useless for the owners. To allow these structures to operate at full capacity in lieu of rebuilding, stabilization and lifting to an acceptable level is required. In South Dakota, a 105 ft diameter grain bin experienced unanticipated differential settlement in fine grained soils causing the bin to become inoperable. In Utah a 5-story steel and concrete office structure started undergoing differential settlement along one edge that was progressively getting more severe and causing serviceability issues on each floor. This paper will highlight these two case studies in Utah and South Dakota in which Compaction Grouting was determined to be the ideal versatile solution in these two different soil profiles to economically stabilize and lift each large structure.