Stabilization of Collapsible Alluvial Soil Using Dynamic Compaction

by Kyle M. Rollins, Brigham Young Univ, Provo, United States,
G. Wayne Rogers, Brigham Young Univ, Provo, United States,

Document Type: Proceeding Paper

Part of: Geotechnical Engineering Congress?1991


The effectiveness of dynamic compaction for improving collapsible soils was evaluated under field conditions using full scale load tests performed on 1.5 m square footings. Tests were performed on untreated soil and soil stabilized by dynamic compaction at the natural moisture content and after pre-wetting. Particle velocity attenuation was measured. Soil improvement was evaluated using double oedometer testing on 'undisturbed' samples as well as CPT and PMT testing. Settlements were predicted by lab testing and actual settlement was monitored as a function of moisture penetration. Dynamic compaction decreased settlement from 400 mm to less than 30 mm. Pre-wetting showed promise for more effective compaction.

Subject Headings: Compacted soils | Soil dynamics | Soil tests | Soil stabilization | Soil water | Load tests | Soil settlement

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