The report discusses a demonstration of dynamic compaction on a highway in Interior Alaska. The demonstration was an attempt to re-consolidate embankments which had settled and loosened due to the progressive thawing of ice-rich permafrost soils. The objective was to reduce future road maintenance costs and to improve ride-ability in historically troublesome areas. A 10 ton weight was dropped by a crane, typically from 25 ft. Three sites were treated. The consolidation produced varied between 2.5 in. and 7 in. Typical costs for this work in Alaska are estimated to be $9 - $12 per sq yd. Extended observation will be required to determine the cost effectiveness of the demonstration. Calculations indicate, however, that the technique may be cost effective at localized areas with severe problems.
The use of nuclear methods for compaction control is increasingly problematic for state highway agencies. Regulatory and safety issues have prompted a...
In this study, researchers devised a scheme for calibration of earth pressure cells to observe their response to various loading configurations and to...
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United States Department of Transportation
[PDF-1.65 MB]
