Comparison of Headcut Advance Testing and Soil Test Resultsby Gregory J. Hanson, (A.M.ASCE), Hydraulic Engineering Research Unit, Stillwater, United States,
Kerry M. Robinson, (A.M.ASCE), Hydraulic Engineering Research Unit, Stillwater, United States,
Abstract: This paper presents the results of a study conducted in a flume to determine headcut advance rates of two base soils compacted at various compaction moistures and placement energies. The flume is 1.8 m wide, 2.4 m deep, and 29.3 m long. An overfall was formed at the downstream end of the placed soil in the flume and movement over time was monitored in each test. Soil samples were taken to determine moisture content, dry unit weight (γd), unconfined compressive strength (qu), and the jet index (Ji). These values were compared to the headcut advance rate for each test. The results suggest that headcut advance is a function of soil density, strength, moisture, and erodibility.
Subject Headings: Soil water | Soil strength | Soil compression | Compressive strength | Soil tests | Flumes | Compacted soils
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