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Comparison of Headcut Advance Testing and Soil Test Results

by 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,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

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 (?_d), unconfined compressive strength (q_u), and the jet index (J_i). 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 | Compacted soils | Soil strength | Compressive strength | Soil tests | Strength of materials | Soil compression

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