Fast, Economical, Cone Testing of River Sediments

by Thomas F. Zimmie, Rensselaer Polytechnic Inst, Troy, NY, USA,
Carlos R. Cordon, Rensselaer Polytechnic Inst, Troy, NY, USA,

Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering


The objective of the study reported was to obtain quantitative geotechnical information over many square miles of Hudson River bottom. A hand held cone penetrometer was selected for use. Because the river sediments encountered were generally very soft, a custom made cone, larger than the standard 10 cm**2 cone, was constructed of aluminum, 11. 2 cm in diameter. Tests could be performed in maximum water depths of about 8 m utilizing relatively small and inexpensive boats. The drained analysis of the cohesionless river sediments employs the well known bearing capacity equation which enables the computation of drained shear strength. For cohesive sediments and undrained conditions, the local value of N//c, the bearing capacity factor, varied from 6. 3 to 11. 9.

Subject Headings: Penetration tests | Conical bodies | Economic factors | Rivers and streams | Sediment | Load bearing capacity | Cohesionless soils | Soil strength | Hudson River

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