Quasi-Static Deep Penetration in Clays

by Mohsen M. Baligh, Asst. Prof. of Civ. Engrg.; Massachusetts Inst. of Tech., Cambridge, Mass.,
Ronald F. Scott, (M.ASCE), Prof. of Civ. Engrg.; California Inst. of Tech., Pasadena, Calif.,

Serial Information: Journal of the Geotechnical Engineering Division, 1975, Vol. 101, Issue 11, Pg. 1119-1133

Document Type: Journal Paper

Discussion: Ladanyi Branko (See full record)


Deformations caused by the steady-state penetration of a rigid rough wedge in clay are compared with theoretical predictions. It is found that the mechanism of sharp wedge penetration was consistent with the cutting process assumed by the theory. However, the larger the apex wedge angle the less accurate are the theoretical predictions. The mechanism of blunt wedge penetration is one of compression in which a rigid region of clay moves with the wedge, so that the deformation patterns are difficult to interpret. Measured penetration resistance is in reasonable agreement with the theory. The suitability of plasticity theory to resolve penetration problems is assessed and its deficiencies identified.

Subject Headings: Penetration tests | Clays | Wedges | Statics (mechanics) | Soil deformation | Soil compression | Load and resistance factor design | Steady states | Agreements and treaties

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