Analysis of Pressuremeter in Strain-Softening Soil

by Jean-Herve Prevost, Research Fellow; Norwegian Geotechnical Inst., Oslo, Norway,
Kaare Hoeg, (M.ASCE), Dir.; Norwegian Geotechnical Inst., Oslo, Norway,

Serial Information: Journal of the Geotechnical Engineering Division, 1975, Vol. 101, Issue 8, Pg. 717-732

Document Type: Journal Paper

Abstract: Strain-softening behavior is defined as a gradual loss of shear resistance after a peak strength has been reached. The basic concepts of the theories of elasticity and plasticity are reviewed, and the classical formulation is extended to include analysis of strain softening. A general effective stress-strain-strength model is described, but attention herein is focused on undrained behavior. Closed-form mathematical solutions for stresses, strains, and pore-water pressures around a pressuremeter are worked out, and detailed comparisons are made between the results from strain-hardening and strain-softening behavior. The proposed theory makes it possible to back-figure basic soil stress-strain and strength properties from strain-controlled pressuremeter tests.

Subject Headings: Strain hardening and softening | Stress strain relations | Soil pressure | Soil stress | Shear resistance | Shear strength | Elastic analysis |

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