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Pressuremeter Correlations for Preconsolidated Clay

by Ray E. Martin, Schnabel Engineering Associates, Richmond, VA, USA,
Edward G. Drahos, Schnabel Engineering Associates, Richmond, VA, USA,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract:

Conventional triaxial compression and consolidation tests are often utilized to obtain parameters for design of foundations. More recently, Menard pressuremeter test results have been used for foundation design. The paper presents correlations of undrained shear strength estimated from the pressuremeter limit pressure and unconsolidated-undrained triaxial tests, the constrained reload modulus from consolidation tests and the pressuremeter modulus, and the preconsolidation pressure and the pressuremeter creep pressure. The factor used to determine the undrained shear strength was estimated to be K//b equals 5. A re-analysis of the Richmond City Hall mat settlement has been performed to confirm the pressuremeter rheologic coefficient alpha equals 1 as suggested by Menard for preconsolidated clay soils.

Subject Headings: Triaxial tests | Consolidated soils | Shear strength | Soil settlement | Soil pressure | Measuring instruments | Soil strength

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