Effctive Stress Interpretation of In-situ Tests

by Yudhbir, Indian Inst of Technology, Kanpur, India,
A. V. S. N. Prakasa Rao, Indian Inst of Technology, Kanpur, India,

Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering


Significant differences in terms of load-settlement curves obtained from Plate Load Tests (PLT) and q//c profiles obtained from Static Cone Penetration Tests (SCPT) at two sites with different ground water table conditions have been reconciled using effective stress approach to interpret the in-situ test data. Tests were conducted at different times of the year in alluvial soils at sites subjected to varying annual ground water table fluctuations. The SCPT and PLT test data have been interpreted in terms of effective stresses (N. Janbu's Method) and the shear strength parameters thus obtained have been compared with the triaxial undrained tests on undisturbed block samples. Typical values of the ratios E//u/S//u, E//u/ sigma //o and m//v sigma //o have been evaluated.

Subject Headings: Field tests | Penetration tests | Triaxial tests | Load tests | Stress analysis | Static loads | Groundwater | Soil strength

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