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Creep parameters of rocks on an engineering scale

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Abstract

Vertical shafts of 137 cm diameter were excavated to measure creep deformations of carbonate shale, weathered limestone and tuff. Changes of diameter at successive time intervals were recorded under constant, radial pressure. Three typical models were chosen for a regression analysis of the experimental data and their fitness were compared to one another in a statistical approach.

The introduction of a steady state flow term improves the data fit considerably, and the power law was found to yield an even better result. It was also determined that rock masses in the field contain numerous discontinuities which increase the plasticity of the three types of rock tested. The viscosities determined in-situ were found to be much lower than those derived from small intact specimens by up to several orders of magnitude.

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Authors and Affiliations

  1. Rogers/Pacific Corporation, 94523, Pleasant Hill, CA, USA

    Han-Ping Chin & J. David Rogers

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  1. Han-Ping Chin
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  2. J. David Rogers
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Chin, HP., Rogers, J.D. Creep parameters of rocks on an engineering scale. Rock Mech Rock Engng 20, 137–146 (1987). https://doi.org/10.1007/BF01410044

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  • DOI: https://doi.org/10.1007/BF01410044

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