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Título

ASSESSING HOEK-BROWN PARAMETERS FOR CEMENTED MATERIALS: A COST-EFFECTIVE AND TIME-EFFICIENT METHODOLOGY

Resumo

The assessment of the strength behavior of rocks poses a challenge of intricate determination. The Hoek-Brown failure criterion for rock masses stands as the prevailing solution to this quandary and has found application in numerous global projects. However, estimating Hoek–Brown parameters is intricately tied to elaborate and time-consuming tests (e.g., triaxial tests), requiring substantial investments and complex analyses. This paper introduces a novel method for calculating Hoek-Brown parameters and establishing the nonlinear failure envelope for various types of artificially cemented materials, ensuring sample integrity. The proposed approach is then compared with real laboratory data. By utilizing basic tests like unconfined compression tests and Brazilian tests, the method estimates the maximum shear strength of materials in triaxial tests with effective confining pressures up to 400 kPa. The results from the proposed methodology exhibit a precise and conservative fit with the experimental strength results, showcasing the applicability of the approach across a broad spectrum of artificially cemented materials. Importantly, this method does not eliminate the necessity of conducting triaxial tests; however, it enables a reliable evaluation of strength parameters without the need for such tests or other intricate and time-intensive procedures.

Palavras-chave

Hoek-Brown failure criterion, shear strength, ground improvement, laboratory tests

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