西部水电工程普遍处于高应力和复杂地质环境下,强度参数取值受到岩性多样化、围压效应等因素的影响,引入和使用Hoek-Brown参数取值方法,有助于更好地服务于水电工程实践。对比了Hoek-Brown经验取值方法与水电经验取值方法,介绍了Hoek-Brown经验取值方法中与影响因素分别相关的岩性指标、地质强度指标独立参数的具体取值依据与实现过程,并阐述了与西部水电工程密切相关的实际应用方法,分别进行了锦屏二级水电站、锦屏一级水电站应用验证,证明了Hoek-Brown经验取值方法在西部水电工程中的高适应能力。
Abstract
Strength parameters are affected by lithology diversity, confining stress and other factors under high stress and complicated geological condition of hydropower engineering in western China. Hoek-Brown method to determining parameter values is helpful to the hydropower engineering practice. Hoek-Brown empirical method is compared with hydropower empirical method, and the specific basis and realization process of independent parameters such as lithology indicator and geological strength index which are related to the factors in Hoek-Brown method are introduced. Moreover, practical methods closely related to the hydropower engineering in western China are expounded and are applied to Jinping Ⅱ-stage and Ⅰ-stage hydropower stations for validation. It is proved that Hoek-Brown empirical method is of high adaptability in hydropower engineering in western China
关键词
岩体 /
高应力 /
Hoek-Brown方法 /
强度参数 /
岩性指标 /
地质强度指标 /
锦屏一级水电站 /
锦屏二级水电站
Key words
rock mass /
high stress /
Hoek-Brown method /
strength parameters /
lithology indicator /
geological strength index /
Jinping Ⅱ-stage hydropower station /
Jinping Ⅰ-stage hydropower station
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