【Key words】 Emeishan basalts; rockmass structural characteristic; Columnar joints basalts; weathering bound; reference surface of high arch dam foundation
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The rock mass structural parameter concept consisting of the geometric and mechanical characteristic parameters being posed and the structural parameter values of rock mass at this site are presented.
文中提出了由岩体结构几何特征参数和力学特性参数所构成的岩体结构参数概念，并提供了三峡工程坝基岩体结构参数值。
The structural characteristic of rock mass plays an important role in rock mass engineering construction, so correct evaluation of rock mass quality is of great engineering significance.
岩体的结构特征对岩体工程施工有着重要影响，因此，正确进行岩体质量评价对工程设计和建设具有十分重要的意义。
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