岩体块度特征是岩体完整性评价的重要指标, 通常用岩石质量指标RQD来表征。但是RQD是有不足之处的, 岩体基本块度的概率分布、块度百分比、RQDt、块度指数RBI等参数是描述岩体块度特征的重要补充, 它们更全面地、更深入地表征了岩体的完整性, 丰富了岩体质量评价的定量指标。本文以金沙江下游溪洛渡水电站工程坝基岩体块度调查统计资料为基础, 对岩体基本块度的概率分布、块度百分比、RQDt、块度指数RBI等岩体块度特征进行了深入研究。
The characteristics of rockmass block are the main indexes, which are usually represented by RQD. But RQD has some disadvantages. The probability distribution of basic rockmass block, block percentage, RQD t, and rockmass block index (RBI), as the important supplements to defining the rockmass block, are also used to describe the characteristics of rockmass block, which are representative of the rockmass integrality more allsidedly and effectively and enrich the assessment system of rockmass quality. Based on the investigation and statistics of the rockmass block at dam foundation of Xiluodu Water Power Plant Project in the downstream of Jinshajiang River , the rockmass block characteristics, such as the probability distribution of basic rockmass block, block percentage, RQD t and rockmass block index (RBI), were deeply studied.