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河谷区边坡裂隙岩体的渗透性分布规律,对于边坡渗流分析的参数选取有着重要的参考意义。通过分析单一裂隙的渗流规律及河谷地区边坡应力分布特征,研究了在复杂应力条件下及存在边坡卸荷作用时河谷边坡裂隙岩体渗透性随岩体埋深的分布规律,并结合白鹤滩水电站坝址区玄武岩岸坡岩体钻孔压水试验资料,采用表征裂隙岩体渗透性的单位吸水量ω为参数,通过统计分析验证了理论推导的结果。
The distribution of permeability of fractured rock mass in slope area of valley area has important reference meaning for parameter selection of slope seepage analysis. By analyzing the seepage law of a single fracture and the stress distribution characteristics of the slope in the valley, the distribution of fractured rock mass permeability along the rock mass depth under complex stress conditions and the unloading of the slope is studied. The data of borehole pressure test on basalt slope rock mass at the dam site of Baihetan Hydropower Station were used to calculate the unit water absorption ω of permeability of fractured rock mass as a parameter and the theoretical results were verified by statistical analysis.