复杂岩性条件下坝基岩体渗透性特征研究

Study on permeability characteristics of dam foundation rock mass under complex lithology conditions

岩体的渗透性研究是岩体工程的重要课题之一。本文利用钻孔声波测试和钻孔压水试验以及相关的地质编录资料,从岩体的埋深、岩性组合形式和岩体完整性程度三方面分析坝基岩体的渗透性特征,并建立了岩体完整性系数与岩体透水率之间的关系式。研究表明,岩体完整性系数和岩体透水率之间具有对数相关性。研究成果可为岩体渗透性问题研究提供参考。

Research on the permeability of rock mass is one of the important topics in rock mass engineering.In this paper,the permeability characteristics of dam foundation rock mass are analyzed from three aspects,the depth of rock mass,the lithology combination form and the integrity degree of rock mass by using borehole acoustic wave test,borehole water pressure test and relevant geological cataloguing data,and the relationship between the integrity coefficient of rock mass and the permeability of rock mass is established.The results show that there is logarithmic correlation between rock mass integrity coefficient and rock mass permeability.The research results can provide reference for the research of rock mass permeability.