水利工程中的柱状节理岩体分类及质量评价

Classification and quality assessment of irregular columnar jointed basaltic rock mass for hydraulic engineering

在总结国内外水利水电工程涉及柱状节理岩体工程问题的基础上,根据我国拟建的白鹤滩水电站工程不规则柱状节理岩体现场勘测和测试结果,对柱状节理岩体的分类方法进行了探讨,提出了柱状镶嵌块状结构和柱状镶嵌碎裂结构的分类方法。应用岩体质量评价的RMR法和GSI法对白鹤滩水电站两类柱状节理岩体进行了分析,并与美国汉佛德玄武岩核废料埋藏工程柱状节理岩体分类实例进行了对比。研究表明,RMR法和GSI法能较好地反映白鹤滩柱状节理岩体的工程力学特性。

The data of hydropower projects involving the problem of columnar jointed rock mass in China were gathered and analyzed. On this basis the classification and quality assessment of irregular columnar jointed basaltic rock mass were investigated according to the site survey and in-situ tests results for the Baihetan Hydropower Project, China. The appropriate rock mass classification method was discussed and the classification method for columnar mosaic blocky structure and columnar mosaic cataclastic structure were proposed. The RMR and GSI rock mass quality assessment methods were applied to analyze these two kinds of jointed rock mass and compared with the result of the method applied to the Hanford Basalt Waste Isolation Project, USA. The results show that the RMR method and GSI method can well describe the engineering mechanical properties of irregular columnar jointed basaltic rock mass in the Baihetan Hydropower Project.