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现行公路隧道围岩分级方法某些围岩级别跨度较大,不能满足实际施工的需要,鉴于此,针对Ⅲ、Ⅳ、Ⅴ级岩质围岩进行了较为全面、系统的围岩亚级分级研究。首先通过数值试验对3种岩质围岩的自稳性进行研究,并根据各围岩的自稳性表现特征进行围岩亚级级别划分,建立围岩亚级分级理论标准,然后结合现场采集的大量围岩样本数据统计分析结果,最终确定围岩亚级分级的判定方法。以上研究对现行公路隧道围岩分级方法起到了细化和完善的作用,同时也可作为公路隧道设计、施工参考之用。
Some of the surrounding rock classification methods of existing highway tunnels have large span of surrounding rock and can not meet the needs of actual construction. In view of this, a comprehensive and systematic classification of surrounding rock sub-grade is carried out for the grade Ⅲ, Ⅳ and Ⅴ rock mass surrounding rock . Firstly, the self-stability of three kinds of rock surrounding rock is studied by numerical experiment. According to the self-stability characteristics of each surrounding rock, the sub-level classification of surrounding rock is established. The theory of sub-level classification of surrounding rock is established. Then, A large number of surrounding rock sample data statistical analysis results, and finally determine the sub-grade rock classification method. The above study of the existing highway tunnel surrounding rock classification method has played a refined and perfect role, but also can be used as a highway tunnel design, construction and reference purposes.