摘要
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。
The classification of surrounding rock is rough in the code for design of road tunnels, and it can not satisfy the construction requirements. Therefore, the sub-classification of surrounding rock is studied. Firstly, the rock stability of Ⅲ, IV and V levels is studied by use of numerical methods, and the partition method and the criterion of rock sub-classification are put forward based on the characteristics of rock stability. Then, samples of field data are employed. Finally, the method for rock sub-classification is proposed. The results play a role in the improvement of the surrounding rock classification. It can give reference to the design and construction of tunnel structures.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2009年第10期1590-1594,共5页
Chinese Journal of Geotechnical Engineering
基金
交通部西部交通建设科技项目(2004-318-000-30)
关键词
公路隧道
岩质围岩
围岩亚级分级
road tunnel
surrounding rock
sub-level classification
