摘要
高地应力状态下硬质岩隧道产生岩爆,软质岩隧道产生大变形,在山区隧道建设中会经常遇到,也进行过大量的研究,但关山隧道硬质闪长岩在施工中遇到罕见的、特殊的大变形问题。通过对隧道区地质环境背景、岩石成分、岩体结构面特征、原地应力大小研究,配合理论分析,直观地解释硬质碎裂围岩的变形破坏特征与机理,为采取经济、合理的支护措施提供依据,隧道变形控制良好。
The hard rock tunnel with high geostress may encounter rockburst and the soft rock tunnel with high geostress may suffer large deformation, which happen frequently in mountain tunnel construction. Many researches have been conducted and the large hard flash rock deformation in Guanshan tunnel construction is exceptionally a rare case. This paper intuitively expounds the features and mechanism of deformation and failure of the hard cataclastic surrounding rock mass based on the study of the geological environmental background, rock composition, rock mass structure and characteristics, in-situ stress in the tunnel area and on the theoretical analysis, which provides a basis for taking economic and reasonable support measures to control tunnel deformation.
作者
陈秀义
CHEN Xiu-yi(Lanzhou Railway Survey and Design Institute Co. , Ltd. , Lanzhou 730000, Chin)
出处
《铁道标准设计》
北大核心
2017年第11期56-60,共5页
Railway Standard Design
基金
基金项目:关山隧道围岩变形破坏机理研究咨询服务(天平咨询35号)
关键词
铁路隧道
硬质岩
碎裂
大变形
Railway tunnel
Hard rock
Cataclastic
Large deformation
