摘要
针对锦屏Ⅱ级水电站TBM引水洞及排水洞深部大理岩发生的剧烈板裂化岩爆与非剧烈板裂化片帮2种板裂化破坏现象,通过采集该工程区深部大理岩岩样,采用真三轴岩爆试验设备,对其在不同高应力作用下的板裂化破坏现象进行室内试验。通过对试验过程中发生的各种现象的全面描述和试验结果的分析表明,试验中岩样发生的板裂化破坏现象与TBM开挖隧道围岩的板裂化破坏具有很好的吻合性,未来围岩的主要破坏方式将以板裂化片帮与岩爆为主。围岩板裂化破坏将影响TBM开挖运行,分别探讨掌子面与洞壁板裂化破坏对TBM开挖的影响。
During the tunnel boring machine（TBM） excavation,two types of slabbing failures in these deep-buried marble tunnels are discussed.One is violent slabbing rock burst and the other is non-voilent slabbing and spalling. In order to study the slabbing failure,true triaxial experiments for modeling the rock burst at different in-situ stresses are carried out.Results show that all of the specimens appeared slabbing.The phenomena observed in the experiments are very similar to that at the tunnel site in Jinping Ⅱ hydropower station.The experiment explains basically the tunnel face and tunnel side rock failure phenomena at present,and also displays the main failure types during the TBM excavation in the future.The influence of the slabbing failure at tunnel face and tunnel side on TBM excavation is analyzed and discussed.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第6期1089-1095,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50878009)
关键词
岩石力学
锦屏Ⅱ级水电站
大理岩
板裂化
隧洞
TBM
rock mechanics
Jinping Ⅱ hydropower station
marble
slabbing
tunnel
tunnel boring machine（TBM）
