摘要
“九九”大坂区各比选方案引水隧洞线均穿越第四系中、下更新统(Q f1 g-l2)地层,由于第四系地层为散体结构,国内尚无统一的围岩分类方法及标准,该地层的成洞条件对方案的比选起决定性作用。为此,在隧洞进口成洞条件相对较差的第四系下更新统地层上部布置原型试验洞,通过对第四系地层原型试验洞施工开挖全过程及后期变形监测,了解隧洞围岩的稳定性及变形特性,为隧洞的结构设计、施工开挖、支护等提供科学依据。
All the comparative projects of diversion tunnel line in “nine-nine” Daban area are all through mid and lower Pleistocene strata in the Quaternary. For the granular structure of Quaternary strata, unified classification standard and method have not been established in China at present. The tunneling conditions in these strata play a dominant role in the choice of the design scheme. Therefore, the prototype examination holes are arranged on the top of the lower Pleistocene strata, which have relatively poorer tunneling conditions at the tunnel entry. Based on the monitoring of overall process of excavation and deformation after excavation for the prototype examination holes, the stability and deformation characteristics of the surrounding rock of tunnel are studied; and the result offers a scientific reference to the design and supporting of tunnel.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第20期3783-3787,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
第四系地层
隧洞围岩
变形监测
稳定性分析
rock mechanics
Pleistocene strata
tunnel surrounding rock
deformation monitoring
stability analysis
