大坂引水隧洞工程变形监测及稳定性分析  

DEFORMATION MONITORING AND STABILITY ANALYSIS OF DABAN DIVERSION TUNNEL PROJECT

作　　者：王于宝[1] 王晓卫[2] 颜新荣[2] 麻永福[2] 

机构地区：[1]中国矿业大学,北京100083 [2]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《岩石力学与工程学报》2005年第20期3783-3787,共5页Chinese Journal of Rock Mechanics and Engineering

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.

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 

分 类 号：TU454[建筑科学—岩土工程]