摘要
拟建隧道全长约1221 m,洞体净空(宽×高)为975 cm×500 cm。隧道进、出口边坡稳定性均差,自然状态处于自稳状态,施工开挖过程,极易产生碎落、崩塌等不良地质现象。隧体为全岩隧道,围岩级别为Ⅳ-Ⅴ级,围岩整体稳定性较差—较好。通过评价,隧址区场地稳定较好,较适宜隧道修建。
The total length of a proposed tunnel is about 1221 m,and the tunnel clearance(width and height)is 975×500 cm.Stability of the tunnel’s inlet and exit slopes is poor.With a natural state of self-stability,the slopes are prone to chipping and collapse in excavation and construction.The tunnel is totally made up of rock with the surrounding rock level of IV-V,and the overall stability of the surrounding rock is poor-good.Evaluation shows that the site is stable and suitable for tunnel construction.
作者
王昭祥
WANG Zhaoxiang(The Second Geological and Mineral Exploration Institute,Bureau of Geology and Mineral Exploration and Development of Gansu Province,Lanzhou 730020,China)
出处
《有色金属设计》
2022年第4期109-112,117,共5页
Nonferrous Metals Design
关键词
隧道工程
地质条件特征
稳定性
Tunnel project
Geological conditions
Stability
