摘要
隧洞围岩稳定分析对工程设计与施工十分重要。蕉溪岭隧洞是湖南椒花水库供水工程的控制性工程,具有地质条件复杂,穿越多条断层带、浅埋段和破碎带,富水层多的特点。案例通过对蕉溪岭隧洞工程地质和水文地质进行分析,采用轴变理论与实践相结合的方法对隧洞围岩片帮和冒落极限高度进行预测,进而确定隧洞各段的支护设计。结果表明,根据围岩类型确定喷混凝土厚度和锚杆尺寸,结合地下水状况确定灌浆措施,效果较好。案例结果有助于为同类项目工程设计与施工提供科学参考。
The stability analysis of tunnel surrounding rock plays an important role in both engineering design and construction.Jiaoxiling Tunnel is the controlling project of water supply project of Jiaohua Reservoir in Hunan Province.It has the characteristics of complex geologi⁃cal conditions,passing through multiple fault zones,shallow buried sections and broken zones,and rich water layers.Based on the analysis of the engineering geology and hydrogeology of Jiaoxiling Tunnel,this case adopts the method of combining axial strain theory with practice to predict the limit height of spalling and caving of surrounding rock of the tunnel,and then determines the support design of each section of the tunnel.The results show that it is better to determine the thickness of shotcrete and the size of anchor rod according to the type of sur⁃rounding rock,and to determine the grouting measures in combination with the groundwater condition.The case results are helpful to provide scientific reference for the design and construction of similar projects.
作者
龚曙晖
喻玺
陈光辉
庾江华
GONG Shu-hui;YU Xi;CHEN Guang-hui;YU Jiang-hua(Water Conservancy Bureau of Ziyang District,Yiyang 413001,Hunan Province,China;Hunan Jiaohua Water Conservancy Hub Development and Construction Co.,Ltd,,Changsha 413000,Hunan Province,China;Hunan Baige Water Conservancy Construction Co.,Ltd,Changsha 410007,Hunan Province,China)
出处
《中国农村水利水电》
北大核心
2024年第1期75-78,共4页
China Rural Water and Hydropower
关键词
椒花水库
隧洞
围岩稳定
Jiaohua reservoir
tunnels
surrounding rock stability
