小浪底水利枢纽工程2^#明流洞断层开挖  

Fault excavation for free flow tunnel No. 2 of Xiaolangdi water control project

作　　者：张志斌 

机构地区：[1]陕西华源咨询公司,安康张岭725011

出　　处：《西北水电》2003年第1期26-27,共2页Northwest Hydropower

摘　　要：2#明流洞全长1105 m,其中下游洞长108 m,开挖断面为直墙圆顶的城门洞型,尺寸为宽12.4 m,高15.4 m,在桩号为0+472～0+515处有F240断层通过,稳定性极差。断层开挖采用短进尺、弱爆破、强支护、勤监测等施 工措施,成功地完成了施工任务。Free flow tunnel No. 2 is 1105 m long and its downstream section is 108 m. The excavation section is in a reversed U shape 12. 4 m wide by 15. 4 m high. At station No. 0+481, 7 m3 debris collapsed during excavation. Therefore, the principle of short drilling footage, small blasting, strong support and frequent monitoring is adopted for the fault excavation.

关 键 词：小浪底水利枢纽工程 明流洞 断层 开挖 钻爆设计 支护 

分 类 号：TV554.12[水利工程—水利水电工程]