小断面引水隧洞超前小导管预注浆施工技术研究与应用  

Research and Application of Leading Small Pipe Pre-grouting Construction Technology for Small-section Diversion Tunnel

作　　者：薛小攀 冯秋丰 韩福 李伯平 Xue Xiaopan;Feng Qiufeng;Han Fu;Li Boping(Northwest Water Conservancy and Hydropower Engineering Co.,Ltd.,Xi’an 710199,Shaanxi;PowerChina Northwest Engineering Corporation Limited,Xi’an 710065,Shaanxi;Construction and Operation Bureau of Qinghai Yindajihuang Project,Xining,811108,Qinghai)

机构地区：[1]西北水利水电工程有限责任公司,陕西西安710199 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [3]青海省引大济湟工程建设运行局,青海西宁811108

出　　处：《陕西水利》2022年第6期1-3,6,共4页Shaanxi Water Resources

基　　金：青海省科技项目(2020-SF-138)。

摘　　要：水利工程引水隧洞线路长、断面小、地质条件复杂,开挖施工难度大,安全风险大。为确保施工安全。解决地质难题,推进工程建设,研究总结超前小导管预注浆施工技术的应用原理、工序、工艺、注意事项等内容,通过湟水北干渠扶贫灌溉二期工程一分干第2标段实际应用,顺利通过地质不良洞段与浅覆盖层洞段。超前小导管预注浆措施对围岩超前加固、支护结构稳定、预防冒顶、塌方、掉块效果显著,对隧洞建设、设计、地勘、施工等单位具有重要的参考与应用价值。The diversion tunnel of water conservancy project has long line,small cross-sections,complex geological conditions,difficult excavation and construction,and high safety risks.In order to ensure construction safety,solve geological problems,and promote engineering construction,research and summarize the application principles and procedures of leading small pipe pre-grouting construction technology,Technology,precautions,etc.,through the actual application of the second bid section of the second phase of the Huangshui North Main Channel Poverty Alleviation Irrigation Project,and successfully passed the poor geological tunnel section and the shallow overburden tunnel section.The pre-grouting measures of the leading small pipe have significant effects on the advance reinforcement of the surrounding rock,the stable supporting structure,and the prevention of roof fall,collapse and block falling.It has important reference and application value for tunnel construction,design,geological survey,construction and other units.

关 键 词：超前小导管 预注浆 施工技术 

分 类 号：TV543[水利工程—水利水电工程]