小型水电站地下洞室群精测爆破控制技术研究

Study on control technology of fine measuring blasting for undergroundcavern group of small hydropower Station

针对特小型水电站导线网,边长、前后视距无法按照相关施工测量规范要求布网,根据本工程地下洞室群开挖特点,提出了导线网在特小半径直角转向中采用灵活的多支点法。打破了导线网技术规范,保证了超短距离洞室开挖贯通精度,解决了超短距离的导线控制问题,达到预期的精度要求,为同类工程提供参考。

For the wire network of extra-small hydropower station,the side length and front and rear sight distance can not be arranged according to the relevant construction measurement standards.According to the excavation characteristics of underground cavern group in this project,the flexible multi-fulcrum method is proposed for the wire network in the ultra-small radius right-angle turning,which breaks the technical specification of wire network,guarantees the excavation accuracy of ultra-short distance cavern,solves the problem of ultra-short distance wire control,and meets the expected accuracy requirements,providing a reference for similar projects.