摘要
依据工程人员经验进行分析的地质调查法、钻探取芯法通常无法对超前地质情况进行准确预报,地质雷达法、地震波反射法等多种物探方法探测后缺乏直接有效的验证。基于此,在斜井掌子面及左右洞身采用长距离超前钻探孔内成像的新技术进行钻孔内部全过程、360°全视角的探测,准确清晰地验明前方地质情况,为后续斜井施工方案提供指导。研究成果为迂回斜井进正洞方案提供了有效支撑,工程应用效果显著,最后总结了超前钻探孔内成像关键施工技术,为相关类似工程参考。
The geological survey method and the drilling and coring method,which are based on the experience of engineers,are often unable to make accurate forecasts of the overrunning geological conditions,and the geological radar method,seismic wave reflection method and other physical detection methods lack direct and effective verification after detection.Based on this,the new technology of long-range in-hole imaging for overhole drilling was adopted at the palm face and the left and right cavities of the inclined shaft to provide a 360°view of the whole process inside the borehole,so as to accurately and clearly verify the geological conditions ahead and provide direct guidance for the subsequent construction plan of the inclined shaft.The research results provide effective support for the plan to enter the main cavern of the meandering inclined shaft,and the engineering application is remarkable.Finally,the key construction technology of in-hole imaging by over-drilling is summarised for reference of similar projects.
出处
《建筑技术开发》
2024年第2期65-67,共3页
Building Technology Development
基金
国家自然科学基金面上项目(51978431)。
关键词
岩溶隧道
突泥涌水
超前地质预报
孔内成像
karst tunnels
mud and water surges
advance geological forecasting
in-hole imaging
