摘要
地下岩溶发育会给铁路工程的施工和铁路安全运行带来巨大的安全隐患。为了探查某铁路线灰岩区路基段落地下岩溶发育情况,应用高密度电法、跨孔电磁波CT、孔内电视法等综合物探技术手段在铁路路基勘察设计阶段中进行岩溶探测工作。高密度电法探测出多个大范围岩溶发育异常区,孔内电视直观准确地探查出岩溶的深度和规模,跨孔电磁波CT方法探查出岩溶的延伸发育情况,3种物探方法由面到点探测,成果相互验证,优势互补,避免了单一物探方法成果的多解性,取得了较好的岩溶探测效果。应用综合物探方法基本查明了该路基段落内岩溶发育分布情况,经过钻孔验证,结果表明综合应用物探方法在铁路岩溶勘察中具有广泛的运用前景,可以为铁路设计施工提供详实的勘察资料。
The development of underground karst brings huge hidden danger to the construction of railway engineering and the safe operation of railway.In order to explore the development of underground karst in the limestone section of a railway line,we applied the high-density electrical method,electromagnetic wave CT and borehole television method to detect karst in the stage of railway subgrade and design.The high-density electrical method has detected several large areas of abnormal karst development.The borehole television method can directly and accurately detect the depth and scale of karst.The electromagnetic wave CT can detect the extension and development of karst.The three geophysical exploration methods are from surface to point,and the results are mutually verified and complementary,avoiding the multiple solutions of single geophysical exploration methods,and achieving better karst detection results.The distribution of karst development in the subgrade section is basically detected by the integrated geophysical prospecting technology.The drilling results show that the integrated application of geophysical prospecting technology has a wide application prospect in railway karst investigation,and provides detailed investigation data for railway design and construction.
作者
张业
Zhang Ye(China Railway Fifth Survey and Design Institute Group CO.,LTD,Beijing 102600,China)
出处
《工程地球物理学报》
2021年第5期738-743,共6页
Chinese Journal of Engineering Geophysics
关键词
岩溶勘察
综合物探:高密度电法
跨孔电磁波CT
孔内电视
karst exploration
integrated geophysical prospection
high-density electrical method
electromagnetic wave CT
borehole television
