北江大堤石角段同位素综合示踪探测管涌研究

Study on Piping Detection with Synthetic Isotope Tracer in Shijiao Section of North River

本文论述了同位素综合示踪探测管涌的原理与方法 ,通过对北江大堤石角段管涌区附近钻孔中渗透流速、渗透系数等参数的测定 ,结合理论计算与相关分析推断出该区的管涌来自深部砂岩的断层等构造 ,通过在堤坝顶部钻孔发现了多个空洞构造 。

The principle and technique of piping detection with synthetic isotope tracer are stated herein.Through the measurement of seepage velocity and seepage coefficient of boreholes in the vicinity of the piping area and combined with theoretical calculation and relevant analyses it is inferred that the said piping was caused by the fault and vacavities in deep sandstone stratum.Many caves were found in the boreholes at the top of the dyke,so it is verified that the result of detection with synthetic isotope tracer is accurate.