探地雷达的常见干扰和不良地质体的超前预报在隧道工程中的应用

发布时间：2018-03-09 13:31

  本文选题：隧道超前预报　切入点：探地雷达　出处：《长江科学院院报》2017年08期 　论文类型：期刊论文

【摘要】：为了在隧道工程中准确应用探地雷达进行超前预报,针对可能遇到的常见干扰和典型不良地质体,探讨了常见干扰的成因及其对资料解译的影响,确定常见的干扰剖面图,并分别对天线耦合干扰和金属物干扰进行举例分析,提出探地雷达在采集数据过程中避开干扰的注意事项。列举3个工程实例,分别介绍了探地雷达对溶洞、断层裂隙水、软弱夹层等不良地质体的预报研究,通过分析其典型雷达剖面图的波形、频率、振幅等特征,依此推断出隧道开挖掌子面前方潜在不良地质体的类型以及位置、构造走向等空间分布特征。该结果与实际开挖揭示的不良地质体的分布范围基本一致,验证了探地雷达在预报隧道常见不良地质体的可行性和有效性。通过总结分析常见雷达干扰图像和典型不良地质体剖面图,有助于物探工作者对复杂地质体进行更精确地解释,确保隧道施工安全。
[Abstract]:In order to accurately apply ground penetrating radar to advance prediction in tunnel engineering, the causes of common interference and its influence on interpretation of data are discussed in view of the common interference and typical bad geological body, and the common interference profile is determined. The antenna coupling interference and metal object interference are analyzed respectively, and the points for attention to avoid jamming in the process of data acquisition by ground penetrating radar are put forward. Three engineering examples are given, and the ground penetrating radar to karst cave and fault fissure water are introduced respectively. Based on the analysis of the waveform, frequency, amplitude and other characteristics of typical radar profiles, the types and positions of potentially bad geological bodies in front of the face of tunnel excavation are inferred by studying the prediction of poor geological bodies such as weak intercalations, and by analyzing the waveform, frequency and amplitude of typical radar profiles. The result is basically consistent with the distribution range of the bad geological body revealed by the actual excavation. The feasibility and effectiveness of ground penetrating radar in predicting common bad geological bodies in tunnels are verified. By summing up and analyzing common radar jamming images and typical bad geological body profiles, it is helpful for geophysical researchers to interpret complex geological bodies more accurately. Ensure the safety of tunnel construction.
【作者单位】： 中交第二公路勘察设计研究院有限公司武汉中交岩土工程有限责任公司;长江科学院水利部岩土力学与工程重点实验室;
【分类号】：P631.3;U452.11
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本文编号：1588737