油竹山隧道超前地质预报（岩溶探测）地质雷达法应用研究

发布时间：2019-06-14 00:53

【摘要】：研究总结地质雷达进行地质探测的基本理论,了解电磁波在地质岩土体介质中的传播、折射以及反射规律。研究分析地质雷达设备的探测原理、探测距离、分辨率,并介绍探测方法及其成果解释原理。通过对岩溶地区隧道工程中实例,学习总结岩溶病害发育特征规律。阐述岩溶在水平岩层、倾斜岩层、背斜、向斜地质环境下岩溶病害发育规律,包括岩溶病害类别、规模、方向等,并绘制成岩溶发育地质模型图。结合勘察报告、掌子面地质情况并运用岩溶病害发育规律及地质模型分析掌子面前方岩溶病害发育情况,有针对性地调整地质雷达探测过程与方法：(1)地质雷达探测方式,根据病害大体类别、位置、探测平面的预报意义布置雷达测线；(2)调整数据采集与处理的方式和参数,根据地质情况对数据进行处理,有效地滤除干扰信号,增强有预报意义的频率信号；(3)数据成果解释,结合地质情况和岩溶病害发育规律及地质模型,较为准确地解释雷达探测成果图。从而形成超前地质预报岩溶探测地质雷达新技术方法,提高了岩溶病害探测准确度和探测效率。贵广铁路油竹山隧道为高风险岩溶隧道,采用了岩溶探测地质雷达新技术方法探测掌子面前方岩溶病害,包括溶洞、溶槽、溶隙破碎带、富水区等,在施工过程中基本上探测出了掌子面前方岩溶病害,为施工单位施工工艺的调整提供了准确的地质资料。为施工安全、施工质量、施工工期提供了有力保证
[Abstract]:The basic theory of geological detection by geological radar is studied and summarized, and the propagation, refraction and reflection of electromagnetic wave in geological rock and soil media are understood. The detection principle, detection range and resolution of GPR equipment are studied and analyzed, and the detection method and its interpretation principle are introduced. Through the example of tunnel engineering in Karst area, the development characteristics of Karst disease are studied and summarized. This paper expounds the development law of Karst disease in horizontal strata, inclined strata, anticlinal and synclinal geological environment, including the category, scale and direction of Karst diseases, and draws the geological model diagram of Karst development. Combined with the investigation report, the geological situation of the palm surface is analyzed, and the development law of the Karst disease and the geological model are used to analyze the development of the Karst disease in front of the palm surface. The process and method of the GPR detection are adjusted: (1) the geological radar detection mode, according to the general category, position and prediction significance of the detection plane, arrange the radar survey line; (2) adjust the mode and parameters of data acquisition and processing, process the data according to the geological situation, effectively filter out the interference signal and enhance the frequency signal of prediction significance; (3) the interpretation of the data results, combined with the geological situation, the development law of Karst disease and the geological model, explain the radar detection result map more accurately. Thus, a new technical method of geological radar for advanced geological prediction of Karst detection is formed, and the detection accuracy and efficiency of Karst disease detection are improved. Youzhushan Tunnel of Guiguang Railway is a high risk Karst tunnel. A new technique of Karst Detection Geological Radar is used to detect Karst diseases in front of palmface, including cave, trough, dissolved gap broken zone, rich water area and so on. The Karst disease in front of Pocket face is basically detected in the construction process, which provides accurate geological data for the adjustment of construction technology of construction unit. It provides a powerful guarantee for construction safety, construction quality and construction period.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.1;P631.3

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