李华, 王东辉. 2017: 不同物理和几何参数条件下滑坡要素的地质雷达探测响应研究. 工程地质学报, 25(4): 1057-1064. DOI: 10.13544/j.cnki.jeg.2017.04.020
    引用本文: 李华, 王东辉. 2017: 不同物理和几何参数条件下滑坡要素的地质雷达探测响应研究. 工程地质学报, 25(4): 1057-1064. DOI: 10.13544/j.cnki.jeg.2017.04.020
    LI Hua, WANG Donghui. 2017: GPR RESPONSES ON DIFFERENT PHYSICAL AND GEOMETRICAL PARAMETERS OF LANDSLIDE FACTORS. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 1057-1064. DOI: 10.13544/j.cnki.jeg.2017.04.020
    Citation: LI Hua, WANG Donghui. 2017: GPR RESPONSES ON DIFFERENT PHYSICAL AND GEOMETRICAL PARAMETERS OF LANDSLIDE FACTORS. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 1057-1064. DOI: 10.13544/j.cnki.jeg.2017.04.020

    不同物理和几何参数条件下滑坡要素的地质雷达探测响应研究

    GPR RESPONSES ON DIFFERENT PHYSICAL AND GEOMETRICAL PARAMETERS OF LANDSLIDE FACTORS

    • 摘要: 利用改进的时域有限差分算法,对不同物理和几何参数条件下各种滑坡要素组成的综合模型进行数值模拟,研究滑带厚度、滑带充填介质、滑体岩土类型、滑坡裂缝等的地质雷达探测响应效果。研究结果表明,具有各自物理和几何参数的滑坡要素与地质雷达响应特征之间存在一一对应的数学关联,通过这种关联可以从野外实测数据中有效提取和判读滑坡要素的类型及物理几何特性,为滑坡稳定性评价提供地球物理依据。为了展示该研究成果的适用性,以三峡库区将军滩滑坡的地质雷达野外实测数据为例进行解释推断,成功识别出滑坡体的滑带埋深及分布、滑体的裂缝发育程度等情况,为评价滑坡稳定性,合理优化滑坡治理方案提供了科学参考。

       

      Abstract: Ground penetrating radar(GPR)responses are examined with a number of synthetic models resembling main landslide factors with different physical and geometrical parameters. The factors include slip band thick, slip band with different filling mediums, type of rock and soil, different cracks. The GPR responses are simulated using an improved finite difference time domain forward modeling algorithm. It is shown that there are mathematical relationships between the characteristics of GPR responses and the respective geometrical and physical parameters of landslide. Such mathematical relationships are applied to real field data for deriving estimations of hidden subsurface landslide parameters which can be used to assess the landslide accurately. In order to show the applicability of this study, the GPR field data of Jiangjuntan landslide in Three Gorges Reservoir area is chosen to infer using the mathematical relationships. The result is shown that factors including the depth and distribution of the landslide, the development of the cracks, can be successfully identified.

       

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