苏立君, 徐兴倩, 梁双庆. 2015: 基于微动勘察技术的下覆基岩碎石土滑坡结构特征分析. 工程地质学报, 23(s1): 617-623. DOI: 10.13544/j.cnki.jeg.2015.s1.094
    引用本文: 苏立君, 徐兴倩, 梁双庆. 2015: 基于微动勘察技术的下覆基岩碎石土滑坡结构特征分析. 工程地质学报, 23(s1): 617-623. DOI: 10.13544/j.cnki.jeg.2015.s1.094
    SU Lijun, XU Xingqian, LIANG Shuangqing. 2015: ANALYSIS ON THE STRUCTURE CHARACTERISTICS OF A UNDERLIE BEDROCK GRAVEL LANDSLIDE BASED ON MICROTREMOR SURVEY METHODS. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 617-623. DOI: 10.13544/j.cnki.jeg.2015.s1.094
    Citation: SU Lijun, XU Xingqian, LIANG Shuangqing. 2015: ANALYSIS ON THE STRUCTURE CHARACTERISTICS OF A UNDERLIE BEDROCK GRAVEL LANDSLIDE BASED ON MICROTREMOR SURVEY METHODS. JOURNAL OF ENGINEERING GEOLOGY, 23(s1): 617-623. DOI: 10.13544/j.cnki.jeg.2015.s1.094

    基于微动勘察技术的下覆基岩碎石土滑坡结构特征分析

    ANALYSIS ON THE STRUCTURE CHARACTERISTICS OF A UNDERLIE BEDROCK GRAVEL LANDSLIDE BASED ON MICROTREMOR SURVEY METHODS

    • 摘要: 滑坡体潜在滑动面深度及几何形态的推测是进行滑坡体防护和治理的基本依据, 推测的准确度与滑坡治理工程的质量息息相关。传统获取滑动面信息的技术主要是钻探、槽探等技术, 而这些技术存在耗时、耗力和不经济的特点, 受地形起伏的限制, 还会对坡体造成损伤, 不益大范围的展开。本文利用微动勘察(MSM)台阵技术采集下覆基岩碎石土滑坡的微动信号, 以空间自相关法(SPAC)处理数据获取其剪切波速度结构信息, 并与相应的钻孔资料进行对比。结果发现, 微动勘察得到的滑坡地层分布及基覆界面与钻孔结果基本一致, 且起伏形态清晰, 不受地形起伏的影响, 精度较高。该技术在探测深度、尺度及经济程度方面都优于钻探技术, 更适合于大范围、高密度的滑坡勘察。

       

      Abstract: The buried depth and geometry of potential sliding surface is the fundamental basis of estimating the evolution mechanism and performing administration of a landslide. The precision of engineering geological survey was closely related to the quality of landslide controlling engineering. Conventional techniques to obtain information about landslide structure were mainly drilling, pitting, trenching and so on, but they were time consuming, more labor and expense, especially a degree of damage on landslide body. These techniques were not conductive to do large scale surveying due to above limitations. In this study, we observed digital signals on the underlie bedrock gravel landslide using microtremor array, and extracted the shear wave velocity structure with Spatial Autocorrelation(SPAC)method. Compared to the boreholes, the results indicated that the depth of stratigraphic distribution and clear underlie bedrock interface basically coincided with drilling with high resolution and without limitation of terrains. MSM was superior to borehole in terms of surveying depth, scale and expense, and allowed a large scale and high density investigation of structure characteristics of underlie bedrock gravel landslide.

       

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