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Slope deformation monitoring in the Jiufenershan landslide using time domain reflectometry technology

机译：利用时域反射仪技术山坡滑坡坡度变形监测

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摘要

This paper assesses potential slope movement in a landslide area using a grouted cable of time domain reflectometry (TDR) technology compared with data from an inclinometer and bore logs. The paper quantifies the magnitude of a TDR coaxial cable by laboratory shear and extension tests. The maximum and average magnitudes of cable deformation by laboratory shear failure were 60mm and 47mm, respectively. Then, in the paper, the results of the laboratory testing were applied to a case study where there were two inclinometers and two TDR monitoring stations. Based on laboratory shear and extension testing, differences in TDR-reflected waveforms can be regarded as locations of cable deformations. Meanwhile, the magnitude of cable deformations can be measured by the regression equation of the relation between reflection coefficients and shear displacements. Finally, the working limit of the cable for potential slope movement can be determined at 210-m reflection coefficient in laboratory and field testing. When a grouted cable ruptured, the TDR technology can detect a reflection coefficient at 210m corresponding to the potential shear displacement at approximately 47mm, which means that a localized slope deformation significantly occurred at the location of the cable rupture.
机译：本文评估了使用来自倾斜计和钻孔日志的数据的时间域反射测量测量仪（TDR）技术的灌浆电缆在滑坡区域中的潜在斜坡运动。该纸张通过实验室剪切和延长测试量化TDR同轴电缆的大小。通过实验室剪切破坏的电缆变形的最大和平均幅度分别为60mm和47mm。然后，在本文中，将实验室测试的结果应用于案例研究，其中有两个倾斜度和两个TDR监测站。基于实验室剪切和延长测试，可以将TDR反射波形的差异视为电缆变形的位置。同时，电缆变形的大小可以通过反射系数和剪切位移之间的关系的回归方程来测量。最后，可以在实验室测试中的210m反射系数下确定电缆电缆的工作限制。当灌浆电缆破裂时，TDR技术可以在约47mm下对应于电位剪切位移的210米处检测反射系数，这意味着在电缆破裂的位置显着发生局部倾斜变形。

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