Applying time domain reflectometry to quantification of slope deformation by shear failure in a landslide

Lin, Yung-Kai; Chen, I-Hui; Ho, Shei-Chen; Chen, Junyang; Su, Miau-Bin

doi:10.1007/s12665-019-8124-4

Cited by 9 publications

(13 citation statements)

References 12 publications

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“…Whether shearing deformations are big or small, the magnitude of TDR reflected waveforms is significant correlation with cable deformation [20,21]. An integrated area method is proposed to quantify the magnitude of a TDR reflected waveform on the deformation of rock masses and concrete structures through laboratory bench tests [10,17]. The method involved the integration of the TDR voltage signal over time in Figure 2, which means that L1 is the start point of a TDR reflected waveform due to a change in capacitance and L2 is an end point when the voltage returns to its reference level [17].…”

Section: Laboratory Testing For Tdr Technologymentioning

confidence: 99%

“…Finally, data from the tester were transmitted to a PC and was displayed as TDR waveforms. The cable and grout were the same as the materials used in field installation, listed in Table 1 [17]. [15,16].…”

Section: Laboratory Testing For Tdr Technologymentioning

confidence: 99%

“…Secondly, an important ability for the TDR technology is to locate the relative movement along the cable by extended or shear stress that causes the change of cable characteristic impedance when two adjacent rock masses move each other [15,16]. Finally, reflection coefficients of TDR-cable deformation are positive correlations with the rate of slope movement [9,17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The first is for laboratory experiments that include shear and extension tests with grouted cables. The TDR technology can interrogate reflected waveforms corresponding to the cable deformation in order to get a relation between reflection coefficients and the magnitude of cable deformation [17]. The other theme is for field TRD monitoring.…”

Section: Introductionmentioning

confidence: 99%

“…The other theme is for field TRD monitoring. There are several TDR monitoring stations in six landslide areas where occurred some slides in Taiwan [6,[17][18][19]. Finally, the study analyzes field data from TDR monitoring stations to compare to results of quantification in laboratory tests and to determine the location, type, and magnitude of slope movement for long-term monitoring in the landslide areas.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Long-Term Monitoring of Slope Movements with Time-Domain Reflectometry Technology in Landslide Areas, Taiwan

Su¹,

Chen²,

Ho³

et al. 2020

Landslides - Investigation and Monitoring

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The study employs time-domain reflectometry (TDR) technology for landslide monitoring to explore rock deformation mechanism and to estimate locations of potential sliding surfaces in several landslide areas, Taiwan, over ten years. Comparing to laboratory and field testing, sliding surfaces in landslide areas occurred mainly at two types, namely shear and extension failure. The TDR technology is used for field monitoring to analyze locations of sliding surfaces and to quantify the magnitude of the sliding through laboratory shear and extension tests. There are several TDR-monitoring stations in six alpine landslide areas in the middle of Taiwan for long-term monitoring. A relation between TDR reflection coefficients and shear displacements was employed for a localized shear deformation in the field. Furthermore, the type of a cable rupture for the TDR monitoring in landslides can be determined as shear, extension, or compound failure through the field TDR waveforms. Overall, the TDR technology is practically used for a long-term monitoring system to detect the location and magnitude of slope movement in landslide areas.

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Section: Laboratory Testing For Tdr Technologymentioning

confidence: 99%

Section: Laboratory Testing For Tdr Technologymentioning

confidence: 99%