Long-term kinematics and mechanism of a deep-seated slow-moving debris slide near Wudongde hydropower station in Southwest China

Jiang, Shu; Wang, Yifeng; Tang, Chuan; Liu, Ke

doi:10.1007/s11629-017-4473-1

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…In order to validate the attributes of the time-series displacement acquired through the suggested approach over the course of the observation period in various regions, two sampling points were selected from the crown and toe of Jinpingzi [44], as depicted in Figure 11. The improved PSInSAR technique was employed to observe the threedimensional displacements within a 30 m radius surrounding the GNSS points.…”

Section: Resultsmentioning

confidence: 99%

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Integrated PSInSAR and GNSS for 3D Displacement in the Wudongde Area

Huang,

Du,

Jin

et al. 2024

Land

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The major limitation of persistent scatterer interferometric synthetic aperture radar (PSInSAR) is that it detects only one- or two-dimensional displacements, such as those in the line of sight (LOS) and azimuth directions, by repeat-pass SAR observations. Three-dimensional (3D) displacement reflects the actual sliding surface and failure mechanism of a slope. To transform LOS deformation into a reliable 3D displacement, a new approach for obtaining the 3D displacement is proposed herein based on the slope deformation (Dslope). First, the deformation value calculated using the Global Navigation Satellite System (GNSS) as a constraint is used to eliminate the residual deformation of PSInSAR. Then, Dslope is obtained from the relationship between DLOS and the slope angle extracted from the digital elevation model (DEM). Finally, according to the geometric relationship between Dslope and DLOS, a novel approach for calculating 3D displacement is proposed. When comparing the 3D displacement extracted by the proposed method and that from GNSS data in Jinpingzi landslide, the root-mean-square error (RMSE) values were ±2.0 mm, ±2.8 mm, and ±2.6 mm in the vertical, north, and east directions, respectively. The proposed method shows high accuracy in 3D displacement calculation, which can help to determine the failure mechanism of a landslide. This method can be widely used in landslide monitoring in wide areas.

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Section: Resultsmentioning

confidence: 99%

“…The scale is about 3 km long and 1.5 km wide, and it is only 0.9 to 2.5 km downstream from Wudongde hydropower station. The volume of the sliding mass is more than 27 × 10 6 m 3 [44]. The deposits in the toe of the landslide have contributed to changing the water level of Jinsha River.…”

Section: Study Areamentioning

confidence: 99%

Integrated PSInSAR and GNSS for 3D Displacement in the Wudongde Area

Huang,

Du,

Jin

et al. 2024

Land

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“…Inclinometer and Piezometer Measurements. The shear surface location can be obtained from an interpretation of inclinometric measurements [49][50][51][52]. The detailed data from 10 inclinometer monitors are shown in Figure 11, and Figure 2 shows the layout of inclinometers (A-A profiles in Figure 5(a)).…”

Section: Monitoring Resultsmentioning

confidence: 99%

Deformation Process and Mechanism Analyses of a Rock Slope Based on Long-Term Monitoring at the Pubugou Hydropower Station, China

Mei

Nengfeng

et al. 2021

Geofluids

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This paper presents a typical 450 m high rock slope in a highly jointed and fractured rock mass at Pubugou (PBG) hydropower station on the Dadu River. We established a set of multiphase field geological survey combined with GPS, inclinometers, and piezometer monitoring system to analyze the deformation and failure mechanism of rock slope. The results show that small-scale excavation in road construction disrupted the balance of the Pubugou rock slope (PBGRS), and several local retrogressive failures occurred at the toe. Monitoring data regarding surface and subsurface movements show that the PBGRS is stable as a whole. The deformation concentrated mainly in the loosened fractured zone, which was a feature with sliding-compression cracking. Highly loosened rock mass was the predominant factor affecting the stability of the PBGRS, while the role of reservoir water level fluctuation, though positive, was not significant. Overall, the PBGRS still has a high potential for further development, especially in the slope’s upper zone. To reinforce the slope, measurements mainly consist of the concrete frame combined with anchor cables constructed on the slope. In this study, the analysis was carried out of pre- and postreinforcement measure slope stability with numerical simulation, and safety factor increased from 1.09 to 1.21. This study’s findings have important implications to the analytical method and reinforcement design with geological settings like that of the PBGRS.

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Deformation Characteristics and Mechanism of Side Walls of Wudongde Hydropower Station

2022

Geotech Geol Eng

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Long-term kinematics and mechanism of a deep-seated slow-moving debris slide near Wudongde hydropower station in Southwest China

Cited by 8 publications

References 20 publications

Integrated PSInSAR and GNSS for 3D Displacement in the Wudongde Area

Integrated PSInSAR and GNSS for 3D Displacement in the Wudongde Area

Deformation Process and Mechanism Analyses of a Rock Slope Based on Long-Term Monitoring at the Pubugou Hydropower Station, China

Deformation Characteristics and Mechanism of Side Walls of Wudongde Hydropower Station

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