Understanding the triggering mechanism and possible kinematic evolution of a reactivated landslide in the Three Gorges Reservoir

Gu, Dong Ming; Huang, Da; Yang, Wei; Zhu, Ji Liang; Fu, Guo Yang

doi:10.1007/s10346-017-0845-4

Cited by 95 publications

(22 citation statements)

References 22 publications

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“…The landslide boundary was determined by the landslide deformation and adjacent terrain (Gu et al, 2017;Pánek et al, 2008). The ancient landslide is generally like W in shape, with slope of about 21°.…”

Section: Characteristics Of Ancient Landslidementioning

confidence: 99%

Landslide Triggered by Orthogonal Tunnel Excavation and Prevention Measures in Jimei Village, Sichuan Province, China

wang

Liu

et al. 2021

Preprint

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The axis of highway tunnels constructed in mountains under complex geological conditions is usually orthogonal to the section of potential landslide. The tunnel construction may lead to landslide, which then may result in the deformation and/or cracking of tunnels. Therefore, it is very important and practical for tunnel projects to study the complex interaction mechanism between orthogonal tunnel and landslide and provide appropriate prevention measures for tunnel. This paper, on the base of geological survey, on-site monitoring and numerical simulation, analyzed the deformation and reason of an ancient landslide revived by tunnel construction and studied the prevention measures for tunnel. The results show that the reason for the revival of the ancient landslide resulted mainly from the tunnel construction through sliding surface, and the ancient landslide is generally stable because most landslide deformation occurred beyond the tunnel and in the upper part of landslide. The numerical simulation was used to optimize the tunnel prevention scheme by the analysis to the stability, stresses and deformation of landslide based on stress-strain control theory. The original anti-slide pile design was cancelled and finally the tunnel is reinforced by upper soil removal and moving upper soil into toe. This tunnel has successfully completed and are under good operation. The used prevention measures were proven to be effective according to the monitoring data about displacements and stress of landslide and tunnel during operation period, and saved about seven million US$. The research results in this paper may offer a beneficial reference to projects with similar geological conditions.

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Section: Characteristics Of Ancient Landslidementioning

confidence: 99%

Landslide Triggered by Orthogonal Tunnel Excavation and Prevention Measures in Jimei Village, Sichuan Province, China

wang

Liu

et al. 2021

Preprint

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“…In recent literature, some authors have applied the correlation and sensitivity analysis methods to explain the triggering mechanism of landslides [28][29][30], while others have proposed kinematic models on the basis of movement identification to predict landslide risks [31,32]. However, few studies use integrated in situ data to uncover the time-variable patterns of slow-moving colluvial landslides in the TGR area.…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir

et al. 2021

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Since the impoundment of the Three Gorges Reservoir (TGR) in June 2003, the fluctuation of the reservoir water level coupled with rainfall has resulted in more than 2500 landslides in this region. Among these instability problems, most colluvial landslides exhibit slow-moving patterns and pose a significant threat to local people and channel navigation. Advanced monitoring techniques are therefore implemented to investigate landslide deformation and provide insights for the subsequent countermeasures. In this study, the development pattern of a large colluvial landslide, locally named the Ganjingzi landslide, is analyzed on the basis of long-term monitoring. To understand the kinematic characteristics of the landslide, an integrated analysis based on real-time and multi-source monitoring, including the global navigation satellite system (GNSS), crackmeters, inclinometers, and piezometers, was conducted. The results indicate that the Ganjingzi landslide exhibits a time-variable response to the reservoir water fluctuation and rainfall. According to the supplement of community-based monitoring, the evolution of the landslide consists of three stages, namely the stable stage before reservoir impoundment, the initial movement stage of retrogressive failure, and the shallow movement stage with stepwise acceleration. The latter two stages are sensitive to the drawdown of reservoir water level and rainfall infiltration, respectively. All of the monitoring approaches used in this study are significant for understanding the time-variable pattern of colluvial landslides and are essential for landslide mechanism analysis and early warning for risk mitigation.

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“…The pile-landslide interaction highlights landslide evolution, which is controlled by internal and external factors and involves multi-field interaction parameters, such as stress, displacement, and temperature [6,7]. The deformation characteristics are different at different evolution stages [8][9][10]. Therefore, it is essential to identify the evolutionary stage to understand the deformation and failure process of a pile-reinforced landslide.…”

Section: Introductionmentioning

confidence: 99%

Thermal Infrared Imagery Integrated with Multi-Field Information for Characterization of Pile-Reinforced Landslide Deformation

Zhou

Ying

et al. 2020

Sensors

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Physical model testing can replicate the deformation process of landslide stabilizing piles and analyze the pile-landslide interaction with multiple field information, thoroughly demonstrating its deformation and failure mechanism. In this paper, an integrated monitoring system was introduced. The instrumentation used included soil pressure cells, thermal infrared (TIR) imagery, 3D laser scanner, and digital photography. In order to precisely perform field information analysis, an index was proposed to analyze thermal infrared temperature captured by infrared thermography; the qualitative relationship among stress state and deformation as well as thermal infrared temperature is analyzed. The results indicate that the integrated monitoring system is expected to be useful for characterizing the deformation process of a pile-reinforced landslide. Difference value of TIR temperature ( T I R m ) is a useful indicator for landslide detection, and its anomalies can be selected as a precursor to landslide deformation.

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Understanding the triggering mechanism and possible kinematic evolution of a reactivated landslide in the Three Gorges Reservoir

Cited by 95 publications

References 22 publications

Landslide Triggered by Orthogonal Tunnel Excavation and Prevention Measures in Jimei Village, Sichuan Province, China

Landslide Triggered by Orthogonal Tunnel Excavation and Prevention Measures in Jimei Village, Sichuan Province, China

Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir

Thermal Infrared Imagery Integrated with Multi-Field Information for Characterization of Pile-Reinforced Landslide Deformation

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