Reactivation mechanism of old landslide triggered by coupling of fault creep and water infiltration: a case study from the east Tibetan Plateau

Zhang, Yongshuang; Ren, Sanshao; Liu, Xiaoyi; Guo, Changbao; Li, Jinqiu; Bi, Junguo; Ran, Lina

doi:10.1007/s10064-023-03290-5

Cited by 15 publications

(7 citation statements)

References 33 publications

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“…Previous studies have claimed that creeping of active faults controls the local stress field and affects slope stability [43,44]. On the one hand, the field investigation found that the Xianshui River Fault passes through the middle of the Dandu landslide, and the horizontal slip rate of this fault has, since the Holocene, reached 10-20 mm/a [34][35][36]; its influence on the ancient landslide cannot be ignored.…”

Section: Active Faults Are the Driving Forces For The Formation Of La...mentioning

confidence: 99%

“…It was also found that it takes time for rainwater to infiltrate into the slip zone [44,51], which explains why the response of landslide deformation to rainfall lags by several weeks. Furthermore, this may also explain why many landslides occur during the dry season [44,52], approximately a month after the rainy season, on the eastern margin of the Tibetan Plateau. In the past, it was commonly assumed that these landslides were not directly related to rainfall [53].…”

Section: Rainfall Is a Trigger Factor For Landslide Reactivationmentioning

confidence: 99%

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Deformation Behavior and Reactivation Mechanism of the Dandu Ancient Landslide Triggered by Seasonal Rainfall: A Case Study from the East Tibetan Plateau, China

Ren,

Zhang,

et al. 2023

Remote Sensing

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In recent years, numerous ancient landslides initially triggered by historic earthquakes on the eastern Tibetan Plateau have been reactivated by fault activity and heavy rainfall, causing severe human and economic losses. Previous studies have indicated that short-term heavy rainfall plays a crucial role in the reactivation of ancient landslides. However, the deformation behavior and reactivation mechanisms of seasonal rainfall-induced ancient landslides remain poorly understood. In this paper, taking the Dandu ancient landslide as an example, field investigations, ring shear experiments, and interferometric synthetic aperture radar (InSAR) deformation monitoring were performed. The cracks in the landslide, formed by fault creeping and seismic activity, provide pathways for rainwater infiltration, ultimately reducing the shear resistance of the slip zone and causing reactivation and deformation of the Dandu landslide. The deformation behavior of landslides is very responsive to seasonal rainfall, with sliding movements beginning to accelerate sharply during the rainy season and decelerating during the dry season. However, this response generally lags by several weeks, indicating that rainfall takes time to infiltrate into the slip zone. These research results could help us better understand the reactivation mechanism of ancient landslides triggered by seasonal rainfall. Furthermore, these findings explain why many slope failures take place in the dry season, which typically occurs approximately a month after the rainy season, rather than in the rainy season itself.

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Section: Active Faults Are the Driving Forces For The Formation Of La...mentioning

confidence: 99%

Section: Rainfall Is a Trigger Factor For Landslide Reactivationmentioning

confidence: 99%

Deformation Behavior and Reactivation Mechanism of the Dandu Ancient Landslide Triggered by Seasonal Rainfall: A Case Study from the East Tibetan Plateau, China

Ren,

Zhang,

et al. 2023

Remote Sensing

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“…The eastern Tibetan Plateau is characterized by one of the steepest terrains and the most intense tectonic activity. This region also has a large number of well-developed ancient landslides (Zhang et al, 2023). However, these landslides have experienced reactivation in recent years due to factors such as tectonic movement, increased human activities, and extreme rainfall; these events have resulted in increasingly serious casualties and economic losses (García-Delgado, 2020;Guo et al, 2020;Yan et al, 2021) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Response Mechanism of the Residual Strength to the Mesostructure of the Shear Surface in the Gravelly Slip Zone of Ancient Landslides

Ren,

Zhang,

et al. 2024

JGR Earth Surface

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Ancient landslides tend to reactivate along pre‐existing slip zones that have reached a residual state. On the eastern margin of the Tibetan Plateau, previous research has indicated that the slip zone of ancient landslides is primarily composed of clayey soil with gravel, known as gravelly slip zone soil. However, the relationship between the macromechanical behavior of gravelly slip zones and the mesostructure of the shear surfaces affected by gravel is still unclear. Herein, ring shear tests and reversal direct shear tests were performed on gravelly slip zone soil, and the 3D morphology and shear surface roughness were quantitatively characterized by using 3D laser scanning technology and the power spectral density method. The results showed a significant correlation between the friction coefficient of the shear surface and its roughness. Gravel played a crucial role in influencing the macromechanical behavior of slip zones by altering the mesomorphology of the shear surfaces. By analyzing the mechanical properties of the contact unit on the shear surface, the residual strength of the gravelly slip zone was found to be jointly controlled by the basic strength of the fine‐grained soil and the undulations caused by the gravel. Finally, a residual strength model was developed for the gravelly slip zone considering both the strength of the fine‐grained soil and the shear surface roughness caused by the gravel.

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“…In addition to new landslides, there is a risk that old landslides could slide again. An old landslide is the result of prolonged and intricate geological processes occurring on slopes [7], while most old landslides are stable, triggers such as human activities, earthquakes, and rainfall can lead to the reactivation of these old landslides. In the 1950s, the Wolongsi old landslide in the Xi'an-Baoji section of the Longhai Railway slid again, with a sliding area about 33 × 104 m 2 and a volume of about 2.0 × 10 7 m 3 , pushing the Longhai Railway southward by more than 100 m and interrupting the railway for several days.…”

Section: Introductionmentioning

confidence: 99%

Optimal and Multi-View Strategic Hybrid Deep Learning for Old Landslide Detection in the Loess Plateau, Northwest China

Gao,

Xi,

et al. 2024

Remote Sensing

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Old landslides in the Loess Plateau, Northwest China usually occurred over a relatively long period, and their sizes are usually smaller compared to old landslides in the alpine valley areas of Sichuan, Yunnan, and Southeast Tibet. These landslide areas may have been changed either partially or greatly, and they are usually covered with vegetation and similar to their surrounding environment. Therefore, it is a great challenge to detect them using high-resolution remote sensing images with only orthophoto view. This paper proposes the optimal-view and multi-view strategic hybrid deep learning (OMV-HDL) method for old loess landslide detection. First, the optimal-view dataset in the Yan’an area (YA-OP) was established to solve the problem of insufficient optical features in orthophoto images. Second, in order to make the process of interpretation more labor-saving, the optimal-view and multi-view (OMV) strategy was proposed. Third, hybrid deep learning with weighted boxes fusion (HDL-WBF) was proposed to detect old loess landslides effectively. The experimental results with the constructed optimal-view dataset and multi-view data show that the proposed method has excellent performance among the compared methods—the F1 score and AP (mean) of the proposed method were improved by about 30% compared with the single detection model using traditional orthophoto-view data—and that it has good detection performance on multi-view data with the recall of 81.4%.

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Reactivation mechanism of old landslide triggered by coupling of fault creep and water infiltration: a case study from the east Tibetan Plateau

Cited by 15 publications

References 33 publications

Deformation Behavior and Reactivation Mechanism of the Dandu Ancient Landslide Triggered by Seasonal Rainfall: A Case Study from the East Tibetan Plateau, China

Deformation Behavior and Reactivation Mechanism of the Dandu Ancient Landslide Triggered by Seasonal Rainfall: A Case Study from the East Tibetan Plateau, China

Response Mechanism of the Residual Strength to the Mesostructure of the Shear Surface in the Gravelly Slip Zone of Ancient Landslides

Optimal and Multi-View Strategic Hybrid Deep Learning for Old Landslide Detection in the Loess Plateau, Northwest China

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