Centrifuge modelling of landslides and landslide hazard mitigation: A review

Fang, Kun; Tang, Huiming; Li, Changdong; Su, Xuexue; An, Pengju; Sun, Sixuan

doi:10.1016/j.gsf.2022.101493

Cited by 125 publications

(40 citation statements)

References 151 publications

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“…Landslides are serious geohazards that occur under a variety of climatic conditions (Medina et al, 2021;Fang et al, 2023), especially in the Three Gorges reservoir area of China (Guo et al, 2020). The tested soil mass was taken from Xietan, Zigui County, Hubei Province.…”

Section: Basic Physical Property Test Of Gravel Soilmentioning

confidence: 99%

Mechanical test and action mechanism of interface between gravel soil and concrete

Zhou²,

Liu³

et al. 2023

Front. Earth Sci.

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The mechanical properties of the gravel soil-concrete structure interface are one of the important issues in academia and engineering. In this research, gravel soil samples were collected from the Three Gorges Reservoir region to carry out simple shear and direct shear tests of the gravel soil-structure interface. The shearing process was simulated with the numerical method. The strength and deformation characteristics of the interface, the applicability of the interface constitutive model, and the failure mechanism of the interface were analyzed. The results show that: 1) The direct shear test curve of the gravel soil-concrete interface shows strain softening with obvious stress peak, while the simple shear test curve shows strain hardening. The stress peak of the direct shear test is about 30% higher than that of the simple shear test. The shear contraction effect of the simple shear test is about 31% larger than that of the direct shear test. 2) The non-linear relationship of the gravel soil-concrete interface can be described by a hyperbola model, which has a good adaptability to the constitutive relationship of the interface in numerical analysis software. 3) The gravel soil-concrete interface gradually develops shear failure from the edge to the inside. The essence of soil-structure interaction is the movement of soil grains. The research results can provide a reference for the analysis of gravel soil-concrete interaction.

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Section: Basic Physical Property Test Of Gravel Soilmentioning

confidence: 99%

Mechanical test and action mechanism of interface between gravel soil and concrete

Zhou²,

Liu³

et al. 2023

Front. Earth Sci.

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“…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). Although most reactivated landslides move slowly and rarely claim lives, they often inflict long‐term damage to infrastructure, such as roads and buildings (Deng et al., 2016; Fang et al., 2023; Glastonbury & Fell, 2008; Lacroix et al., 2020). Moreover, in some cases, reactivated landslides undergo rapid acceleration and catastrophic failure, leading to extensive destruction and fatalities (Agliardi et al., 2020; Gao et al., 2023; He et al., 2021; Iverson et al., 2015; Palmer, 2017).…”

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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“…The Three Gorges Reservoir area has become one of the most severely affected by landslides in China (Wang, Zhang, et al, 2021; Wang, Wu, et al, 2021; Zhang et al, 2022). Because the geological structure of the reservoir area is complex, and both banks are affected by the fluctuation of reservoir water for a long time (Fang et al, 2023; C. D. Li et al, 2019; B. B. Yang et al, 2019; T. Y. Zhang, Fu, et al, 2022; K. Zhang, Wang, et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Landslide Susceptibility mapping using random forest and extreme gradient boosting: A case study of Fengjie, Chongqing

Zhang

Liu

et al. 2023

Geological Journal

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Landslide susceptibility analysis can provide theoretical support for landslide risk management. However, some susceptibility analyses are not sufficiently interpretable. Moreover, the accuracy of many research methods needs to be improved. Therefore, this study can supplement these deficiencies. This study aims to research the evaluation effects of random forest (RF) and extreme gradient boosting (XGBoost) classifier models on landslide susceptibility, and to compare their applicability in Fengjie County, Chongqing, a typical landslide‐prone area in southwest of China. Firstly, 1624 landslides information from 1980 to 2020 were obtained through field investigation, and a geospatial database of 16 conditional factors had been constructed. Secondly, non‐landslide points were selected to form a complete data set and RF and XGBoost models were established. Finally, the area under the ROC curve (AUC) value, accuracy, and F‐score were used to compare the two models. The results show that even though both classifiers have a highly accurate evaluation of landslide susceptibility, the RF model performs better. In comparison, the RF model has a higher AUC value of 0.866, and its accuracy and F‐score are approximately 2% higher than XGBoost. The land use, elevation, and lithology of Fengjie County contribute to the occurrence of landslides. This is due to human engineering activities (such as land reclamation, and housing construction) resulting in low slope stability and landslides in widely distributed sandstone, siltstone, and mudstone layers owing to their low permeability and planes of weakness.

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Centrifuge modelling of landslides and landslide hazard mitigation: A review

Cited by 125 publications

References 151 publications

Mechanical test and action mechanism of interface between gravel soil and concrete

Mechanical test and action mechanism of interface between gravel soil and concrete

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

Landslide Susceptibility mapping using random forest and extreme gradient boosting: A case study of Fengjie, Chongqing

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