Characteristics and mechanisms of coupled road and rainfall-induced landslide in Sichuan China

He, Kun; Ma, Guotao; Hu, Xiewen; Luo, Gang; Mei, Xuefeng; Liu, Bo; He, X.

doi:10.1080/19475705.2019.1694230

Cited by 25 publications

(5 citation statements)

References 33 publications

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“…Figure 16 shows four typical entrainment modes due to the impacting force: (i) intact impact and scraping, (ii) fragmented impact and plough, (iii) flow-like entrainment, and (iv) overloading and entrainment [38,39]. In the ZHC landslide, after the materials slid from the source area, due to the topographic and material constraints, it loaded successively and accumulated on the middle and lower slopes in the overloading and entrainment zone, thus led to sequent failure continuously [40,41]. This entrainment mode is mainly caused by the energy of the upper landslide, which is similar to the second Baige landslide [37].…”

Section: Discussionmentioning

confidence: 99%

Application of UAV and GB-SAR in Mechanism Research and Monitoring of Zhonghaicun Landslide in Southwest China

Liu

Mei

et al. 2021

Remote Sensing

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This paper presents a recent rainfall-induced landslide in China that occurred on August 21, 2020 and resulted in nine deaths. The sliding material traveled a distance of 800 m, with an altitude difference of about 180 m. A field investigation, remote sensing based on an unmanned aerial vehicle (UAV), in situ monitoring, and a rainfall data analysis were carried out to reveal the deposit characteristics, causative factors, post-landslide behavior, and the mechanism of the landslide. A saltatory micro-relief of the original slope determined the multiple-stage failure type of the slide, and also promoted the entrainment effect during the landslide movement. After the first-initiation sliding stage, the motion of this landslide involved typical progressive movement, and over time, the style of the runout generally turned into a flow-like form. Furthermore, the antecedent cumulative rainfall of 149.5 mm directly contributed to the occurrence of the landslide. Using the GB-SAR early warning system, the post-landslide residual failure was successfully predicted 10 min in advance. The combination of the UAV and GB-SAR technique can surely be beneficial for other inaccessible landslide investigations as well and improves the emergency rescue security.

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Section: Discussionmentioning

confidence: 99%

Application of UAV and GB-SAR in Mechanism Research and Monitoring of Zhonghaicun Landslide in Southwest China

Liu

Mei

et al. 2021

Remote Sensing

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“…In addition, rainfall also reduces the shear strength of the soil and increases the self-weight of the slope. According to a large number of experimental studies (He et al 2019), the internal friction and cohesion will decrease with the increase of water content. The increase of the self-weight of the slope will also promote the force of the slide.…”

Section: Rainfall In Ltration Stagementioning

confidence: 99%

Failure mechanism and stability analysis of bank slope deformation under the synergistic effect of heavy rainfall and blasting vibration

Ming

et al. 2021

Geotech Geol Eng

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Underwater drilling blasting technique is often adopted to clear away the obstructed reef and dredge-cut in the mountainous waterway dredging engineering. However, the vibration of the underwater blasting and excavation of the riverbed has a certain in uence on the stability of bank slopes. Combined with the partial bank collapse phenomenon in the waterway regulation project between two dams in the Three Gorges reservoir area, the change of pore water pressure of unsaturated soil under heavy rainfall and the increase of permanent displacement of soil under blasting vibration in the reservoir area are discussed. This paper explains the weakening effect of rainfall in ltration and blasting vibration on the stability of the bank slope. By studying the law of slope failure deformation under the separate action and coupling action, it is found that rainfall in ltration promotes the increase of slope permanent displacement and the blasting vibration enlarges the in ltration area of the soil, which demonstrated the accelerated failure mechanism of the rainfall-blasting slope.

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“…Diverse failure consequences can be observed in a varying soil slope consisting of weak materials (e.g., weak intercalation layer) because the failure surface tends to seek out the weakest path. In many occasions, due to extensive runout motions of landslides during the post-failure stage, substantial destruction can be observed on nearby structures (Yin et al 2009(Yin et al , 2016, which leads to severe threat and significant damages to human life and properties (Ma et al 2018;He et al 2019;Wang et al 2021). Studying the post-failure responses in heterogeneous soil slopes is rather complicated due to large deformations and interdependencies in spatially varying shear strengths.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty quantification of landslide runout motion considering soil interdependent anisotropy and fabric orientation

Rezania

Nezhad

et al. 2022

Landslides

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Natural soils often exhibit an anisotropic fabric pattern as a result of soil deposition, weathering, or filling. This paper aims to investigate the effect of soil interdependent anisotropy and fabric orientation on runout motions of landslides and evaluate the most critical fabric orientation for the post-failure behavior. The shear strength properties of soil deposit (i.e., cohesion $$c$$ c and friction angle $$\varphi$$ φ ) are modeled as negatively cross correlated bivariate random fields. The results reveal that the spatial variability and the negative cross-correlation of $$c$$ c and $$\varphi$$ φ notably influence the post-failure behavior. In addition, the rotation of soil layer orientation significantly affects the runout motion. Based on the analyses, the deposition orientation of $${30}^{^\circ }$$ 30 ∘ is identified to produce the highest mean value and standard deviation of the runout distance. The findings from this study highlight the importance of considering the orientation of soil stratification, rather than only the magnitude of shear strength, in assessing the post-failure behavior of a landslide.

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Characteristics and mechanisms of coupled road and rainfall-induced landslide in Sichuan China

Cited by 25 publications

References 33 publications

Application of UAV and GB-SAR in Mechanism Research and Monitoring of Zhonghaicun Landslide in Southwest China

Application of UAV and GB-SAR in Mechanism Research and Monitoring of Zhonghaicun Landslide in Southwest China

Failure mechanism and stability analysis of bank slope deformation under the synergistic effect of heavy rainfall and blasting vibration

Uncertainty quantification of landslide runout motion considering soil interdependent anisotropy and fabric orientation

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