Simulation of the sliding process of Donghekou landslide triggered by the Wenchuan earthquake using a distinct element method

Li, Xinpo; He, Siming; Luo, Yi; Wu, Yong

doi:10.1007/s12665-011-0953-8

Cited by 59 publications

(16 citation statements)

References 23 publications

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“…Acknowledging the high mobility nature of Donghekou landslide, Li et al (2012) simulated its kinematic behavior, and concluded that a low friction coefficient (about 0.1) is required to justify its mobility. Zhou et al (2013) concluded that the maximum amplification coefficient of dynamic acceleration for the Donghekou landslide is approximately 3.909, and the sliding mass was triggered with a small initial velocity when it detached from the upper slope.…”

Section: Geotechnical Properties and Landslide Mobilitymentioning

confidence: 99%

A large landslide triggered by the 2008 Wenchuan (M8.0) earthquake in Donghekou area: Phenomena and mechanisms

Wang

Huang

Lourenço

et al. 2014

Engineering Geology

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During the 2008 Wenchuan earthquake, more than 60,000 landslides were triggered, resulting in about 20,000 casualties. Among these landslides, a catastrophic one occurred in Donghekou area of Qingchuan County. Donghekou landslide had a volume of about 1×10 7 m 3 , traveled fast for approximately 2 km, killing about 780 people. The source area consisted of unstable sedimentary strata and the runout path was made of colluvial deposits. During the earthquake, the colluvial deposits started to move first, before the arrival of the displaced landslide debris from the main source area. We performed undrained cyclic ring shear tests on samples taken from the runout path and concluded that liquefaction of the runout path material enhanced the mobility of the debris material. A fumarole was identified on the upper part of the runout path 6 months later. We analyzed the gas and water venting out, and concluded that the fumarole was not the result of fault movement; it resulted instead from the weathering of slate from the source area. The long-travel landslide materials blocked two rivers, forming two landslide dams that breached with the occurrence of overtopping. To better understand the internal structure of the landslide deposits and then provide evidence for a rational plan of countermeasures to stabilize the landslide dams, we measured the shear-wave-velocity of the landslide deposits by a surface-wave technique called multichannel analysis of surface waves (MASW). The results revealed that the landslide dams consisted

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Section: Geotechnical Properties and Landslide Mobilitymentioning

confidence: 99%

A large landslide triggered by the 2008 Wenchuan (M8.0) earthquake in Donghekou area: Phenomena and mechanisms

Wang

Huang

Lourenço

et al. 2014

Engineering Geology

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“…Meanwhile, numerical simulations based on various investigations were also applied to analyze the movement processes (Li et al, 2012;Zhang et al, 2012). However, the kinematic processes controlling the moving mass and the mechanism for some special phenomena associated with this huge landslide are still poorly understood because of the complicated movement processes and unique type.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Yuan

Tang

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. The huge Donghekou landslide was triggered by the Wenchuan earthquake in 2008 with about 2.4 × 10 7 m 3 of rock displaced. The landslide is considered as an example of an earthquake-induced "ejection" event, where dislocated slope materials was expelled over a section of the slope, but the kinematic processes are not well understood. We used the 2-D granular discrete element method to characterize the kinematic behavior and mechanics of this "ejection landslide". The initial boundary conditions were applied along the ball-wall contacts by using derived velocities integrated from strong motion data with a duration of 125 s, including the peak acceleration near the Donghekou area. The constraints were primarily determined from the final geometry of the landslide and geological structures to account for the actual landslide characteristics. Simulated results showed that the large local seismic acceleration and a free face under the sliding body, caused by the dip difference between the upper slide face and the natural slope, originated from the activation of the landslide. For the lower sliding body, its kinematic mechanism was changed during sliding. Initially it was a push-type landslide, and then gradually changed to a retrogressive landslide. The eroded bed on the slope during the landslide had the potential of slightly increasing the runout distance from 1435 to 1519 m, and was predicted in the numerical simulation.

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“…Several models have been developed and applied to practical work. They use the discontinuous deformation analysis (DDA) method 29–31 , the finite element method (FEM) 32,33 , the discrete element method (DEM) 34,35 , the smoothed particle hydrodynamics method (SPH) 7,9 , to analyse the stability and simulate the failure process of the landslide. Some other studies also incorporate hydraulically based models to simulate landslide behaviour, such as DDA-SPH coupled method 36 and shallow water assumption-based model 37 .…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of landslide stability and related countermeasures: a case study of the Lanmuxi landslide in China

Han

et al. 2019

Sci Rep

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We report on a comprehensive method for analyzing landslide stability and the mitigation effect of countermeasures in this paper. The proposed method is a combination of theoretical method and numerical method. To address the uncertainties of the soil strength parameters, the rational values of these parameters are comprehensively determined by the back-analysis result of the reliability method and the result by the quantitative method, as well as the in-situ geological test. To evaluate the slope stability, the limit analysis using the 2D upper bound method and the FEM simulation using strength reduction method are performed, respectively. In order to illustrate the presented method, the so-called Lanmuxi landslide in China is selected as a case study. Results demonstrated that the stress and strain majorly concentrated at the toe and crown of the slope. According to the analysis results, countermeasures consisting of anchor lattice beams, landslide piles, and cracks filling, are suggested to reduce the failure risk of the landslide. Effect assessment based on the FEM analysis verifies the feasibility and effectiveness of the recommended countermeasures.

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Simulation of the sliding process of Donghekou landslide triggered by the Wenchuan earthquake using a distinct element method

Cited by 59 publications

References 23 publications

A large landslide triggered by the 2008 Wenchuan (M8.0) earthquake in Donghekou area: Phenomena and mechanisms

A large landslide triggered by the 2008 Wenchuan (M8.0) earthquake in Donghekou area: Phenomena and mechanisms

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Comprehensive analysis of landslide stability and related countermeasures: a case study of the Lanmuxi landslide in China

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