Simulating the process of reservoir-impoundment-induced landslide using the extended DDA method

Jiao, Yu Yong; Zhang, Huan Qiang; Tang, Huiming; Zhang, Xiu Li; Adoko, Amoussou Coffi; Tian, Hu

doi:10.1016/j.enggeo.2014.08.016

Cited by 115 publications

(20 citation statements)

References 24 publications

(24 reference statements)

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“…Thus, the DFN seems to be more suitable to simulate the water flow in fractured rock masses, irrespective of its high demand of computer resource. As a matter of fact, DFN has already been implemented into several numerical methods to simulate water flow in fractured rock masses, such as distinct deformation analysis (DDA) [18,[18][19][20][21][22], numerical manifold method (NMM) [23,24], extended finite element method (XFEM) [25][26][27], and discrete element method (DEM) [28,29]. Compared with other numerical methods, DEM coupled with DFN shows the advantages of simulating water flow through fractured rock masses, since it is capable of simulating coupled hydromechanical effect and, especially, massive fractures.…”

Section: Literature Review About Nuclide Transport Simulationmentioning

confidence: 99%

Implementation of a Time-Domain Random-Walk Method into a Discrete Element Method to Simulate Nuclide Transport in Fractured Rock Masses

Liu

Chan

et al. 2017

Geofluids

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It is essential to study nuclide transport with underground water in fractured rock masses in order to evaluate potential radionuclide leakage in nuclear waste disposal. A time-domain random-walk (TDRW) method was firstly implemented into a discrete element method (DEM), that is, UDEC, in this paper to address the pressing challenges of modelling the nuclide transport in fractured rock masses such as massive fractures and coupled hydromechanical effect. The implementation was then validated against analytical solutions for nuclide transport in a single fracture and a simple fracture network. After that, the proposed implementation was applied to model the nuclide transport in a complex fracture network investigated in the DECOVALEX 2011 project to analyze the effect of matrix diffusion and stress on the nuclide transport in the fractured rock masses. It was concluded that the implementation of the TDRW method into UDEC provided a valuable tool to study the nuclide transport in the fractured rock masses. Moreover, it was found that the total travel time of the nuclide particles in the fractured rock masses with the matrix diffusion and external stress modelled was much longer than that without the matrix diffusion and external stress modelled.

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Section: Literature Review About Nuclide Transport Simulationmentioning

confidence: 99%

Implementation of a Time-Domain Random-Walk Method into a Discrete Element Method to Simulate Nuclide Transport in Fractured Rock Masses

Liu

Chan

et al. 2017

Geofluids

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“…Historical statistics show that in general, over 90% of reservoir-induced landslides are caused by the fluctuations of reservoir water level, and approximately 50% occurred during the period of impoundment [1][2][3][4]. More than 80% occurred during the first 3 to 5 years after the construction of the dam [1].…”

Section: Introductionmentioning

confidence: 99%

“…Erosions of loose debris at the slope toe by flow, instant pore water pressure generation in the slope by the drawdown of reservoir water level, and structural and strength reduction of the hydrofluctuation belt are the main reasons of triggering reservoir landslides [1,[4][5][6]. By conducting numerical analysis [6,7], the risk management of potential impulse wave by the slope movement also draws more attentions.…”

Section: Introductionmentioning

confidence: 99%

“…Conducting the comprehensive monitoring program on reservoir landslides is the key issue of obtaining the in situ data, which set the basis for conducting the more comprehensive analysis and simulations. The periodic geological inspections are recommended to monitor the deformation and hydrogeological condition of the slope during the process of reservoir water level fluctuation [4,11].…”

Section: Introductionmentioning

confidence: 99%

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The Monitoring-Based Analysis on Deformation-Controlling Factors and Slope Stability of Reservoir Landslide: Hongyanzi Landslide in the Southwest of China

et al. 2018

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Reservoir landslide is a type of commonly seen geological hazards in reservoir area and could potentially cause significant risk to the routine operation of reservoir and hydropower station. It has been accepted that reservoir landslides are mainly induced by periodic variations of reservoir water level during the impoundment and drawdown process. In this study, to better understand the deformation characters and controlling factors of the reservoir landslide, a multiparameter-based monitoring program was conducted on a reservoir landslide-the Hongyanzi landslide located in Pubugou reservoir area in the southwest of China. The results indicated that significant deformation occurred to the landslide during the drawdown period; otherwise, the landslide remained stable. The major reason of reservoir landslide deformation is the generation of seepage water pressure caused by the rapidly growing water level difference inside and outside of the slope. The influences of precipitation and earthquake on the slope deformation of the Hongyanzi landslide were insignificant.

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“…In the Three Gorges Reservoir Area of China, there are about 664 landslides which are affected by the reservoir water level, and hydrodynamic conditions such as rainfall and reservoir water level variation have different degrees of impact on the stability of these landslides [1][2][3][4][5]. A key issue is about fluidsolid coupling when considering the effects of hydrodynamic conditions on the landslide in the Three Gorges Reservoir Area.…”

Section: Introductionmentioning

confidence: 99%

The Coupling Effect of Rainfall and Reservoir Water Level Decline on the Baijiabao Landslide in the Three Gorges Reservoir Area, China

Zhao

et al. 2017

Geofluids

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Rainfall and reservoir level fluctuation are two of the main factors contributing to reservoir landslides. However, in China's Three Gorges Reservoir Area, when the reservoir water level fluctuates significantly, it comes at a time of abundant rainfall, which makes it difficult to distinguish which factor dominates the deformation of the landslide. This study focuses on how rainfall and reservoir water level decline affect the seepage and displacement field of Baijiabao landslide spatially and temporally during drawdown of reservoir water level in the Three Gorges Reservoir Area, thus exploring its movement mechanism. The monitoring data of the landslide in the past 10 years were analyzed, and the correlation between rainfall, reservoir water level decline, and landslide displacement was clarified. By the numerical simulation method, the deformation evolution mechanism of this landslide during drawdown of reservoir water level was revealed, respectively, under three conditions, namely, rainfall, reservoir water level decline, and coupling of the above two conditions. The results showed that the deformation of the Baijiabao landslide was the coupling effect of rainfall and reservoir water level decline, while the latter effect is more pronounced.

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Simulating the process of reservoir-impoundment-induced landslide using the extended DDA method

Cited by 115 publications

References 24 publications

Implementation of a Time-Domain Random-Walk Method into a Discrete Element Method to Simulate Nuclide Transport in Fractured Rock Masses

Implementation of a Time-Domain Random-Walk Method into a Discrete Element Method to Simulate Nuclide Transport in Fractured Rock Masses

The Monitoring-Based Analysis on Deformation-Controlling Factors and Slope Stability of Reservoir Landslide: Hongyanzi Landslide in the Southwest of China

The Coupling Effect of Rainfall and Reservoir Water Level Decline on the Baijiabao Landslide in the Three Gorges Reservoir Area, China

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