Investigating a potential reservoir landslide and suggesting its treatment using limit-equilibrium and numerical methods

Babanouri, Nima; Dehghani, Hesam

doi:10.1007/s11629-016-3898-2

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…Numerical methods have been an important addition to traditional slope research methods for investigation of the dynamic response of rock slopes (Wakai et al, 2008). Numerical methods have been developed and applied because of their enhanced ability to simulate actual failure mechanisms (Quecedo, 2004;Babanouri, 2017). However, these methods are di cult to apply owing to the lack of earthquake recordings resulting from the random occurrence of earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Evolution Mechanism of A Rock Slope with Discontinuities Under Earthquake Motions Using Shaking Table Tests

Zhou

Che

Zhu

2021

Preprint

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Under the impact of earthquake, even if the slopes do not fail, the integrity of rock slope structure would be damaged subjected to the seismic motion. The process of damage, destruction and failure for slopes is characterized by the dynamic evolution of stability. In the areas with active tectonic activities, frequent earthquakes have a significant effect on the attenuation of slope stability. To investigate the dynamic evolution of a rock slope under earthquake motions, a series of shaking table tests were performed. An artificial synthetic earthquake seismic wave was adopted to investigate the horizontal acceleration response. The results show that the wave field propagation results in MPGA values for the slope body above the tuff structural surface are larger than those inside the slope, and a maximum value of 3.7 is observed at slope crest. The structural surface results in a mutation of the acceleration response, which is not conducive to the slope stability. The modeled slope entered the plastic stage (input motion of 2.97 m/s2) earlier than landslides occurred (input motion of 4.46 m/s2). In addition, the safety factor of the sliding blocks was calculated based on pseudo static analysis. A good correspondence was found between the safety factors and the failure mode of the slope. The damage evolution process for the rock slope can be divided into three stages: an elastic stage (Ks=1.6–4.7), a plastic stage (Ks=0.8–1.6), and a damage stage (Ks<0.8).

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Section: Introductionmentioning

confidence: 99%

Dynamic Evolution Mechanism of A Rock Slope with Discontinuities Under Earthquake Motions Using Shaking Table Tests

Zhou

Che

Zhu

2021

Preprint

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“…A large number of massive hydropower stations have been constructed in south-western China, including the Jinping-I and Jinping-II Hydropower Stations on the Yalong River, the Dagangshan Hydropower Station on the Dadu River, the Maoergai Hydropower Station on the Heishui River and the Three Gorges Hydropower Station on the Yangtze River (Zhou et al 2010;Jiao et al 2014;Gui et al 2016;Yin et al 2016). After the construction of a high dam, the water storage and constantly fluctuating water have an adverse influences on slope alone the river banks and lead to changes in the local climate and ecological environment (Wang et al 2004;Mazaeva et al 2013;Zhou et al 2016b) to accelerate the adverse influences on safety of slope (Hu et al 2015;Babanouri and Dehghani 2017;Sun et al 2017). These reservoir landslides pose a great threat to the safety of hydropower stations (especially high dams), coastal infrastructure and human life.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

Zhang

Yang

et al. 2018

Geomatics, Natural Hazards and Risk

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Reservoir impoundment and water fluctuations have endangered the stability of the reservoir bank slopes, which have experienced several small-scale shallow slides/collapses and few large-scale slopes with failures/deformations. Field investigations, unmanned aerial vehicle technology and site displacement monitoring dates are used to study the spatiotemporal distribution and mechanisms of the reservoir landslides within the Dagangshan reservoir. The reservoir landslides can be divided into two main types: shallow small-scale slides and unstable deformation slopes, which are clearly associated with reservoir impoundment and fluctuations of the water level. Small-scale slides/collapses are continually distributed along the river banks nearest to the water level, but deepseated landslides have usually experienced a long history, and some obvious precursor phenomena may exist in the slopes. According to the recognition of deformational and failure evolutionary processes of large-scale slopes, and based on hydrology and geomechanics, two types of potential failure models (creep-shear-tension failure and toppling-tensile-shear model) are proposed to interpret the mechanisms of the deformation slopes in the Dagangshan reservoir. Furthermore, some preliminary discussion is presented concerning the non-significant development of landslides in the Dagangshan reservoir that are also associated with smaller water fluctuations due to the daily regulation type of the reservoir.

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“…Subsequent to the Vaiont landslide disaster, the impact of reservoir impoundment on bank stability has been widely investigated and acknowledged (Fujita, 1977;Saint-Laurent et al, 2001;Zhang et al, 2006;Wang and Yan, 2007;Luo et al, 2008;Paronuzzi et al, 2013;Johansson and Edeskär, 2014;Yang et al, 2014;Xia et al, 2015;Kaczmarek et al, 2016;Sun et al, 2017a;2017b). It is evident that the construction of water conservancy projects and reservoir impoundment are critical factors that cause collapses and landslides (CLs), therefore the geohazards in any reservoir area pose an important threat to the productive life and the safe operation of the reservoir (Paronuzzi and Bolla, 2012;Xia et al, 2013;Yuan et al, 2013;Song et al, 2015;Babanouri and Dehghani, 2017;Zhou et al, 2017). In general, bank erosion is mainly caused by natural factors, such as heavy rainfall and earthquakes, anthropogenic activities, such as deforestation, road operation, mining and construction (Iverson, 2000;Pradhan and Lee, 2010;Xu et al, 2012;Alimohammadlou et al, 2013;Duan et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

Zhong

et al. 2018

Chin. Geogr. Sci.

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The southwest alpine gorge region is the major state base of hydropower energy development in China and hence planned many cascading hydropower stations. After the reservoir impoundment, the intense water level fluctuations under the interaction of cascade dams operating and the mountainous flooding, usually cause bank collapse, landslide and debris flow hazards. The Xiaowan reservoir (XWR), for example, as the 'dragon head' meg reservoir located in the middle mainstream of Lancang River, have resulted in a series of geohazards during its building and operating. In this study, we investigated the number and surface area of collapses and landslides (CLs) occurred in the water level fluctuations zone (WLFZ) of XWR using remote sensing images of Gaofen-1 and Google Earth; evaluated the CLs susceptibility using information value method. The results presented that the total WLFZ area of 87.03 km 2 and 804 CLs masses with a total area of 1.98 km 2 were identified in the riparian zone of XWR. CLs mainly occurred at an elevation of 1190-1240 m, and the CLs density increased with an increase in altitude. The WLFZ with a slope gradient of 25°-45° is the main CLs distribution area that accounts for more than half of the total CLs area. The susceptibility assessment revealed that high and very high susceptibility zones are generally distributed along zones with an elevation of 1210-1240 m, a slope degree of 25°-45° and a slope aspect perpendicular to the direction of Lancang River. Furthermore, these susceptible zones are close in distance to the dam site and tend to be in the riparian zones with the formation lithology of Silurian strata. These results provide a valuable contribution to prevent and control geohazards in the XWR area. Moreover, this study offers a constructive sample of geohazards assessment in the riparian zone of large reservoirs throughout the mountains of southwest China.

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Investigating a potential reservoir landslide and suggesting its treatment using limit-equilibrium and numerical methods

Cited by 12 publications

References 21 publications

Dynamic Evolution Mechanism of A Rock Slope with Discontinuities Under Earthquake Motions Using Shaking Table Tests

Dynamic Evolution Mechanism of A Rock Slope with Discontinuities Under Earthquake Motions Using Shaking Table Tests

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

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