The Influence of an EPS Concrete Buffer Layer Thickness on Debris Dams Impacted by Massive Stones in the Debris Flow

Yu, Xianbin; Chen, Xiaoqing; Zhao, Wanyu; Chen, Jiangang

doi:10.1155/2015/463640

Cited by 7 publications

(9 citation statements)

References 6 publications

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“…Since M i � _ H i , the rotational motion of a clump can be found by simultaneously solving Equations (4) and (5). e equation for translational motion can be written in the following form:…”

Section: Equations Of Motion For a Clumpmentioning

confidence: 99%

“…Over the years, various engineering measures have been used to mitigate or prevent natural granular flow disasters. Common prevention and control measures generally include civil engineering works such as check dams, grid-type dams, lateral walls, deflection and terminal walls, and berms or barriers that control debris flows [4,5]. However, if the prevention and control engineering measures fail due to unreasonable engineering layout or insufficient project argument, they may cause more serious damage and loss [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Research on the Obstruction Process of Rigid Netting Barriers toward Granular Flow

Fan

2019

Advances in Civil Engineering

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With the advantages of a simple structure and rapid construction, the rigid netting barrier (RNB) exerts a good obstruction effect on granular flow and is a common engineering measure used to prevent geological disasters in the form of granular flows. However, due to the limitations of current measuring and testing techniques, it is difficult to obtain an accurate measurement of the granular flow velocity and the impact force of granular flow on the mesh structures that are of primary concern in the design of protective structures. To study the characteristics of the obstruction process of RNBs toward granular flow, a typical impact experiment involving granular flow was numerically simulated by the discrete element method, and the correctness and effectiveness of the calculation method were also verified. On this basis, the discrete element method was applied to simulate the obstruction process affecting granular flow under different RNB setting conditions, and the calculation results clearly present the phenomena that occur during the obstruction process of RNBs toward granular flow, such as “run-up,” “overflow,” “passing-through,” and “grain-size segregation.” By analyzing the effects of these phenomena on the obstruction efficiency and the time history of the forces acting on the RNB, the rational setting of an RNB was further discussed. This study can provide a reference for the engineering application of RNB.

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Section: Equations Of Motion For a Clumpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Obstruction Process of Rigid Netting Barriers toward Granular Flow

Fan

2019

Advances in Civil Engineering

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“…Previous investigations have shown that there are two effective measures to improve the resistance to impacts and shock waves: thickening the structure layer 1 and developing new materials. 2,3 However, thickening the structure layer is not the best solution, which also increases the cost. Consequently, it is necessary to conduct further research to develop new materials with excellent energy absorbing performance.…”

Section: Introductionmentioning

confidence: 99%

Basalt fiber reinforced porous expanded polystyrene-ceramsite concrete wrapped with a brass strip

Bai

et al. 2017

RSC Adv.

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This paper aims to study the effect of brass strip wrapping on the dynamic performance of basalt fiber reinforced porous expanded polystyrene-ceramsite concrete (BECC). The specimens of BECC-B were prepared by wrapping those of BECC with brass strips. A F 100 mm split Hopkinson pressure bar (SHPB) apparatus was used to conduct dynamic experiments. The stress-strain curves of BECC and BECC-B were systematically analyzed. The mechanical properties, including strength properties, deformation properties and failure patterns were studied. Based on these, the energy absorbing properties were explored. The results show that the stress-strain curves have three periods: an elastic period, plateau period and declining period. Moreover, the plateau period of BECC-B is more obvious than that of BECC. The mechanical properties of BECC-B are more sensitive to strain rate than those of BECC.Analysis of the energy absorbing properties indicates that the specimens of BECC-B can absorb much more energy than those of BECC under the same strain rate. To sum up, BECC-B is a promising energy absorbing material, which can be used as the distribution layers in defensive engineering.

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“…Debris flow is a natural process and stopping such a natural phenomenon is impossible; however, mitigation measures can be undertaken to lessen the impact of hazards and human injuries. Traditional ideas consider constructing civil engineering works such as check dams, gridtype dams, lateral walls, deflection and terminal walls, berms or barriers to control debris flows (Van Dine, 1996;Yu et al, 2015), but they are still far from reliable. At present, the management of debris flows is carried out by the processes of blocking, preventing and draining in many countries.…”

Section: Introductionmentioning

confidence: 99%

“…At present, the management of debris flows is carried out by the processes of blocking, preventing and draining in many countries. 'Blocking' means building various kinds of check dams in the transportation zone of a channelized debris flow in order to decrease the channel gradient locally, minimise scour along the bottom and sides of the stream steep, intercept solid particles in the debris flow and reduce its destructive power in downstream areas (Van Dine, 1996;Yu et al, 2015;Zhang et al, 2011a); 'Preventing' works consist of collecting wells and drainage pipes, which are the standard method to stabilise slowly moving or intermittently moving landslide masses in debris flow catchments and prevent landslides from transforming into debris flows (Takahashi, 2007;Zhang et al, 2011a); 'Draining' works include impediments to flow, lateral walls and deflection walls, they are used primarily to constrain the lateral movement of a debris flow, direct debris flow to travel along the desired path, and thereby protect an area of alluvial fan or structures on alluvial fan (Van Dine, 1996;Zhang et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of debris flow mitigation strategies in mountainous regions

Xiong

Meng

Wang

et al. 2016

Progress in Physical Geography: Earth and Environment

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Debris flows represent major hazards in most mountainous regions of the world where they repeatedly result in disasters. In order to protect people and infrastructure against future debris flows, many debris flow catchments have been artificially intervened by employing various mitigation measures, including civil engineering works. However, the commonly adapted engineering measures, such as check dams, are not effective for every debris flow catchment, and the failure of such measures even causes more damage, e.g. the Sanyanyu debris flow catchment in Zhouqu, China, killed 1756 people. In order to research the effectiveness of engineering strategies and explore much more effective mitigation works for debris flows in the mountainous regions, we took the Bailong River catchment of Southern Gansu of China as study area, with special emphasis on Sanyanyu debris flow catchment (with civil engineering works) and Goulinping debris flow catchment (without civil engineering works), and comparatively analysed the two catchments. The comparative results show that both catchments have similar material source, geomorphological/environmental and climatic conditions, however, vegetation cover and rock hardness are poorer in Goulinping than in Sanyanyu, the catchment that underwent larger-scale debris flows, suggesting that the mitigation measures had been applied in Sanyanyu catchment were inappropriate. Subsequently, we simulated the effectiveness of controlling debris flow peak discharge with check dams at the lower part of Sanyanyu and Goulinping catchment using the Kanako simulator, and summarised argument based on the hypothesis and facts from positive and negative aspects. We draw the conclusion that it is not reasonable to build check dams in the two catchments and instead, drainage channels should be primarily considered for reducing debris flow hazards in such densely populated areas. Finally, we undertook detailed field investigations and experiments on the native plants in the region, and found that the ecological mitigation measure with planting Robinia Pseudoacacia on the debris flow deposits is an effective method to alleviate debris flow hazards. It is concluded that channel works combined with ecological measures are the preferable approaches to minimize the debris flow damage in debris flow catchments characterised with high mountains, concentrated rainfalls and active neotectonic movement.

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The Influence of an EPS Concrete Buffer Layer Thickness on Debris Dams Impacted by Massive Stones in the Debris Flow

Cited by 7 publications

References 6 publications

Research on the Obstruction Process of Rigid Netting Barriers toward Granular Flow

Research on the Obstruction Process of Rigid Netting Barriers toward Granular Flow

Basalt fiber reinforced porous expanded polystyrene-ceramsite concrete wrapped with a brass strip

Effectiveness of debris flow mitigation strategies in mountainous regions

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