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Prevention and Control Methods for Typical Landslide-Induced Waves in the Baihetan Reservoir

Impulsed waves generated by landslide is a geological disaster that cannot be ignored in reservoirs. It is of great practical significance and theoretical value to study the reduction of risk generated by impulse wave.In this paper, we used DEM-SPH coupling method to reproduce the impulse waves expe...

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Published in:Geotechnical and geological engineering 2024-09, Vol.42 (7), p.6655-6669
Main Authors: Xingchen, Dong, Bolin, Huang, Panpan, Qin, lei, Hu, liuyang, Hu, xun, Wang
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Bolin, Huang
Panpan, Qin
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liuyang, Hu
xun, Wang
description Impulsed waves generated by landslide is a geological disaster that cannot be ignored in reservoirs. It is of great practical significance and theoretical value to study the reduction of risk generated by impulse wave.In this paper, we used DEM-SPH coupling method to reproduce the impulse waves experiment of typical accumulation landslide and check the numerical model. Taking Shenjiagou landslide in Baihetan Reservoir area as an example, DEM-SPH numerical model was used to simulate the impulse waves risk under the two prevention measures of heaping on leading edge and cutting the slope to reduce load, and the advantages and disadvantages of the two prevention measures were compared. The study shows that before the treatment, the Shenjiagou landslide enters the water at the maximum velocity of 9.73 m/s, which will form an impulsed wave with amplitude of about 19.7 m. After about 70.71 s, the wave spread to the other side and runup is about 32.4 m, which directly threatened Menggu New Street with an elevation of 840.1 m. The prevention measure of heaping on leading edge can effectively reduce the velocity of the "spoon" landslide with small resistance slide section such as Shenjiagou landslide. Under the condition of the same amount of construction, the effect of impulse wave prevention is better than that of cutting the slope measures. The heaping on leading edge measure changes the accumulate mode of the landslide and increases the landslide volume. The amplitude of impulse wave decreases with the increase of the heaping volume. From the perspective of impulse wave prevention effect, the best prevention scheme of Shenjiagou landslide is to cut 434,000 cubic meters of earth-rock at the rear edge of Shenjiagou landslide, and use it for heaping leading edge. Under this measure, the maximum amplitude of impulse wave can be reduced to 3.5 m, and the maximum run-up on the other side can be reduced to 6.7 m, which can effectively guarantee the safety of Menggu New Street. The research on prevention and control of impulsed wave generated by landslide is a useful supplement to landslide hazard protection, and provides technical support for disaster prevention and mitigation of landslide impulse wave in reservoirs.
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It is of great practical significance and theoretical value to study the reduction of risk generated by impulse wave.In this paper, we used DEM-SPH coupling method to reproduce the impulse waves experiment of typical accumulation landslide and check the numerical model. Taking Shenjiagou landslide in Baihetan Reservoir area as an example, DEM-SPH numerical model was used to simulate the impulse waves risk under the two prevention measures of heaping on leading edge and cutting the slope to reduce load, and the advantages and disadvantages of the two prevention measures were compared. The study shows that before the treatment, the Shenjiagou landslide enters the water at the maximum velocity of 9.73 m/s, which will form an impulsed wave with amplitude of about 19.7 m. After about 70.71 s, the wave spread to the other side and runup is about 32.4 m, which directly threatened Menggu New Street with an elevation of 840.1 m. The prevention measure of heaping on leading edge can effectively reduce the velocity of the "spoon" landslide with small resistance slide section such as Shenjiagou landslide. Under the condition of the same amount of construction, the effect of impulse wave prevention is better than that of cutting the slope measures. The heaping on leading edge measure changes the accumulate mode of the landslide and increases the landslide volume. The amplitude of impulse wave decreases with the increase of the heaping volume. From the perspective of impulse wave prevention effect, the best prevention scheme of Shenjiagou landslide is to cut 434,000 cubic meters of earth-rock at the rear edge of Shenjiagou landslide, and use it for heaping leading edge. Under this measure, the maximum amplitude of impulse wave can be reduced to 3.5 m, and the maximum run-up on the other side can be reduced to 6.7 m, which can effectively guarantee the safety of Menggu New Street. 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The prevention measure of heaping on leading edge can effectively reduce the velocity of the "spoon" landslide with small resistance slide section such as Shenjiagou landslide. Under the condition of the same amount of construction, the effect of impulse wave prevention is better than that of cutting the slope measures. The heaping on leading edge measure changes the accumulate mode of the landslide and increases the landslide volume. The amplitude of impulse wave decreases with the increase of the heaping volume. From the perspective of impulse wave prevention effect, the best prevention scheme of Shenjiagou landslide is to cut 434,000 cubic meters of earth-rock at the rear edge of Shenjiagou landslide, and use it for heaping leading edge. Under this measure, the maximum amplitude of impulse wave can be reduced to 3.5 m, and the maximum run-up on the other side can be reduced to 6.7 m, which can effectively guarantee the safety of Menggu New Street. 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It is of great practical significance and theoretical value to study the reduction of risk generated by impulse wave.In this paper, we used DEM-SPH coupling method to reproduce the impulse waves experiment of typical accumulation landslide and check the numerical model. Taking Shenjiagou landslide in Baihetan Reservoir area as an example, DEM-SPH numerical model was used to simulate the impulse waves risk under the two prevention measures of heaping on leading edge and cutting the slope to reduce load, and the advantages and disadvantages of the two prevention measures were compared. The study shows that before the treatment, the Shenjiagou landslide enters the water at the maximum velocity of 9.73 m/s, which will form an impulsed wave with amplitude of about 19.7 m. After about 70.71 s, the wave spread to the other side and runup is about 32.4 m, which directly threatened Menggu New Street with an elevation of 840.1 m. The prevention measure of heaping on leading edge can effectively reduce the velocity of the "spoon" landslide with small resistance slide section such as Shenjiagou landslide. Under the condition of the same amount of construction, the effect of impulse wave prevention is better than that of cutting the slope measures. The heaping on leading edge measure changes the accumulate mode of the landslide and increases the landslide volume. The amplitude of impulse wave decreases with the increase of the heaping volume. From the perspective of impulse wave prevention effect, the best prevention scheme of Shenjiagou landslide is to cut 434,000 cubic meters of earth-rock at the rear edge of Shenjiagou landslide, and use it for heaping leading edge. Under this measure, the maximum amplitude of impulse wave can be reduced to 3.5 m, and the maximum run-up on the other side can be reduced to 6.7 m, which can effectively guarantee the safety of Menggu New Street. 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subjects Amplitude
Amplitudes
Civil Engineering
Control methods
Cutting
Cutting resistance
Disasters
Earth and Environmental Science
Earth Sciences
Emergency preparedness
Geological hazards
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Landslides
Leading edges
Mathematical models
Measuring instruments
Mitigation
Numerical models
Prevention
Reservoirs
Risk management
Risk reduction
Technical Note
Terrestrial Pollution
Velocity
Waste Management/Waste Technology
Wave resistance
Waves
title Prevention and Control Methods for Typical Landslide-Induced Waves in the Baihetan Reservoir
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