Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests
In this study, the failure behaviors of debris flows were studied by flume model tests with artificial rainfall and numerical simulations (PFC3D). Model tests revealed that grain sizes distribution had profound effects on failure mode, and the failure in slope of medium sand started with cracks at c...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/603130 |
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| author | Jian Zhou Ye-xun Li Min-cai Jia Cui-na Li |
| author_facet | Jian Zhou Ye-xun Li Min-cai Jia Cui-na Li |
| author_sort | Jian Zhou |
| collection | DOAJ |
| description | In this study, the failure behaviors of debris flows were studied by flume model tests with artificial rainfall and numerical simulations (PFC3D). Model tests revealed that grain sizes distribution had profound effects on failure mode, and the failure in slope of medium sand started with cracks at crest and took the form of retrogressive toe sliding failure. With the increase of fine particles in soil, the failure mode of the slopes changed to fluidized flow. The discrete element method PFC3D can overcome the hypothesis of the traditional continuous medium mechanic and consider the simple characteristics of particle. Thus, a numerical simulations model considering liquid-solid coupled method has been developed to simulate the debris flow. Comparing the experimental results, the numerical simulation result indicated that the failure mode of the failure of medium sand slope was retrogressive toe sliding, and the failure of fine sand slope was fluidized sliding. The simulation result is consistent with the model test and theoretical analysis, and grain sizes distribution caused different failure behavior of granular debris flows. This research should be a guide to explore the theory of debris flow and to improve the prevention and reduction of debris flow. |
| format | Article |
| id | doaj-art-7b16f05658974ee8b971c5d8d94c5d97 |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-7b16f05658974ee8b971c5d8d94c5d972025-02-03T05:44:47ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/603130603130Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model TestsJian Zhou0Ye-xun Li1Min-cai Jia2Cui-na Li3Department of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaIn this study, the failure behaviors of debris flows were studied by flume model tests with artificial rainfall and numerical simulations (PFC3D). Model tests revealed that grain sizes distribution had profound effects on failure mode, and the failure in slope of medium sand started with cracks at crest and took the form of retrogressive toe sliding failure. With the increase of fine particles in soil, the failure mode of the slopes changed to fluidized flow. The discrete element method PFC3D can overcome the hypothesis of the traditional continuous medium mechanic and consider the simple characteristics of particle. Thus, a numerical simulations model considering liquid-solid coupled method has been developed to simulate the debris flow. Comparing the experimental results, the numerical simulation result indicated that the failure mode of the failure of medium sand slope was retrogressive toe sliding, and the failure of fine sand slope was fluidized sliding. The simulation result is consistent with the model test and theoretical analysis, and grain sizes distribution caused different failure behavior of granular debris flows. This research should be a guide to explore the theory of debris flow and to improve the prevention and reduction of debris flow.http://dx.doi.org/10.1155/2013/603130 |
| spellingShingle | Jian Zhou Ye-xun Li Min-cai Jia Cui-na Li Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests The Scientific World Journal |
| title | Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests |
| title_full | Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests |
| title_fullStr | Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests |
| title_full_unstemmed | Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests |
| title_short | Numerical Simulation of Failure Behavior of Granular Debris Flows Based on Flume Model Tests |
| title_sort | numerical simulation of failure behavior of granular debris flows based on flume model tests |
| url | http://dx.doi.org/10.1155/2013/603130 |
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