考虑拦挡坝抗灾能力的泥石流危险性评价

李永威; 徐林荣; 商拥辉; 陈舒阳

doi:10.3799/dqkx.2023.035

Volume 49 Issue 8

Aug. 2024

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Li Yongwei, Xu Linrogn, Shang Yonghui, Chen Shuyang, 2024. Debris Flow Hazard Evaluation under the Influence of Retaining Dam. Earth Science, 49(8): 2839-2850. doi: 10.3799/dqkx.2023.035

Citation:

Li Yongwei, Xu Linrogn, Shang Yonghui, Chen Shuyang, 2024. Debris Flow Hazard Evaluation under the Influence of Retaining Dam. Earth Science, 49(8): 2839-2850. doi: 10.3799/dqkx.2023.035

Li Yongwei, Xu Linrogn, Shang Yonghui, Chen Shuyang, 2024. Debris Flow Hazard Evaluation under the Influence of Retaining Dam. Earth Science, 49(8): 2839-2850. doi: 10.3799/dqkx.2023.035

Citation:

Li Yongwei, Xu Linrogn, Shang Yonghui, Chen Shuyang, 2024. Debris Flow Hazard Evaluation under the Influence of Retaining Dam. Earth Science, 49(8): 2839-2850. doi: 10.3799/dqkx.2023.035

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Debris Flow Hazard Evaluation under the Influence of Retaining Dam

doi: 10.3799/dqkx.2023.035

Li Yongwei^{1, 2
,},
Xu Linrogn^{1, 2
,
,},
Shang Yonghui^{1, 2},
Chen Shuyang³

1.
School of Civil Engineering, Central South University, Changsha 410075, China
2.
National Engineering Research Center of High-Speed Railway Construction Techology, Central South University, Changsha 410075, China
3.
School of Civil Engineering, Central South University of Forestry and Technology, Changsha 410004, China

Received Date: 2022-04-04
Available Online: 2024-08-27
Publish Date: 2024-08-25

Abstract

Abstract

The debris flow hazard was more serious with the increase of occurrence probability of low-frequency debris flow after the earthquake. Resulting in the damage of retaining dam and reduction of its capabilities in disaster prevention and reduction. But few studies payed attention to the influence of retaining dam on debris flow hazard. Moreover, disaster-pregnant factors were usually used as the index of debris flow hazard, but the result of hazard evaluation could not completely reflect the destructive power and intensity of debris flow. Thus, the dynamic parameters of debris flow and the stability coefficient of retaining dam in different return periods were calculated in Chutou gully. And the debris flow hazard was evaluated based on dynamic parameters of debris flow and improved entropy method. And the control relationship between retaining dam and debris flow hazard was analyzed. The study findings were as follows: Reasonable evaluation results could be obtained by dynamic parameters and improved entropy method. The values of debris flow hazard were decreased about 12.27%~43.75% with different return periods (1%, 2%, 5% and 10%) under the influence of the retaining dam, due to the discharge of debris flow was decreased below the retaining dam. This work may provide some new clues for prevention and control of debris flow and optimum design of retaining dam.
- retaining dam,
- dynamic parameters,
- improved entropy method,
- debris flow hazard,
- engineering geology

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References(53)

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Debris Flow Hazard Evaluation under the Influence of Retaining Dam

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