Damage evaluation of control works against debris flow: A case study in Wenchuan area

Wentao ZHANG; Jinfeng LIU; Yong YOU; Hao SUN; Huaquan YANG; Ming LU

doi:10.16031/j.cnki.issn.1003-8035.202104015

Volume 33 Issue 4

Aug. 2022

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The Chinese Journal of Geological Hazard and Control > 2022 > 33(4): 77-83. > DOI: 10.16031/j.cnki.issn.1003-8035.202104015

ZHANG Wentao, LIU Jinfeng, YOU Yong, et al. Damage evaluation of control works against debris flow: A case study in Wenchuan area[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(4): 77-83. DOI: 10.16031/j.cnki.issn.1003-8035.202104015

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Damage evaluation of control works against debris flow: A case study in Wenchuan area

Wentao ZHANG^{1, 2, 3,},
Jinfeng LIU^{1, 2, ,},
Yong YOU^{1, 2},
Hao SUN^{1, 2, 3},
Huaquan YANG^{1, 2, 3},
Ming LU^{1, 2, 3}

1.
Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences, Chengdu, Sichuan　610041, China
2.
Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan　610041, China
3.
University of Chinese Academy of Sciences, Beijing　100049 , China

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Received Date: April 10, 2021
Revised Date: May 06, 2021
Available Online: January 27, 2022

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Abstract

Abstract

Geotechnical control engineering is widely used in the treatment of debris flow disasters, and the damage degree of the engineering will have a certain impact on the functionality of the engineering. It affects the continuous exertion of benefits. This paper selects geotechnical control engineering of 18 debris flow gullies in Wenchuan area as the research objects, combined with field investigation, the damage degree of control engineering was evaluated. The system of evaluation index is generally divided into two factors: check dam factor and drainage channel factor. The secondary evaluation indexes are refined, including the damage degree of dam foundation, the damage degree of dam abutment, the damage degree of dam body, scouring degree of foundation, structural impact degree and slope thrust degree. The fuzzy comprehensive evaluation method is used to construct the judgment matrix and membership function, and the damage degree is divided into four grades: excellent, good, medium and poor. The evaluation results show that except for Banzi gully and Dengxi gully, the damage grades of other debris flow control engineering are good or excellent, and the evaluation results are consistent with the field investigation.
- debris flow,
- geotechnical control engineering,
- damage degree,
- evaluation,
- fuzzy comprehensive evaluation method

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Damage evaluation of control works against debris flow: A case study in Wenchuan area

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