中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2022, Vol. 41 ›› Issue (07): 120-125.DOI: 10.3969/j.issn.1674-0696.2022.07.18

• 交通基础设施工程 • 上一篇    下一篇

泥石流危险性评价的权重赋值概率学优化方法

李莉1,张仕昕1,强跃1,郑州1,汪魁2   

  1. (1. 重庆三峡学院 土木工程学院,重庆 404100; 2. 重庆交通大学 河海学院,重庆 400074)
  • 收稿日期:2020-11-24 修回日期:2021-03-04 发布日期:2022-07-25
  • 作者简介:李莉(1982—),女,四川南江人,副教授,硕士,主要从事岩土工程方面的研究。E-mail:lily6636694@163.com
  • 基金资助:
    重庆市教委科技研究项目(KJQN201901221);重庆市教委科技研究项目(HZ2021012);重庆市技术创新与应用发展专项重点项目(cstc2019jscx-tjsbx0015);江西省交通运输厅科技项目(2019Q0027)

Probabilistic Optimization Method for Weight Assignment of Debris Flow Risk Assessment

LI Li1, ZHANG Shixin1, QIANG Yue1, ZHENG Zhou1, WANG Kui2   

  1. (1. School of Civil Engineering, Chongqing Three Gorges University, Chongqing 404100, China; 2. School of River & Ocean, Chongqing Jiaotong University, Chongqing 400074, China)
  • Received:2020-11-24 Revised:2021-03-04 Published:2022-07-25

摘要: 泥石流危险性评价是典型的多准则决策问题。针对泥石流危险性评价问题中权重赋值方法上的不足,从概率学角度提出了一种权重赋值改进方法。在改进方法中,将权重视为一个有界的均匀随机变量,边界条件由等权重法、熵权法及变异系数法计算得到;在边界条件内通过蒙特卡洛模拟策略获取样本权重集,并以最小偏差为优化目标求解最终权重;采用改进方法对云贵高原乌东德地区的20条泥石流危险性进行了评价。评价结果表明:使用单一的权重赋值方法具有一定局限性,对不同类型的泥石流并不具有普适性;改进方法对各评价因子的权重赋值结果更加客观,评价中有5条泥石流危险等级高于传统的刘希林模型结果。

关键词: 地质工程;泥石流;危险性评价;蒙特卡洛模拟;权重;多准则决策

Abstract: Debris flow risk assessment is a typical multi-criteria decision-making problem. Aiming at the deficiencies of the weight assignment method in the debris flow risk assessment problem, an improved weight assignment method from the perspective of probability was proposed. In the improved method, the weight was regarded as a bounded uniform random variable, and the boundary conditions were calculated and obtained by equal weight method, entropy weight method and variation coefficient method. The sample weight set was obtained by Monte Carlo simulation strategy within the boundary conditions, and the final weight was solved with the minimum deviation as the optimization objective. At the same time, the proposed method was applied to the risk assessment of 20 debris flows in the Wudongde area of the Yunnan-Guizhou Plateau. The assessment results show that: the use of a single weight assignment method has certain limitations and is not universal for different types of debris flows. The proposed method is more objective for the weight assignment of each evaluation factor. 5 debris flow hazard levels are higher than the results of the traditional Liu Xilin model.

Key words: geological engineering; debris flow; risk assessment; Monte Carlo simulation; weight; multi-criteria decision

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