吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (6): 1773-1781.doi: 10.13229/j.cnki.jdxbgxb.20230069

• 交通运输工程·土木工程 • 上一篇    

泥石流作用下道路结构韧性分析及提升

薛志佳1(),王召阳1,张久鹏1(),晏长根1,许子凯1,张英立1,黄晓明2,马涛2   

  1. 1.长安大学 公路学院，西安 710064
    2.东南大学 交通学院，南京 211189
  • 收稿日期:2023-01-28 出版日期:2023-06-01 发布日期:2023-07-23
  • 通讯作者: 张久鹏 E-mail:xuegeneral@126.com;zhjiupeng@chd.edu.cn
  • 作者简介:薛志佳（1990-），男，副教授，博士.研究方向：公路岩土工程.E-mail：xuegeneral@126.com
  • 基金资助:
    国家重点研发计划项目(2021YFB2600602);国家自然科学基金青年基金项目(41902280);陕西省高校科协青年人才托举计划项目(20210422);中国博士后科学基金项目(2022M710486);陕西省自然科学基础研究计划项目(2023-JC-QN-0445);长安大学中央高校基本科研业务费项目(300102212101)

Toughness analysis and improvement of road structure under action of debris flow

Zhi-jia XUE1(),Zhao-yang WANG1,Jiu-peng ZHANG1(),Chang-gen YAN1,Zi-kai XU1,Ying-li ZHANG1,Xiao-ming Huang2,Tao Ma2   

  1. 1.School of Highway，Chang'an University，Xi'an 710064，China
    2.School of Transportation，Southeast University，Nanjing 211189，China
  • Received:2023-01-28 Online:2023-06-01 Published:2023-07-23
  • Contact: Jiu-peng ZHANG E-mail:xuegeneral@126.com;zhjiupeng@chd.edu.cn

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摘要：

针对道路结构抗灾韧性研究的不足，提出了泥石流冲击和淤埋作用下的道路结构性能响应函数，通过分析泥石流防治特征和道路结构韧性特征对其进行求解，并用泥石流作用后道路结构性能的累积损失程度表征其安全韧性，构建了道路结构安全韧性理论模型。以甘肃省沙湾镇水峪沟泥石流为例，分析了水峪沟国道394 km+800 m处道路结构在自我恢复、灾中采取抵御措施、灾后应急处理3种情况下的韧性曲线和安全韧性。结果表明：未采取任何措施时，道路结构安全韧性值仅为63.92%；而对泥石流灾害采取应急处理后，道路结构应对灾害的能力提升至81.98%；对泥石流采取抵御措施后，道路结构应对灾害的能力进一步提升至85.76%，韧性得到了明显提升。本文研究成果量化了泥石流作用下道路结构的抵抗力和恢复力，可为提升泥石流作用下的道路结构韧性提供决策依据。

关键词: 交通运输系统工程, 道路结构, 韧性提升, 泥石流灾害, 抵御措施

Abstract:

Due to the deficiency of the study on the resilience of road structure， the response function of road structure performance under the impact and siltation of debris flow was proposed. And the response function was solved by analyzing the characteristics of debris flow protection and toughness of road structure. Furthermore， the cumulative loss degree of road structure performance after debris flow is used to characterize the safety toughness， and a theoretical model of road structure safety toughness is established. Taking Shuiyugou debris flow in Shawan Town， Gansu Province as an example， the toughness curve and safety toughness of road structure at 394 km+800 m of Shuiyugou National Road was analyzed. The results show that the safety toughness value of road structure is only 63.92% when no measures are taken. After taking the emergency treatment， the safety toughness value of road structure increased to 81.98%. After taking measures to resist debris flow， the ability of road structure to deal with disasters further increased to 85.76%， which significantly improved the toughness. The results quantified the resistance and resilience of road structure under the impact and siltation of debris flow and provided a decision basis for improving the toughness of road structure under the impact and siltation of debris flow.

Key words: engineering of communications and transportation system, road structure, toughness improvement, debris flow, defensive measures

中图分类号: 

  • U491

图1

以“稳”为主的综合治理方案"

图2

以“拦”为主的综合治理方案"

图3

以“排”为主的综合治理方案"

图4

道路结构韧性曲线"

表1

水峪沟国道394 km+800 m处的韧性分量"

时间/min韧性分量数值
t0=0惯性分量R01.1×107
t1=90抵抗韧性R1583.504
t2=9000恢复韧性R20.033

图5

水峪沟国道394 km+800 m处韧性曲线和安全韧性"

表2

应急处理后水峪沟国道394 km+800 m处韧性分量"

时间/min韧性分量数值
t0=0惯性分量R01.1×107
t1=90抵抗韧性R1583.504
t2=4410恢复韧性R21.396

图6

采取应急处理后水峪沟国道394 km+800 m处韧性曲线"

图7

3种不同情况下水峪沟国道394 km+800 m处安全韧性"

图8

采取应急处理与灾中采取抵御措施韧性曲线对比"

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