袁东, 张广泽, 王栋, 毛邦燕, 游勇, 柳金峰. 西部山区交通廊道泥石流发育特征及选线对策[J]. 地质通报, 2023, 42(5): 743-752. DOI: 10.12097/j.issn.1671-2552.2023.05.007
    引用本文: 袁东, 张广泽, 王栋, 毛邦燕, 游勇, 柳金峰. 西部山区交通廊道泥石流发育特征及选线对策[J]. 地质通报, 2023, 42(5): 743-752. DOI: 10.12097/j.issn.1671-2552.2023.05.007
    YUAN Dong, ZHANG Guangze, WANG Dong, MAO Bangyan, YOU Yong, LIU Jinfeng. Analysis on development characteristics of debris flow and route selection countermeasures along the traffic lines in mountain areas of Western China[J]. Geological Bulletin of China, 2023, 42(5): 743-752. DOI: 10.12097/j.issn.1671-2552.2023.05.007
    Citation: YUAN Dong, ZHANG Guangze, WANG Dong, MAO Bangyan, YOU Yong, LIU Jinfeng. Analysis on development characteristics of debris flow and route selection countermeasures along the traffic lines in mountain areas of Western China[J]. Geological Bulletin of China, 2023, 42(5): 743-752. DOI: 10.12097/j.issn.1671-2552.2023.05.007

    西部山区交通廊道泥石流发育特征及选线对策

    Analysis on development characteristics of debris flow and route selection countermeasures along the traffic lines in mountain areas of Western China

    • 摘要: 青藏高原东部受地形地貌和地质构造影响,区域泥石流密度大,类型多样,暴发频繁。为研究交通廊道内泥石流发育特征及其对工程的影响,通过高分遥感解译、现场调查、室内颗分实验等手段,对研究区泥石流的类型和分布规律进行了系统研究,并提出相应的选线对策。结果表明:①研究区主要发育暴雨型泥石流和冰川型泥石流,具有泥石流分布广、种类多、规模大、灾害链长等特点,临近线路多为暴雨型泥石流;②研究区存在潜在泥石流沟勘察判识困难、灾害链防治设计难度大、高原施工环境恶劣等问题。③交通廊道选线应贯彻风险控制原则,采取减灾选线为主导,对物源估算难、潜在泥石流沟识别不清楚等地区应积极采用InSAR、LiDAR和无人机技术进行勘察,对复杂地质条件的泥石流沟应采用“空天地”一体化综合勘察技术,针对不同类型泥石流结合其特征采取不同的防治对策。

       

      Abstract: Affected by topography and tectonics, the eastern part of the Qinghai-Tibet Plateau is characterized by high density, diverse types and frequent outbreaks of debris flows.In order to provide support for the planning, selection, and later operation of the line engineering, we study the development characteristics of debris flows in the transportation corridor and their impact on the project.In this paper, through high resolution remote sensing interpretation, field surveys, and grain analysis tests, the types and distribution of debris flow in the study area have been systematically studied, and corresponding route selection strategies have been proposed.The results show that: ①Rainstorm debris flows and glacier debris flows are mainly developed in the study area, which has the characteristics of wide distribution, multiple types, large scale, and long disastrous chain.The adjacent lines are mostly rainstorm debris flows.②The study area has problems such as difficulty in investigating and identifying potential debris flow ditches, difficult design of disaster chain prevention and control, and harsh plateau construction environment.③The Sichuan-Tibet railway line selection should implement the risk control principle, take disaster mitigation line selection as the leading factor, and actively use InSAR, LiDAR, and UAV technology to conduct surveys on complex sources such as difficult source estimation and unclear identification of potential debris flow gully.The geological conditions of debris flow gully investigation should adopt the "air, space and earth" integrated comprehensive survey technology, and different types of debris flow should be combined with the characteristics of the debris flow to take diverse prevention and control measures.

       

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