舟曲断裂带滑坡灾害效应与防治对策研究

郭富赟; 周小龙; 火飞飙; 张毅

doi:10.16031/j.cnki.issn.1003-8035.202202038

舟曲断裂带滑坡灾害效应与防治对策研究

郭富赟^{1, 2,},
周小龙^{1, 2},
火飞飙^{2, 3},
张毅^{2, 4}

1.
甘肃省地质环境监测院，甘肃兰州　730050
2.
甘肃省环境地质与灾害防治技术创新中心，甘肃兰州　730000
3.
兰州大学资源环境学院，甘肃兰州　730000
4.
兰州大学地质科学与矿产资源学院，甘肃兰州　730000

基金项目: 国家重点研发计划课题（2017YFC1501005）；甘肃省科技重大专项（19ZD2FA002）

详细信息

作者简介:
郭富赟（1970-），男，甘肃景泰人，正高级工程师，主要从事地质灾害防灾减灾方面的研究工作。E-mail：fyg51913@163.com

中图分类号: P642.22
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出版历程
- 收稿日期: 2022-02-22
- 修回日期: 2022-04-12
- 网络出版日期: 2022-10-20
- 刊出日期: 2022-12-21

Study on the disaster effect and prevention countermeasures of landslide in Zhouqu fault zone

Fuyun GUO^{1, 2,},
Xiaolong ZHOU^{1, 2},
Feibiao HUO^{2, 3},
Yi ZHANG^{2, 4}

1.
Institute of Geo-environmental Monitoring of Gansu Province, Lanzhou, Gansu　730050, China
2.
Gansu Technology Innovation Centre for Environmental Geology and Geohazard Prevention, Lanzhou, Gansu　730000, China
3.
College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu　730000, China
4.
School of Earth Sciences, Lanzhou University, Lanzhou, Gansu　730000, China

摘要

摘要: 舟曲是我国滑坡灾害最严重的地区之一，其中断裂带滑坡活动频繁，危害巨大。文章在综合遥感、变形监测和现场调查的基础上，研究了断裂带滑坡特征及其灾害效应，提出了风险防控对策。研究表明：（1）断裂带滑坡形态上主要为长条形和簸箕形；滑体、滑床一般为板岩、千枚岩碎块石组成，滑带土为含砾黏土；滑坡具有多级、分块活动特征且块体差异性滑动特征显著；滑坡一般为慢速滑动，具有蠕滑特征；滑坡具有降雨敏感性特征，深层滑坡对降雨响应有明显的滞后性。（2）断裂带滑坡的成灾模式主要为慢速滑动过程中的蠕滑拉裂效应和冲击推挤效应，滑动后的堵江淹没效应、挤压侵蚀效应，以及社会影响效应等。（3）断裂带滑坡规模较大，地层破碎，治理条件差，工程治理措施难以奏效。但其突发性不强，应以管防为主，宜采取用地管控、监测预警、避险搬迁等防治措施，慎用工程治理措施。
- 断裂带 /
- 滑坡 /
- 特征 /
- 灾害效应 /
- 对策
Abstract: Zhouqu is one of the areas with the most serious landslide disasters in China, in which the fault zone landslide are frequent and the harm is huge. Based on the comprehensive remote sensing, deformation monitoring and field investigation, this paper studies the reactivation characteristics and disaster-causing mode of fault zone landslide, and puts forward the prevention and control countermeasures. The results show that: (1) the landslide in the fault zone is mainly in a strip shape and dustpan shape; The sliding body and sliding bed are generally composed of slate, phyllite and rubble, and the sliding zone soil is pebbly clay; The landslide has the characteristics of multi-level and block activity, and the differential sliding characteristics of different blocks are significant; Landslide is generally slow sliding and has fluidity characteristics; Landslide has the characteristics of rainfall sensitivity, and the response of deep landslide to rainfall has obvious lag. (2) the disaster modes of landslides in fault zone are mainly creep, tension crack effect and impact push effect in the process of slow sliding, river blocking and flooding effect, extrusion erosion effect and social impact effect after sliding. (3) the landslide conditions are large and the treatment measures are difficult to get together. However, its sudden nature is not strong, so it should focus on management and prevention. The recommended prevention measures are land use control, monitoring and early warning, risk avoidance and relocation, and engineering treatment measures are not recommended.
- fault zone /
- landslide /
- features /
- disaster effect /
- countermeasures

HTML全文

图 1 舟曲断裂带滑坡分布图

Figure 1. Distribution of landslides in Zhouqu fault zone

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图 2 滑坡形态图

Figure 2. Morphology of landslide

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图 3 滑坡规模正态分布图

Figure 3. Normal distribution of landslide scale

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图 4 舟曲立节北山滑坡分块平面图

Figure 4. Block plan of Lijie Beishan landslide in Zhouqu

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图 5 江顶崖滑坡剖面图

Figure 5. Profile of Jiangdingya landslide

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图 6 牙豁口滑坡滑动速率曲线图

Figure 6. Sliding rate of Yahuokou landslide

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图 7 大小湾滑坡活动分区

Figure 7. Landslide activity zoning in Daxiaowan

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图 8 锁儿头滑坡分块InSAR监测变形速率分布图

Figure 8. Distribution of deformation rate of Suoertou landslide monitored by InSAR

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图 9 锁儿头InSAR监测变形与降水关系图

Figure 9. Relationship between deformation and precipitation monitored by lock head InSAR

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图 10 牙豁口滑坡InSAR监测变形与降水关系图

Figure 10. Relationship between deformation and precipitation monitored by Yahuokou landslide InSAR

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图 11 舟曲龙江村滑坡体上建筑物密集

Figure 11. Dense buildings on the landslide mass in Longjiang Village, Zhouqu

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图 12 锁儿头滑坡前缘建筑密集

Figure 12. Dense buildings at the front edge of Suoertou landslide

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图 13 江顶崖滑坡堵江灾害效应图

Figure 13. Effect of Jiangdingya landslide blocking the river

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