基于遥感技术的嘉黎江巴变形体稳定性评价与分析

张占忠; 陈富强; 刘亚林; 李丹; 杜世回; 张晓宇

doi:10.19509/j.cnki.dzkq.2022.0246

基于遥感技术的嘉黎江巴变形体稳定性评价与分析

doi: 10.19509/j.cnki.dzkq.2022.0246

中铁第一勘察设计院集团有限公司, 西安 710043

基金项目:

中铁第一勘察设计院集团有限公司重点专项研发项目“铁路智能勘测及数据管理关键技术研究” 2021KY73ZD(ZDZX)-1

详细信息

作者简介:
张占忠(1977—)，男，高级工程师，主要从事遥感技术应用研究等方面的工作。E-mail: cfq12344321@126.com

中图分类号: P642.22
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- 文章访问数: 613
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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-29

Stability evaluation and analysis of the Jiangba deformed body in Jiali County based on remote sensing technology

China Railway First Survey and Design Institute Group Co. Ltd., Xi′an 710043, China

摘要

摘要:
江巴变形体位于西藏嘉黎县尼屋乡江巴村下游约5 km处的易贡藏布右岸, 遥感影像中可见多处地表崩滑痕迹, 存在山体不稳定、发生崩滑堵江的威胁。为了查明该坡体的稳定性、整体变形特征以及可能存在的灾害威胁, 达到提前预防、未雨绸缪的目的，采用“多期次影像遥感解译监测+InSAR形变分析+现场调查”的综合研究评价方法, 对该变形体坡面进行了详细的解译分析, 显示变形体目前处于“整体稳定、局部崩滑”状态。近年来变形体范围边界未发生明显变化, 在其南侧及东侧坡脚区域发生过多期次小规模崩滑现象, 在外部环境变化影响下, 变形体中上部仍然存在高位崩塌-碎屑流的可能。
- 西藏易贡藏布 /
- 江巴变形体 /
- 遥感监测 /
- 综合解译 /
- InSAR
Abstract:
The Jiangba deformed body is located approximately 5 km downstream of Jiangba village, Niwu Township, Jiali County, Tibet, on the right bank of Yigong Zangbo. Multiple surface avalanche traces are visible in the remote sensing images, and there is a threat of landslides and river blockage due to the instability of the mountain. There is an urgent need to identify the stability of the slope, the overall deformation characteristics and possible disaster threats to achieve the purpose of early prevention and plan ahead. In this study, a comprehensive research and evaluation method of "multistage image remote sensing interpretation monitoring +InSAR deformation analysis + field investigation" was adopted to interpret and analyze the slope surface of the deformed body in detail, and it is shown that the deformed body is currently in a state of "overall stability and local collapse". In recent years, the boundary of the deformed body has not changed significantly, and many small-scale landslides have occurred in the southern and eastern slope foothills. Under the influence of external environmental changes, the possibility of high collapse-debris flow still exists in the middle and upper parts of the deformed body.
- Yigong Zangbo /
- Jiangba deformed body /
- remote sensing monitoring /
- comprehensive interpretation /
- InSAR

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图 1 江巴变形体位置示意图

Figure 1. Schematic diagram of the location of the Jiangba deformed body

下载: 全尺寸图片幻灯片

图 2 研究区地质构造分布图

AnOl.前奥陶纪雷龙库岩组石英岩; C₂P₁l.石炭纪-二叠纪来姑组石英砂岩; Kηγ.晚燕山期二长花岗岩; Eηγ.喜山期二长花岗岩; Q₃^gl.晚更新世冰积物; Q₄^al.全新世冲积物; Q₄^pl.全新世洪积物；下同

Figure 2. Distribution of geological formations in the study area

下载: 全尺寸图片幻灯片

图 3 巴变形体地质遥感解译图(a, b)及照片(c)

Q_3-4^pl.上更新统-全新统洪积物; F₂/f2.断裂构造及次级构造编号

Figure 3. Geological remote sensing interpretation map (a, b) and photos (c) of the Jiangba deformed body

下载: 全尺寸图片幻灯片

图 4 江巴变形体遥感动态监测影像

Figure 4. Remote sensing dynamic monitoring image of the Jiangba deformed body

下载: 全尺寸图片幻灯片

图 5 江巴变形体局部形变对比图

Figure 5. Comparison of the local deformation of the Jiangba deformed body

下载: 全尺寸图片幻灯片

图 6 江巴变形体InSAR监测形变速率及分区图(2016.10-2020.11)

Figure 6. InSAR monitoring deformation rate and zoning map of the Jiangba deformed body

下载: 全尺寸图片幻灯片

图 7 江巴变形体现场调查照片

Figure 7. Photos of the Jiangba deformed body site investigation

下载: 全尺寸图片幻灯片

表 1 江巴变形体遥感动态监测影像数据一览

Table 1. List of remote sensing dynamic monitoring image data of the Jiangba deformed body

序号	1	2	3	4	5	6
数据时相	1988.10	1994.04	2000.09	2006.05	2015.11	2020.10
影像类型	TM5	TM5	ETM7	Quickbird	GF-2	GF-2
分辨率/m	30	30	15	0.6	0.8	0.8

下载: 导出CSV

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