基于SBAS-InSAR技术的中老铁路沿线地表形变空间分布研究——以景洪段为例
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靳婷婷(1999-),女,硕士,主要研究方向为雷达干涉测量。Email: 2323130106@ynnu.edu.cn。 |
Copy editor: 张仙
收稿日期: 2024-05-27
修回日期: 2024-08-26
网络出版日期: 2026-06-03
基金资助
云南省重大科技专项“面向云南自然资源生态环境监测及技术治理的关键技术研究”(202202AD080010)
云南师范大学研究生科研创新基金(YJSJJ25-B148)
Exploring the spatial distribution of surface deformations along the China-Laos railway based on SBAS-InSAR technology: Taking the Jinghong section as an example
Received date: 2024-05-27
Revised date: 2024-08-26
Online published: 2026-06-03
关键词: SBAS-InSAR; 地表形变; 中老铁路; 空间分布
靳婷婷 , 喜文飞 , 钱堂慧 , 郭峻杞 , 洪文玉 , 丁子天 , 桂富羽 . 基于SBAS-InSAR技术的中老铁路沿线地表形变空间分布研究——以景洪段为例[J]. 自然资源遥感, 2025 , 37(4) : 232 -240 . DOI: 10.6046/zrzyyg.2024186
Surface deformations pose significant threats to the normal operation of railways. Investigating the spatial distribution of surface deformations along the China-Laos railway holds great significance for disaster prevention and mitigation. Based on 36 scenes of ascending orbit and 50 scenes of descending orbit images from Sentinel-1A satellite from December 2021 to August 2023, this study conducted deformation inversion using the small baseline subset interferometric synthetic aperture Radar (SBAS-InSAR) technique. Besides, this study conducted spatial distribution statistics and analysis of surface deformations along the Jinghong section of the China-Laos railway. The results indicate that the overall deformation along the railway exhibits a heterogeneous distribution, with multiple potential hazards in the northern mountainous area. Among the selected typical deformation zones, the maximum subsidence rate in the northern mountainous area reaches -108.718 mm/a, whereas the southern plain area shows significant uplift with a rate of 227.315 mm/a. Along the railway, the surface deformation rates in the line of sight (LOS) direction ranged from -319.811 mm/a to 321.638 mm/a. Obvious subsidence occurred in Puwen Town and Dadugang Township. Conversely, minor subsidence was observed in urban areas like Mengyang town, Yunjinghong subdistrict, and Gasa town, with pronounced uplifts in the southeastern part of Menghan town. Along the railway, deformations in mountainous areas were primarily concentrated at elevations ranging from 800 m to 1400 m, with soft rocks prevailing in these deformed areas. InSAR-based analysis of the spatial distribution of the surface deformations along the railway is of significant value for the safe operation of the railway.
表1 形变区统计Tab.1 Statistics of the deformation areas |
| 因子 | 分级 | 形变区数量/个 | 占比/% |
|---|---|---|---|
| 海拔 | [400,600) m | 2 | 5.4 |
| [600,800) m | 5 | 13.5 | |
| [800,1 000) m | 12 | 32.4 | |
| [1 000,1 200) m | 7 | 18.9 | |
| [1 200,1 400) m | 10 | 27.0 | |
| ≥1 400 m | 1 | 2.7 | |
| 距水系距离 | <1 000 m | 6 | 16.2 |
| ≥1 000 m | 31 | 83.8 | |
| 距断层距离 | <1 000 m | 5 | 13.5 |
| ≥1 000 m | 32 | 86.5 | |
| 工程地质 岩组 | 坚硬岩类 | 3 | 5.4 |
| 较硬岩类 | 2 | 8.1 | |
| 软岩类 | 30 | 81.1 | |
| 极软岩类 | 2 | 5.4 |
表2 典型区形变特征Tab.2 Description of deformation characteristics |
| 形变区 | 位置 | 地理环境 | 形变特点 |
|---|---|---|---|
| X7 | 勐养镇 | 海拔1 250 m以上,岩体为硅质碎屑岩沉积岩 | 整体呈现沉降趋势 |
| B1 | 勐罕镇 | 海拔800 m以下,属于软岩类岩体,土质疏松 | 整体以抬升为主 |
| X25 | 嘎洒镇 | 左侧存在耕地与绿植区,右侧多为不透水面,下部主要为软岩 | 整体形变程度较小,呈现上下波动状态 |
| X30 | 勐罕镇 | 属于构造剥蚀中山地貌,节理裂隙发育,岩石破碎,发育多组纵向节理 | 整体以沉降为主,2023年4—5月形变急剧 |
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