Application of InSAR in Surface Deformation Monitoring of Electric Power Line Selection

• 作者: Qiang Liu Tianyong Chu Wuttichai Boonpook Yumin Tan
• 来源期刊: 电脑和通信(英文)
• 学科: 医学
• 关键词: Power Line Sentinel-1Adata Volume SCATTERING DECORRELATION LONG-TIME BASELINE
• 年，卷（期）: dnhtxyw_2019,（7）
• 页码范围: 39-52
• 页数: 14页
• 分类号: R73

摘要

In the process of site selection and the facility construction in power engineering, the geological conditions of the foundation have an important impact on the displacement of completed power facilities. Usually, the conventional surface displacement has certain continuity in time and space. Therefore, in the initial stage of power line selection, the relatively stable geological conditions can greatly reduce the probability of major accidents due to ground deformation. As a new surface displacement monitoring method, InSAR can obtain the displacement monitoring results in long time series. This paper used 20 Sentinel-1A data to study the geological conditions of power line selection. Based on the fact that the vegetation coverage in the line selection area and the poor penetration of C-band data may cause serious body scattering correlation, we verified the possibility of obtaining accurate results in a long-time baseline with less influence on volume scattering decorrelation. Using this method, we obtained the surface history displacement line chart of the 220 kV power line to be erected in Laiyuan to Quanyu, Hebei Province. By analyzing 10 high coherence points on the line, we found that the largest historical surface displacement in the 18 months is less than 30mm, and the maximum cumulative deformation rate is only 12 mm/a, which meets the requirements of power line erection.