Settlement and Landslide Risk Analysis of Temporary Soil Dump Based on InSAR and Continuous Medium Model

作者：X. P. Qin, Yuanjun Huang, Linfu Xie, Xuguo Shi, Chisheng Wang · 年份：2024 · DOI：10.5194/egusphere-egu24-2957 · 研究领域：Landslides and related hazards

The planned soil dumping in Shenzhen has been insufficient for a long time, and improper disposal of excess soil would pose significant safety hazards such as soil settlement and landslides. Therefore, analyzing the causes and potential impacts of soil dumping disasters is crucial for effective risk prevention and control. Interferometry Synthetic Aperture Radar (InSAR) is an effective land surface deformation monitoring technology with unique advantages, including low costs, large-scale implementation potential, and a high coherence level in the settlement analysis of soil dumps without vegetation.This study investigated a soil dump with the highest risk potential in the Shenzhen-Shanwei Special Cooperation Zone, processing 91 Sentinel-1 images from 2019 to 2022 for deformation monitoring. An improved Small Baseline Subset-InSAR (SBAS-InSAR) method was utilized to analyze the soil dump’s time-series deformation, and multi-source remote sensing data were used for auxiliary interpretation. The experimental results indicate that rainfall, high temperature, and construction vibrations may cause instability of the soil dump. When the monthly rainfall is 200 mm/month and the temperature is 30℃, the meteorological conditions significantly impact the soil dump’s stability. In addition, vegetation and drainage procedures can help resist the impact of high temperatures and rainfall. Activities such as slope excavation, earthwork filling, and gravel produc...