基于边坡雷达技术的降雨条件下不同岩型边坡的变形规律研究

Study on deformation law of slopes with different lithology under rainfall conditions based on slope radar technology

为分析外荷载作用对不同岩型边坡稳定性的影响,采用合成孔径边坡雷达监测技术,对四川省攀枝花市某铁矿东山头区域进行在线监测,研究降雨条件下不同岩型(砂岩型和辉长岩型)边坡变形规律,对滑动变形和沉降变形结果进行分析。研究结果表明:砂岩型边坡受到雨水冲刷影响后,滑动变形呈现波动上升趋势,而辉长岩型边坡受降雨冲刷影响较小;砂岩型边坡在降雨条件下更容易发生滑动变形,且变形量相较辉长岩型边坡更大;2种岩型边坡在沉降变形方面相差较小。研究结果可为降雨条件下的边坡稳定性研究及岩石边坡安全监测提供一定参考。

In order to analyze the influence of external load on the stability of slopes with different lithology,the synthetic aperture radar slope monitoring technology was used to conduct online monitoring of the eastern hill area of a mine in panzhihua-xichang region of Sichuan.The deformation law of slopes with different lithology(sandstone type and gabbro type)under rainfall conditions was studied,and the sliding deformation and settlement deformation were analyzed.The results show that the sliding deformation of sandstone slope presents a fluctuating upward trend after being affected by rain erosion,while the gabbro slope is less affected by rain erosion.There are differences in the deformation of slopes with different lithology under rainfall conditions.The sandstone slope is more prone to occur the sliding deformation under rainfall conditions,and the deformation is larger than that of gabbro slope.There is little difference in the settlement deformation between the slopes with two kinds of lithology.The research results can provide some reference for the slope stability research and safety monitoring of rock slope.