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在对云南省盈江县新开挖的公路边坡进行全面调查的基础上,在腾冲-陇川公路盈江境内芒线电站东采取花岗闪长岩风化形成的土体为样品,进行土工测试得到岩土体力学参数,选取盈江县昔马公路三家寨西南开挖形成的多级边坡为典型边坡进行测绘作为边坡模型,利用大型岩土工程软件FLAC3D建模、计算并分析边坡在自然状态下和地震作用下的稳定性。结果表明:在自然状态下,边坡安全系数为1.21,稳定性较好;在峰值加速度为0.046g的地震作用下,部分边坡位移较大,边坡局部失稳,将发生小滑坡、崩塌;在峰值加速度为0.134g的地震作用下,边坡将发生整体失稳,部分岩、土体被抛射,即产生大范围的滑坡、崩塌等较严重的地质灾害。
Based on a comprehensive survey of the newly excavated highway slopes in Yingjiang County, Yunnan Province, the soil formed by the weathering of granodiorite was taken as the sample in the east of the Mm Line Power Station in Yingjiang, Tengchong-Longchuan Highway. The mechanical parameters of rock and soil were obtained by testing. The multi-grade slope formed by southwest excavation of Sanjiazhai, Xima Highway in Yingjiang County was selected as the typical slope for the slope model and was modeled and analyzed with the FLAC3D large-scale geotechnical software Stability of slopes under natural conditions and earthquakes. The results show that under natural conditions, the safety factor of slope is 1.21, and the stability is good. Under the action of the earthquake with the peak acceleration of 0.046g, the displacement of some of the slopes is large and the slope is locally unstable, and small landslide and collapse will occur Under the action of an earthquake with a peak acceleration of 0.134g, the entire slope of the slope will be instable. Some of the rock and soil mass will be ejected, resulting in serious geological disasters such as landslide and collapse.