松动岩体边坡稳定性研究
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摘要
黄河大柳树坝址两岸山体中广泛分布着断层、软弱岩层和松动架空的岩体,且该区地震强度高。本文采用数值模拟的方法,对松动岩体高边坡在天然条件下和地震动作用下的稳定性进行了分析研究。结果表明:在天然条件下,坡体基本稳定,但表层坡体存在岩体卸荷松动现象,沿断层有集中剪切现象;地震动作用下,因岩体强度软硬相间而进一步发生松动,导致边坡失稳。
In both side of Daliushu dam site, so much rela xed rock mass can be fo und. The earthquake intensity is also very high in this area. In this paper, the relaxed rock mass slope stability,under both natural state and seismic state, has been analyzed by using numerical method. The result shows that under natural state, the slope is stable, but plenty of relief relaxed rock mass can be found in the surface of the slope, and stress focus on the fault. Under seismic state , the slope becomes unstable because the soft-hard lithologic group makes rock m ass become more relaxed then before.
引文
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