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金佛山水库取水口岩质高边坡动力稳定性分析

DOI: 10.3969/j.issn.1674-0696.2014.03.19, PP. 86-91

Keywords: 水利工程,岩质高边坡,动力稳定性,地震响应,破坏机制,hydraulicengineering,highrockyslope,dynamicstability,seismicresponse,failuremechanism

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Abstract:

:?针对重庆金佛山水库取水口岩质高边坡,采用人工修正的加速度时程作为地震输入条件,运用动力有限元法,分析了地震作用下边坡岩体动力时程响应规律及其变形破坏机制。结果表明:锚喷支护抗震效果显著,有效地约束了地震作用下的边坡变形;地震作用下岩体运动方向主要以水平方向为主,边坡应力分布主要为压应力,并未出现明显的拉应力集中区;边坡整体范围内地震加速度放大系数呈不规则分布,受地震累积效应影响,岩体质点速度响应滞后于地震波普变化;按地震烈度VII度进行工程抗震设防时边坡整体安全,虽然地震作用下边坡可能发生自上而下的压致拉裂式滑移破坏,但边坡整体大规模惯性滑移失稳可能性较小。

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