加筋土坡地震稳定性的拟动力分析

Pseudo-dynamic Approach of Seismic Stability Analysis of Reinforced Soil Slope

研究加筋土坡在地震惯性力影响下的稳定问题。采用拟动力的方法表示作用在土坡滑动体上的水平与竖直地震惯性力。由于研究对象为加筋的土坡，所以引入水平条分法来研究加筋土坡的筋材拉力，并通过公式推导，设置算例研究土坡坡角、土体内摩擦角、地震加速度系数等因素对加筋效果的影响。结果表明：加筋拉力随地震加速度系数（kh ＝0．0、0．15、0．3）的增大而增大，随土坡坡角（60＆#176;～90＆#176;）增大而增大，随土体内摩擦角增大而减小。

The stability of reinforced soil slope subjected to seismic loads is analyzed in this paper .The horizontal and vertical seis-mic force are expressed by pseudo -dynamic approach .Because of the layering features of reinforced soil slope , reinforcement tensile force of the slope is studied through horizontal slice method ,and the formula is obtained .The analysis results for an example show that reinforcement tensile force increases with the increase of seismic acceleration coefficient ,the angle of the slope;while it decreases with the increase of soil friction angle .