分析了路堤荷载作用下土中水平向附加应力随深度的变化特征,得出了侧向变形沿深度弓形分布的变化规律,大量实测结果也证明了这一点.在此基础上提出了符合该变形规律的预测模型,分析了模型曲线随其中3个参数a,b和c的变化规律,并且通过3个实测点的侧向变形数据(s0,0), (s1,h0 )和(s2,2h0 )就可以简单地定出模型中这3个参数.将该模型应用到2个工程实例当中,预测结果和实测数据比较吻合,取得了较好的效果. This paper analyzes the variation characteristics of horizontal additional stress along the depth of embankment under the action of embankment load and obtains the variation rule of the lateral distribution of the bowing depth along the depth.The results also prove this point.On the basis of this, The regular prediction model is used to analyze the variation of the model curve with three parameters a, b and c, and through the lateral deformation data (s0,0), (s1, h0) and (s2,2h0 ), The three parameters in the model can be easily determined, and the model is applied to two engineering examples. The predicted result is in good agreement with the measured data and good results are obtained.