路堤下土体侧向变形性状研究

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.

Behavior of soil lateral deformation under embankments

Based on analysis of additional horizontal stress in the soil under embankment load,the behavior of the lateral deformation of the soil along the depth is studied.The result shows that the distribution of lateral deformation along the depth is arch-shaped,which corresponds nicely with the observed data.According to this,a new prediction model is established to forecast the lateral deformation.The shapes of the model curve with three parameters in the model a,b and c are presented.The three parameters can easily be determined by three measured data (s 0,0),(s 1,h 0) and (s 2,2h 0). This model is applied to study two cases.The comparisons illustrate that the displacement predicted by the model corresponds nicely with the measured data.