高填黄土路基弹塑性变形分析

Elastic-plastic Deformation Analysis of the High-fill Embankment Loess

基于弹塑性模型计算结果,对高填黄土路基竖向和侧向变形问题进行了计算分析。揭示出边坡坡面1/2～1/3高度区域水平位移较大,最大水平位移发生在路基坡体内部,坡面的侧向位移在1/3坡高处出现极大值,路基坡面任一点竖向沉降与其高度近似成直线关系。随高度的增加而增加,路基最大竖向位移(沉降)出现于路表中部,但不均匀沉降在路肩附近区域最为突出。随着路基填筑高度的增加,路基最大竖向位移、最大侧向位移近似于线性增加。路基最大竖向位移、最大侧向位移不受路基宽度的影响。

Based on the results of elastic-plastic model of the highfill embankment, high-fill embankment on the Loess vertical and lateral deformation is calculated anaIysis. Revealed that the side slope 1/2 to 1/3 of a high degree of horizontal displacement be larger. The largest horizontal displacement occurred within in the embankment slope, the lateral displacement of the slope in 1/3 of slope height is a maximum value. Slope subgrade of the height and its vertical settlement is a linear approximation. With the high of the increase, the largest vertical displacement of subgrade （settlement） is in the middle road, but uneven settlement in the vicinity of shoulder is the most prominent. With the increase of high embankment construction, the subgrade largest vertical dis- placement and lateral displacement be similar to linear increase. Subgrade of the maximum vertical displacement and maximum lateral displacement will not affected roadbed width.