山区贴坡路堤工作性状模型试验研究

随着我国西部大开发建设的深入和公路建设的发展,贴坡高填方路堤已经成为西部高等级公路常见的路基形式.结合山区高速公路建设的实践,采用大型室内模型试验,对贴坡路堤工作性状进行了研究,重点介绍了该模型的试验设计、测试和试验数据分析方法.主要对试验过程中路堤内部应力、坡面位移进行了观测和分析,得出了在顶部静载作用下路堤的工作性状,试验结果表明：斜坡地基上填方路堤在填筑过程中,路堤内部应力与填筑高度呈正比,同一路堤填筑面上其应力大小不等;在加载过程中,路堤内部应力随加载面距离的增大而减小,同一路堤填筑面上其应力大小也不等;最大沉降位移出现在加载面位置,在其他位置沉降值较小;最大水平位移出现在坡肩处或滑面与坡面的交线处,在其他位置较小.

Model Experiment of Embankments Performance on Mountain Slope Foundation

According to practice experiences in the expressway construction on the mountain region,the full scale model experiment is carried to analyze the embankments performance on mountain slope foundation.This paper focuses on the test design and instrumentation of the embankments on mountain slope.According to practices experiences in the expressway construction on the mountain region,full scale model experiment was carried out.The vertical forces distribution,displacements of slope,the form and position of the slip curve surface in the embankments were also investigated.The tests results show that the vertical forces in the embankments are increased with the height of the embankments during the construction.And the vertical forces in the embankments are decreased with the distance increase from the embankments crest.And it is very useful for the expressway design and construction in the mountain region.