地震断层破裂与公路路堤力学作用研究

Study on Seismic Fault Fracture and Mechanical Action of Highway Embankment

文章主要研究正断层破裂对单层地基上公路路堤的影响。采用有限元软件Flac-2D进行了准静态参数化数值分析,旨在研究路堤对断层破裂路径的影响、路堤的变形以及由于破裂传播而改变其初始压实度。数值分析结果表明:路堤的存在对地表变形有显著影响;同时还观察到,正断层破裂在被检查路堤中的扩展,也会导致路堤外表面的显著变形和相对压实度的显著下降。

The influence of normal fault rupture on highway embankment on the single-layer foundation is studied. Quasi-static parametric numerical analysis is carried out by using finite element software Flac-2 D. The purpose of this paper is to study the influence of the embankment on fault rupture path,as well as the deformation of embankment and the change of initial compaction due to the propagation of rupture. The results of the numerical analysis show that the existence of embankment has a significant effect on surface deformation. In addition,it is also observed that the expansion of normal fault rupture in the inspected embankment results in significant deformation of the outer surface of the embankment and a significant decrease in relative compaction.