有限元强度折减法识别滑动带的例证

以广东省西部沿海高速公路某处于挤压变形阶段的滑坡为研究对象,通过有限元强度折减法对其进行稳定性分析,判别其塑性变形区,再用物探的面波等速度彩色剖面图合成技术来实现瞬态面波勘察技术对滑动带的搜索,对比及验证有限元数值分析对滑动带的判别结果,实践证明二者所显示的滑动面数量和位置基本一致,印证了有限元强度折减法在滑坡稳定性分析中对潜在滑动面搜索的有效性及可靠性.

Case Study of Identifying Sliding Zone by FEM Strength Reduction

This paper chooses a landslide,which is at the extrusion deformation stage on Western Coast expressway,as a case study subject; then analyzes its stability by FEM strength reduction method,which includes distinguishing its plastic deformation zone,using surface wave uniform velocity colorful profile synthesis method to realize sliding zone search based on transient surface wave exploration technology.The analysis results of the two methods were compared,and the quantity and location of sliding surface by FEM were consistent well with transient surface wave technology.The paper proves that FEM strength reduction is effective and reliable to search for potential sliding surfaces in sliding stability analysis.