尺度相似变换中边坡工程行为变化的定性分析

本文应用相似理论和已有的岩土体边坡研究成果, 探讨了边坡在几何尺寸相似放大过程中所表现出的应力场、位移场及强度等工程特性的变化规律, 对运用已有边坡研究成果认识高边坡力学行为有重要的指导意义。

QUALITATIVE ANALYSIS OF CHANGE IN ENGINEERING BEHAVIOR OF SLOPE IN SIZE SIMILARITY TRANSFORMATION

ccording to the similarity theory and research experience on rock and soil slopes, the change regularities of stress field, displacement field, and medium strength of slope in the size similarity transformation are discussed in the paper. It is proved that with the slope size magnification in similarity scale Cl, the quantity of stresses will be amplified linearly in the same scale, but the shape of stress trace network will keep the same; the displacement will be amplified in a scale ofC 2l, the strength of slope medium will be decreased in a function of inverse proportion with Cl , and the failure surface will be inward shift. It also indicates that while both size and medium change simultaneously, the displacement, strength, and the shape of failure surface will also change in their special regularites. An example is given to prove the theoretical results above. The results will be helpful to research of engineering behavior of high slope.