水利学报2018，Vol.49Issue(2)：223-231,9.DOI:10.13243/j.cnki.slxb.20170704
反倾层状岩质边坡倾倒破坏的离心模型试验研究
Study on the anti-dip layered rock slope toppling failure based on centrifuge model test
摘要
Abstract
In view of the insufficient recognition of the toppling failure mechanism of anti-dip layered rock slope,multiple of centrifugal model tests were carried out under different combinations of slope angles and anti-dip angles,in which flat glass was used as similar materials.Based on the image processing,the deformation and toppling failure mechanism of anti-dip layered rock slope under centrifuge loading condition were investigated,and the topping failure mode of anti-dip layered rock slope and the method of determining the location of failure surface were proposed.The results show that the deformation of the slope mainly occurs above the failure surface,the rocks located in the toe of slope prevent toppling failure.The displacement changed against time at the top of the slope is divided into two stages:the steady growth of the displacement and the accelerated growth of the displacement.The slope toppling failure process can be divid ed into four stages:(a)the toe rock of slope fracture;(b)the generated of slope top tension cracks;(c)rock fracture and progressive extension and (d)rock toppling failure instantly.Slope angle and rock anti-dip angle have a significant influence on the critical slope height and the position of failure surface when the slope is topping failure.The above research results can provide some references for the development of toppling failure theory,the evaluation of engineering geological disasters,and the prevention and mitigation of geo-disaster.关键词
层状边坡/倾倒破坏模式/变形破坏机理/离心模型试验Key words
layered rock slope/toppling failure modes/deformation and failure mechanism/centrifuge mod-el test分类
建筑与水利引用本文复制引用
吴昊,赵维,年廷凯,宋怀博,张彦君..反倾层状岩质边坡倾倒破坏的离心模型试验研究[J].水利学报,2018,49(2):223-231,9.基金项目
国家自然科学基金项目(51179022,51579032) （51179022,51579032）
中央高校基本科研业务费专项重点项目(DUT16ZD211,DUT17ZD205) （DUT16ZD211,DUT17ZD205）
