摘要
在近水平甚至反倾地层中发生滑坡的可能性较低,但在我国三峡库区万州区近水平的侏罗系地层中发育有大量的具缓倾角滑面的滑坡,对其成因机理研究具有重要意义。基于弹塑性力学的相关理论和摩尔库伦强度准则,将近水平地层滑坡进行模型简化,对后缘陡倾裂隙中充水导致滑面滑动的问题进行定量化研究。运用弹性力学方法,探讨后缘裂隙中不同充水高度时滑面的破坏情况,分析滑面破坏的动态演化过程,并针对近水平地层滑坡提出一种稳定性计算的方法,对近水平地层滑坡成因机理认识以及该类滑坡防治设计具有参考价值。
The possibility of landslides in the near-horizontal and even anti-dip formations is relatively low,but many landslides with slow-inclined sliding surface are developed in the near-horizontal Jurassic stratum in the Wanzhou District of the Three Gorges Reservoir Area in China.Therefore,it is significant to study the formation mechanism of those landslides.Based on the elastic-plastic mechanics and Mohr-Coulomb strength criteria,this paper quantitatively studies on the issue that water filling in the steep slope of the trailing edge crack causes sliding by simplifying the near-horizon stratum landslide model.According to the method of elastic mechanics,the paper discusses the failure of sliding surface with different water filling heights in the trailing edge crack,analyzes the dynamic process of sliding surface failure,and puts forward a method to calculate the stability of near-horizontal stratum landslide,which is significant to understanding the formation mechanism of near-horizontal stratum landslides and the prevention design of such landslides.
作者
殷天赐
余乐
汪洋
周浩
姚鸣
霍志涛
YIN Tianci;YU Le;WANG Yang;ZHOU Hao;YAO Ming;HUO Zhitao(Faculty of Engineering China University of Geosciences(Wuhan),Wuhan 430074,China;Central South China Innovation Center for Geosciences,Wuhan 430205,China;Powerchina Hubei Electric Engeering Co.,Ltd.,Wuhan 430040,China;Institution of Geological Research,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《安全与环境工程》
CAS
北大核心
2020年第5期10-16,共7页
Safety and Environmental Engineering
基金
国家自然科学基金项目(41572289)
三峡工程后续工作项目(0001212018CC60003)。
关键词
近水平地层滑坡
裂隙水作用
破坏机理
near-horizontal stratum landslide
effect of fissure water
failure mechanism
