高速岩质滑坡碰撞碎裂机理物理实验研究

发布时间：2018-01-24 10:29

本文关键词： 高速岩质滑坡碰撞破碎机理力学参数滑距　出处：《工程地质学报》2017年06期 　论文类型：期刊论文

【摘要】：大型高速岩质滑坡的碰撞碎裂解体对其运动特性有显著控制效应,进而影响堆积体的地质结构和稳定性。本文以唐家山高速滑坡为研究对象,基于地质分析原理,解译了滑体碰撞碎裂过程和特征。通过岩石坠落碰撞试验,量化了碎屑物粒径,岩块质量损失与碰撞速度的关系,得出碰撞速度增加会使碰撞块体质量损失增大,碎裂物粒径更小,从而降低滑体摩擦系数。开展碰撞前后岩块的岩石常规力学实验,发现碰撞后岩石的力学参数指标会降低。最后借助岩石滑槽碰撞模型试验,获取岩块撞击方式和撞击速度等对滑距和堆积形态的控制效应。研究可为高速岩石滑坡成灾范围的预测提供借鉴。
[Abstract]:The impact fragmentation and disintegration of large high speed rock landslide have a significant control effect on its movement characteristics, and then affect the geological structure and stability of the accumulation body. This paper takes Tangjiashan high speed landslide as the research object. Based on the principle of geological analysis, this paper interprets the process and characteristics of collision fragmentation of sliding body, and quantifies the relationship between particle size of debris, mass loss of rock mass and impact velocity through rock falling impact test. It is concluded that the increase of collision velocity will increase the mass loss of the impact block and decrease the friction coefficient of the sliding body. The conventional mechanical experiments of rock blocks before and after the collision will be carried out. It is found that the mechanical parameters of rock will be reduced after collision. Finally, the impact model test of rock chute is carried out. The controlling effects of rock impact mode and impact velocity on slip distance and accumulation morphology are obtained. The study can be used for reference in predicting the disaster range of high speed rock landslides.
【作者单位】：西南交通大学地球科学与环境工程学院;高速铁路运营安全空间信息技术国家地方联合工程实验室;四川省交通运输厅公路规划勘察设计研究院;凉山州地质环境监测站;
【基金】：国家自然科学基金青年基金项目(41402266) 中央高校基本科研业务费创新项目(2682015CX011) 中国国家留学基金委留学基金(访问学者) 四川交通建设科技项目(2015A1-3)资助
【分类号】：P642.22
【正文快照】： 0引言20世纪90年代以来,全球极端气候(降雨、台风)和地震频繁发生,在世界各地发生了很多大型高速岩质滑坡,且呈现逐年上升趋势(黄润秋等,2008a,2008b)。如台湾集集地震中的草岭潭滑坡(Yang et al.,2014)、西藏易贡藏布扎木弄巴特滑坡(Xu et al.,2012)、四川安县大光包滑坡(黄

【相似文献】