不同临空条件的层状反倾岩质边坡倾倒变形几何特征参数影响规律  

Action law of geometrical characteristic parameters in the anti-dip rock slopes under different free face condition

作　　者：黄少平 晏鄂川[1] 尹晓萌 陈前 李兴明[1] Huang Shaoping;Yan Echuan;Yin Xiaomeng;Chen Qian;Li Xingming(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;College of Urban Construction,Wuchang University of Technology,Wuhan 430223,China;Faculty of Architecture and Civil Engineering,Xinyang Normal University,Xinyang Henan 464000,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]武昌理工学院城市建设学院,武汉430223 [3]信阳师范学院工程学院,河南信阳464000

出　　处：《地质科技通报》2021年第1期159-165,共7页Bulletin of Geological Science and Technology

基　　金：国家重点基础研究发展计划(“973”计划)项目(2011CB710600);国家自然科学基金项目(2019053086)。

摘　　要：层状反倾岩质边坡是一种常见边坡类型,其变形破坏模式多样、力学机制复杂、影响因素众多。为揭示层状反倾岩质边坡不同临空条件几何特征参数对反倾边坡倾倒变形影响规律,通过3DEC并结合数理统计系统深入研究几何特征参数对倾倒变形影响。研究表明:①反倾边坡具有3个临空面时边坡变形最大,1个临空面时边坡变形最小;②变形随边坡高度、切坡角度增大而增大,随节理面与临空面夹角的增大而减小,随岩层厚度增大先增大后减小;③2个临空面夹角90°时边坡变形最大;④1个、2个临空面时节理倾角60°时位移最大,3个临空面时随节理倾角增大而增大。The anti-dumping layered rock slope is a common type of slope,which has various deformation and failure modes,complicated mechanics mechanism and many influencing factors.In order to reveal the influence law of the geometric characteristic parameters in different fronting surface conditions on the flexural toppling deformation of the reversed inclined layered rock slope,this study used 3DEC to research the influence law of geometric characteristic parameters on flexural toppling deformation,combined with mathematical statistics system.The obtained results show that:①The maximum deformation displacement is found on three faces of the slope and the minimum on one face;②The deformation displacement of slope increases with slope height,slope angle and joint inclination,and it decreases with the increase of the included angle between the joint surface and the free face;③The deformation displacement of the slope is the largest when the angle between the two free faces is 90°;④The deformation displacement is the largest when joint inclination angle is 60°on the one and two free faces,and it increases with the joint inclination angle increasing.

关 键 词：反倾层状岩质边坡 3DEC 临空面 几何特征参数 

分 类 号：P642[天文地球—工程地质学]