摘要
针对岩质反倾边坡滑动倾倒复合破坏的研究不足,首先建立了边坡滑动-块状倾倒-弯曲倾倒复合破坏的地质模型,具体可分为滑动区、块状倾倒区和弯曲倾倒区;然后根据三个分区岩块的破坏机制,提出了各个分区的力学模型;并基于极限平衡理论和悬臂梁模型,提出了边坡滑动-块状倾倒-弯曲倾倒复合破坏的逐步分析方法;最后通过一个工程实例验证了所提地质模型和分析方法的正确性.研究结果表明:岩质反倾边坡滑动-块状倾倒-弯曲倾倒复合破坏的稳定性由滑动-块状倾倒复合破坏区域控制;块状倾倒区域属于主动破坏区域,滑动区属于被动破坏区域,治理加固时应重点加固块状倾倒破坏区.
Aiming at the insufficient research on the complex sliding-toppling failure of anti-dip rock slopes,the geological model of complex sliding-block-flexural toppling failure was constructed,firstly,which contains the sliding,block toppling and flexural toppling zones.Next,based on the failure mechanisms of these three zones,their mechanical models were established,respectively.Then,the stability analysis approach of the complex sliding-block-flexural toppling failure was proposed according to the limit equilibrium theory and the cantilever beam model.Finally,one case study was performed for practical verification on the proposed geomechanics models and analysis approach.The results show that the stability of the complex sliding-block-flexural toppling zones is controlled by the block-flexural toppling zones.Further,the block and flexural toppling zones are active and passive failure zones,respectively.Consequently,the block toppling zone plays a vital role in slope design treatment.
作者
孙朝燚
陈从新
郑允
张伟
马力
张海娜
张亚鹏
SUN Chaoyi;CHEN Congxin;ZHENG Yun;ZHANG Wei;MA Li;ZHANG Haina;ZHANG Yapeng(State Key Laboratory of Geomechanics and Geotechnical Engineering,Instituteof Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《湖南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2020年第1期130-138,共9页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(11472293)
国家自然科学基金青年基金资助项目(11602284,41807280)~~
关键词
岩质反倾边坡
横向节理
边坡稳定性
数值模拟
分析方法
anti-dip rock slopes
transverse joints
slope stability
numerical simulation
analysis approach