摘要
为了彻底解决川藏公路藏东段冲洪积层河谷阶地滚石斜坡难以有效治理的问题,保障川藏公路安全畅通。文章采用野外调查、室内样品测试、受力与运动特征分析,以及FLAC和PFC数值模等方法,研究滚石的形成原因、失稳机理以及运动特征。研究表明:①在公路工程建设、河水冲刷等因素作用下形成不稳定的滚石斜坡;②破坏模式主要以颗粒滚落为主,局部破坏为辅;③受降雨融雪、固结强度、内摩擦角和振动等因素影响,斜坡局部及裸露的岩土颗粒处于极不稳定状态。
The problem of rolling rock slope in alluvial valley terrace of Eastern Tibet section of Sichuan-Tibet highway has not been effectively solved.In order to ensure the safety and smoothness of Sichuan-Tibetan high?way,the problem must be properly treated.In this paper,the formation causes,instability mechanism and motion characteristics of rolling stone slope were studied by using field investigation,indoor sample testing,stress and motion characteristics analysis,and FLAC and PFC numerical simulation methods.The results showed that the unstable rolling rock slopes have been formed under the influence of highway engineering construction and ero?sion caused by river water discharge,and the destruction mode was mainly caused by particle rolling supplement?ed by local destruction.Under the influence of rainfall,snow melting,consolidation strength,internal friction an?gle and vibration,the local slopes and exposed rock particles are extremely unstable.
作者
叶唐进
王泽文
刘依缘
李俊杰
李豪
YE Tang-jin;WANG Ze-wen;LIU Yi-yuan;LI Jun-jie;LI Hao(Faculty of Infrastructure Engineering,School of Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China;School of Engineering,Tibet University,Lhasa 850000,China)
出处
《高原科学研究》
CSCD
2019年第3期35-43,共9页
Plateau Science Research
基金
国家自然科学基金项目(41662020,51769033)
全国大学生创新实验项目(201710694013,201810694014)
关键词
滚石斜坡
失稳机理
运动特征
数值模拟
rolling-rock slope
instability mechanism
motion feature
numerical simulation
