【作者】 陈洪凯； 唐红梅； 叶四桥； 易朋莹； 胡明；

【Author】 CHEN Hong-kai;TANG Hong-mei;YE Si-qiao;YI Peng-ying;HU Ming Inst.of Geotechnical Engineering,Chongqing Jiaotong University,Chongqing 400074 China Key Lab.For the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering,Ministry of Education,Chongqing University,Chongqing 400044 China

【机构】 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室； 重庆交通学院岩土工程研究所；

【摘要】 危岩是三峡库区主要的地质灾害之一,具有数量多、分布面广、稳定性差、致灾危险性大的特点。软硬相间的地层组合、陡峻的地形及强烈的卸荷作用是形成危岩的内因,而裂隙水压力及地震是形成危岩的外因。基于对三峡库区危岩研究现状的分析从地貌学角度构建了危岩发育链式机理,将危岩发育过程分为初始阶段、河谷下切阶段、差异风化阶段、临界岩腔形成阶段、初始危岩体形成阶段、危岩崩落初始阶段、危岩崩落连锁阶段、微观链完成阶段共八个阶段;将危岩失稳阶段分为自由落体、初始弹跳和后继弹跳等三个阶段,运用运动学原理初步建立了危岩失稳运动路径计算方法;探索了危岩研究的新方向。更多还原

【Abstract】 As one of main geologic disasters in the Three Gorges Reservoir area, unstable rock display somefeatures such as much quantity, distribution over the area, less stability and strong danger. It are internal reasonsthat stratum composed of weak rock and hard rock, steep landform and strong unloading, while both fissurepressure and earthquake force are external reasons for unstable rock to develop. Based on review of studies currentto unstable rock in the Three Gorges Reservoir area,the authors established bond mechanism in Geomorphology,then divided develop process of unstable rock into eight stages, i.e. initial stage, river cut stage, differenceweathering stage, critical rock cell stage, initial stage for unstable rock to form, initial avalanche stage of unstablerock, interval avalanche stage of unstable rock and ending stage of micro-bond. Further avalanche of unstable rockis divided three stages, i.e. gravity stage, initial jump stage and post jump stage, and move path calculate methodfor unstable rock to avalanche is established in kinematics. In the end the authors approach some new topics in theresearch of unstable rock.更多还原