摘要
在地质调查和现场监测的基础上,研究了望霞W1危岩体变形-演化的动力学过程。危岩体位于重庆市巫山县两坪乡,受裂隙切割成柱状。岩性为中厚层硅质、泥质灰岩夹燧石层,危岩体下部基座为粉砂岩、粘土岩及煤线,形成上硬下软的地层结构。研究表明:危岩体局部变形失稳过程与整体失稳过程的位移变形曲线表现出相似性,可划分为前期累积变形、匀速变形、加速变形和临界加速变形等四个阶段。望霞危岩的特殊地质结构、地质环境为危岩的孕育和破坏提供了地质基础。人为活动和降雨对危岩的变形破坏具有显著的影响。
The analysis of the failure process of the Wangxia dangerous rockmass W1 was performed based on the geological investigation and displacement on-site monitoring data. The Wangxia dangerous rockmass, which is cutted by fissures into a cylindrical shape, is located in Liangping of Wushan county in Chongqing, China. The lithology of the dangerous rockmass is medium or thick layer of chert siliceous argillaceous limestone with intercalation of shale, claystone and coal line. They constituent the hard rock on the slope of soft structure. The research results indicate that the displacement deformation curves of the local and whole dangerous rockmass shows the similarity of process, which can be divided into four stages of the early accumulated deformation, uniform deformation, acceleration deformation and critical deformation. The geological structure and environment of the dangerous rockmass provide the basis for its foundation of deformation and instability. Human activity and rainfall have significant effect on its deformation and failure.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2014年第1期96-100,111,共6页
Hydrogeology & Engineering Geology
基金
三峡库区危岩体变形机理研究与监测预警(12120113008200)
国家自然科学基金项目(41102201)
关键词
望霞危岩
变形监测
降雨
演化过程
dangerous rockmass
deformation monitoring
rainfall
evolution process
