首页 | 本学科首页   官方微博 | 高级检索  
     检索      

澜沧江上游某倾倒变形体蓄水作用下演化机制分析及稳定性评价
引用本文:曾阳益,邓辉,张咪,涂国祥.澜沧江上游某倾倒变形体蓄水作用下演化机制分析及稳定性评价[J].科学技术与工程,2016,16(25).
作者姓名:曾阳益  邓辉  张咪  涂国祥
作者单位:成都理工大学 地质灾害防治与地质环境保护国家重点实验室,成都理工大学 地质灾害防治与地质环境保护国家重点实验室,成都理工大学 地质灾害防治与地质环境保护国家重点实验室,成都理工大学 地质灾害防治与地质环境保护国家重点实验室
基金项目:中国地质调查局西南深切河谷地区斜坡地质灾害调查评价工作(编号:12120113010500),国家自然科学(编号:41272332)
摘    要:澜沧江上游某电站左岸近坝大面积发育倾倒变形体。倾倒变形体早期河谷下切,受重力作用,产生一定范围的倾倒变形破坏,水库蓄水以后,地下水位抬升,倾倒变形体将被大面积浸泡并软化,导致其力学抗剪强度指标降低,倾倒变形体将有可能发生失稳破坏,从而威胁到水电站建筑物尤其是大坝的安全。该处倾倒变形体较为典型,结合相关地质资料建立二维离散元模型分析倾倒变形体不同部位变形破坏特征,成因机制,以及进一步发展演化机制。通过三维数值模拟分析其蓄水前后应力应变,并根据刚体极限平衡理论,对倾倒变形体在多种工况下不同破坏模式稳定性进行验算。

关 键 词:倾倒变形体  变形破坏特征  成因机制  数值模拟  稳定性
收稿时间:2016/3/22 0:00:00
修稿时间:2016/5/12 0:00:00

Analysis and stability evaluation of the evolution mechanism of a dump deformation body in the upper reaches of Lancang River
ZENG Yangyi,DENG Hui,ZHANG MI and TU Guoxiang.Analysis and stability evaluation of the evolution mechanism of a dump deformation body in the upper reaches of Lancang River[J].Science Technology and Engineering,2016,16(25).
Authors:ZENG Yangyi  DENG Hui  ZHANG MI and TU Guoxiang
Institution:State Key Laboratory of Geohazard Prevention and Geoenironment Protection,Chengdu University of Technology,State Key Laboratory of Geohazard Prevention and Geoenironment Protection,Chengdu University of Technology,State Key Laboratory of Geohazard Prevention and Geoenironment Protection,Chengdu University of Technology
Abstract:Lancang river upstream one on the left bank power station of large area development has fallen close to the dam deformation. Dump deformation early incised valley, the gravity, produce a range of dumping of deformation and failure, reservoirs, underground water level, dump deformation will be large soaking and softening, and results in the decrease of its mechanical shear strength index, dumping of instability and failure of deformation is likely to happen, which threatens the safety of hydropower station building especially dam. It was typical dump deformation, combining with related geological data to establish a two-dimensional discrete element model analysis of dumping of deformation and failure characteristics of different part of body, formation mechanism and evolution mechanism and further development. Before and after the impoundment of the three through three-dimensional numerical simulation analysis of the stress and strain, and according to the rigid body limit equilibrium theory, the dumping of deformation in a variety of different failure modes under the condition of stability calculation.
Keywords:toppling rock mass  genetic mechanism  Deformation and failure characteristics  numerical simulation  stability
本文献已被 CNKI 等数据库收录!
点击此处可从《科学技术与工程》浏览原始摘要信息
点击此处可从《科学技术与工程》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号