[1]吴龙科,任光明,郑秀红,等.西北某坝肩变形体成因机制的离散元数值模拟[J].山地学报,2015,(01):81.
 WU Longke,REN Guangming,ZHENG Xiuhong,et al.Formation Mechanism of the Deforming Slope in Left Dam Abutment of a Hydroelectric Power Station in Northwest China with and Discrete Element Simulation Method[J].Mountain Research,2015,(01):81.
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西北某坝肩变形体成因机制的离散元数值模拟()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2015年01期
页码:
81
栏目:
山地灾害
出版日期:
2015-02-01

文章信息/Info

Title:
Formation Mechanism of the Deforming Slope in Left Dam Abutment of a Hydroelectric Power Station in Northwest China with and Discrete Element Simulation Method
作者:
吴龙科;任光明;郑秀红;陈超;沈启香;王飞;王海涛;
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);中国水电顾问集团西北勘测设计研究院;
Author(s):
WU LongkeREN GuangmingZHENG XiuhongCHEN ChaoSHENG QixiangWANG FeiWANG Haitao
1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China; 2. Northwest Investigation & Design Research Academy,State Power Corporation,Xi’an 710065,China
关键词:
地震顺层岩质边坡成因机制离散元数值模拟
Keywords:
earthquakerock bedded slopegenetic mechanismdiscrete element numerical simulation
分类号:
P642.2,TU457
文献标志码:
A
摘要:
通过对西北某坝肩边坡勘探平硐的现场调查,综合分析边坡的基本特征、岩体结构特征、坡体结构特征、变形破坏特征,认为坡体为形成年代比较久远的变形体,在自重的作用下坡体发生缓慢的变形,地震的作用加速了坡体的变形,从而形成了现今的变形体,但坡体未发生整体的失稳。由于坡体变形年代比较久远,故采用离散元数值模拟对其成因机制进行研究。研究结果表明:自重作用下坡体有沿缓倾坡外层面缓慢滑移变形的趋势,在地震荷载的作用下最终诱发边坡发生比较大的变形。坡体在变形过程中经历了启动、高速变形和自稳3个阶段,在启动阶段坡肩位置首先出现拉张裂缝,然后坡体中部出现变形,最后坡脚位置剪出。通过坡体中监测点加速度、速度的研究发现随...
Abstract:
Through the investigation of deformed slope in left dam in northwest china by Exploration adits, the article research the basic characteristics, rock mass structure characteristics, structural characteristics of slope, deformation characteristics of slop. Come to a conclusion that the deformed slop formed for a long time. The deformation occurs slowly in the action of gravity, then, Earthquake accelerated the deformation of slop. Thus the deformed slop was formed, the slop had no overall instability. Due to the deformed slop formed in a long time, the article research formation mechanism of the deformed slope in left dam abutment of a hydroelectric power station in northwest China with discrete element simulation method. The results show that deforming slope inclined gently by the lowangle rock level under the action of gravity and was instability under seismic loads. The simulation of the subsequent movement of the slope shows that the movement mode of deformable body is startingup →highspeed sliding→selfstabilized. Slop shoulder position fist appear tensile crack in the startup phase, then the middle of slop deformed, finally cut out in the bottom of slop. Topographic amplification effects are also observed from both acceleration and velocity of the monitoring points of the slope.

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备注/Memo

备注/Memo:
收稿日期(Received date):2014-04-02;改回日期(Accepted):2014-05-22。
基金项目(Foundation item):国家自然科学
基金项目(41072229) 。[Supported by National Nature Science Foundation of China(NO:41072229).]
作者简介(Biography):吴龙科(1987-),男,在读硕士,工程地质专业 [Wu Longke,master degree candidate ,major in engineering geology.] E-mail:wulongke1202@163.com
更新日期/Last Update: 1900-01-01