[1]邱 俊,任光明,吴龙科,等.金沙江某水电站左坝肩岩体双面倾倒形成机制[J].山地学报,2016,(01):77-83.[doi:10.16089/j.cnki.1008-2786.000103]
　QIU Jun,REN Guangming,WU Longke,et al.Double-sided Toppling Formation Mechanism of Rock Mass on the Left Abutment of a Hydropower Station Dam in Jinsha River[J].Mountain Research,2016,(01):77-83.[doi:10.16089/j.cnki.1008-2786.000103]
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金沙江某水电站左坝肩岩体双面倾倒形成机制()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2016年01期
页码:
77-83
栏目:
山地灾害
出版日期:
2016-02-01

文章信息/Info

Title:
Double-sided Toppling Formation Mechanism of Rock Mass on the Left Abutment of a Hydropower Station Dam in Jinsha River
作者:
邱 俊1; 任光明1; 吴龙科1; 陈 超1; 韦振新2; 鲁 博2
1．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，四川 成都 610059； 2．中国电建集团西北勘测设计研究院有限公司，陕西 西安，710065
Author(s):
QIU Jun1; REN Guangming1; WU Longke1; CHEN Chao1; WEI Zhenxin2; LU Bo2
1 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu Sichuan 610059，China； 2. Power China Xibei Engineering Corporation Ltd.，Xi’an 710065，China
关键词:
层状边坡; 双面倾倒; 变形破坏; 形成机制
Keywords:
stratified slope;  double-sided toppling;  deformation and failure;  formation mechanism
分类号:
P642
DOI:
10.16089/j.cnki.1008-2786.000103
文献标志码:
A
摘要:
倾倒变形是层状边坡的一种主要变形破坏形式，在以往研究中，单面倾倒已研究较多而双面倾倒尚无研究成果。在充分研究金沙江某水电站左坝肩岩体双面倾倒变形特征基础上，对其形成机制进行了地质分析和数值模拟，揭示了双面倾倒岩体主要是在二次应力场作用下岩体沿片理面产生剪切错动、滑移、拉裂从而岩体产生弯曲或折断而形成的。其中顺倾边坡的倾倒变形始于坡脚，并以“滑移-倾倒”式逐渐向坡后发展，其倾倒扩展速率及倾倒深度明显小于反倾边坡；而反倾边坡初始倾倒位置不一定在坡脚，而是始于其最有利倾倒位置，该位置受初始坡形、所受应力及岩性组合等因素控制，并用数值模拟揭示了该水电站边坡初始倾倒位置在距坡脚约1/3坡高处，此后，当岩层倾角足够陡时，在该初始倾倒位置的上部岩层可表现出一定的“滑移-倾倒”性质，而该位置下部岩层则总是表现出“压致型”倾倒特征；无论顺倾还是反倾边坡，倾倒变形速率有从坡体中部附近向两端递减的趋势。
Abstract:
Toppling deformation is a major failure form of stratified slope. In previous studies, single-sided toppling has been deeply studied but there is no research on double-sided toppling. Based on fully study on toppling deformation characteristics of rock mass on the left abutment of a hydropower station dam in Jinsha River in west China, geology analysis and numerical simulation have been carried on formation mechanism of double-sided toppling, disclosing that it’s mainly caused by the secondary state of stress when it leads rock to be bended or broken off by means of dislocating, slipping and fracturing. And the initial toppling position of dip slope is always at the toe，and then develop the way of “slip-toppling”; But the initial toppling position of anti-dip slope is controlled by initial slope form, stress, lithology, etc, and its toppling development rate and depth is greater. Then numerical simulation conducted to announce that the initial toppling position of the hydropower station slope begins at a third height of the slope from the toe. After that, the upper terrane can appear some characteristics of “slip-toppling”, but the lower terrane always appear the characteristics of “pressure to toppling”. However, both the dip and the anti-dip slope have the trend that the toppling deformation rate is diminishing from the middle to the both ends.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2015-07-27。 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）：邱俊(1989-)，男，在读硕士研究生，工程地质专业。[Qiu Jun，master degree candidate，major in engineering geology.] E-mail：671136114@qq.com
更新日期/Last Update: 1900-01-01