|本期目录/Table of Contents|

[1]郭明珠,刘 晃,王欢欢,等.金沙江上游贡扎村岩质滑坡发育特征及演化成因分析[J].地震研究,2021,44(02):242-250.
　GUO Mingzhu,LIU Huang,WANG Huanhuan,et al.Analysis of Causes and the Development Characteristics of the Rock Landslide in Gonza Village,the Upper Jinsha River[J].Journal of Seismological Research,2021,44(02):242-250.
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金沙江上游贡扎村岩质滑坡发育特征及演化成因分析(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
44
期数:
2021年02期
页码:
242-250
栏目:
出版日期:
2021-06-30

文章信息/Info

Title:
Analysis of Causes and the Development Characteristics of the Rock Landslide in Gonza Village,the Upper Jinsha River
作者:
郭明珠; 刘 晃; 王欢欢; 邹 玉; 马 可
(北京工业大学 建筑工程学院,北京 100124)
Author(s):
GUO Mingzhu; LIU Huang; WANG Huanhuan; ZOU Yu; MA Ke
(College of Civil Engineering and Architecture,Beijing University of Technology,Beijing 100084,China)
关键词:
金沙江上游;  反倾岩质滑坡;  倾倒破坏;  地震作用
Keywords:
upper reaches of the Jinsha River;  anti-dipping rock landslide;  toppling deformation;  earthquake effect
分类号:
P642.22
DOI:
-
摘要:
以金沙江上游贡扎村滑坡为研究对象,对滑坡滑床及堆积体进行现场调查,研究结果表明:①该区滑坡主要受岩层层面和两组共轭节理控制,岩层倾向与坡向相反,属于反倾边坡; 堆积体内块石体积较大、形状规整,大部分保留母岩产状,在物质组成和结构上与滑床基岩存在较高相似性,判断贡扎滑坡为整体倾倒滑坡。②滑坡规模巨大,堆积体体积约4.5×107 m3,结合川藏地区金沙江流域地震活动特点,推测造成边坡大规模倾倒的主要原因是地震作用。③根据两级堆积体分布特点和滑坡后壁结构面发育特点,认为滑坡变形分为4个阶段:坡脚岩土体滑移、陡倾面拉裂、板梁弯曲折断和碎屑岩块堆积。地震是诱发滑坡的重要因素,坡内单一的岩性和岩层密集的节理是发生倾倒的内部原因,坡脚处岩土体滑移是倾倒发生的必要条件。
Abstract:
In this paper,we conduct a field investigation of the slide bed and the accumulation body of a landslide in Gonza village in the upper Jinsha River,Tibet and find that the landslide is mainly controlled by the rock layer and two sets of conjugate joints.The dip direction of the rock layer is opposite to the sliding direction,and the slope is anti-inclined.The blocks of the deposit body are large and regular-shaped,and most of them still retain the occurrence of the parent rock.And the composition and structure of the deposit rock are highly-similar with those of the rock of the slide bed.All these suggest that the Gonza landslide is a holistic toppling landslide.The landslide is in huge scale,with a volume of about 4.5×107 m3.In the light of the characteristics of seismic activities in the Jinsha River basin,we speculate that the main reason for the large-scale toppling of the slope is earthquake effect.According to the distribution of the two-stage accumulation bodies and the characteristics of the development of the structural surface on the back wall,we conclude that the landslide deformation consists of four stages:slope toe sliding,steeply-inclined surface cracking,cantilever beam bending and breaking,and clastic rock accumulating.Earthquakes serve as an important factor in inducing landslides.The single lithology and dense joints in the rock layers make up intrinsic factors causing toppling,while the toe slippage is a necessary condition.

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备注/Memo

备注/Memo:
收稿日期:2020-07-08
基金项目:青藏高原重大滑坡孕育的内外动力条件及其耦合作用机制“强震作用下斜坡岩体结构动力学响应特征”(2018YFC1505001)资助.
更新日期/Last Update: 2021-06-30