[1]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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Analysis of Causes and the Development Characteristics of the Rock Landslide in Gonza Village,the Upper Jinsha River
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 02
Page number:
242-250
Column:
Public date:
2021-06-30
- Title:
- Analysis of Causes and the Development Characteristics of the Rock Landslide in Gonza Village,the Upper Jinsha River
- Keywords:
- upper reaches of the Jinsha River; anti-dipping rock landslide; toppling deformation; earthquake effect
- CLC:
- P642.22
- DOI:
- -
- 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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Last Update:
2021-06-30