| Micromorphology of landslide soil——Case study on the Jibazi landslide in Yunyang in the Three Gorges Region, China |
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| 作者姓名： | HE Yurong CUI Peng LIAO Chaolin ZHANG Baohua ZHAO Yu |
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| 作者单位： | Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Science ＆ Ministry of Water Conservation, Chengdu 610064, China |
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| 摘 要： | Introduction The studies on landslides in the Three Gorges Region were conducted, e.g., those on affecting factors and forming mechanism of landslide (YIN Kunlong et al. 1998, DENG Qinglu et al. 2000, CHEN Yongbo et al. 2003, XU Qiang et al. 2003), on ris…
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| 关 键 词： | 山崩 三峡工程 动力地质作用 云阳县 |
| 文章编号： | 1672-6316（2006）02-0147-11 |
| 收稿时间： | 2006-04-17 |
| 修稿时间： | 2006-05-09 |
Micromorphology of landslide soil |
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| HE Yurong CUI Peng LIAO Chaolin ZHANG Baohua ZHAO Yu.Micromorphology of landslide soil[J].Journal of Mountain Science,2006,3(2):147-157. |
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| Authors: | Yurong He Peng Cui Chaolin Liao Baohua Zhang Yu Zhao |
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| Institution: | (1) Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Science & Ministry of Water Conservation, Chengdu, 610064, China |
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| Abstract: | Landslide is one of natural catastrophes affecting national economy and people’s livelihood. There are many reports on the
forming mechanism and control of landslide, but the studies on micromorphology of landslide soil are few. There are many potential
landslides in the Three Gorges Region in China. In this paper, the micromorphologic features of the Jibazi landslide soil
in Yunyang in the Three Gorges Region of the Yangtze River were studied using routine methods, that is, soil micromorphology,
X-ray diffractometer and scanning electron microscope. The main conclusions are as follow: (1) The basic micromorphologic
characteristics of the landslide soil are that the fine soil particles are commonly cohesive matrix, finer and lower content
of skeleton grains, the microstructures are mainly types of phenocrystal gelatinization, densely chap and fissure structure.
As a result, these micromorphologic features affect the discharging of soil water, favor the movement of landslide body and
provide an internal basis of materials for the formation of landslide. (2) The concept on the forming material of landslide
was proposed, and types of optical beamed clay aggregates, Fe-Mn isolates and glassy material were found in landslide-belt
soil, which were remarkably different from the natural soil formation, and had some scientific significance in analyzing the
forming mechanism of landslide and distinguishing the landslide-belt soil. (3) Some special micromorphologic and sub-micromorphologic
characteristics, such as fingerprint microstructure, clay beamed bedding microstructure, oppressive microstructure, moulage
microstructure and extending hole microstructure, could bring useful micromorphologic evidences for the observation and forecasting
of landslide. The results mentioned above will bring helpful micromorphologic evidences for distinguishing slide soil, analyzing
the formation mechanism of landslide, and monitoring and forecasting the occurrence of landslide. |
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| Keywords: | Landslide Microstructure forming material of landslide Three Gorges Region China |
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