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首页> 外文期刊>Environmental geology and water sciences >On evaluating the stability of the Baiyian ancient landslide in the Three Gorges Reservoir area, Yangtze River: a geological history analysis
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On evaluating the stability of the Baiyian ancient landslide in the Three Gorges Reservoir area, Yangtze River: a geological history analysis

机译：长江三峡水库库区白岩古滑坡稳定性评价的地质历史分析

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摘要

Numerous landslides have occurred during the construction of the Three Gorges Reservoir of the Yangtze River. Although the underlying causal factor of these landslides was heavy rainfall, the construction process was the trigger of some of them. We report here a systematic study aimed at reconstructing the geological history of an ancient landslide and, based on our results, an evaluation of the role of the history on current landslide stability. Data from detailed field surveys and the studies on geological dating revealed that the Baiyian landslide was composed of five structural parts of different geological ages, such as a sliding belt, disturbed rocks, ancient colluvium, alluvium of the Yangtze River and slope wash. The succession of ancient climates, terraces and tectonic processes in the study area were examined from 300 ka ago. The evolutionary history of the Baiyian ancient landslide can be divided into five distinct stages: development, occurrence, deposition, collapse and disintegration. Some parts of the ancient landslide are currently prone to instability due to the combination effects of heavy rainfall and construction of the reservoir.
机译：长江三峡水库建设期间发生过多次滑坡。尽管这些滑坡的潜在成因是大雨，但施工过程却是其中一些的触发因素。我们在这里报告了一项旨在重建古代滑坡的地质历史的系统研究，并根据我们的结果评估了历史对当前滑坡稳定性的作用。详细的现场调查和地质定年研究的数据表明，白岩滑坡由不同地质时代的五个结构部分组成，如滑带，扰动的岩石，古冲积层，长江冲积层和斜坡冲刷层。从300 ka以前研究了研究区的古代气候，阶地和构造过程的演替。白岩古滑坡的演化历史可分为五个不同的阶段：发育，发生，沉积，崩塌和崩塌。由于暴雨和水库建设的共同作用，古代滑坡的某些地区目前易于不稳定。

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