甘肃东部某黄土-红层接触面滑坡成因分析
首发时间:2012-11-30
摘要:黄土-红层接触面滑坡是指以黄土-第三系红色泥岩接触面为滑面发生的黄土滑坡,甘肃省东部地区这类滑坡灾害众多。因工程需要且滑坡已威胁到附近村庄的安全,故本文在分析研究已有资料的基础上,对甘肃省东部地区某黄土-红层接触面滑坡进行了研究。基于滑坡区地质环境和滑坡的特点,研究了滑坡的类型及其结构,重点分析了该滑坡的形成条件和诱发因素,指出降雨是影响该滑坡形成与演化的主要因素,可为该类滑坡的稳定性评价及其治理提供一定的参考。
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Analysis on the formative mechanism of the loess-red mudstone-surface landslide in east part of Gansu
Abstract:Loess-red mudstone-surface landslides are such kind of landslides of which the slippage surface is the contact surface between the Quaternary loess and the Tertiary red-layer. Because the project need and the landslide is already threatening the safety of the nearby villages, so based on the study existent data, we take one of such landslides in east part of Gansu province, where such landslides happening frequently, as a case in this paper. Based on the geological environment and the characteristics of the landslide, we analysis the type of landslide and its structure. As the key, we analysis the formative conditions and inducing factors of the landslide, and point out that the rainfall has important influence of the formation of the landslide, which could provide a reference values for the stability evaluation and treating approaches of such kinds of landslides.
Keywords: Loess landslides East part of Gansu Mechanism analysis
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