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摘要: 滑坡是樟木口岸主要的地质灾害,对樟木口岸古滑坡的研究是关系口岸可持续发展的最重要因素之一。通过口岸地质灾害整体勘察,以地质分析为基础,重新认识了古滑坡的规模、性质及机理。分析发现樟木口岸并非坐落在一个古滑坡体上,而是发育两个大型古滑坡,基岩顶面附近的残坡积粉质粘土或粉土与降雨是古滑坡形成的主控因素。古滑坡是由岩质崩滑形成的堆积物演变而成的碎石土滑坡,岩质崩滑的变形机制是弯曲—拉裂—压碎模式,古滑坡的形成机理为滑移—拉裂破坏模式。Abstract: Landslides are the main geological hazards in Zhangmu port in Tibet.Researching on Zhangmu port ancient landslide is one of the most important factors relevant to the sustainable development of Zhangmu port.On the basis of geologic analysis,authors realized dimensions,nature and mechanism of the ancient landslide trough the whole reconnaissance of the geological hazard again.It was discovered that Zhangmu port doesn’t located on one ancient landslide,but two ancient landslides.The rainfall and eluvial silty & silt near the top surface of bedrock are the two major factors of the ancient landslide formation.The ancient landslide is a debris landslide which was evolved from the rock collapse,whose deformation pattern included bend,tension and crush.The failure mechanism of the ancient landslide included two steps: glide and tensile failure.
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Key words:
- Zhangmu /
- ancient landslide /
- formation mechanism
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