| 某高速公路朱雀洞段红层滑坡成因机制分析与整治对策 |
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| 引用本文： | 李俊,彭振斌,曹佳文.某高速公路朱雀洞段红层滑坡成因机制分析与整治对策[J].中国地质灾害与防治学报,2009,20(2):15-19. |
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| 作者姓名： | 李俊 彭振斌 曹佳文 |
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| 作者单位： | 中南大学地学与环境工程学院,湖南,长沙,410083 |
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| 摘 要： | 湖南省西部地区高速公路路线红层滑坡灾害普遍存在。根据湘西某高速公路朱雀洞段滑坡的工程地质特性、形态、结构特征及变形破坏特征,分析了滑坡的形成机制,指出其属滑移—拉裂型滑坡。在经受自重应力、降雨以及地下水等内外作用因素,斜坡岩体沿软弱结构面发生滑移变形,随着剪裂面上的拉应力集中而产生拉裂缝,一旦破坏面贯通,则导致滑坡破坏。通过参数反演,对滑坡的稳定性进行了定量评价。从评价结果可见,在天然情况下,滑坡处于稳定状态。而在暴雨情况下,其稳定性迅速降低,基本处于不稳状态。在分析成因机制的基础上为滑坡的整治对策提供了重要的依据。
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| 关 键 词： | 红层软岩 顺层滑坡 成因机制 整治对策 |
The analysis of formation mechanism and treatment for red beds landslide in Zhuquedong segment of expressway |
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| LI Jun,PENG Zhen-bin,CAO Jia-wen.The analysis of formation mechanism and treatment for red beds landslide in Zhuquedong segment of expressway[J].The Chinese Journal of Geological Hazard and Control,2009,20(2):15-19. |
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| Authors: | LI Jun PENG Zhen-bin CAO Jia-wen |
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| Institution: | (Department of Geosciences and Environmental Engineering, Central South University, Changsha 410083, China) |
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| Abstract: | Red beds landslides hazards are widely distributed in expressways of west of Hunan Province.According to analysis of the landslide s engineering geology character,conformation,construction characteristics and landslide' s deformation character,the formation mechanism of the landslide is analyzed.It shows that the landslide belongs to slidingbending type.Suffering from gravitation,rainfall and groundwater action etc.,the slope slides along the weak structural surface,and the cracks occour with the draught stress concentration.Once the breakage surface is transfixed,the slope will slide down.By parameter anti deducing,the stability of the landslide is evaluated quantitatively.It comes to the conclusion that under natural circumstance,the landslide is always in the stable state,while in the rain-storm circumstance,its stability falls quickly to be unsteady state.On the base of studying its formation mechanism,this process provides important geological basis for landslide treatment measure. |
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| Keywords: | soft layer in red beds bedding landslides formation mechanism treatment measure |
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