汶川地震后四川省巴州区地质灾害特征研究
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摘要
5.12汶川大地震震后,对四川省巴州区次生地质灾害应急调查表明,地质构造和地形地貌是巴州区地质灾害形成的主导因素,降雨是地质灾害的主要诱发因素。巴州区主要的地质灾害类型为崩塌和滑坡,其中崩塌的危害性较大。现场调查表明,巴州区崩塌地质灾害类型以岩质崩塌为主,滑坡地质灾害类型以残积层滑坡为主,主要分布在构造侵蚀中低山和侵蚀剥蚀桌状低山地貌区。5.12汶川地震对潜在的崩塌危岩体的稳定性有不良的影响。
This paper presents the results of site investigation on the influence of the 5·12 Wenchuan Earthquake on the geological hazards in Bazhou region of Sichuan province.The paper considers that the geological structure and landform are the fundamental factors that control the geological hazards in this region.The rainfall is the most important one among the geological hazard inducing factors.The site investigation reveals that collapses and landslides are the main types of geological hazards.The main form of collapses in this region is rock fall and the main form of landslides is eluvium landslide.Both of them distribute on low-mid mountain regions with the eroded landforms that are so-called rock desks.The analysis shows that the earthquake has greatly weakened the stability of potential collapse rock slopes.
This paper presents the results of site investigation on the influence of the 5·12 Wenchuan Earthquake on the geological hazards in Bazhou region of Sichuan province.The paper considers that the geological structure and landform are the fundamental factors that control the geological hazards in this region.The rainfall is the most important one among the geological hazard inducing factors.The site investigation reveals that collapses and landslides are the main types of geological hazards.The main form of collapses in this region is rock fall and the main form of landslides is eluvium landslide.Both of them distribute on low-mid mountain regions with the eroded landforms that are so-called rock desks.The analysis shows that the earthquake has greatly weakened the stability of potential collapse rock slopes.
引文
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[7]田华.影响边坡稳定的因素分析[J].山西水利,2004,(6):63.Tian Hua.Analysis of factors influencing slope stability.ShanxiWater Resources,2004,(6):63.
[8]王存玉.人为地质灾害和地质环境[J].工程地质学报,1997,5(4):362~367.Wang Cunyu.On the artificial geological disaster and geoenviron-ment.Journal of Engineering Geology,1997,11(4):362~367.
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