青川县赵家山滑坡-碎屑流特征及危害性研究

发布时间：2018-01-26 02:50

本文关键词： 滑坡-碎屑流地震稳定性灾害链　出处：《西南交通大学》2016年硕士论文　论文类型：学位论文

【摘要】：在“5.12”地震中,形成了大量的地质灾害,而滑坡-碎屑流由于其超远的位移、运动速度快,往往能够引发灾难性的后果,造成严重的生命财产损失。本文分析了相关的滑坡—碎屑流,并以青川县赵家山滑坡-碎屑流为素材,通过现场调查分析、钻探等工作手段,对赵家山滑坡—碎屑流的特征、危害性进行了分析、研究。赵家山滑坡-碎屑流位于四川省青川县七佛乡,根据其运动特征及分布位置,滑坡分为滑源区和冲击阻挡区、抛射运动及堆积区,体积约4.11×105m3。灾害体宽约100m,从后缘到前缘约1000m,在“5.12”地震后两小时后发生滑动。滑坡-碎屑流整体呈一不规则形状,按照形态可分为滑源区、冲击阻挡区、抛射运动及堆积区。滑坡-碎屑流发源于滑源区；滑塌后在在其下侧冲击,但受到前方鼓丘山体阻挡改道,从而形成冲击阻挡区；而后由于地形地貌等原因从而运动、堆积形成抛射运动及堆积区。赵家山滑坡-碎屑流在“5.12”地震的强烈震动效应的先决条件下,在其特殊的地形条件下形成的,滑源区顶端与堆积区最前缘高差约390m。本文基于现状不仅对残留体边坡稳定性进行定量分析评价,还对滑坡-碎屑流次生灾害链进行了分析评价。根据地质灾害防治的指导思想与防治原则,并结合灾害的发生条件、活动特点、危害状况及灾害体自身的特点和规律,在综合考虑工作量、施工安排、资金投入、防治效果等方面的基础上,提出治理方案。
[Abstract]:In the "5.12" earthquake, a large number of geological disasters have been formed, and the landslide and debris flow, due to its ultra far displacement and rapid movement, can often lead to disastrous consequences. This paper analyzes the related landslide-debris flow, and take Zhaojiashan landslide-debris flow as the material, through on-site investigation and analysis, drilling and other working methods. The characteristics and harmfulness of Zhaojiashan landslide-clastic flow are analyzed and studied. Zhaojiashan landslide-clastic flow is located in Qifu Township Qingchuan County Sichuan Province according to its movement characteristics and distribution position. The landslide is divided into sliding source area and impingement block area, ejection movement and accumulation area, the volume is about 4.11 脳 105m3.The width of the disaster body is about 100m, and from the back edge to the front edge is about 1000m. Two hours after the "5.12" earthquake, the landslide and debris flow showed an irregular shape, which can be divided into sliding source area and impingement block area according to the shape. The landslide-clastic flow originates from the source area of the slip; After the collapse, it impacts on its lower side, but it is blocked by the front drum hill mountain to change course, thus forming the impingement blocking area. Then because of the topography and geomorphology, the accumulation formed the ejection movement and the accumulation area. The Zhaojiashan landslide-clastic flow is under the precondition of the strong vibration effect of "5.12" earthquake. The height difference between the top of the slip source area and the front edge of the accumulation area is about 390 m. Based on the present situation, the stability of the residual slope is not only evaluated quantitatively in this paper. The secondary disaster chain of landslide and debris flow is also analyzed and evaluated. According to the guiding ideology and control principle of geological disaster prevention and control, combined with the occurrence conditions of disaster and the characteristics of activities. On the basis of comprehensive consideration of workload, construction arrangement, capital investment, prevention effect and so on, the control scheme is put forward.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P642.2

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