绵竹市走马岭沟5#支沟泥石流进一步治理工程分析研究

发布时间：2018-06-19 01:34

本文选题：走马岭沟泥石流 + 活动特征　；参考：《西南交通大学》2015年硕士论文

【摘要】：“5.12”汶川地震,使得灾区各项基础建设受损严重,造成巨大的人员损失、经济损失；除此外,地震诱发了大量的地质次生灾害。其中,山体崩塌和滑坡等直接地为泥石流发生和发展提供了松散的固体物源,可能致使流域内发育的泥石流沟在比较长的一段时间中均处于非常活跃的时期。走马岭沟地理位置在绵竹市清平乡盐井村6组,绵竹市清平乡银杏沟旅游区内,为绵远河左岸支流,曾是“5.12”汶川地震重灾区之一。大地震后,走马岭沟沟域内各类地质次生灾害频发。2010年“8.13”走马岭沟特大泥石流灾害爆发后,进行了全面又大规模的泥石流灾害防治工程。但是由于地震后沟域内松散固体物源的大大增多,每次遭到大暴雨均会引发大规模的泥石流灾害,已治理的工程有部分损毁。基于此,开展绵竹走马岭沟泥石流治理工程的调查及防治效果的研究,总结此类泥石流治理工程的防治方法,进一步采取对工程的补充措施是非常必要的。本文以绵竹市清平乡走马岭沟泥石流治理工程作为例子,走马岭沟位属2008年汶川特大地震带内,在绵竹市清平乡银杏沟旅游区。2008年的特大地震不仅造成严重的经济财产损失,还造成了清平乡不少的人员伤亡,同时地震还诱发了为数众多的次生地质灾害,如泥石流、滑坡、崩塌等。为尽快消除地质灾害隐患,促进灾后恢复重建工作顺利实施,2010年“8.13”走马岭沟特大泥石流灾害爆发后,进行了全面又大规模的泥石流灾害防治工程。走马岭沟泥石流工程治理采用以“拦为主、排为辅”的治理方案,工程竣工后受到强降雨的检验,工治理程效果得到初步显现。但主体工程完成后受多次强降雨的影响,部分附属工程结构损坏,针对工程设计中存在的缺陷,加以了分析总结,针对泥石流目前情况,重新提出了三种补充、修复方案：方案1：新建5#支沟排导槽+6#、7#坝清淤+垂裙修复+防冲墙基础修复+过水路面清淤+停淤场围堤修复+主沟坝体修复；方案2：5#坝加高+5#坝清淤+垂裙修复+防冲墙基础修复+过水路面清淤+停淤场围堤修复+主沟坝体修复；方案3：5#坝清淤+6#坝清淤+5#支沟防护堤+防冲肋坎+防冲墙基础修复+过水路面清淤+停淤场围堤修复+主沟坝体修复,上述三个方案的治理范围不同,工程项目与规模不同,将导致防治工程数量、投资上存在一定的差别。论文最后根据现场治理的实际效果进行分析研究、评价以及建议措施。
[Abstract]:The "5.12" Wenchuan earthquake caused serious damage to the infrastructure in the disaster area, resulting in huge loss of personnel and economy, in addition to the earthquake induced a large number of geological secondary disasters. Among them, landslides and landslides directly provide a loose solid source for the occurrence and development of debris flow, which may lead to the development of debris flow gullies in a relatively long period of time in a very active period. The geographical location of Ma Ling ditch is in 6 groups of Yanjing Village in Qingping Township, Mianzhu City, and in Ginkgo Ginkgo ditch tourist area of Qingping Township in Mianzhu City. It is a tributary on the left bank of Mianyuan River and was once one of the hardest hit areas of Wenchuan earthquake on "5.12". After the earthquake, various kinds of geological secondary disasters occurred frequently in the Tumaling gully region. After the "8.13" Tongma Linggou debris flow disaster broke out in 2010, a comprehensive and large-scale debris flow disaster prevention project was carried out. However, due to the increase of loose solid sources in the gully region after the earthquake, every time the rainstorm will lead to a large-scale debris flow disaster, the project has been partially damaged. Based on this, it is very necessary to carry out investigation and control effect research on debris flow control project of Mianzhu Walinggou debris flow, summarize the prevention and cure method of this kind of debris flow control project, and take further supplementary measures to the project. This paper takes the project of debris flow control in Qingping Township, Mianzhu City, as an example. It belongs to the Wenchuan earthquake zone in 2008 and is located in the Ginkgo Valley tourist area of Qingping Township, Mianzhu City. The huge earthquake of 2008 not only caused serious economic and property losses, At the same time, the earthquake also induced a large number of secondary geological disasters, such as debris flow, landslide, collapse and so on. In order to eliminate the hidden dangers of geological hazards as soon as possible and promote the smooth implementation of the work of post-disaster recovery and reconstruction, a comprehensive and large-scale debris flow prevention project was carried out after the "8.13" Luoma Linggou debris flow disaster broke out in 2010. The project of mud-rock flow control in Wumaling gully adopts the control scheme of "stop as the main project, drainage as auxiliary". After the completion of the project, it is examined by heavy rainfall, and the effect of engineering treatment process is preliminarily shown. However, the main project is affected by many heavy rainfall after completion, and some subsidiary engineering structures are damaged. In view of the defects in the engineering design, it is analyzed and summarized. In view of the current situation of debris flow, three kinds of supplements are put forward again. Restoration scheme: 1: new branch ditch drainage channel 6#yu7# dam desilting vertical skirt repair anti-scouring wall foundation restoration of water pavement silting and silt pit embankment restoration main ditch dam body repair; Scheme 2: 1 increasing the height of the desilting dam to repair the foundation of the anti-scour wall, the foundation of the water pavement, the siltation and siltation field, the embankment, the main ditch dam body, the restoration; Plan 3: 1 desilting 6 # Dam desilting by using the foundation of the embankment, the foundation of the anti-scouring rib and the anti-scouring wall to repair the main ditch dam body, the above three schemes have different control scope, such as the foundation repair of the water pavement, siltation and siltation field, the surrounding embankment and the main ditch dam body repair. The difference of project and scale will lead to the quantity of prevention and cure project and the difference of investment. Finally, according to the actual effect of field management, the paper analyzes, evaluates and suggests measures.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.23

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