永胜片角泥石流形成条件与防治对策研究

发布时间：2018-02-25 22:27

本文关键词： 泥石流动力学参数形成条件防治对策拦渣坝谷坊坝　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：永胜县是云南省泥石流灾害最严重的地区之一。古格村大箐流域分别于2001年、2003年、2006年等先后多次发生崩塌、滑坡和泥石流等重大地质灾害,导致流域内“五年一大灾,三年一中灾,年年有小灾的局面”。因此,必须加强对泥石流灾害的勘查、研究、防治与预报预警,从而尽可能地减少泥石流灾害所造成的损失。本文首先从热河古格村大箐泥石流沟发育的地质环境入手,继而对热河古格村大箐泥石流沟谷特征、分区特征和形成条件进行详细分析,并计算泥石流主要的动力学参数,对泥石流的活动性和发展趋势进行评估,为泥石流的防治对策研究提供相应的理论和数据。通过调查确定大箐泥石流沟是属沟谷型发展期高频率中型稀性泥石流,泥石流防治工程安全等级为三级,相应的设计标准按30年一遇流量设计,50年一遇流量校核。大箐泥石流沟处于发展期,地灾险情等级为大型,严重威胁下游居民和建筑物的安全,因此进行泥石流防治是十分必要的。通过对热河古格村大箐泥石流的形成条件和运动特征的分析,提出了泥石流的防治对策,采取拦挡、排导和生物相结合的综合治理方案。提出了流通区设置拦渣坝和谷坊坝,以固床压坡稳定沟床的物质,减小洪峰流量;在堆积区设置防护堤,达到防灾减灾的目的。还对建立泥石流的监测和保护热河古格村大箐的生态环境等方面提出了相应的建议。
[Abstract]:Yongsheng County is one of the most serious debris flow disasters in Yunnan Province. On 2001, 2003, 2006 and other major geological disasters such as collapse, landslide and debris flow occurred successively in the Daqing basin of Guge Village, which resulted in "one disaster every five years" in the basin. Three years, one disaster, every year there is a small disaster situation ". Therefore, it is necessary to strengthen the exploration, research, prevention, control and early warning of debris flow disasters. In order to reduce the losses caused by debris flow disasters as far as possible, this paper begins with the geological environment of the development of debris flow gullies in Daqing of Gehe Guge village, and then analyzes the characteristics of the debris flow gullies of Daqing in Gehe Guge village. The zoning characteristics and formation conditions are analyzed in detail, the main dynamic parameters of debris flow are calculated, and the activity and development trend of debris flow are evaluated. Through investigation, it is determined that Daqing debris flow trench is a high-frequency medium dilute debris flow in the development period of gully type, and the safety grade of debris flow prevention and control project is three levels. The corresponding design standards are designed according to the one-time discharge of 30 years and checked once in 50 years. The debris flow gully in Daqing is in the developing period, and the disaster risk level is large, which seriously threatens the safety of the downstream residents and buildings. Therefore, it is very necessary to prevent and cure debris flow. By analyzing the forming conditions and movement characteristics of debris flow in Daqing of Gehe Guge Village, the paper puts forward the prevention and control measures of debris flow, and adopts blocking, In order to stabilize the material of the ditch bed and reduce Hong Feng's discharge, the authors put forward a comprehensive treatment plan of combining the discharge of discharge and biology. In order to fix the bed pressure, stabilize the material of the ditch bed, set up the berm in the accumulation area, set up the berm in the accumulation area, To achieve the purpose of disaster prevention and mitigation, some suggestions are put forward to establish the monitoring of debris flow and to protect the ecological environment of Daqing in Gehe Guge village.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.23

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