基于GIS的成兰铁路地质灾害危险性评估研究

发布时间：2018-06-02 05:36

本文选题：强震次生地质灾害 + 信息管理　；参考：《西南交通大学》2013年硕士论文

【摘要】：成兰铁路地处我国四川省和甘肃省境内,线路所在区域山势巍峨,河谷深切,地势险峻,自然生态环境脆弱。线路穿越岷江断裂带、西秦岭断裂带和发生过"5.12”强烈地震的龙门山断裂带,三大岩性复杂出露,大地构造复杂,内外动力地质作用强烈。区域历经多次地震,诱发大量次生地质灾害,造成铁路沿线崩塌、岩堆、滑坡、泥石流等不良地质灾害比比皆是。因此,对区域内地质灾害进行危险性评估,以及对区域内地质灾害进行科学高效的管理,能够为地质灾害的防治及铁路综合选线的信息化提供有力支撑。本论文在野外地质调查及资料收集的基础上,根据成兰铁路地质灾害实际情况,在对地震次生地质灾害影响因素的分析后,综合选取影响地震次生地质灾害危险程度的评价指标,采用层次分析法确定指标权重,运用物元分析原理建立了地质灾害危险性评估物元模型,完成了对成兰铁路沿线典型工点的危险性评估工作,并利用GIS的图像显示功能实现对评估结果的可视化输出,为成兰铁路综合选线提供参考。论文还详细介绍了研究区地质灾害信息管理系统的设计与开发过程,系统采用GIS二次开发技术及数据库技术进行开发工作,实现了对研究区地质灾害信息的可视化显示、查询检索及综合管理,提高了地质灾害信息管理的效率。
[Abstract]:Cheng-lan railway is located in Sichuan and Gansu provinces in China. The railway line is located in the mountainous area, deep river valley, steep terrain and fragile natural ecological environment. Through the Minjiang fault zone, the West Qinling fault zone and the Longmenshan fault zone with strong earthquake of "5.12", the three major lithologic features are complicated, the geotectonics are complicated, and the internal and external dynamic geological processes are strong. After many earthquakes in the region, a large number of secondary geological disasters have been induced, resulting in the collapse, rockpile, landslide, debris flow and other adverse geological disasters along the railway line. Therefore, the risk assessment of geological hazards in the region and the scientific and efficient management of geological hazards in the region can provide strong support for the prevention and control of geological hazards and the informationization of railway comprehensive route selection. On the basis of field geological survey and data collection, according to the actual situation of Cheng-Lan railway geological disaster, this paper analyzes the influencing factors of earthquake secondary geological hazard. The evaluation indexes affecting the risk degree of secondary geological hazards of earthquake are selected synthetically, the weight of indexes is determined by AHP, and the matter-element model of hazard assessment of geological hazards is established by means of matter-element analysis principle. The risk assessment of typical work sites along Cheng-lan railway is completed, and the visual output of evaluation results is realized by using the image display function of GIS, which provides a reference for the comprehensive route selection of Cheng-lan railway. The paper also introduces the design and development process of the geological hazard information management system in the research area in detail. The system adopts the secondary development technology of GIS and the database technology to carry on the development work, and realizes the visualization display of the geological hazard information in the research area. The efficiency of geological hazard information management is improved by query and retrieval and comprehensive management.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;U212.22

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