新疆天山公路地质灾害危险性评价研究

发布时间：2018-01-08 19:17

本文关键词：新疆天山公路地质灾害危险性评价研究　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：国道G217是连接新疆南北的主要国防公路,担当新疆“二纵三横”主要公路中的一部分,但公路两侧的地质灾害频发,使该国道无法保持正常通行,降低了公路通车量和使用性,进而严重影响了新疆的经济发展和沿线居民的生命财产安全。本文基于国内外公路区域地质灾害的相关研究成果,结合天山地区的自然地理环境及工程地质条件,分析了天山公路地质灾害发育的影响因素和分布特征,综合应用层次分析法、模糊综合评价法及BP神经网络法对天山公路地质灾害的现状和特点进行了分析,取得如下研究成果:(1)构建天山公路地质灾害危险性评价指标体系:分析天山地区的自然地理环境和地质环境,总结天山公路沿线地质灾害的影响因素和分布特征,最终选取了12个影响天山公路地质灾害危险性的主要评价指标,即地质构造(u1)、地层岩性(u2)、地貌类型(u3)、坡角(u4,°)、坡高(u5,m)、植被覆盖率(u6,%)、年均降雨量(u7,mm)、日最高气温(u8,℃)、降雨强度(u9,mm/10min)、地震烈度(u10,度)、路基位置(u11)、路面拔河高度(u12,m),并采用专家系统法对每个评价指标进行赋值。(2)总结天山公路地质灾害的发育特征:分析天山公路沿线地质灾害的类型、分布特征及分布规律,通过天山公路沿线地质灾害的发育特征进行了详细分析,研究影响天山公路地质灾害形成的内、外动力地质作用。根据所收集的相关资料,采用GIS技术、CAD软件等软件相结合,编制了天山公路12个地质灾害危险性评价指标的危险性分布图。(3)天山公路地质灾害危险性评价:综合应用层次分析法、模糊综合评价法及BP神经网络法,建立了天山公路地质灾害危险性评价模型,揭示了天山公路地质灾害危险性分布规律,其中低危险公路段306km,占天山公路全长的57.1%;中危险公路段25km,占天山公路全长的4.7%;高危险公路段67km,占天山公路全长的12.5%;极高危险公路段138km,占天山公路全长的25.7%;所得结果与实际情况相符,由此可见,天山公路地质灾害整体危险性较高,在相关工程中应加强重视。
[Abstract]:G217 is the main national defense highway connecting the north and south of Xinjiang, Xinjiang as part of the "two vertical and three horizontal" main road, but the road on both sides of the frequent geological disasters, the state cannot maintain normal traffic, reduce the traffic volume and the use of, and seriously affected the economic development of Xinjiang and the safety of the residents along the line life and property. In this paper, the domestic and foreign related research results of regional geological hazards based on highway, combined with the natural geographic environment and engineering geological conditions in the Tianshan area, analyzes the influence factors of Tianshan highway geological disaster development and distribution, comprehensive application of the analytic hierarchy process, the status and characteristics of fuzzy comprehensive evaluation method and BP neural network method for geological disaster in Tianshan Mountains the road was analyzed. The research results are as follows: (1) construction of the Tianshan highway geological hazard evaluation system: analysis of natural geography in Tianshan area The environment and geological environment, summarizes the geological disasters along the Tianshan Highway factors and distribution characteristics, the final selection of 12 main evaluation index of Tianshan Highway geo hazard, namely geological structure (U1), lithology, landform (U2) (U3), slope angle (U4 degrees), high slope (U5, m), vegetation coverage rate (U6%), the average annual rainfall (U7, mm), the daily maximum temperature (U8 DEG C), rainfall intensity (u9, mm/10min), seismic intensity (U10 degrees), the position (U11), pavement height (U12, m) the tug of war, and by using the expert system method is assigned to each index. (2) summarizes the development characteristics of geological disaster in Tianshan Highway: type analysis of geological disasters along the Tianshan highway, distribution characteristics and distribution, are analyzed in detail through the development characteristics of geological disasters along the Tianshan highway, study on the influence of geological disasters in the formation of Tianshan highway, external power according to the geological effect. Related data sets, using GIS technology, CAD software and other software combined with the developed risk distribution map of Tianshan Highway 12 geological hazard evaluation. (3) the risk of highway geological disaster evaluation: the comprehensive application of the analytic hierarchy process, fuzzy comprehensive evaluation method and BP neural network method, establishes the evaluation the risk of Tianshan highway geological disaster model, reveals the Tianshan Highway geo hazard distribution, the low risk highway 306km, accounting for 57.1% of the total length of the Tianshan highway; dangerous section of highway 25km, accounting for 4.7% of the total length of the Tianshan highway; high risk highway 67km, accounting for 12.5% of the total length of the Tianshan highway; high risk highway 138km, accounted for 25.7% of the full length of the Tianshan highway; consistent with the actual situation, the result shows, overall higher risk of highway geological disasters in the Tianshan Mountains, related projects should be enhanced.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U412

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