陕北黄土地区公路边坡灾害危险性分区研究
发布时间：2019-06-11 00:48
【摘要】：陕北黄土高原地区，黄土分布广且湿陷性较强，汛期的短历时强降雨常常引发公路边坡灾害的发生，造成巨大的经济损失并对社会造成不良影响。结合陕北公路边坡的实际状况，对公路边坡灾害进行灾害危险性分区研究，深入地了解了陕北黄土地区边坡灾害的地域特征，揭示了灾害规律，旨在为陕北的路网规划、设计、养护和灾害防治提供一定的依据。 在分析总结国内外对灾害危险性分区研究的基础上，通过实地调查，结合陕北黄土地区的地质环境概况和外动力环境概况，依据区域公路边坡灾害的类型和特点，从岩土体特性、地形地貌因素、诱发因素和植被因素四方面考虑，依照指标选取原则选取分区指标。 指标选取过程中充分考虑与陕北公路边坡实际情况相结合，利用陕西省公路日常养护巡查系统μ，获取公路危险边坡高度和危险边坡点密度两个指标数据，另选取岩土体类型、地面坡度、地表切割密度、降雨量≥25mm的日数和植被覆盖度共七个指标构建区域公路边坡灾害危险性评价指标体系。依据基于物元的层次分析法，确定各分区指标的权重，利用ArcGIS10.0的空间分析功能，生成各指标图层，依照分区模型叠加得到《陕北公路边坡灾害危险度图》。 将陕北分为3个一级危险区：轻度、中度、危险；其中中度危险区又细分为2个亚区。依据陕北公路边坡灾害危险性分区，结合陕北干线路网，分段进行道路危险性评价，并针对性的提出防治措施。
[Abstract]:In the Loess Plateau of northern Shaanxi, loess is widely distributed and collapsible. Short duration heavy rainfall in flood season often leads to highway slope disasters, resulting in huge economic losses and adverse effects on society. Combined with the actual situation of the highway slope in northern Shaanxi, this paper studies the disaster risk zoning of the highway slope disaster, deeply understands the regional characteristics of the slope disaster in the loess area of northern Shaanxi, reveals the disaster law, and aims at planning and designing the road network in northern Shaanxi. Maintenance and disaster prevention and control provide a certain basis. On the basis of analyzing and summarizing the research on disaster risk zoning at home and abroad, through field investigation, combined with the general situation of geological environment and external dynamic environment in loess area of northern Shaanxi, according to the types and characteristics of regional highway slope disasters, According to the principle of index selection, the zoning index is selected from four aspects: rock and soil characteristics, topographic and geomorphological factors, inducing factors and vegetation factors. In the process of index selection, combined with the actual situation of Shaanxi highway slope, the data of highway dangerous slope height and dangerous slope point density are obtained by using Shaanxi highway daily maintenance and inspection system 渭, and the type of rock and soil is selected. There are seven indexes of ground slope, surface cutting density, rainfall 鈮，
本文编号：2496868
[Abstract]:In the Loess Plateau of northern Shaanxi, loess is widely distributed and collapsible. Short duration heavy rainfall in flood season often leads to highway slope disasters, resulting in huge economic losses and adverse effects on society. Combined with the actual situation of the highway slope in northern Shaanxi, this paper studies the disaster risk zoning of the highway slope disaster, deeply understands the regional characteristics of the slope disaster in the loess area of northern Shaanxi, reveals the disaster law, and aims at planning and designing the road network in northern Shaanxi. Maintenance and disaster prevention and control provide a certain basis. On the basis of analyzing and summarizing the research on disaster risk zoning at home and abroad, through field investigation, combined with the general situation of geological environment and external dynamic environment in loess area of northern Shaanxi, according to the types and characteristics of regional highway slope disasters, According to the principle of index selection, the zoning index is selected from four aspects: rock and soil characteristics, topographic and geomorphological factors, inducing factors and vegetation factors. In the process of index selection, combined with the actual situation of Shaanxi highway slope, the data of highway dangerous slope height and dangerous slope point density are obtained by using Shaanxi highway daily maintenance and inspection system 渭, and the type of rock and soil is selected. There are seven indexes of ground slope, surface cutting density, rainfall 鈮，
本文编号：2496868
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