黄土地区生态护坡技术的研究

发布时间：2018-02-28 08:52

本文关键词： 黄土台塬区生态护坡数值模拟稳定性逡逑　出处：《西安科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：修建于黄土地区的土木工程,可能产生大量裸露的边坡,这些边坡难以依靠自然界的力量恢复植被。由于黄土具有CaC03含量高、垂直节理发育及遇水强度骤减等特性,使得边坡极易发生崩塌和滑坡等灾害,这些灾害给工农业生产及人民的生命安全带来了严重影响,边坡的治理工作越来越受到人们的重视。本文通过对关中黄土的特性、边坡破坏类型及特点的分析,研究了生态护坡机理及对边坡稳定的影响,取得以下成果:(1)根据护坡植物选择原则和植物群落配置原则,考虑地质水文、气候环境等自然条件与人文因素,配置出适应于关中黄土台塬各区的植物群落。(2)本文针对黄土边坡的特性,构建了 5大因素层12个评价指标的边坡稳定性评价系统及评价标准。(3)针对具体工程实例,利用本文所确定的边坡稳定性评价系统,结合yAHP软件求解各个指标的权重。评价出具体实际边坡处于不安全状态,需对边坡进行及时的处理。(4)采用生态护坡手段美化和加固边坡,通过GeoStudio软件分析生态护坡前的边坡与生态护坡后的边坡在降雨前、降雨中、降雨后三种工况下的渗流与稳定状态,得出经处理过的边坡在各个工况下均满足实际与规范要求。生态护坡能够防止水土流失,削弱雨水溅蚀;能够改善环境、恢复被破坏的生态环境、降低噪音、净化空气及调节小气候。生态护坡技术的推广与应用可以促进工程建设与生态建设的协调发展。
[Abstract]:Civil engineering built in loess area may produce a large number of exposed slopes, which are difficult to recover vegetation by the force of nature. Because loess has the characteristics of high CaC03 content, vertical joint development and sudden decrease of water intensity, etc. The slope is prone to collapse and landslide disasters, which have brought serious impact to industrial and agricultural production and the safety of people's lives. People pay more and more attention to the slope treatment work. This paper discusses the characteristics of loess in Guanzhong. Based on the analysis of slope failure types and characteristics, the mechanism of ecological slope protection and its influence on slope stability are studied. The following results are obtained: 1) according to the selection principle of slope protection plants and the principle of plant community allocation, geological hydrology is considered. Natural conditions and human factors, such as climate and environment, are applied to plant communities in various areas of Guanzhong Loess Plateau.) the characteristics of loess slope are discussed in this paper. The slope stability evaluation system and evaluation standard of 12 evaluation indexes of 5 factor layers are constructed. According to the concrete engineering examples, the slope stability evaluation system is established in this paper. Combined with yAHP software to calculate the weight of each index. It is evaluated that the actual slope is in unsafe condition, and the slope needs to be treated in time. (4) Ecological slope protection is used to beautify and reinforce the slope. The seepage and stability of the slope before and after ecological slope protection were analyzed by GeoStudio software under three conditions: before and after rainfall. It is concluded that the treated slope meets the practical and normative requirements under various working conditions. Ecological slope protection can prevent soil erosion, weaken Rain Water's splash erosion, improve the environment, restore the damaged ecological environment, and reduce noise. The promotion and application of ecological slope protection technology can promote the coordinated development of engineering construction and ecological construction.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：Q948;TU43

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