【作者】 樊珂奇；

【导师】 王念秦；

【作者基本信息】 西安科技大学 ， 地质工程， 2011， 硕士

【摘要】 黄土的工程特性对黄土地区的工程建设有着很大影响。随着近年我国黄土地区经济的快速增长、工程建设力度不断扩大、人类工程活动日益加剧,对黄土工程特性的研究具有重要理论意义和实际价值。以我国某铁路沿线的黄土及其高边坡为例,以现场调查、勘察及实验资料为基础,结合多学科的理论和方法,进行黄土工程特性及其高边坡稳定性研究,主要结论如下:1、对研究区黄土的工程特性(包括湿陷性、结构性、力学特性三大方面)以实验数据为基础,进行整理分析,提出“黄土工程特性指数”的概念。2、以“黄土工程特性指数”为基础,将沿线黄土分为工程特性良好、中等和较差三个级别,在mapgis平台上按照不同工程特性进行空间叠加分析,进行工程特性分区研究,得到其分布规律,并进行分区评价。3、对研究区黄土边坡进行分析,将沿线黄土边坡划分为新黄土边坡、老黄土边坡、新黄土+老黄土边坡和黄土+(砾石)+基岩四种边坡类系;总结影响边坡稳定性的敏感性因素为:降雨不均匀系数、坡度、坡体结构和坡高。同时,基于粗糙集理论,应用模糊综合评判法对研究区边坡进行稳定性评价。结果表明,黄土工程特性分区与黄土高边坡稳定性分布之间有着良好的关联性,对于实际工程建设具有一定的参考价值。更多还原

【Abstract】 Engineering properties of loess in the construction of loess areas have a significant impact. With the loess region rapid economic growth, construction efforts have been expanded, increasing human activities in recent years the engineering properties of loess has important theoretical and practical value.With the loess and loess slope of a railway along, for example, on-site investigation, survey and experimental data, combined with multi-disciplinary theories and methods, Study on the engineering properties of loess and slope stability studies, the main conclusions are as follows:1、On the engineering properties of loess in the study area (including collapsible, structural, and mechanical properties of the three major aspects) to experimental data, were analyzed with a proposed " index of engineering properties of loess " concept.2、With " index of engineering properties of loess " based on mapgis platform engineering properties according to different spatial overlay analysis, the engineering properties of regional studies is divided into good, moderate and poor three levels, get their distribution and partition the evaluation.3、The study area of loess slope divided into the new loess slope, the old loess slope, the new and old loess slope and loess + (gravel) +bedrock four kinds of slope classes system; summary of the sensitivity of slope stability factors: rainfall uniformity coefficient, slope, slope structure and slope height. Meanwhile, based on rough set theory, fuzzy comprehensive evaluation method in the study area slope stability evaluation. The results show that the engineering properties of loess slope stability Division and distribution of loess has a good correlation between, for the actual construction has some reference value.更多还原