怒江干流泸水段岸坡稳定性研究

发布时间：2018-03-13 11:19

本文选题：怒江泸水段　切入点：岸坡稳定性　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：泸水县位于云南省西部,隶属于怒江傈僳族自治州。整体上处于强烈碰撞、挤压的构造环境,境内山高坡陡,断层纵横交错,地质环境脆弱,地质灾害频发,危害严重。怒江干流从北至南纵穿泸水县,怒江岸坡是地质灾害高频发区;怒江两岸均有大量居民住户,怒江右岸建有S228、S230省道,且左岸有许多乡村公路,很容易遭受崩塌、滑坡、泥石流等地质灾害影响,从而威胁到人身安全。本文依托泸水县1:50000地质灾害详细调查项目,对怒江干流泸水段岸坡特征及稳定性分析评价作了研究。充分研究了区内人文自然地理、气象水文、地层岩性及人类经济工程活动等基础地质条件,初步分析了研究区内岸坡的结构类型、典型崩塌和滑坡的破坏机理、典型岸段的稳定性。通过GIS软件强大的空间分析功能,采用信息量法和层次分析法对怒江干流泸水段岸坡进行了稳定性分区研究。本文的所获得的主要认识和内容如下:(1)系统性的分析了研究区内的自然地理特征、气象水文特征、地形地貌等基础地质条件。通过对研究区岸坡结构类型的初步划分,对典型岸段进行了稳定性分析;对研究区内典型崩塌、滑坡的发育特征和形成机制进行了详细的分析。(2)通过对岸坡稳定性评价体系进行研究,分别阐述了信息量法和层次分析法的理论及评价方法。根据评价指标选取的相关原则,并结合野外调查的实际情况,确定了高程、坡度、坡向、工程地质岩组、构造缓冲区、河流作用、岸坡形态、气候和人类活动共九个因子作为研究区的评价指标。(3)分别建立研究区信息量法和层次分析法的评价模型,结合ArcGis软件的空间分析和属性计算功能,对怒江干流泸水段岸坡稳定性进行分区。通过对两种评价方法的结果分析可知,在稳定性不同区域的面积占比大致相同,但是在细化的区域岸坡稳定性存在差异。(4)将两种方法得到的稳定性分区图对比整合最终得到研究区的稳定性分区图。将研究区的稳定性整体上分为四个等级,并对研究区岸坡稳定性进行了分析。其中稳定性好的区域面积占比为16.60%,稳定性较好的区域面积占比为33.56%,稳定性较差的区域面积占比为21.59%,稳定性差的区域面积占比为28.24%.
[Abstract]:Lushui County is located in the west of Yunnan Province and belongs to Nujiang Lisu Autonomous Prefecture. On the whole, it is in a strong collision, squeezed tectonic environment, steep mountains and steep slopes, crisscross faults, fragile geological environment, and frequent geological disasters. The main stream of the Nujiang River runs longitudinally through Lushui County from the north to the south, and the bank slope of the Nujiang River is a high-frequency geological disaster area. There are a large number of residents on both sides of the Nujiang River, and the right bank of the Nujiang River has a S228-S230 provincial road, and there are many rural roads on the left bank, which are vulnerable to collapse. Landslide, debris flow and other geological disasters have affected people, thus threatening their personal safety. This paper relies on the detailed investigation project of 1: 50000 geological hazards in Lushui County. The slope characteristics and stability analysis and evaluation of Lushui section of the main stream of the Nujiang River are studied. The basic geological conditions such as human natural geography, meteorology and hydrology, stratigraphic lithology and human economic engineering activities are fully studied. The structure type of bank slope, the failure mechanism of typical collapse and landslide, the stability of typical shore section are analyzed preliminarily. Through the powerful spatial analysis function of GIS software, Using the method of information quantity and analytic hierarchy process, the stability of bank slope of Lushui section of the main stream of Nujiang River is studied. The main knowledge and contents obtained in this paper are as follows: (1) the characteristics of natural geography and meteorology and hydrology in the study area are analyzed systematically. Basic geological conditions such as topography and geomorphology. Through the preliminary classification of slope structure types in the study area, the stability of the typical shore segment is analyzed, and the typical collapse in the study area is analyzed. The development characteristics and formation mechanism of landslide are analyzed in detail. (2) by studying the evaluation system of slope stability, the theory and evaluation method of information quantity method and analytic hierarchy process are expounded respectively. Combined with the actual situation of field investigation, the elevation, slope, slope direction, engineering geological rock formation, tectonic buffer zone, river action, bank slope shape are determined. Nine factors of climate and human activities are taken as the evaluation index of the study area. (3) the evaluation models of the information quantity method and the analytic hierarchy process in the study area are established, and the spatial analysis and attribute calculation functions of the ArcGis software are combined. The slope stability of Lushui section of the main stream of Nujiang River is zoned. By analyzing the results of two evaluation methods, it can be seen that the proportion of area in different areas of stability is roughly the same. However, there is a difference in slope stability between the two methods. Finally, the stability zoning map of the study area is obtained. The stability of the studied area can be divided into four levels as a whole. The stability of the bank slope in the study area is analyzed. The proportion of the area with good stability is 16.60, the area with good stability is 33.566,the area with poor stability is 21.59and the area with poor stability is 28.24B. the proportion of the area with good stability is 16.60, the area with good stability is 33.56, the area with poor stability is 21.59 and the area with poor stability is 28.24.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642.2

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