安康市地震小区划工程地质分区研究

发布时间：2018-03-24 06:13

本文选题：安康　切入点：定量　出处：《西北大学》2017年硕士论文

【摘要】：本次安康市工程地质分区研究以笔者参与的安康市地震小区划项目为切入点,在项目开展过程中,进行了针对性的地质调查和资料搜集,并开展了钻探和剪切波速测试等现场工作,对安康市的区域构造状况、地貌成因类型、岩土类型及其工程性质、水文地质条件等进行了深入分析。在此基础上,结合“区内相似,区际相异”原则,以地形地貌、地层岩性、填土厚度、岩土体类型和水文地质情况等作为主要分区依据,对安康市进行了定性的工程地质三级分区。一级分区按地貌及其成因形态进行分区,共分为河流冲积平原、台地、低山;二级分区按堆积物的成因类型、岩性等进行分区,划分到亚区,洪湖积台地工程地质区根据土层结构、岩土体类型及工程性质的不同,并结合形成时间分为三个亚区,即一级台地、二级台地、三级台地;河流冲洪积平原由于各条河流的形成先后顺序不同,可按照河流的名称分别划分到亚区,即汉江冲洪积平原、黄洋河冲洪积平原、月河冲洪积平原、傅家河冲洪积平原、冉家河冲洪积平原。三级分区根据土体结构的相似性,划分到段,共16个段。在工程地质定性分区基础上,选取分段相对繁琐的河流冲积平原区,以河流冲积平原分区中划分的12个工程地质段为基础,以场地浅部岩土条件和工程地质特性的相似性为主要分区依据,采用数据挖掘中的聚类方法和模糊综合评判方法,对河流冲积平原区进行精细化的定量分区,分别划分为抗震有利、抗震良好、抗震一般、抗震不利四个亚区。对两种分区方法所得结果进行对比分析,仅黄洋河三级阶地的划分存在分歧,结合黄洋河三级阶地的浅部岩土条件和工程地质特性将分区结果进行统一,最后将黄洋河三级阶地划分为抗震一般区,完成河流冲积平原的定量分区。本次工程地质分区研究,在工程地质定性分区的基础上,对调查和勘探数据进行深入挖掘,创新性地完成了河流冲积平原区的精细化定量分区,对工程地质定性分区结果进行了良好的完善和补充,采用定性与定量相结合的方式对安康市2020年规划范围内的区域进行科学合理的工程地质分区,为安康市的城市规划与建设提供了有意义的指导。
[Abstract]:In this study of engineering geology zoning of Ankang City, the author participated in the project of seismic microzonation in Ankang City as the starting point. During the process of the project, the geological survey and data collection were carried out. Field work such as drilling and shear wave velocity testing has been carried out, and the regional tectonic conditions, landform genetic types, geotechnical types and their engineering properties, hydrogeological conditions, etc., of Ankang City have been thoroughly analyzed. Combined with the principle of "similarity in the area and difference between regions", the main zoning basis is terrain and geomorphology, stratigraphic lithology, thickness of fill soil, types of rock and soil and hydrogeological conditions, etc. The third grade division of engineering geology in Ankang city was carried out qualitatively. The first division was divided into river alluvial plain, platform and low mountain according to the geomorphology and its genetic form, and the second division was divided according to the genetic type and lithology of the deposit. According to the different soil structure, rock and soil types and engineering properties, the Honghu Lake platform engineering geological area can be divided into three sub-regions according to the formation time, that is, the first stage, the second stage and the third stage. The river alluvial plain can be divided into subareas according to the name of the river, that is, the Hanjiang alluvial plain, the Huangyang river alluvial plain, the lunar river alluvial plain and the Fu Jia river alluvial plain. According to the similarity of soil structure, the third grade zoning is divided into 16 sections, which are divided into 16 sections. On the basis of the qualitative zoning of engineering geology, the river alluvial plain area with relatively tedious segmentation is selected. Based on 12 engineering geological sections divided in river alluvial plain and the similarity of shallow geotechnical conditions and engineering geological characteristics of the site, the clustering method and fuzzy comprehensive evaluation method in data mining are adopted. The river alluvial plain area is divided into four sub-areas of favorable earthquake resistance, good earthquake resistance, general earthquake resistance and unfavorable earthquake resistance. The results obtained by the two zoning methods are compared and analyzed. Only the division of the three terraces of the Huangyang River is divided into different areas. Combined with the shallow geotechnical conditions and the engineering geological characteristics of the third terrace of the Yellow River, the zoning results are unified. Finally, the third terrace of the Yellow River is divided into general seismic areas. On the basis of the qualitative zoning of engineering geology, the investigation and exploration data are deeply excavated, and the fine and quantitative division of river alluvial plain area is innovatively completed. The qualitative zoning results of engineering geology are well improved and supplemented, and the scientific and reasonable engineering geological zoning is carried out in the planning scope of Ankang City in 2020 by combining qualitative and quantitative methods. It provides meaningful guidance for urban planning and construction of Ankang City.
【学位授予单位】：西北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642

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