基于GIS技术的四川地区红层泥岩路用性研究
发布时间：2018-09-12 08:31
【摘要】：近年来,为响应国家号召,西部大开发如火如荼。四川地区如铁路、公路等基础设施建设不断开展,大面积的红层泥岩区是工程勘察及设计过程中必须要面对的一个难题。众所周知,四川地区红层泥岩广泛分布,主要形成于侏罗系和白垩系,具有较差的物理力学性能。然而,稳定的行车环境与优良的路基填料是息息相关的,科学合理的对四川地区红层泥岩进行评价和工程利用,一方面不仅节约大量的工程资金、减少填料换填,另一方面也很大程度的保护了当地山区的地质环境。开展四川地区红层泥岩路用性研究是十分有意义的。基于已有的学术研究成果对四川地区红层泥岩物理力学相关性指标进行搜集、筛选及整理,依托地理信息系统(GIS)理论,在ArcGIS10.1软件平台上创建四川地区红层泥岩路用性评价因子数据库。专家分析法结合同行给各评价因子赋值,制作评价因子GIS图件。通过AHP法构造判别矩阵,为各评价因子赋予权重,并进行了一致性检验。在红层泥岩的路用性评价中,借助GIS在数据存储、处理分析、计算及统计等多方面的强大功能对各评价因子图件进行权重叠加分析,通过对图件的多层次操作,绘制了四川地区红层泥岩路用性评价图并结合图件进行了路用性的评价说明。本文对四川地区红层泥岩进行分区,划为盆北西南区、盆中区、盆东区及攀西区四个大区。分析红层泥岩的物质成分,进行红层研究区工程环境特征的讨论,说明了红层泥岩较差的物理力学性能。在ArcGIS10.1软件平台得出的路用性评价图件的基础上,划分了研究区及各分区内红层泥岩的路用性等级程度及其在区位上的分布。此外,统计分析了研究区及各分区不同路用性程度的区域面积及比重。最后,以交通需求性为背景,通过分析研究区及分区现有交通及未来规划交通线里程,提出了“贡献率”概念,进一步说明四川地区红层泥岩路用性评价结果具有较好的工程应用价值。该研究结论不仅对四川地区公路、铁路建设中路基填料的选用上有一定的指导意义,对类似红层泥岩地区在工程建设上也提供一定的理论依据。
[Abstract]:In recent years, in response to the call of the country, the development of the western region is in full swing. In Sichuan area, such as railway, highway and other infrastructure construction, a large area of red mudstone area is a difficult problem that must be faced in the process of engineering investigation and design. It is well known that red mudstone is widely distributed in Sichuan area, mainly formed in Jurassic and Cretaceous, and has poor physical and mechanical properties. However, the stable driving environment is closely related to the fine subgrade filling. On the one hand, the evaluation and engineering utilization of red layer mudstone in Sichuan is scientific and reasonable. On the one hand, it not only saves a lot of engineering funds, but also reduces the filling replacement. On the other hand, it also protects the geological environment of the local mountainous area to a great extent. It is of great significance to study the road use of red mudstone in Sichuan area. Based on the existing academic research results, the physical and mechanical correlation indexes of red mudstone in Sichuan area are collected, screened and sorted out, and based on the (GIS) theory of geographic information system, A database of evaluation factors for road use of red mudstone in Sichuan is established on the platform of ArcGIS10.1. Expert analysis method combined with peers to assign value to each evaluation factor, make evaluation factor GIS map. The discriminant matrix is constructed by AHP method, and the weight of each evaluation factor is given, and the consistency test is carried out. In the evaluation of road performance of red mudstone, with the help of the powerful functions of GIS in data storage, processing and analysis, calculation and statistics, the weight superposition analysis of each evaluation factor map is carried out, and the multi-level operation of the map is carried out. The evaluation map of road performance of red layer mudstone in Sichuan area is drawn and the evaluation explanation of road performance is given in combination with the map. In this paper, red mudstone in Sichuan area is divided into four regions: southwest of basin north, middle of basin, east of basin and Panxi area. The material composition of red mudstone is analyzed and the engineering environmental characteristics of red bed study area are discussed. The poor physical and mechanical properties of red bed mudstone are explained. On the basis of the evaluation map of road performance obtained by ArcGIS10.1 software platform, the paper divides the grade of road performance of red mudstone in the study area and each district and its distribution in location. In addition, the area and proportion of different road use degree were analyzed statistically. Finally, taking the traffic demand as the background, the paper puts forward the concept of "contribution rate" by analyzing the existing traffic and future planning of traffic line mileage in the research area and district. It is further explained that the evaluation results of road use of red mudstone in Sichuan area have good engineering application value. The conclusion not only has certain guiding significance for the selection of subgrade filler in highway and railway construction in Sichuan area, but also provides certain theoretical basis for engineering construction in areas similar to red mudstone.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P208;U414
[Abstract]:In recent years, in response to the call of the country, the development of the western region is in full swing. In Sichuan area, such as railway, highway and other infrastructure construction, a large area of red mudstone area is a difficult problem that must be faced in the process of engineering investigation and design. It is well known that red mudstone is widely distributed in Sichuan area, mainly formed in Jurassic and Cretaceous, and has poor physical and mechanical properties. However, the stable driving environment is closely related to the fine subgrade filling. On the one hand, the evaluation and engineering utilization of red layer mudstone in Sichuan is scientific and reasonable. On the one hand, it not only saves a lot of engineering funds, but also reduces the filling replacement. On the other hand, it also protects the geological environment of the local mountainous area to a great extent. It is of great significance to study the road use of red mudstone in Sichuan area. Based on the existing academic research results, the physical and mechanical correlation indexes of red mudstone in Sichuan area are collected, screened and sorted out, and based on the (GIS) theory of geographic information system, A database of evaluation factors for road use of red mudstone in Sichuan is established on the platform of ArcGIS10.1. Expert analysis method combined with peers to assign value to each evaluation factor, make evaluation factor GIS map. The discriminant matrix is constructed by AHP method, and the weight of each evaluation factor is given, and the consistency test is carried out. In the evaluation of road performance of red mudstone, with the help of the powerful functions of GIS in data storage, processing and analysis, calculation and statistics, the weight superposition analysis of each evaluation factor map is carried out, and the multi-level operation of the map is carried out. The evaluation map of road performance of red layer mudstone in Sichuan area is drawn and the evaluation explanation of road performance is given in combination with the map. In this paper, red mudstone in Sichuan area is divided into four regions: southwest of basin north, middle of basin, east of basin and Panxi area. The material composition of red mudstone is analyzed and the engineering environmental characteristics of red bed study area are discussed. The poor physical and mechanical properties of red bed mudstone are explained. On the basis of the evaluation map of road performance obtained by ArcGIS10.1 software platform, the paper divides the grade of road performance of red mudstone in the study area and each district and its distribution in location. In addition, the area and proportion of different road use degree were analyzed statistically. Finally, taking the traffic demand as the background, the paper puts forward the concept of "contribution rate" by analyzing the existing traffic and future planning of traffic line mileage in the research area and district. It is further explained that the evaluation results of road use of red mudstone in Sichuan area have good engineering application value. The conclusion not only has certain guiding significance for the selection of subgrade filler in highway and railway construction in Sichuan area, but also provides certain theoretical basis for engineering construction in areas similar to red mudstone.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P208;U414
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