基于三维GIS的第四系古河道沉积区工程建设适宜性评价研究

基于皖北楚店集、高炉集、江集和望町集4幅1∶5万综合地质调查成果，划定区内第四系地质结构与工程地质分层，控制茆塘期古河道的空间展布特征，融合多源数据与专家经验联合构建三维地质结构模型。综合考虑基础、工程、水文等地质条件，运用Delphi法确定了9项工程建设相关评价因子。基于AHP层次分析法、多因子综合指数评价法建立了评价指标体系与计算模型。通过三维GIS分析评价方法，综合评价区内50m以浅工程建设适宜性，分级圈定了适宜性好、较好、一般等各级区域。利用皮尔逊相关系数法对评价结果和单项因子进行关联分析，揭示了因子影响关系，提出了工程建设过程中需重点关注的因素。

Research on 3D GIS-Based Suitability Evaluation of Engineering Construction of the Quaternary Paleo-channel Sedimentary Area

Based on the 1:50 000 comprehensive geological survey in Chudianji, Gaoluji, Jiangji and Wangdingji of northern Anhui Province,this paper determines the Quaternary geological structure,the engineering geological stratification, and the spatial distribution characteristics of maotang paleo-channel. It also builds a 3D geological structure model on the basis of multi-source data and experts'experience. Considering the geological conditions of foundation, engineering and hydrology, nine evaluation factors related to engineering construction are used in the Delphi method. Based on AHP and multi factor comprehensive index evaluation method, the evaluation index system and calculation model are established. 3D GIS analysis and evaluation method are used to comprehensively evaluate the suitability of shallow engineering construction within 50 meters in the area, and delineated different levels of suitability. Pearson correlation coefficient method is used to analyze the correlation between the evaluation results and individual factors, revealing the influence relationship of factors in the process of engineering construction.