COMGIS在工程场地地震灾害风险预测中的应用

分析了传统的GIS技术在震害预测中的不足,提出了基于组件式GIS技术(COMGIS)的工程场地地震灾害风险评估系统的总体设计思路及设计方案;运用组件式GIS技术、数据库技术和空间分析技术构建信息管理平台,阐述了该系统的功能结构和数据流程;提出了工程场地地质资料的可视化查询和分析、地震影响场的生成、震害空间分析模型化等的实现思路与方法.研究表明:利用组件式GIS技术结合可视化编程语言所设计的工程场地地震灾害风险评估系统,能实现工程场地资料的有效利用,如地质剖面图的自动绘制、三维地质图的生成等;而且,能将震害分析模块化,集成到系统界面菜单上,实现震害分析的智能化,保证了系统开发的可持续性;同时,以场地液化、震陷、滑坡、场地类别作为场地地震灾害风险性预测的四大因子,在Mapx VB支持下进行叠合分析,编制出工程场地地震危险区综合预测图,可为场地规划和利用提供有效的基础资料.

Application of COMGIS to risk prediction of earthquake hazard of engineering site

Following an analysis of the disadvantages of traditional GIS method in prediction of earthquake hazard,a new method of COMGIS combined with other methods,as database technology and spatial analysis,is put forward to create a platform for managing information and making decision in order to improve the efficiency.The functions,the frame-work and data flow are fully discussed in this paper with an introduction of ideas and ways of visually inquiring the reconnaissance and survey data of engineering sites,the generation of earthquake influence field,modeling of earthquake hazard spatial analysis.The research shows that the risk evaluation system of earthquake hazard of engineering sites based on COMGIS and visual programming language can realize the effective utilization of information on sites,as drawing the geological section graph and 3D geological graph,and realize the intelligence of earthquake hazard analysis by the software of hazard analysis model,and the four factors considered to be important for evaluation of earthquake hazard of engineering sites are determined: sand liquefaction,earthquake-induced settlement,landslide,classification of engineering site.Under the support of Mapx+VB,the digital maps of four factors above mentioned are overlayed to accomplish zonation map of earthquake hazard of the engineering site.