基于GPR试验数据和CATIA的三维地质建模

3D geological modeling based on GPR data and CATIA

地质雷达(GPR)在水利水电工程地质勘探中得到了越来越广泛的使用,并且目前地质雷达勘探产生的地质解释图多被处理为二维图片.以湖南某工程坝址处5个剖面的地质雷达二维地质解释图为基础资料,使用Visual Basic语言以及三维建模软件CATIA的逆向工程模块,建立了研究区的三维地质模型,并实现了地质模型的数字钻孔与切片.首先用Visual Basic语言编程提取CAD地质解释图中的有用信息,然后将信息输入CATIA,使用CATIA中Part Design、GSD、DSE、QSR等工作台,建立研究区的三维地质模型,最后在GSD工作台中实现三维地质模型的数字钻孔与切片.数字切片与原地质解释图的对比显示,基于CATIA的三维地质建模与实际情况较为相符,CATIA在水利水电工程的三维可视化以及全过程的协同设计方面将有广阔的应用前景.

Ground prospecting radars（GPRs）have been more and more widely used in geological prospecting of water resources and hydropower projects.It produces a great number of geological interpretation pictures after working,and currently the pictures are processed into 2D image in most instances.In this paper,Visual Basic language programing and the reverse engineering module of CATIA are used to found the 3D geological model of the study area based on the GPR geological interpretation pictures of five sections of a dam project in Hunan province.Firstly,Visual Basic language is used to fetch valid information from the CAD geological interpretation pictures.Then,the information are input to CATIA,and the workbenches of CATIA,such as Part Design,GSD,DSE,QSR,etc.,are used to found the 3D geological model.At last,GSD workbench are used to show the digital drillings and slicings of the 3D geological model.The comparison between digital slicing and the original geological interpretation map shows that the 3D geological modeling based in CATIA confirms to the actual situation.CATIA has broad application prospects in water resources and hydropower projects on 3D geological modeling and the whole process of collaborative design.