基于GIS的地层剖面图形生成技术

为了清楚地展现地下岩体结构，如裂隙、节理、层理、断层等不连续的结构面，在Visual Basic 6．0平台下对建立在OCX技术基础上的GIS（地理信息系统）功能组件MapObjects进行了集成二次开发，把三维数据结构边界表示法和三维栅格结构有机的结合，以三维栅格结构为主体，力求以最小的数据量表示更为真实的地下结构。改进后的三维栅格结构法实现了对区域平面地质图图层的放大、缩小、漫游以及地下剖面生成，并可以把生成剖面以多种格式输出以进行稳定性分析，成功应用该系统对四川省紫坪铺水利枢纽工程水库两岸重点库段进行了地质建模，有效地指导了该地区的滑坡治理和213国道的改线工程。

Technique of generating stratigraphic section based on GIS

In order to clearly define the underground rock mass structure, such as discontinuous construction face, including fracture, joint, layer and fault, on the platform of Visual Basic 6.0, the second development towards GIS function group parts-MapObjects, on the base of OCX technique was made; and boundary denotation of three-dimension data structure and three-dimension grid structure was harmoniously connected. Three-dimension grid structure as main, we attempt to denote real underground construction in less data. Improved method of three-dimension grip structure realize enlargement, reduction, browse to geological map layer in local plane and formation of underground section as well as multi-format input for analysis of stabilization. By successful utilization of the system, geological model of significant reservoir section in two sides of Zipingpu Key Water-control Project in Sichuan Province was created, which effectively guides landslide disposal and project of changing line in the district; moreover, successful reservation of reservoir is guaranteed.