摘要
利用三维建模技术描述复杂的地质构造情况,结合工程地质信息可以直观,准确,动态,快速再现工程地质三维信息。本文根据地层数据信息用薄板样条插值法生成通过控制点的光滑曲面,再用二次曲线拟合算法生成多个二维剖面,用缝合算法连接二维剖面形成凸出的山包,最后通过求交算法生成复杂的三维地质模型。该方法是虚拟地形建模过程中的一个重要手段,在铁路隧道工程的虚拟开挖实际中取得良好效果,为决策隧道施工建设提供科学依据。
Three-dimensional modeling techniques to describe the use of complex geological structure, the combination of engineering geological information can be intuitive, accurate, dynamic, fast reproduction of three-dimensional engineering geological information. In this paper, based on stratigraphic data sheet, a smooth surface generates by means of spline interpolation , which is through the control points. Then quadratic curve fitting algorithm used to generate a number of two-dimensional profile and stitching algorithm used to connect two-dimensional profile of the formation of protruding hill-bag. Finally, through the intersection algorithm to generate three-dimensional geological model . The Virtual Terrain modeling is an important means and is used in a real tunnel excavation project and has achieved good results.
出处
《电子测试》
2009年第10期27-30,39,共5页
Electronic Test
关键词
薄板样条
二次曲线拟合
缝合算法
求交算法
thin-plate spline
second curve interpolation
Stitching algorithm
intersection algorithm
