摘要
本文采用B样条曲线拟合地铁隧道断面,并选用自由曲线之间的Hausdorff距离作为度量,定义隧道断面的形状变化。介绍了隧道断面的B样条曲线拟合算法,自由曲线之间Hausdorff距离的计算方法。最后以某地铁区间隧道断面受损及修复后的扫描数据为例,采用B样条曲线拟合,并计算其断面Hausdorff距离分析变化,为隧道维护和使用提供了依据。
In order to obtain the deformation of tunnel section, the scanning data of tunnel section is fitted by a B-spline curve. And the Hausdorff distance between two free section curves is selected to define the deformation. The algorithms of fitting the section curve and achieving the Hausdorff distance between two free curves are introduced in this paper. Finally, this method is used to analysis the deformation of a damaged tunnel section. It is proved to be useful to guide the tunnel maintenance.
出处
《工程勘察》
2014年第1期62-65,82,共5页
Geotechnical Investigation & Surveying
基金
现代城市测绘国家测绘地理信息局重点实验室开放课题资助项目(20111201W)
