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针对目前以单点描述隧道断面变形的不足,本文采用B样条曲线拟合隧道断面扫描数据,计算待分析部位两期曲线段的豪斯多夫距离,以各部位曲线段的整体变形信息来反映断面变形。同时根据地铁隧道断面扫描数据的特点,提出了B样条曲线拟合的主点选取方法以及非断面信息的剔除方法。最后以某地铁隧道断面扫描数据为例,通过加入模拟变形信息拟合分析,验证了该方法的有效性。
Aiming at the shortcomings of describing the deformation of tunnel section with single point at present, B-spline curve is used to fit the tunnel section scanning data to calculate the Hausdorff distance of the two sections of the section to be analyzed. Based on the overall deformation information of the curve sections of each section Reflect the deformation of the section. At the same time, according to the characteristics of subway tunnel section scanning data, a method of selecting principal points of B-spline curve fitting and a method of eliminating non-section information are proposed. Finally, taking the scanning data of a section of metro tunnel as an example, the validity of this method is verified by adding the simulated deformation information fitting analysis.