提出了一种适应于地铁隧道的三维激光点云建模及变形分析方法。该方法根据盾构隧道断面呈椭圆形状的特点,基于阿基米德螺线极径对螺线形状的控制作用,对隧道断面进行局部插值构建隧道模型,并根据模型点分析隧道的变形情况。使用C#编写了建模程序,并通过实例验证了该方法的有效性。 A three-dimensional laser point cloud modeling and deformation analysis method suitable for subway tunnels is proposed. Based on the elliptical shape of shield tunnel section, this method is based on the control effect of Archimedes spiral pole diameter on helical shape. The tunnel section is partially interpolated to construct the tunnel model, and the tunnel deformation is analyzed according to model points. Using C # to write a modeling program, and verify the effectiveness of the method through examples.