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传统的城市电缆隧道变形监测方法易受到监测点数量、观测时间、劳动强度、观测条件等多方面因素的制约,且属于单点式监测模式,无法对隧道整体变形趋势进行有效监测。针对上述问题,根据矩形城市电缆隧道的特点,结合三维激光扫描技术,本文提出一种新的基于正交整体最小二乘平面拟合的城市电缆隧道变形监测方法,通过计算拟合平面之间夹角及距离的变化,进行隧道净空水平位移及拱顶下沉趋势的分析。实例结果表明,该方法具有较高的可行性。
Traditional urban cable tunnel deformation monitoring methods are subject to many factors, such as the number of monitoring points, observation time, labor intensity, observation conditions, etc., and they belong to the single-point monitoring mode, which can not effectively monitor the overall deformation trend of the tunnel. In view of the above problems, according to the characteristics of rectangular urban cable tunnel and 3D laser scanning technology, this paper presents a new monitoring method of urban cable tunnel deformation based on orthogonal whole least squares plane fitting, Angle and distance changes, the tunnel clearance and horizontal displacement of the vault settlement trend analysis. The results show that this method is more feasible.