【摘要】 地铁隧道长区间自动监测部分测站存在无法获取稳定基准点的问题。本文拟采用自由测站边角交会网的模式来解决该问题。选用徕卡360°棱镜作为公共连接点照准目标,建立多测站的动态基准网。在对徕卡360°棱镜不同入射方向的测角、测距精度进行测试的基础上,建立了基准网的实时动态解算模型并进行精度分析。最后通过某工程实例验证了该方法精度和可用性。更多还原

【Abstract】 Obtaining the stable datum is problematic when deformation monitoring of underground is taken in a long region. In this paper,the free station marginal intersection net is used to deal with the problem.The Leica 360° prisms are selected to be the targets of common points. Then a dynamic datum with multistation is established. The accuracy analysis for the dynamic datum is presented based on the oblique incident tests for angle and distance measurement. At last,the accuracy and usability are verified by a practical engineering case.更多还原