地铁隧道椭圆度监测方法研究

Research on Monitoring Method of Subway Tunnel Ovality

地铁盾构隧道工程椭圆度监测是衡量隧道管片变形的重要指标之一。论文提出应用全站仪免棱镜测量方法进行隧道椭圆度监测方法,给出了隧道椭圆度监测流程,外业实施中利用高精度全站仪免棱镜扫描采集管片构件上的测量点位,在内业数据处理中则利用最小二乘原理中的最小平方中值法拟合椭圆。实验证明全站仪免棱镜测量方法及最小平方中值的椭圆拟合方法具有较高的可靠性及实用性。

The ellipticity monitoring of subway shield tunnel engineering is one of the important indicators to measure the deformation of tunnel segments.The paper proposes the application of total station without prism measurement method for tunnel ellipticity monitoring method,and gives the tunnel ellipticity monitoring process.In the field implementation,high-precision total station without prism is used to scan and collect the measurement points on the tube segment.In the internal data processing,the least square median method in the principle of least squares is used to fit the ellipse.Experiments prove that the total station measurement method without prism and the least square median ellipse fitting method have high reliability and practicability.