一种基于自由设站法连续传递附合至地铁隧道平面控制点的方法

针对轨道交通工程铺轨控制基标测量要求高、难度大、效率低等特点,提出一种类似于地面高铁布设CPⅢ控制网进行施测的方法,即基于自由设站法连续传递附合至地下平面控制点的方法。介绍了该方法的原理及其精度评定。并以某地铁工程为例,阐述了该方法在盾构隧道中的应用。结果表明,该方法可在一定条件下替代铺轨控制基标进行施工测量。

A Method that Closing to the Control Point of Plane in Continuous Passing in the Subway Tunnel Based Free Station

The paper put forward a method which setting control network that similar to the CPⅢ of ground high-speed rail to measure for the characteristics of measure of track-laying control standard in rail transit projects are high demand,huge difficult,low efficiency,etc. And the Method is closing to the plane control points of underground in contin-uous passing based free station. It introduces the principle and precision evaluation of the method. Also,it taking a sub-way project as an example,described the application of the method in shield tunnel. Results show that the method can be instead of track-laying control standard for construction survey in certain conditions.