采用全站仪中间法三角高程在确保观测精度、适当改正施测方法的条件下,高差测量精度可达类二等水准测量的要求。目前正在兴建的哈大客运专线,箱梁顶面距地面近10m高度,箱梁顶面高程控制点定位精度±1mm,采用精密水准测量是很难施测的,此种观测条件下拟定了中间法三角高程施测。 Triangle elevation using total station middle method to ensure that the observation accuracy, proper correction of the method of measurement conditions, the height measurement accuracy up to second-class level measurement requirements. At present, Harbin-Dalian Passenger Dedicated Line is under construction. The top of the box girder is nearly 10m above the ground and the positioning accuracy of the elevation control point on the top of the box girder is ± 1mm. It is very difficult to measure with precision leveling. Under these observation conditions, France triangle elevation test.