中间法三角高程测量在高铁CPⅢ控制网中的应用

Application of Middle Method Trigonometric Leveling Measurement in the Transmitting CPⅢ Elevation Control Network

在高铁桥梁CPⅢ高程控制网的建立中,使用几何水准测量的方法从地面高程控制点直接向桥面传递高程往往受到限制。本文依据精密三角高程测量的原理,通过大量实验并加以分析论证,提出在高差一定时,竖直角与边长(h,S)大小的最佳匹配对应关系,能够获得最佳联测结果。并依据实际情况,文中还指出了提高中间法高程测量精度的具体措施及相关注意事项,对实际工作具有重要指导意义。

In the current establishment of CPIII elevation control network on high-speed railway bridges, transmitting of height using the standard method of geometric measuring faces restrictions. On principle of precise triangle elevation measurement, anti after large number of experiments and analysises, the optimal correspondenee between vertical angle and range length at a certain height is put forward and validated. Also the specific measures and notes to improve the accuracy of middle method leveling measurement are pointed out, which is significant to field work.