摘要
研究目的:随着铁路建设标准的提高,无砟轨道铁路及高速铁路高程控制测量要求采用二等水准测量,而我国山区铁路多,地形困难,高差起伏大,用传统的几何水准测量方法不仅测量速度慢,而且精度不高。改进中间法三角高程测量代替山区二等水准测量具有受地形条件限制较小,传递高程迅速,工作效率高等优点,且能保证山区二等三角高程测量的准确性。研究结论:通过研究发现,改进中间法三角高程测量可有效地消除仪器高和棱镜高量取误差以及地球曲率、大气折光对三角高差测量精度的影响;测量精度可达到二等水准测量要求,而且该作业方法操作简单,能提高作业效率,可以推广应用。另外,在观测过程中,部分测量限差(如测回间垂直角指标差、指标差互差)有待今后多做试验来制定出更加合适的技术参数。
Research purposes： With the improvement of railway construction standards, the elevation control measurement of non - ballasted track railway and high - speed rail requires a second - order leveling. China＇s railways are mainly distributed in the mountains of difficult terrain conditions. In view of it＇ s difficulty to guarantee the accuracy of height by traditional spirit leveling in mountain area, this paper proposed a new method which named the middle way trigonometric leveling. Obviously, this method can pass elevation to with high working efficiency because of less restriction of terrain conditions. Research conclusions： Compared with the traditional trigonometric leveling method, the middle way trigonometric leveling method is innovative in field operating . The advantage of this method is that it can basically eliminate atmospheric refraction and earth curvature effects and can get results quickly without measuring instrument and prism heights. Because of its simpleness and efficiency, this method can be widely used to reach second - class standard of elevation measurement requirements. Additionally, to develop the more appropriate technical parameters for some measurement tolerance （such as vertical angle Index Error between observation sets and divergence of Index Error） ,we should do more testing and do more analysis of test results in the course of future measurement.
出处
《铁道工程学报》
EI
北大核心
2012年第6期15-19,23,共6页
Journal of Railway Engineering Society
关键词
二等水准测量
中间法三角高程测量
山区
误差
精度
second order leveling
middle method trigonometric leveling
mountain area
error
accuracy
