公路工程平曲线测量方法优选

Selection of Horizontal Curve Measurement Methods in Highway Engineering

公路建设时有经过高山、峡谷、河流、森林等地形条件,公路弯道经过此类障碍时,单一平曲线放样方法往往会出现不通视、虚交点、双交点等特殊情况。介绍了目前常用的4种平曲线测量放样方法的测量原理,分析了4种测量放样方法的现场应用情况。结果表明,通过多种测量方法的综合应用,可以有效地解决测设过程遇障碍的问题,置镜交点的极坐标放样法、长弦偏角法等各点独立测设的方法精度准确,测设效率高。

Some complex terrain conditions such as mountains, valleys, rivers, forests and so on will be usually encountered in highway construction, and when the highway bends through thess obstacles, some special circumstances such as not visibility, imaginary intersection point and double intersection will be occurred using single horizontal curve lofting method. The measurement principles of 4 kinds of horizontal curve measurement lofting methods commonly used are introduced, and their field application is analyzed. It is shown that the special circumstances occurring in highway construction can be effectively solved by the comprehensive application of several horizontal curve measurement lofting methods, and that the methods for the independent measurement and setting-up of each point such as polar coordinates lofting, long string angle method and so on have high accuracy and high measurement and setting-up efficiency.