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本文一开始指出以往高等级交通路线缓圆曲线定位存在的问题,阐述测地线的密切概念和密切特征及其基本条件,说明测地线密切特征对高等级交通路线缓圆曲线密切特征的启示,分析在高等级交通路线运行的车辆逐渐转向运行的密切特征和缓圆曲线组合定位的密切特征。在此基础上,介绍以密切特征理论研究产生的高等级交通路线缓圆曲线定位的二个弧长方程及其解法,指出密切和相切的特征区别,说明密切点是缓圆曲线正确组合定位的依据;指出切点和曲线相切不符合密切特征,以切点的曲线组合不利于高等级交通路线曲线安全定位设计和车辆曲线安全运行。最后,总结测地线密切理论应用研究的四点结论。
In the beginning of this paper, the author pointed out the existing problems of the domestication of meridian curves in high-grade transport routes, described the close and close characteristics of geodetic lines and their basic conditions, and the enlightenment of close features of geodesic on the close characteristics of metrology curves of high-level transport routes , Analyzes the close characteristics of the gradual turning operation of the vehicles running on the high-grade traffic routes and the close features of the combined positioning of the slow curve. On this basis, two arc-length equations and their solutions to the slow-round curve locating of high-class traffic routes that are generated by the close feature theory are introduced. The differences between the close and the tangent features are pointed out. The close point is the correct combination of the slow circle curve It is pointed out that the tangency between the tangent point and the tangent curve is not close to the close feature and the combination of tangent point curve is not conducive to the safe positioning design of curvilinear high-grade traffic route and the safe operation of the vehicle curve. Finally, summarize the four conclusions of the application of ground-truth theory.