精密三角高程代替二等水准实现跨河水准测量的研究与应用

本文对精密三角高程测量的理论与方法、误差来源及精度指标进行了分析研究，探讨了其代替二等水准进行跨河水准测量的可行性及关键问题，提出了采用两台高精度自动照准全站仪对向观测进行跨河水准测量的具体操作方法及要求，并在重庆轨道交通环线建设中进行了多次应用，证明了精密三角高程测量在一定条件下能够满足二等水准测量的精度要求，具有较高的经济效益。

Research and application of precise trigonometric leveling to replace second-class leveling achieving river-crossing leveling

This paper analyses the theory and method, error source, and precision indexes of Precise Trigonometric Leveling. It discusses the key problems of using Precise Trigonometric Leveling instead of Second-Class Leveling in River-Crossing Leveling, and furnishes operating methods and requirements which employ two High-Precision automatic collimating total stations to carry out River-Crossing Leveling in opposite observational directions. Applications of the method in the construction of Chongqing Rail Transit Loop Line were conducted, proving that the Precision Trigonometric Leveling can meet the accuracy requirements of Second-Class Leveling under certain conditions, and it also brings high economic benefits.