一种既有线偏差约束精测网建网方法

摘要

针对我国既有线铁路进行绝对位置控制，参照高速铁路CPIII自由设站边角交会网，提出一种既有线偏差约束精测网作为既有线绝对位置的控制基准。并对这种控制网的布网方案、测量方法、相邻测站间坐标转换搭接，以及测量过程中存在的问题进行详细分析论述。这种精测网采用单边控制网，建网简单、成本低，且可在V形天窗期进行测量；测量采用全站仪直接测量，测量效率高。研究结果表明，这种既有线偏差约束精测网可以作为一种新型轨道控制网在既有线铁路控制绝对位置中得到广泛应用。%With the control of existing railway line in China for absolute position and the reference to high-speed rail CPIII with free-station linear-angular Intersection, this article puts forward a precise line deviation control surveying network to maintain absolute position of existing railway line. And detailed discuss on the net program, the measuring method, the coordinate transformation between adjacent station lap and the analysis of existing problems are conducted. This network, using unilateral control network, is easy to be established with low cost, and it can be used in v-shaped skylight period. It employs total station instrument for direct measurement with high efficiency. The results show that the precise deviation constrain surveying network can be extensively used as a new type of track control network for absolute position control of the existing railway line.