利用GPS-RIK技术进行既有线曲线整正测量研究

既有线曲线整正测量是铁路既有线提速改造和工务部门大修设计的主要任务之一。需要改造的既有铁路一般均为繁忙干线，并行车密度较高。传统的测量方法是将测量仪器安置在线路上，这样不仅在作业过程中受行车干扰，作业效率也不够高，而曲线地段通视条件差，作业难度是相当大的。同时，作业人员的安全问题也变得十分突出。笔者提出采用先进的GPS-RIK技术，对既有线曲线整正进行测量。采用该技术不仅能克服气候条件的限制，而且能以较高的频率，较高的精度测定互不通视的各被测点的坐标，克服了传统的作业方法要求置镜点与被测点之间必须通视、作业受天气影响、存在误差累积、内业计算工作量大等缺陷。该法在保证作业人员安全的前提下大大提高作业效率。

Application of GPS-RTK Technique to Adjust the Existing Railway Garves

Adjusting the existing railway curves is one of the primary tasks of the reconstruction for train speed-up and the maintenance sections. The railway that needs reconstruction is usually busy line. In traditional field survey, the instrument is set on the curvilinear track, on the one hand the running trains will disturb the survey; the visibility is rather poor and efficiency is rather low. On the other hand, the surveyors are under risky working conditions causing potential traffic accidents. Now GPS-RTK technique is introduced to adjust the existing railway curves. Compared with the conventional approaches, the use of GPS-RTK technique in railway curve adjustment has many advantages. It could not only overcome the limitation due to climate, but also could determine the coordinates between points of poor visibility with high frequency and high precision. It is efficient and feasible as well as ensures surveyors' safe operation.