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研究目的:无砟轨道施工控制测量技术,特别是其中的无砟轨道精调已成为无砟轨道建设的关键技术之一。无砟轨道精调时,在进行后方交会点的三维平差之前,需对参与后方交会的CPⅢ网点的稳定性进行检测,剔除点位发生变动的CPⅢ网点。如何进行CPⅢ网点的稳定性检测,研究CPⅢ网点的稳定性判断方法及其可行性并制定合理的判断标准,对确保无砟轨道的高精度铺设很有必要。研究结论:提出了利用前期CPⅢ平面和高程控制网平差后提供的资料,和无砟轨道精调时由全站仪自由设站实测数据计算的每2个CPⅢ网点间的实测距离和实测高差,与已知距离和已知高差比较,进行CPⅢ网点稳定性检测的方法,理论分析与试验结果证明,该方法是正确的和可行的,可在工程中推广应用。
Research purposes: The control technology of ballastless track construction control, especially the ballastless track fine tuning, has become one of the key technologies in ballastless track construction. Ballastless orbit fine tuning, before the three-dimensional adjustment of the rear intersection point, the need to participate in the rear intersection of the stability of the CPIII network testing, excluding the point of change CPIII outlets. How to carry out the stability test of CPⅢ network, to study the method of judging the stability of CPⅢ network and its feasibility and to formulate a reasonable judgment standard are very necessary to ensure the high-precision laying of the ballastless track. Research conclusions: Proposed the use of pre-CPIII plane and elevation control network to provide the information after the adjustment, and ballastless orbit adjustment from the total station free station measured data calculated every 2 CP Ⅲ network measured distance and measured high Difference, compared with the known distance and known height difference, to test the stability of CPⅢ network. The theoretical analysis and experimental results show that this method is correct and feasible and can be widely applied in engineering.