Experimental research and application of rapid measurement method of CP Ⅲ plane network on main beam of five-tower continuous cable-stayed bridge based on GNSS
Experimental research and application of rapid measurement method of CP Ⅲ plane network on main beam of five-tower continuous cable-stayed bridge based on GNSS
The long continuous beam of the long-span bridge will produce large longitudinal and vertical displacement with the change of temperature,resulting in the multi-value of the CP Ⅲ coordinates on the continuous beam bridge,and the station accuracy cannot meet the relevant accuracy requirements of the high-speed railway track plate measurement.This paper proposes a new method for rapid measurement of CP Ⅲ point plane coordinates on continuous beams based on GNSS static measurement,and a practical measurement experiment is designed based on the Changqing Yellow River Bridge of Zhengzhou-Jinan high-speed Railway to verify the feasibility of the new method.The experimental results show that this method for rapid measurement of CP Ⅲ point plane coordinates based on GNSS.In the case of observation duration of 30 min,it can meet the requirements of CP Ⅲ planar network measurement accuracy in the construction of base plate and track plate.
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