Comparison And Analysis Of Railway Track Control Survey Method

Our country has entered the high-speed railway construction period.Due to high-speed trains has high running speed,the smoothness of the high-speed rail higher requirements were put forward to ensure the train running stability and passenger comfort.The smoothness of the orbit is determined by the geometry of the track,including the gauge,the level,the curve,etc.In the process of construction,the geometry of the orbit is controlled by means of precise measurement technology and measurement.Pile control network is also called CP? control network,including the plane control network and elevation control network.In the process of high-speed railway construction,the CP? control network has important role for the laying of track.The selection of measurement method and precision of observation data of CP ?control network will directly affect the results of ballastless track laying.In this paper,through the differernt measuring methods,the complexity of the field work,measuring instruments and equipment requirements,complexity of data processing in the industry and the precision of the measurement results of CP ? compares and analyses the five aspects of control network is a reasonable choice of CP ? control network measurement method.Based on the orbit of "three nets" measurement system,discuss the CP III control network layout and observation scheme;In this paper,wire control survey control coordinate calculate pile was carried out,and the method and precision of the wire layout were explored.At the same time,the resection method is applied to the CP? control point measurement,research for resection observation method,and use the adjustment software for calculating coordinates;On the basis of meet the minimum baseline length,using GPS static control survey,lay control points measured network,and using the calculating of adjustment software,analyze measurement accuracy;And the wire control measure,resection method and GPS coordinates calculating results were comparative analysis.According to different engineering environment,best CP? plane control network for measuring method was put forward.