Method for construction of measurement and pavement of GRP (ground reference point) of ballastless track reference network

Abstract

The invention discloses a method for construction of measurement and pavement of a GRP (ground reference point) of a ballastless track reference network, which belongs to the technical field of construction of ballastless tracks of high-speed railways and solves the problems of long GRP measurement and pavement time and failure to guarantee precision. A high-precision robot type electronic total station and a high-precision electronic level are utilized and combined with an automatic GRP plane data acquisition software, the triangulateration network is measured and paved for the known CPIII (control panel III) and the unknown GRP according to the pavement principle of the triangulateration network, the data are recorded into a balancing software so as to obtain the coordinate of the GRP, altitude of the GRP is measured by the means of back vision-intermediate vision-front vision and by the known second-class level point. The method includes the following steps of setting out the GRP, mounting a locating cone and burying the GRP; measuring and paving the GRP planarly, balancing the GRP plane, measuring the altitude of the GRP and balancing the altitude of the GRP. By the method for construction of measurement and pavement of the GRP of the ballastless track reference network, cost is saved and work efficiency is improved. Besides, the method has evident social and economical benefits, is high in applicability, reliable in operation and easy to master.

Description

technical field [0001] The invention belongs to the technical field of ballastless track construction for high-speed railways, and relates to a construction method for GRP measurement and construction of a ballastless track track reference network. Background technique [0002] Before the construction of CRTSII type slabs for ballastless tracks of high-speed railways, the three-dimensional coordinates of GRP (encrypted base standard) need to be measured first. The track reference network GRP (commonly referred to as CP4 in China) is based on the track control network CPIII. It provides a control network for the laying and fine adjustment of track slabs. It is a further encryption of the CPIII pile foundation control network, and Provides a control reference for track plate fine-tuning. The GRP reference network has the following characteristics: GRP points are arranged along the axis of the track, which is similar to a straight line; the left and right lines are arranged se...

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Problems solved by technology

[0003] The present invention aims to solve the problems of the existing GRP surveying and setting time, and the accuracy is difficult to guarantee, and provides a ballastless track track reference network GRP surveying and construction method, making full use of the robot-type total station and reasonable data collection and data adjustment Software, in the case of relatively less construction investment, quickly and accurately conduct GRP testing

[0004] In order to solve the problems of slow speed and difficult accuracy of traditional GRP survey and design, a high-precision robotic total station and a high-precision electronic level are used, combined with the automatic acquisition software of GRP datum point plane data, and the known The CPIII and unknown GRP points are used to measure and set the corner network, and the data are included in the adjustment software to obtain the coordinates of the GRP points. Using the second-level known points, the GRP points are measured by the method of backsight-middle sight-foresight the elevation

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