A Method of Increasing Observation Between Free Stations of Railway Track Control Network

Abstract

The invention discloses a method for increasing the observation amount between free measurement stations of a railway track control network. The method includes the following steps that 1, measurementstations are arranged at intervals between left and right lines in the directions of the lines, and each measurement station uses n pairs of CPIII points of the left and right lines and the adjacentmeasurement stations as measurement targets; 2, the coordinates of the CP III points are calculated by using a non-directional angle traverse method, the lengths of three sides of an intersection triangle, the horizontal angle gamma at the measurement station, and the horizontal angle beta at the adjacent measurement station are obtained according to the measurement data in the step (1); 3, the horizontal angle gamma is checked. The observation amount between the measurement station and the adjacent measurement stations is increased, the horizontal angle is obtained through the tree sides of each different intersection triangle, the corresponding horizontal angle observation amount is checked, the gross error detection and positioning of the observation amount (side length and horizontal angle) are facilitated and the point position accuracy of the control network is improved obviously.

Description

technical field [0001] The invention relates to the field of railway or long tunnel construction, in particular to a railway track control network for increasing observations between free measuring stations. Background technique [0002] In order to meet the requirements of high-speed railway for high ride comfort, the line must have accurate geometric parameters. The construction process of ballastless track is complicated, and CPⅢ planar control network is generally used to meet the measurement accuracy requirements of ballastless track. The CPⅢ control network is a three-dimensional construction control network to control the construction of ballastless track. Its plane control network is a corner network of a free measuring station, which starts and closes on the upper level control network (CPⅠ) or (CPⅡ); the upper level control network The dot spacing of the dots is 800-1000m. CPⅢ network control points are arranged symmetrically on both sides of the line, the distan...

AI Technical Summary

Problems solved by technology

However, the existing technology has the following defects: due to the special corner intersection of free stations, there is no direct connection between free stations, and the commonly used polar coordinate method and front intersection method are not suitable for the coordinates of CPⅢ plane control points Calculation leads to complex coordinate calculation; the intersection angle of CPⅢ is only 7.5°~9°, 157°~165°, which obviously exceeds the requirement of "should not be greater than 100° or not less than 30°", resulting in poor graphic strength and point error Larger; graphics check conditions include poor closure of horizontal common sides (such as CP05-CP07) and poor closure of vertical common sides (such as CP05-CP06), resulting in only side length conditions and single graphics check conditions, making it difficult to find gross errors in angles

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