Measurement and installation method of plate-type ballastless track primary standard

Abstract

The invention discloses a measurement and installation method of a plate-type ballastless track primary standard, comprising the following steps of preparing job, preliminarily locating and measuring a primary standard, anchoring the primary standard, carrying out three dimensional coordinate measurement on the primary standard, adjusting the primary standard, carrying out plane re-check measurement and smoothness check on the primary standard, carrying out altitude re-check measurement on the primary standard and sealing the primary standard. The method has small measurement transfer error, high precision, few intermediate job links of the measurement, high work efficiency, material saving and simple, convenient and rapid operation.

Description

Technical field [0001] The invention relates to a method for measuring and installing a ballastless track datum, in particular to a measuring and installing method for a CRTS I plate type ballastless track datum. Background technique [0002] With the advent of my country’s high-speed railway construction climax, the traditional ballast track has reached the limit of its carrying capacity under the long-term load of high-speed trains. The track smoothness has deteriorated, the amount of maintenance operations has increased, and the available maintenance time has become more and more. Less, seriously hindering the development of high-speed railway. [0003] At present, the domestic railway passenger dedicated lines basically adopt ballastless tracks. There are two main forms of ballastless tracks: double-block ballastless track and slab ballastless track. Slab ballastless track is mainly classified into CRTS I slab ballastless track and CRTS II slab ballastless track. CRTS I type s...

AI Technical Summary

Problems solved by technology

[0013] The defect of this method is: 1, adopt the bolt anchoring process, need to drill on the groove, use the bolt to anchor the reference device, the cost is high

2. Obtain the elevation coordinates of the datum device by leveling and auxiliary points on the top surface of the convex block; obtain the plane coordinates of the datum device by using the wire measurement method; use the angle measurement of theodolite and the positive vector measurement of the tension line to check the smoothness of the datum device; In this way, there are too many measurement links and measurement transmissions, which increases the error, complicates the installation process, and reduces work efficiency.

[0015] The main defects of this method are: 1. The steel plate is embedded in advance and has no fine-tuning function; 2. The elevation and plane position of the steel plate are measured by wire, and the measurement accuracy is not high

[0016] At present, there is no measurement and installation method of a plate-type ballastless track datum that can successfully overcome the defects in the above-mentioned methods.

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