Improving the methods of polar crane runway rail parameters during a geodesic control

Abstract

The purpose of this work is to show that using electronic flexible rulers, digital gradienters, electronic motometers and other special-purpose tools effectively solves the problem of automating the measuring process of polar crane runway rails geodesic parameters. It is recommended to use the special modifications for eliminating appreciable and systematic errors. The existence of radiation in the Atomic Power Station premises offers insights into the process of geodesic works. People can access the reactor building only when the reactor is not working. That's why the developed methods of geodesic measurements should provide the highest quality and reliability of obtained results, as well a partial or full measurements automation. The results of geodesic measurements are influenced by the air vibration, oscillation, and temperature drops between the floor and runwail rails levels [1–3]. During this, the contractor has to take the necessary measurements as fast as possible, which can decrease the quality and cause raw miscounts. There are a lot of methods for determining the planned-high-altitude positions of runway rail. The most famous among them are Ruskov [4, 5] and Burak methods.[6, 7]. According to the Burak method, the rail axis is marked as the middle of the surveying rod and the distances between the rail axis points are measured. According to the measurements, the radius of rail axis and the deviation of rail axis points from the radius are determined. However, this famous method is too time-consuming. It requires using 50m tape measures for measuring the distances between the rail points. It doesn't provide efficiency of measurements and further control of rail lining. Except this, you have to lift or drop the crane mechanisms to take the measurements. Deformations of runway rails may lead to the outage of works. The geometric runway rail parameters are checked in the first days of PPR, before starting the technological repair operations [7, 8]. The periodicity of defining the runway rail parameters depends on the conditions of its operation and reliability of under the crain constructions. In average, it is one cycle a year during the PPR according to the requirements in regulatory documents. That's why increasing the efficiency of geodesic checking of runway rails reliability by incorporating new methods and technologies is a significant task.