Method for laying CP III control points on railway cable-stayed bridge and railway cable-stayed bridge

Abstract

The invention provides a method for laying CP III control points on a railway cable-stayed bridge and the railway cable-stayed bridge. The laying method comprises the following steps that the CP III control points are laid on a main beam on the inner side of a cable tower of the cable-stayed bridge; the CP III control points are laid in the midspan of the main beam of the cable-stayed bridge; theCP III control points are symmetrically laid on the main beam between the cable tower and the midspan at intervals relative to the midspan. According to the laying method, the CP III control points are laid on the railway cable-stayed bridge, on the basis that the index requirements of the spacing specification are met, the variation and the variation rule of the characteristic part of the main beam can be accurately reflected, and relative stability can be achieved; the laid CP III control points are easy to protect and convenient to construct.

Description

technical field [0001] The invention relates to the technical field of railway precision measurement, in particular to a method for laying out CPIII control points on a railway cable-stayed bridge and the railway cable-stayed bridge. Background technique [0002] In the process of high-speed railway construction, track control points (CPⅢ control points) need to be arranged on both sides of the upper track of the railway, which are used as the benchmark for laying track slabs. When crossing special terrains such as rivers, some railway bridges are designed as cable-stayed bridges with long-span steel-concrete composite girders. Such long-span cable-stayed bridges with steel-concrete composite girders are generally semi-floating systems. The main girders of the whole bridge are constantly changing in the horizontal, vertical, and longitudinal directions due to the influence of sunlight, temperature, and wind. It is constantly changing in plan and elevation, where the deforma...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method for laying out CPⅢ control points on a railway cable-stayed bridge and a railway cable-stayed bridge, so as to solve the technical problem in the prior art that the CPⅢ control points are constantly changing and cause the change situation and the change mode of the points to be difficult to predict.

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