Method and device for measuring line shape of bridge deck

Abstract

The invention relates to the technical field of bridge construction, in particular to a method and device for measuring the line shape of a bridge deck. The method comprises the following steps of: in a set moving direction, obtaining space line shape initial measurement data under an estimated coordinate system through a total station instrument, and obtaining space line shape satellite data under a bridge independent coordinate system through a global positioning receiver; according to the space linear satellite data under the bridge independent coordinate system, correcting the space linear initial measurement data under the estimated coordinate system to be under the bridge independent coordinate system to obtain space linear correction data under the bridge independent coordinate system; and correcting the space line shape correction data under the bridge independent coordinate system to the bridge center line to obtain the bridge floor center line shape under the bridge independent coordinate system. The problem that in the prior art, a coordinate system needs to be established through a rear view point with known coordinates before a total station is adopted for measurement, and field factor limitation often does not have intervisibility conditions, so that measurement is difficult can be solved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method and a device for measuring the alignment of a bridge surface. Background technique [0002] In the long-span bridge construction process and regular inspection during the operation period, the alignment of the main girder is an important parameter of the bridge structure. When the traditional method is used to measure the alignment of the long-span main beam, multiple transfer stations are required, the efficiency is low, and the measurement time is too long, resulting in the measurement results including non-negligible structural temperature deformation. Therefore, a convenient, fast and accurate method for measuring the alignment of the main beam is needed method. [0003] The satellite navigation system dynamic real-time difference technology (GNSS-RTK) can perform dynamic measurement, and the elevation coordinate accuracy is ±15mm. However, there are the...

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Problems solved by technology

[0005] For the defects existing in the prior art, the object of the present invention is to provide a method and device for measuring the alignment of the bridge deck, which can solve the need to establish a coordinate system through the backsight point of known coordinates before using the total station measurement in the prior art, However, on-site factors often do not have the condition of visibility, which leads to the difficulty of measurement

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