Three-dimensional numerical control method for bridge section precasting technology

Abstract

The invention discloses a three-dimensional numerical control method for a bridge section precasting technology, which comprises the following steps: dividing the bridge into sections; calculating the global coordinates of the section boundary control point and the geometric dimensions of each section; inputting the axial compression value and camber of the sections, correcting the global coordinates of the section boundary control point, and calculating new coordinates; calculating the three-dimensional coordinate transition matrix of any point of the adjacent sections; calculating manufacturing errors of the sections and adjustment quantities of the adjacent sections in six directions; calculating the three-dimensional coordinate transition matrix of any point of the adjacent sections after considering the section manufacturing errors; judging whether the beam surface is twisted according to the manufacturing errors of the sections; and according to the three-dimensional coordinate transition matrix of any point of the adjacent sections after considering the section manufacturing errors, outputting the theoretical calculation values of the matching coordinates of the initial section locating point, and the theoretical calculation values of the section dimensions. The invention realizes three-dimensional control on the geometric line shapes of the bridge sections, and reduces the manufacturing errors caused by the separate control on plane and facade line shapes.

Description

technical field [0001] The invention relates to the segmental prefabrication technology of the bridge short-line method, in particular to a three-dimensional numerical control method for the segmental prefabrication technology of the bridge. Background technique [0002] The segmental prefabrication technology of the short-line method is to divide the bridge superstructure into several short segments, and after converting the overall coordinates of the bridge into consideration of factors such as concrete shrinkage, creep and pre-camber, into the local coordinates of the prefabrication factory, the fixed formwork of the prefabricated mechanical equipment The construction process of span-by-span matching and flow prefabricated bridge segments in the system is an interactive operation between the user and the program. The program requires the user to input the coordinates and geometric dimensions of the bridge after manufacture as input values, which are used to calculate the c...

AI Technical Summary

Problems solved by technology

[0003] At present, the algorithm of segmental prefabrication control technology software is to control the planar alignment and elevation alignment respectively, adopt the coordinate plane transformation to control the geometric alignment, and adopt the two-dimensional correction method to adjust the segmental prefabrication error. Large calculation errors are likely to occur under the linear conditions of slopes or large curves, so that the construction accuracy and project quality cannot be guaranteed

In addition, the current above-mentioned algorithm has the following disadvantages: 1. It can only realize the control of segmental manufacturing and construction, but fails to realize the integration of design, manufacturing and erection control; 2. It does not set measurement data and judgment of linear error and alarm mechanism, it is difficult to judge and control the human error of on-site measurement; 3. The remote database access function is not set, and the real-time update of the database cannot be realized

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