Method for matching and cutting closure section of basket arch with hexagonal section

Abstract

The invention relates to a matching and cutting method for a closure section of a basket arch with a hexagonal section, which relates to the technical field of bridges and comprises the following steps of: establishing an actual measurement coordinate system by taking a bridge center point as an original point and a bridge center line as a Z axis, and establishing a virtual coordinate system by taking a section center line of an arch rib as a Z axis; according to the structural data of the arch rib, obtaining an arch axis, two arch crown curves located on a top plate, two arch bottom curves located on a bottom plate and coordinates of the arch crown lines in an actual measurement coordinate system; the coordinates of the arch crown curve, the arch bottom curve, the arch axis and the arch crown line are converted into coordinates in a virtual coordinate system, the coordinates of a plurality of closure gap measuring points preset on the arch crown curve and the arch bottom curve in the virtual coordinate system are combined, the arc distance from each closure gap measuring point to the arch crown line is obtained through processing, and then matching and cutting amount data are obtained. According to the method, coordinate conversion is applied, three-dimensional space calculation involved in closure is converted into two-dimensional plane calculation, the accuracy of the matching and cutting amount can be ensured, and the matching and cutting efficiency can be improved.

Description

technical field [0001] The application relates to the field of bridge construction control, in particular to a method for matching and cutting a hexagonal cross-section basket, arch, and dragon section. Background technique [0002] Arch bridges are widely used in long-span bridges and have various forms. Among them, the basket arch structure with hexagonal cross-section is beautiful in shape. In the application of landscape bridges, its uniqueness is obvious. [0003] Each arch rib of the hexagonal cross-section basket arch is composed of multiple segments, and the multiple segments are sequentially connected along the direction of the arch axis. The segments include the top plate, inner upper web, inner lower web, bottom plate, outer lower web, and outer upper web connected end to end in sequence, and the inner upper web, inner lower web, outer lower web, and outer upper web are all for the curved plate. The junction of the inner upper web and the inner lower web constit...

AI Technical Summary

Problems solved by technology

[0007] (2) The web of the arch rib is tailor-welded from inclined upper and lower curved plates, and it is impossible to arrange measuring points. Considering the coupling relationship between the top and bottom bevel angles and the inner and outer bevel angles, the matching cut amount of the web plate is calculated. It increases the difficulty of matching and cutting the web and requires higher precision

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