Four-point positioning and installation method of steel box girder segment

Abstract

The invention discloses a four-point locating and installing method of steel box beam sections. The four-point locating and installing method comprises the following steps of dividing and numbering sections of a steel box beam box body, and marking section lines; obtaining four intersection points by inwards shifting the section lines, wherein the four intersection points are measuring and locating points; calculating the standard height of each measuring and locating point and theoretical values of location coordinates; manufacturing all steel box beam sections, marking the positions of the measuring and locating points on each steel box beam section, and marking numbers; measuring the standard height of the four measuring and locating points and actual values of the location coordinates of each steel box beam section after the hoisting of each steel box beam section is completed, comparing the actual values with the theoretical values, adjusting the position of the steel box beam section until the actual values and the theoretical values are the same if the actual values and the theoretical values are not the same, and completing the hoisting and locating work of the steel box beam section if the actual values and the theoretical values are the same. According to the four-point locating and installing method disclosed by the invention, the accuracy of the hoisting position of each steel box beam section is ensured, the hoisting accuracy of the whole steel box beam box body is increased, and the hoisting efficiency is increased.

Description

technical field [0001] The invention specifically relates to a four-point positioning installation method for steel box girder segments. Background technique [0002] With the development of urban traffic, the construction of viaducts is becoming more and more difficult. The intersections and road sections with large traffic volume in the city are all in the form of steel structure box girders. The construction process of the steel box girder is as follows: the integral steel box girder is divided into segments. Generally, the steel box girder segment is a standard quadrilateral row, and the arc segment is a non-standard quadrilateral. The steel box girder segments are cut, assembled and welded in the factory, and finally the steel box girder segments are consigned to the construction site for hoisting, positioning and welding. During the hoisting process of steel box girder segments, the installation and positioning accuracy is one of the key points of construction monitor...

AI Technical Summary

Problems solved by technology

However, the traditional steel box girder measurement and positioning only needs to locate the middle steel box girder segment according to the centerline of the road, and the rest of the adjacent steel box girder segments adjust their positions according to the size of the joint to determine their positioning , the artificial factors of this method are relatively large, and the existing errors are also relatively large.

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