Method for determining target pile number and target elevation of steel tube arch rib mounting control point

Abstract

The invention discloses a method for determining a target pile number and target elevation of a steel tube arch rib mounting control point, and belongs to the technical field of bridge building. The method comprises the following steps: 1) establishing a rectangular coordinate system; 2) selecting a plurality of reference points on the center line of the upper edge of an arch rib upper chord tube,and determining coordinates of each reference point; 3) calculating a reference pile number and reference elevation of each reference point; 4) calculating reference chord length between each reference point and an arch rib axis hinge; 6) calculating and measuring practically measured chord length between a control point and the arch rib axis hinge; 7) determining the maximum reference chord length smaller than the practically measured chord length and minimum reference chord length greater than the practically measured chord length; 8) searching the reference pile number which corresponds tothe reference chord length and reference elevation which corresponds to the reference chord length; and 9) calculating the target pile number and the target elevation. The method solves the problem that steel tube arch ring hoisting time is increased as a result of re-selecting points as the target pile number and the target elevation are difficult to determine after the measuring control point is regulated.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for determining a target stake number and a target elevation of a steel pipe arch rib installation control point. Background technique [0002] The main arch ring of a long-span concrete-filled steel tube arch bridge is usually constructed by cable hoisting, cable-stayed, buckle-hung method, which requires heavy hoisting weight and high installation accuracy. The installation and construction of the steel pipe arch ring needs to arrange the corresponding measurement control points on the steel pipe arch ring according to the position of the theoretical control points, and then stretch the measurement control points to their theoretical coordinate positions through the buckle cable. However, in the installation process of the steel pipe arch ring, the measurement control points are often blocked or destroyed, and the measurement control points need to be re-ar...

AI Technical Summary

Problems solved by technology

[0003] In view of the problems referred to above, the purpose of the present invention is to provide a method for determining the target pile number and target elevation of the steel pipe arch rib installation control point, and the method solves the technology that it is difficult to determine the target pile number and target elevation after the measurement control point is adjusted Defects, avoiding the problem of increased hoisting time of the steel pipe arch ring due to the re-selection of the total station, thereby reducing the safety risk during the construction process

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