Tapping method of Y-type steel anchor box cableway pipe of cable-stayed bridge

Abstract

The invention discloses a tapping method of a Y-type steel anchor box cableway pipe of a cable-stayed bridge, belonging to the construction technology of bridge steel structures and comprising the steps of: 1, determining a protective line of a center point of a ropeway pipe and a steel anchor box intersected on the steel anchor box, and determining the center point of an opening; 2, carrying out three-dimensional modeling by using a computer, penetrating by using a small-diameter steel pipe (the diameter is 100-300mm less than the diameter of the ropeway pipe) and the steel anchor box, making the penetrating and cutting data of the small-diameter steel pipe and the steel anchor box by using a penetrating line cutting software system; 3, cutting the penetrating line of the small-diameter steel pipe on a penetrating line cutting machine; 4, pot-welding and fixing the small-diameter steel pipe on the steel anchor box to ensure the accuracy of the center point; and 5, placing a magnetic cutter on the small-diameter steel pipe, and tapping around the steel pipe by the magnetic cutter.

Description

technical field [0001] The invention relates to a bridge building construction method, in particular to a method for opening a cableway pipe hole on a Y-shaped steel anchor box of a cable-stayed bridge. Background technique [0002] At present, most of the openings for cableway pipes of steel anchor boxes of cable-stayed bridges are opened before assembly, and CNC cutting machines are used to cut and open holes according to the process requirements, and then assembled; This method can basically guarantee the machining accuracy, meet the construction requirements and meet the needs of actual construction. Keep an angle, but angle control is extremely difficult (the thicker the plate, the more difficult it is to control), often cannot meet the required processing accuracy and position accuracy, so that the accuracy of the hole is reduced, or even scrapped below the process requirements; and for large cross-section plates The cutting machine cannot open the hole because the pl...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the openings for cableway pipes of steel anchor boxes of cable-stayed bridges are opened before assembly, and CNC cutting machines are used to cut and open holes according to the process requirements, and then assembled; This method can basically guarantee the machining accuracy, meet the construction requirements and meet the needs of actual construction. Keep an angle, but angle control is extremely difficult (the thicker the plate, the more difficult it is to control), often cannot meet the required processing accuracy and position accuracy, so that the accuracy of the hole is reduced, or even scrapped below the process requirements; and for large cross-section plates The upper hole is opened, and the cutting machine cannot open the hole because the plate is too large; resulting in slow processing, affecting the construction progress and increasing the construction cost

In addition, the traditional method of opening the cableway pipe of the steel anchor box is to open the hole before the steel anchor box is assembled. After the same, it will lead to the wrong opening position, which will lead to the wrong position of the cableway pipe, which will affect the processing quality of the steel anchor box

Finally, the CNC cutting machine used in the prior art is expensive in itself and the processing cost is high, which increases the construction cost to a certain extent