Two-point hoisting method for specially-shaped prefabricated part

Abstract

The invention discloses a two-point hoisting method for a specially-shaped prefabricated part. The two-point hoisting method comprises the following steps of: 1) constructing a model of the part by using finite element software, and determining coordinates of a gravity center of the part; 2) drawing a plurality of straight lines which pass through the gravity center and have two intersections with the part, wherein a set of intersections of the straight lines and the part is used as a region from which hoisting points for the part can be selected; 3) selecting one of the straight lines, wherein the two intersections of the straight line and the part must be on two sides of the gravity center and at positions where the part has relatively high bearing capacity and the part is most rational in stress if hoisted with the two intersections as hoisting points; and then taking the two intersections as hoisting point positions for the part; 4) drawing a perpendicular line passing through the gravity center, taking a hoisting hook point position on the perpendicular line, wherein the included angle formed by the connecting line of the hoisting hook point and each of the two hoisting points and the horizontal plane must be more than 45 degree; and 5) making a hoisting rope based on the selected hoisting hook point positions and hoisting point positions, and sequentially connecting the hoisting rope with the two hoisting points and the hoisting hook points to hang the part up.

Description

technical field [0001] The invention relates to a component hoisting method, in particular to a two-point hoisting method of a special-shaped prefabricated component. Background technique [0002] For components with regular shapes, as long as the lifting points are set symmetrically, two lifting ropes of equal length can be selected. However, if this method is still used for special-shaped components, the components must be inclined after being hoisted, which will cause damage to the components during hoisting and landing. In order to keep the component level after hoisting, it is common practice to use 3 to 4 slings, and the length of 4 slings needs to be adjusted. The general method is to replace at least 3 of the 4 suspension ropes with manual rewinding chains. After the components are hoisted, adjust the level of the components by adjusting the manual rewinding chains; and manual winding. The disadvantage of these methods is that the components are still uneven at th...

AI Technical Summary

Problems solved by technology

The disadvantage of these methods is that the components are still uneven at the moment of lifting, and they will still be damaged; at the same time, it is difficult to adjust so that all the ropes bear the same force. In the most extreme case, three of them are stressed and one is not, which is also a kind of damage to the components.

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