Accurate positioning method for segmental hoisting of steel towers in 3D space based on 2D alignment

Abstract

The invention discloses a three-dimensional space steel tower segmental hoisting accurate positioning method based on a two-dimensional line shape. The three-dimensional space steel tower segmental hoisting accurate positioning method based on the two-dimensional line shape comprises the following steps of projecting a steel tower according to a front elevation and a horizontal plane according toa steel tower construction design drawing before the segmental hoisting of the steel tower so as to obtain an elevation two-dimensional line shape and a horizontal plane two-dimensional line shape; importing line shape elements of the two line shapes of the elevation two-dimensional line shape and the horizontal plane two-dimensional line shape into a total station instrument so as to realize using planes to replace bodies, using lines to replace planes and using points to replace lines; randomly dotting and measuring a top plate and a bottom plate of the steel tower by using a non-prism measuring mode of the total station instrument as tower body mileage and elevation positioning in the steel tower segmental hoisting positioning process; and then randomly dotting and measuring a side plate of the steel tower as tower body offset distance positioning so as to finish steel tower segmental rapid positioning. According to the three-dimensional space steel tower segmental hoisting accuratepositioning method based on the two-dimensional line shape, the steel tower with a curved surface structure is simply, rapidly and efficiently positioned.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a three-dimensional space steel tower hoisting and precise positioning method based on two-dimensional alignment. Background technique [0002] Nowadays, the steel tower bridge is popular with the public for its novel and flexible structure, and its beautiful shape and good load-bearing and force-transmitting performance are all borne by the space steel tower. The linear accuracy of the steel tower will directly affect the force of the bridge. Therefore, it is particularly important to ensure the construction accuracy of steel tower hoisting and positioning. [0003] At present, the conventional steel tower hoisting positioning method is to find the coordinates of a specific point on the design drawings, and according to the relative position of the point to the edge of the steel tower, use a tape measure to set the point on the steel tower and stick a reflective shee...

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Problems solved by technology

[0003] At present, the conventional steel tower hoisting positioning method is to find the coordinates of a specific point on the design drawings, and according to the relative position of the point to the edge of the steel tower, use a tape measure to set the point on the steel tower and stick a reflective sheet here When the steel tower is hoisted, the specific point is used as the basis for positioning. This positioning method is inefficient and has a large error. At the same time, it will not be effective for the recheck measurement of the steel tower position. Especially for curved surface structural steel towers, use a tape measure It is more difficult to guarantee its linear accuracy requirements

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