Manual correction device for cantilever steel beam and construction method thereof

Abstract

The invention discloses a manual correction device for a cantilever steel beam and a construction method. The manual correction device comprises a supporting mechanism and a traction mechanism. The supporting mechanism comprises a supporting frame, a z-direction jack and a plug. The supporting frame is fixed with the plug through the z-direction jack, an x-direction jack and a y-direction jack areinstalled in the plug, x-direction idler wheels for supporting the cantilever end of the cantilever steel beam are rotatably installed on a bracket of the x-direction jack, and y-direction idler wheels for supporting the cantilever end of the cantilever steel beam are rotatably installed on a bracket of the y-direction jack. The traction mechanism comprises an x-direction traction rope and two y-direction traction ropes, and the three traction ropes are detachably connected with the outer end and the left and right sides of the cantilever steel beam through respective rope buckles of the three traction ropes. The key of the manual correction device is to use the two groups of idler wheels to alternately support and lubricate the cantilever end and use the traction ropes to pull for correction. According to the manual correction device and the construction method, the cantilever ends of the cantilever steel beams can be kept aligned in all directions of x, y, and z.

Description

technical field [0001] The invention relates to the technical field of connection construction of truss-type steel structures in civil engineering, and specifically relates to a manual device for correcting the cantilevered end of a cantilevered steel beam when installing a cantilevered steel beam on a section steel column of a truss-type steel structure. A method for constructing cantilevered steel beams by utilizing the device. Background technique [0002] Large-scale venues mostly adopt a truss-type steel structure connected vertically and horizontally by steel beams and section steel columns. In the above-mentioned truss-type steel structure, it is often necessary to construct a cantilevered platform protruding outside to serve as a cantilevered stand or rain shelter. The specific construction method is to connect and fix a row of parallel cantilevered steel beams on the upper part of a row of parallel steel columns, that is, cantilevered steel beams, and then connect t...

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Problems solved by technology

[0005] There are many reasons for the above problems. One is that the construction personnel’s specific operation errors lead to the error of the final position of the cantilevered end. The other is that most of the weight of the cantilevered steel girder still remains when the inner end of the cantilevered steel girder is welded and fixed. It is lifted by a crane, and the cantilever end lacks effective support, which makes the construction more difficult and will further enlarge the deviation of the cantilever end; the third and more important reason is that each steel column inevitably has errors in actual construction, and it is impossible Keep it completely vertical, so the top of the steel column has a deviation from inside to outside or from left to right, and the cantilevered beam is welded with the inner end against the top of the steel column and the steel column as the reference plane. Errors will naturally occur. Although the error at the top of the steel column is kept within the acceptable range of construction, after the enlargement of the large-scale and large-volume cantilever beam, it is finally reflected in the error of the outer end of the cantilever beam, that is, the cantilever end. , it will naturally be magnified to an unsightly and unacceptable level

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