Construction method for splicing large-span steel trusses in a suspending manner at top of extra-high plant

Abstract

The invention discloses a construction method for splicing large-span steel trusses in a suspending manner at the top of an extra-high plant. The construction method comprises the following steps: a, determining the sectioned splicing scheme of each steel truss according to the hoisting capacity of a hoisting device equipped on a construction site; b, designing and manufacturing components according to the splicing scheme; c, using a double beam bridge crane, equipped in an existing plant, as a suspended operation platform; d, erecting customized supporting frames on the girder of the double beam bridge crane; e, hoisting the components by a tower crane equipped in a plant under construction to the suspended operation platform for splicing; f, conducting unloading deformation monitoring; g, moving the double beam bridge crane to a part under a next to-be-mounted steel truss, and repeating the e process to splice the steel truss; and constructing a truss girder between the spliced adjacent steel trusses. The tower crane and the double beam bridge crane, which are equipped in the plant under construction, are sufficiently used, and the components are hoisted on the suspended operation platform for splicing forming. The construction method is fast to mount, short in construction period, high in safety, and low in mounting cost.

Description

technical field [0001] The present invention relates to a steel structure installation method, in particular, the present invention relates to a large-span steel truss suspended construction method, especially a construction method for splicing large-span steel truss suspended in the air on the top floor of a factory building nearly 100 meters high. Background technique [0002] Large-scale launch vehicles are the power devices for launching spacecraft. The vertical installation height of slender rockets is usually tens of meters. Of course, the supporting workshops must have corresponding space and height to meet the requirements of vertical assembly and testing. In reality, the factory building used for the final assembly and testing of large-scale launch vehicles is a single-storey flat-roofed house with a height of nearly 100 meters and a structure that is empty inside and solid outside. The connected truss beams are composed together, and the two ends of each steel trus...

AI Technical Summary

Problems solved by technology

Due to the large volume and heavy weight of the steel truss to be lifted, it is impossible to achieve a vertical lift of nearly 100 meters with the conventional building lifting equipment configured on the construction site

It is theoretically feasible to use multiple large-scale lifting equipment to work together. In fact, in addition to the high cost of this lifting method, the most difficult thing to control is coordination. The damage of the heavy ones will cause an overturning accident, so this lifting method cannot be used in actual production

If a full-scale scaffolding is set up in the factory building, and the scaffolding is used as a platform to splice large-span steel trusses, although this scheme is operable, it takes about 1,000 tons of steel pipes to build a full-scale scaffolding, and the construction volume is large and the construction period is long. The biggest problem The built-in full-frame hand frame occupies the indoor space, and the rocket assembly and testing cannot be carried out simultaneously during the construction of the steel truss, and related projects cannot be constructed, so this solution is not practical

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