Large-span combined type overload eccentric slope angle steel structure integrated synchronous jacking construction method

Abstract

The invention discloses a large-span combined type overload eccentric slope angle steel structure integrated synchronous jacking construction method. The method comprises the following steps that 1, acorresponding number of jacking foundations are constructed on a terrace according to a plurality of set jacking point locations; 2, after the terrace is hardened, ground splicing and acceptance inspection of combined steel structures are performed; 3, jacking equipment is installed, and jacking is performed; 3.1, ground assembling of crossed joists is performed on the multiple set jacking pointlocations; 3.2, the crossed joists are lifted to the positions of net rack upper chord balls; 3.3, hemispherical hinged supports are concentrically welded to the bottoms of the crossed joists; 3.4, the combined steel structures achieve supporting conversion from net rack lower chord balls supported by buttresses to the net rack upper chord balls supported by jacking frames through a jack; 3.5, synchronous jacking is performed; 3.6, supplementing and splicing installing of net rack support position balls and connecting rod pieces thereof can be performed, and then the whole structure falls backin position. Overhead operation can be greatly reduced, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to a construction method for jacking up a steel structure, in particular to a construction method for synchronous jacking up of a large-span combined overweight eccentric slope angle steel structure as a whole. Background technique [0002] With the continuous development of construction technology, the grid structure has been rapidly developed and widely used in the past 30 to 40 years due to its characteristics of high rigidity, good integrity, good seismic performance, light weight, steel saving and good adaptability. At present, the traditional grid installation methods include high-altitude assembly method, lifting method, overall hoisting method and jacking method, which are several common construction methods. The high-altitude assembly method needs to consume a large amount of frame materials to build an operation platform, and the material rental and labor costs are relatively high. Although the overall hoisting and posi...

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Problems solved by technology

The high-altitude assembly method needs to consume a lot of frame materials to build the operation platform, and the material rental and labor costs are high

Although the overall hoisting and positioning method has the characteristics of simple construction, convenience, short construction period, and easy guarantee of project quality, the cost of the crane shift is too high, and the crane travel road needs to be dealt with. The construction cost is very high, and the key is that it is still limited by the site. , it is difficult to meet the construction requirements; although the overall hydraulic lifting is not limited by the site, the requirements for the original structure as a reliable hoisting fulcrum are relatively high, and the structural steel column cannot meet the bearing capacity requirements

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