Large-span net rack external expansion assembly integral jacking construction method
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A construction method and overall jacking technology, which is applied in the direction of construction, building structure, and building material processing, etc., to achieve the effects of easy installation, good social benefits and economic benefits
Inactive Publication Date: 2020-11-24
CHINA CONSTR EIGHTH ENG DIV
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[0004] The technical task of the present invention is to provide a large-span network frame external expansion assembly overall jacking construction method to solve how to reduce the construction difficulty under the complex conditions of spherical shells, cylindrical shells, flat panels and various special-shaped venues. , Reduce high-workload operations, improve safety and ensure construction quality at the same time
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Embodiment 1
[0098] The overall jacking construction method of the large-span network frame external expansion assembly of the present invention, the construction method is specifically as follows:
[0099] (1) Assembling and jacking: the net frame is assembled on the ground, and the jacking bracket is installed when it is assembled to the position of the stand, and the jacking bracket is used to lift the net frame to a set height (each jacking height is different, determined according to the civil engineering situation) When the next grid assembly is satisfied, stop the jacking work;
[0100] (2) Symmetrical expansion assembly: After the jacking work stops, the space rigidity unit that has been assembled is symmetrically expanded from the center of the network frame, so that the network frame continues to extend around;
[0101] (3) Adjust the number and position of the jacking points: when splicing outwards, adjust the number and position of the jacking points of the grid according to th...
Embodiment 2
[0104] as attached figure 1 As shown, the overall jacking construction method of the large-span network frame external expansion assembly of the present invention, the technical process of the construction method is as follows:
[0105] S1. Preparations before construction; details are as follows:
[0106] S101. Check the grid materials that have entered the field, and stack the balls and poles separately, and check the processing dimensions of the balls and poles to ensure the installation accuracy, otherwise they cannot be used;
[0107] S102. The debris piled up on the site must be cleaned up to ensure the smooth progress of the project construction;
[0108] S103. Use MIDAS to calculate the number and position of jacking frames according to the site conditions and structural shape, and perform stress and deformation calculations; after the network frame is checked and calculated, if any overstressed rods are found, temporarily reinforce them, that is, use clamps on the ou...
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Abstract
The invention discloses a large-span net rack external expansion assembly integral jacking construction method, which belongs to the field of building construction. The technical problem to be solvedby the invention is how to reduce the construction difficulty of large-span net rack structures of a spherical shell, a cylindrical shell, a flat plate and various special-shaped stadiums under complex conditions, reduce high-altitude operations, improve safety, and ensure the construction quality. The adopted technical scheme is that the large-span net rack external expansion assembly integral jacking construction method comprises the following steps of: assembly and jacking, that is, the net rack is assembled on the ground, and when the net rack is assembled to a stand position, a jacking bracket is installed, and the jacking work is stopped when the net rack is jacked by using the jacking bracket to a preset height to meet the next grid assembly; symmetrical external expansion assembly,that is, after the jacking work is stopped, symmetrical external expansion assembly is performed on completed space stiffness units from the center of the net rack to make the net rack continue to extend to the surroundings; adjustment of the number and locations of jacking points, that is, when performing expansion assembly outward, the number and positions of the jacking points of the net rackare adjusted according to calculation results; and unloading and dismantling.
Description
technical field [0001] The invention relates to the field of building construction, and is especially suitable for projects with spherical shells, cylindrical shells, flat plates, and various special-shaped grids with a lower chord elevation of 25m or less, especially for grid structures with welded joints, bolted ball joints and welded ball joints. Specifically, it is an overall jacking construction method for external expansion and assembly of large-span grids. Background technique [0002] With the construction of large-scale stadiums, theaters, and cultural and sports centers around the world, more and more types of long-span steel structure grids are applied to building roofs. On the one hand, the steel structure network frame of this type of project has a large span, a large volume and a high height. On the other hand, since the network structure is often erected in the center of the venue, it is often difficult to lift the periphery of the hoisting machinery during co...
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Application Information
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