Construction process for arched cylindrical-shaped latticed shell provided with arched steel grid jig frame by adopting slippage installation

Abstract

The invention discloses a construction process for an arched cylindrical-shaped latticed shell provided with an arched steel grid jig frame by adopting slippage installation. The construction process comprises following steps: (a) installing a slippage tool structural system; (b) installing an arched steel grid jig frame; (c) installing a slippage power system; (d) adjusting the longitudinal position of the arched steel grid jig frame; (e) installing the steel latticed shell of an arched cylindrical-shaped raw-material closing field; (f) dismounting a construction platform; (g) dismounting an arched steel grid load-bearing frame and arch foot supports; (h) dismounting the slippage power system; (i) dismounting the slippage tool structural system.The construction process for the arched cylindrical-shaped latticed shell provided with the arched steel grid jig frame by adopting slippage installation has following beneficial effects: the arched steel grid jig frame is reasonably arranged and technology of slippage tool structural system is adopted so as to be favorable for improving working efficiency, shortening working period, saving material, reducing construction cost and enhancing safety guarantee; and furthermore, adverse influence upon simultaneous construction of the lower portion of the steel latticed shell and other professional engineering projects is reduced to the minimum level during engineering construction of the steel latticed shell so that the overall working period is further shortened.

Description

technical field [0001] The invention belongs to the field of building steel structure engineering construction, and in particular relates to a construction process of an arched tubular reticulated shell provided with an arched steel grid tire frame for sliding installation. Background technique [0002] The open-air raw material storage yards used by enterprises such as thermal power, cement industry, and steel smelting will not only cause raw material loss due to raw material dust scattering, but also cause environmental pollution due to raw material dust flying. With the strengthening of awareness of environmental protection, energy saving, and material saving, enterprises such as thermal power energy, cement industry, and steel smelting are vigorously building, rebuilding, and expanding closed raw material storage closed sites. From the comprehensive consideration of the use function, economy and other aspects, the super long-span arched cylindrical reticulated shell stru...

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Problems solved by technology

[0004] At present, the on-site construction schemes of the ultra-long-span arched cylindrical steel reticulated shell in the closed raw material storage field include: (1) the high-altitude bulk method, which refers to the assembly of the rods and nodes of the reticulated shell directly at the high-altitude design position. method, the high-altitude bulk method is light in weight, and vertical transportation does not require large-scale lifting equipment, but it needs to build an assembled tire frame, which takes up a lot of scaffolding tube materials, increases the corresponding cost, and requires a long construction period; (2) block Installation method, which refers to the installation method that divides the structure into several block units from the plane, and lifts them to the high-altitude design position by hoisting machinery to assemble them into a whole. Most of the welding and assembly work is carried out on the ground, and there are few high-altitude operations. It is good for quality control and can save a large number of assembly brackets, but temporary reinforcement measures need to be considered after the structure is segmented, and assembly tire frames still need to be erected at the post-assembly rods and unit joints, which requires a long construction period; (3) The overall hoisting method , which means that after the structure is assembled into a whole on the ground, it is hoisted to the design position with lifting equipment as a whole. This construction method minimizes the work at heights, but the internal civil work of the building cannot be carried out during the process from assembly to hoisting. Construction has a certain impact on the construction period, requires a long construction period, and has relatively high performance requirements for lifting equipment

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