High-strength, large-size and strong-constraint cable bent tower concrete crack control method

Abstract

The invention discloses a high-strength, large-size and strong-constraint cable bent tower concrete crack control method. The crack control method comprises the following steps: performing cracking risk assessment on different parts of a concrete structure, and quantitatively analyzing influence factors of a cracking risk coefficient; carrying out concrete mix proportion optimization design; arranging a cooling water pipe in the concrete structure, and burying a temperature deformation element; in summer high-temperature weather, adding flake ice during concrete premixing, and strictly controlling the pouring interval of new concrete and old concrete; performing warm water storage curing after concrete pouring is completed, and curing the side surface through a wood formwork with a formwork; cutting a pull rod on the side surface after form removal, and immediately sticking a heat-preservation and moisture-preservation maintenance cloth; and detecting and observing the cracks on the surface of the concrete after curing is finished. By means of the crack control method, the cracking risk is reduced, generation of high-strength, large-size and strong-constraint cable bent tower concrete cracks is effectively controlled, the quality of the concrete structure is improved, the later maintenance cost is reduced, and meanwhile the durability of the concrete structure is improved.

Description

technical field [0001] The invention belongs to the technical field of building engineering construction, and in particular relates to a method for controlling cracks in concrete of a high-strength, volume-strength, and strong-constrained cable tower. Background technique [0002] At present, with the rapid development of the scale of bridge construction projects, the problem of cracks in the towers has always been a major problem in bridge structures. When the concrete structure cracks, the corrosion rate of the erosive medium will also be greatly accelerated, and the durability of the concrete structure will further deteriorate. In severe cases, the force of the structure will be affected, which will eventually lead to a reduction in service life, and at the same time, the maintenance cost will also increase significantly. Therefore, the control of concrete cracks is the premise of ensuring the service life of structural concrete, and the control of non-load cracks during ...

AI Technical Summary

Problems solved by technology

At present, there is still a lack of systematic theoretical analysis and quantitative research on the hydration heat temperature rise, temperature stress, and concrete shrinkage of the cable tower, which will cause problems such as unreasonable design of the structural system or crack-resistant structure, and inappropriate construction technology and maintenance methods, resulting in cracks. Generation and development, causing engineering hidden dangers

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