Mass concrete construction method of super-thick foundation

Abstract

The invention discloses a mass concrete construction method of a super-thick foundation, comprising the following steps of: (1) binding the steel bars on a base plate of the foundation, and fixing cooling water pipes on a steel bar fixing frame, wherein the cooling water pipes are evenly distributed at the inside layers of the foundation; (2) blending the concrete; (3) pouring the concrete; (4) carrying out press polishing to the concrete on the surface of the foundation before the final setting of the concrete of the foundation; and (5) maintaining the foundation. The invention adopts the anti-cracking concrete so as to reduce the cement content and decrease the generation of the heat of hydration; the embedding of the cooling water pipes can shorten the emission time of the heat in the concrete and decrease the maintenance time of the concrete structure; the press polishing is carried out to the surface of the concrete structure to ensure that the desiccation fissures are prevented; and maintaining the concrete with preserved temperature and humidity can improve the quality of the concrete. The invention has the effects of at least improving the work efficiency by 4 times, greatly saving the cost, improving the work efficiency and paving the way for the advanced construction of the next process.

Description

technical field [0001] The invention relates to a large-volume concrete construction method, in particular to a super-thick foundation large-volume concrete construction method. Background technique [0002] In the construction of basic engineering of metallurgical industrial equipment, especially blast furnace engineering, as the scale of blast furnace increases, the amount of foundation concrete increases accordingly. During the continuous pouring and hardening of mass concrete, the hydration reaction of cement generates a large amount of hydration heat. The thickness of concrete is ≥5m, the thermal resistance is very large, the internal hydration heat accumulation is not easy to dissipate, the hydration temperature rises high, and the surface dissipates heat quickly, forming a large temperature difference between the interior and surface of the concrete. Changes in the temperature difference between the interior and surface of the concrete plus the influence of external e...

AI Technical Summary

Problems solved by technology

The occurrence and development of concrete cracks not only affect the appearance of the project, but also accelerate the carbonation of concrete, affect the frost resistance and impermeability of the structure, cause the infiltration of moisture and harmful substances, induce corrosion of steel bars or accelerate the natural aging of concrete, thus damaging the engineering structure The bearing capacity, function and durability of the structure may even become a precursor to structural damage, directly affecting the performance of engineering benefits.

Images