Method for controlling mass concrete cooling introduced water flow

Abstract

The invention relates to a method for controlling a mass concrete cooling introduced water flow. The method comprises the following steps of: (1), obtaining a value of a historical concrete introduced water cooling efficiency; and (2), calculating a required next flow control value according to the value of the historical concrete introduced water cooling efficiency and a cooling amplitude and a cooling time interval to be required in the future, and uniformly decreasing concrete temperature according to design requirements through the above steps. According to the method for controlling the mass concrete cooling introduced water flow, provided by the invention, by introducing dynamic adjustment of a practical cooling flow coefficient alpha and by matching with auxiliary modification of a lag coefficient ksi, internal temperature of concrete can be uniformly and stably decreased, and the purpose of controlling a target temperature can be achieved during an expected time; furthermore, automatic calculation of a cooling water flow is realized, manual control arbitrariness can be excluded, and the construction quality of mass concrete can be further increased.

Description

technical field [0001] The invention relates to a cooling control method in concrete pouring, in particular to a cooling water flow control method for large-volume concrete. Background technique [0002] After the mass concrete is poured, such as the dam body of a dam, due to the heat release of cement hydration, a large amount of heat will be generated inside it and the temperature will rise sharply. If the heat cannot be discharged well, it will cause tensile stress inside the concrete Then cracks occur, resulting in quality accidents. At present, in addition to measures such as reducing the temperature of the concrete mixture and covering the insulation quilt, the most direct and effective method is to bury cooling water pipes inside the concrete and pass in cooling water to discharge heat. The main goal of using cooling water pipes to cool concrete is to make the concrete temperature drop evenly and steadily and reach the control target temperature within the expected t...

AI Technical Summary

Problems solved by technology

This kind of empirical control method often has the phenomenon of steep temperature rise and fall and rebound, which is very unfavorable to the quality of concrete.

[0004] Chinese patent "201010579967.1" discloses a large-volume concrete cooling water pipe layout method; Chinese patent "201010219769.4" discloses an automatic data collection system for concrete cooling water; Chinese patent "201010228838.8" discloses an intelligent concrete cooling water system The technical scheme of adopting the cooling water pipe to cool the concrete recorded in the above patent documents provides a basis for realizing the present invention, but how to realize the steady and uniform decline of the internal temperature of the concrete through flow control is not recorded in the above patent documents.

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