Curing technology of frozen shaft concrete inner layer shaft wall with liquid foam

Abstract

The invention discloses a maintenance technology for liquid foam in a concrete inner-layer well wall of a freezing shaft. The maintenance technology for liquid foam in the concrete inner-layer well wall of the freezing shaft comprises the following steps that 1 foam original solution is prepared; 2 an inner wall template on the concrete inner-layer well wall of the freezing shaft is dismantled; 3 the foam original solution prepared in the step 1 is made into foam solution; 4 the foam solution prepared in the step 3 is made into foam, and a foam maintenance device is used for covering the concrete inner-layer well wall of the freezing shaft. According to the maintenance technology for the liquid foam in the concrete inner-layer well wall of the freezing shaft, the maintenance condition of the inner wall concrete is improved to a great extent, the generation of temperature crack in the concrete inner-layer well wall of the freezing shaft can be reduced or controlled effectively, the quality of the freezing shaft is improved, water for the maintenance of the concrete inner-layer well wall of the freezing shaft can also be saved, and the maintenance energy consumption of the concrete inner-layer well wall of the freezing shaft is reduced.

Description

technical field [0001] The invention relates to the technical field of mine underground engineering construction, in particular to a liquid foam maintenance process for the inner layer of a frozen shaft concrete inner shaft wall. Background technique [0002] The inner wall of the frozen wellbore is relatively thick, especially the inner wall of the lower part of the large-diameter vertical shaft, which has a high strength level and a large thickness. It is a large-volume concrete structure. Therefore, after the concrete on the inner wall is poured, there will be a large amount of hydration heat in a short time freed. At present, the surface of the inner wall of the shaft cannot be covered and maintained, and water spraying is often used to maintain the shaft wall. Although many mines have adopted warm water for the maintenance of the inner wall, due to the large amount of spray water consumption, there is a continuous supply of warm water. It must be difficult, and the wat...

AI Technical Summary

Problems solved by technology

At present, the surface of the inner wall of the shaft cannot be covered and maintained, and water spraying is often used to maintain the shaft wall. Although many mines have adopted warm water for the maintenance of the inner wall, due to the large amount of spray water consumption, there is a continuous supply of warm water. It must be difficult, and the water temperature control is quite difficult

As a result, it often occurs that cold water is used instead of warm water to directly flush the concrete well wall, so that a large temperature difference is artificially formed between the inner area and the surface of the inner wall concrete, resulting in many small temperature cracks on the inner wall surface, which affects the quality of the well wall

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