Maintenance for foam in inner-layer well wall concrete of freezing shaft

Abstract

The invention discloses a maintenance device for foam in inner-layer well wall concrete of a freezing shaft. The maintenance device for the foam in the inner-layer well wall concrete of the freezing shaft comprises a liquid foam layer, a foam maintenance drum, a foam original solution storage vessel, a foam generator and a warm water pipe. The foam maintenance drum comprises a drum wall and a drum bottom. The drum bottom is located at the outer side of the drum wall and is fixedly connected with the drum wall. The liquid foam layer is formed between the concrete inner-layer well wall and the drum wall of the foam maintenance drum. The foam maintenance drum is arranged at the inner side of the concrete inner-layer well wall and is hung at the lower portion of a form stripping disk. A liquid inlet of the foam generator is communicated with a liquid outlet of the foam original solution storage vessel and fluid in a water outlet of the warm water pipe. According to the maintenance device for the foam in the inner-layer well wall concrete of the freezing shaft, a good maintenance condition is provided for the inner-layer well wall concrete of the freezing shaft, a plenty of water can be saved, and at the same time, temperature cracking caused by different temperatures of the inside and the surface of the concrete inner-layer well wall, so that the quality of the shaft is guaranteed.

Description

technical field [0001] The invention relates to the technical field of mine underground engineering construction, in particular to a concrete foam maintenance device for the inner layer of a frozen shaft shaft. 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 water temperature cont...

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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