Method for grouting sealing of gap between steel door frame of protective sealed door and wall

Abstract

The invention relates to a method for grouting sealing of a gap between a steel door frame of a protective sealed door and a wall, which belongs to the technical field of architectural construction. The method comprises the following construction steps of: 1) drilling and cleaning holes, namely drilling the holes on a concrete surface nearby the gap upwards or downwards by aiming at the direction of the gap, and cleaning dust in the holes after drilling; 2) embedding needle heads, namely embedding grouting needle heads through tool fastening; 3) grouting: a, mixing a water-soluble polyurethane chemical grouting material with an oil-soluble polyurethane chemical grouting material according to a weight proportion of 1:1 to prepare serous fluid; and b, starting grouting the serous fluid from a first needle head, immediately stopping the grouting when the serous fluid emerges from an adjacent needle head, continuously grouting the serous fluid from a second needle head, and performing the grouting forwards in turn; and 4) processing needle holes, namely after the serous fluid is coagulated, removing the grouting needle heads, and sealing the holes. The method has the advantages of simple process, convenient construction, reliable performance, corrosion resistance, no generation of mildews, high expansion efficiency, obvious construction effect and the like.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a method for sealing the gap between a steel door frame of a protective airtight door and a wall by grouting. Background technique [0002] At present, in the construction of the underground civil air defense area of ​​the construction project, after the concrete pouring is completed, the bond between the steel civil air defense door frame and the concrete is often not dense, and there are gaps. This situation often occurs at the lower sill of the door frame. The reasons for this situation are 1. The material properties of the steel door and the concrete are different, and fundamentally they cannot be bonded well; 2. The poured concrete is poured from both sides of the door frame, and the concrete is filled to the bottom of the threshold only by its own fluidity and gravity 3. After the pouring is completed, the concrete surface will drop due to the shri...

AI Technical Summary

Problems solved by technology

The reasons for this situation are: 1. The material properties of the steel door and concrete are different, and fundamentally they cannot be bonded well; 2. The poured concrete is poured from both sides of the door frame, and the concrete is filled to the bottom of the threshold only by its own fluidity and gravity 3. After the pouring is completed, the concrete surface will drop due to the shrinkage of the concrete itself, resulting in technical problems such as gaps

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