Mold for concrete preformed hole and construction method

Abstract

The invention belongs to construction field of concrete structure and particularly relates to mold for concrete and construction field, which includes a mold carrier, a magnetic attraction body, a magnetic attraction particle, an elastic tube body, a cover plate and the like. The magnetic attraction body is arranged on the mold carrier. The magnetic attraction particle is arranged in elastic tube body. The elastic tube body provided with the magnetic attraction particle twines on the mold carrier provided with magnetic attraction body. The mold for concrete preformed hole and construction method mainly uses the magnetic attraction of the magnetic attraction body and then the magnetic attraction particle in the elastic tube body will be adsorbed on the outer wall of the mold carrier, which can separate the concrete and the mold carrier when placing the concrete. The elastic tube body with the magnetic attraction particle will be pulled out after initial set of concrete and then the cavity of a ring mold carrier is found around the mold carrier, thus the mold carrier is easy to take out. The mold for concrete preformed hole and construction method is simple in production, convenient and rapid to install and disassemble and low in cost, and the mold can be reused.

Description

technical field [0001] The invention belongs to the field of concrete structure construction, and in particular relates to a mold for reserved holes in concrete and a construction method thereof. Background technique [0002] Nowadays, the reserved holes of various pipelines in buildings are mostly made of one hole and one mold, and the molds are all disposable, which not only wastes materials, but also makes it difficult to fix the molds. Some are fixed by welding with iron pipes. Although it is easy to fix this way, it is difficult to locate accurately due to the barriers such as templates. A long time is very easy to cause leakage due to corrosion; concrete pouring piles have been more and more used in the foundations of high-rise buildings, bridges, subways, etc., but the removal of pile heads has always been a headache. Although there are many patents in this area, most of them use plastic pipes to cover the main reinforcement of the steel cage. In this way, when the s...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, the reserved holes for various pipes in buildings are mostly made of one hole and one mold, and the molds are all disposable, which not only wastes materials, but also makes it difficult to fix the molds.

Some are fixed by welding with iron pipes. Although it is easy to fix this way, it is difficult to locate accurately due to the barriers such as templates. After a long time, it is easy to cause leakage due to corrosion; concrete pouring piles have been more and more used in the foundation of high-rise buildings, bridges, subways, etc., but the removal of pile heads has always been a headache.

Although there are many patents in this area, most of them use plastic pipes to cover the main reinforcement of the steel cage. In this way, when the steel cage is placed in the pile hole and the concrete is poured, the pressure of the mud can easily cause the plastic pipe to shift. The height of the plastic pipe binding is tied with the elevation of the steel cage, but due to the reason of the crane, the steel cage is generally divided into several sections for hanging, after lifting one section into the pile hole, then lifting the other section, this Most of the joints are connected by welding or screws, and there are often errors in this joint. In some cases, the elevation of the steel cage and the elevation of the pile hole differ by several tens of centimeters, which directly leads to the ineffectiveness of the tied plastic pipes.

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