Light permanent moulding bed casing for concrete filling

Abstract

Disclosed is a lightweight permanent formwork for concrete filling which comprises a lightweight formwork member (1), the lightweight formwork member (2) including an upper casing (2), peripheral side casings (3), and a lower casing (4), the upper casing (2), the peripheral side casings (3) and the lower board (4) enclose a closed hollow chamber, characterized in that the formwork also comprises a through-hole tube (5) which is arranged in the closed hollow chamber of the lightweight formwork member (1), the lightweight framework member is provided with at least an aperture (6) formed by through hole of the through-hole tube (5) for cast-in-situ concrete casting and penetrating the upper and lower casing surfaces of the lightweight framework member (1), a sub-framework mold for sealing the upper aperture is arranged in the aperture (6). The invention can be applied to cast-in-situ reinforced concrete or prestressed reinforcement concrete's hollow storied-building roofings, house roofings, walls, foundation bedplates and hollow bridges, especially for hollow flat slabs.

Description

(1) Technical field [0001] The invention relates to a lightweight permanent carcass for concrete filling. (2) Background technology [0002] At present, the cast-in-place concrete hollow floor is a widely used floor structure. The lightweight permanent tire molds filled in it include various hollow tubes and boxes, and the boxes are hollow or solid. For example, the patent No. ZL99249798.1, which the applicant applied for on November 29, 1999, is a utility model patent named "fiber-reinforced thin-walled member for reinforced concrete filling", which discloses a thin-walled formwork member, including an upper plate, The surrounding side walls, the lower bottom, the upper plate, the surrounding side walls, and the lower bottom form a polyhedral cavity, and the upper plate, the surrounding side walls, and the lower bottom contain fiber reinforcements. This formwork member has the characteristics of high strength, simple structure, and convenient construction and transportatio...

AI Technical Summary

Problems solved by technology

This formwork member has the characteristics of high strength, simple structure, and convenient construction and transportation. However, when the formwork member is applied to the construction process of the cast-in-place concrete hollow floor, it is difficult to pour and tamp the cast-in-place concrete under the lower bottom of the formwork member. It is difficult to form compactly, especially when the size of the formwork components is large, the performance is more obvious. Therefore, it is urgent to develop a new type of lightweight permanent carcass for concrete filling.

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