Hollow formwork member for cast-in-situ concrete

Abstract

Disclosed is a cast-in-situ hollow shuttering member, which comprises an upper bottom, peripheral side panels (5), and a lower bottom (6), the upper bottom (4) and the peripheral side panels (5) constitute a formwork (7), the formwork (7) and the lower bottom (6) enclose a shuttering member (3) with a closed cavity, characterized in that the formwork (7) is assembled from at least two separate formwork slabs (9) through split joint, at least one of the separate formwork slabs (9) or / and reinforcing rib (10) or / and reinforcing rib (11) or / and reinforcing rod (12) is provided with a pair of overlapping positioning member (14). The invention can be applied to cast-in-situ reinforced concrete or prestressed reinforcement concrete's hollow storied-building roofing, house roofing, walls, foundation bedplates and hollow bridges.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 4, 2003, an application number of 03118134.1, and a title of "a cast-in-place reinforced concrete hollow floor". (1) Technical field [0002] The invention relates to a cast-in-place concrete hollow formwork component. (2) Background technology [0003] At present, most buildings with brick-concrete structure and frame structure use prefabricated hollow-core slabs as floor slabs, which have the advantages of fast construction speed and low cost. However, because there is no firm connection between two adjacent prefabricated hollow slabs, only cement mortar is used to fill the joints, so the integrity is poor, which is not conducive to earthquake resistance, and cracks and water seepage often occur in the gaps. In order to solve the above problems, many buildings adopt the method of cast-in-place concrete floors (solid and hollow). Although the problems of ...

AI Technical Summary

Problems solved by technology

However, the formwork components used in this type of hollow floor are closed-cavity polyhedron structures, and the specific structural relationship between the upper bottom, the lower bottom, and the surrounding side walls of the formwork components is not introduced, so the overall molding of the formwork components is difficult and the production process is complicated. , high cost, and the construction cost of the corresponding floor is high. Therefore, it is urgently needed to develop a new type of cast-in-place concrete hollow form member

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