Hollow member for concrete

Abstract

Disclosed is a hollow member for concrete, which comprises a hollow formwork (1), characterized in that at least two of formworks (1) are arranged alternatively, the opposed faces of the hollow formworks (1) constitute a cast-in-situ in-concrete rib moulding chamber (2), the inner rib moulding chamber (2) is provided with at least one spacing tension member for connecting the opposite or adjacent hollow formworks (1), the hollow formwork (1) is provided with at least a boss module (5) projected from the floor surface (4), at least one of the spacing tension members (3) is parallel or / and crossing to the side wall. The invention can be applied to cast-in-situ reinforced concrete or prestressed reinforcement concreteí»s hollow storied-building roofings, house roofings, foundation slabs, hollow walls, and hollow bridges.

Description

[0001] This application is a divisional application of an invention patent application with an application date of July 5, 2003, an application number of 03145651.0, and a title of "a hollow member for concrete". (1) Technical field [0002] The invention relates to a hollow component for concrete. (2) Background technology [0003] 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, and the upper plate, the surrounding side walls and the lower bottom form a polyhedral cavity. Another example is the patent...

AI Technical Summary

Problems solved by technology

In this way, since there is a boss module protruding from the bottom surface on the bottom surface of the hollow formwork, after the hollow member is applied to the cast-in-place concrete floor, the cast-in-place concrete rib forms an inverted T-shaped rib, and its cross-sectional shape changes from a rectangle to an inverted T-shaped rib. T-shaped, so the mechanical properties of the floor are greatly improved, which can reduce the cross-sectional size of the dense rib, reduce the amount of steel and concrete, and reduce the cost of the floor. The spacer braces are connected into one body to form hollow formwork components. The hollow formwork is arranged from a single layout to a group layout. It is very convenient to locate each other, and it is not easy to cause misalignment and affect the construction quality of the floor. At the same time, the construction efficiency is also greatly improved. The overall quality of the cast-in-place concrete floor is guaranteed, the requirements of the mechanical properties of the floor are met, and the construction cost is reduced, thereby better solving the problems existing in the prior art and achieving the purpose of the present invention. In addition, the hollow member It also has the characteristics of simple structure, high strength, excellent deformation resistance, vibration resistance, easy manufacture, and low cost. It is suitable for hollow floors, roofs, foundation floors, and walls of various cast-in-place reinforced concrete or prestressed reinforced concrete. It can be used with hollow bridges, especially suitable for hollow beamless floors.

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