Hollow member of concrete

Abstract

An empty member for concrete, comprising an empty mould shell (1), characterized in that at least two empty mould shells (1) are arranged alternately, and a cast-in-place concrete inner rib mould cavity ( 2) In the inner rib cavity (2), there is at least one spacer and pulling member (3) for connecting the empty shells (1) on the opposite or adjacent surfaces into one, and there is a spacer (3) on the empty shell (1). The holes (4) for pouring the cast-in-place concrete penetrate through the upper and lower surfaces of the hollow mold shell (1), and the cavity mold shell (1) is a quadrangular truncated mold shell whose upper surface is smaller than the lower surface. It is suitable for all kinds of cast-in-place reinforced concrete or prestressed reinforced concrete hollow floors, roofs, foundation slabs, walls, and empty bridges, especially for hollow beamless floors.

Description

[0001] This application is a divisional application of the invention patent application whose application date is July 7, 2003, the application number is 03147336.9, and the name is "a kind of concrete hollow member". (1) Technical field [0002] The invention relates to an empty web member for concrete. (2) Background technology [0003] At present, cast-in-place reinforced concrete hollow floor is a widely used floor structure, which has the advantages of fast construction speed, small structure height, flexible division of indoor areas and no ceiling decoration. There are various hollow tubes and boxes filled with lightweight permanent tire molds, which can be hollow or solid. For example, the patent number applied for by the applicant on March 10, 1999 is ZL99232921.3, the utility model patent named "Thin-walled tube for in-situ reinforced concrete filling", which consists of a hard thin-walled tube and two plugs. Used in hollow floor as a lightweight permanent tire mold. Anot...

AI Technical Summary

Problems solved by technology

However, when this kind of thin-walled box is used as an empty core formwork, it needs to be constructed individually, and it is inconvenient to locate each other, and it is prone to misalignment, which affects the construction quality and efficiency of the hollow floor. The force-bearing and force-transmitting components of the cover, especially when the size of the hollow formwork is large, are more obvious. Therefore, it is urgent to develop a new type of hollow component for concrete.

Images