Evacuated shuttering member

Abstract

The present invention provides an evacuated shuttering member including upper plate (1), a peripheral lateral wall (2), a bottom (3), the upper plate (1), the peripheral lateral wall (2), the bottom (3) compose the polyhedron evacuated shuttering member, which is characterized in that at least a lateral direction angle on bottom of the evacuated shuttering member is a hidden angle (4), and at least a vertical groove (5) is arranged on at least a periphery lateral wall (2). Thus after the evacuated shuttering member is used for cast-in-situ building cover, the cast-in-situ bar between the evacuated shuttering member is inverse T shape, meantime, at least a vertical groove is arranged on a periphery lateral wall the evacuated shuttering member, and concrete forms cast-in-situ concrete frusta, column or enforcing rib of the cast-in-situ rib, which greatly improves mechanics capacity of the building, the intensity and rigidity is improved to bear load concentration, which is suitable for cast-in-situ concrete or pretension steel bar concrete building, building cover, wall body, base bottom plate and open web bridge.

Description

(1) Technical field [0001] The present invention relates to a cavity formwork member. (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, and the upper plate, the surrounding side walls and the lower bottom form a polyhedral cavity. Another example is the patent No. ZL00203695.9 applied by Liang Jun, Shijiazhuang City, Hebei Province on February 23, 2000, and the name is called "combined concrete hidden rib floor cover plate" utility model patent, which discloses a formwo...

AI Technical Summary

Problems solved by technology

However, after being applied to the hollow floor, the cast-in-place concrete ribs formed between the cavity formwork members are all rectangular cast-in-place concrete ribs, and their mechanical performance is not very reasonable, so it is often necessary to increase the cross-sectional size of the cast-in-place concrete ribs , increase the amount of steel bars and concrete, and increase the cost of the floor. At the same time, in the evacuated part of the cavity formwork, the strength and stiffness of the hollow floor are relatively poor, and the ability to withstand concentrated loads is relatively low. Therefore, the development of a A new type of cavity formwork member is urgently needed

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