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), a least a prestress rib (5) is clamped on the bottom (3). Thus after the shuttering member is used for cast-in-situ building cover, the mechanics capacity of the building is greatly improved, which can reduce size of the cross section of the cast-in-situ bar, and reduce using quantity of steel bar to reduce the cost, meantime, the rigidity and intensity of the evacuated shuttering member are improved to avoid the break of the bottom and the generation of crack, and appearance of ceiling of the building is not effected, which is suitable for cast-in-situ concrete or pretension steel bar concrete building, building cover, wall body, base bottom plate and 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, during the handling, construction and long-term use of this cavity formwork component, the lower bottom is prone to breakage, cracking, etc., so the cavity formwork component The damage rate is high, the handling and construction are inconvenient, and the construction cost is increased. In addition, if cracks occur after use, the appearance quality of the floor ceiling will be affected. Therefore, it is urgent to develop a new cavity formwork component

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