Hollow carcass used for cast-in-situs concrete filling

Abstract

A hollow carcass for filling cast-in-place concrete, comprising a hollow carcass (1) and a support foot (2), the support foot (2) being arranged on the bottom outer wall (3) of the hollow carcass (1), the outer wall (3) A hollow carcass (1) enclosing a cavity (4), characterized in that the intersecting corners of at least two adjacent surfaces of the hollow carcass (1) are arc angles (5) or chamfers (6 ) or at least one of the inner corners (7), at least one outer wall (3) of the hollow carcass (1) is a prefabricated outer wall (8), and at least one outer wall (3) is an existing wiped outer wall embryo body (9), now Wiping the outer wall embryo body (9) stretches out to have support pin (2). In this way, the stress concentration phenomenon at the corner of the hollow carcass in the hollow slab can be effectively eliminated; at the same time, the hollow carcass is easy to manufacture, has high production efficiency, low cost, and good integrity, and is suitable for cast-in-place reinforced concrete or prestressed steel bars. Concrete hollow slabs, floors, roofs, walls, foundation slabs and bridges, especially for hollow beamless floors.

Description

(1) Technical field [0001] The invention relates to a hollow matrix for filling cast-in-place concrete. (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 that the patent No. is ZL00203695.9, and the name is called "combined concrete hidden rib floor slab" utility model patent, which discloses a formwork member in its specification, which can be solid or holl...

AI Technical Summary

Problems solved by technology

In this way, since the corner where at least two faces of the hollow carcass intersect is an arc angle or a chamfer or a negative corner or a combination thereof, the stress concentration phenomenon at the corner of the hollow carcass in the hollow plate can be effectively eliminated, and the generation of cracks can be prevented. And it can withstand large concentrated loads without damage, improving the mechanical properties of the hollow slab; at the same time, because at least one outer wall of the hollow carcass is a prefabricated outer wall, at least one outer wall is a freshly plastered outer wall, the prefabricated outer wall can be prefabricated, The prefabricated outer wall and the cast-in-place outer wall can be bonded to form a whole. Therefore, the hollow carcass is easy to manufacture, high in production efficiency, low in cost, and has good integrity. Moreover, the embryo body of the existing outer wall has protruding legs, which has good integrity. It is not easy to fall off, thereby better solving the problems existing in the prior art and achieving the purpose of the present invention; in addition, the hollow carcass also has simple structure, high strength, high rigidity, excellent deformation resistance, vibration resistance, and fast construction speed. Fast and other characteristics, suitable for hollow slabs, floors, roofs, walls, foundation slabs and bridges of cast-in-place reinforced concrete or prestressed reinforced concrete, especially for hollow beamless floors

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