Cast-in-place concrete hollow cavity shuttering member

Abstract

A cavity die shell member for casting-in-place concrete includes a top plate, surrounding walls and a bottom forming a polyhedron cavity shell member, among which, the bottom extends from one side of the walls to form a cantilever characterizing insetting a transversed inside corner at a transversed corner. So that, a cast-in-place reinforcing rib can be formed at the inside corner after using it to cast a hollow floor so as to elimnate the stress concentration at the crossed corner of the top plate and the rib to avoid cracks.

Description

(1) Technical field [0001] The invention relates to a cavity formwork component for 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 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, wh...

AI Technical Summary

Problems solved by technology

However, at the intersection of the cast-in-place concrete upper slab on the cavity formwork member and the cast-in-place concrete rib between the cavity members, the stress on the floor is more complicated, the stress is more concentrated, and cracks are easy to occur, or even cracked and damaged.

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