Hollow core die for cast-in-place concrete hollow filling

Abstract

The invention discloses a hollow core die for cast-in-place concrete hollow filling, which comprises plates (12), wherein at least two connected plates (12) form a hollow member. The hollow core die is characterized in that: the plates (12) are connected with at least one hinge (2), the side of the hinge (2) is provided with a reinforcing rib (5), the plates (12) are hollow plates (12), and parallel hollow tubular holes (15) are formed in the plates (12). When the outer wall is a hollow porous outer wall and the hollow outer wall is provided with at least one hinge, the hollow core die has low dead weight, can be folded in a plate state, can save a large amount of transportation space and stacking space during transportation and stacking, and can exponentially improve the transportation quantity and reduce the transportation and storage costs in a small space; when the hollow core die is applied, the hollow core die in a folded state is unfolded; and the hollow core die is convenient for application and construction, and is suitable for various hollow slabs, hollow floors, roofs, foundation bottom plates, walls and open web bridges of cast-in-place reinforced concrete or pre-stressed reinforced concrete, especially hollow girder-less floors.

Description

[0001] This application is a divisional application of an invention patent application with an application date of July 24, 2006, an application number of 2006101071813, and a title of “A Hollow Mandrel for Cast-in-situ Concrete Hollow Filling”. (1) Technical field [0002] The invention relates to a hollow mandrel for pouring-in-situ concrete hollow filling. (2) Background technology [0003] At present, in the prior art, the hole-forming member of the cast-in-place reinforced concrete hollow slab is a permanent mandrel, such as a paper tube, a plastic tube, a metal bellows, and a mandrel made of lightweight materials. These tubular mandrels or components are mainly considered to evacuate the concrete and reduce the weight of the hollow slab. For example, the patent No. ZL99249775.8 applied by the applicant is a utility model patent named "fiber-reinforced thin-walled tube for filling cast-in-place reinforced concrete". It consists of a hard thin-walled tube and plugs at bo...

AI Technical Summary

Problems solved by technology

However, the half part of this hollow thin-walled member cannot be folded into a plate shape, so the space occupied during transportation is still large, and the transportation volume is still small each time. Therefore, a new type of cast-in-place concrete is developed. The hollow mandrel for hollow filling is urgently needed

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