Plastic pipe with thin wall

Abstract

A plastic thin-wall box includes circle-shape thin-wall pipe, blocking plates for enclosing both ends of said circle-shape thin-wall pipe to form a close cavity. The said thin-wall pipe features that it was rolled into circle-shape by a piece of plate; assembled section contact with each other by connecting parts and form a longitudinal assembled strip; at least one dowel go across the assembled parts of the plate of the thin-wall pipe, or of the endings of the thin-wall pipe and the blocking plate. The dowel contacts the plate of the thin-wall plate with the blocking plate strongly, raising the whole function of the plastic thin-wall pipe greatly. It is simple structure, easy construction, low cost, etc. The present invention is suitable for various cast-in-place hollow floor slab, roofing, base slab, wall and open web bridge.

Description

(1) Technical field [0001] The invention relates to a plastic thin-walled pipe. (2) Background technology [0002] 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 both ends. The two ends of the hard thin-walled tube are closed to form a closed cavity. The hard thin-walled tube wall is composed of a carcass and a cementing material. The carcass can be glass fiber or carbon fiber or organic fiber or non-woven fabric or fiber For braided fabric...

AI Technical Summary

Problems solved by technology

In this way, the half part can be formed in the mold at one time, and its production is simple, convenient, and low in cost. Small size, large transportation volume each time, greatly facilitates handling, reduces transportation costs, and correspondingly reduces construction costs of cast-in-place reinforced concrete hollow slabs. However, when this hollow thin-walled member is assembled on site, it is composed of two half parts It is not convenient to fit and fix, the number of parts is large, and there are many processes for preparation and assembly, and the corresponding production cost is high. At the same time, the integrity of hollow thin-walled components is poor. Therefore, the development of a new type of plastic thin-walled tube for urgent need

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