Hole constructing component for in situ cast steel bar reinforced concrete

Abstract

A hole-forming member for in-situ casting the reinforced concrete is such a one used to combine a whole cavity. The connecting parts are used to combine two or more said members to form a hollow thin-wall member. Its advantages are high strength, low cost and high construction speed.

Description

(1) Technical field [0001] The invention relates to a hole-forming component for cast-in-place reinforced concrete. (2) Background technology [0002] At present, in the prior art, the hole-forming components of the cast-in-place hollow floor slab are permanent mandrels, such as paper tubes, plastic tubes, metal bellows, and lightweight materials for mandrels. These tubular mandrels or components are mainly considered to evacuate the concrete and reduce the weight of the floor 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 head seals both ends of the hard thin-walled tube to form a closed cavity. The hard thin-walled tube wall is composed of a matrix and a cementitious material. The matrix can be glass fiber or carbon fiber or organic fiber or non-woven fabric or Fiber ...

AI Technical Summary

Problems solved by technology

In this way, the production of the hollow tube is troublesome and the cost is relatively high, which undoubtedly increases the cost of the hollow floor.

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