Hollow pipe for concrete filling

Abstract

A hollow pipe for concrete filling, comprising a hollow pipe body (1), a plug (2), and the plugs (2) at both ends close the two ends of the hollow pipe body (1) to form a hollow pipe with a closed cavity, which is characterized in that A positioning foot (3) protrudes from at least one of the hollow pipe body (1) or the plug (2). In this way, when the hollow tube is applied to the cast-in-place concrete hollow floor, the positioning and layout of the hollow tube is very convenient for construction, and there will be no displacement or misalignment of each other, the construction is easy, and there will be no inconsistency in the width of the cast-in-place concrete rib between the tubes , the inconsistent thickness of the concrete protective layer outside the pipe, and at the same time, it is also convenient for the construction of the reinforcement in the floor, ensuring the overall quality of the cast-in-place concrete hollow floor, meeting the requirements of the mechanical performance of the floor, and reducing the construction cost; In addition, the hollow tube also has the characteristics of simple structure, easy production, low cost and high strength, and is suitable for hollow floors, roofs, walls, foundation slabs and hollow bridges of cast-in-place reinforced concrete or prestressed reinforced concrete.

Description

(1) Technical field [0001] The invention relates to a hollow pipe for concrete filling. (2) Background technology [0002] At present, in the existing technology, the hole-forming components of cast-in-place hollow slabs are permanent mandrels, such as paper tubes, plastic tubes, metal bellows, and lightweight materials for mandrels. Small floor weight. For example, the thin-walled tube for filling cast-in-place reinforced concrete with the patent No. 99232921.3 is composed of a hard thin-walled tube and plugs at both ends. The two plugs seal the two ends of the hard thin-walled tube to form a closed cavity. The cross-section and plug shape of the thin-walled tube can be round, square, trapezoidal or other irregular shapes. When it is applied to the cast-in-place concrete hollow floor for laying, the pipes are prone to shift or dislocation with each other, the positioning and layout are inconvenient, and the width of the cast-in-place concrete secondary ribs between the pi...

AI Technical Summary

Problems solved by technology

When it is applied to the cast-in-place concrete hollow floor for laying, the pipe bodies are prone to shift or misalignment with each other, the positioning and layout are inconvenient, and the width of the cast-in-place concrete secondary ribs between the pipes is prone to be inconsistent, and the concrete outside the pipe Inconsistencies in the thickness of the protective layer will affect the overall quality and mechanical performance of the cast-in-place concrete hollow floor and increase the difficulty of construction. Therefore, it is urgently needed to develop a new type of hollow pipe for concrete filling.

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