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Reinforced concrete hollow beam and fabricating method thereof

A technology of reinforced concrete and hollow beams, applied in the direction of joists, girders, truss beams, etc., can solve the problems of many manufacturing hours, large steel content, heavy self-weight, etc., and achieve production process specifications, high mechanical strength, and success rate high effect

Inactive Publication Date: 2010-05-05
苑玉山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still the following deficiencies in the production of existing reinforced concrete beams: (1) the volume is large, the weight is heavy, and the amount of raw materials is large, especially the steel content is relatively large. Generally, the steel content of ordinary reinforced concrete beams is between 185~230kg / m 3 (2) Many hours of production, high cost, rough production process and maintenance process, poor quality control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Make a reinforced concrete hollow beam with a length of 7m, a width of 0.2m, and a height of 0.55m. Four holes of φ100mm are arranged in parallel in the beam, and the distance between the holes and the centers of the holes is 125mm. The upper edge is 35mm from the top of the beam, the left and right edges of the four holes are 50mm from the left and right sides of the beam; the bottom of the beam is 15mm from the bottom, and 10mm from the left and right sides. There are 2 groups of φ12 threaded steel bars, 2 in each group, and 1 φ10 threaded steel bar is placed vertically at a distance of 15mm from the top of the beam and 10mm from the left and right sides. The 10 steel bars are hooped longitudinally by φ5 steel wires, and there are 39 hoops in total.

[0018] The various materials and dosage are as follows: 109.2kg of water, 218.4kg of cement, 371.3kg of yellow sand, 677.1kg of gravel, 8 7m long φ12 threaded steel bars, 2 7m long φ10 threaded steel bars, 1.5m long φ5 co...

Embodiment 2

[0024] Make a reinforced concrete hollow beam with a length of 8m, a width of 0.2m, and a height of 0.55m. Various materials and dosage are as follows: 124.8kg of water, 249.6kg of cement, 424.3kg of yellow sand, 773.8kg of gravel, 8 8m long φ12 threaded steel bars, 2 8m long φ10 threaded steel bars, 1.5m long φ5 cold drawn low 45 carbon steel wires.

[0025] Prepare a mold with a size of 8m×0.2m×0.55m, and apply a release agent inside the mold. Process the prepared steel bar into a steel bar skeleton, in which two φ12 threaded steel bars are placed on each of the lower two sides, four φ12 threaded steel bars are placed in two groups in the middle, and one φ10 threaded steel bar is placed on each of the upper two sides, and the 6 groups of steel bars are cold drawn with φ5 The low-carbon steel wire is hooped and fixed, and there are 45 uniform hoops in total. Install the steel skeleton made in the mould, and vertically place 4 mandrel pipes of φ100mm in the mould.

[0026] ...

Embodiment 3

[0028] Make a reinforced concrete hollow beam with a length of 7.5m, a width of 0.2m, and a height of 0.55m. The amount of various materials is as follows: 117kg of water, 234kg of cement, 396.9kg of yellow sand, 725.4kg of gravel, 8 7.5m long φ12 threaded steel bars, 2 7.5m long φ10 threaded steel bars, 1.5m long φ5 cold drawn low carbon 42 steel wires.

[0029] Prepare a mold with a size of 7.5m×0.2m×0.55m, and apply a release agent inside the mold. Process the prepared steel bar into a steel bar skeleton, in which two φ12 threaded steel bars are placed on each of the lower two sides, four φ12 threaded steel bars are placed in two groups in the middle, and one φ10 threaded steel bar is placed on each of the upper two sides, and the 6 groups of steel bars are cold drawn with φ5 The low-carbon steel wire is hooped and fixed, and there are 42 uniform hoops in total. Install the steel skeleton made in the mould, and vertically place 4 mandrel pipes of φ100mm in the mould.

[...

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Abstract

The invention relates to a reinforced concrete hollow beam which is 7-8m long, 0.2m wide and 0.55m high, four holes with phi 100mm are arranged in the beam in parallel, the interval between the centers of each two holes is 125mm, the distance from the lower edge of the bottom hole to the lower side of the beam is 40mm, the distance from the upper edge of the top hole to the upper side of the beam is 35mm, and the distances from the left edge and the right edge of the four holes to the left side and the right side of the beam are 50mm respectively; and two deformed steel bars with phi 12 are vertically arranged in the positions on the lower surface of the beam of 15mm to the lower side and 10mm to the left side and the right side like two rows, two groups of four deformed steel bars with phi 12 are transversely arranged between the two deformed steel bars in parallel, one deformed steel bar with phi 10 is vertically arranged in the positions of 15mm to the upper side of the beam and 10mm to the left side and the right side respectively, the ten steel bars are longitudinally hooped by steel wires of phi 5, and concrete is used for casting and molding. The fabricated reinforced concrete hollow beam has concrete strength grade of C30 grade, steel bar content of 169.5kg / m3, uniformly distributed load of 13.7KN / m, standard bending moment of 109.6KN / m, small solid volume, light self-weight, a small number of a variety of used materials, low cost, standard production technology, high force-bearing strength and high success rate.

Description

technical field [0001] The invention relates to a beam for construction, in particular to a hollow beam made of reinforced concrete, and also relates to a manufacturing method of the reinforced concrete hollow beam. Background technique [0002] At present, in the construction of ordinary residential buildings, especially in the construction of vast rural houses, beams made of reinforced concrete have gradually replaced wood and other building materials. The cost of beams is lower than that of wood, and it is very economical. However, there are still the following deficiencies in the production of existing reinforced concrete beams: (1) the volume is large, the weight is heavy, and the amount of raw materials is large, especially the steel content is relatively large. Generally, the steel content of ordinary reinforced concrete beams is between 185~230kg / m 3 (2) Many man-hours are produced, the cost is high, the production process and maintenance process are rough, and the...

Claims

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Application Information

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IPC IPC(8): E04C3/20E04C5/03B28B11/24B28B1/087
Inventor 苑玉山
Owner 苑玉山
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