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Prestress steel wire rope strengthened concrete beam construction method

A technology of concrete beams and construction methods, applied in building reinforcements, building maintenance, structural elements, etc., can solve problems such as insufficient bearing capacity of concrete beams, and achieve good structural performance and safe and reliable operation

Inactive Publication Date: 2020-09-18
叶香竹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a construction method for reinforcing concrete beams with prestressed steel wire ropes, which solves the problem of insufficient bearing capacity of concrete beams

Method used

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  • Prestress steel wire rope strengthened concrete beam construction method
  • Prestress steel wire rope strengthened concrete beam construction method
  • Prestress steel wire rope strengthened concrete beam construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this embodiment, a steel beam 1 is set below the concrete beam 6. The steel beam 1 adopts channel steel. The main reinforcement of the concrete beam 6 is welded with the steel beam 1. There are two middle fulcrum steel wire ropes 2, and each middle fulcrum steel wire rope 2 is respectively located on both sides of the concrete beam. The two corners of the bottom of the steel beam 1 are respectively provided with pre-piercing holes. The position of the pre-piercing holes along the span direction is the mid-span position of the concrete beam 6. 28mm, the diameter of the middle fulcrum steel wire rope 2 is 25mm, the middle fulcrum steel wire rope 2 passes through the pre-punctured hole and the reserved hole of the concrete floor 7 and is fixed on the steel anchor hoop 4, the diameter of the reserved hole of the concrete floor 7 is 28mm, and the basket bolt 5 is arranged inside the steel wire rope. The position is above the concrete floor 7, and the steel anchor hoop 4 co...

Embodiment 2

[0051] A steel beam 1 is set under the concrete beam 6, the steel beam 1 adopts channel steel, the main reinforcement of the concrete beam 6 is welded with the steel beam 1, and the mid-span position of the concrete beam 6 is provided with a middle fulcrum steel strand 9, and the middle fulcrum steel strand 9 is located in the concrete The middle part of the beam 6 section, the middle part of the concrete beam 6 section is provided with a pre-piercing hole, the diameter of the pre-piercing hole is 35 mm, the diameter of the steel strand 9 of the middle fulcrum is 32 mm, and the steel strand 9 of the middle fulcrum passes through the pre-piercing hole and the reserved hole of the concrete floor 7 and is fixed on the steel The anchor hoop 4, the diameter of the hole reserved in the concrete floor 7 is 28 mm, and the steel anchor hoop 4 connected with the steel strand 9 at the middle fulcrum is set at a position 600 mm above the concrete floor 7. In order to ensure the connection b...

Embodiment 3

[0062] A steel beam 1 is set under the concrete beam 6, and the steel beam 1 adopts channel steel, and the main reinforcement of the concrete beam 6 is welded with the steel beam 1. The fulcrum prestressed strut 11 is located in the middle of the section of the concrete beam 6, the middle of the section of the steel beam 1 is provided with a support hole, the support hole is inserted into the tee joint, and a rubber pad with a thickness of 10mm is set between the support hole and the tee joint. The rod 11 has a diameter of 35mm, and a horizontal strut 13 is arranged between the left middle fulcrum prestressed strut 11 and the right middle fulcrum prestressed strut 11 . The steel anchor hoop 4 connected with the lower end of the middle fulcrum prestressed strut 11 is set at a position 600mm below the concrete floor, the steel anchor hoop 4 is arranged around the brick wall 8, the cross-sectional shape of the steel anchor hoop 4 is square, and the steel plate forming the steel an...

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Abstract

The invention discloses a prestress steel wire rope strengthened concrete beam construction method characterized by comprising the construction steps that (1) prepunched holes are drilled in designated positions of two corners of the bottom of a steel beam; (2) concrete of the lower portion of a concrete beam is chiseled away, a main bar is exposed, and the steel beam and the main bar are welded;(3) whitewash on the surface of a brick wall is peeled, an annular brick groove is drilled, and a steel plate forming a steel anchoring hoop penetrates through the annular brick groove, and a whole isformed through welding; (4) a reserved hole is drilled in a concrete floor; (5) central pivot steel wire ropes penetrate through the prepunched holes in the bottom corners of the steel beam to be fixed to the steel anchoring hoop, and turnbuckles between the steel wire rope and the steel anchoring hoop are installed; (6) prestress is applied to the central pivot steel wire ropes through the turnbuckles; (7) gaps between the steel wire ropes and the reserved hole of the concrete floor are closed by high-strength glue; and (8) whitewashing is conducted with high-strength mortar on the two sidesof the concrete beam.

Description

technical field [0001] The invention relates to a construction method for reinforcing concrete beams with prestressed steel wire ropes, which is suitable for the construction field. Background technique [0002] When the bearing capacity of concrete beams is not enough, the traditional method is to use steel beams at the bottom of the concrete beams for reinforcement. The deformation is inconsistent, and it is difficult for the steel beam and the concrete floor to bear the load together. Tests have shown that when the concrete beam reaches the edge of failure, the bearing capacity of the steel beam often does not reach 50%, and the bearing capacity of the steel beam is limited. Contents of the invention [0003] The invention provides a construction method for reinforcing a concrete beam with a prestressed steel wire rope, which solves the problem of insufficient bearing capacity of the concrete beam. [0004] In order to improve the bearing capacity of the steel beam in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02E04C5/08
CPCE04C5/08E04G23/0218
Inventor 叶香竹
Owner 叶香竹