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Apparatus for underpinning reinforced concrete column by adopting prestress technology

A technology of reinforced concrete columns and prestressed steel bars, which is applied in building maintenance, construction, building construction, etc., can solve the problems that the screw cannot be taken out and the cost is high, and achieves the effects of low cost, convenient construction and wide application range

Inactive Publication Date: 2012-09-12
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The penetrated steel bars and screws generally cannot be taken out, and the cost is high

Method used

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  • Apparatus for underpinning reinforced concrete column by adopting prestress technology
  • Apparatus for underpinning reinforced concrete column by adopting prestress technology
  • Apparatus for underpinning reinforced concrete column by adopting prestress technology

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Embodiment Construction

[0017] As shown in the figure, a device for underpinning reinforced concrete columns using prestressing technology improves the underpinning bearing capacity by increasing the interface pressure between old and new concrete, and builds reinforced concrete wrapped column beams 6 around the reinforced concrete columns 1 to be underpinned , around the outside of the reinforced concrete beam 6 are respectively provided with a direction-1 restraint steel plate 2 and a direction-2 restraint steel plate 3 for enclosure, and prestressed tendons 4 pass through the reserved direction-1 restraint steel plate 2 and direction-2 restraint steel plate 3 Prestressing is applied to the reserved round hole by tensioning the prestressed steel bars 4, and the two ends of the prestressed steel bars 4 are fixed by anchors 5. The present invention is improved on the basis of the underpinning of the original column-wrapped beam, and adopts prestressing technology to increase the vertical pressure on t...

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Abstract

An apparatus for underpinning reinforced concrete columns by adopting prestress technology improves underpinning bearing capacity by enhancing new and old concrete interface pressure. A reinforced concrete column clasping beam (6) is constructed around an underpinned reinforced concrete column (1), and a first direction restraint steel plate (2) and a second direction restraint steel plate (3) are installed respectively all around the external of the reinforced concrete column clasping beam (6) for enclosure protection of the beam. A prestressed bar (4) traverses reserved round holes reserved on the first direction restraint steel plate (2) and the second direction restraint steel plate (3) and applies prestress by stretching a prestressed reinforcing bar (4) and two ends of the prestressed bar are fixed by an anchor (5). The apparatus in the invention uses principle that performance of concrete is improved in the three-direction restraint condition and that friction increases with increasing interface pressure and more efficiently uses performance of material. Underpinning and loading have wide applicability.

Description

technical field [0001] The patent of the invention relates to an underpinning device and an underpinning method for a reinforced concrete column, belonging to the discipline field of engineering structure reinforcement and reconstruction and application of prestressing technology. Background technique [0002] Reinforced concrete structure is one of the most widely used structural forms at home and abroad. Due to design and construction defects, various damages or improved use requirements, a large number of engineering structures need to be reinforced and transformed. Structural underpinning technology refers to the technology of changing the load transmission path, which is widely used in the fields of building jacking and rectification engineering, building large space renovation engineering, and building overall displacement engineering. The most common engineering underpinnings include column underpinnings and foundation underpinnings. Currently, column underpinning me...

Claims

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Application Information

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IPC IPC(8): E04G23/02
Inventor 吴二军曹兆娜陈竹张兴龙王建永朱峰岐
Owner HOHAI UNIV
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