Anchoring-device-free prestress high-strength steel stand mesh U-shaped concrete member reinforcing method

A technology of prestressed steel strand and anchoring device, which is applied in bridge reinforcement, building construction, erection/assembly of bridges, etc., can solve the problems of easy cracking, increase the self-weight of the beam, increase the thickness of the mortar reinforcement layer, etc., to achieve convenient construction, Improve construction efficiency and use efficiency

Inactive Publication Date: 2017-06-30
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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Problems solved by technology

However, in actual engineering, the prestressed steel strands are arranged as longitudinal reinforcement at the bottom of the beam, and the corners of the web and the bottom of the beam are prone to cracking due to stress concentration

Method used

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  • Anchoring-device-free prestress high-strength steel stand mesh U-shaped concrete member reinforcing method
  • Anchoring-device-free prestress high-strength steel stand mesh U-shaped concrete member reinforcing method
  • Anchoring-device-free prestress high-strength steel stand mesh U-shaped concrete member reinforcing method

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Embodiment Construction

[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as Figure 1-4 As shown, a method for U-shaped reinforcement of concrete members with prestressed high-strength steel strand nets without anchoring devices, including the bottom of the reinforced concrete beam to be reinforced is provided with a U-shaped reinforcement system for reinforcement, and the U-shaped reinforcement system includes cladding The U-shaped mortar fixed layer at the bottom of the reinforced concrete beam to be reinforced, the prestressed steel strands of the bottom plate arranged at longitudinal intervals, the prestressed steel strands of the web plate and the transverse U-shaped steel strands arranged at intervals in the transverse direction (the prestressed steel strands of the bottom plate are used in the actual implementation process) High-strength steel strands, web prestressed high-strength steel strands and transve...

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Abstract

The invention discloses an anchoringdevice-free prestress high-strength steel stand mesh U-shaped concrete member reinforcing method. The method comprises the following steps that (1) a stretching bed is erected; (2) prestress steel strands are installed; (3) the prestress steel strands are stretched; (4) holes are punched in the bottom of a beam for steel bar planting; (5) U-shaped steel strands are installed; (6) polymer mortar is sprayed to the outer layer; and (7) the ends of the prestress steel strands on the fixed cross beam at the stretching end are cut off, the stretching bed is detached, and reinforcing is completed. No anchoring device is arranged in the stretching bed, the thickness of a reinforcing layer is small, the dead weight is low, the reinforcing layer is good in bonding performance, convenient and fast to construct, excellent in reinforcing effect and high in adaptability, and corner areas are not prone to cracking after reinforment.

Description

technical field [0001] The invention relates to the technical field of strengthening bridges or other building structures, in particular to a U-shaped method for strengthening concrete components with prestressed high-strength steel strand nets without an anchoring device. Background technique [0002] In order to prolong the service life of reinforced concrete beams, it is often necessary to reinforce them. How to strengthen or repair them without dismantling the original components is a hot spot in the industry. Among them, the prestressed steel strand reinforcement technology has the advantages of small weight increase, good durability, and good compatibility between mortar and concrete. It is favored by the reinforcement industry and is widely used in structural reinforcement projects such as bridge construction. However, in actual engineering, the prestressed steel strands are arranged as longitudinal reinforcement at the bottom of the beam, and the corners of the web a...

Claims

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Application Information

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IPC IPC(8): E01D22/00E04G23/02
CPCE01D22/00E04G23/0218
Inventor 罗征王银辉王小荣陈闯王韬
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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