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Two-stage unsupported construction method used for repairing damaged hydraulic concrete beams

A hydraulic concrete and disease technology, applied in water conservancy engineering, construction, marine engineering and other directions, can solve the problems of inability to carry out maintenance, difficult to implement, and unable to bear weight.

Active Publication Date: 2009-10-07
南京瑞迪建设科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty faced in the restoration is that when the main reinforcement is excavated for repair and derusted or replaced, the concrete beam will not be able to bear the upper load or even its own weight due to the pull-out of the main re

Method used

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  • Two-stage unsupported construction method used for repairing damaged hydraulic concrete beams
  • Two-stage unsupported construction method used for repairing damaged hydraulic concrete beams
  • Two-stage unsupported construction method used for repairing damaged hydraulic concrete beams

Examples

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Embodiment 1

[0023] This embodiment takes the repair of the longitudinal girder of an approach bridge located at a seaport wharf along the coast of a certain place as an example. The approach bridge has a length of 147m and a width of 7m, and adopts a pile-based beam-slab structure. The whole bridge consists of 12 bent frames and 11 spans, of which 10 spans use concrete simply supported longitudinal girders. Each bridge spans 3, a total of 30 simply supported beams, with a beam span of 14m. As an approach bridge for an oil terminal, dozens of oil pipelines and other pipelines are arranged on the bridge. After on-site exploration and inspection, the main reinforcement at the bottom of 30 beams was completely corroded, the concrete protective layer burst, and the corrosion loss rate of the steel bar section reached about 25%, which seriously threatened the safety of the project and must be repaired immediately.

[0024] During the discussion of the scheme, some schemes were analyzed and com...

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Abstract

The invention relates to a two-stage unsupported construction method used for repairing damaged hydraulic concrete beams, belonging to the technical field of civil engineering. The construction method comprises the following steps: a node slot hole is manufactured at the lower part of a beam base body; the two sides of the node slot hole of the beam base body are respectively provided with a pulling rod steel bar; a node member is poured at the node slot hole position; concrete which is corroded and damaged at the bottom part of the beam base body is chiseled off; the steel bars which are corroded seriously at the bottom part of the beam base body are removed and loosened and laminated parts are eliminated; the two sides of the bottom part of the beam base body are respectively provided with additional steel bars; and a concrete protective layer with the concave-shaped section is poured at the bottom part of the beam base body and covers the additional steel bars, the pulling rod steel bar and the node member which are built into a whole body with the beam base body. The construction method bears construction period load applied to the beam body by damaged concrete beams and a pulling rod system, and saves external supports. After the construction is completed, the pulling rod steel bar becomes a main stressed bar of the concrete beam, thus realizing that one object has two purposes, solving the difficulties on repairing the hydrostructure, and also greatly saving the engineering cost.

Description

technical field [0001] The invention relates to a two-stage support-free construction method for repairing damaged concrete beams, which is especially suitable for repairing damaged hydraulic structures and belongs to the technical field of civil engineering. Background technique [0002] According to the applicant's knowledge, the repair of structural damage caused by corrosion of steel bars in concrete has become a major engineering problem worldwide, and the corrosion and damage of hydraulic concrete buildings is particularly serious, such as existing wharves, sluices, tide gates, etc. Corrosion of steel bars in construction structures, cracking and exposed reinforcement in concrete protective layer, endangering engineering safety. At present, a large number of corroded and damaged hydraulic concrete structures are facing repair and disposal problems. [0003] Practice has proved that the corrosion damage of beams in hydraulic concrete structures is mainly due to the cor...

Claims

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Application Information

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IPC IPC(8): E02B3/00
Inventor 陈忠华王承强曹宏生
Owner 南京瑞迪建设科技有限公司
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