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Method for strengthening wood beam

A technology of wood beams and bamboo pieces, applied in the direction of joists, girders, trusses, etc., can solve the problems of destroying the facade and style features of buildings, affecting the integrity and safe use of connected wooden columns, bucket arches and wooden roof trusses.

Active Publication Date: 2011-01-26
上海建科预应力技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the method of replacing the whole root was generally used, but because the wooden structures in our country mostly use tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will inevitably affect the integrity and safe use of the connected wooden columns, bucket arches and wooden roof trusses. It may even damage the architectural facade and style features of the building

Method used

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  • Method for strengthening wood beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Due to the increase in load, the bearing capacity of the 200mm wooden beam cannot meet the safety requirements and needs to be reinforced. Such as figure 1 , 2 As shown, the upper part of the wooden beam 1 is the compression surface 4, and the bottom is the tension surface 3. The implementation steps are:

[0018] (1) Unload the load on the wooden beam first. Surface smoothness treatment is carried out on the tensile surface 3 (ie bottom surface) of the wooden beam 1, and scrubbed with acetone, so that the flatness and cleanliness of the tensile surface (bottom surface) meet the paste requirements. If there are cracks or pits on the bottom surface, it needs to be repaired with repair glue.

[0019] (2) Select processed bamboo chips 2 with a thickness of 5 mm, a width of 18 mm, and the same length as the wooden beam, and scrub them with acetone.

[0020] Apply primer on the tensioned surface of the wooden beam, and then stick the bamboo slice 2 on the tensioned surf...

Embodiment 2

[0024] Due to aging, the bearing capacity of the wooden beam with a height of 120mm cannot meet the safety requirements and needs to be reinforced. Such as figure 1 , 2 As shown, the upper part of the wooden beam 1 is the compression surface 4, and the bottom is the tension surface 3.

[0025] The implementation steps are:

[0026] (1) Unload the load on the wooden beam first. Surface smoothness treatment is carried out on the tensile surface 3 (ie bottom surface) of the wooden beam 1, and scrubbed with acetone, so that the flatness and cleanliness of the tensile surface (bottom surface) meet the paste requirements. If there are cracks or pits on the bottom surface, it needs to be repaired with repair glue.

[0027] (2) Select processed bamboo chips 2 with a thickness of 5 mm, a width of 15 mm, and the same length as the wooden beam, and scrub with acetone.

[0028] Apply primer on the tensioned surface of the wooden beam, and then stick the bamboo slice 2 on the tensione...

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Abstract

The invention relates to the field of construction engineering, in particular to construction strengthening and modification and discloses a method for strengthening a wood beam. The method for strengthening the wood beam comprises the following steps of: (1) performing surface evenness treatment on a stressed surface of the wood beam, scrubbing with acetone, and if a bottom face has a crack or recess, mending by adopting mending glue; (2) selecting bamboo chips which are treated by surface processing and are 3 to 7 millimeters thick, 10 to 25 millimeters wide and as long as the wood beam, and scrubbing with the acetone; and (3) coating base glue on the drawn face of the wood beam, adhering at least one layer of bamboo chips on the stressed surface of the wood beam by using structural glue and pressing to ensure that the bamboo chips, the structural glue and the wood beam are bonded compactly. The method can effectively avoid dismantling the original structure, guarantee the bearing capability and durability of the wood beam and meet the subsequent use requirements. The bamboo chip is a regenerative material and has high anti-drawing strength, so that the resource and energy consumption of the construction strengthening and modifying industry can be effectively reduced by using the bamboo chips to strengthen the wood beam.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to building reinforcement and reconstruction, especially the maintenance and reinforcement of wooden beams. Background technique [0002] Most of the traditional buildings in our country are wood structure or brick-wood structure. Due to aging or increased service load, wooden beams often have insufficient flexural capacity and need to be reinforced. In the past, the method of replacing the whole root was generally used, but because the wooden structures in our country mostly use tenon joints, the original structure needs to be dismantled to replace the wooden beams, which will inevitably affect the integrity and safe use of the connected wooden columns, bucket arches and wooden roof trusses. It may even destroy the architectural facade and style features of the building. [0003] If the reinforcement method of pasting bamboo slices on the tensile surface of wooden beams ca...

Claims

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Application Information

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IPC IPC(8): E04G23/02E04C3/12
Inventor 许清风李向民陈建飞邱文军
Owner 上海建科预应力技术工程有限公司
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