Fastening method for high-strength concrete epibolic thin-layer and coupled columns

A high-strength concrete and concrete technology, which is applied in the direction of building reinforcement, building maintenance, structural elements, etc., can solve the problems of increasing the cross-sectional area of ​​columns, occupying a large space, and unsightly appearance, so as to increase the cross-sectional area of ​​columns and improve the bearing capacity , good reinforcement effect

Inactive Publication Date: 2005-02-23
李国雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of ordinary reinforced concrete to strengthen the column with an enlarged section reinforcement method, the strength of the concrete used in the traditional enlarged section reinforcement method is generally less than C40, and the steel bars used are Class I and II steel bars, and the increased thickness after reinforcement is 80-100mm Therefore, the cross-sectional area of ​​the column is greatly increased after reinforcement, which has the disadvantages of large volume, large space occupation, unsightly appearance, and even affects the use

Method used

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  • Fastening method for high-strength concrete epibolic thin-layer and coupled columns
  • Fastening method for high-strength concrete epibolic thin-layer and coupled columns

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Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, in this embodiment, a layer of high-strength concrete outer covering thin layer is added on the surface of the column. The outer covering thin layer is composed of concrete with a grade strength of C50 and high-strength steel wire mesh 3, and the high-strength steel wire mesh 3 is fixed on the reinforced The surface of the column 1 is covered with the concrete on the high-strength steel wire mesh 3 to form a high-strength concrete thin layer, and the thickness of the high-strength concrete thin layer is 30mm. In order to enhance the bonding force between concrete and steel wire mesh 3, a small amount of commonly used micro-expansion agent and polymer are added to the concrete. The high-strength steel wire mesh 3 is composed of φ4 cold-drawn steel wires, together with the concrete with a grade strength of C50, it forms a concrete high-strength steel wire mesh with a strength above C50, and the tensile strength of the steel mesh is above 450 MPa...

Embodiment 2

[0033] The characteristics of this embodiment are: the outer thin layer is composed of concrete with a grade strength of C40 and high-strength steel mesh, and the thickness of the high-strength concrete thin layer is 40mm. Concrete construction steps are identical with embodiment 1.

Embodiment 3

[0035] The characteristics of this embodiment are: the outer thin layer is composed of concrete with a grade strength of C60 and high-strength steel mesh, and the thickness of the high-strength concrete thin layer is 25mm. Concrete construction steps are identical with embodiment 1.

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Abstract

The present invention relates to a strengthening external layer suitable for column and its method for strengthening column. It is characterized by that said strengthening external layer is formed from concrete whose grade strength is greater than or equal to C40 and high-strength steel wire mesh or mesh reinforcement. The high-strength steel wire mesh or mesh reinforcement can be fixed on the surface of column to be strengthened, and the high-strength steel wire mesh or mesh reinforcemnt is covered with the described concrete so as to form the high-strength concrete thin layer whose whickness is less than or equal to 40 mm. Said invention also provides its construction method and steps for strengthening column.

Description

technical field [0001] The invention relates to a reinforced outer layer suitable for columns and a method for strengthening the column, in particular a high-strength concrete outer layer and a method for strengthening the column, which is suitable for strengthening axially compressed columns and small eccentrically compressed columns column. It belongs to the technical field of building reinforcement. Background technique [0002] In actual production and life, it is often necessary to reinforce existing building columns. The reinforcement method in the prior art is the method of strengthening the cross-section of the column, although the calculation of the bearing capacity in this method follows the basic provisions of the current national standard "Code for Design of Concrete Structures" and considers the new concrete and the original structure for calculation. However, due to the use of ordinary reinforced concrete to strengthen the column with an enlarged section rein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/04E04G23/00
Inventor 李国雄
Owner 李国雄
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