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High-rise frame column concrete replacement method based on active control technology

A technology of active control, high-rise framing, applied in the direction of columns, pier columns, pillars, etc.

Active Publication Date: 2020-05-12
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And need to use professionals to operate jacks, etc.

Method used

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  • High-rise frame column concrete replacement method based on active control technology
  • High-rise frame column concrete replacement method based on active control technology
  • High-rise frame column concrete replacement method based on active control technology

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Experimental program
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Effect test

Embodiment 1

[0037] 1. Concrete column drilling and coring steps

[0038] figure 1 It is a schematic diagram of the coring position of the concrete frame column. In order to facilitate the work of the coring machine, the actual coring position is determined according to the current situation of the site structure. Basically, the vertical distance between the center position of the coring and the bottom of the beam or the top of the slab is 200mm.

[0039] Before setting out the coring position of the concrete frame column, first use the steel bar scanner to determine the position of the main reinforcement and stirrup, and try to avoid damaging the main reinforcement of the concrete frame column during the construction process.

[0040] The coring adopts water transfer hole to obtain the steel pin socket 11 on the concrete frame column, inserts a 40Cr steel pin 31 with a diameter of 44mm into the steel pin socket, and installs the connection node I for the stress system conversion. In orde...

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Abstract

The present invention relates to a high-rise frame column concrete replacement method based on active control technology. The method comprises the following steps: inserting steel pins in holes in a to-be-replaced concrete frame column; securing one end of steel diagonal braces to the steel pins and the other end to beam plates and making the steel diagonal braces able to slide horizontally; setting pulling pre-stress tendons at connection nodes II on both sides of the concrete frame column; installing vertical steel braces on the floor of the to-be-replaced concrete frame column at positionscorresponding to the steel diagonal braces; installing a strain gauge and a displacement monitoring point to monitor real-time force change and structure deformation; actively controlling shaft forceof the steel braces through the pulling of the pre-stress tendons and monitoring data to unload the shaft force of the concrete frame column; removing the concrete in blocks and re-pouring and buryingthe concrete strain gauge; and removing the steel braces and rotating for use when the strength of the concrete meets requirements, thereby achieving the replacement of the concrete of the high-riseframe column. According to the invention, the active control of the unloading of the concrete frame column shaft force is achieved through real-time monitoring of the construction.

Description

technical field [0001] The invention relates to a construction method for concrete replacement of high-rise frame columns, belonging to the technical field of building construction. Background technique [0002] Reinforced concrete structure is the most common structural form of high-rise buildings, and the strength of concrete columns directly affects building safety. However, in actual engineering, engineering quality accidents are prone to occur due to various factors, especially the strength of concrete. When the concrete strength grade differs greatly from the design requirements, the general treatment method is: remove all the concrete columns on unqualified floors and the buildings on the floors above, and completely rework. Although this method can make up for project quality problems, the economic loss is relatively large. Big. The other is to adopt various reinforcement measures such as enlarging the section reinforcement method, outsourcing steel reinforcement m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/00E04G21/02E04G21/14E04C3/34
CPCE04C3/34E04G21/00E04G21/02E04G21/14
Inventor 王永泉杜吉坤邵翔李天福李世宏
Owner NANJING INST OF TECH
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