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Electrifying dismounting method for steel reinforced concrete structure building

A reinforced concrete and building technology, which is applied in the direction of building construction, construction, building maintenance, etc., can solve the problems of cracking of the concrete protective layer, reducing the mechanical performance and durability of the structure, and affecting performance, so as to save manpower, material resources and the environment. The effect of less interference and controllable process

Inactive Publication Date: 2008-02-20
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion of steel bars can not only reduce the cross-sectional area and reduce the bearing capacity of components, but also reduce the binding force between steel bars and concrete, affecting the performance of the two working together
At the same time, due to the volume expansion of the steel bar after corrosion, the concrete protective layer is broken or even falls off, thereby reducing the mechanical performance and durability of the structure and destroying the safety of the structure.
However, these studies all regard the corrosion effect of steel bars as a major threat to structural safety and strive to prevent it. They did not expect to use this effect in reverse to achieve the purpose of demolishing concrete structures.

Method used

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  • Electrifying dismounting method for steel reinforced concrete structure building
  • Electrifying dismounting method for steel reinforced concrete structure building

Examples

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Effect test

example 1

[0037] 1) Example 1: Demolition of multi-span and multi-storey concrete structures

[0038] For a six-storey frame structure residential building, the column grid layout is shown in Figure 2.

[0039] (1) Selection of failure columns: Taking the whole structure to collapse southward as an example, the seven columns on the south side of the bottom column network are selected as failure columns.

[0040] (2) Select 4 areas A, B, C, and D with equal spacing in the vertical direction of each selected column, and determine 3 sections at each position with twice the thickness of the protective layer as the vertical interval to arrange Externally inserted steel bars 9, as shown in Figure 3.

[0041] (3) In the 12 cross-sections, along the long side direction, the external reinforcement bars 9 are arranged on both sides of the middle longitudinal bar, as shown in Fig. 4 . Among them, for the 12 sections of No. 2 and No. 6 columns, according to the calculation, two-way externally inser...

example 2

[0043] 2) Example 2: Demolition of a single-span multi-storey structure

[0044] (1) Make the whole structure collapse inward: as shown in Figure 6, select the six columns inside the bottom column network as the failure columns, and make the whole structure collapse inward after the failure of failure.

[0045] (2) Make the structure collapse to the left (right) side: as shown in Figure 6, select the five columns on the left (right) side of the bottom column network as the failure columns, and make them fail as above, so that the structure can move to the left (Right) Side collapsed.

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Abstract

The invention relates to an electrifying dismantling method for reinforced concrete structure. The method includes the following steps: selecting several pillars as destroying object and taking rapidly corrosion to the inner reinforced steel bar; taking process the pillars: taking insulation process to the section of the reinforced steel bar, inserting light-round reinforced steel bar that has the same diameter, connecting the stainless steel block or copper sheet with the negative pole of DC power supply to fasten corrosion, shutting down power supply, and starting dynamo to supply cross-range pull to the pillars. The invention has the advantages of low cost, convenient to operate, controllable process and little disturbance to environment. It could improve the dismantling efficiency and save manpower and material resources.

Description

technical field [0001] The invention relates to a method in the technical field of construction, in particular to an electrified demolition method for a reinforced concrete structure building. Background technique [0002] At present, my country's infrastructure construction is in the coexistence stage of large-scale new construction and a large number of aging buildings. The renewal of urban appearance makes the demolition of old buildings more and more frequent. The existing demolition and disintegration technologies of related buildings at home and abroad mainly include: blasting demolition method, prestressed demolition method, mechanical demolition method, static expansion pressure crushing demolition method, hot melt cutting demolition method, special demolition methods such as high-pressure water dragon and laser. law etc. Among them, the blasting demolition method is the most widely used. The basic method is to drill holes densely on the load-bearing members of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/08
Inventor 王艺霖刘西拉
Owner SHANGHAI JIAOTONG UNIV