Construction method of whole reverse replacement of structure

A construction method and integrated technology, applied in building construction, building maintenance, construction, etc., can solve the problems of large lateral unloading of external walls, large cantilever length of external walls, wall damage, etc. The effect of reducing the length of the wall cantilever, reducing the amount of single unloading, and shortening the time difference

Inactive Publication Date: 2010-09-15
SHANGHAI CONSTR NO 1 GRP
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Problems solved by technology

For the case of retaining the original outer wall in the historic protection building, this method has the following problems: the overall removal of the original structure will cause the external wall to unload too much in a single lateral direction, whic

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  • Construction method of whole reverse replacement of structure
  • Construction method of whole reverse replacement of structure
  • Construction method of whole reverse replacement of structure

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[0019] In the following, the construction method of the invention will be further described in conjunction with the drawings and a five-story structure including a roof renovation project as an example.

[0020] As shown in Figure 1, the construction method for the overall reverse replacement of the structure of the present invention includes the following steps:

[0021] (1), such as Figure 1a As shown, firstly construct the first floor: remove the decorative layer of one layer, remove the original floor slab 2 of the second floor, and temporarily retain the original beams, load-bearing columns 1 and the original inner wall 3 of the upper layer;

[0022] (2) Set up the bent frame to the bottom of the lower beam of the original floor slab on the second floor, and carry out the construction of the external wall reinforcement layer 8 of the first floor and the new frame column 7 of this floor;

[0023] (3) Dismantle the original second-story beams, support formwork, tie up steel bars, a...

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Abstract

The invention discloses a construction method of whole reverse replacement of a structure, comprising the following steps: (1) constructing N numbered layers: removing the N+1st layer of original floorslab, and temporarily reserving an original girder, a heel post and an inner wall on the upper layer thereof; (2) building a bent frame to the lower girder bottom of the N+1st layer of the original floorslab, and carrying out construction on an outer wall reinforced layer and the new frame column of the layer; (3) removing the N+1st layer of the original floorslab, erecting form, binding reinforcing steel bars, and pouring the N+1st layer of new frame girder and the floorslab; (4) repeating the above steps, and upwards constructing layer by layer; and (5) after capping the new frame girder, removing the temporarily reserved original heel post and internal wall from top to bottom. The invention can reduce external wall side once unloading amount caused by integral removal of the original structure, shortens the time difference between old structure removal and new structure formation, does not damage the reserved external wall and saves extra timbering cost for the external wall; and old structure removal and new structure construction are carried out simultaneously so as to shorten the construction period.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to a reverse replacement construction method for a whole structure, in particular to a structural replacement method for retaining building reconstruction. Background technique [0002] When the overall structure of the old building is replaced and reconstructed, the original structure is often demolished from top to bottom, and then the new structure is constructed layer by layer. For the case of retaining the original outer wall in the historical protection building, this method has the following problems: the overall removal of the original structure will cause the external wall to unload too much in a single lateral direction, which will cause serious damage to the wall, and the new structure has not yet been formed at this time. If the cantilever length of the reserved external wall is too large, it is easy to lose stability, and additional support is req...

Claims

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Application Information

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IPC IPC(8): E04G23/02E04G23/08
Inventor 凌旭辉徐杨斌陈国成
Owner SHANGHAI CONSTR NO 1 GRP
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