CN113202206A - Connecting structure of wall body and main body structure and construction method thereof - Google Patents

Connecting structure of wall body and main body structure and construction method thereof Download PDF

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Publication number
CN113202206A
CN113202206A CN202110510009.7A CN202110510009A CN113202206A CN 113202206 A CN113202206 A CN 113202206A CN 202110510009 A CN202110510009 A CN 202110510009A CN 113202206 A CN113202206 A CN 113202206A
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CN
China
Prior art keywords
wall
wall body
construction
constructional column
shear wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110510009.7A
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Chinese (zh)
Inventor
于海申
周志健
高记远
王岩峰
魏鹏
李富强
杨志欣
姚文山
李天赐
王爱博
刘伟
孙雪垛
王润发
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Construction Eighth Engineering Division Co Ltd filed Critical China Construction Eighth Engineering Division Co Ltd
Priority to CN202110510009.7A priority Critical patent/CN113202206A/en
Publication of CN113202206A publication Critical patent/CN113202206A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4178—Masonry wall ties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6801—Fillings therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Load-Bearing And Curtain Walls (AREA)

Abstract

The invention provides a connecting structure of a wall body and a main body structure and a construction method thereof, wherein the connecting structure comprises the following steps: the constructional columns are attached to the side parts of the shear wall of the main body structure, the side wall bodies of the constructional columns, which are far away from the shear wall, are built to form a wall body, and an expansion joint is formed between the wall body and the constructional columns; a buffer plate filled in the expansion joint; and plastering a decorative layer formed on the surface of the wall body and the constructional column so that the surface of the wall body is flush with the surface of the constructional column. The invention solves the technical problems that the shear wall is easy to damage and the wall is easy to damage and settle in the traditional construction mode, and improves the stability of the shear wall and the wall.

Description

Connecting structure of wall body and main body structure and construction method thereof
Technical Field
The invention relates to the technical field of building construction, in particular to a connecting structure of a wall body and a main body structure and a construction method thereof.
Background
The connection mode between traditional shear force wall, structure post and the wall body mainly has: the method adopts a rigid connection method of obliquely building wall roof bricks and a chemical bar planting method of adopting anchor bars to tie the shear wall and the wall body.
The design method adopting rigid connection has the biggest defect that the deformation of the shear wall or the structural column is limited due to the existence of the wall body, so that the shear wall or the structural column is easily damaged by shear force, or the wall body is damaged, and further the building collapse and the like are caused.
The chemical bar planting method also has problems, such as infirm implanted steel bars, durability of chemical binders and the like, and the bar planting method cannot solve the problems caused by settlement after masonry, so that the problems seriously affect the structural safety, reduce the anti-seismic performance of the structure and leave potential quality safety hazards for projects.
Disclosure of Invention
In view of the above situation, the invention provides a connection structure of a wall body and a main body structure and a construction method thereof, which solve the technical problems that a shear wall is easy to damage and a filling box is easy to damage and settle in the traditional construction mode, and improve the stability of the shear wall and the wall body.
In order to achieve the purpose, the invention adopts the technical scheme that:
a wall to body structure connection comprising:
the construction columns are attached to the side parts of the shear wall of the main body structure, the side surfaces, far away from the shear wall, of the construction columns are built to form the wall body, and an expansion joint is formed between the wall body and the construction columns;
the buffer plate is filled in the expansion joint; and
plastering forms a decorative layer on the surface of the wall body and the constructional column, so that the surface of the wall body and the surface of the constructional column are flush.
The connecting structure of the wall body and the main body structure is further improved in that the connecting structure further comprises a plurality of tie bars which are embedded in the shear wall at intervals and partially protrude out of the shear wall, and concrete is poured at positions corresponding to the tie bars to form the constructional column.
The connecting structure of the wall body and the main body structure is further improved in that the connecting structure further comprises a plurality of steel bars vertically connected with the protruding parts of the tie bars, concrete is poured at positions corresponding to the steel bars to form the constructional column, and the steel bars and the protruding parts of the tie bars are embedded in the constructional column.
The connecting structure of the wall body and the main body structure is further improved in that the connecting structure further comprises a steel wire mesh attached to the surfaces of the constructional column and the wall body, and the steel wire mesh is fixed to the surfaces of the constructional column and the wall body through U-shaped hoops; the decorative layer is formed by plastering on the surface of the steel wire mesh, so that the steel wire mesh is embedded in the decorative layer.
The connecting structure of the wall body and the main body structure is further improved in that a floor slab is formed by pouring on the top of the shear wall; the top of constructional column and wall body with be formed with the construction joint between the floor, just it has sealed glue to fill in the construction joint.
The connecting structure of the wall body and the main body structure is further improved in that the connecting structure further comprises sealant which is smeared between the buffer board and the constructional column and between the buffer board and the wall body.
The construction method of the connection structure of the wall body and the main body structure comprises the following steps:
pouring concrete on the side part of the shear wall to form a constructional column;
building the construction columns at the side surfaces far away from the shear wall and at the set intervals from the construction columns to form a wall body;
packing a buffer plate at a set interval between the shear wall and the construction column;
and plastering the construction columns and the surface of the wall body to form a decorative layer so that the surface of the wall body is flush with the surface of the construction columns.
The construction method of the connection structure of the wall body and the main body structure further comprises a plurality of tie bars which are embedded in the shear wall at intervals and partially protrude out of the shear wall, and a plurality of steel bars which are vertically connected with the protruding portions of the tie bars;
and pouring concrete at the position corresponding to the reinforcing steel bar to form a constructional column, and embedding the reinforcing steel bar and the protruding part of the tie bar into the constructional column.
The construction method of the connection structure of the wall body and the main body structure further comprises a steel wire mesh attached to the surfaces of the constructional column and the wall body, and the steel wire mesh is fixed to the surfaces of the constructional column and the wall body through U-shaped hoops;
and plastering on the surface of the steel wire mesh to form the decorative layer, and embedding the steel wire mesh in the decorative layer.
According to the construction method of the connection structure of the wall body and the main structure, the floor slab is formed at the top of the shear wall in a pouring mode, and construction joints are formed between the constructional columns and the top of the wall body and the floor slab;
and filling sealant between the constructional columns and the top of the wall body and the floor slab so as to fill the construction joints.
The connecting structure of the wall body and the main body structure anchors the tie bars in the shear wall, and the steel bars are arranged at the tie bars and poured to form the constructional column, so that the constructional column provides the reference for wall body construction, the wall body is convenient to build at the side part of the constructional column, and the integrity of the shear wall is maintained to the maximum extent; through packing the buffer board and using sealed glue sealed in the clearance between wall body and constructional column, clearance department between wall body and the floor is sealed through sealed glue to avoided the lug connection of wall body and constructional column and floor, provided the wall body, the deformation space of constructional column and floor, and sealed through buffer board and sealed glue, improved the stability of wall body, prevented that the wall body from receiving the striking or collapsing when vibrating, thereby improved building structure's stability.
Drawings
Fig. 1 is a top sectional view of the connecting structure of the wall body and the main structure according to the present invention.
Fig. 2 is a schematic view of a tie bar in the connecting structure of the wall body and the main body structure.
Fig. 3 is a front sectional view of the connecting structure of the wall body and the main structure according to the present invention.
The correspondence of reference numerals to components is as follows: the concrete wall comprises a shear wall 1, a floor slab 2, a tie bar 3, a steel bar 31, a constructional column 4, a wall body 5, a buffer board 6, a decoration layer 7, a U-shaped hoop 71, a steel wire mesh 72 and sealant 8.
Detailed Description
To facilitate an understanding of the present invention, the following description is made in conjunction with the accompanying drawings and examples.
The invention provides a connecting structure of a wall body and a main body structure, as shown in figure 1, the connecting structure of the wall body and the main body structure comprises: the construction column 4 is attached to the side part of the shear wall 1 of the main body structure, the side surface, away from the shear wall 1, of the construction column 4 is built to form a wall body 5, and an expansion joint is formed between the wall body 5 and the construction column 4; a buffer plate 6 filled in the expansion joint; and a decorative layer 7 formed of plastering on the surfaces of the wall body 5 and the construction post 4, the decorative layer 7 making the surface of the wall body 5 flush with the surface of the construction post 4.
According to the construction method of the connection structure of the wall body and the main body structure, the constructional column 4 formed at the tie bar 3 is poured, the constructional column 4 provides a reference for wall body construction, and the wall body is conveniently built at the side part of the constructional column 4, so that the integrity of the shear wall is maintained to the maximum extent; the embodiment can effectively improve the stability of the wall body and the shear wall, prevent the wall body 5 and the shear wall 1 from being deformed under the influence of temperature and weather, and influence the stability of a building structure, and simultaneously improve the shock resistance of the wall body and the shear wall.
A preferred embodiment of the connection structure of the wall body and the main body structure of the present invention is, as shown in fig. 2, further comprising a plurality of tie bars 3 embedded at intervals in the shear wall 1 and partially protruding out of the shear wall 1, and forming a constructional column 4 by pouring concrete at the tie bars 3.
Further, as shown in fig. 3, the structure further includes a plurality of reinforcing bars 31 vertically connected to the protruding portions of the tie bars 3, the structure column 4 is formed by casting concrete at positions corresponding to the reinforcing bars 31, and the reinforcing bars 31 and the protruding portions of the tie bars 3 are embedded in the structure column 4.
Specifically, the tie bar 3 is U-shaped, and the open end of the tie bar 3 is fixedly connected with a reinforcement cage of the shear wall 1; after the shear wall 1 is formed by pouring, the tie bar 3 is partially embedded in the shear wall 1, the closed end of the tie bar 3 protrudes outwards, the reinforcing steel bar 31 is fixed at the closed end of the tie bar 3, concrete is poured at the position corresponding to the reinforcing steel bar 31 to form a constructional column 4, and the closed end of the tie bar 3 and the reinforcing steel bar 31 are embedded in the constructional column 4; the tie bars 3 connect the constructional columns 4 and the shear wall 1, reduce the risk of settlement of the wall body 5 after the wall body is built, and improve the seismic performance of the wall body 5.
Further, as shown in fig. 1, the steel wire mesh fixing structure further comprises a steel wire mesh 72 attached to the surfaces of the constructional column 4 and the wall body 5, wherein the steel wire mesh 72 is fixed to the surfaces of the constructional column 4 and the wall body 5 through a U-shaped clamp 71; the decorative layer 7 is formed by plastering the surface of the steel wire mesh 72, so that the steel wire mesh 72 is embedded in the decorative layer 7.
Preferably, as shown in fig. 2, the U-shaped clips are formed by bending steel bars, the U-shaped clips 71 have a pitch of 1000mm × 1000mm, the open ends thereof are anchored in the constructional column 4 or the wall 5, and the closed ends thereof are engaged with the gaps of the steel wire mesh 72, so that the steel wire mesh 72 is fixedly attached to the surfaces of the wall 5 and the constructional column 4.
Preferably, the steel wire mesh 72 is a fine galvanized steel wire mesh, and the steel wire mesh 72 is convenient for improving the cohesiveness of the decorative layer during plastering, strengthening the binding force among different materials, reducing the cracking risk of the dried decorative layer and improving the engineering quality.
Further, as shown in fig. 3, a floor slab 2 is formed on the top of the shear wall 1 by casting, a construction joint is formed between the top of the constructional column 4 and the wall body 5 and the floor slab 2, and a sealant 8 is filled in the construction joint.
Specifically, the top of the wall 5 is flush with the top of the constructional column 4, and the gap between the wall 5 and the floor slab 2 is filled with the sealant 8.
Preferably, a 15mm gap is reserved between the top of the constructional column 4 and the floor slab 2, after the concrete strength meets the requirement, the gap is sealed by using a sealant 8, and the elastic deformation space of the wall body, the constructional column 4 and the shear wall 1 is reserved in the mode, so that the structural safety and the integrity are ensured.
Specifically, the building block further comprises a sealant 8 which is coated between the buffer board 6 and the constructional column 4 and between the buffer board 6 and the wall 5.
Preferably, the sealant 8 is a silicone adhesive.
Preferably, the buffer plate 6 is a polystyrene plate.
Preferably, the construction post 4 has a rectangular cross-section and the wall 5 has a thickness equal to the thickness of the construction post 4.
The concrete implementation mode of the connecting structure of the wall body and the main body structure is as follows: fixedly connecting the open end of the tie bar 3 with a reinforcement cage of the shear wall 1, pouring to form the shear wall 1, embedding part of the tie bar 3 in the shear wall 1, and extending the closed end of the tie bar 3 outwards; fixing the reinforcing steel bar 31 at the closed end of the tie bar 3, pouring concrete at the position corresponding to the reinforcing steel bar 31 to form a constructional column 4, and embedding the closed end of the tie bar 3 and the reinforcing steel bar 31 in the constructional column 4; building a wall body 5 at the side face of the constructional column 4 far away from the shear wall 1 and at a set distance from the constructional column 4; filling a buffer plate 6 in a gap between the shear wall 1 and the constructional column 4, and plugging the gap between the buffer plate 6 and the wall body 5 and the gap between the buffer plate 6 and the constructional column 1 by using sealant 8; filling sealant 8 in gaps between the constructional column 4 and the floor slab 2 and between the wall 5 and the floor slab 2; the steel wire meshes 72 are fixed on the surfaces of the wall body 5 and the constructional column 4 by utilizing the U-shaped clamps 71, and then the decorative layer 7 is formed by plastering on the steel wire meshes 72, so that the surfaces of the wall body 5 and the constructional column 4 are flush, and the steel wire meshes 72 are embedded in the decorative layer 7.
The construction method of the connection structure of the wall body and the main body structure comprises the following steps: pouring concrete on the side part of the shear wall 1 to form a constructional column 4; building a filler wall 5 at the side of the constructional column 4 far away from the shear wall 1 and at a set distance from the constructional column 4; the buffer plate 6 is filled at a set interval between the shear wall 1 and the construction column 4, and the decorative layer 7 is formed by plastering the surfaces of the construction column 4 and the filler wall 5 so that the surface of the filler wall 5 and the surface of the construction column 4 are flush.
Furthermore, the shear wall also comprises a plurality of tie bars 3 which are embedded in the shear wall 1 at intervals and partially protrude out of the shear wall 1, and a plurality of steel bars 31 which are vertically connected with the protruding parts of the tie bars 3;
concrete is poured at a position corresponding to the reinforcing bar 31, and protruding portions of the reinforcing bar 31 and the tie bar 3 are buried in the construction column 4.
Further, the steel wire mesh 72 is attached to the surfaces of the constructional column 4 and the wall body 5, and the steel wire mesh 72 is fixed to the surfaces of the constructional column 4 and the wall body 5 through the U-shaped clamp 71;
and plastering is carried out on the steel wire mesh 72 to form the decorative layer 7, and the steel wire mesh 72 is embedded in the decorative layer 7.
Further, a floor slab 2 is formed on the top of the shear wall 1 in a pouring mode, and construction joints are formed between the tops of the constructional columns 4 and the wall body 5 and the floor slab 2;
and filling sealant 8 between the top of the constructional column 4 and the filler wall 5 and the floor slab 2 to fill the construction joints.
The concrete implementation mode of the connecting structure of the wall body and the main body structure is as follows: fixedly connecting the open end of the tie bar 3 with a reinforcement cage of the shear wall 1, pouring to form the shear wall 1, embedding part of the tie bar 3 in the shear wall 1, and extending the closed end of the tie bar 3 outwards; fixing the reinforcing steel bar 31 at the closed end of the tie bar 3, pouring concrete at the position corresponding to the reinforcing steel bar 31 to form a constructional column 4, and embedding the closed end of the tie bar 3 and the reinforcing steel bar 31 in the constructional column 4; building a wall body 5 at the side face of the constructional column 4 far away from the shear wall 1 and at a set distance from the constructional column 4; filling a buffer plate 6 in a gap between the shear wall 1 and the constructional column 4, and plugging the gap between the buffer plate 6 and the wall body 5 and the gap between the buffer plate 6 and the constructional column 1 by using sealant 8; filling sealant 8 in gaps between the constructional column 4 and the floor slab 2 and between the wall 5 and the floor slab 2; the steel wire meshes 72 are fixed on the surfaces of the wall body 5 and the constructional column 4 by utilizing the U-shaped clamps 71, and then the decorative layer 7 is formed by plastering on the steel wire meshes 72, so that the surfaces of the wall body 5 and the constructional column 4 are flush, and the steel wire meshes 72 are embedded in the decorative layer 7.
While the present invention has been described in detail and with reference to the accompanying drawings and examples, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.

Claims (10)

1. A connecting structure of a wall body and a main body structure is characterized by comprising,
the construction columns are attached to the side parts of the shear wall of the main body structure, the side surfaces, far away from the shear wall, of the construction columns are built to form the wall body, and an expansion joint is formed between the wall body and the construction columns;
the buffer plate is filled in the expansion joint; and
plastering forms a decorative layer on the surface of the wall body and the constructional column, so that the surface of the wall body and the surface of the constructional column are flush.
2. The connecting structure of the wall body and the main body structure as claimed in claim 1, further comprising a plurality of tie bars embedded at intervals in the shear wall and partially protruding out of the shear wall, wherein concrete is poured at positions corresponding to the tie bars to form the constructional column.
3. The structure for connecting a wall body and a main structure according to claim 2, further comprising a plurality of reinforcing bars vertically connected to the protruding portions of the tie bars, wherein the construction column is formed by casting concrete at positions corresponding to the reinforcing bars, and the reinforcing bars and the protruding portions of the tie bars are embedded in the construction column.
4. The connecting structure of the wall body and the main body structure as claimed in claim 1, further comprising a steel wire mesh attached to the surfaces of the constructional column and the wall body, wherein the steel wire mesh is fixed to the surfaces of the constructional column and the wall body through U-shaped clamps;
the decorative layer is formed by plastering on the surface of the steel wire mesh, so that the steel wire mesh is embedded in the decorative layer.
5. The wall and body structure connecting structure according to claim 1, wherein a floor slab is cast on the top of the shear wall;
the top of constructional column and wall body with be formed with the construction joint between the floor, just it has sealed glue to fill in the construction joint.
6. The wall to body construction connection of claim 1 further comprising sealant applied between said bumper and said structural columns and between said bumper and said wall.
7. A construction method of a connecting structure of a wall body and a main body structure according to claim 1, comprising the steps of:
pouring concrete on the side part of the shear wall to form a constructional column;
building the construction columns at the side surfaces far away from the shear wall and at the set intervals from the construction columns to form a wall body;
packing a buffer plate at a set interval between the shear wall and the construction column;
and plastering the construction columns and the surface of the wall body to form a decorative layer so that the surface of the wall body is flush with the surface of the construction columns.
8. The construction method of the connection structure of the wall body and the main body structure according to claim 7, further comprising a plurality of tie bars embedded at intervals in the shear wall and partially protruding out of the shear wall, and a plurality of reinforcing steel bars vertically connected to the protruding parts of the tie bars;
and pouring concrete at the position corresponding to the reinforcing steel bar to form a constructional column, and embedding the reinforcing steel bar and the protruding part of the tie bar into the constructional column.
9. The construction method of the connection structure of the wall body and the main body structure according to claim 8, further comprising a steel wire mesh attached to the surfaces of the constructional column and the wall body, wherein the steel wire mesh is fixed to the surfaces of the constructional column and the wall body through U-shaped clamps;
and plastering on the surface of the steel wire mesh to form the decorative layer, and embedding the steel wire mesh in the decorative layer.
10. The construction method of the connection structure of the wall body and the main body structure according to claim 9, wherein a floor slab is cast on the top of the shear wall, and a construction joint is formed between the construction column and the top of the wall body and the floor slab;
and filling sealant between the constructional columns and the top of the wall body and the floor slab so as to fill the construction joints.
CN202110510009.7A 2021-05-11 2021-05-11 Connecting structure of wall body and main body structure and construction method thereof Pending CN113202206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110510009.7A CN113202206A (en) 2021-05-11 2021-05-11 Connecting structure of wall body and main body structure and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110510009.7A CN113202206A (en) 2021-05-11 2021-05-11 Connecting structure of wall body and main body structure and construction method thereof

Publications (1)

Publication Number Publication Date
CN113202206A true CN113202206A (en) 2021-08-03

Family

ID=77030742

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110510009.7A Pending CN113202206A (en) 2021-05-11 2021-05-11 Connecting structure of wall body and main body structure and construction method thereof

Country Status (1)

Country Link
CN (1) CN113202206A (en)

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