A secondary structure wall system and a construction method thereof

Abstract

The application provides a secondary structure wall system and a construction method thereof, and solves the problems of complex construction, high technical requirements for construction personnel and long construction period of the existing secondary structure wall. The prefabricated wall structure (including prefabricated middle wall, prefabricated corner wall and outer window wall) is prefabricated in a factory, and a steel skeleton net serving as a part of a main support of the wall is directly embedded in the prefabricated wall. During construction, if the wall is a general wall for construction of a secondary structure between building layers, the steel bars need not be lowered into the outer wall and the inner wall again, so that the construction steps of the secondary structure wall are simplified, the technical requirements for the construction personnel are reduced, and the construction period is greatly shortened. If the strength of the wall needs to be improved in special building construction, the steel bar support cage can be lowered into the prefabricated wall structure again to improve the strength of the formed wall.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a secondary structural wall system and its construction method. Background Technology

[0002] In modern construction, to pursue construction efficiency, secondary structure construction between building floors is only carried out after the primary structure (referring to the load-bearing components of the main structure) is completed. Secondary structures are non-load-bearing structures relative to the load-bearing primary structure, such as enclosure structures, including structural columns, lintels, waterproofing beams, parapet walls, copings, infill walls, partition walls, etc.

[0003] The construction procedures for the secondary structure are as follows: (1) Mark out the wall edge lines, door and window opening lines, and the 1.0-meter building elevation control line inside the room. (2) Tie the reinforcing bars of the masonry structural columns. (3) Construct the walls according to the construction drawings. (4) After the wall mortar has set to meet the requirements, support the formwork for the secondary structure such as lintels, ring beams, and structural columns. (5) Tie the reinforcing bars of the lintels and ring beams, and prepare for pouring after acceptance. (6) Moisten the concrete with water before pouring, and then vibrate it to make it compact. (7) Remove the formwork for the structural columns when the corners are no longer chipped.

[0004] The construction of current secondary structure wall systems is quite complex and requires high technical skills from construction workers. At the same time, due to severe aging, there is a shortage of construction workers, resulting in a long construction period. Summary of the Invention

[0005] To address the problems of complex construction, high technical requirements for construction personnel, and long construction cycles in existing secondary structural walls, this invention proposes a secondary structural wall system and its construction method.

[0006] The technical solution of the present invention is: a secondary structural wall system, comprising several prefabricated intermediate walls and prefabricated corner walls located on the left and right sides of the prefabricated intermediate walls, the bottom of the prefabricated intermediate walls and the prefabricated corner walls being used for installation on the lower ground, and the prefabricated corner walls being used for installation on the main column;

[0007] Both the precast intermediate wall and the precast corner wall include an outer wall and an inner wall spaced apart. Both the outer wall and the inner wall include a cement mortar board and a steel reinforcement mesh embedded in the cement mortar board. An intermediate connecting structure is provided between the outer wall and the inner wall. The front end of the intermediate connecting structure is fixedly connected to the steel reinforcement mesh in the outer wall, and the rear end of the intermediate connecting structure is fixedly connected to the steel reinforcement mesh in the inner wall.

[0008] The prefabricated corner wall includes a second outer wall and a second inner wall spaced apart front and back. The width of the second outer wall is greater than that of the second inner wall. One end of the second outer wall and the second inner wall are flush with each other front and back. The second outer wall and the second inner wall are connected by an intermediate connecting structure. One end of the second inner wall abuts against the side of the main column, and the rear of the second outer wall abuts against the other side of the main column. The second outer wall and the main column are detachably connected.

[0009] The left and right sides of the precast intermediate wall and the side of the precast corner wall away from the main column are provided with socket connection structure. Adjacent precast intermediate walls and precast intermediate walls and precast corner walls are connected by socket connection structure, and the socket connection structure can form a grout leakage prevention structure after connection.

[0010] After the precast corner wall and the precast intermediate wall are connected, a casting cavity with an upper opening and internal connection is formed. The main column is used to seal the left and right openings of the casting cavity, and the lower ground is used to seal the lower opening of the casting cavity.

[0011] Preferably, the exterior wall and the interior wall also include fiberglass mesh fabrics respectively located on the front and rear sides of the steel reinforcement mesh, with the fiberglass mesh fabrics embedded in the cement mortar board.

[0012] Preferably, the steel reinforcement mesh includes steel reinforcement meshes spaced apart in the front and back, the steel reinforcement meshes are crisscrossing grid structures, and transverse bars extending in the front and back direction are welded between two steel reinforcement meshes.

[0013] Preferably, the intermediate connection structure includes horizontal flat irons installed on the upper and lower sides of the outer wall and the inner wall. The ends of the horizontal flat irons are welded to the steel reinforcement mesh. The upper horizontal flat irons are used to connect to the beam through expansion bolts or rebar, and the lower horizontal flat irons are used to connect to the concrete structure of the indoor floor through expansion bolts or rebar.

[0014] The intermediate connecting structure also includes vertical flat iron located between the horizontal flat irons on the upper and lower sides, and vertical flat irons are provided on both the left and right sides of the outer wall and the inner wall.

[0015] Preferably, the left and right width of the exterior wall is less than or equal to .m, and the left and right width of the interior wall is less than or equal to the left and right width of the exterior wall.

[0016] Preferably, the socket connection structure includes a groove plate and a socket plate respectively fixed on the left and right sides of the inner wall and the outer wall;

[0017] One side of the vertical flat iron is flush with the root of the channel plate, and the other side of the vertical flat iron is flush with the end of the insert plate away from the channel plate.

[0018] The flat iron is provided with screw holes that are open to the left and right. When the prefabricated intermediate wall, corner wall and exterior window wall are spliced ​​together, the two adjacent flat iron pieces located at the splice joint are fixedly connected by bolts that pass through the screw holes.

[0019] After two adjacent flat iron blocks are fixedly connected by bolts, the insert plate is inserted into the inside of the trough plate, and the insert plate and the trough plate form a grout-proof structure.

[0020] Preferably, an L-shaped steel bar hook is fixedly provided on the rear side of the second outer wall, and the steel bar hook is located on the outer side of the second inner wall; steel bar rings are fixedly provided on the two adjacent sides of the main column facing the second outer wall, and the steel bar hooks are used to insert into the steel bar rings.

[0021] Preferably, it also includes an exterior window wall, which includes a bottom wall of the exterior window, a left wall of the exterior window on the left side of the bottom wall of the exterior window, and a right wall of the exterior window on the right side of the bottom wall of the exterior window. The left wall of the exterior window and the right wall of the exterior window are mirror-symmetrical structures, and the top of the left wall of the exterior window and the right wall of the exterior window are higher than the top of the bottom wall of the exterior window.

[0022] The right wall of the exterior window is open at both the top and bottom and has an opening on the right. The internal structure of the right wall of the exterior window is the same as the internal structure of the exterior wall. The middle of the left side of the right wall of the exterior window is recessed to the right to form a groove. The groove is used to place the window frame and block thermal bridges.

[0023] Horizontal flat irons are provided on both the upper and lower sides of the right side wall of the exterior window, and vertical flat irons are provided at intervals on the upper and lower sides of the right side wall of the exterior window. A socket connection structure for connecting with the precast intermediate wall is provided on the right side of the right side wall of the exterior window.

[0024] Preferably, the bottom wall of the exterior window includes a third inner wall and a third outer wall spaced apart front and back. The top of the third inner wall is higher than the top of the third outer wall. A sixth horizontal flat iron is fixedly provided on both the upper and lower sides of the rear of the third outer wall. A vertical flat iron is fixedly provided at the rear of the third outer wall. The rear ends of the sixth horizontal flat iron and the vertical flat iron are fixedly connected to the third inner wall.

[0025] The top of the third outer wall and the sixth horizontal flat iron on the upper side is fixed with a concrete insulation structure. The inside of the concrete insulation structure is filled with insulation material. The top surface of the concrete insulation structure is an inclined surface from back to front and from top to bottom.

[0026] A window sill coping groove is formed between the concrete insulation structure and the upper part of the third inner wall. The window sill coping groove is an open-top structure that is transparent on both sides.

[0027] The flat iron on the right side of the wall at the bottom of the exterior window is used to fix it to the left side of the wall on the right side of the exterior window using expansion bolts, and the flat iron on the left side of the wall at the bottom of the exterior window is used to fix it to the right side of the wall on the left side of the exterior window using expansion bolts.

[0028] A construction method for a secondary structural wall system includes the following steps: S1~ Based on the BIM architectural design 3D drawing, when pouring the main column, pre-embed steel rings at the corresponding positions on the main column;

[0029] S2~Based on the BIM architectural design 3D drawing, prefabricate the intermediate walls, corner walls, bottom walls of exterior windows, left walls of exterior windows, and right walls of exterior windows in the factory;

[0030] S3~ During the construction of the interior walls between floors, according to the BIM architectural design 3D drawing, drill all the first installation holes on the ground floor corresponding to the screw hole positions on the horizontal flat iron.

[0031] S4~ Assemble the precast corner wall onto the main column, insert the expansion bolts into the screw holes of the horizontal flat iron at the bottom of the precast corner wall and the first installation hole in the lower floor, and fix the horizontal flat iron at the bottom of the corner wall to the lower floor through the expansion bolts. Drill holes and install expansion bolts on the vertical flat iron near the main column and the main column at the same time, so that the vertical flat iron near the main column is fixedly connected to the main column through the expansion bolts.

[0032] S5~ Splice the precast intermediate wall and the precast corner wall at the end away from the main column. The precast intermediate wall and the precast corner wall are connected by bolts to the vertical flat irons that are close to each other. The horizontal flat iron at the bottom of the precast intermediate wall is connected to the lower ground by expansion bolts.

[0033] S6~Based on the construction methods of S4~S5 above, install the prefabricated intermediate walls and prefabricated corner walls in sequence along the length of the wall until the reserved window is installed;

[0034] S7~ Transport the left wall of the exterior window to the reserved window location, and bolt the flat iron on the left wall of the exterior window to the flat iron adjacent to the precast intermediate wall.

[0035] S8~ Transport the bottom wall of the exterior window to the reserved window location, fix the vertical flat iron on the left side of the bottom wall of the exterior window to the right side of the left side wall of the exterior window with expansion bolts, and connect the horizontal flat iron at the bottom of the bottom wall of the exterior window to the lower ground with expansion bolts.

[0036] S9~ Transport the right side wall of the exterior window to the reserved window location, bolt the flat iron on the right side of the right side wall of the exterior window to the flat iron adjacent to the precast intermediate wall, and fix the left side of the right side wall of the exterior window to the flat iron on the right side of the bottom wall of the exterior window using expansion bolts.

[0037] S10~ Due to the obstruction of the main column and the right and left walls of the exterior window, the interior space of the four walls after construction is completed forms five independent pouring cavities and one bottom pouring cavity of the exterior window located inside the bottom wall of the exterior window. Concrete is poured from the top into the pouring cavity until it is flush with the top of the precast intermediate wall.

[0038] S11~ Pour concrete into the cavity from the top to the bottom of the outer window until it is flush with the sixth horizontal flat iron at the top of the bottom wall of the outer window. Then put the steel bars into the window sill capping groove and pour concrete into the window sill capping groove again to form a reinforced concrete window sill capping structure. The top of the window sill capping is lower than the top of the inner side of the concrete insulation structure so that a bottom groove for installing the window frame is formed above the window sill capping.

[0039] S12~ Welding steel bars onto the horizontal flat iron at the top of the precast intermediate wall and precast corner wall to form rebar anchors embedded in the upper floor slab during the construction of the upper floor slab.

[0040] Advantages of the present invention: (1) The prefabricated wall structure of the present invention (including prefabricated intermediate wall, prefabricated corner wall and exterior window wall) is prefabricated in the factory, and the steel reinforcement mesh, which is part of the main support of the wall, is directly embedded in the prefabricated wall. During construction, if it is used as a general wall for the secondary structure between building floors, there is no need to put steel reinforcement in the exterior wall and interior wall again, which simplifies the construction steps of the secondary structure wall, reduces the high technical requirements for construction personnel, and can greatly reduce the construction cycle; if it is necessary to increase the strength of the wall in the construction of special buildings, steel reinforcement support cages can be put in the prefabricated wall structure again to increase the strength of the formed wall.

[0041] (2) When constructing the walls of the secondary structure between building floors, the precast walls are transported directly to the construction site. The construction workers assemble the precast intermediate walls, corner walls and exterior window walls in sequence and fix them to the ground. Due to the obstruction of the main column, the completed wall forms an open and connected pouring cavity. When pouring concrete from the top into the pouring cavity, the concrete can flow left and right in the pouring cavity, which greatly reduces the number of concrete pouring times and pouring points, and improves construction efficiency.

[0042] (3) After the concrete is poured and solidified, it can not only serve as an internal support for the precast wall, but also fix the adjacent assembled precast walls again, so that the precast walls are connected as one, and the upper limit of the stress of the formed wall is increased. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the installation structure of the intermediate wall in Example 1;

[0045] Figure 2 for Figure 1 A top-view diagram of the installation structure (I);

[0046] Figure 3 This is a schematic diagram of the installation structure of the corner wall in Example 1 (external view).

[0047] Figure 4 This is a schematic diagram of the installation structure of the corner wall in Example 1 (internal view).

[0048] Figure 5 for Figure 4 A top-down view of the installation structure;

[0049] Figure 6 This is a structural schematic diagram of the right wall of the exterior window in Example 1;

[0050] Figure 7 for Figure 6 A top-down view of the structure;

[0051] Figure 8 This is a schematic diagram of the structure of the bottom wall of the exterior window in Example 1;

[0052] Figure 9 This is a schematic diagram of the internal structure of the exterior wall in Example 1;

[0053] Figure 10 for Figure 1 Enlarged view of the structure at point A in the image;

[0054] In the diagram, 1. Cast-in-place intermediate wall; 2. Precast intermediate wall; 3. First outer wall; 4. First inner wall; 5. First channel plate; 6. First insert plate; 7. First horizontal flat iron; 8. Second horizontal flat iron; 9. Vertical flat iron; 10. Main column; 11. Precast corner wall; 12. Second outer wall; 13. Second inner wall; 14. Second insert plate; 15. Third horizontal flat iron; 16. Fourth horizontal flat iron; 17. Rebar hook; 1 8. Reinforcing steel ring; 19. Right side wall of exterior window; 20. Third insert plate; 21. Fifth horizontal flat iron; 22. Groove; 23. Bottom wall of exterior window; 24. Third inner wall; 25. Third outer wall; 26. Sixth horizontal flat iron; 27. Concrete insulation structure; 28. Insulation material; 29. ​​Window sill coping groove; 30. Reinforcing steel mesh; 31. Horizontal reinforcement; 32. Fiberglass mesh; 33. Internal support structure; 34. External protective structure. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Example 1: A secondary structural wall system includes several prefabricated intermediate walls 2 and prefabricated corner walls 11 located on the left and right sides of the prefabricated intermediate walls 2. The bottoms of the prefabricated intermediate walls 2 and the prefabricated corner walls 11 are used to be installed on the lower ground, and the prefabricated corner walls 11 are used to be installed on the main column 10.

[0057] Both the precast intermediate wall 2 and the precast corner wall 11 include an outer wall and an inner wall spaced apart. Both the outer wall and the inner wall include a cement mortar board and a steel reinforcement mesh embedded in the cement mortar board. An intermediate connecting structure is provided between the outer wall and the inner wall. The front end of the intermediate connecting structure is fixedly connected to the steel reinforcement mesh in the outer wall, and the rear end of the intermediate connecting structure is fixedly connected to the steel reinforcement mesh in the inner wall.

[0058] The specific internal structure of the exterior and interior walls, such as Figure 1 , Figure 2 and Figure 9 As shown, taking the precast intermediate wall 2 as an example, the precast intermediate wall 2 includes a first outer wall 3 and a first inner wall 4 arranged at intervals. The first outer wall 3 includes a cement mortar board and a steel reinforcement mesh built into the cement mortar board. The first inner wall 4 has the same structure as the first outer wall 3.

[0059] The steel reinforcement mesh includes steel mesh 30 arranged at intervals in the front and back. The steel mesh 30 has a crisscrossing grid structure, and transverse bars 31 extending in the front and back direction are welded between two steel meshes 30.

[0060] In order to improve the fire resistance, heat insulation, sound insulation and insulation effect of the wall, the first outer wall 3 and the first inner wall 4 also include fiberglass mesh 32 respectively set on the front and rear sides of the steel reinforcement mesh, and the fiberglass mesh 32 is embedded in the cement mortar board.

[0061] The cement mortar board shown in this embodiment includes an inner support structure 33 filled within a steel reinforcement mesh and an outer protective structure 34 wrapped around the outside of the steel reinforcement mesh.

[0062] An intermediate connecting structure is provided between the first outer wall 3 and the first inner wall 4, such as... Figure 1 , Figure 2 and Figure 9 As shown, the intermediate connection structure between the first outer wall 3 and the first inner wall 4 includes a first horizontal flat iron 7 and a second horizontal flat iron 8 horizontally arranged on the upper and lower sides of the outer wall and the inner wall. The ends of the first horizontal flat iron 7 and the second horizontal flat iron 8 are welded to the steel reinforcement mesh on the front and rear sides, respectively. The upper first horizontal flat iron 7 and the second horizontal flat iron 8 are used to connect to the beam by expansion bolts or rebar, and the lower first horizontal flat iron 7 and the second horizontal flat iron 8 are used to connect to the concrete structure of the indoor ground by expansion bolts or rebar.

[0063] like Figure 1 As shown, after the precast intermediate wall 2 is filled with concrete, it forms as follows: Figure 1 The intermediate wall 1 shown is cast in place.

[0064] The intermediate connecting structure also includes vertical flat iron 9 located between the horizontal flat irons on the upper and lower sides, and vertical flat iron 9 is provided on both the left and right sides of the outer wall and the inner wall.

[0065] The intermediate connecting structure is used to enhance the structural strength of the precast wall. At the same time, the vertical flat iron 9 installed on the side also provides a point of force for construction workers to move the precast wall.

[0066] like Figure 3 , Figure 4 and Figure 5 As shown, two prefabricated corner walls 11 that are perpendicular to each other are installed on the main column 10 at the corner.

[0067] The prefabricated corner wall 11 includes a second outer wall 12 and a second inner wall 13 spaced apart front and back. The width of the second outer wall 12 is greater than that of the second inner wall 13. One end of the second outer wall 12 and the second inner wall 13 are flush with each other front and back. The second outer wall 12 and the second inner wall 13 are connected by an intermediate connecting structure. One end of the second inner wall 13 abuts against the side of the main column 10, and the rear part of the second outer wall 12 abuts against the other side of the main column 10. The second outer wall 12 and the main column 10 are detachably connected.

[0068] On the two adjacent sides of the main column 10 facing the second outer wall 12, there are fixed steel rings 18, and steel hooks 17 are used to insert into the steel rings 18.

[0069] The second outer wall 12 and the second inner wall 13 are connected by the same intermediate connection structure. Specifically, the intermediate connection structure between the second outer wall 12 and the second inner wall 13 includes a third horizontal flat iron 15 and a fourth horizontal flat iron 16 arranged at left and right intervals, with two of each of the third horizontal flat iron 15 and the fourth horizontal flat iron 16 arranged vertically.

[0070] Multiple vertical flat irons 9 are provided vertically and vertically between the two third horizontal flat irons 15 and between the two fourth horizontal flat irons 16.

[0071] It also includes an exterior window wall, which includes a bottom wall 23. A left-side wall is provided on the left side of the bottom wall 23, and a right-side wall 19 is provided on the right side of the bottom wall 23. The left-side wall and the right-side wall 19 are mirror-symmetrical structures. The tops of the left-side wall and the right-side wall 19 are higher than the top of the bottom wall 23.

[0072] like Figure 6 and Figure 7 As shown, the right wall 19 of the exterior window is a structure that is open at both the top and bottom and has an opening on the right. The internal structure of the right wall 19 of the exterior window is the same as the internal structure of the exterior wall. The middle of the left side of the right wall 19 of the exterior window is recessed to the right by 3cm to form a groove 22. The groove 22 is used to place the window frame and block thermal bridges.

[0073] The right side wall 19 of the exterior window is provided with horizontal flat iron on both the upper and lower sides, and vertical flat iron 9 is provided at intervals on the upper and lower sides of the right side wall 19 of the exterior window. The right side of the right side wall 19 of the exterior window is provided with a socket connection structure for connecting with the prefabricated intermediate wall 2.

[0074] like Figure 8As shown, the bottom wall 23 of the outer window includes a third inner wall 24 and a third outer wall 25 arranged at intervals. The top of the third inner wall 24 is higher than the top of the third outer wall 25. A sixth horizontal flat iron 26 is fixedly installed on both the upper and lower sides of the rear of the third outer wall 25. A vertical flat iron 9 is fixedly installed at the rear of the third outer wall 25. The rear ends of the sixth horizontal flat iron 26 and the vertical flat iron 9 are fixedly connected to the third inner wall 24.

[0075] The top of the third outer wall 25 and the sixth horizontal flat iron 26 on the upper side are fixed with a concrete insulation structure 27. The interior of the concrete insulation structure 27 is filled with insulation material 28. The top surface of the concrete insulation structure 27 is an inclined surface from back to front and from top to bottom.

[0076] A window sill top groove 29 is formed between the concrete insulation structure 27 and the upper part of the third inner wall 24. The window sill top groove 29 is an open structure at the top and open to the left and right.

[0077] The flat iron 9 on the right side of the bottom wall 23 of the exterior window is used to fix and connect with the left side of the right wall 19 of the exterior window by expansion bolts, and the flat iron 9 on the left side of the bottom wall 23 of the exterior window is used to fix and connect with the right side of the left wall of the exterior window by expansion bolts.

[0078] The left and right sides of the precast intermediate wall 2, the side of the precast corner wall 11 away from the main column 10, and the left and right sides of the exterior window wall are all provided with socket connection structures. Adjacent precast intermediate walls 2, precast intermediate walls 2, precast corner walls 11, and precast intermediate walls 2 and exterior window walls are all connected by socket connection structures, and the socket connection structures can form a grout-proof structure after connection.

[0079] Specifically, such as Figure 10 As shown, taking the prefabricated intermediate wall 2 as an example, the socket connection structure includes a groove plate and an insert plate respectively fixed on the left and right sides of the inner wall and the outer wall, and the insert plate is used to be inserted into the inner side of the groove plate.

[0080] One side of the vertical flat iron 9 is flush with the root of the groove plate, and the other side of the vertical flat iron 9 is flush with the end of the insert plate away from the groove plate.

[0081] The flat iron 9 has screw holes that are open on both sides. When the prefabricated intermediate wall 2, corner wall and exterior window wall are spliced ​​together, the two adjacent flat iron pieces 9 located at the splice joint are fixedly connected by bolts that pass through the screw holes.

[0082] The aforementioned insert plates include a first insert plate 6 located at the right end of the precast intermediate wall 2, a second insert plate 14 located at the end of the precast corner wall 11 away from the main column 10, and a third insert plate 20 located on the right side of the right wall 19 of the exterior window and on the left side of the left wall of the exterior window.

[0083] The aforementioned grooved plate includes a first grooved plate 5 located at the left end of the precast intermediate wall 2.

[0084] After the precast corner wall 11 and the precast intermediate wall 2 are connected, a casting cavity with an upper opening and internal communication is formed. The main column 10 is used to block the left and right openings of the casting cavity, and the lower ground is used to block the lower opening of the casting cavity.

[0085] To facilitate the bolt connection of the upright flat iron 9 when splicing the intermediate wall 2 and the corner wall, in this embodiment, the left and right width of the outer wall is less than or equal to 0.3m, and the left and right width of the inner wall is less than or equal to the left and right width of the outer wall.

[0086] A construction method for a secondary structural wall system, characterized by the following steps: S1~ Based on the BIM architectural design three-dimensional drawing, when pouring the main column 10, pre-embed steel rings 18 at the corresponding positions on the main column 10.

[0087] S2~Based on the BIM architectural design 3D drawing, prefabricate the intermediate wall 2, corner wall 11, bottom wall of the exterior window 23, left wall of the exterior window and right wall of the exterior window 19 in the factory.

[0088] S3~ During the construction of the interior walls between floors, according to the BIM architectural design 3D drawing, drill all the first installation holes on the lower floor corresponding to the screw hole positions on the horizontal flat iron.

[0089] S4~ Assemble the precast corner wall 11 onto the main column 10. Insert the expansion bolts into the screw holes of the horizontal flat iron at the bottom of the precast corner wall 11 and the first mounting hole in the lower floor. Fix the horizontal flat iron at the bottom of the corner wall 11 to the lower floor using the expansion bolts. Simultaneously drill holes and install expansion bolts on the vertical flat iron 9 near the main column 10 and the main column 10, so that the vertical flat iron 9 near the main column 10 is fixedly connected to the main column 10 using the expansion bolts.

[0090] S5~ The precast intermediate wall 2 and the precast corner wall 11 are spliced ​​together at the end away from the main column 10. The precast intermediate wall 2 and the precast corner wall 11 are fixedly connected by bolts to the vertical flat iron 9 close to each other. The horizontal flat iron at the bottom of the precast intermediate wall 2 is fixedly connected to the lower ground by expansion bolts.

[0091] S6~Based on the construction methods of S4~S5 above, install the precast intermediate wall 2 and the precast corner wall 11 along the length of the wall in sequence until the reserved window is installed.

[0092] S7~ Transport the left side wall of the exterior window to the reserved window location, and bolt the flat iron 9 on the left side wall of the exterior window to the flat iron 9 adjacent to the precast intermediate wall 2.

[0093] S8~ Transport the bottom wall 23 of the outer window to the reserved window location, fix the vertical flat iron 9 on the left side of the bottom wall 23 of the outer window to the right side of the left wall of the outer window with expansion bolts, and connect the horizontal flat iron at the bottom of the bottom wall 23 of the outer window to the lower ground with expansion bolts.

[0094] S9~ Transport the right side wall 19 of the exterior window to the reserved window location, bolt the flat iron 9 on the right side of the right side wall 19 of the exterior window to the flat iron 9 adjacent to the precast intermediate wall 2, and fix the left side of the right side wall 19 of the exterior window to the flat iron 9 on the right side of the bottom wall 23 of the exterior window using expansion bolts.

[0095] S10~ Due to the obstruction of the main column 10, the right wall 19 of the outer window, and the left wall of the outer window, the internal space of the four walls after construction is completed forms five independent pouring cavities and an outer window bottom pouring cavity located inside the outer window bottom wall 23. Concrete is poured from the top into the pouring cavity until it is flush with the top of the precast intermediate wall 2.

[0096] S11~ Pour concrete into the cavity from the top to the bottom of the outer window until it is flush with the sixth horizontal flat iron 26 at the top of the bottom wall 23 of the outer window. Then, put steel bars into the window sill capping groove 29 and pour concrete into the window sill capping groove 29 again to form a reinforced concrete window sill capping structure. The top of the window sill capping is lower than the top of the inner side of the concrete insulation structure 27 so that a bottom groove for installing the window frame is formed above the window sill capping.

[0097] S12~ Weld steel bars onto the horizontal flat iron on the upper part of the precast intermediate wall 2 and the precast corner wall 11 to form a rebar embedded in the upper floor slab during the construction of the upper floor slab.

[0098] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A secondary structural wall system, characterized in that: It includes several prefabricated intermediate walls (2) and prefabricated corner walls (11) located on the left and right sides of the prefabricated intermediate walls (2). The bottom of the prefabricated intermediate walls (2) and the prefabricated corner walls (11) are used to be installed on the lower ground, and the prefabricated corner walls (11) are used to be installed on the main column (10). The precast intermediate wall (2) and the precast corner wall (11) both include an outer wall and an inner wall that are spaced apart. Both the outer wall and the inner wall include a cement mortar board and a steel reinforcement mesh built into the cement mortar board. An intermediate connection structure is provided between the outer wall and the inner wall. The front end of the intermediate connection structure is fixedly connected to the steel reinforcement mesh in the outer wall, and the rear end of the intermediate connection structure is fixedly connected to the steel reinforcement mesh in the inner wall. The prefabricated corner wall (11) includes a second outer wall (12) and a second inner wall (13) spaced apart front and back. The width of the second outer wall (12) is greater than that of the second inner wall (13). One end of the second outer wall (12) and the second inner wall (13) are flush with each other. The second outer wall (12) and the second inner wall (13) are connected by an intermediate connecting structure. One end of the second inner wall (13) abuts against the side of the main column (10). The rear part of the second outer wall (12) abuts against the other side of the main column (10). The second outer wall (12) and the main column (10) are detachably connected. The left and right sides of the precast intermediate wall (2) and the side of the precast corner wall (11) away from the main column (10) are provided with socket connection structures. The adjacent precast intermediate walls (2) and the precast intermediate walls (2) and the precast corner walls (11) are connected by socket connection structures, and the socket connection structures can form a grout leakage prevention structure after connection. After the precast corner wall (11) and the precast intermediate wall (2) are connected, a casting cavity with an upper opening and internal communication is formed. The main column (10) is used to block the left and right openings of the casting cavity, and the lower ground is used to block the lower opening of the casting cavity. It also includes an exterior window wall, which includes the exterior window bottom wall (23). The exterior window bottom wall (23) has a left exterior window wall on the left side and an exterior window right wall (19) on the right side. The exterior window left wall and the exterior window right wall (19) are mirror symmetrical structures. The top of the exterior window left wall and the exterior window right wall (19) is higher than the top of the exterior window bottom wall (23). The right wall of the exterior window (19) is a structure that is open at the top and bottom and open to the right. The internal structure of the right wall of the exterior window (19) is the same as the internal structure of the exterior wall. The middle of the left side of the right wall of the exterior window (19) is recessed to the right to form a groove (22). The groove (22) is used to place the window frame and block thermal bridges. The right side wall (19) of the exterior window is provided with horizontal flat iron on both the upper and lower sides, and vertical flat iron (9) is provided at intervals on the upper and lower sides of the right side wall (19). The right side wall (19) of the exterior window is provided with a socket connection structure for connecting with the prefabricated intermediate wall (2).

2. The secondary structural wall system as described in claim 1, characterized in that: The exterior and interior walls also include fiberglass mesh (32) set on the front and rear sides of the steel reinforcement mesh, respectively, with the fiberglass mesh (32) embedded in the cement mortar board.

3. The secondary structural wall system as described in claim 2, characterized in that: The steel reinforcement mesh includes steel reinforcement mesh (30) spaced apart in the front and back. The steel reinforcement mesh (30) is a grid structure with crisscrossing lines. A transverse bar (31) extending in the front and back direction is welded between two steel reinforcement meshes (30).

4. A secondary structural wall system as described in any one of claims 1-3, characterized in that: The intermediate connection structure includes horizontal flat irons installed on the upper and lower sides of the outer and inner walls. The ends of the horizontal flat irons are welded to the steel reinforcement mesh. The upper horizontal flat irons are used to connect to the beams by expansion bolts or rebars, and the lower horizontal flat irons are used to connect to the concrete structure of the indoor floor by expansion bolts or rebars. The intermediate connecting structure also includes a vertical flat iron (9) located between the horizontal flat irons on the upper and lower sides, and vertical flat irons (9) are provided on both the left and right sides of the outer wall and the inner wall.

5. A secondary structural wall system as described in claim 4, characterized in that: The left and right width of the exterior wall is less than or equal to 0.3m, and the left and right width of the interior wall is less than or equal to the left and right width of the exterior wall.

6. A secondary structural wall system as described in claim 5, characterized in that: The socket connection structure includes a grooved plate and a socket plate that are respectively fixed on the left and right sides of the inner wall and the outer wall; One of the vertical flat iron (9) is flush with the root of the slot plate, and the other vertical flat iron (9) is flush with the end of the insert plate away from the slot plate. The flat iron (9) has screw holes that are open to the left and right. When the prefabricated intermediate wall (2), corner wall and outer window wall are spliced ​​together, the two adjacent flat irons (9) located at the splice joint are fixedly connected by bolts that pass through the screw holes. When two adjacent flat iron pieces (9) are fixedly connected by bolts, the insert plate is inserted into the inner side of the trough plate, and the insert plate and the trough plate form a grout leakage prevention structure.

7. A secondary structural wall system as described in claim 1 or 6, characterized in that: An L-shaped steel bar hook (17) is fixedly provided on the rear side of the second outer wall (12). The steel bar hook (17) is located on the outside of the second inner wall (13). The main column (10) is fixedly provided with steel bar rings (18) on two adjacent sides facing the second outer wall (12). The steel bar hook (17) is used to insert into the steel bar ring (18).

8. A secondary structural wall system as described in claim 1, characterized in that: The bottom wall of the exterior window (23) includes a third inner wall (24) and a third outer wall (25) spaced apart. The top of the third inner wall (24) is higher than the top of the third outer wall (25). The upper and lower sides of the rear of the third outer wall (25) are fixed with a sixth horizontal flat iron (26). The rear of the third outer wall (25) is fixed with a vertical flat iron (9). The rear ends of the sixth horizontal flat iron (26) and the vertical flat iron (9) are fixedly connected to the third inner wall (24). The top of the third outer wall (25) and the sixth horizontal flat iron (26) on the upper side is fixed with a concrete insulation structure (27), and the interior of the concrete insulation structure (27) is provided with insulation material (28). The top surface of the concrete insulation structure (27) is an inclined surface from back to front and from top to bottom. A window sill top groove (29) is formed between the concrete insulation structure (27) and the upper part of the third inner wall (24). The window sill top groove (29) is an open structure at the top and open to the left and right. The flat iron (9) on the right side of the bottom wall (23) of the exterior window is used to be fixedly connected to the left side of the right wall (19) of the exterior window by expansion bolts, and the flat iron (9) on the left side of the bottom wall (23) of the exterior window is used to be fixedly connected to the right side of the left wall of the exterior window by expansion bolts.

9. A construction method for a secondary structural wall system according to claim 8, characterized in that, The steps include: S1~ According to the BIM architectural design three-dimensional drawing, when pouring the main column (10), pre-embed steel rings (18) in the corresponding parts of the main column (10); S2~ Based on the BIM architectural design three-dimensional drawing, prefabricate the intermediate wall (2), corner wall (11), bottom wall of the exterior window (23), left wall of the exterior window and right wall of the exterior window (19) in the factory. S3~ During the construction of the interior walls between floors, according to the BIM architectural design 3D drawing, drill all the first installation holes on the ground floor corresponding to the screw hole positions on the horizontal flat iron. S4~ Assemble the precast corner wall (11) onto the main column (10), insert the expansion bolts into the screw holes of the horizontal flat iron at the bottom of the precast corner wall (11) and the first mounting hole in the lower floor, and fix the horizontal flat iron at the bottom of the corner wall (11) to the lower floor through the expansion bolts, drill holes and install expansion bolts on the vertical flat iron (9) near the main column (10) and the main column (10) at the same time, so that the vertical flat iron (9) near the main column (10) is fixedly connected to the main column (10) through the expansion bolts; S5~ Splice the precast intermediate wall (2) and the precast corner wall (11) at the end away from the main column (10). The precast intermediate wall (2) and the precast corner wall (11) are connected by bolts to the vertical flat iron (9) close to each other. The horizontal flat iron at the bottom of the precast intermediate wall (2) is connected to the lower ground by expansion bolts. S6~Based on the construction methods of S4~S5 above, along the length of the wall, install the precast intermediate wall (2) and the precast corner wall (11) in sequence until the reserved window is installed; S7~ Transport the left side wall of the exterior window to the reserved window location, and bolt the flat iron (9) on the left side wall of the exterior window to the flat iron (9) adjacent to the prefabricated intermediate wall (2); S8~ Transport the bottom wall of the outer window (23) to the reserved window, fix the vertical flat iron (9) on the left side of the bottom wall of the outer window (23) to the right side of the left side wall of the outer window with expansion bolts, and connect the horizontal flat iron at the bottom of the bottom wall of the outer window (23) to the lower ground with expansion bolts. S9~ Transport the right side wall of the outer window (19) to the reserved window, bolt the flat iron (9) on the right side of the right side wall of the outer window (19) to the flat iron (9) adjacent to the prefabricated middle wall (2), and fix the left side of the right side wall of the outer window (19) to the flat iron (9) on the right side of the bottom wall of the outer window (23) with expansion bolts. S10~ Due to the obstruction of the main column (10) and the right wall (19) and left wall of the outer window, the interior space of the four walls after construction is completed forms five independent pouring cavities and an outer window bottom pouring cavity located inside the outer window bottom wall (23). Concrete is poured from the top into the pouring cavity until it is flush with the top of the precast intermediate wall (2). S11~ Pour concrete into the cavity from the top to the bottom of the outer window until it is flush with the sixth horizontal flat iron (26) at the top of the bottom wall (23) of the outer window. Then put the steel bar into the window sill capping groove (29) and pour concrete into the window sill capping groove (29) again to form a reinforced concrete window sill capping. The top of the window sill capping is lower than the top of the inner side of the concrete insulation structure (27) so that a bottom groove for installing the window frame is formed above the window sill capping. S12~ Weld steel bars onto the horizontal flat iron on the upper part of the precast intermediate wall (2) and the precast corner wall (11) to form a rebar embedded in the upper floor slab during the construction of the upper floor slab.

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