CN114562059A - Shear wall connector and assembled shear wall and assembly method - Google Patents

Abstract

The invention discloses a shear wall connector, an assembled shear wall and an assembling method in the field of construction technology. The shear wall connector includes a pre-embedded part and a connector, and the pre-embedded part includes a side plate and a stud. and shear key, the side plate is provided with a first through hole, the peg and the shear key are respectively arranged on the inner and outer sides of the side plate, and the end of the peg connected to the side plate is provided with a threaded hole, The threaded hole is aligned with the first through hole, the connecting piece includes H-shaped steel, and the flange plate of the H-shaped steel is provided with a second through hole and an anti-shear key matching the first through hole and the anti-shear key on the side plate. Scissor key adapter hole. The embedded parts are embedded in the surface of the concrete wall and assembled by connecting parts. During installation, the shear key is inserted into the fitting hole of the shear key, which plays a role in shear resistance, and is connected and fixed by bolts. Compared with the existing assembly method, the connector of the present application does not require temporary support, can realize dry modular construction, has high construction efficiency, and has better economic benefits.

Description

Shear wall connector and assembled shear wall and assembly method

technical field

The invention relates to the technical field of construction, in particular to a shear wall connector, an assembled shear wall and an assembly method.

Background technique

The prefabricated concrete shear wall structure is factory prefabricated and assembled on site, which can greatly reduce labor costs, improve the quality of components, and has good economic benefits and application effects. At present, there are two main connection methods for prefabricated concrete shear wall structures: the first is to expose annular stirrups on both sides of the wall. The shear wall panels are connected; the second is to expose the steel bars at the top of the lower wall panels, and pre-embed the sleeves at the lower part of the upper wall panels and the corresponding positions of the steel bars reserved for the lower wall panels. After the lower wall panels are installed in place, install For the prefabricated layer of the floor, the cast-in-place layer of the floor is poured, the upper wall panels are installed on the upper part of the floor elevation, and the upper and lower wall panels are connected by grouting. The existing concrete shear wall panel connection method has the disadvantages of large amount of temporary support for fixing the wall panel, large amount of on-site wet work, difficult to guarantee the quality of grouting in the sleeve and slow construction progress. How to reduce the on-site wet operation, reduce the amount of temporary support, ensure the connection quality, realize the modular dry connection of shear wall panels, further reduce the construction cost of prefabricated shear walls, improve economic benefits, and innovate the connection technology of concrete prefabricated shear walls is an urgent problem.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of existing prefabricated concrete shear walls, the technical problem to be solved by the present invention is to provide a shear wall connector, prefabricated shear wall and assembly method that can reduce construction costs and improve assembly efficiency. .

The technical scheme adopted by the present invention to solve its technical problems is:

A shear wall connector includes a pre-embedded part and a connector, the pre-embedded part includes a side plate, a peg and a shear key, the side plate is provided with a plurality of first through holes at intervals, and the peg and The shear key also includes a plurality of and is arranged at intervals on the inner and outer sides of the side plate, the end of the bolt connected to the side plate is provided with a threaded hole, and the threaded hole is aligned with the first through hole, and the connecting piece includes H-shaped steel and a rib plate spaced between two flange plates of the H-shaped steel, the flange plate of the H-shaped steel is provided with a second through hole and an anti-shear key matching the first through hole and the shear key on the side plate Scissor key adapter hole.

Further, the first through holes and the shear keys on the embedded parts are alternately and spaced apart from each other.

Further, the shear key has a frustum structure, and the larger end is fixed to the side plate, and the shear key fitting hole is an inverted tapered hole adapted to the shear key.

Further, the height of the shear key is 5-10mm higher than the depth of the shear key fitting hole.

Further, the shear key fitting hole is arranged at the corner formed by the web and the rib of the H-shaped steel.

Further, the end of the peg away from the side plate is provided with a hemispherical top cap, and the outer diameter of the hemispherical top cap is larger than the outer diameter of the peg by about 5 mm.

The prefabricated shear wall includes a reinforced concrete prefabricated wall panel, and also includes a shear wall connector, wherein the side plate of the embedded part is arranged on the assembly surface of the prefabricated wall panel, and the wall panel reinforcement in the prefabricated wall panel is connected to the The inner side of the side panel is welded and fixed, the connector is located between the assembly surfaces of the two adjacent prefabricated wall panels, the embedded part and the connector are matched and welded through the shear key and the shear key fitting hole, and are sequentially The bolts passing through the second through hole, the first through hole and the threaded hole are fixed together.

Further, for the shear wall that needs to be erected with a floor slab, a transverse connector is provided on the top of the shear wall, and the floor slab includes a prefabricated floor slab and a cast-in-place floor slab, and the lapped end of the prefabricated floor slab passes through exposed belt hooks. The steel bars are erected on the lower flange plate of the H-shaped steel, the cast-in-situ floor slab is cast on the prefabricated floor slab, and the end of the negative bending moment steel bar is welded on the web plate of the H-shaped steel.

Further, the side plate of the embedded part is located in the center of the prefabricated wall panel assembly surface, and its two sides are 8-12mm away from the two sides of the prefabricated wall panel, and the width of the connecting piece is equivalent to the width of the side plate.

The assembly method of the fabricated shear wall includes the following steps:

a. Make embedded parts and connectors according to the size of the wall and floor;

b. Take the embedded part as the frame, and weld the steel reinforcement of the wall panel on the inner side to form a steel mesh with frame;

c. Concrete is poured inside the reinforced mesh with frame, prefabricated prefabricated wall panel with frame, and prefabricated floor slab with exposed hook reinforcement at the same time;

d. Install multiple prefabricated wall panels through connectors to form in-line, L-shaped, T-shaped and cross-shaped lower-level prefabricated shear walls, and ensure that there are horizontal connectors at the parts where floor slabs need to be erected;

e. Install the prefabricated floor slab, and set the exposed floor slab reinforcement with hooks of the prefabricated floor slab on the lower flange plate of the H-shaped steel of the horizontal connector;

f. Bind the negative bending moment steel bar on the prefabricated floor slab, the end of the negative bending moment steel bar is welded on the web of the H-beam, and then pour the cast-in-place floor slab;

g. According to the installation method of the lower-level prefabricated shear wall, install the upper-level prefabricated shear wall. After the assembly is completed, use anti-rust paint to treat the exposed connectors and embedded connectors for anti-rust treatment, and then use anti-rust paint in the gaps of the connectors. Filled with dry hard aerated concrete or rock wool, and finally painted with cement mortar.

The beneficial effects of the present invention are:

1. The prefabricated wall panels are installed and connected through connectors and embedded parts, without temporary support, and dry modular construction can be realized to ensure the safe and reliable transmission of tensile and shear forces between the connectors and the prefabricated wall panels, and enhance the shear force. the integrity of the wall;

2. The adaptability of embedded parts and connectors has been verified in the factory, which can ensure that the wall panels and connectors are in place accurately during on-site installation, which is conducive to speeding up the construction progress, saving costs, and having better economic benefits ;

3. As a frame, the embedded parts can protect the prefabricated wall panels. During the handling and transportation process, it can reduce the phenomenon of missing corners and blocks due to collisions of the prefabricated wall panels;

4. The connectors and embedded parts located in the edge members increase the steel content of the edge members, which can realize the same strong or super strong connection with the cast-in-place structure, and the integrity of the shear wall is good.

Description of drawings

Figure 1 is a schematic structural diagram of the shear wall connector of the present invention.

FIG. 2 is a schematic diagram of the structure of the stud of the present invention.

FIG. 3 is a schematic diagram of the installation structure of the shear key of the present invention.

4 is a schematic structural diagram of the assembled shear wall of the present invention.

FIG. 5 is a schematic diagram of the structure of the steel mesh of the assembled shear wall according to the present invention.

FIG. 6 is a schematic diagram of the floor slab installation structure of the present invention.

Marked as, 1- embedded parts, 2-connecting parts, 3-prefabricated wall panels, 4-prefabricated floor slabs, 5-cast-in-place floor slabs, 11-side slabs, 12-bolts, 13-shear keys, 14 -1st through hole, 15-threaded hole, 16-hemispherical top cap, 21-H-section steel, 22-flange plate, 23-shear key fitting hole, 24-second through hole, 25-rib plate, 26-web, 31-wall reinforcement, 41-floor reinforcement, 51-negative moment reinforcement.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

As shown in Figures 1-3, the shear wall connector of the present invention includes a pre-embedded part 1 and a connector 2. The pre-embedded part 1 includes a side plate 11, a stud 12 and a shear key 13. The plate 11 is provided with a plurality of first through holes 14 at intervals, and the pegs 12 and the shear keys 13 also include a plurality of and are disposed at intervals on the inner and outer sides of the side plate 11 respectively. The pegs 12 and the side plate 11 The connected end is provided with a threaded hole 15, and the threaded hole 15 is aligned with the first through hole 14. The connecting piece 2 includes an H-shaped steel 21 and a rib plate 25 arranged between the two flange plates 22 of the H-shaped steel 21. The flange plate 22 of the H-shaped steel 21 is provided with a second through hole 24 and a shear key fitting hole 23 that match the first through hole 14 and the shear key 13 on the side plate 11 .

The pre-embedded part 1 is pre-embedded on the surface of the concrete wall, which is convenient for assembling the concrete wall through the connecting part 2 . During installation, the shear key 13 on the embedded part 1 is inserted into the shear key adapter hole 23 to play a shear resistance role, and then the bolts passing through the second through hole 24 , the first through hole 14 and the peg 12 are passed through. Fix the connection. Compared with the existing assembly method, the shear wall connector of the present application does not require temporary support, and can realize dry modular construction, ensure the safe and reliable transmission of tensile force and shear force between the connector and the prefabricated wall panel, and enhance the shear force. The integrity of the wall; at the same time, the adaptability of the embedded parts and the connecting parts has been verified in the factory, which can ensure the precise positioning of the embedded parts and the connecting parts during on-site installation, which speeds up the construction progress and helps save costs. , with better economic benefits.

In order to facilitate construction and ensure the reliability of assembly, the application provides the following preferred methods:

In order to have a good connection effect, the first through holes 14 and the shear keys 13 on the embedded part 1 are alternately arranged at intervals.

In order to facilitate the alignment of the shear key 13 with the shear key fitting hole 23 during assembly, the shear key 13 has a frustum structure, and the larger end is fixed to the side plate 11 , and the shear key fitting hole 23 is Inverted tapered hole compatible with shear key 13.

In the installation process, in order to achieve good shear and tensile effects, it is necessary to weld the shear key 13 and the shear key adapter hole 23 after the butt is completed. Therefore, for the convenience of welding, the shear key 13 The height is preferably 5-10mm higher than the depth of the shear key adapting hole 23 to ensure that the shear key 13 can pass through the shear key adapting hole 23 during installation, so as to facilitate subsequent welding around the shear key 13 .

Further, as shown in FIG. 3 , the shear key fitting hole 23 is preferably arranged at the corner formed by the web 26 and the rib 25 of the H-shaped steel 21, so that the web 26 and the rib 25 of the connecting piece 2 Both can play a certain role in limiting and fixing the shear key 23, thereby improving the shear resistance and tensile strength.

For the bolts 12, in order to facilitate the processing of the threaded holes 15, a threaded sleeve structure can be used, but in order to prevent concrete from entering the threaded holes during the production of the prefabricated wall panels, a hemispherical top can be provided at the end of the bolts 12 away from the side plate 11. The cap 16, as shown in FIG. 2, has an outer diameter of the hemispherical top cap 16 larger than the outer diameter of the stud 12 by about 5 mm, which can prevent concrete from entering the threaded hole 15, and can prevent the embedded part 1 from loosening from the precast concrete wall.

As shown in Figures 4 and 5, the fabricated shear wall made of the above-mentioned shear wall connectors includes reinforced concrete prefabricated wall panels 3 and shear wall connectors, wherein the side panels of the embedded parts 1 11 is arranged on the assembly surface of the prefabricated wall panel 3, and the wall panel reinforcement 31 in the prefabricated wall panel 3 is welded and fixed to the inner side of the side panel 11, and the connector 2 is located between the assembly surfaces of the two adjacent prefabricated wall panels 3, The embedded part 1 and the connecting part 2 are matched and welded through the shear key 13 and the shear key adapter hole 23, and the bolts passing through the second through hole 24, the first through hole 14 and the threaded hole 15 in sequence fixed together. By rationally setting the positions of the embedded parts 1 and the connecting parts 2, the installation of the shear wall panels in the shape of a line, an L shape, a T shape or a connecting beam can be realized, and the versatility is strong.

Further, in order to adapt to the construction of the floor slab, for the shear wall where the floor slab needs to be erected, a transverse connector 2 is provided on the top of the shear wall. According to the requirements of "Technical Specifications for Prefabricated Concrete Structures" (JGJ 1-2014), the floor slabs of prefabricated concrete frame structures should be equipped with cast-in-place layers to ensure the integrity of the structure. The overlapping end of the prefabricated floor slab 4 is erected on the lower flange plate of the H-shaped steel 21 through the exposed floor slab reinforcement 41 with hooks. The ends of the reinforcing bars 51 are welded to the web 26 of the H-shaped steel 21 .

In order to prevent the steel structure from being exposed and rusted, the side plate 11 of the embedded part 1 is located in the center of the assembly surface of the prefabricated wall panel 3, and its two sides are 8-12 mm away from the two sides of the prefabricated wall panel 3. The width of the connecting part 2 is 8-12 mm. It is equivalent to the width of the side plate 11 . In this way, a gap can be left after the assembly is completed, which is convenient for subsequent painting with cement mortar to ensure that the wall is flat.

For the specific assembly method of the prefabricated shear wall, as shown in Figure 5 and Figure 6, it includes the following steps:

a. Make embedded parts and connectors according to the size of the wall and floor;

b. Take the embedded part as the frame, and weld the steel reinforcement of the wall panel on the inner side to form a steel mesh with frame;

c. Concrete is poured inside the reinforced mesh with frame, prefabricated prefabricated wall panel with frame, and prefabricated floor slab with exposed hook reinforcement at the same time;

d. Install multiple prefabricated wall panels through connectors to form in-line, L-shaped, T-shaped and cross-shaped lower-level prefabricated shear walls, and ensure that there are horizontal connectors at the parts where floor slabs need to be erected;

e. Install the prefabricated floor slab, and set the exposed floor slab reinforcement with hooks of the prefabricated floor slab on the lower flange plate of the H-shaped steel of the horizontal connector;

f. Bind the negative bending moment steel bar on the prefabricated floor slab, the end of the negative bending moment steel bar is welded on the web of the H-beam, and then pour the cast-in-place floor slab;

g. According to the installation method of the lower-level prefabricated shear wall, install the upper-level prefabricated shear wall. After the assembly is completed, use anti-rust paint to treat the exposed connectors and embedded connectors for anti-rust treatment, and then use anti-rust paint in the gaps of the connectors. Filled with dry hard aerated concrete or rock wool, and finally painted with cement mortar.

By adopting the shear wall connector and the assembling method of the present invention, the dry-type modular construction of the assembled shear wall can be realized, the integrity of the shear wall is enhanced, the construction progress is accelerated, the cost is saved, and the economy is better. benefit.

Claims (10)

1. Shear force wall connecting piece, characterized by: comprises an embedded part (1) and a connecting piece (2), wherein the embedded part (1) comprises a side plate (11), studs (12) and shear keys (13), a plurality of first through holes (14) are arranged on the side plate (11) at intervals, the studs (12) and the shear keys (13) also comprise a plurality of first through holes which are respectively arranged on the inner side and the outer side of the side plate (11) at intervals, one end of the stud (12) connected with the side plate (11) is provided with a threaded hole (15), and the threaded hole (15) is aligned with the first through hole (14), the connecting piece (2) comprises an H-shaped steel (21) and a rib plate (25) arranged between two flange plates (22) and a web plate (26) of the H-shaped steel (21) at intervals, and a flange plate (22) of the H-shaped steel (21) is provided with a second through hole (24) and a shear key adapting hole (23) which are matched with the first through hole (14) and the shear key (13) on the side plate (11).

2. A shear wall connector as defined in claim 1 wherein: the first through holes (14) and the shear keys (13) on the embedded part (1) are alternately arranged at intervals.

3. A shear wall connector as defined in claim 1 wherein: the shear key (13) is of a frustum structure, the larger end of the shear key is fixed with the side plate, and the shear key adapting hole (23) is an inverted conical hole matched with the shear key (13).

4. A shear wall connector as defined in claim 1 wherein: the height of the shear key (13) is 5-10mm higher than the depth of the shear key adapting hole (23).

5. A shear wall connector as defined in claim 1 wherein: the shear key adapting holes (23) are arranged at the corners formed by the webs (26) and the ribbed plates (25) of the H-shaped steel (21).

6. A shear wall connector as defined in claim 1 wherein: one end of the stud (12) far away from the side plate (11) is provided with a hemispherical top cap (16), and the outer diameter of the hemispherical top cap (16) is larger than that of the stud (12).

7. Assembled shear force wall, including reinforced concrete's prefabricated wallboard (3), characterized by: a shear wall connector according to any one of claims 1 to 6, wherein the side plates (11) of the embedded part (1) are arranged on the assembly faces of the prefabricated wall panels (3), the wall panel reinforcing steel bars (31) in the prefabricated wall panels (3) are welded and fixed with the inner sides of the side plates (11), the connector (2) is positioned between the assembly faces of two adjacent prefabricated wall panels (3), and the embedded part (1) and the connector (2) are in matched butt joint and welded through the shear key (13) and the shear key adapting hole (23) and are fixed together through bolts sequentially penetrating through the second through hole (24), the first through hole (14) and the threaded hole (15).

8. The fabricated shear wall of claim 7, wherein: for a shear wall needing to be built with a floor slab, a transverse connecting piece (2) is arranged at the top of the shear wall, the floor slab comprises a prefabricated floor slab (4) and a cast-in-place floor slab (5), the lap joint end of the prefabricated floor slab (4) is erected on a lower flange plate of H-shaped steel (21) through exposed floor slab reinforcing steel bars (41) with hooks, the cast-in-place floor slab (5) is cast on the prefabricated floor slab (4), and the end part of negative bending moment reinforcing steel bars (51) of the cast-in-place floor slab is welded on a web plate (26) of the H-shaped steel (21).

9. The fabricated shear wall of claim 8, wherein: the side plates (11) of the embedded parts (1) are positioned in the center of the assembly surface of the prefabricated wall plate (3), the distance between the two sides of the embedded parts and the two side surfaces of the prefabricated wall plate (3) is 8-12mm, and the width of the connecting parts (2) is equivalent to that of the side plates (1).

10. A method of assembling an assembled shear wall of claim 9, comprising the steps of:

a. manufacturing embedded parts and connecting pieces according to the sizes of the wall and the floor slab;

b. welding wall plate steel bars on the inner side of the embedded part serving as a frame to form a steel bar mesh with the frame;

c. pouring concrete inside the steel mesh with the frame, prefabricating the prefabricated wall plate with the frame, and prefabricating the prefabricated floor slab with the exposed steel bars with the hooks;

d. installing a plurality of prefabricated wall boards through connecting pieces to form a linear, L-shaped, T-shaped and cross-shaped lower-layer assembled shear wall, and ensuring that horizontal connecting pieces are arranged at positions where floor slabs need to be erected;

e. mounting a prefabricated floor slab, and erecting floor slab reinforcing steel bars with hooks exposed out of the prefabricated floor slab on a lower flange plate of the horizontal connecting piece H-shaped steel;

f. binding negative-moment reinforcing steel bars on the prefabricated floor slab, welding the end parts of the negative-moment reinforcing steel bars on a web plate of the H-shaped steel, and then pouring the cast-in-situ floor slab;

g. according to the installation method of the lower-layer assembled shear wall, the upper-layer assembled shear wall is installed, after the assembly is completed, the exposed connecting pieces and the embedded connecting pieces are subjected to rust prevention treatment by using rust prevention paint, then gaps of the connecting pieces are filled with dry and hard aerated concrete or rock wool, and finally, the gaps are painted by using cement mortar.

Images