A layered assembly type concrete coupled shear wall

Abstract

The application belongs to the technical field of concrete building assembly, and particularly relates to a layered assembly type concrete coupled shear wall, which comprises a prefabricated shear wall, a prefabricated coupling beam and a connecting piece for connecting the two, the connecting piece comprises a first embedded piece embedded on the upper surface of the prefabricated shear wall and a second embedded piece embedded on the lower surface of the prefabricated coupling beam, the upper surface of the first embedded piece is provided with two first housings arranged along the length direction of the first embedded piece, the opposite side surfaces of the two first housings are elastically provided with a plurality of horizontally arranged limiting blocks and buffer blocks, the lower surface of the second embedded piece is provided with a second housing, the second housing protrudes from the lower surface of the second embedded piece, and the side surfaces of the second housing are provided with a plurality of limiting grooves matched with the limiting blocks, and the side surfaces of the second housing are connected with connecting blocks matched with the buffer blocks. The technical scheme can effectively solve the problem that the overall structural seismic performance of the beam and the shear wall is poor after the beam is connected with the shear wall in the current assembly type building.

Description

Technical Field

[0001] This invention belongs to the field of concrete building assembly technology, and specifically relates to a layered prefabricated concrete coupled shear wall. Background Technology

[0002] Prefabricated modular construction, often referred to as prefabricated building or modular building, refers to a construction method in which building components are prefabricated in a factory and then transported to the construction site for assembly. This construction method has advantages such as fast construction speed, stable building quality, and reduced construction costs, and is currently widely used in the construction field. In particular, prefabricated structures and connectors can be used to accelerate the construction progress between shear walls and beams. For example, a Chinese patent discloses a novel prefabricated shear wall structure (patent publication number: CN104652654B), which consists of prefabricated shear walls, prefabricated beams, prefabricated floor slabs, prefabricated window sill panels, and cast-in-place joints. The exterior walls are almost entirely prefabricated, while the interior walls can be either prefabricated or cast-in-place. The window sill panels are prefabricated, with pre-embedded steel reinforcement connecting sleeves at the bottom of the panels, which are connected to the pre-reserved steel reinforcement on the prefabricated connecting beams using grouting sleeves. All prefabricated components are linear, facilitating component production and transportation, and simplifying on-site installation.

[0003] While the above-mentioned technical solution provides a prefabricated assembly structure and method between shear walls and beams, it does not consider seismic performance. In the construction industry, to minimize damage to buildings during earthquakes, buffer zones are usually set at the connection points to allow for a certain degree of relative displacement, thereby reducing damage to the connection points and adhering to the principles of not collapsing in major earthquakes, being repairable in moderate earthquakes, and being elastic in minor earthquakes. Therefore, in order to improve the seismic performance between beams and shear walls in prefabricated assembly, this invention provides a layered prefabricated concrete coupled shear wall. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a layered prefabricated concrete coupled shear wall to solve the problem of poor overall seismic performance of prefabricated buildings after the beams and shear walls are connected.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A layered prefabricated concrete coupled shear wall includes a precast shear wall, a precast coupling beam, and connectors for connecting the two. The connectors include a first embedded part pre-embedded in the upper surface of the precast shear wall and a second embedded part pre-embedded in the lower surface of the precast coupling beam. The upper surface of the first embedded part has two first shells arranged along its length. Both first shells protrude from the upper surface of the first embedded part and are symmetrically arranged about the first embedded part. Multiple horizontally arranged limiting blocks and buffer blocks are elastically inserted into the opposite two sides of the two first shells. The second... The lower surface of the embedded part is provided with a second shell, which protrudes from the lower surface of the second embedded part. The two sides of the second shell are provided with multiple limiting grooves that correspond one-to-one with the limiting blocks and cooperate with each other. The two sides of the second shell are connected with connecting blocks that are interlocked with the buffer blocks. When the precast connecting beam is combined with the precast shear wall, the second shell is located between the two first shells, and the space between the second shell and the two first shells is filled with flexible buffer material. At this time, each limiting block cooperates with the corresponding limiting groove, and the connecting block and the buffer block are interlocked with each other.

[0007] Furthermore, the upper surface of the buffer block is provided with a connecting groove, which is gradually inclined from top to bottom toward the direction of the second shell. The connecting block protrudes from the second shell and is gradually inclined from top to bottom toward the direction of the direction of the first shell. When the precast connecting beam and the precast shear wall are engaged, the connecting block moves vertically downward and engages with the connecting groove.

[0008] Furthermore, two vertically arranged first friction plates are connected between the two first shells. The two first friction plates are symmetrically arranged about the axis of the length direction of the first shell. The two sides of the second shell away from the first shell are provided with second friction plates that cooperate with the first friction plates. When the precast connecting beam cooperates with the precast shear wall, the two first friction plates cover and abut against the corresponding second friction plate surfaces.

[0009] Furthermore, the first friction plate has multiple first protrusions on the side surface near the second friction plate, and the second friction plate has multiple second protrusions on the side surface near the first friction plate. The horizontal cross-section of each first and second protrusion is an isosceles trapezoid. The multiple first and second protrusions are evenly spaced and staggered along the length direction of the first embedded part. The distance between any two adjacent first protrusions is greater than the maximum horizontal length of the second protrusion. The inclined surfaces on both sides of each first protrusion are covered with flexible buffer material. When the precast connecting beam and the precast shear wall are combined, the horizontal surface of each first protrusion abuts against the corresponding surface of the second friction plate, and the horizontal surface of each second protrusion abuts against the corresponding surface of the first friction plate. The inclined surfaces on both sides of adjacent first and second protrusions jointly compress the corresponding flexible buffer material.

[0010] Furthermore, multiple horizontally arranged tie rods are connected between the two first friction plates and the second housing. Each tie rod is arranged along the width direction of the first embedded part, and the multiple tie rods are evenly spaced along the length direction of the first embedded part. Both ends of each tie rod extend out of the first friction plate and are threaded with nuts.

[0011] Furthermore, a positioning element for auxiliary connection is provided between the first embedded part and the second embedded part. The positioning element includes a positioning cylinder vertically arranged in the two first housings and a positioning column spaced apart on the lower surface of the second housing. The diameter of the positioning column is smaller than the diameter of the positioning cylinder, and when the precast connecting beam and the precast shear wall are matched, the positioning column is inserted into the corresponding positioning cylinder.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. This invention, by setting a connector between the precast shear wall and the precast connecting beam, can quickly assemble the two. At the same time, through the cooperation of components such as buffer blocks, connecting blocks, flexible buffer materials, first friction plates and second friction plates, it can absorb and reduce the damage of earthquakes to the precast shear wall and the precast connecting beam, and has excellent shock absorption and energy dissipation effects.

[0014] 2. Under normal circumstances, the precast coupling beam and the precast shear wall are connected by connectors and positioning components to ensure the integrity and load-bearing capacity of the precast coupling beam and the precast shear wall. When an earthquake occurs, the positioning cylinder absorbs the seismic energy and undergoes plastic deformation, forming a first-order yield. Subsequently, flexible buffer materials and springs assist in further reducing the impact force of the earthquake. Then, through the cooperation of the first friction plate, the second friction plate, the first protrusion, and the second protrusion, a portion of the earthquake energy is converted into heat generated by friction. Multiple components work together to consume a large amount of seismic energy, achieving the effect of energy dissipation and vibration reduction.

[0015] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0017] Figure 1 This is a schematic diagram of the assembly of the precast shear wall and precast connecting beam of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the first embedded part in this invention. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the structure of the first embedded part in this invention. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the structure of the second embedded part in this invention;

[0022] Figure 6 This is a schematic diagram showing the assembly of the precast connecting beam and the precast shear wall in this invention.

[0023] Figure 7 for Figure 6 Sectional view at point BB;

[0024] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0025] Figure 9 for Figure 7 Sectional view at point DD.

[0026] The following labels are shown in the attached diagram:

[0027] 1 Precast shear wall, 2 Precast connecting beam, 3 Connecting component, 301 First embedded component, 302 Second embedded component, 4 First shell, 5 Limiting block, 6 Buffer block, 7 Second shell, 8 Limiting groove, 9 Connecting block, 10 Connecting groove, 11 First friction plate, 12 Second friction plate, 13 First protrusion, 14 Second protrusion, 15 Flexible buffer material, 16 Tie rod, 17 Positioning component, 1701 Positioning cylinder, 1702 Positioning column. Detailed Implementation

[0028] like Figures 1-9 As shown,

[0029] A layered prefabricated concrete coupled shear wall includes two prefabricated shear walls 1, a prefabricated connecting beam 2, and a connector 3 for connecting the prefabricated shear walls 1 and the prefabricated connecting beam 2. The connector 3 includes a first embedded part 301 embedded in the upper surface of the prefabricated shear wall 1 and a second embedded part 302 embedded in the lower surface of the prefabricated connecting beam 2. Both the first embedded part 301 and the second embedded part 302 are made of steel structure material, and during manufacturing, the first embedded part 301 and the second embedded part 302 are tied together with the reinforcing bars in the prefabricated shear wall 1 and the prefabricated connecting beam 2 to form an integral structure after casting. Two first shells 4 are welded and fixed to the upper surface of the first embedded part 301 along its length. Both first shells 4 protrude from the upper surface of the first embedded part 301 and are symmetrically arranged about the first embedded part 301. Multiple horizontal cross-sections are elastically inserted on the opposite two sides of the two first shells 4. The set limit block 5 and buffer block 6 (a spring is provided between the buffer block 6, the limit block 5 and the first housing 4) are provided. The limit block 5 is cylindrical and the end of each limit block 5 away from the first housing 4 is beveled. The lower surface of the second embedded part 302 is welded and fixed with the second housing 7. The second housing 7 protrudes from the lower surface of the second embedded part 302 and the two sides of the second housing 7 are provided with multiple limit grooves 8 that correspond one-to-one with the limit block 5 and cooperate with each other. The two sides of the second housing 7 are welded and fixed with connecting blocks 9 that are interlocked with the buffer block 6. When the precast connecting beam 2 and the precast shear wall 1 are engaged, the second housing 7 is located between the two first housings 4 and the second housing 7 and the two first housings 4 are spaced apart and filled with flexible buffer material 15. At this time, each limit block 5 cooperates with the corresponding limit groove 8 and the connecting block 9 is interlocked with the buffer block 6.

[0030] Concrete is also poured into the first shell 4 and the second shell 7 to improve the overall strength; a cylindrical limiting block 5 is inserted into a steel pipe, which is horizontally positioned inside the first shell 4 and welded in place (combined with...). Figure 3 (As shown).

[0031] As shown in the diagram, after the precast shear wall 1 and precast connecting beam 2 are manufactured in the factory, they are transported to the construction site and erected. First, the two precast shear walls 1 are placed vertically at intervals and fixed in their designated positions. Then, the precast connecting beam 2 is hoisted using a crane. During hoisting, the second shell 7 is placed vertically downwards between the corresponding two first shells 4. During placement, the side surface of the second shell 7 abuts against each limiting block 5, pushing the limiting block 5 into the first shell 4. When the surfaces of the first embedded part 301 and the second embedded part 302 abut against each other, and each limiting block 5 extends and engages with the corresponding limiting groove 8, the first shell 4 is placed in its designated position. The precast connecting beam 2 and the precast shear wall 1 are connected to each other through the engagement of the limiting groove 8 and the limiting block 5. Because there is a gap between the side surface of the second shell 7 and the adjacent first shell 4, the second shell 7 can only move within a small range along the axial direction of the limiting block 5. Simultaneously, the connecting block 9 also engages with the corresponding buffer block 6. After the second shell 7 and the first shell 4 are fitted together, flexible buffer material 15 is filled in the gap between the second shell 7 and the first shell 4, thus completing the installation of the precast connecting beam 2 and the precast shear wall 1. The first shell 4 is restricted in multiple degrees of freedom by the cooperation of multiple limiting blocks 5 and limiting grooves 8, allowing only the second shell 7 to move laterally along the axis of the limiting block 5. When an earthquake occurs, when one of the precast shear walls 1 transmits shear force through the precast connecting beam 2, the flexible buffer material 15 filled between the first shell 4 and the second shell 7 is first compressed and absorbs the impact force through deformation, reducing the transmitted shear force. Secondly, due to the compression and deformation of the flexible buffer material 15, the corresponding first shell 4 will move a certain distance along one axis of the limiting block 5. The connecting blocks 9 on both sides of the second shell 7 will drive the buffer block 6 to move, so that one buffer block 6 squeezes the corresponding spring, and the other buffer block 6 drives and stretches the corresponding spring. The two springs further absorb the shear force transmitted by the precast connecting beam 2, improving the energy dissipation and vibration reduction effect.

[0032] In this embodiment, the upper surface of the buffer block 6 is provided with a connecting groove 10. The connecting groove 10 is gradually inclined from top to bottom toward the direction of the second housing 7. The connecting block 9 protrudes from the second housing 7 and is gradually inclined from top to bottom toward the direction of the first housing 4. When the precast connecting beam 2 and the precast shear wall 1 are engaged, the connecting block 9 moves vertically downward and engages with the connecting groove 10.

[0033] Combination Figure 5 and Figure 9As shown, when the precast connecting beam 2 is vertically downward and cooperates with the precast shear wall 1, the lower end of the connecting block 9 is first inserted into the corresponding connecting groove 10. As the connecting block 9 gradually moves downward, the side surface of the connecting block 9 will abut against the inner wall of the connecting groove 10 and drive the buffer block 6 to move towards the second shell 7. At this time, the buffer block 6 will stretch the corresponding spring. After the precast connecting beam 2 and the precast shear wall 1 are assembled, the connecting blocks 9 on both sides of the second shell 7 will drive the buffer blocks 6 that cooperate with it to move in opposite directions and displace a distance, so that the springs on both sides of the second shell 7 are stretched and two opposite tensile forces are applied to the second shell 7. This can improve the connection stability between the precast connecting beam 2 and the precast shear wall 1, and further improve the shear resistance and the buffering effect against earthquakes.

[0034] In this embodiment, two vertically arranged first friction plates 11 are detachably connected between the two first housings 4 by bolts. The two first friction plates 11 are symmetrically arranged about the axis of the length direction of the first housing 4. The two sides of the second housing 7 away from the first housing 4 are provided with second friction plates 12 that cooperate with the first friction plates 11. The second friction plates 12 are detachably connected to the second housing 7 by bolts. When the precast connecting beam 2 cooperates with the precast shear wall 1, the two first friction plates 11 cover and abut against the corresponding second friction plate 12 surfaces.

[0035] Combination Figure 1 and Figure 2 As shown, the second friction plate 12 is pre-fixed to the surface of the second shell 7 by bolts. After the prefabricated connecting beam 2 and the prefabricated shear wall 1 are assembled, the first friction plate 11 is fixed between the two first shells 4 by bolts, ensuring that the adjacent two sides of the first friction plate 11 and the second friction plate 12 abut against each other. When an earthquake occurs, the prefabricated connecting beam 2 transmits shear force and drives the second shell 7 to move. At the same time, the second shell 7 will drive the second friction plate 12 to move in the horizontal direction. Since the first friction plate 11 and the second friction plate 12 abut against each other, the second friction plate 12 will rub against the first friction plate 11 while moving, converting part of the energy generated by the earthquake into heat energy generated by the friction of the first friction plate 11 and the second friction plate 12, further consuming the shear force transmitted by the prefabricated connecting beam 2, and further improving the shear resistance and the buffering effect against earthquakes.

[0036] In this embodiment, the surface of the first friction plate 11 near the second friction plate 12 is provided with a plurality of first protrusions 13, and the surface of the second friction plate 12 near the first friction plate 11 is provided with a plurality of second protrusions 14. The horizontal cross-section of each first protrusion 13 and second protrusion 14 is an isosceles trapezoid. The plurality of first protrusions 13 and second protrusions 14 are evenly spaced and staggered along the length direction of the first embedded part 301. The distance between any two adjacent first protrusions 13 is greater than the maximum horizontal length of the second protrusion 14. The inclined surfaces on both sides of each first protrusion 13 are covered with flexible buffer material 15. When the precast connecting beam 2 and the precast shear wall 1 are engaged, the horizontal surface of each first protrusion 13 abuts against the corresponding surface of the second friction plate 12, and the horizontal surface of each second protrusion 14 abuts against the corresponding surface of the first friction plate 11. The inclined surfaces on both sides of adjacent first protrusions 13 and second protrusions 14 jointly compress the corresponding flexible buffer material 15.

[0037] In order to protect and facilitate the disassembly of the first friction plate 11, a connecting plate is welded and fixed to the surface of the first friction plate 11 away from the second housing 7. The two sides of the connecting plate are provided with connecting ears that can be detachably connected to the two first housings 4 by bolts.

[0038] Combination Figure 7 and Figure 8 As shown, after the precast shear wall 1 and the precast connecting beam 2 are assembled, the first protrusion 13 and the second protrusion 14 are intersected and spaced apart. When an earthquake occurs, the precast connecting beam 2 transmits shear force, the second shell 7 moves axially along the limiting block 5, and the flexible buffer material 15 between the first protrusion 13 and the second protrusion 14 is first compressed and plastically deformed, absorbing part of the vibration generated by the earthquake. At the same time, the horizontal surface of the first protrusion 13 rubs against the surface of the second friction plate 12, and the horizontal surface of the second protrusion 14 rubs against the surface of the first friction plate 11, further absorbing the energy of the earthquake. The horizontal cross-section of each of the first protrusion 14 is an isosceles trapezoid. Therefore, the inclined sides on both sides of any two adjacent first protrusions 13 will limit the displacement of the corresponding second protrusion 14. This ensures the friction area of ​​the first protrusion 13 and the second protrusion 14 while further improving the supporting effect of the first protrusion 13 on the second protrusion 14. At the same time, if the earthquake is large and the shear force transmitted by the precast connecting beam 2 is also large, the inclined surfaces of the first protrusion 13 and the second protrusion 14 will undergo plastic deformation after they come into contact with each other, further absorbing and consuming the energy transmitted by the earthquake, thereby achieving the effect of energy dissipation and vibration reduction in large earthquakes.

[0039] Since the first friction plate 11 is detachably connected to the first housing 4 by bolts, and the second friction plate 12 is also detachably connected to the second housing 7 by bolts, when the first protrusion 13 and the second protrusion 14 absorb energy and undergo elastic deformation, the first friction plate 11 or the second friction plate 12 can be removed and replaced to ensure the shock absorption effect between the precast shear wall 1 and the precast connecting beam 2.

[0040] In this embodiment, three horizontally arranged pull screws 16 are connected between the two first friction plates 11 and the second housing 7. Each pull screw 16 is arranged along the width direction of the first embedded part 301, and the three pull screws 16 are evenly spaced along the length direction of the first embedded part 301. Both ends of each pull screw 16 extend out of the first friction plate 11 and are threaded with nuts. Of course, the surfaces of the second housing 7, the first friction plate 11, and the second friction plate 12 are provided with through holes for the pull screws 16 to pass through. Furthermore, the through holes on the surface of the first friction plate 11 are horizontally arranged strip-shaped through holes, which can ensure that the second housing 7 can move axially along the limiting block 5.

[0041] After the precast shear wall 1 and the precast connecting beam 2 are assembled, the three tie rods 16 are passed through the corresponding first friction plate 11, second friction plate 12 and second housing 7 and the nuts at both ends are tightened, which can increase the contact area between the first friction plate 11 and the second friction plate 12 and reduce the generation of gaps.

[0042] In this embodiment, a positioning element 17 for auxiliary connection is provided between the first embedded part 301 and the second embedded part 302. The positioning element 17 includes a positioning cylinder 1701 vertically arranged in the two first housings 4 and a positioning column 1702 spaced apart on the lower surface of the second housing 7. The diameter of the positioning column 1702 is smaller than the diameter of the positioning cylinder 1701. When the precast connecting beam 2 and the precast shear wall 1 are engaged, the positioning column 1702 is inserted into the corresponding positioning cylinder 1701.

[0043] It facilitates the positioning of the precast connecting beam 2 and the precast shear wall 1 during assembly. When the second shell 7 moves axially along the limiting block 5, the positioning column 1702 will also abut against the positioning cylinder 1701 while moving. When the positioning cylinder 1701 is subjected to force and undergoes plastic deformation, it will yield before components such as the buffer block 6, the first friction plate 11 and the second friction plate 12. This can ensure the stability between the precast connecting beam 2 and the precast shear wall 1 during small earthquakes.

[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A layered prefabricated concrete coupled shear wall, comprising a precast shear wall (1), a precast coupling beam (2), and a connector (3) for connecting the two, characterized in that: The connector (3) includes a first embedded part (301) embedded in the upper surface of the precast shear wall (1) and a second embedded part (302) embedded in the lower surface of the precast connecting beam (2). The upper surface of the first embedded part (301) is provided with two first shells (4) arranged along its length. Both first shells (4) protrude from the upper surface of the first embedded part (301) and are symmetrically arranged about the first embedded part (301). Multiple horizontally arranged limiting blocks (5) and buffer blocks (6) are elastically inserted on the opposite two sides of the two first shells (4). The lower surface of the second embedded part (302) is provided with a second shell (7). The second housing (7) protrudes from the lower surface of the second embedded part (302), and multiple limiting grooves (8) corresponding to and cooperating with the limiting blocks (5) are opened on both sides of the second housing (7). Connecting blocks (9) that are interlocked with the buffer blocks (6) are connected to both sides of the second housing (7). When the precast connecting beam (2) is matched with the precast shear wall (1), the second housing (7) is located between the two first housings (4), and flexible buffer material (15) is provided and filled between the second housing (7) and the two first housings (4). At this time, each limiting block (5) is matched with the corresponding limiting groove (8), and the connecting block (9) is interlocked with the buffer block (6). The upper surface of the buffer block (6) is provided with a connecting groove (10). The connecting groove (10) is gradually inclined from top to bottom toward the direction of the second shell (7). The connecting block (9) protrudes from the second shell (7) and is gradually inclined from top to bottom toward the direction of the first shell (4). When the precast connecting beam (2) and the precast shear wall (1) are engaged, the connecting block (9) moves vertically downward and engages with the connecting groove (10). Two vertically arranged first friction plates (11) are connected between the two first housings (4). The two first friction plates (11) are symmetrically arranged about the axis of the length direction of the first housing (4). The two sides of the second housing (7) away from the first housing (4) are provided with second friction plates (12) that cooperate with the first friction plates (11). When the precast connecting beam (2) cooperates with the precast shear wall (1), the two first friction plates (11) cover and abut against the corresponding second friction plate (12) surfaces. The first friction plate (11) has a plurality of first protrusions (13) on the side surface near the second friction plate (12), and the second friction plate (12) has a plurality of second protrusions (14) on the side surface near the first friction plate (11). The horizontal cross-section of each first protrusion (13) and second protrusion (14) is an isosceles trapezoid. The plurality of first protrusions (13) and second protrusions (14) are evenly spaced and staggered along the length direction of the first embedded part (301). The distance between any two adjacent first protrusions (13) is greater than that between the first and second protrusions (14). The maximum horizontal length of the two protrusions (14) and the inclined surfaces on both sides of each first protrusion (13) are covered with flexible buffer material (15). When the precast connecting beam (2) and the precast shear wall (1) are engaged, the horizontal surface of each first protrusion (13) abuts against the surface of the corresponding second friction plate (12), and the horizontal surface of each second protrusion (14) abuts against the surface of the corresponding first friction plate (11). The inclined surfaces on both sides of the adjacent first protrusions (13) and second protrusions (14) jointly squeeze the corresponding flexible buffer material (15).

2. A layered prefabricated concrete coupled shear wall according to claim 1, characterized in that: A plurality of horizontally arranged tie rods (16) are connected between the two first friction plates (11) and the second housing (7). Each tie rod (16) is arranged along the width direction of the first embedded part (301), and the plurality of tie rods (16) are evenly spaced along the length direction of the first embedded part (301). Both ends of each tie rod (16) extend out of the first friction plate (11) and are threaded with nuts.

3. A layered prefabricated concrete coupled shear wall according to claim 2, characterized in that: A positioning element (17) for auxiliary connection is provided between the first embedded part (301) and the second embedded part (302). The positioning element (17) includes a positioning cylinder (1701) vertically arranged in the two first housings (4) and a positioning column (1702) spaced apart on the lower surface of the second housing (7). The diameter of the positioning column (1702) is smaller than the diameter of the positioning cylinder (1701). When the precast connecting beam (2) is matched with the precast shear wall (1), the positioning column (1702) is inserted into the corresponding positioning cylinder (1701).

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