Prefabricated filler wall and prefabricated vertical component connecting structure and construction method

Abstract

The invention relates to the technical field of production and construction of fabricated concrete structures, in particular to a connecting structure of a prefabricated infilled wall and a prefabricated vertical component and a construction method. Horizontal through holes which are arranged in parallel up and down are formed in the prefabricated infilled wall, and U-shaped tie bars are arranged at the two ends of each horizontal through hole. The prefabricated infilled wall is arranged between the two prefabricated vertical components, vertical through long grooves corresponding to the prefabricated infilled wall are reserved in the side faces of the prefabricated vertical components, and U-shaped anchoring ribs corresponding to the U-shaped tie bars are arranged in the through long grooves; during construction, the two ends of the prefabricated infilled wall fall in place along the through long grooves in the side faces of the prefabricated vertical components, the U-shaped tie bars are horizontally moved to form buckles with the U-shaped anchoring bars, the through long limiting bars are inserted into the buckles from top to bottom, and fine aggregate concrete is poured into vertical joints between the prefabricated infilled wall and the prefabricated vertical components to form a whole. Reliable connection between the prefabricated infilled wall and the prefabricated wall and between the prefabricated wall and the column type vertical component is guaranteed, and the cracking and leakage risks at the joints of the wall are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of production and construction of assembled concrete structures, and in particular to a connection structure and construction method of a prefabricated filling wall and a prefabricated vertical component, which is particularly suitable for the filling wall part between prefabricated walls and column-type vertical structural components. Background Art

[0002] In prefabricated concrete structures, prefabricated infill walls and vertical components such as prefabricated walls and columns are usually prefabricated in factories and then transported to the construction site for installation and connection to form an integral structure. At present, vertical cast-in-place strips are usually set between prefabricated infill walls and vertical components such as prefabricated walls and columns. The steel bars between the components are connected in the vertical cast-in-place strips, and then the cast-in-place strip formwork is supported and concrete is poured to form a whole. Finally, the formwork needs to be removed. This type of connection structure has many construction processes and low efficiency. Horizontal connecting bars need to be reserved on the sides of the prefabricated components, which is not convenient for production and transportation. The workload of supporting and removing the formwork of the cast-in-place strip is large, which increases the construction period and cost. It is also prone to quality problems such as mold expansion and cracking at the joints, and it incurs a lot of manual repair costs. Another disadvantage of this type of connection structure is that the prefabricated infill wall is usually cast as a whole by reinforced concrete, which has a greater self-weight than the traditional hollow brick infill wall, resulting in an increase in the amount of steel bars and concrete required for the building structure, and an increase in the overall cost, which is particularly obvious for high-rise buildings. In addition, the steel bar connection between the prefabricated infill wall and the prefabricated vertical component of this connection structure is mostly a linear overlap or an indirect overlap. The connection process is relatively complicated, the binding operation efficiency is low, and the quality of the steel bar connection is not easy to guarantee. Summary of the invention

[0003] In view of the above-mentioned technical problems, the purpose of the present invention is to provide a connection structure and construction method of a prefabricated infill wall and a prefabricated vertical component, which has a reasonable structure, reliable connection, and a high degree of standardization. It can effectively reduce the dead weight of the prefabricated infill wall, improve the on-site installation efficiency of the prefabricated infill wall, ensure the connection quality between the prefabricated infill wall and the prefabricated vertical components, shorten the construction period, and reduce the project cost.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A connection structure of a prefabricated infill wall and a prefabricated vertical component, wherein two or more horizontal through holes arranged in parallel vertically are provided in the prefabricated infill wall, and U-shaped tie bars are provided at both ends of each horizontal through hole; the prefabricated infill wall is arranged between two prefabricated vertical components, and a vertical full-length groove corresponding to the prefabricated infill wall is reserved on the side of the prefabricated vertical component, and a U-shaped anchor bar corresponding to the U-shaped tie bar is provided in the full-length groove; during construction, both ends of the prefabricated infill wall fall into place along the full-length groove on the side of the prefabricated vertical component, the U-shaped tie bar is moved horizontally to form a buckle with the U-shaped anchor bar, a full-length limit bar is inserted into the buckle from top to bottom, and fine stone concrete is poured in the vertical joint between the prefabricated infill wall and the prefabricated vertical component to form a whole.

[0006] The prefabricated filling wall is connected to the prefabricated vertical component structure. The top of the prefabricated filling wall is provided with a trapezoidal boss, and the bottom is provided with a trapezoidal groove to form a waterproof structure at the horizontal joint of the prefabricated filling wall.

[0007] The prefabricated filling wall is connected to the prefabricated vertical component structure, and the horizontal through holes are sealed with lightweight sealing materials at 450-500mm from both ends to form a cavity section in the middle and open sections at both ends. Horizontal U-shaped tie bars are respectively set at the open sections at both ends of the prefabricated filling wall.

[0008] The prefabricated filling wall and the prefabricated vertical component are connected in structure, and two parallel vertical protrusions are respectively provided at both ends of the prefabricated filling wall, and the vertical protrusions correspond to the through-length grooves, which are used to be inserted into the through-length grooves on the sides of the prefabricated vertical components to form temporary fixation. A vertical groove is provided between the two vertical protrusions, so that the vertical groove is used as an operating space for horizontally moving the U-shaped tie bars, and the cross-section of the vertical groove is semi-elliptical or trapezoidal.

[0009] The prefabricated filling wall is connected to the prefabricated vertical component structure, the tail of the U-shaped tie bar has a hook facing inward, the head of the U-shaped tie bar has a transverse support rod, the transverse support rod is located in the vertical groove, and the horizontal movement of the U-shaped tie bar is achieved by moving the transverse support rod.

[0010] The prefabricated filling wall and the prefabricated vertical component connection structure have the tail of the U-shaped tie bar extending into the open section of the horizontal through hole by 450 to 500 mm, and the head of the U-shaped tie bar extending out of the open section of the horizontal through hole by 100 to 150 mm.

[0011] The prefabricated filling wall and the prefabricated vertical component connection structure have a through-length groove with a depth of 200 to 250 mm and a cross-section of a semi-elliptical or trapezoidal shape; U-shaped anchor bars are arranged at intervals in the through-length groove, and their positions correspond to the U-shaped tie bars.

[0012] The prefabricated filling wall is connected to the prefabricated vertical component structure, and the horizontal through hole is formed by core pulling or extrusion. The cross-section of the horizontal through hole is rectangular, and the thickness of the thinnest part of the hole wall is not less than 35mm. The hole wall is equipped with prestressed tendons, which are arranged in the prefabricated filling wall along the horizontal direction.

[0013] The construction method of the connection structure of the prefabricated infill wall and the prefabricated vertical component is as follows: first, the prefabricated vertical components on both sides are installed in place, then the prefabricated infill wall in the middle is installed, and finally, fine stone concrete is poured in the vertical joint between the prefabricated infill wall and the prefabricated vertical component, and the prefabricated infill wall and the prefabricated vertical component are connected into one after hardening; after the vertical protrusions at both ends of the prefabricated infill wall fall into place along the full-length groove on the side of the prefabricated vertical component, the U-shaped tie bar is horizontally moved in the vertical groove by moving the transverse support rod to form a ring buckle overlap with the U-shaped anchor bar, and the full-length limit bar is inserted from top to bottom in the ring buckle to realize the connection between the steel bars, and fine stone concrete is poured in the vertical joint, and the prefabricated infill wall and the prefabricated vertical component are connected into one after hardening, and the fine stone concrete is simultaneously embedded in the open section of the horizontal through hole of the prefabricated infill wall to form a shear key.

[0014] The construction method of the prefabricated filling wall and the prefabricated vertical component connection structure comprises the following steps:

[0015] (1) First, install the prefabricated vertical components on both sides of the prefabricated infill wall in place, sprinkle water on the floor position corresponding to the bottom of the prefabricated infill wall to moisten it, set pads, and lay the seat slurry;

[0016] (2) U-shaped tie bars are inserted in advance into the open sections at both ends of the prefabricated infill wall, and the prefabricated infill wall is hoisted so that the vertical protrusions at both ends fall into place along the full-length grooves on the sides of the prefabricated vertical components. The vertical joints between the prefabricated infill wall and the prefabricated vertical components are temporarily fixed with wooden wedges, and the U-shaped tie bars are moved horizontally by moving the transverse support rods so that they form a buckle overlap with the U-shaped anchor bars in the full-length grooves on the sides of the prefabricated vertical components;

[0017] (3) Sprinkle water on the top surface of the prefabricated filling wall to moisten it, set pads, and lay the seat slurry;

[0018] (4) Continue to repeat steps (2) and (3) to install all prefabricated filling walls between the two vertical components;

[0019] (5) The full-length limit bars are passed from top to bottom through the loops formed by the U-shaped tie bars and the U-shaped anchor bars in the vertical joints to achieve the connection between the steel bars. Fine stone concrete is poured in the vertical joints. After it hardens, the precast infill wall and the precast vertical components are connected to form a whole. At the same time, the fine stone concrete is filled into the open section of the precast infill wall to form a shear key.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. The prefabricated infill wall of the present invention is prefabricated on a prestressed long line platform and then cut into sections according to the required length, with a high degree of standardization. The use of prestressed tendons and horizontal through holes can also reduce the amount of steel bars and concrete used in the prefabricated infill wall itself, thereby reducing production costs.

[0022] 2. The prefabricated filling wall of the present invention has several horizontal through holes, and both ends are sealed with lightweight sealing materials to form a middle cavity section, which can effectively reduce the self-weight of the prefabricated filling wall, thereby reducing the amount of steel bars and concrete required for the building structure and reducing the overall structural cost.

[0023] 3. During on-site construction of the present invention, the prefabricated filling wall can be directly placed in the corresponding position between the prefabricated vertical components, and the U-shaped tie bars in the open sections at both ends are horizontally moved to form a ring-locking overlap with the U-shaped anchor in the full-length groove on the side of the prefabricated vertical component. The vertical full-length limit bars are inserted and fine stone concrete is poured in the vertical joints, which effectively simplifies the process and improves the installation efficiency and the connection quality between components.

[0024] 4. The open section at the end of the prefabricated infill wall of the present invention is filled with fine stone concrete in the vertical joint to form a shear key similar to a tooth joint, and an effective connection with the prefabricated vertical component is achieved through the U-shaped tie bar, which is closer to the connection structure of the traditional masonry infill wall and the adjacent vertical component, which is conducive to reducing the impact on the overall structural rigidity. Thus, the purpose of improving the connection quality of components and the production and construction efficiency and reducing the project cost is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the prefabricated filling wall of the present invention.

[0026] Figure 2 It is a three-dimensional schematic diagram of the prefabricated vertical component of the present invention.

[0027] Figure 3 It is a schematic diagram of the installation of the prefabricated filling wall of the present invention.

[0028] Figure 4 It is a plan view of the prefabricated filling wall of the present invention after preliminary installation.

[0029] Figure 5 It is a plan view of the connection structure of the prefabricated filling wall and the prefabricated vertical component of the present invention.

[0030] Figure 6 It is a side schematic diagram of the prefabricated filling wall of the present invention after installation.

[0031] In the figure: 1. Prefabricated infill wall, 1-1. Prestressed tendons, 1-2. Horizontal through holes, 1-3. Trapezoidal bosses, 1-4. Trapezoidal grooves, 1-5. Lightweight sealing material, 1-6. Cavity section, 1-7. Open section, 1-8. Vertical protrusions, 1-9. Vertical grooves, 2. Prefabricated vertical components, 2-1. Full-length grooves, 2-2. U-shaped anchoring bars, 3. U-shaped tie bars, 3-1. Hooks, 3-2. Transverse braces, 4. Full-length limiting bars, 5. Fine stone concrete, 6. Seat slurry. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 to Figure 6 As shown, the present invention proposes a connection structure of a prefabricated infill wall and a prefabricated vertical component, wherein more than two horizontal through holes 1-2 arranged up and down are provided in the prefabricated infill wall 1, and U-shaped tie bars 3 are provided at both ends of each horizontal through hole 1-2; the prefabricated infill wall 1 is arranged between two prefabricated vertical components 2, and a vertical full-length groove 2-1 corresponding to the prefabricated infill wall 1 is reserved on the side of the prefabricated vertical component 2, and a U-shaped anchor bar 2-2 corresponding to the U-shaped tie bar 3 is provided in the full-length groove 2-1; during construction, both ends of the prefabricated infill wall 1 fall into place along the full-length groove 2-1 on the side of the prefabricated vertical component 2, the U-shaped tie bar 3 is moved horizontally to form a buckle with the U-shaped anchor bar 2-2, and the full-length limit bar 4 is inserted from top to bottom in the buckle, and finally fine stone concrete 5 is poured in the vertical joint between the prefabricated infill wall 1 and the prefabricated vertical component 2 to form a whole.

[0034] The prefabricated infill wall 1 is made on a prestressed long line in the factory, and the prestressed tendons 1-1 are arranged in the prefabricated infill wall 1 along the horizontal direction. Through the core pulling method or the extrusion method, horizontal through holes 1-2 arranged in parallel up and down are formed in the prefabricated infill wall 1. The cross section of the horizontal through holes 1-2 is rectangular, and the thickness of the thinnest part of the hole wall is not less than 35mm. The top of the prefabricated infill wall 1 is provided with a trapezoidal boss 1-3, and the bottom is provided with a trapezoidal groove 1-4 to form a waterproof structure at the horizontal joint of the prefabricated infill wall. After the prefabricated infill wall 1 is poured with concrete and cured, it is cut into the required length according to the actual size of the infill wall position on site. The horizontal through holes 1-2 are sealed with lightweight sealing materials 1-5 at 450 to 500mm from both ends to form a cavity section 1-6 in the middle and an open section 1-7 at both ends. The open sections 1-7 at both ends of the prefabricated infill wall 1 are respectively provided with horizontal U-shaped tie bars 3. The lightweight sealing material 1-5 can be made of lightweight and well-sealed materials such as foam glue to reduce the deadweight of the prefabricated filling wall 1 and prevent cement slurry from penetrating into the cavity section 1-6.

[0035] The tail of the U-shaped tie bar 3 is provided with a hook 3-1 facing inwards to increase the anchorage of the steel bar in the concrete; the head of the U-shaped tie bar 3 is provided with a transverse strut 3-2, and the horizontal movement of the U-shaped tie bar 3 is achieved by moving the transverse strut 3-2. The tail of the U-shaped tie bar 3 extends into the open section 1-7 of the horizontal through hole 1-2 by 450 to 500 mm, and the head of the U-shaped tie bar 3 extends out of the open section 1-7 of the horizontal through hole 1-2 by 100 to 150 mm.

[0036] A through-length groove 2-1 is provided on the side of the prefabricated vertical component 2, the depth of the through-length groove 2-1 is 200 to 250 mm, and the cross-section of the through-length groove 2-1 is semi-elliptical or trapezoidal. U-shaped anchor bars 2-2 are arranged at intervals in the through-length groove 2-1, and the position corresponds to the U-shaped tie bar 3. Two parallel vertical protrusions 1-8 are provided at both ends of the prefabricated filling wall 1, respectively, the vertical protrusions 1-8 correspond to the through-length groove 2-1, and are used to be inserted into the through-length groove 2-1 on the side of the prefabricated vertical component 2 to form a temporary fixation, a vertical groove 1-9 is provided between the two vertical protrusions 1-8, and the transverse support rod 3-2 of the U-shaped tie bar 3 is located in the vertical groove 1-9, so that the vertical groove 1-9 is used as an operating space when the transverse support rod 3-2 is horizontally moved, and the cross-section of the vertical groove 1-9 is semi-elliptical or trapezoidal.

[0037] After the vertical protrusions 1-8 at both ends of the precast infill wall 1 fall into place along the full-length groove 2-1 on the side of the precast vertical component 2, the U-shaped tie bar 3 is horizontally moved in the vertical groove 1-9 by moving the transverse support rod 3-2, so that it forms a loop overlap with the U-shaped anchor bar 2-2, and the full-length limit bar 4 is inserted from top to bottom in the loop to realize the connection between the steel bars, and fine stone concrete 5 is poured in the vertical joint. After it hardens, the precast infill wall 1 and the precast vertical component 2 are connected to form a whole, and the fine stone concrete 5 is also embedded in the open section 1-7 of the horizontal through hole 1-2 of the precast infill wall 1 to form a shear key.

[0038] like Figure 1 to Figure 6 As shown, the construction method for connecting the prefabricated filling wall and the prefabricated vertical component of the present invention is as follows:

[0039] (1) First, install the prefabricated vertical components 2 on both sides of the prefabricated infill wall 1 in place, sprinkle water on the floor position corresponding to the bottom of the prefabricated infill wall 1 to moisten it, set pads, and lay the seat slurry 6;

[0040] (2) Insert U-shaped tie bars 3 into the open sections 1-7 at both ends of the prefabricated infill wall 1 in advance, hoist the prefabricated infill wall 1 so that the vertical protrusions 1-8 at both ends fall into place along the full-length grooves 2-1 on the side of the prefabricated vertical component 2, temporarily fix the vertical joints between the prefabricated infill wall 1 and the prefabricated vertical component 2 with wooden wedges, and horizontally move the U-shaped tie bars 3 by moving the transverse braces 3-2 so that they form a loop-jointed connection with the U-shaped anchor bars 2-2 in the full-length grooves 2-1 on the side of the prefabricated vertical component 2;

[0041] (3) Sprinkle water on the top surface of the prefabricated filling wall 1 to moisten it, set pads, and lay the seat slurry 6;

[0042] (4) Continue to repeat steps (2) and (3) to install all prefabricated filling walls 1 between the two vertical members 2 in place;

[0043] (5) The full-length limit reinforcement 4 is passed from top to bottom through the loop formed by the U-shaped tie reinforcement 3 and the U-shaped anchor reinforcement 2-2 in the vertical joint to achieve the connection between the steel bars, and fine stone concrete 5 is poured in the vertical joint. After it hardens, the precast infill wall 1 and the precast vertical component 2 are connected to form a whole. The fine stone concrete 5 is also filled into the open section 1-7 of the precast infill wall 1 to form a shear key.

[0044] Wherein, fine aggregate concrete refers to concrete with a maximum particle size of coarse aggregate not greater than 15 mm, and the present invention can use C20 fine aggregate concrete.

[0045] The results of the embodiments show that the connection structure between the prefabricated infill wall and the prefabricated vertical component in the present invention is reasonable in structure, reliable in connection, and highly standardized. It can effectively reduce the dead weight of the prefabricated infill wall, improve the on-site installation efficiency and construction speed of the prefabricated infill wall, ensure the connection quality between the infill wall and the prefabricated wall and column-type vertical components, reduce the risk of cracking and leakage at the wall joints, greatly shorten the construction period, and reduce the project cost.

[0046] Obviously, as technology advances, a person skilled in the art can implement the inventive concept in various ways.Thus, the invention and its embodiments are not limited to the examples shown above, but may vary within the framework of the claims.

Claims

1. A prefabricated infill wall and prefabricated vertical component connection structure, characterized in that: Two or more horizontal through holes arranged in parallel vertically are provided in the precast infill wall, and U-shaped tie bars are provided at both ends of each horizontal through hole; the precast infill wall is arranged between two precast vertical components, and a vertical full-length groove corresponding to the precast infill wall is reserved on the side of the precast vertical component, and a U-shaped anchor bar corresponding to the U-shaped tie bar is provided in the full-length groove; during construction, both ends of the precast infill wall are dropped into place along the full-length groove on the side of the precast vertical component, the U-shaped tie bar is moved horizontally to form a buckle with the U-shaped anchor bar, the full-length limit bar is inserted into the buckle from top to bottom, and fine stone concrete is poured in the vertical joint between the precast infill wall and the precast vertical component to form a whole.

2. The prefabricated infill wall and prefabricated vertical component connection structure according to claim 1, characterized in that: A trapezoidal boss is provided on the top of the prefabricated filling wall, and a trapezoidal groove is provided on the bottom, so as to form a waterproof structure at the horizontal joints of the prefabricated filling wall.

3. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 1 is characterized in that: The horizontal through holes are sealed with lightweight sealing materials at a distance of 450 to 500 mm from both ends to form a cavity section in the middle and open sections at both ends. Horizontal U-shaped tie bars are respectively provided at the open sections at both ends of the prefabricated infill wall.

4. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 3 is characterized in that: Two parallel vertical protrusions are respectively provided at both ends of the prefabricated filling wall. The vertical protrusions correspond to the full-length grooves and are used to be inserted into the full-length grooves on the sides of the prefabricated vertical components to form temporary fixation. A vertical groove is provided between the two vertical protrusions so that the vertical grooves can be used as operating space for horizontally moving the U-shaped tie bars. The cross-section of the vertical grooves is semi-elliptical or trapezoidal.

5. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 4 is characterized in that: The tail of the U-shaped tie bar is provided with a hook facing inward, and the head of the U-shaped tie bar is provided with a transverse support rod, which is located in a vertical groove. The horizontal movement of the U-shaped tie bar is achieved by moving the transverse support rod.

6. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 5, characterized in that: The tail of the U-shaped tie bar extends into the open section of the horizontal through hole by 450 to 500 mm, and the head of the U-shaped tie bar extends out of the open section of the horizontal through hole by 100 to 150 mm.

7. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 4, characterized in that: The depth of the through-length groove is 200 to 250 mm, and the cross-section of the through-length groove is semi-elliptical or trapezoidal; U-shaped anchor bars are arranged at intervals in the through-length groove, and their positions correspond to the U-shaped tie bars.

8. The connection structure of the prefabricated infill wall and the prefabricated vertical component according to claim 1, characterized in that: The horizontal through hole is formed by core pulling or extrusion. The cross-section of the horizontal through hole is rectangular. The thickness of the thinnest part of the hole wall is not less than 35mm. The hole wall is equipped with prestressed tendons, which are arranged in the prefabricated filling wall along the horizontal direction.

9. A construction method for the connection structure of the prefabricated filling wall and the prefabricated vertical member according to any one of claims 1 to 8, characterized in that: First, install the prefabricated vertical components on both sides, then install the prefabricated infill wall in the middle, and finally pour fine stone concrete in the vertical joints between the prefabricated infill wall and the prefabricated vertical components. After it hardens, connect the prefabricated infill wall and the prefabricated vertical components into one. After the vertical protrusions at both ends of the prefabricated infill wall fall into place along the full-length grooves on the sides of the prefabricated vertical components, move the U-shaped tie bars horizontally in the vertical grooves by moving the transverse struts to form a loop-jointed overlap with the U-shaped anchor bars, insert the full-length limit bars from top to bottom in the loops to achieve the connection between the steel bars, pour fine stone concrete in the vertical joints, and after it hardens, connect the prefabricated infill wall and the prefabricated vertical components into one. At the same time, the fine stone concrete is embedded in the open section of the horizontal through hole of the prefabricated infill wall to form a shear key.

10. The construction method of the prefabricated filling wall and prefabricated vertical component connection structure according to claim 9, characterized in that: The steps include: (1) First, install the prefabricated vertical components on both sides of the prefabricated infill wall in place, sprinkle water on the floor position corresponding to the bottom of the prefabricated infill wall to moisten it, set pads, and lay the seat slurry; (2) U-shaped tie bars are inserted in advance into the open sections at both ends of the prefabricated infill wall, and the prefabricated infill wall is hoisted so that the vertical protrusions at both ends fall into place along the full-length grooves on the sides of the prefabricated vertical components. The vertical joints between the prefabricated infill wall and the prefabricated vertical components are temporarily fixed with wooden wedges, and the U-shaped tie bars are moved horizontally by moving the transverse support rods so that they form a buckle overlap with the U-shaped anchor bars in the full-length grooves on the sides of the prefabricated vertical components; (3) Sprinkle water on the top surface of the prefabricated filling wall to moisten it, set pads, and lay the seat slurry; (4) Continue to repeat steps (2) and (3) to install all prefabricated filling walls between the two vertical components; (5) The full-length limit bars are passed from top to bottom through the loops formed by the U-shaped tie bars and the U-shaped anchor bars in the vertical joints to achieve the connection between the steel bars. Fine stone concrete is poured in the vertical joints. After it hardens, the precast infill wall and the precast vertical components are connected to form a whole. At the same time, the fine stone concrete is filled into the open section of the precast infill wall to form a shear key.

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