PC Exterior Wall Panel Connection Structure and Installation Method of PC Exterior Wall Panel

Abstract

The present invention discloses a connection structure for a PC external wall panel and an installation method for the PC external wall panel. The connection structure includes an upper node, a lower node, and an anchoring device. The upper node is used to connect the anchoring device to the upper PC external wall panel, the lower node is used to connect the anchoring device to the lower PC external wall panel, and the anchoring device is used to connect the upper node and the lower node to a concrete beam, overcoming the problems existing in the installation of PC external wall panels with steel corbels, simplifying construction, and reducing costs. The installation method includes the following steps: S1, installing embedded parts; S2, installing a fixing device; S3, hoisting the PC external wall panel; S4, fixing the PC external wall panel. By pre-burying the first embedded part, the second embedded part, the upper node, and the lower node, the on-site workload is reduced, and the embedding accuracy of the embedded parts is improved. During the on-site hoisting process, only long screws are needed to connect the upper node, the lower node, and the fixing device, which is convenient for on-site operation and improves construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of building exterior wall construction, and particularly relates to a connecting structure for PC exterior wall panels and an installation method for PC exterior wall panels. Background Art

[0002] At present, most building exterior walls use glass curtain walls, which have problems such as light pollution, low energy efficiency, poor fire resistance, and glass shedding. While solving these problems, PC exterior wall panels also have the advantages of diverse shapes, convenient installation, good sound insulation and privacy, and are increasingly recognized by society and the industry.

[0003] Most traditional connection methods for exterior wall panels are to set support brackets on the side of the wall panel surface, and connect them to the protruding lugs or steel brackets on the side of the main structure beam through angle steel, bolts, welds, etc. This connection method often has the following problems: the installation space is small, resulting in unreliable connection, and even unable to install due to production and construction errors; there are many connection parts at the node, causing complex construction operations; the explicit connection causes the connection nodes to protrude on the inner wall surface, and additional decoration and enclosure treatment are required, affecting the space use and increasing the economic cost, etc. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a connecting structure for PC exterior wall panels, which overcomes the problems existing in the installation of existing steel brackets for PC exterior wall panels, simplifies construction, and reduces costs;

[0005] The technical problem to be solved by the present invention is also to provide an installation method for PC exterior wall panels, which can effectively reduce the construction difficulty, improve work efficiency, and ensure the connection quality by adopting this method.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a connecting structure for PC exterior wall panels, including an upper node, a lower node, and an anchoring device. The upper node is used to connect the anchoring device and the upper PC exterior wall panel, the lower node is used to connect the anchoring device and the lower PC exterior wall panel, and the anchoring device is used to connect the upper node and the lower node to the concrete beam.

[0007] The anchoring device includes a first embedded part, a second embedded part, and a limiting plate. The first embedded part and the second embedded part have the same structure, and both include a steel plate and anchoring bars. The anchoring bars are welded to the lower surface of the steel plate and embedded in the concrete beam. The upper surface of the steel plate of the first embedded part is flush with the top surface of the concrete beam, and the outer surface of the steel plate of the second embedded part is flush with the outer end surface of the concrete beam. The limiting plate is welded to the upper surface of the steel plate of the first embedded part, and a through hole for restricting the horizontal movement of the upper node is provided at the front end of the limiting plate. A fixing device is connected to the surface of the steel plate of the second embedded part, and the fixing device is used to support the upper node and hang the lower node.

[0008] The fixing device includes a T-shaped web and an angle steel. The T-shaped web is welded to the outer surface of the steel plate of the second embedded part, and both its transverse plate and vertical plate are perpendicular to the surface of the steel plate of the second embedded part. A through hole is provided in the middle of the vertical plate of the T-shaped web. The angle steel is installed on one side of the vertical plate of the T-shaped web by bolts, and the lower node is hung on the horizontal part of the angle steel.

[0009] The upper node and the lower node have the same structure and are arranged symmetrically up and down. The upper node is embedded at the lower end of the upper PC external wall panel, and the lower node is embedded at the upper end of the lower PC external wall panel. The upper node includes a steel plate, anchor bars and positioning nuts. The anchor bars are welded to the back of the steel plate. A through hole is provided in the middle of the steel plate. The positioning nut is welded to the back of the steel plate and is coaxially arranged with the through hole on the steel plate. A long screw rod is provided in a matching manner with the positioning nut. The lower end of the long screw rod of the upper node is inserted into the through hole at the front end of the limiting plate and its lower end contacts the top surface of the horizontal plate of the T-shaped web, which is used to support the upper node and the upper PC external wall panel. The upper end of the long screw rod of the lower node passes through the through hole in the horizontal part of the angle steel.

[0010] The through hole in the horizontal part of the angle steel is a long slot hole, and the extending direction of the long slot hole is the same as the width direction of the lower PC external wall panel.

[0011] To solve the above technical problems, the technical solution adopted by the present invention is also: an installation method for a PC external wall panel, including the following steps:

[0012] S1. Install the embedded parts, including installing the first embedded part and the second embedded part during the casting process of the concrete beam, and also including installing the upper node and the lower node during the preparation process of the PC external wall panel. The upper node and the lower node are installed at the lower end and the upper end of each PC external wall panel respectively, and the T-shaped web is pre-welded on the surface of the steel plate of the second embedded part;

[0013] S2. Install the fixing device, including fixing and installing the angle steel on the middle of the vertical plate of the T-shaped web by bolts, and installing the long screw rod at the lower node of the PC external wall panel;

[0014] S3. Lift the PC external wall panel. According to the design requirements of the PC external wall panel, lift it to the designed position, and support the lower end of the long screw rod of the upper node of the PC external wall panel on the upper surface of the horizontal plate of the corresponding T-shaped web of the fixing device, and make the lower end of the long screw rod located in the through hole at the front end of the limiting plate. Adjust the elevation of the PC external wall panel by adjusting the extending length of the long screw rod of the upper node. At the same time, align the lower node of the PC external wall panel with the fixing device above it, insert the long screw rod through the through hole in the horizontal part of the corresponding fixing device, and thread the long screw rod with the positioning nut of the lower node of the PC external wall panel;

[0015] S4. Fix the PC external wall panel. Adjust the long screws at the upper and lower nodes to position the PC external wall panel in place. After adjusting the position of the limit plate, weld it to the upper surface of the first embedded part. The long screw passing through the through hole at the front end of the limit plate is spot-welded to the limit plate.

[0016] The beneficial effects of adopting the above technical solutions are as follows: This connection structure adopts the method of post-connection and post-fixing. First, install the first embedded part and the second embedded part at the designed positions and accurately position them. The first embedded part and the second embedded part are respectively equipped with a limit plate and a fixing device. Then, pre-embed the upper node and the lower node at the upper and lower parts of the PC external wall panel. The upper node and the lower node are respectively connected to the fixing device and the limit plate through long screws. Both the fixing device and the limit plate are adjustable structures. After the PC external wall panel is hoisted, connected and adjusted in place, connect the long screw to the limit plate and the fixing device, and weld the limit plate to the first embedded part. The lower part of the PC external wall panel plays a supporting and limiting role through the T-shaped web and the limit plate. The upper part of the PC external wall panel is connected to the angle steel through a long screw. The long slot holes provided in the horizontal part and the vertical part of the angle steel facilitate the adjustment of the position of the PC external wall panel, which can effectively reduce the number of nodes, simplify the installation and improve the work efficiency.

[0017] The beneficial effects of adopting the above technical solutions are as follows: This installation method is realized based on the above connection structure. By pre-burying the first embedded part, the second embedded part, the upper node and the lower node, the on-site workload is reduced and the embedding accuracy of the embedded parts is improved. During the on-site hoisting process, only the long screw is needed to connect the upper node to the lower node and the fixing device. Moreover, the position of the PC external wall panel can be adjusted through the long screw, the limit plate and the angle steel, which is convenient for on-site operation and improves the construction efficiency. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the present invention;

[0019] Figure 2 is Figure 1 the 1-1 cross-sectional view of

[0020] Figure 3 is Figure 1 the 2-2 cross-sectional view of

[0021] Figure 4 is the structural schematic diagram of the upper node;

[0022] Wherein: 1, concrete beam; 2, first embedded part; 3, second embedded part; 4, limit plate; 5, upper node; 5-1, anchor bar; 5-2, positioning nut; 5-3, steel plate; 6, long screw; 7, T-shaped web; 8, angle steel; 9, bolt; 10, steel backing plate; 11, lower node; 12, PC external wall panel. Detailed Embodiments

[0023] Combined with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0025] As Figures 1 - 3 shown, the present invention discloses a connecting structure for PC exterior wall panels, including an upper node 5, a lower node 11 and an anchoring device. The upper node 5 is used to connect the anchoring device to the upper PC exterior wall panel 12, and the lower node 11 is used to connect the anchoring device to the lower PC exterior wall panel 12. The anchoring device is used to connect the upper node 5 and the lower node 11 to the concrete beam 1. In the specific construction process, the number of upper nodes and lower nodes can be designed according to the width and weight of the PC exterior wall panel. At least two upper nodes are arranged at the upper part and two lower nodes are arranged at the lower part. The upper nodes and the lower nodes are both installed at the designed positions through molds during the production process of the PC exterior wall panel, with higher installation accuracy, and the structure of the PC exterior wall panel is avoided from being damaged during the installation process. In addition, the number and spacing of the anchoring devices also need to be matched with the number of upper nodes and lower nodes.

[0026] The anchoring device includes a first embedded part 2, a second embedded part 3 and a limit plate 4. The first embedded part 2 and the second embedded part 3 have the same structure and both include a steel plate and anchoring bars. The anchoring bars are welded to the lower surface of the steel plate and embedded in the concrete beam 1. The upper surface of the steel plate of the first embedded part 2 is flush with the top surface of the concrete beam 1, and the outer surface of the steel plate of the second embedded part 3 is flush with the outer end face of the concrete beam 1. The limit plate 4 is welded to the upper surface of the steel plate of the first embedded part 2. A through hole for restricting the horizontal movement of the upper joint 5 is provided at the front end of the limit plate 4. A fixing device is connected to the surface of the steel plate of the second embedded part 3. The fixing device is used to support the upper joint 5 and hang the lower joint 11. The first embedded part and the second embedded part are pre-installed in place during the casting process of the concrete beam, and their positions, levels and verticality are controlled. The top elevation of the first embedded part is the same as the top elevation of the concrete beam, and the outer surface of the steel plate of the second embedded part is flush with the end face of the concrete beam. The T-shaped web is pre-welded to the outside of the steel plate of the second embedded part. The angle steel can be installed on the T-shaped web during the embedding process or after the embedded part is buried. The limit plate is installed during the hoisting process.

[0027] The fixing device includes a T-shaped web 7 and an angle steel 8. The T-shaped web 7 is welded to the outer surface of the steel plate of the second embedded part 3, and its transverse plate and vertical plate are both perpendicular to the surface of the steel plate of the second embedded part 3. A through hole is provided in the middle of the vertical plate of the T-shaped web 7. The angle steel 8 is installed on one side of the vertical plate of the T-shaped web 7 through bolts 9. The lower joint 11 is hung on the horizontal part of the angle steel 8. Long slotted holes are provided in both the vertical part and the horizontal part of the angle steel. The long slotted hole in its vertical part is vertically arranged, and the length direction of the long slotted hole in its horizontal part is the same as the width direction of the PC exterior wall panel, for adjusting the vertical position and horizontal position of the upper joint. The distance between the PC exterior wall panel and the concrete beam is controlled by the second embedded part and the T-shaped web, and this distance is a fixed value.

[0028] The upper joint 5 and the lower joint 11 have the same structure and are symmetrically arranged up and down. The upper joint 5 (see attachment Figure 4 ) is embedded at the lower end of the upper PC exterior wall panel 12, and the lower joint 11 is embedded at the upper end of the lower PC exterior wall panel 12. The upper joint 5 includes a steel plate 5-3, anchoring bars 5-1 and a positioning nut 5-2. The anchoring bars 5-1 are welded to the back of the steel plate 5-3. A through hole is provided in the middle of the steel plate 5-3. The positioning nut 5-2 is welded to the back of the steel plate 5-3 and is coaxially arranged with the through hole on the steel plate 5-3. A long screw 6 is provided in a matching manner with the positioning nut 5-2. The lower end of the long screw 6 of the upper joint 5 is inserted into the through hole at the front end of the limit plate 4 and its lower end contacts the top surface of the horizontal plate of the T-shaped web 7, for supporting the upper joint 5 and the upper PC exterior wall panel 12. The upper end of the long screw 6 of the lower joint 11 passes through the through hole in the horizontal part of the angle steel 8; the through hole in the horizontal part of the angle steel 8 is a long slotted hole, and the extending direction of the long slotted hole is the same as the width direction of the lower PC exterior wall panel 12.

[0029] In the specific application process, the connection structure adopts the method of post-connection and post-fixing. First, install the first embedded part and the second embedded part at the designed positions and accurately position them. The first embedded part and the second embedded part are respectively equipped with a limit plate and a fixing device. Then, pre-embed the upper node and the lower node at the upper and lower parts of the PC exterior wall panel respectively. The upper node and the lower node are respectively connected to the fixing device and the limit plate through long screws. Both the fixing device and the limit plate are adjustable structures. After the PC exterior wall panel is hoisted and connected and adjusted in place, connect the long screws to the limit plate and the fixing device, and weld the limit plate to the first embedded part. The lower part of the PC exterior wall panel plays a role in support and limitation through the T-shaped web and the limit plate. The upper part of the PC exterior wall panel is connected to the angle steel through long screws. The long slot holes arranged in the horizontal part and the vertical part of the angle steel facilitate the adjustment of the position of the PC exterior wall panel, which can effectively reduce the number of joints, simplify the installation, and improve the work efficiency. The design of the long slot holes can meet the displacement performance of the PC exterior wall panel under the action of inter-story deformation of the frame structure, has a certain energy dissipation effect on the structural earthquake resistance, and moreover, the installation position of the long slot holes provides a certain redundancy for the errors generated during the prefabrication and on-site installation of the components.

[0030] The above-mentioned implicit connection structure of the PC exterior wall panel is applicable to multi-story concrete and steel frame structures with seismic intensity of 8 degrees and below. Its advantages in the connection between the precast sandwich insulation exterior wall panel and the prefabricated frame structure are particularly prominent, and the sizes of the connecting pieces and the welds can be specifically designed according to the actual project.

[0031] The present invention also discloses a construction method for installing a PC exterior wall panel by using the above connection structure, which specifically includes the following steps: S1. Install the embedded parts, including installing the first embedded part 2 and the second embedded part 3 during the casting process of the concrete beam 1, and also including installing the upper node 5 and the lower node 11 during the preparation process of the PC exterior wall panel 12. The upper node 5 and the lower node 11 are respectively installed at the lower end and the upper end of each PC exterior wall panel 12, and the T-shaped web 7 is pre-welded on the steel plate surface of the second embedded part 3;

[0032] S2. Install the fixing device, including fixing and installing the angle steel 8 in the middle of the vertical plate of the T-shaped web 7 by means of bolts 9, and installing long screws 6 at the lower node 11 of the PC exterior wall panel 12;

[0033] S3. Hoist the PC exterior wall panel 12. According to the design requirements of the PC exterior wall panel 12, hoist it to the designed position, and support the lower end of the long screw 6 at the upper node 5 of the PC exterior wall panel 12 on the upper surface of the horizontal plate of the T-shaped web 7 of the corresponding fixing device, and make the lower end of the long screw 6 located in the through hole at the front end of the limit plate 4. Adjust the elevation of the PC exterior wall panel 12 by adjusting the extending length of the long screw 6 at the upper node 5. At the same time, align the lower node 11 of the PC exterior wall panel 12 with the fixing device located above it, pass the long screw 6 through the horizontal part of the angle steel 8 of the corresponding fixing device, and thread the long screw 6 with the positioning nut at the lower node 11 of the PC exterior wall panel 12;

[0034] S4. Fix the PC exterior wall panel 12. Make the PC exterior wall panel 12 in place by adjusting the long screws 6 at the upper node 5 and the lower node 11. After adjusting the position of the limit plate 4, weld it to the upper surface of the first embedded part 2. The long screw 6 passing through the through hole at the front end of the limit plate 4 is spot-welded to the limit plate 4.

[0035] The above installation method is realized based on the above connection structure. By pre-burying the first embedded part, the second embedded part, the upper node and the lower node, the on-site workload is reduced and the embedding accuracy of the embedded parts is improved. During the on-site hoisting process, only the long screw is needed to connect the upper node with the lower node and the fixing device. Moreover, the position of the PC exterior wall panel can be adjusted by the long screw, the limit plate and the angle steel, which is convenient for on-site operation and improves the construction efficiency.

Claims

1. A method for installing PC exterior wall panels, characterized in that: The PC exterior wall panel connection structure is used to install the PC exterior wall panel. The PC exterior wall panel connection structure includes an upper node (5), a lower node (11) and an anchoring device; the upper node (5) is used to connect the anchoring device to the upper PC exterior wall panel (12), the lower node (11) is used to connect the anchoring device to the lower PC exterior wall panel (12), and the anchoring device is used to connect the upper node (5) and the lower node (11) to the concrete beam (1); The anchoring device includes a first embedded part (2), a second embedded part (3) and a limiting plate (4). The first embedded part (2) and the second embedded part (3) have the same structure, and both include a steel plate and anchoring bars. The anchoring bars are welded to the lower surface of the steel plate and embedded in the concrete beam (1). The upper surface of the steel plate of the first embedded part (2) is flush with the top surface of the concrete beam (1), and the outer surface of the steel plate of the second embedded part (3) is flush with the outer end surface of the concrete beam (1). The limiting plate (4) is welded to the upper surface of the steel plate of the first embedded part (2), and a through hole for restricting the horizontal movement of the upper node (5) is provided at the front end of the limiting plate (4). A fixing device is connected to the surface of the steel plate of the second embedded part (3), and the fixing device is used to support the upper node (5) and hang the lower node (11); The fixing device includes a T-shaped web (7) and an angle steel (8). The T-shaped web (7) is welded to the outer surface of the steel plate of the second embedded part (3), and its horizontal plate and vertical plate are both perpendicular to the surface of the steel plate of the second embedded part (3). A through hole is provided in the middle of the vertical plate of the T-shaped web (7). The angle steel (8) is installed on one side of the vertical plate of the T-shaped web (7) through a bolt (9), and the lower node (11) is hung on the horizontal part of the angle steel (8); The upper node (5) and the lower node (11) have the same structure and are arranged symmetrically up and down. The upper node (5) is embedded at the lower end of the upper PC exterior wall panel (12), and the lower node (11) is embedded at the upper end of the lower PC exterior wall panel (12). The upper node (5) includes a steel plate (5-3), an anchoring bar (5-1) and a positioning nut (5-2). The anchoring bar (5-1) is welded to the back of the steel plate (5-3). A through hole is provided in the middle of the steel plate (5-3). The positioning nut (5-2) is welded to the back of the steel plate (5-3) and is coaxially arranged with the through hole on the steel plate (5-3). A long screw rod (6) is provided in a matching manner with the positioning nut (5-2). The lower end of the long screw rod (6) of the upper node (5) is inserted into the through hole at the front end of the limiting plate (4), and its lower end contacts the top surface of the horizontal plate of the T-shaped web (7), which is used to support the upper node (5) and the upper PC exterior wall panel (12). The upper end of the long screw rod (6) of the lower node (11) passes through the through hole in the horizontal part of the angle steel (8); The method includes the following steps: S1. Install embedded parts, including installing the first embedded part (2) and the second embedded part (3) during the casting process of the concrete beam (1), and also including installing the upper node (5) and the lower node (11) during the preparation process of the PC exterior wall panel (12). The upper node (5) and the lower node (11) are installed at the lower end and the upper end of each PC exterior wall panel (12) respectively. The T-shaped web (7) is pre-welded on the steel plate surface of the second embedded part (3). S2. Install the fixing device, including fixing and installing the angle steel (8) in the middle of the vertical plate of the T-shaped web (7) by means of bolts (9), and installing the long screw (6) at the lower node (11) of the PC exterior wall panel (12). S3. Lift the PC exterior wall panel (12). According to the design requirements of the PC exterior wall panel (12), lift it to the designed position, and support the lower end of the long screw (6) of the upper node (5) of the PC exterior wall panel (12) on the upper surface of the horizontal plate of the corresponding T-shaped web (7) of the fixing device, and make the lower end of the long screw (6) located in the through hole at the front end of the limit plate (4). Adjust the elevation of the PC exterior wall panel (12) by adjusting the extended length of the long screw (6) of the upper node (5). At the same time, align the lower node (11) of the PC exterior wall panel (12) with the fixing device located above it, insert the long screw (6) through the horizontal part of the angle steel (8) of the corresponding fixing device, and thread the long screw (6) with the positioning nut of the lower node (11) of the PC exterior wall panel (12). S4. Fix the PC exterior wall panel (12). Make the PC exterior wall panel (12) in place by adjusting the long screws (6) of the upper node (5) and the lower node (11). After adjusting the position of the limit plate (4), weld it to the upper surface of the first embedded part (2). The long screw (6) passing through the through hole at the front end of the limit plate (4) is spot-welded to the limit plate (4).

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