Prefabricated wallboard connecting device of prestressed steel strand prefabricated concrete diaphragm wall

Abstract

The utility model discloses a prefabricated wallboard connecting device of a prestressed steel strand prefabricated concrete diaphragm wall, and aims to provide the prefabricated wallboard connecting device which can utilize the original prestressed steel strand in a prestressed wallboard to connect and transfer force so as to omit short steel bars in the existing connecting device. The prefabricated wallboard connecting device of the prestressed steel strand prefabricated concrete diaphragm wall effectively solves the problems that an existing connecting device is prone to causing cracking of the ends of prestressed wallboards, the quality of the diaphragm wall is affected, and even water seepage is caused. The two end plates are provided with anchoring structures, one end plate is arranged at the top end of a prestressed wallboard, and the upper ends of prestressed steel strands in the prestressed wallboard are anchored on the anchoring structures of the end plates; the other end plate is arranged at the bottom end of the other prestressed wall plate, and the lower end of the prestressed steel strand in the prestressed wall plate is anchored on the anchoring structure of the end plate; the connecting box is located between the two end plates, and the end plates are connected with the connecting box through bolts.

Description

Technical Field

[0001] The utility model relates to the technical field of precast concrete ground-connected walls, in particular to a precast wall panel connection device of a precast concrete ground-connected wall with prestressed steel strands. Background Art

[0002] To promote new building industrialization and drive the transformation and upgrading of the construction industry, it is urgent to promote prefabricated concrete buildings. To accelerate the coordinated development of intelligent construction and new building industrialization, it is proposed to vigorously develop prefabricated buildings and promote green construction methods. As a representative of green and low-carbon buildings, prefabricated buildings are being vigorously promoted due to their significant advantages such as energy conservation and emission reduction, shortened construction time and labor, and high construction efficiency.

[0003] Currently, most urban deep foundation pits use fully cast-in-place underground continuous walls. The construction of fully cast-in-place underground continuous walls has the disadvantages of slow construction speed and low efficiency. Underground continuous walls are prone to exposed reinforcement and poor wall quality. Based on the above needs, prefabricated prestressed precast concrete underground continuous walls have gradually been used, among which prefabricated steel strand prestressed concrete underground continuous walls are the most commonly used. The wall panels of prefabricated prestressed concrete underground continuous walls are factory-produced and standardized, which can significantly improve the efficiency of wall construction and conform to the concept of industrialized production and green construction of underground spaces. The prestressed wall panels are the core components of prefabricated prestressed concrete underground continuous walls.

[0004] In deep foundation pit projects, each prefabricated wall panel is made up of multiple sections of prestressed wall panels spliced ​​from top to bottom. Therefore, two adjacent sections of prestressed wall panels need to be connected by a connecting device. The existing connecting device generally adopts the method of short steel bars plus end plates, in which the short steel bars are welded to the end plates, and the short steel bars are pre-embedded in the ends of the prestressed wall panels, so that the end plates are fixed on the ends of the prestressed wall panels; then the end plates between the upper and lower sections of the prestressed wall panels are connected by welding. At present, this connection device of prestressed wall panels has the following shortcomings: the force acting on the connection device will be concentrated on the ends of the prestressed wall panels, which will cause the ends of the prestressed wall panels to be prone to cracking, affecting the quality of the underground continuous wall, and even causing water seepage problems. Utility Model Content

[0005] The purpose of the utility model is to provide a prefabricated wall panel connection device of a prefabricated concrete ground-connected wall with prestressed steel strands, which can utilize the original prestressed steel strands in the prestressed wall panels to connect and transmit force, thereby eliminating the short steel bars in the existing connection device and effectively solving the problem that the existing connection device easily causes cracks at the ends of the prestressed wall panels, affects the quality of the underground continuous wall, and even causes water seepage.

[0006] The technical solution of the utility model is:

[0007] A prefabricated wall panel connection device for a prefabricated concrete ground-connected wall with prestressed steel strands is provided. Any two adjacent prestressed wall panels are connected by the prefabricated wall panel connection device. A plurality of prestressed steel strands extending vertically are provided in the prestressed wall panels. The prefabricated wall panel connection device comprises:

[0008] Two end plates with anchoring structures, one of which is arranged at the top end of a prestressed wall panel, and the upper ends of the prestressed steel strands in the prestressed wall panel are anchored to the anchoring structure of the end plate; the other end plate is arranged at the bottom end of another prestressed wall panel, and the lower ends of the prestressed steel strands in the prestressed wall panel are anchored to the anchoring structure of the end plate;

[0009] The connection box is located between the two end plates, and the end plates are connected to the connection box by bolts. The precast wall panel connection device of the precast concrete ground-connected wall with prestressed steel strands in this solution is realized by anchoring the prestressed steel strands in the prestressed wall panels to the anchoring structure of the end plates, and then connecting the connection box to the upper and lower end plates by bolts. In this way, it can utilize the original prestressed steel strands in the prestressed wall panels to connect and transmit force, which not only saves the short steel bars in the existing connection device, but also allows the force applied to the precast wall panel connection device to be evenly transmitted from top to bottom to various parts of the prestressed wall panels through the prestressed steel strands, avoiding the force being concentrated at the ends of the prestressed wall panels. Therefore, it can effectively solve the problem that the force applied to the existing connection device will be concentrated at the ends of the prestressed wall panels, which is easy to cause cracks at the ends of the prestressed wall panels, affecting the quality of the underground continuous wall, and even causing water seepage.

[0010] In addition, the end plate and the anchoring structure on the end plate can also serve as the anchoring structure for fixing the two ends of the prestressed steel strands, that is, the end plate serves as the anchoring structure for the ends of the prestressed steel strands in the prestressed wall panel and the connecting structure of the prefabricated wall panel connecting device at the same time, which can ensure the structural stability of the prestressed steel strands in the prestressed wall panel and can also play the role of connecting the two sections of prestressed wall panels, thereby simplifying the overall structure of the prefabricated wall panel (that is, prefabricated prestressed wall panel) and reducing the construction cost.

[0011] Preferably, the anchoring structure includes a plurality of steel strand anchors, each of which includes a threaded sleeve fixedly connected to the end plate and a wedge-shaped clip disposed within the threaded sleeve. The threaded sleeve is provided with a locking nut. The end of the prestressed steel strand is anchored to the steel strand anchor, and the threaded sleeve and locking nut together constitute a bolt connecting the end plate and the connection box. In this way, the steel strand anchor can simultaneously serve as an anchoring structure for the end of the prestressed steel strand in the prestressed wall panel and a connection structure for the prefabricated wall panel connection device. The steel strand anchor can ensure the structural stability of the prestressed steel strand in the prestressed wall panel, and its threaded sleeve can also serve as a bolt to connect the end plate and the connection box, further simplifying the structure of the prefabricated wall panel connection device, thereby simplifying the overall structure of the prefabricated wall panel (i.e., prefabricated prestressed wall panel) and reducing construction costs.

[0012] As an advantage, the steel strand anchors on the end plates correspond one to one with the prestressed steel strands in the same prestressed wall panel. In this way, each prestressed steel strand end in the prestressed wall panel can be anchored by the steel strand anchors.

[0013] Preferably, the prestressed steel strands are prestressed, and the prestressed steel strands act on the end plates via the strand anchors, thereby securing the end plates to the ends of the prestressed wall panels. This ensures that the end plates are securely secured to the ends of the prestressed wall panels. Furthermore, there is no need for additional structures to secure the end plates to the ends of the prestressed wall panels, simplifying the structure and construction process.

[0014] Preferably, the end plate and the threaded sleeve are connected by welding, or the end plate and the threaded sleeve are connected by threads, or the end plate and the threaded sleeve are an integrally formed structure.

[0015] Preferably, the connection box includes a housing for accommodating the steel strand anchor, wherein the end of the prestressed steel strand, the locking nut, and the end of the threaded sleeve can be accommodated in the housing, thereby ensuring that the end plate can be smoothly connected to the connection box.

[0016] Preferably, the connection box includes two upper and lower box panels and a connection box frame connecting the two box panels. The upper and lower box panels are provided with a plurality of connection holes, and bolts pass through the connection holes on the box panels to connect the end plate to the connection box. In this way, the end plate can be smoothly connected to the connection box.

[0017] Preferably, the connection box frame includes a plurality of crisscross connection plates, which are connected to the upper and lower box plates by welding, thereby ensuring the structural strength of the connection box itself.

[0018] Preferably, the space between the upper and lower box plates and the connecting box frame forms a housing for the steel strand anchors, and the ends of the prestressed steel strands, the locking nut, and the threaded sleeve can all be accommodated in the housing. This ensures that the end plates can be smoothly connected to the connecting box.

[0019] Preferably, the top of the prestressed wall panel located at the top of the prefabricated wall panel is also provided with the end plate, and the upper ends of the prestressed steel strands in this prestressed wall panel are anchored to the anchor structure of the end plate; the bottom of the prestressed wall panel located at the bottom of the prefabricated wall panel is also provided with the end plate, and the lower ends of the prestressed steel strands in this prestressed wall panel are anchored to the anchor structure of the end plate. In this way, the upper and lower ends of the prestressed steel strands in each prestressed wall panel in the prefabricated wall panel can be anchored to the anchor structure of the end plate, thereby ensuring the structural stability of the prestressed steel strands in each prestressed wall panel in the prefabricated wall panel.

[0020] Preferably, one or more material-saving notches are provided on the end plate.

[0021] The beneficial effects of the present invention are: it can utilize the original prestressed steel strands in the prestressed wall panels to connect and transmit force, thereby eliminating the short steel bars in the existing connection device, and effectively solving the problem that the existing connection device easily causes cracks at the ends of the prestressed wall panels, affecting the quality of the underground continuous wall, and even causing water seepage. In addition, the end plate and the anchoring structure on the end plate can also serve as an anchoring structure for fixing the two ends of the prestressed steel strands, that is, the end plate serves as both the anchoring structure for the ends of the prestressed steel strands in the prestressed wall panels and the connecting structure of the prefabricated wall panel connection device, that is, it can ensure the structural stability of the prestressed steel strands in the prestressed wall panels, and can also play the role of connecting two sections of prestressed wall panels, thereby simplifying the overall structure of the prefabricated wall panels (i.e., prefabricated prestressed wall panels) and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a partial structural diagram of a prefabricated wall panel connection device of a prestressed steel strand prefabricated concrete ground-connected wall.

[0023] Figure 2 The utility model is a partial structural schematic diagram of the prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall during the actual installation process.

[0024] Figure 3 It is a partial structural diagram of the end plate and the steel strand anchor of the utility model.

[0025] Figure 4 The utility model is a partial structural schematic diagram of the prestressed steel strand anchored at the steel strand anchor.

[0026] In the picture:

[0027] Prestressed wall panel 1, prestressed steel strand 1.1;

[0028] End plate 2, end plate through hole 2.1;

[0029] Connecting box 3, box plate 3.1, connecting plate 3.2, accommodating cavity 3.3;

[0030] Steel strand anchor 4, threaded sleeve 4.1, wedge-shaped clip 4.2;

[0031] Lock nut 5. DETAILED DESCRIPTION

[0032] Specific embodiment 1, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, a prefabricated wall panel connection device for a precast concrete ground-connected wall with prestressed steel strands is provided. The prefabricated wall panel comprises at least two prestressed wall panels 1 arranged sequentially from top to bottom. A plurality of prestressed steel strands 1.1 extending vertically are provided within the prestressed wall panel 1. Any two adjacent prestressed wall panels 1 in the prefabricated wall panel are connected via the prefabricated wall panel connection device.

[0033] The precast wall panel connection device for a precast concrete ground-connected wall with prestressed steel strands includes a connection box 3 and two end plates 2. Both end plates 2 have an anchoring structure. One of the two end plates 2 in the same precast wall panel connection device is positioned at the top of a prestressed wall panel 1, with the upper end of the prestressed steel strands 1.1 in the prestressed wall panel 1 anchored to the anchoring structure of the end plate 2. The other end plate 2 is positioned at the bottom of another prestressed wall panel 1, with the lower end of the prestressed steel strands 1.1 in the prestressed wall panel 1 anchored to the anchoring structure of the end plate 2. The connection box 3 is located between the two end plates 2. The end plates 2 and the connection box 3 are connected by bolts.

[0034] The prefabricated wall panel connection device of the prestressed steel strand precast concrete ground-connected wall of this embodiment is configured by anchoring the prestressed steel strand 1.1 in the prestressed wall panel 1 on the anchoring structure of the end plate 2, and then connecting the connection box 3 to the upper and lower end plates 2 by bolts; in this way, it can utilize the original prestressed steel strand 1.1 in the prestressed wall panel 1 to connect and transmit force, which not only saves the short steel bars in the existing connection device, but also the force applied to the prefabricated wall panel connection device can be evenly transmitted from top to bottom to various parts of the prestressed wall panel 1 through the prestressed steel strand 1.1, avoiding the force being concentrated at the end of the prestressed wall panel 1, thereby effectively solving the problem that the force applied to the existing connection device will be concentrated at the end of the prestressed wall panel 1, which is likely to cause cracks at the end of the prestressed wall panel 1, affecting the quality of the underground continuous wall, and even causing water seepage.

[0035] In addition, the end plate 2 and the anchoring structure on the end plate 2 can also serve as the anchoring structure for fixing the two ends of the prestressed steel strand 1.1, that is, the end plate 2 serves as the anchoring structure of the end of the prestressed steel strand 1.1 in the prestressed wall panel 1 and the connecting structure of the prefabricated wall panel connecting device at the same time, that is, it can ensure the structural stability of the prestressed steel strand 1.1 in the prestressed wall panel 1, and can also play the role of connecting the two sections of prestressed wall panels 1, thereby simplifying the overall structure of the prefabricated wall panel (that is, the prefabricated prestressed wall panel 1) and reducing the construction cost.

[0036] Specific embodiment 2, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, a prefabricated wall panel connection device for a precast concrete ground-connected wall with prestressed steel strands is provided. The prefabricated wall panel comprises at least two prestressed wall panels 1 arranged sequentially from top to bottom. A plurality of prestressed steel strands 1.1 extending vertically are provided within the prestressed wall panel 1. Any two adjacent prestressed wall panels 1 in the prefabricated wall panel are connected via the prefabricated wall panel connection device.

[0037] The prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall comprises a connection box 3 and two end plates 2. Both end plates 2 are provided with an anchoring structure.

[0038] One of the two end plates 2 in the same prefabricated wall panel connection device is mounted on the top of a prestressed wall panel 1, with the upper ends of the prestressed steel strands 1.1 in that prestressed wall panel 1 anchored to the anchor structure of the end plate 2. The other end plate 2 is mounted on the bottom of another prestressed wall panel 1, with the lower ends of the prestressed steel strands 1.1 in that prestressed wall panel 1 anchored to the anchor structure of the end plate 2. In other words, the upper and lower ends of the prestressed steel strands 1.1 in each prestressed wall panel 1 between the topmost and bottommost prestressed wall panel 1 in the prefabricated wall panel are anchored to the anchor structure of the end plate 2.

[0039] The connection box 3 is located between the two end plates 2. The end plates 2 and the connection box 3 are connected by bolts.

[0040] In this embodiment, the top end of the prestressed wall panel 1 located at the top of the prefabricated wall panel is also provided with the end plate 2, and the upper end of the prestressed steel strands 1.1 in the prestressed wall panel 1 is anchored to the anchor structure of the end plate 2. The bottom end of the prestressed wall panel 1 located at the bottom of the prefabricated wall panel is also provided with the end plate 2, and the lower end of the prestressed steel strands 1.1 in the prestressed wall panel 1 is anchored to the anchor structure of the end plate 2. In this way, the upper and lower ends of the prestressed steel strands 1.1 in each prestressed wall panel 1 in the prefabricated wall panel can be anchored to the anchor structure of the end plate 2, thereby ensuring the structural stability of the prestressed steel strands 1.1 in each prestressed wall panel 1 in the prefabricated wall panel.

[0041] The prefabricated wall panel connection device of the prestressed steel strand precast concrete ground-connected wall of this embodiment is configured by anchoring the prestressed steel strand 1.1 in the prestressed wall panel 1 on the anchoring structure of the end plate 2, and then connecting the connection box 3 to the upper and lower end plates 2 by bolts; in this way, it can utilize the original prestressed steel strand 1.1 in the prestressed wall panel 1 to connect and transmit force, which not only saves the short steel bars in the existing connection device, but also the force applied to the prefabricated wall panel connection device can be evenly transmitted from top to bottom to various parts of the prestressed wall panel 1 through the prestressed steel strand 1.1, avoiding the force being concentrated at the end of the prestressed wall panel 1, thereby effectively solving the problem that the force applied to the existing connection device will be concentrated at the end of the prestressed wall panel 1, which is likely to cause cracks at the end of the prestressed wall panel 1, affecting the quality of the underground continuous wall, and even causing water seepage.

[0042] In addition, the end plate 2 and the anchoring structure on the end plate 2 can also serve as the anchoring structure for fixing the two ends of the prestressed steel strand 1.1, that is, the end plate 2 serves as the anchoring structure of the end of the prestressed steel strand 1.1 in the prestressed wall panel 1 and the connecting structure of the prefabricated wall panel connecting device at the same time, that is, it can ensure the structural stability of the prestressed steel strand 1.1 in the prestressed wall panel 1, and can also play the role of connecting the two sections of prestressed wall panels 1, thereby simplifying the overall structure of the prefabricated wall panel (that is, the prefabricated prestressed wall panel 1) and reducing the construction cost.

[0043] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the anchoring structure on the end plate 2 includes a plurality of steel strand anchors 4. The steel strand anchor 4 includes a threaded sleeve 4.1 fixedly connected to the end plate 2 and a wedge-shaped clip 4.2 arranged in the threaded sleeve 4.1 (the threaded sleeve 4.1 in the text refers to the external threaded sleeve 4.1). The wedge-shaped clip 4.2 is one or more pieces. In this embodiment, the wedge-shaped clip 4.2 is multiple pieces. The end plate 2 is provided with an end plate through hole 2.1 corresponding to the threaded sleeve 4.1 one by one. The axis of the threaded sleeve 4.1 is perpendicular to the end plate 2. A locking nut 5 is provided on the threaded sleeve 4.1. The end of the prestressed steel strand 1.1 is anchored on the steel strand anchor 4, that is, the end of the prestressed steel strand 1.1 passes through the threaded sleeve 4.1 and is anchored in the threaded sleeve 4.1 through the wedge-shaped clip 4.2. The threaded sleeve 4.1 and the locking nut 5 together constitute a bolt connecting the end plate 2 and the connection box 3. In this way, the steel strand anchor 4 can simultaneously serve as the anchoring structure of the end of the prestressed steel strand 1.1 in the prestressed wall panel 1 and the connecting structure of the prefabricated wall panel connecting device. The steel strand anchor 4 can ensure the structural stability of the prestressed steel strand 1.1 in the prestressed wall panel 1, and its threaded sleeve 4.1 can be used as a bolt to connect the end plate 2 and the connecting box 3, further simplifying the structure of the prefabricated wall panel connecting device, thereby simplifying the overall structure of the prefabricated wall panel (i.e., the prefabricated prestressed wall panel 1) and reducing the construction cost.

[0044] In this embodiment, the steel strand anchors 4 on the end plates 2 correspond one-to-one to the prestressed steel strands 1.1 in the same prestressed wall panel 1. In this way, the end of each prestressed steel strand 1.1 in the prestressed wall panel 1 can be anchored by the steel strand anchors 4.

[0045] Of course, it should be noted that the number of steel strand anchors 4 on the end plate 2 may be less than the prestressed steel strands 1.1 in the same prestressed wall panel 1, and only some of the ends of the prestressed steel strands 1.1 in the same prestressed wall panel 1 are anchored by the steel strand anchors 4; or the number of steel strand anchors 4 on the end plate 2 may be more than the prestressed steel strands 1.1 in the same prestressed wall panel 1, and each end of the prestressed steel strand 1.1 in the same prestressed wall panel 1 can be anchored by the steel strand anchors 4, and some of the steel strand anchors 4 are left vacant.

[0046] The threaded sleeve 4.1 is fixedly connected to the end plate 2. Specifically,

[0047] In one example, the end plate 2 and the threaded sleeve 4.1 are connected by welding, so that the threaded sleeve 4.1 and the end plate 2 can be easily manufactured separately, while ensuring a stable connection between the end plate 2 and the threaded sleeve 4.1.

[0048] In another example, the end plate 2 and the threaded sleeve 4.1 are connected by threads, that is, the end plate through hole 2.1 on the end plate 2 has an internal thread, and the threaded sleeve 4.1 is threadedly connected to the internal thread. In this way, the threaded sleeve 4.1 and the end plate 2 can be manufactured separately, and the installation and removal of the threaded sleeve 4.1 can be facilitated.

[0049] In the third example, the end plate 2 and the threaded sleeve 4.1 are integrally formed, so as to ensure a stable connection between the end plate 2 and the threaded sleeve 4.1.

[0050] Further, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, prestressed steel strands 1.1 are prestressed. This prestressed force in prestressed steel strands 1.1 is applied to end plates 2 via strand anchors 4, securing end plates 2 to the ends of prestressed wall panels 1. This ensures that end plates 2 are securely secured to the ends of prestressed wall panels 1. Furthermore, there is no need for additional structures to secure end plates 2 to the ends of prestressed wall panels 1, simplifying the structure and construction process.

[0051] The specific manufacturing method is to tension the prestressed steel strand 1.1 on the outside of the prestressed wall panel 1, and then anchor the prestressed steel strand 1.1 in the threaded sleeve 4.1 through the wedge-shaped clip 4.2 to complete the installation of the end plate 2, so that the prestress on the prestressed steel strand 1.1 acts on the end plate 2 through the steel strand anchor 4, so that the end plate 2 is fixed to the end of the prestressed wall panel 1. The specific manufacturing method of the prestressed wall panel 1 (the prestressed wall panel 1 includes a concrete wall and the prestressed steel strand 1.1 therein) is a prior art, and its specific manufacturing method is not the invention point of this application. Therefore, this application does not elaborate on conventional technical means such as the specific manufacturing method of the prestressed wall panel 1.

[0052] Further, such as Figure 1 、 Figure 2 As shown, the connection box 3 includes a housing 3.3 for accommodating the steel strand anchor 4. The end of the prestressed steel strand 1.1, the locking nut 5, and the end of the threaded sleeve 4.1 can all be accommodated within the housing 3.3. This ensures that the end plate 2 can be smoothly connected to the connection box 3.

[0053] Specifically, the connection box 3 comprises two upper and lower box panels 3.1 and a connection box frame 3 connecting the two panels 3.1. Both panels 3.1 are provided with a plurality of connection holes. The space enclosed between the upper and lower panels 3.1 and the connection box frame 3 forms a receiving cavity 3.3 for accommodating the steel strand anchor 4.

[0054] The connection box 3 comprises a plurality of crisscross connection plates 3.2, which are connected to the upper and lower box plates 3.1 by welding, thereby ensuring the structural strength of the connection box 3 itself.

[0055] In this embodiment, the upper and lower box panels 3.1 are parallel. The connecting plate 3.2 is perpendicular to the box panels 3.1. Each strand anchor 4 has a connecting plate 3.2 on both sides, and any two adjacent strand anchors 4 have a connecting plate 3.2 between them. This further ensures the bearing capacity of the connecting box 3, enabling it to reliably and stably withstand external forces (including the tension of the prestressed strands 1.1 and external soil pressure).

[0056] Bolts pass through the connection holes on the box plate 3.1 to connect the end plate 2 to the connection box 3. Specifically, the connection holes on the same box plate 3.1 correspond one-to-one with the threaded sleeves 4.1 on the same end plate 2. The threaded sleeves 4.1 pass through the corresponding connection holes on the box plate 3.1, and the lock nuts 5 on the threaded sleeves 4.1 are tightened to connect the end plate 2 to the connection box 3.

[0057] Furthermore, one or more material-saving notches are provided on the end plate 2. In this embodiment, two material-saving notches are provided on the end plate 2. In this way, the material for making the end plate 2 can be saved, thereby reducing costs.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation of the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A prefabricated wall panel connection device for a precast concrete ground-connected wall with prestressed steel strands, wherein any two adjacent prestressed wall panels are connected by the prefabricated wall panel connection device, wherein a plurality of prestressed steel strands extending vertically are provided within the prestressed wall panels, and wherein the prestressed wall panels are characterized by comprising: Two end plates with anchoring structures, one of which is arranged at the top end of a prestressed wall panel, and the upper ends of the prestressed steel strands in the prestressed wall panel are anchored to the anchoring structure of the end plate; the other end plate is arranged at the bottom end of another prestressed wall panel, and the lower ends of the prestressed steel strands in the prestressed wall panel are anchored to the anchoring structure of the end plate; The connection box is located between the two end plates, and the end plates are connected to the connection box by bolts.

2. The prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall according to claim 1 is characterized in that: The anchoring structure includes several steel strand anchors, which include a threaded sleeve fixedly connected to the end plate and a wedge-shaped clip arranged in the threaded sleeve. A locking nut is provided on the threaded sleeve. The end of the prestressed steel strand is anchored on the steel strand anchor. The threaded sleeve and the locking nut together constitute a bolt connecting the end plate and the connection box.

3. The prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall according to claim 2, characterized in that: The steel strand anchors on the end plates correspond one-to-one to the prestressed steel strands in the same prestressed wall panel.

4. A prefabricated wall panel connection device for a prestressed steel strand prefabricated concrete ground-connected wall according to claim 2 or 3, characterized in that: The prestressed steel strands have prestress, and the prestress on the prestressed steel strands acts on the end plates through steel strand anchors, so that the end plates are fixed to the ends of the prestressed wall panels.

5. A prefabricated wall panel connection device for a prestressed steel strand prefabricated concrete ground-connected wall according to claim 2 or 3, characterized in that: The end plate and the threaded sleeve are connected by welding, or the end plate and the threaded sleeve are connected by threads, or the end plate and the threaded sleeve are an integrally formed structure.

6. A prefabricated wall panel connection device for a prestressed steel strand prefabricated concrete ground-connected wall according to claim 2 or 3, characterized in that: The connection box comprises a housing for accommodating the steel strand anchor, and the end of the prestressed steel strand, the locking nut and the end of the threaded sleeve can all be accommodated in the housing cavity.

7. A prefabricated wall panel connection device for a prestressed steel strand prefabricated concrete ground-connected wall according to claim 1, 2 or 3, characterized in that: The connection box includes two upper and lower box plates and a connection box frame connecting the upper and lower box plates. The upper and lower box plates are both provided with a plurality of connection holes. Bolts pass through the connection holes on the box plates to connect the end plate to the connection box.

8. The prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall according to claim 7, characterized in that: The connecting box frame comprises a plurality of connecting plates staggered in a crisscross pattern, and the connecting plates are connected to the upper and lower box plates by welding.

9. The prefabricated wall panel connection device of the prestressed steel strand prefabricated concrete ground-connected wall according to claim 7, characterized in that: The space enclosed between the upper and lower box plates and the connecting box frame constitutes a housing cavity for accommodating the steel strand anchor. The end of the prestressed steel strand, the locking nut and the end of the threaded sleeve can all be accommodated in the housing cavity.

10. A prefabricated wall panel connection device for a prestressed steel strand prefabricated concrete ground-connected wall according to claim 1, 2 or 3, characterized in that: The end plate is also provided at the top of the prestressed wall panel located at the top of the prefabricated wall panel, and the upper end of the prestressed steel strands in the prestressed wall panel is anchored on the anchoring structure of the end plate; the end plate is also provided at the bottom end of the prestressed wall panel located at the bottom of the prefabricated wall panel, and the lower end of the prestressed steel strands in the prestressed wall panel is anchored on the anchoring structure of the end plate.

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