An assembled prefabricated wall and a construction method thereof

Abstract

The application provides an assembled prefabricated wall and a construction method thereof, the assembled prefabricated wall comprises a prefabricated wall body, a connecting pipe is embedded in the prefabricated wall body, a double-cone type expansion sleeve, a middle expansion sleeve, an upper expansion sleeve and a double-cone type connecting column are arranged in the connecting pipe, the lower end of the double-cone type connecting column is embedded in the upper expansion sleeve, the upper end of the double-cone type connecting column is embedded in the double-cone type expansion sleeve, an internally-threaded pipe is arranged in the double-cone type connecting column, a connecting rod is further arranged in the connecting pipe, a middle-cone type support and a lower-cone type support are arranged on the connecting rod, the lower-cone type support is embedded in the double-cone type expansion sleeve, the upper end of the connecting rod is screwed into the internally-threaded pipe, the lower end of the connecting rod is screwed into the internally-threaded pipe, vertical communication holes are arranged on the middle-cone type support and the lower-cone type support, and a sealing air bag is arranged at the vertical communication hole of the middle-cone type support. In the assembling process, no inclined support needs to be installed; the connecting rod is arranged in the connecting cylinder, the double-cone type connecting column is installed during assembling, is not easy to be damaged by knocking during transportation, and no verticality correction is needed during assembling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated components, in particular to an assembled prefabricated wall and a construction method thereof. BACKGROUND

[0002] The existing prefabricated wall is connected through reserved steel bars and grouting sleeves, and the construction method mainly includes the following steps: (1) using a special steel bar positioning plate, checking the positioning and perpendicularity of the reserved steel bars, then hoisting the upper layer of prefabricated wall to align the holes, inserting the reserved steel bars of the lower layer of prefabricated wall into the grouting sleeves of the upper layer of prefabricated wall; (2) installing multiple inclined supports, correcting the positioning and perpendicularity of the wall, blocking the bottom, and grouting; (3) finally removing the inclined supports.

[0003] The prefabricated wall and the construction method thereof have the following problems: 1. The reserved steel bars are exposed, which are prone to deformation during transportation, affecting the subsequent assembly construction, and the positioning and perpendicularity correction of the reserved steel bars are required during assembly; 2. In order to install the inclined supports, holes need to be punched on the prefabricated wall and the transverse floor slab to install the connecting base, or bolts need to be embedded, to facilitate the installation of the connecting base, the punching damages the wall, and after the construction of the embedded bolts is completed, the exposed part of the embedded bolts needs to be cut off to avoid affecting the surface construction of the prefabricated wall, and finally the removal work of the inclined supports is required after the construction. SUMMARY

[0004] The present application provides an assembled prefabricated wall and a construction method thereof, which does not require the installation of inclined supports during assembly; the connecting rod is placed in the connecting cylinder, and the double-cone connecting column is installed during assembly, which is not easy to be damaged by knocking during transportation, and does not require correction of the perpendicularity during assembly.

[0005] The technical scheme of the present application is as follows: an assembled prefabricated wall, comprising a prefabricated wall body, a vertical through connecting pipe is embedded in the prefabricated wall body, a double-cone expansion sleeve, a middle expansion sleeve, an upper expansion sleeve and a double-cone connecting column are arranged in the connecting pipe from bottom to top, the lower end of the double-cone connecting column is embedded in the upper expansion sleeve, and the upper end is embedded in the double-cone expansion sleeve of the upper layer of prefabricated wall body, a vertical internal threaded pipe is arranged in the double-cone connecting column, a connecting rod is further arranged in the connecting pipe, a middle-cone support corresponding to the middle expansion sleeve is fixed on the connecting rod, a lower-cone support is fixed on the connecting rod close to the lower end, the lower-cone support is embedded in the double-cone expansion sleeve, the upper end of the connecting rod is screwed into the internal threaded pipe, the lower end of the connecting rod is screwed into the internal threaded pipe of the lower layer of prefabricated wall body, vertical communication holes are arranged on the middle-cone support and the lower-cone support, a sealing air bag is arranged at the vertical communication hole of the middle-cone support, and grouting holes are arranged at the upper and lower ends of the connecting pipe.

[0006] Furthermore, the double-cone type tensioning sleeve includes a tensioning sleeve body, in which an upper conical groove, an equal-diameter groove and a lower conical groove are arranged sequentially from top to bottom. The smaller inner diameter ends of the upper and lower conical grooves are close to the equal-diameter groove, and the equal-diameter groove communicates with the vertical connecting hole of the lower conical bracket.

[0007] Furthermore, the double-conical connecting column includes a central frustum, with conical sections at both its upper and lower ends. A column of equal diameter is positioned at the end of each conical section furthest from the central frustum. The sidewall of this column has a threaded groove. The upper conical section is fitted into the lower conical groove, and the upper column of equal diameter is placed within the groove. The lower conical section is fitted into a tightening sleeve, and the lower column of equal diameter passes through the tightening sleeve and is placed within the connecting pipe. The upper end of the precast wall body has an assembly groove that mates with the central frustum. The threaded grooves enhance the connection between the double-conical connecting column and the subsequently injected concrete.

[0008] Furthermore, both the middle conical support and the lower conical support include an inner connecting cylinder and an outer conical cylinder. The inner connecting cylinder is fixedly connected to the connecting rod, and connecting plates are fixed at intervals between the inner connecting cylinder and the outer conical cylinder. Vertical connecting holes are formed between adjacent connecting plates, and transverse through holes are also provided on the connecting plates. Adjacent vertical connecting holes are connected through the transverse through holes. The transverse through holes facilitate the flow and uniform rise of the subsequently injected concrete grout. Moreover, after the concrete solidifies, they increase the stability of the bond between the concrete and the corresponding support, making the support less prone to displacement under external forces.

[0009] Furthermore, the sealing airbag includes an annular airbag sheet, the inner side of which is bonded to the upper end of the inner connecting cylinder, and the outer side of which is bonded to the upper end of the outer conical cylinder.

[0010] Furthermore, the double-cone type tensioning sleeve, the intermediate tensioning sleeve, and the upper tensioning sleeve are all connected to the connecting pipe by a pin. One end of the pin is embedded in the precast wall body, and the other end passes through the connecting pipe and slides in the corresponding tensioning sleeve. The pin is fixedly connected to the connecting pipe.

[0011] Furthermore, the upper and lower ends of the double-cone type tensioning sleeve, the intermediate tensioning sleeve, and the upper tensioning sleeve are all provided with axial opening grooves.

[0012] A construction method for prefabricated wall panels includes the following steps:

[0013] (1) Produce the precast wall body, then transport it to the construction site, hoist the upper precast wall body, and embed the double cone connecting column of the lower precast wall body into the lower side of the double cone tensioning sleeve of the upper precast wall body;

[0014] (2) Rotate the connecting rod of the upper precast wall body in the circumferential direction so that the lower end of the connecting rod is screwed into the internal threaded pipe of the lower precast wall body. At the same time, the connecting rod drives the middle conical bracket and the lower conical bracket to move down. The middle conical bracket is embedded in the middle tension sleeve, and the lower conical bracket is embedded in the upper side of the double conical tension sleeve.

[0015] (3) Then install the double-cone connecting column of the upper precast wall body, rotate the double-cone connecting column so that the upper end of the connecting rod is screwed into the internal threaded pipe and the lower end of the double-cone connecting column is embedded in the tightening sleeve.

[0016] (4) Inject concrete grout through the grouting hole on the lower side of the connecting pipe. As the concrete grout is injected, the adjacent sealing airbags rupture. The concrete grout moves upward through the vertical connecting hole of the middle cone-shaped support. The sealing airbags rupture one by one from bottom to top. Finally, the concrete grout flows out from the upper grouting hole, completing the grouting.

[0017] Furthermore, in step (1), the production method of the precast wall body is as follows:

[0018] 1) The middle tensioning sleeve is fitted onto the middle conical bracket, the upper side of the double conical tensioning sleeve is fitted onto the lower conical bracket, the middle conical bracket and the lower conical bracket are fixed onto the connecting rod, and a conical positioning sleeve is fitted onto the upper end of the connecting rod, the conical positioning sleeve is embedded in the tensioning sleeve;

[0019] 2) Place the connecting rod processed in step 1) into the connecting tube, and then install the pins at the positions corresponding to the double conical tensioning sleeve, the middle tensioning sleeve and the upper tensioning sleeve;

[0020] 3) Place the steel cage and the connecting pipe treated in step 2) into the mold, pour concrete, vibrate and cure to obtain the precast wall body.

[0021] This precast wall production method allows for the direct use of circular steel pipes as connecting tubes, simplifying assembly and eliminating the need for halved semi-circular steel pipes that would require subsequent welding. Furthermore, the number of conical supports and tension sleeves can be customized as needed, unrestricted by the assembly method. The conical positioning sleeve is used to position the connecting rods, preventing them from wobbling during production and transportation.

[0022] Further, in step (1), the double-conical connecting column of the lower precast wall body is embedded in the double-conical tensioning sleeve of the upper precast wall body. At the same time, the double-conical connecting column will push the connecting rod of the upper precast wall body to move upward. The connecting rod will drive the conical positioning sleeve to disengage from the tensioning sleeve. The conical positioning sleeve will be removed from the connecting rod, and then step (2) will be performed.

[0023] The beneficial effects of this invention are:

[0024] The prefabricated wall assembly of this invention connects the lower conical bracket of the upper prefabricated wall body and the double conical connecting column of the lower prefabricated wall body into a whole through a double conical tensioning sleeve. The lower end of the connecting column is screwed into the internal threaded cylinder of the double conical tensioning sleeve, ensuring the connection strength and stability of the upper and lower prefabricated wall bodies. Simultaneously, through the cooperation of the middle conical bracket and the middle tensioning sleeve, and the cooperation of the lower end of the lower conical bracket with the upper tensioning sleeve, the corresponding tensioning sleeve is tightly attached to the inner wall of the connecting cylinder. The tensioning sleeve also has a shock-absorbing and buffering effect, which helps resist the impact of external forces and enhances the stability of the connecting rod support. During assembly, there is no need to install diagonal supports, and the connecting rod is placed inside the connecting cylinder. The double conical connecting column is installed during assembly, making it less prone to damage during transportation, and subsequent verticality correction is unnecessary. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of the prefabricated wall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of a prefabricated wall assembly.

[0028] Figure 3 A schematic diagram of the structure after the upper and lower prefabricated wall bodies are assembled;

[0029] Figure 4 for Figure 3 A magnified view of part A in the image;

[0030] Figure 5 for Figure 3 A magnified view of part B in the image;

[0031] Figure 6 for Figure 3 A magnified view of part C;

[0032] Figure 7 This is a schematic diagram of the internal structure of a double-cone type tensioning sleeve;

[0033] Figure 8 This is a top view of a cone-shaped support.

[0034] Figure 9 This is the main view of the medium-tension tight-fitting sleeve;

[0035] Figure 10 This is the front view of a double-cone type tensioning sleeve;

[0036] Figure 11 This is a top view of the sealed airbag.

[0037] 1. Precast wall body, 2. Connecting pipe, 3. Double conical tensioning sleeve, 4. Middle tensioning sleeve, 5. Upper tensioning sleeve, 6. Axial opening groove, 7. Pin, 8. Double conical connecting column, 9. Internal threaded pipe, 10. Connecting rod, 11. Middle conical bracket, 12. Lower conical bracket, 13. Inner connecting cylinder, 14. Outer conical cylinder, 15. Connecting plate, 16. Vertical connecting hole, 17. Horizontal through hole, 18. Sealing airbag, 19. Annular airbag plate, 20. Grouting hole, 21. Tensioning sleeve body, 22. Upper conical groove, 23. Equal diameter groove, 24. Lower conical groove, 25. Middle frustum, 26. Conical frustum, 27. Equal diameter column, 28. Threaded groove, 29. Assembly groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figure 2 and 3 As shown, a prefabricated wall assembly includes a prefabricated wall body 1. A vertically penetrating connecting pipe 2 is pre-embedded within the prefabricated wall body 1. The number of connecting pipes 2 can be multiple, such as two located at opposite ends of the prefabricated wall body 1, or three spaced apart, etc. Elastic metal double-cone type tensioning sleeves 3, intermediate tensioning sleeves 4, and rising tensioning sleeves 5 are spaced apart from bottom to top within the connecting pipe 2. Axial opening grooves 6 (such as...) are provided at both the upper and lower ends of the double-cone type tensioning sleeves 3, intermediate tensioning sleeves 4, and rising tensioning sleeves 5. Figure 9 and 10 As shown, the axial opening groove 6 facilitates radial expansion, allowing it to abut against the connecting pipe 2, enhancing support and providing shock absorption and buffering to resist external impacts. The number of tensioning sleeves 4 can be multiple, depending on the specific needs, such as two, four, etc.

[0041] The double-cone type tensioning sleeve 3, the intermediate tensioning sleeve 4, and the upper tensioning sleeve 5 are all connected to the connecting pipe 2 via pins 7. One end of the pin 7 is placed inside the precast wall body 1, and the other end passes through the connecting pipe 2 and slides inside the corresponding tensioning sleeve. The pin 7 is fixedly connected to the connecting pipe 2. The connecting pipe 2 is a steel pipe, and there are multiple pins 7 evenly distributed along the circumference of the connecting pipe 2. The corresponding tensioning sleeve is positioned by the pins 7, and the pins 7 slide inside the tensioning sleeve to facilitate the radial expansion of the tensioning sleeve. The pins 7 are welded and fixedly connected to the connecting pipe 2. The part of the pin 7 exposed in the connecting pipe 2 is embedded in the precast wall body 1, which can also enhance the connection between the connecting pipe 2 and the precast wall body 1.

[0042] like Figure 3 , 4 As shown in Figure 5, a double-conical connecting column 8 is also provided at the upper end of the connecting pipe 2. The lower end of the double-conical connecting column 8 is embedded in the tightening sleeve 5, and the upper end is embedded in the double-conical tightening sleeve 3 of the upper precast wall body. A vertical internally threaded pipe 9 is provided inside the double-conical connecting column 8. The double-conical connecting column 8 can be a precast concrete column, and the internally threaded pipe 9 is pre-embedded in the precast concrete column; the double-conical connecting column 8 can also be made of steel, depending on the specific requirements.

[0043] like Figure 2 , 3 As shown in Figure 4, a connecting rod 10 is also provided inside the connecting pipe 2. A conical bracket 11 corresponding to the central tension sleeve 4 is welded and fixed to the connecting rod 10. A lower conical bracket 12 is welded and fixed near the lower end of the connecting rod 10. The lower conical bracket 12 is embedded in the double conical tension sleeve 3. The contact surfaces of the central tension sleeve 4 and the central conical bracket 11, as well as the contact surfaces of the double conical tension sleeve 3 and the lower conical bracket 12, are all conical surfaces. The central conical bracket 11 expands the central tension sleeve 4, causing the outer wall of the central tension sleeve 4 to abut against the inner wall of the connecting pipe 2, increasing the stability of the support. The upper end of the connecting rod 10 is screwed into the internal threaded pipe 9 of the precast wall body 1 where it is located, and the lower end of the connecting rod 10 is screwed into the internal threaded pipe 9 of the adjacent precast wall body 1 on the lower layer. The lower conical bracket 12 and the double conical connecting column 8 are respectively embedded on the upper and lower sides of the double conical tensioning sleeve 3. The lower conical bracket 12 and the double conical connecting column 8 are connected into one unit through the double conical tensioning sleeve 3, which further increases the stability of the connection between the upper and lower precast wall bodies.

[0044] like Figure 6 and 8 As shown, both the middle conical support 11 and the lower conical support 12 include an inner connecting cylinder 13 and an outer conical cylinder 14. The inner connecting cylinder 13 is welded and fixedly connected to the connecting rod 10. A connecting plate 15 is welded and fixed between the inner connecting cylinder 13 and the outer conical cylinder 14 at intervals. A vertical connecting hole 16 is formed between adjacent connecting plates 15. A transverse through hole 17 is also provided on the connecting plate 15. Adjacent vertical connecting holes 16 are connected through the transverse through hole 17.

[0045] likeFigure 6 and 11 As shown, a sealing airbag 18 is provided at the vertical connecting hole 16 of the conical bracket 11. The sealing airbag 18 is made of elastic rubber material similar to a balloon, which can burst under pressure. The sealing airbag 18 includes an annular airbag piece 19. The inner side of the annular airbag piece 19 is bonded to the upper end of the inner connecting cylinder 13, and the outer side is bonded to the upper end of the outer conical cylinder 14, thus sealing the upper end of the vertical connecting hole 16. By setting the sealing airbag 18, the resistance of grouting is increased. As the concrete grout is injected, only after the adjacent sealing airbag 18 bursts can the concrete continue to move upward through the vertical connecting hole 16, making the injected concrete grout more compact and preventing the injected concrete grout from rising too quickly and having a high porosity. Using the sealing airbag 18 can increase resistance, and it is also low in cost, simple in structure, and easy to install.

[0046] like Figure 1 As shown, grouting holes 20 are provided at both the upper and lower ends of the side wall of the precast wall body 1. The grouting holes 20 are connected to the connecting pipe 2. The grouting holes 20 are used to inject concrete grout into the connecting pipe 2. After the concrete solidifies, it is used to increase the support strength at the connecting pipe 2.

[0047] The production method of the precast wall body 1 is as follows:

[0048] 1) The middle tensioning sleeve 4 is fitted onto the middle conical bracket 11, and the upper side of the double conical tensioning sleeve 3 is fitted onto the lower conical bracket 12. The fitting here only needs to ensure that the middle tensioning sleeve 4 and the double conical tensioning sleeve 3 are not easy to fall off during subsequent assembly. They do not need to be fully embedded, so as to facilitate the adjustment of the vertical position of the connecting rod 10 during subsequent assembly. The middle conical bracket 11 and the lower conical bracket 12 are welded and fixed to the connecting rod 10. A conical positioning sleeve is fitted onto the upper end of the connecting rod 10. The conical positioning sleeve is embedded in the tensioning sleeve 5. The relative position of the connecting rod 10 and the tensioning sleeve 5 is positioned by the conical positioning sleeve to prevent the connecting rod 10 from shaking in the connecting pipe 2 during the subsequent production or transportation of the precast wall body 1. The conical positioning sleeve is a rubber conical block, but it can also be made of other materials, such as wood or steel conical blocks.

[0049] 2) Place the connecting rod 10 processed in step 1) into the connecting tube 2, then drill holes at the positions corresponding to the double conical tension sleeve 3, the middle tension sleeve 4 and the upper tension sleeve 5, and install the pin 7. Weld the pin 7 to the connecting tube 2 for fixation. Alternatively, holes can be drilled in the connecting tube 2 and the corresponding tension sleeve in advance, and the pin 7 can be installed directly.

[0050] 3) Place the reinforcing cage and the connecting pipe 2 processed in step 2) into the mold. Fix the connecting pipe 2 to the reinforcing cage with steel wire to prevent the position of the connecting pipe 2 from shifting. Seal both ends of the connecting pipe 2 to prevent concrete from entering. Then pour concrete, vibrate and cure it to obtain the precast wall body 1.

[0051] Example 2

[0052] This embodiment is basically the same as Embodiment 1, except that, as Figure 4 and 7 As shown, the double-cone type tensioning sleeve 3 includes a tensioning sleeve body 21. The tensioning sleeve body 21 is provided with an upper conical groove 22, an equal diameter groove 23 and a lower conical groove 24 from top to bottom. The smaller end of the upper conical groove 22 and the lower conical groove 24 is close to the equal diameter groove 23. The equal diameter groove 23 is connected to the vertical connecting hole 16 of the lower conical bracket 12, so that the injected concrete slurry can flow into the equal diameter groove 23 through the vertical connecting hole 16.

[0053] like Figure 4 As shown, the double-conical connecting column 8 includes a central frustum 25, with conical truncated sections 26 at both its upper and lower ends. A constant-diameter column 27 is located at the end of each conical truncated section 26 away from the central frustum 25. The central frustum 25, conical truncated sections 26, and constant-diameter column 27 form a single integrated structure. A threaded groove 28 is provided on the side wall of the constant-diameter column 27. The upper conical truncated section 26 is embedded in the lower conical groove 24 of the upper precast wall body, and the upper constant-diameter column 27 is placed in the constant-diameter groove 23. The lower conical truncated section 26 is embedded in the rising sleeve 5 of the precast wall body 1, and the lower constant-diameter column 27 passes through the rising sleeve 5 and is placed inside the connecting pipe 2. An assembly groove 29 that mates with the central frustum 25 is provided at the upper end of the precast wall body 1. The double-conical connecting column 8 connects the upper and lower precast wall bodies, and the threaded groove 28 increases the connection stability between the concrete and the double-conical connecting column 8.

[0054] Example 3

[0055] The construction method of the prefabricated wall structure described in Example 1 or Example 2 includes the following steps:

[0056] (1) Produce the precast wall body 1, then transport it to the construction site, and hoist the precast wall body 1 located on the upper floor, such as... Figure 3 and 4 As shown, the double-conical tensioning sleeve 3 of the upper precast wall body is aligned with the double-conical connecting column 8 of the assembled lower precast wall body. The upper precast wall body is moved down, and the double-conical connecting column 8 is embedded in the lower side of the double-conical tensioning sleeve 3. At the same time, the double-conical connecting column 8 will push the connecting rod 10 of the upper precast wall body to move up. The connecting rod 10 drives the conical positioning sleeve to disengage from the tensioning sleeve 5. The conical positioning sleeve can be removed from the connecting rod 10 and can be recycled and reused.

[0057] (2) Rotate the connecting rod 10 of the upper precast wall body in the circumferential direction so that the lower end of the connecting rod 10 is screwed into the internal threaded pipe 9 of the lower precast wall body. At the same time, the connecting rod 10 drives the middle conical bracket 11 and the lower conical bracket 12 to move down. The middle conical bracket 11 is embedded in the middle tension sleeve 4, and the lower conical bracket 12 is embedded in the upper side of the double conical tension sleeve 3.

[0058] (3) Then, install the double-cone connecting column 8 of the upper precast wall body. Rotate the double-cone connecting column 8 so that the upper end of the connecting rod 10 is screwed into the internal threaded pipe 9, and the lower end of the double-cone connecting column 8 is embedded in the tightening sleeve 5 (e.g., Figure 5 (as shown);

[0059] (4) Concrete grout is injected through the grouting hole 20 on the lower side of the connecting pipe 2. As the concrete grout is injected, the adjacent sealing airbags 18 rupture. The concrete grout moves upward through the vertical connecting hole 16 of the middle cone bracket 11. The sealing airbags 18 rupture one by one from bottom to top. Finally, the concrete grout flows out from the upper grouting hole 20, completing the grouting.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated wall assembly, comprising a prefabricated wall body, characterized in that: A vertically penetrating connecting pipe is pre-embedded within the precast wall body. From bottom to top, the connecting pipe contains a double-cone tensioning sleeve, a middle tensioning sleeve, an upper tensioning sleeve, and a double-cone connecting column. The lower end of the double-cone connecting column is embedded in the upper tensioning sleeve, and the upper end is embedded in the double-cone tensioning sleeve of the upper precast wall body. A vertical internally threaded pipe is installed within the double-cone connecting column. A connecting rod is also installed within the connecting pipe. A middle cone bracket corresponding to the middle tensioning sleeve is fixed to the connecting rod. A lower cone bracket is fixed near the lower end of the connecting rod and is embedded in the double-cone tensioning sleeve. The upper end of the connecting rod is screwed into the internally threaded pipe, and the lower end is screwed into the internally threaded pipe of the lower precast wall body. Vertical connecting holes are provided on both the middle and lower cone brackets. A sealing airbag is installed at the vertical connecting hole of the middle cone bracket. Grouting holes are provided at both the upper and lower ends of the connecting pipe.

2. The prefabricated wall structure according to claim 1, characterized in that: The double-cone type tensioning sleeve includes a tensioning sleeve body. The tensioning sleeve body is provided with an upper conical groove, an equal diameter groove and a lower conical groove from top to bottom. The smaller inner diameter end of the upper conical groove and the lower conical groove is close to the equal diameter groove. The equal diameter groove is connected to the vertical connecting hole of the lower conical bracket.

3. A prefabricated wall assembly according to claim 2, characterized in that: The double-cone connecting column includes a central truncated cone, with a cone at both the upper and lower ends of the central truncated cone. A column of equal diameter is provided at the end of the cone away from the central truncated cone. The side wall of the column of equal diameter is provided with a threaded groove. The upper cone is embedded in the lower cone groove, and the upper column of equal diameter is placed in the equal diameter groove. The lower cone is embedded in the rising tight sleeve, and the lower column of equal diameter passes through the rising tight sleeve and is placed in the connecting pipe. The upper end of the precast wall body is provided with an assembly groove that mates with the central truncated cone.

4. A prefabricated wall assembly according to claim 1, characterized in that: Both the middle conical support and the lower conical support include an inner connecting cylinder and an outer conical cylinder. The inner connecting cylinder is fixedly connected to the connecting rod. A connecting plate is fixed between the inner connecting cylinder and the outer conical cylinder at intervals. A vertical connecting hole is formed between adjacent connecting plates. A horizontal through hole is also provided on the connecting plate. Adjacent vertical connecting holes are connected through the horizontal through hole.

5. A prefabricated wall assembly according to claim 4, characterized in that: The sealing airbag includes an annular airbag sheet, the inner side of which is bonded to the upper end of the inner connecting cylinder, and the outer side of which is bonded to the upper end of the outer conical cylinder.

6. A prefabricated wall assembly according to claim 1, characterized in that: The double-cone type tensioning sleeve, the intermediate tensioning sleeve, and the upper tensioning sleeve are all connected to the connecting pipe by a pin. One end of the pin is embedded in the precast wall body, and the other end passes through the connecting pipe and slides in the corresponding tensioning sleeve. The pin is fixedly connected to the connecting pipe.

7. A prefabricated wall assembly according to claim 1 or 6, characterized in that: The upper and lower ends of the double-cone type tensioning sleeve, the intermediate tensioning sleeve, and the upper tensioning sleeve are all provided with axial opening grooves.

8. A construction method for a prefabricated wall assembly as described in any one of claims 1-7, characterized in that, Includes the following steps: (1) Produce the precast wall body, then transport it to the construction site, hoist the upper precast wall body, and embed the double cone connecting column of the lower precast wall body into the lower side of the double cone tensioning sleeve of the upper precast wall body; (2) Rotate the connecting rod of the upper precast wall body in the circumferential direction so that the lower end of the connecting rod is screwed into the internal threaded pipe of the lower precast wall body. At the same time, the connecting rod drives the middle conical bracket and the lower conical bracket to move down. The middle conical bracket is embedded in the middle tension sleeve, and the lower conical bracket is embedded in the upper side of the double conical tension sleeve. (3) Then install the double-cone connecting column of the upper precast wall body, rotate the double-cone connecting column so that the upper end of the connecting rod is screwed into the internal threaded pipe and the lower end of the double-cone connecting column is embedded in the tightening sleeve. (4) Inject concrete grout through the grouting hole on the lower side of the connecting pipe. As the concrete grout is injected, the adjacent sealing airbags rupture. The concrete grout moves upward through the vertical connecting hole of the middle cone-shaped support. The sealing airbags rupture one by one from bottom to top. Finally, the concrete grout flows out from the upper grouting hole, completing the grouting.

9. The construction method according to claim 8, characterized in that, In step (1), the production method of the precast wall body is as follows: 1) The middle tensioning sleeve is fitted onto the middle conical bracket, the upper side of the double conical tensioning sleeve is fitted onto the lower conical bracket, the middle conical bracket and the lower conical bracket are fixed onto the connecting rod, and a conical positioning sleeve is fitted onto the upper end of the connecting rod, the conical positioning sleeve is embedded in the tensioning sleeve; 2) Place the connecting rod processed in step 1) into the connecting tube, and then install the pins at the positions corresponding to the double conical tensioning sleeve, the middle tensioning sleeve and the upper tensioning sleeve; 3) Place the steel cage and the connecting pipe treated in step 2) into the mold, pour concrete, vibrate and cure to obtain the precast wall body.

10. The construction method according to claim 9, characterized in that, In step (1), the double-conical connecting column of the lower precast wall body is embedded in the double-conical tensioning sleeve of the upper precast wall body. At the same time, the double-conical connecting column will push the connecting rod of the upper precast wall body to move upward. The connecting rod will drive the conical positioning sleeve to disengage from the tensioning sleeve. The conical positioning sleeve will be removed from the connecting rod, and then step (2) will be performed.

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