Fabricated building prefabricated outer wall abutted seam waterproof structure and method

Abstract

The assembly type building prefabricated outer wall abutted seam waterproof structure comprises an upper wall body unit and a lower wall body unit, the lower surface of the upper wall body unit is provided with an upper embedding part, the upper surface of the lower wall body unit is provided with a lower embedding part, and the lower embedding part is covered with an air bag; when the upper wall body unit is hoisted to the lower wall body unit, the upper embedding part abuts against the surface of the air bag, splicing of the upper embedding part and the lower embedding part is completed step by step in the mode that the air bag is deflated, a containing cavity used for containing the air bag is formed between the upper embedding part and the lower embedding part, a glue injection pipe is embedded in the upper wall body unit and communicates with a plurality of branch pipes, and the branch pipes communicate with the upper embedding part and the lower embedding part. The multiple branch pipes communicate with the lower surface of the upper embedding part, the waterproof glue is discharged from the lower surface of the upper embedding part after passing through the glue injection pipe and the branch pipes, the upper surface of the air bag is fixedly bonded to the lower surface of the upper embedding part, and the safety in the embedding process of the vertically adjacent wall units and the waterproof effect of the embedding position of the two wall units are improved.

Description

Technical Field

[0001] The present application relates to the field of prefabricated buildings, and in particular to a prefabricated exterior wall joint waterproofing structure and method for prefabricated buildings. Background Art

[0002] Prefabricated buildings are a type of construction method that disassembles the building's structural parts, such as wall panels, columns, beams, floor slabs, and stairs, into certain specifications, prefabricates them in the factory, and then transports them to the site for assembly. This method has many advantages, such as improving resource utilization, reducing dust pollution, and being beneficial to environmental protection. It has been rapidly developed and widely used in China. However, prefabricated buildings have certain limitations in terms of waterproof performance, because their assembly method will form a large number of joints, which can easily become channels for water to penetrate.

[0003] In the related art, the exterior wall of an assembled building includes a number of wall units that are spliced ​​together, wherein horizontal joints are formed between the upper and lower adjacent wall units, and vertical joints are formed between the left and right adjacent wall units. Drain pipes and sealants are arranged at the vertical joints to discharge water that penetrates into the vertical joints of the wall, and the joints between the upper and lower adjacent wall units are designed to be a tongue-and-groove shape with a high inside and a low outside. The outermost side of the wall unit adopts highly elastic weather-resistant waterproof silicone, and the middle part is a decompression space formed by a physical cavity. The inner side of the wall unit uses waterproof rubber strips pre-embedded in the concrete to press each other up and down to achieve a waterproof effect.

[0004] Regarding the above-mentioned related technologies, there are the following defects: when assembling the exterior wall, the wall units are all hoisted. Since the joints between the upper and lower adjacent wall units are designed to be a tongue-and-groove shape with the inside higher and the outside lower, during the actual assembly process, it is easy for collisions to cause cracks at the joint positions, thereby affecting the waterproof effect. Therefore, there is still room for improvement. Summary of the invention

[0005] In order to improve the safety during the interlocking process of upper and lower adjacent wall units and the waterproof effect at the interlocking position of the two, the present application provides a prefabricated exterior wall joint waterproofing structure and method for an assembled building.

[0006] The present application provides a prefabricated building exterior wall joint waterproof structure and method using the following technical solutions: A prefabricated exterior wall joint waterproof structure for an assembled building comprises an upper wall unit and a lower wall unit, wherein the lower surface of the upper wall unit is provided with an upper engaging portion, and the upper surface of the lower wall unit is provided with a lower engaging portion, and the lower engaging portion is covered with an air bag; when the upper wall unit is hoisted to the lower wall unit, the upper engaging portion abuts against the surface of the air bag, and the assembly of the upper engaging portion and the lower engaging portion is gradually completed by deflating the air bag, and a accommodating chamber for accommodating the air bag is formed between the upper engaging portion and the lower engaging portion.

[0007] By adopting the above technical scheme, an upper embedding part and a lower embedding part are respectively provided at the corresponding splicing positions of the upper wall unit and the lower wall unit, and an airbag is covered at the lower embedding part. During the assembling steps of the upper and lower wall units, the airbag plays a buffering and protective effect, which is beneficial to reducing the direct collision between the upper embedding part and the lower embedding part. Then, by deflating the airbag, the upper wall unit is slowly moved downward until the upper embedding part and the lower embedding part are completely assembled, which is beneficial to the safety during the embedding process of the upper and lower adjacent wall units. The airbag is accommodated in the accommodating chamber between the upper embedding part and the lower embedding part, so that the airbag forms a blocking structure at the joint between the upper wall unit and the lower wall unit, which is beneficial to improving the waterproof effect at the embedding position of the upper and lower adjacent wall units.

[0008] Preferably, a glue injection pipe is buried in the upper wall unit, the glue injection pipe is connected to a plurality of branch pipes, and the plurality of branch pipes are connected to the lower surface of the upper engaging portion.

[0009] By adopting the above technical solution, a glue injection pipe is buried inside the upper wall unit, and the glue injection pipe and the lower surface of the upper fitting part are connected through a plurality of branch pipes. Therefore, after the upper wall unit and the lower wall unit are assembled, waterproof glue can be injected into the glue injection pipe, and the waterproof glue can be discharged from the lower surface of the upper fitting part after passing through the glue injection pipe and the branch pipe, so that the upper surface of the airbag is adhered to the lower surface of the upper fitting part, which is beneficial to further improve the waterproof effect at the joint position between the upper wall unit and the lower wall unit.

[0010] Preferably, the glue injection tube is arranged obliquely, and the inclined upper end of the glue injection tube is the feeding end of the glue injection tube.

[0011] By adopting the above technical solution, the glue injection tube is arranged to be inclined so that the waterproof glue can flow smoothly from the inclined upper end to the inclined lower end of the glue injection tube.

[0012] Preferably, the inclined lower end of the glue injection tube is connected to the outside of the wall of the upper wall unit.

[0013] By adopting the above technical solution, the inclined lower end of the glue injection tube is connected to the outside of the wall of the upper wall unit. When the waterproof glue is injected into the inclined upper end of the glue injection tube, the air in the glue injection tube can be squeezed out from the inclined lower end of the glue injection tube, so that the waterproof glue can be smoothly injected into the glue injection tube. When the waterproof glue is discharged from the inclined lower end, the inclined lower end is blocked in time, so that the waterproof glue can flow and be discharged in multiple branch pipe directions, so that the waterproof glue can be coated on the upper surface of the airbag.

[0014] Preferably, the airbag is fixed to the surface of the lower fitting portion by means of waterproof adhesive.

[0015] By adopting the above technical solution, the airbag is adhered to the surface of the lower fitting part with waterproof glue, which improves the stability of the airbag and also improves the waterproof effect of the gap between the airbag and the lower fitting part.

[0016] Preferably, an air pipe is buried in the lower wall unit, one end of the air pipe is connected to the air bag, and the other end of the air pipe is connected to the outside of the wall of the lower wall unit.

[0017] By adopting the above technical solution, an air pipe is buried in the lower wall unit, and the air bag and the outside of the wall of the lower wall unit are connected by the air pipe, so that the air bag inside the lower wall unit can be inflated and deflated from the outside of the lower wall unit, which is beneficial to control the expansion and contraction of the air bag.

[0018] A method for waterproofing the joints of prefabricated exterior walls of assembled buildings, using a waterproof structure for the joints of prefabricated exterior walls of assembled buildings, comprising the following steps: S1: hoisting the lower wall unit to the construction position, fixing the airbag and covering it on the surface of the lower fitting part, and inflating the airbag so that the airbag protrudes from the upper surface of the lower wall unit; S2: The upper wall unit is hoisted onto the lower wall unit, the upper engaging portion of the upper wall unit first contacts the surface of the airbag, and then the airbag is deflated, so that the upper wall unit gradually moves downward until the upper engaging portion and the lower engaging portion are assembled, and a receiving chamber is formed between the upper engaging portion and the lower engaging portion, and the airbag is received in the receiving chamber.

[0019] By adopting the above technical solution, during the step of assembling the upper and lower wall units, the airbag plays a buffering and protective role, which is beneficial to reducing the direct collision between the upper interlocking part and the lower interlocking part. Then, by deflating the airbag, the upper wall unit slowly moves downward until the upper interlocking part and the lower interlocking part are assembled, which is beneficial to the safety during the interlocking process of the upper and lower adjacent wall units. The airbag is stored in the accommodating chamber between the upper interlocking part and the lower interlocking part, so that the airbag forms a blocking structure at the joint between the upper wall unit and the lower wall unit, which is beneficial to improving the waterproof effect at the interlocking position of the upper and lower adjacent wall units.

[0020] Preferably, S3: inject waterproof glue into the inclined upper end of the glue injection tube, and squeeze the air in the glue injection tube out from the inclined lower end of the glue injection tube. When the waterproof glue is discharged from the inclined lower end of the glue injection tube, the inclined lower end is blocked in time to make the waterproof glue flow and discharge in the direction of multiple branches and be coated on the upper surface of the airbag.

[0021] By adopting the above technical solution, after the upper wall unit and the lower wall unit are assembled, waterproof glue is injected into the glue injection pipe, and the waterproof glue is discharged from the lower surface of the upper mosaic part after passing through the glue injection pipe and the branch pipe, so that the upper surface of the airbag is adhered to the lower surface of the upper mosaic part, which is beneficial to further improve the waterproof effect at the joint position between the upper wall unit and the lower wall unit.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By respectively setting an upper fitting part and a lower fitting part at the corresponding joint positions of the upper wall unit and the lower wall unit, and covering the lower fitting part with an air bag, the air bag plays a buffering and protective role in the assembly steps of the upper and lower wall units, which is conducive to reducing the direct collision between the upper fitting part and the lower fitting part. Then, by deflating the air bag, the upper wall unit is slowly moved downward until the upper fitting part and the lower fitting part are assembled, which is conducive to the safety of the fitting process of the upper and lower adjacent wall units; 2. The airbag is accommodated in the accommodating chamber between the upper fitting part and the lower fitting part, so that the airbag forms a blocking structure at the joint between the upper wall unit and the lower wall unit, which is beneficial to improve the waterproof effect at the fitting position of the upper and lower adjacent wall units; 3. A glue injection pipe is buried inside the upper wall unit, and the glue injection pipe and the lower surface of the upper fitting part are connected through a plurality of branch pipes, so that after the upper wall unit and the lower wall unit are assembled, waterproof glue can be injected into the glue injection pipe, and the waterproof glue can be discharged from the lower surface of the upper fitting part after passing through the glue injection pipe and the branch pipe, so that the upper surface of the airbag is adhered to the lower surface of the upper fitting part, which is conducive to further improving the waterproof effect at the joint position between the upper wall unit and the lower wall unit; 4. By connecting the inclined lower end of the glue injection tube with the outside of the wall of the upper wall unit, when the waterproof glue is injected into the inclined upper end of the glue injection tube, the air in the glue injection tube can be squeezed out from the inclined lower end of the glue injection tube, so that the waterproof glue can be smoothly injected into the glue injection tube. When the waterproof glue is discharged from the inclined lower end, the inclined lower end is blocked in time, so that the waterproof glue can flow and be discharged in multiple branch pipe directions, so that the waterproof glue can be coated on the upper surface of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present application discloses a schematic plan view of a prefabricated exterior wall joint waterproof structure for an assembled building.

[0024] Explanation of the reference numerals: 1. upper wall unit; 11. upper fitting portion; 12. glue injection tube; 2. lower wall unit; 21. lower fitting portion; 22. air pipe; 3. air bag. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 This application is described in further detail.

[0026] The present application discloses a prefabricated exterior wall joint waterproof structure for an assembled building, referring to Figure 1 , including an upper wall unit 1 and a lower wall unit 2, the lower surface of the upper wall unit 1 is provided with an upper embedding portion 11, and the upper embedding portion 11 is located at the outer side of the upper wall unit 1, and the upper surface of the lower wall unit 2 is provided with a lower embedding portion 21, and the lower embedding portion 21 is located at the outer side of the lower wall unit 2, and the upper embedding portion 11 and the lower embedding portion 21 are both in a tongue-and-groove shape with a low outside and a high inside.

[0027] In this embodiment, the surface of the lower interlocking portion 21 is covered with an airbag 3, and the airbag 3 is fixed to the surface of the lower interlocking portion 21 by waterproof glue, which improves the stability of the airbag 3 and the waterproof effect of the gap between the airbag 3 and the lower interlocking portion 21. In addition, a plurality of glue injection tubes 12 are buried in the lower position of the upper wall unit 1, and the plurality of glue injection tubes 12 are distributed in the length direction of the upper wall unit 1 and extend along the contour of the upper interlocking portion 11. The glue injection tubes 12 are arranged obliquely, and the inclined upper end of the glue injection tube 12 is the feed end of the glue injection tube 12. The inclined lower end of the glue injection tube 12 is connected to the outer wall of the upper wall unit 1, and the inclined upper end of the glue injection tube 12 is connected to the inner wall of the upper wall unit 1. The glue injection tube 12 is connected to a plurality of branch pipes, and the plurality of branch pipes are distributed at equal intervals along the extension direction of the glue injection tube 12 and extend vertically downward, and the lower ends of the plurality of branch pipes are connected to the lower surface of the upper interlocking portion 11.

[0028] In this embodiment, an air pipe 22 is buried in the lower wall unit 2, one end of the air pipe 22 is connected to the air bag 3, and the other end is connected to the outer wall of the lower wall unit 2, and the air pipe 22 is arranged horizontally. The air bag 3 inside the lower wall unit 2 can be inflated and deflated from the outside of the lower wall unit 2 to control the expansion and contraction of the air bag 3.

[0029] A method for waterproofing the joints of prefabricated exterior walls of assembled buildings, using a waterproof structure for the joints of prefabricated exterior walls of assembled buildings, comprising the following steps: S1: The upper wall unit 1 and the lower wall unit 2 are prefabricated in the factory, and the hoisting order is determined according to the design drawings. The hoisting points of the upper wall unit 1 and the lower wall unit 2 are embedded parts matching the hoisting tools and pre-embedded in both sides of the upper wall unit 1 and the lower wall unit 2. Then the upper wall unit 1 and the lower wall unit 2 are transported to the construction site.

[0030] Use a tower crane or a truck crane to slowly lift the lower wall unit 2. When the bottom surface of the lower wall unit 2 rises to a certain height (such as 600mm), pause for a while to check whether the hanging is firm and whether the board surface is contaminated or damaged. After confirming that there is no problem, slowly lift it to the construction location. After the lower wall unit 2 is in place, use an adjustable steel support to temporarily fix it. At the same time, use an adjustable inclined support screw to fix the lower wall unit 2 to ensure the stability of the lower wall unit 2. Then use waterproof glue to glue the airbag 3 to the lower fitting part 21 of the lower wall unit 2. The airbag 3 is completely covered on the surface of the lower fitting part 21. Then, the airbag 3 is inflated through the air pipe 22 to make the airbag 3 protrude from the upper surface of the lower wall unit 2.

[0031] S2: Then the upper wall unit 1 is hoisted onto the lower wall unit 2. The upper interlocking portion 11 of the upper wall unit 1 first contacts the surface of the airbag 3. The airbag 3 plays a buffering and protective role, which is beneficial to reduce the direct collision between the upper interlocking portion 11 and the lower interlocking portion 21. Then the airbag 3 is deflated, so that the upper wall unit 1 gradually moves downward. During the downward movement of the upper wall unit 1, the crane keeps the weight and shares the load for the airbag 3 to control the downward movement speed of the upper wall unit 1. During the process, the position of the upper wall unit 1 is adjusted until the assembly steps of the upper interlocking portion 11 and the lower interlocking portion 21 are completed, which is beneficial to the safety of the upper and lower adjacent wall units during the interlocking process. A accommodating chamber is formed between the upper interlocking portion 11 and the lower interlocking portion 21, and the airbag 3 is accommodated in the accommodating chamber.

[0032] S3: Then the airbag 3 continues to deflate for a short period of time, so that a glue injection gap is formed between the upper surface of the airbag 3 and the surface of the upper fitting 11, and then the waterproof glue is injected into the inclined upper end of the glue injection tube 12, and the air in the glue injection tube 12 is squeezed out from the inclined lower end of the glue injection tube 12. When the waterproof glue is discharged from the inclined lower end of the glue injection tube 12, the inclined lower end is blocked in time to make the waterproof glue flow and discharge in the direction of multiple branches and be coated on the upper surface of the airbag 3. Then the airbag 3 is inflated, and the waterproof glue is squeezed during the expansion of the airbag 3, so that the waterproof glue is more evenly distributed on the upper surface of the airbag 3 until the upper surface of the airbag 3 is adhered to the surface of the upper fitting 11. During the inflation process of the airbag 3, the pressure value of the air supply equipment is always paid attention to to reduce the probability of the airbag 3 rupture caused by the inflation transition.

[0033] In this embodiment, the waterproof glue can be MS sealant or silane-modified polyether sealant to ensure good adhesion between the waterproof glue and the airbag 3 and the prefabricated exterior wall materials of the assembled building, and to ensure the stability and durability of the waterproof structure.

[0034] The airbag 3 is accommodated in a accommodating chamber formed between the upper interlocking portion 11 and the lower interlocking portion 21. The waterproof glue combines the airbag 3 in the accommodating chamber, thereby forming a sealing structure at the joint between the upper wall unit 1 and the lower wall unit 2, which is beneficial to improving the waterproof effect at the interlocking position of the upper and lower adjacent wall units.

[0035] In this embodiment, the upper wall unit 1 and the lower wall unit 2 are connected by sleeve grouting to achieve a firm connection between the upper wall unit and the lower wall unit, which has high connection strength and good durability. After the lower wall unit 2 is assembled, a sealant layer is provided at the outermost joint between the lower wall unit 2 and the upper wall unit 1. The sealant layer is specifically a highly elastic weather-resistant and waterproof silica gel, and the connecting iron pieces on the inner side of the lower wall unit 2 and the upper wall unit 1 are sealed with polyurethane.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A prefabricated exterior wall joint waterproof structure for an assembled building, characterized in that: The invention comprises an upper wall unit (1) and a lower wall unit (2), wherein the lower surface of the upper wall unit (1) is provided with an upper engaging portion (11), and the upper surface of the lower wall unit (2) is provided with a lower engaging portion (21), and the lower engaging portion (21) is covered with an air bag (3); when the upper wall unit (1) is hoisted onto the lower wall unit (2), the upper engaging portion (11) abuts against the surface of the air bag (3), and the assembly of the upper engaging portion (11) and the lower engaging portion (21) is gradually completed by deflating the air bag (3), and a accommodating chamber for accommodating the air bag (3) is formed between the upper engaging portion (11) and the lower engaging portion (21).

2. The prefabricated exterior wall joint waterproof structure of an assembled building according to claim 1, characterized in that: A glue injection pipe (12) is embedded in the upper wall unit (1), and the glue injection pipe (12) is connected to a plurality of branch pipes, and the plurality of branch pipes are connected to the lower surface of the upper embedded part (11).

3. The prefabricated exterior wall joint waterproof structure of an assembled building according to claim 2, characterized in that: The glue injection tube (12) is arranged obliquely, and the inclined upper end of the glue injection tube (12) is the feeding end of the glue injection tube (12).

4. The prefabricated exterior wall joint waterproof structure of an assembled building according to claim 3, characterized in that: The inclined lower end of the glue injection tube (12) is in communication with the outside of the wall of the upper wall unit (1).

5. The prefabricated exterior wall joint waterproof structure of an assembled building according to claim 1, characterized in that: The airbag (3) is fixed to the surface of the lower engaging portion (21) by means of waterproof glue.

6. The prefabricated exterior wall joint waterproof structure of an assembled building according to claim 1, characterized in that: An air pipe (22) is buried in the lower wall unit (2); one end of the air pipe (22) is connected to the air bag (3), and the other end is connected to the outside of the wall of the lower wall unit (2).

7. A method for waterproofing the joints of prefabricated exterior walls of assembled buildings, using the waterproof structure for the joints of prefabricated exterior walls of assembled buildings as claimed in claim 3, characterized in that: The following steps are involved: S1: hoisting the lower wall unit to the construction position, fixing the airbag and covering it on the surface of the lower fitting part, and inflating the airbag so that the airbag protrudes from the upper surface of the lower wall unit; S2: The upper wall unit is hoisted onto the lower wall unit, the upper engaging portion of the upper wall unit first contacts the surface of the airbag, and then the airbag is deflated, so that the upper wall unit gradually moves downward until the upper engaging portion and the lower engaging portion are assembled, and a receiving chamber is formed between the upper engaging portion and the lower engaging portion, and the airbag is received in the receiving chamber.

8. A method for waterproofing the joints of prefabricated exterior walls of assembled buildings according to claim 7, characterized in that: S3: injecting waterproof glue into the inclined upper end of the glue injection tube, and squeezing the air in the glue injection tube out from the inclined lower end of the glue injection tube. When the waterproof glue is discharged from the inclined lower end of the glue injection tube, the inclined lower end is blocked in time to make the waterproof glue flow and discharge in the direction of multiple branch pipes, and be coated on the upper surface of the airbag.

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