Water stop module for erecting overhanging external scaffold in high-rise building and blocking method

Abstract

The invention discloses a water stop module for erecting an overhanging outer scaffold in a high-rise building and a blocking method, and belongs to the field of overhanging outer scaffolds in high-rise building construction. The water stop module body is of a cuboid structure with openings in the two sides, a cantilever scaffold steel girder penetrates through a cavity defined by the four faces of the cuboid structure, and the scaffold is suspended on the outer wall of a building. Two connecting keys are arranged on the outer wall of the cuboid structure, are uniformly arranged on the outer wall of the water stop module main body and surround the outer wall by a circle; a circle of water stop strip mounting groove is formed in the center of the inner wall of the cuboid structure and surrounds the inner wall by a circle, and a water stop strip is mounted in the water stop strip mounting groove after profile steel is dismounted and before concrete is plugged. The section steel is convenient to recycle, the procedure of dismantling a multi-layer plate formwork is omitted, and a large amount of labor is saved; by arranging the connecting keys, the water stopping module and the outer wall of the building are reliably connected in an embedded mode; and the water swelling rubber water stop strip is arranged in the water stop module, so that the hidden danger of leakage of the outer wall is avoided.

Description

Technical Field

[0001] The invention relates to a water-stopping module and a blocking method for erecting a cantilevered external scaffolding of a high-rise building, and belongs to the field of cantilevered external scaffolding in high-rise building construction. Background Art

[0002] At present, the known technical solution for the steel section used in the cantilevered external scaffolding of high-rise building construction to pass through the building's outer wall is: using multi-layer boards and iron nails to make square modules and put them on the steel section to ensure that the steel section can be recycled after the outer wall concrete is poured. The existing technical solution has three major disadvantages: First, due to the insufficient strength of the modules made of multi-layer boards and iron nails, the modules are often deformed after the concrete is poured, resulting in the concrete wrapping the steel section, which brings great trouble to the recycling of the steel section; second, after the steel section is recycled, the multi-layer board module needs to be removed before the hole is blocked, because the outer wall concrete has been poured to completely compress and wrap the multi-layer board module tightly, and it is difficult to remove the module, which requires a lot of manpower; third, after the module is removed, the holes on the outer wall are all smooth surfaces, and it is easy to form fine gaps after using concrete to block, resulting in leakage of the outer wall.

[0003] Therefore, a new technical solution is urgently needed to solve the above problems. Summary of the invention

[0004] In order to overcome the shortcomings of existing high-rise building construction cantilevered external scaffolding, which causes concrete to wrap the steel, consumes a lot of manpower to remove the module, and causes leakage of the outer wall when the steel is passed through the outer wall of the building, the present invention provides a water-stopping module for the cantilevered external scaffolding of high-rise building construction and a sealing method.

[0005] The present invention provides a water-stop module device for a scaffold. The connecting keys arranged around the outer wall of the module can not only effectively combine the water-stop module with the building wall in the form of a bite, but also block the path of rainwater penetration. The water-swelling water-stop strip installed inside the water-stop module blocks the rainwater penetration path. When the water-swelling water-stop strip encounters water, the volume of the water-swelling water-stop strip expands, so that the water-stop strip installation groove and the water-swelling water-stop strip become closer, thereby blocking the rainwater penetration path, and ensuring that the hole in the outer wall of the high-rise building passing through the cantilevered external scaffolding steel main beam does not leak after being blocked.

[0006] The present invention provides a water-stop module for erecting a cantilevered external scaffolding of a high-rise building. The module is prefabricated with concrete or mortar having a strength not less than that of the concrete of the building's outer wall. The main body of the water-stop module is a rectangular structure with openings on two sides. The cavity surrounded by the four faces of the rectangular structure is for the cantilevered scaffolding steel main beam to pass through, so that the scaffolding is cantilevered on the building's outer wall. Two connecting keys are provided on the outer wall of the rectangular structure. The connecting keys are arranged on the outside of the water-stop module main body with a certain thickness. The two connecting keys are evenly and parallelly arranged on the outer wall of the water-stop module main body (around the outer wall), and the connecting keys are embedded in the building wall. A circle of grooves is provided in the center of the inner wall of the rectangular structure (around the inner wall). The groove is a water-stop strip installation groove. The water-stop strip is installed in the groove before the concrete is sealed after the steel is removed.

[0007] The connecting keys can ensure that the water-stop module forms a reliable embedded connection with the outer wall of the building. The two connecting keys are located on the outer wall of the main body of the water-stop module. The connecting keys are wrapped around the outer wall. The thickness is 1cm-5cm and the width is 2cm-15cm. The two connecting keys are arranged at about one quarter of the distance from the two ends of the module, that is, the distance between the two connecting keys is half of the module size.

[0008] The water stop strip is a water-swelling rubber water stop strip, and the water stop strip installation groove is located in the middle part of the inner side of the water stop module body. The depth of the water stop strip installation groove is half of the height of the water-swelling rubber water stop strip, and the width is the same as that of the water-swelling rubber water stop strip. That is, one half of the water-swelling rubber water stop strip is located in the installation groove, and the other half is located outside the installation groove. When concrete is subsequently filled into the water stop module, the water stop strip is mixed with the concrete.

[0009] The wall thickness of the water-stop module is 3cm-6cm, that is, the thickness of the four faces of the rectangular structure is 3cm-6cm.

[0010] Water-swelling rubber waterstop strips generally adopt the size specifications of 2cm*3cm.

[0011] The present invention provides a method for sealing a water-stop module for erecting a cantilevered external scaffolding in a high-rise building, comprising the following construction steps: S1. Water-stop module production: produce water-stop modules according to the above structure and maintain them until they reach 100% strength; S2. Transportation of water-stop modules: Manual transportation with tower cranes and other mechanical equipment to transport the water-stop modules to the floor; S3, installation of water-stop module: after the concrete pouring of the cantilevered external scaffolding floor is completed and before the initial setting, the water-stop module is positioned according to the steel section position in the cantilevered external scaffolding construction plan, and the water-stop module is vibrated while being pressed downward so that the connection key on the bottom surface is just pressed into the concrete, and the outer wall of the water-stop module is flush with the surface of the concrete structure, and then smoothed with an iron trowel to ensure that the water-stop module is tightly combined with the floor concrete; S4. Erection and removal of cantilever external scaffolding: Erection and removal of cantilever external scaffolding; S5. Installation of water-swellable rubber waterstop strip: fully apply adhesive to the middle waterstop strip installation groove of the waterstop module, and then press the water-swellable rubber waterstop strip into the installation groove for fixing; S6. Casting concrete inside the water-stop module: Use a template made of multi-layer boards to seal the two ends of the opening of the water-stop module. Reserve a sloped notch for casting concrete on the indoor end template. The height of the sloped notch should be 5cm-10cm higher than the top of the water-stop module. The concrete used for casting should be micro-expansion concrete with a compressive strength one grade higher than that of the building's exterior wall concrete. While casting concrete, make at least one group of concrete curing test blocks under the same conditions and standard curing test blocks; S7. Removal of the formwork at both ends of the water-stop module: After the concrete strength in the water-stop module meets the strength conditions for removing the concrete side formwork, remove and clean the formwork at both ends.

[0012] S8. Concrete curing: After the concrete is finally set (the final setting time of concrete is generally 6h-10h), the poured concrete is sprinkled with water and covered with a film to ensure that the concrete is moist. The curing time is not less than 14 days. After the concrete age reaches 28 days, the strength of the standard curing test block and the test block cured under the same conditions are experimentally measured. Both meet the strength requirements of expansive concrete and are judged to be qualified in strength.

[0013] The horizontal length of the water-stop module is the same as the thickness of the outer wall of the building where the water-stop module is to be used. The inner width of the module is slightly larger than the width of the steel section used in the main beam of the scaffolding, and the inner height of the module is slightly larger than the height of the steel section used in the scaffolding. The height and width on each side are generally 1.0 cm larger than the steel section size.

[0014] Beneficial effects of the present invention: (1) It is convenient for recycling steel sections, eliminating the need to remove multi-layer board formwork and saving a lot of labor; (2) By setting a connection key, the water-stop module is reliably connected to the building's exterior wall; (3) By installing a water-swelling rubber waterstop strip inside the waterstop module, the quality risk of leakage on the exterior wall is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the water-stop module; Figure 2 for Figure 1 Left view of Figure 3 for Figure 1 Right view of; Figure 4 for Figure 1 A top view of Figure 5 for Figure 1 Bottom view of Figure 6 for Figure 4 Middle AA section; Figure 7 for Figure 4 Middle BB section; In the figure: 1- water stop module body, 2- water stop strip installation groove, 3- module outer wall, 4- module inner wall, 5- water stop strip; 6- connection key, 7 is a cavity. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only for illustrative purposes and are only schematic diagrams, not actual drawings, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0017] The present embodiment provides a water-stop module for cantilevered external scaffolding in high-rise building construction, which is made of C30 concrete with the same strength as the building's outer wall. The wall thickness of the water-stop module is 3 cm, and the length of the water-stop module is the same as the thickness of the building's outer wall, which is 30 cm. The width of the connecting key is 5 cm and the height is 1 cm. The depth of the rubber water-stop installation groove is 1 cm and the groove width is 2 cm. The size of the rubber water-stop is 2 cm*2 cm.

[0018] like Figure 1-7As shown, a water-stop module for erecting cantilevered external scaffolding in a high-rise building is prefabricated with concrete or mortar with a strength not less than that of the concrete of the building's outer wall. The main body 1 of the water-stop module is a rectangular structure with openings on two sides. The cavity 7 surrounded by the four faces of the rectangular structure is for the cantilevered scaffolding steel main beam to pass through, so that the scaffolding is cantilevered on the building's outer wall; two connecting keys 6 are provided on the outer wall of the rectangular structure, and the connecting keys 6 are arranged on the outside of the water-stop module main body 1 with a certain thickness. The two connecting keys are evenly and parallelly arranged on the outer wall of the water-stop module main body 1, and circle around the module outer wall 3. The connecting keys 6 are embedded in the building wall, and a circle of grooves is provided in the center of the inner wall of the rectangular structure, and circle around the module inner wall 4. The groove is the water-stop strip installation groove 2, and the water-stop strip 5 is installed in the groove before the concrete construction is sealed after the steel is removed.

[0019] The connecting key 6 can ensure that the water-stop module forms a reliable embedded connection with the outer wall of the building. Two connecting keys are located on the outer wall of the main body of the water-stop module. The connecting keys are wrapped around the four sides of the outer wall. The thickness is 1cm-5cm and the width is 2cm-15cm. The two connecting keys are arranged at about one quarter of the distance from the two ends of the module.

[0020] The water stop strip 5 is a water-swellable rubber water stop strip, and the water stop strip installation groove 2 is located in the middle of the inner side of the water stop module body 1. The depth of the water stop strip installation groove is half of the height of the water-swellable rubber water stop strip, and the width is the same as that of the water-swellable rubber water stop strip. That is, one half of the water-swellable rubber water stop strip is located in the installation groove, and the other half is located outside the installation groove. When concrete is subsequently filled into the water stop module, the water stop strip is mixed with the concrete.

[0021] The wall thickness of the water-stop module body 1 is 3 cm-6 cm, that is, the thickness of the four faces of the rectangular parallelepiped structure is 3 cm-6 cm.

[0022] Water-swelling rubber waterstop strips generally adopt the size specifications of 2cm*3cm.

[0023] The present invention provides a method for blocking a water-stop module for erecting a cantilevered external scaffolding in a high-rise building, which is described below through a specific implementation process, and the specific steps are: S1. Water-stop module production: produce water-stop modules according to the above structure and maintain them until they reach 100% strength; S2. Transportation of water-stop modules: 5 workers cooperate with QZ5013 tower crane and trolley to transport the water-stop modules to the 3rd floor where the cantilever external scaffolding is planned to be erected.

[0024] S3. Installation of water-stop modules: After the concrete pouring of the cantilevered external scaffolding floor is completed and before the initial setting, the water-stop modules are positioned according to the position of the steel sections in the cantilevered external scaffolding construction plan, and the water-stop modules are vibrated while applying downward force so that the connecting keys on the bottom surface are just pressed into the concrete. The outer wall of the water-stop module is flush with the outer surface of the concrete structure, and then it is smoothed with an iron trowel to ensure that the water-stop module is tightly combined with the floor concrete; the lateral spacing of the water-stop modules is the same as the steel section spacing in the construction plan, which is 1.5m. The outer side of the water-stop module is fully coated with a cement-based adhesive with a strength of not less than C30 and fixed to the installation position.

[0025] S4. Erection and removal of cantilever external scaffolding: Erection and removal of cantilever external scaffolding; S5. Installation of water-swellable rubber waterstop strip: Fully apply high-strength cement slurry adhesive in the middle waterstop strip installation groove of the waterstop module, and then press the water-swellable rubber waterstop strip into the installation groove for fixing; S6. Casting of concrete inside the water-stop module: Use a template made of multi-layer boards to seal the two ends of the opening of the water-stop module. Reserve a sloped notch for casting concrete on the indoor end template. The height of the sloped notch should be 5cm-10cm higher than the top of the water-stop module. Use micro-expansive concrete with a compressive strength one grade higher (C35) than that of the building's exterior wall concrete for casting. While casting concrete, make at least one group of concrete curing test blocks under the same conditions and standard curing test blocks; S7. Remove the formwork at both ends of the water-stop module: Wait until the concrete strength in the water-stop module meets the strength requirements for removing the concrete side formwork (reaching 4N / mm 2 ) After the conditions are met, remove and clean the templates at both ends; S8. Concrete curing: After the concrete is finally set (the final setting time of concrete is generally 6h-10h), the poured concrete is sprinkled with water and covered with a film to ensure that the concrete is moist. The curing time is not less than 14 days. After the concrete age reaches 28 days, the strength of the standard curing test block and the test block cured under the same conditions are experimentally measured. Both meet the strength requirements of expansive concrete and are judged to be qualified in strength.

[0026] The horizontal length of the water-stop module is the same as the thickness of the outer wall of the building where the water-stop module is to be used. The inner width of the module is slightly larger than the width of the steel section used in the main beam of the scaffolding, and the inner height of the module is slightly larger than the height of the steel section used in the scaffolding. The height and width on each side are generally 1.0 cm larger than the steel section size.

Claims

1. A water-stop module for erecting cantilevered external scaffolding in a high-rise building, characterized in that: The waterstop module is prefabricated with concrete or mortar with a strength not lower than that of the concrete of the building's exterior wall. The main body of the waterstop module is a rectangular structure with openings on two sides. The cavity surrounded by the four faces of the rectangular structure is for the cantilevered scaffolding steel main beam to pass through, so that the scaffolding is cantilevered on the building's exterior wall. Two connecting keys are provided on the outer wall of the rectangular structure. The two connecting keys are evenly arranged on the outer wall of the waterstop module main body, surrounding the outer wall. A circle of waterstop strip installation grooves is provided in the center of the inner wall of the rectangular structure. The groove surrounds the inner wall, and the waterstop strip is installed in the waterstop strip installation groove after removing the steel and before sealing the concrete.

2. The waterproof module for erecting cantilevered external scaffolding for high-rise buildings according to claim 1 is characterized in that: The connecting key is embedded in the building wall to ensure that the water-stop module forms a reliable embedded connection with the building's exterior wall. The two connecting keys are arranged in parallel, with a thickness of 1cm-5cm and a width of 2cm-15cm. The two connecting keys are arranged at one quarter of the distance from both ends of the module.

3. The waterproof module for erecting cantilevered external scaffolding for high-rise buildings according to claim 1 is characterized in that: The waterstop strip is a water-swelling rubber waterstop strip. The waterstop strip installation groove is located in the middle part of the inner side of the waterstop module body. The depth of the waterstop strip installation groove is half the height of the water-swelling rubber waterstop strip, and the width is the same as the water-swelling rubber waterstop strip. When concrete is subsequently filled into the waterstop module, the waterstop strip is mixed with the concrete.

4. The waterproof module for erecting cantilevered external scaffolding for high-rise buildings according to claim 3 is characterized in that: The size of the water-swelling rubber waterstop is 2cm*3cm.

5. The waterproof module for erecting cantilevered external scaffolding for high-rise buildings according to claim 1 is characterized in that: The wall thickness of the water-stop module body is 3cm-6cm.

6. A method for sealing a water-stop module for erecting a cantilevered external scaffolding in a high-rise building according to any one of claims 1 to 5, characterized in that The following steps are involved: S1. Water-stop module production: produce water-stop modules according to the above structure and maintain them until they reach 100% strength; S2. Transportation of water-stop modules: Manual transportation with tower cranes and other mechanical equipment to transport the water-stop modules to the floor; S3, installation of water-stop module: after the concrete pouring of the cantilevered external scaffolding floor is completed and before the initial setting, the water-stop module is positioned according to the steel section position in the cantilevered external scaffolding construction plan, and the water-stop module is vibrated while being pressed downward so that the connection key on the bottom surface is just pressed into the concrete, and the outer wall of the water-stop module is flush with the surface of the concrete structure, and then smoothed with an iron trowel to ensure that the water-stop module is tightly combined with the floor concrete; S4. Erection and removal of cantilever external scaffolding: Erection and removal of cantilever external scaffolding; S5. Installation of water-swellable rubber waterstop strip: fully apply adhesive to the middle waterstop strip installation groove of the waterstop module, and then press the water-swellable rubber waterstop strip into the installation groove for fixing; S6. Casting of concrete inside the water-stop module: Use a template made of multi-layer boards to seal the two ends of the opening of the water-stop module, reserve a sloped notch for casting concrete on the indoor end template, and use micro-expansion concrete with a compressive strength one grade higher than that of the building's exterior wall concrete for casting; while casting concrete, make at least one group of concrete curing test blocks under the same conditions and standard curing test blocks; S7, removing the templates at both ends of the water-stop module: after the concrete strength in the water-stop module meets the strength condition for removing the concrete side template, remove and clean the templates at both ends; S8. Concrete curing: After the concrete has finally set, the poured concrete shall be watered and covered with a film to ensure that the concrete is moist. The curing time shall be no less than 14 days. After the concrete age reaches 28 days, the strength of the standard curing test blocks and the test blocks cured under the same conditions shall be determined through experiments.

7. The method for sealing a water-stop module for erecting a cantilevered external scaffolding in a high-rise building according to claim 6, characterized in that: The horizontal length of the water-stop module is the same as the thickness of the outer wall of the building where the water-stop module is used. The inner width of the water-stop module is slightly larger than the width of the steel section used in the scaffolding main beam, and the inner height of the water-stop module is slightly larger than the height of the steel section used in the scaffolding. Both the width and height are 1.0 cm larger than the steel section size.

8. The method for sealing a water-stop module for erecting a cantilevered external scaffolding in a high-rise building according to claim 6, characterized in that: In step S6, the height of the sloped notch should be 5 cm-10 cm higher than the top of the water-stop module.

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