Construction method for scaffold vertical rod to penetrate through outer wall bridging piece based on prefabricated plugging

Abstract

The invention discloses a construction method for a scaffold vertical rod to penetrate through an outer wall bridging piece based on prefabricated plugging. The construction method for the scaffold vertical rod to penetrate through the outer wall bridging piece comprises the steps that S1, the scaffold vertical rod is erected; s2, an outer wall bridging piece formwork is erected; s3, the scaffold vertical rod is sleeved with the PVC variable-diameter sleeve, and the bottom of the PVC variable-diameter sleeve is placed above the formwork; s4, carrying out concrete pouring on the bridging piece; s5, PVC reducing sleeves of the same model are adopted as formworks, and micro-expansive concrete of the same mark as the outer wall bridging piece is used for manufacturing precast blocks; and S6, after the scaffold vertical rod is detached, a prefabricated block is rotationally pressed in to block the outer wall bridging piece hole. According to the method, the problems of structural damage, low leakage plugging efficiency and high safety risk of edge operation in traditional construction are solved through pre-embedding of the reducing sleeve, optimization of a concrete pouring process and a prefabricated plugging technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, and particularly relates to a construction method for passing through an outer wall cantilevered plate by a scaffold vertical rod based on prefabricated plugging. BACKGROUND

[0002] In the construction process of high-rise building construction, the floor type scaffold and the cantilevered scaffold have become the most common and indispensable high-altitude construction erection equipment. In the actual construction and use process, because the distance between the inner row vertical rod and the outer wall working surface is relatively close when the scaffold is constructed, the scaffold needs to pass through the outer wall cantilevered plate when the outer wall cantilevered plate is set on the outer wall.

[0003] The traditional construction method for passing through the outer wall cantilevered plate by the scaffold vertical rod generally adopts the methods of reserving a square hole or embedding a wooden box. These two methods can indeed temporarily solve the problem of passing through the outer wall cantilevered plate by the vertical rod. However, these traditional methods actually bury many hidden dangers for the later construction.

[0004] When the construction process of reserving a square hole is adopted, in order to ensure the integrity and waterproof performance of the outer wall cantilevered plate after the vertical rod of the scaffold is removed, the hole needs to be plugged. This requires the construction personnel to chisel the concrete around the hole again to enhance the bonding force between the new and old concrete. Then, the formwork is re-set, and the hole is poured. The whole process is not only complicated, but also difficult to operate because the outer wall cantilevered plate belongs to the edge operation area, and the construction space is relatively narrow. Each additional construction step means that the risk coefficient faced by the construction personnel is gradually increasing. The construction personnel not only need to pay attention to their own safety to prevent falling from the edge, but also need to accurately complete each operation, which undoubtedly brings great challenges to the construction.

[0005] Similarly, the wooden box embedding method also has similar problems. After the vertical rod is removed, the wooden box may be deformed or displaced during the concrete pouring process, affecting the quality of the later plugging. Even if the construction personnel strictly follow the operation specification, due to the limitations of the traditional construction process, it is difficult to fundamentally solve the quality and safety hidden trouble problem. Improper hole plugging may cause leakage of the outer wall, affecting the use function and durability of the building; in severe cases, it may even endanger the safety of the entire building structure. Therefore, a more scientific, reasonable and safe construction method is needed to solve the problems caused by the passing through of the scaffold vertical rod through the outer wall cantilevered plate. SUMMARY

[0006] The application aims to provide a scaffold vertical rod through outer wall cantilever plate construction method based on prefabricated plugging, which simplifies construction process, improves construction efficiency, prevents leakage and improves construction safety.

[0007] To achieve the above purpose, the application adopts the following technical scheme:

[0008] A scaffold vertical rod through outer wall cantilever plate construction method based on prefabricated plugging, specifically comprising the following steps:

[0009] Step S1, setting up a scaffold vertical rod;

[0010] Step S2, setting up an outer wall cantilever plate formwork, and opening a hole at a position corresponding to the scaffold vertical rod on the cantilever plate formwork, so that the scaffold vertical rod passes through the cantilever plate formwork through the hole;

[0011] Step S3, sliding a variable-diameter sleeve on the scaffold vertical rod passing through the outer wall cantilever plate, so that the bottom of the variable-diameter sleeve is placed on the lower formwork of the outer wall cantilever plate, the outer diameter of the upper section of the variable-diameter sleeve is larger than that of the lower section, the inner diameter of the variable-diameter sleeve matches the outer diameter of the scaffold vertical rod, and the axial height of the variable-diameter sleeve is not less than the thickness of the outer wall cantilever plate;

[0012] Step S4, pouring concrete for the outer wall cantilever plate, and after pouring is completed, removing the outer wall cantilever plate formwork and the variable-diameter sleeve, so that the variable-diameter sleeve forms a variable-diameter through hole on the outer wall cantilever plate;

[0013] Step S5, making a concrete block matching the size of the variable-diameter sleeve as a prefabricated block;

[0014] Step S6, removing the scaffold, and sealing and plugging the variable-diameter through hole on the outer wall cantilever plate by the prefabricated block in step S5.

[0015] In the embodiment, in step S1, the scaffold vertical rod is a steel pipe, a disc buckle or a round buckle, etc.

[0016] In the embodiment, in step S2, the elevation of the scaffold vertical rod is higher than the elevation of the cantilever plate formwork when the cantilever plate formwork is set up.

[0017] In the embodiment, the hole on the cantilever plate formwork is larger than the outer diameter of the scaffold vertical rod and smaller than the minimum outer diameter of the variable-diameter sleeve.

[0018] In the embodiment, in step S3, the installation height of the vertical and horizontal horizontal rods of the scaffold is lower than the outer wall cantilever plate.

[0019] In the embodiment, the cross-sectional dimension of the scaffold vertical rod is less than 50 mm, the small cross-sectional dimension of the lower section of the variable-diameter sleeve is 70 mm, and the large cross-sectional dimension of the upper section of the variable-diameter sleeve is 120 mm.

[0020] In this embodiment, when the step S4 is pouring and vibrating the slab concrete, a vibrating rod with a diameter of 30 mm or less is selected, and the vibrating rod should be inserted into the concrete obliquely and avoid touching the reducing sleeve.

[0021] In this embodiment, in the step S5, the micro-expansion concrete with the same label as the outer wall slab is used to make the prefabricated block.

[0022] In this embodiment, in the step S6, after the scaffold vertical rod is removed, the cement-based interface agent is uniformly brushed on the inner wall of the reducing through hole and the outer surface of the prefabricated block, and then the concrete prefabricated block is rotated and pressed into the hole, and after the prefabricated block is pressed into place, the sealing paste is used for sealing treatment at the intersection between the prefabricated block and the surface of the outer wall slab.

[0023] In this embodiment, the sealing paste is polyurethane sealing paste.

[0024] The beneficial effects of the present application are as follows:

[0025] 1. The method uses the reducing sleeve to form a reducing through hole on the slab formwork by sliding the reducing sleeve on the scaffold vertical rod passing through the outer wall slab, uses the concrete block matching the size of the reducing through hole as the prefabricated block, and finally directly seals and blocks the reducing through hole on the outer wall slab through the prefabricated block after the scaffold is removed. Compared with the traditional reserved square hole or wooden box embedded method, the method uses the reducing sleeve as part of the slab formwork, directly forms the reducing through hole on the slab after demolding, avoids the damage to the structure caused by re-chamfering after the vertical rod is removed, protects the structural integrity of the outer wall slab, uses the micro-expansion concrete with the same label as the outer wall slab to make the prefabricated block, the prefabricated block is inserted into the reducing through hole preformed on the slab from top to bottom, and the reducing through hole is blocked. Through the above method, the sealing part can be better combined with the outer wall slab, and the risk of leakage at the sealing part is effectively reduced.

[0026] 2. After the scaffold vertical rod is removed, the inner wall of the reducing through hole is smooth, the cement-based interface agent is uniformly brushed on the inner wall of the reducing through hole and the outer surface of the prefabricated block, and then the concrete prefabricated block is rotated and pressed into the hole. After the prefabricated block is pressed into place, the sealing paste is used for sealing treatment at the intersection between the prefabricated block and the surface of the outer wall slab. Through the above construction method, the sealing property of the connection between the prefabricated block and the reducing sleeve is ensured, the risk of leakage at the sealing part is further reduced, and the waterproof performance of the outer wall slab is improved.

[0027] 3、The prefabricated block is relatively simple to manufacture and install, does not need to re-provide a formwork to pour concrete like a traditional process, reduces construction procedures, greatly improves construction efficiency of plugging a hole, simplifies complex operation steps in traditional construction, reduces operation time and difficulty of a construction personnel in a edge operation area, thereby reducing a safety risk of edge operation and protecting life safety of the construction personnel.

[0028] To sum up, the application solves the problems of structure damage, low plugging and sealing efficiency and high safety risk of edge operation in traditional construction by pre-embedding a variable-diameter sleeve, optimizing a concrete pouring process and pre-fabricating a plugging technology. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a flow chart of the application.

[0030] Figure 2 is a detailed node diagram of a construction state of the application.

[0031] In the drawings, 1 is a vertical pole of a scaffold, 2 is an outer wall cantilever plate, and 3 is a variable-diameter sleeve. DETAILED DESCRIPTION

[0032] The application will be further described below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, but not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description, rather than all the structures.

[0033] In the application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the embodiments, the terms "upper", "lower", "right", "left", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and do not have special meanings.

[0035] As Figure 1、 2 As shown in the drawings, the application provides a scaffold vertical rod crossing outer wall cantilever plate construction method based on prefabricated plugging, comprising the following steps:

[0036] S1, scaffold vertical rod setting: the scaffold vertical rod can be a steel pipe, a disc buckle or a round buckle and the like;

[0037] S2, outer wall cantilever plate formwork setting: when the outer wall cantilever plate formwork is set, the elevation of the full-length scaffold vertical rod is higher than the elevation of the outer wall cantilever plate formwork, holes are opened at the corresponding positions of the cantilever plate formwork and the scaffold vertical rod, the holes on the cantilever plate formwork are used for the crossing of the scaffold vertical rod, and the scaffold vertical rod is passed through the cantilever plate formwork through the holes;

[0038] S3, when the variable-diameter sleeve is arranged, the installation height of the scaffold longitudinal and transverse horizontal rods is not higher than the outer wall cantilever plate, otherwise the variable-diameter sleeve installation is affected, in the embodiment, the variable-diameter sleeve is a PVC variable-diameter sleeve; the minimum cross-sectional dimension of the PVC variable-diameter sleeve is greater than the scaffold vertical rod and greater than the hole size of the cantilever plate formwork, a through hole is arranged in the middle of the PVC variable-diameter sleeve, and the inner diameter of the through hole in the middle of the PVC variable-diameter sleeve matches the outer diameter of the scaffold vertical rod; since the cross-sectional dimension of the existing scaffold vertical rod is generally less than 50 mm, in the embodiment, the small cross-sectional dimension of the PVC variable-diameter sleeve is selected to be 70 mm, the large cross-sectional dimension is selected to be 120 mm, and the total height of the PVC variable-diameter sleeve is greater than the thickness of the outer wall cantilever plate; when used, the PVC variable-diameter sleeve is sleeved on the scaffold vertical rod passing through the outer wall cantilever plate, the bottom of the PVC variable-diameter sleeve is placed above the formwork, and a simple steel mesh is arranged around the PVC variable-diameter sleeve to connect the cantilever plate steel and assist in positioning, and the strength of the PVC variable-diameter sleeve is simultaneously strengthened.

[0039] S4, outer wall cantilever plate concrete pouring: when the concrete of the outer wall cantilever plate is poured and vibrated, a vibrating rod with a diameter of less than 30 mm is selected, the vibrating rod should be inserted into the concrete obliquely, and the PVC variable-diameter sleeve should be avoided to be touched, after the pouring is completed, the PVC variable-diameter sleeve is removed, and the PVC variable-diameter sleeve forms a variable-diameter through hole on the outer wall cantilever plate as an outer form.

[0040] S5, a concrete block with a size matching the outer size of the PVC variable-diameter sleeve is made as a prefabricated block, a mold matching the outer size of the PVC variable-diameter sleeve in step S3 is used, and a micro-expansion concrete with the same mark as the outer wall cantilever plate is used to pour and make the prefabricated block;

[0041] S6, the scaffold is removed, after the scaffold vertical rod is removed, a cement-based interface agent is uniformly brushed on the inner wall of the variable-diameter through hole and the outer surface of the prefabricated block, then the concrete prefabricated block is rotated and pressed into the hole, and after the prefabricated block is pressed into place, a polyurethane sealing paste is used for sealing treatment at the joint between the prefabricated block and the surface of the outer wall cantilever plate.

[0042] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. It is not necessary or possible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A construction method for scaffolding uprights passing through exterior wall cantilever panels based on prefabricated blocking, characterized in that: The specific steps include: Step S1, scaffolding pole support; Step S2: Setting up the exterior wall cantilever template, opening holes at corresponding positions of the cantilever template and the scaffolding uprights, and passing the scaffolding uprights through the holes in the cantilever template; Step S3: Slide a reducing sleeve onto the scaffolding upright that passes through the exterior wall cantilever plate, so that the bottom of the reducing sleeve is placed on the lower side template of the exterior wall cantilever plate, the outer diameter of the upper section of the reducing sleeve is larger than the outer diameter of the lower section, the inner diameter of the reducing sleeve matches the outer surface of the scaffolding upright, and the axial height of the reducing sleeve is not less than the thickness of the exterior wall cantilever plate; Step S4: pouring concrete for the exterior wall cantilever slab. After the pouring is completed, the exterior wall cantilever slab formwork and the reducing sleeve are removed. The reducing sleeve forms a reducing through hole on the exterior wall cantilever slab. Step S5: making a concrete block that matches the outer size of the reducing sleeve as a prefabricated block; Step S6: dismantle the scaffolding and seal the variable diameter through-holes on the exterior wall cantilever plate with the prefabricated blocks in step S5.

2. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: In step S1, the scaffolding uprights are steel pipe, disc buckle or wheel buckle scaffolding.

3. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: When the exterior wall cantilever plate formwork is supported in step S2, the elevation of the scaffolding uprights is higher than the elevation of the cantilever plate formwork.

4. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 3 is characterized in that: The holes on the cantilever template are larger than the outer diameter of the scaffolding uprights and smaller than the minimum outer diameter of the reducer sleeve.

5. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: In step S3, the installation height of the longitudinal and transverse horizontal bars of the scaffolding is lower than the external wall cantilever plate.

6. The construction method of scaffolding uprights passing through exterior wall cantilever panels based on prefabricated blocking according to claim 5 is characterized in that: The cross-sectional size of the scaffolding uprights is less than 50mm, the small cross-sectional size of the lower section of the reducer sleeve is 70mm, and the large cross-sectional size of the upper section is 120mm.

7. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: When pouring and vibrating the cantilever slab concrete in step S4, a vibrating rod with a diameter of less than 30 mm should be used. The vibrating rod should be inserted into the concrete at an angle and avoid touching the reducing sleeve.

8. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: In step S5, the precast blocks are cast using slightly expansive concrete of the same grade as the exterior wall cantilever panels.

9. The construction method of scaffolding poles passing through exterior wall cantilever panels based on prefabricated blocking according to claim 1 is characterized in that: In step S6, after the scaffolding uprights are removed, a cement-based interface agent is evenly applied to the inner wall of the variable-diameter through hole and the outer surface of the precast block, and then the concrete precast block is rotated and pressed into the hole. After the precast block is pressed into place, a sealing paste is used to seal the junction between the precast block and the surface of the exterior wall cantilever.

10. The construction method for scaffolding uprights passing through exterior wall cantilever panels based on prefabricated blocking according to claim 9 is characterized in that: The sealing paste is polyurethane sealing paste.

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