First, the common forms and characteristics of external scaffolding of high-rise buildings
The types of scaffolding include fastener-type steel pipe scaffolding, bowl-type steel pipe scaffolding, and portal steel pipe scaffolding. The structural form of the external scaffolding of high-rise buildings should be selected according to the characteristics of the project and the requirements of the construction organization. First of all, it should meet the needs of construction. At the same time, it should also consider the amount of materials, the difficulty of erection and dismantling, the degree of safety assurance, etc., which need to be determined after comprehensive consideration and technical experience comparison. The external scaffolding used in high-rise building construction, the common structural forms such as cantilever scaffolding, attached lifting scaffolding, suspended scaffolding, etc.
Second, the introduction of cantilever scaffolding
Cantilever scaffolding is a construction scaffolding erected using a supporting structure cantilevered on a building. The vertical load of the frame is transmitted to the main structure through the cantilever supporting structure. The cantilever scaffolding is composed of a steel support frame, a fastener-type steel pipe scaffolding, and a wall connection.
All the loads of the cantilever scaffolding are ultimately transferred to the building structure through the cantilever structure. Therefore, the key to the cantilever scaffolding is the cantilever structure, which must have sufficient strength, rigidity, and stability, and can be reliably connected to the building structure to safely transfer the load of the scaffolding to the building structure. According to the different structural forms of the cantilever structure, it can be divided into two types: inclined-stayed type and bottom-supported type.
Third, the scope of use of the cantilever scaffolding
1. High-rise building construction: When the building is high and the height of the ground-type scaffolding is limited (usually when it exceeds 50 meters, the difficulty and risk of the ground-type scaffolding will increase significantly), the cantilever scaffolding is an ideal alternative. For example, in the construction of some residential buildings or office buildings with more than 30 floors, by setting cantilever beams on the floor structure of the building and cantilevering the scaffolding, the problem of high-altitude working platforms can be effectively solved. It can be erected in sections, and gradually cantilevered upwards as the construction progresses of the main structure of the building, avoiding the safety hazards and material waste caused by the scaffolding being erected too high at one time.
2. Construction on sites with limited space: In some construction sites, the ground space is narrow and cannot meet the requirements for the erection of ground-based scaffolding. For example, in building renovation projects in the central area of the city, there may be obstacles such as other buildings, roads, or underground pipelines around. At this time, the cantilever scaffolding can be cantilevered outward from the internal structure of the building, making full use of the internal space of the building and reducing the occupation of the site. For some street-facing building construction, the use of cantilever scaffolding can avoid excessive interference with street traffic, and only the necessary safety protection passages need to be set up on one side of the street.
3. Special structure construction: For some buildings with complex structures, such as large-span steel structure factories and stadiums, cantilever scaffolding can be flexibly arranged according to the characteristics of the building structure. For example, in the construction of steel structure factories, cantilever supports can be set on the columns or beams of the factory to provide an operating platform for the installation of the roof steel structure. When constructing some special-shaped buildings (such as circular and elliptical buildings), cantilever scaffolding can better fit the shape of the building and provide a stable working surface for construction workers.
Fourth, the advantages of cantilever scaffolding
1. High safety: The cantilever beams of cantilever scaffolding are usually reliably connected to the main structure of the building, fixed by embedded parts, anchor bolts, etc., and can withstand large loads. During the construction process, as long as it is erected and used strictly in accordance with the design requirements, its stability is good and can effectively ensure the safety of construction workers. It can set up multiple protective railings and dense safety nets to prevent construction workers from falling and objects from hitting. Moreover, the cantilever length of the scaffolding can be reasonably designed according to actual needs to avoid reduced stability due to excessive cantilevering.
2. Good economy: Compared with ground-type scaffolding, cantilever scaffolding reduces the use of a large number of poles and foundation materials. In the construction of high-rise buildings, ground-type scaffolding requires the erection of very high poles and the setting of large-area foundations, while cantilever scaffolding only needs to set up cantilever supports on the floor structure, saving material costs. It can be erected and dismantled in sections according to the construction progress, reducing the idle time of the scaffolding and material waste. Moreover, when dismantled, the material recycling rate of the cantilever scaffolding is high, which further reduces the construction cost.
3. Strong flexibility: The cantilever scaffolding can be flexibly arranged according to the shape, height, and construction process requirements of the building. It can be erected along the outline of the building’s outer wall, or it can be adjusted in local areas according to construction needs. For example, at the corners of the building or at the door and window openings, the cantilever scaffolding can be easily disconnected and connected without affecting the construction operation. Its cantilever length and height can be adjusted according to the different construction stages, and can adapt to the requirements of various construction processes. Whether it is the main structure construction or the decoration and renovation construction, the cantilever scaffolding can provide a suitable working platform.
In short, the cantilever scaffolding has been widely used in modern construction due to its unique advantages, providing construction workers with a safe, efficient, and flexible working platform, and promoting the smooth progress of construction.
Post time: Jul-07-2025