Split-level overhanging flower basket outer frame for split-level aerial courtyard and construction method of split-level overhanging flower basket outer frame

Abstract

The invention provides a split-level overhanging flower basket outer frame for a split-level aerial courtyard and a construction method thereof, the split-level overhanging flower basket outer frame comprises a profile steel main beam arranged on an Nth layer structure system on the periphery of the aerial courtyard, and N is an integer greater than 1. The profile steel main beam is anchored to a boundary beam of an aerial courtyard in an opposite penetrating mode, the lower portion of the profile steel main beam is fixedly connected with one end of the profile steel lower support, the other end of the profile steel lower support is fixedly connected with a boundary beam of the (N-1) th layer of structural system, and the upper portion of the profile steel main beam is fixedly connected with one end of the steel pull rod through an upper pull lug plate. The other end of the steel pull rod is fixedly connected with the (N + 2) th layer structure system, the included angle between the steel pull rod and the horizontal plane is larger than or equal to 45 degrees, and the steel pull rod is connected with a turn buckle; according to the outer frame system and the construction method, the outer frame system can adapt to the appearance of a split-level cantilever structure, and good economical efficiency, safety and construction convenience are achieved, so that wide application and standardized construction of fourth-generation ecological residences are promoted.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a staggered cantilevered flower basket scaffold for staggered sky courtyards and its construction method. Background Technology

[0002] The fourth-generation eco-friendly housing adopts the design concept of "nature integrated into architecture," aiming to create a living environment where every household has a garden and every floor has a view by setting up cantilevered sky courtyards, increasing green space, improving the local microclimate, and enhancing the interaction between people and nature. This type of housing usually uses reinforced concrete structures, and the sky courtyards are arranged in a staggered manner, that is, the courtyards on adjacent floors are staggered to ensure indoor lighting and open views.

[0003] However, the irregular facades of such structures, especially the overhanging and staggered arrangement of the sky courtyard areas (such as the south-facing balconies), make it difficult for traditional scaffolding systems to adapt to their complex shapes, resulting in high construction difficulty, low safety, and poor economic efficiency. Currently, common solutions include cantilevered steel scaffolding and basket-type cantilevered scaffolding. The former requires anchoring the steel sections to the base of the cantilevered components, leading to excessively long steel sections (often exceeding 8 meters), making construction inconvenient and costly. The latter, while lighter in structure, requires the upper tie rods to meet the specification requirement of an angle of not less than 45° with the horizontal plane, often necessitating cross-layer connections, which presents problems such as insufficient steel tie rod length and installation difficulties. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to address the shortcomings of existing technologies by providing a staggered cantilevered flower basket scaffolding for staggered sky courtyards and its construction method. This scaffolding system and construction method can adapt to the shape of staggered cantilevered structures and has good economy, safety and construction convenience, so as to promote the widespread application and standardized construction of fourth-generation ecological housing.

[0005] Technical Solution: The present invention provides a staggered cantilevered flower basket scaffolding for a staggered sky garden, comprising a steel main beam installed on the Nth layer of the structural system surrounding the sky garden, where N is an integer greater than 1. The steel main beam is anchored through to the edge beam of the sky garden. The lower end of the steel main beam is fixedly connected to one end of a steel lower support, and the other end of the steel lower support is fixedly connected to the edge beam of the (N-1)th layer of the structural system. The upper end of the steel main beam is fixedly connected to one end of a steel tie rod via an upper pull plate, and the other end of the steel tie rod is fixedly connected to the (N+2)th layer of the structural system. The angle between the steel tie rod and the horizontal plane is ≥45°, and turnbuckles are connected to the steel tie rod.

[0006] The steel underbracing is used to provide temporary support during the initial installation phase, the extension steel plate is used to extend the steel tie rod, and the turnbuckle is used to adjust the tightness of the steel tie rod. The main steel beams are set in pairs and staggered layers around the sky courtyards of adjacent floors, so that the facade of the external frame forms a whole.

[0007] The core load-bearing system of the entire scaffolding system includes the aforementioned components. The main steel beams are the primary cantilevered load-bearing members, transferring the scaffolding load to the main structure. The steel underbracing initially forms a triangular stable support, temporarily bearing the load. Ultimately, the load is efficiently transferred to the main structure on the N+2th floor through the steel tie rods in tension. Turnbuckles are used to precisely adjust the tension of the steel tie rods, ensuring the entire system is taut and under load. The steel underbracing provides initial stability. Extended steel plates solve the problem of insufficient steel tie rod length caused by staggered layer connections. The staggered layer arrangement refers to the alternating arrangement of main steel beams on odd and even-numbered floors, but the scaffolding on them can be connected into a single unit through adjustment.

[0008] Furthermore, the main steel beam is anchored to the sky garden via steel anchor plates pre-embedded in the side beams. The base of the main steel beam is fixed to the concrete side beam using a combination of pre-embedded anchor plates and through-bolts.

[0009] Furthermore, an extension steel plate is welded to the downward-facing end of the steel tie rod, and the upward-facing end of the steel tie rod is fixedly connected to the N+2 layer structural system via a steel tie rod anchor plate. Both welding and bolting are reliable mechanical connection methods that ensure the stress performance of the tie rod. This design allows the use of standard-length steel tie rods, which can be flexibly adapted to the required length by extending the steel plate, reducing the complexity of procurement and construction.

[0010] Furthermore, the main steel beams are made of 16# I-beams, the steel underbracing is made of 12# channel steel, and the steel tie rods are made of A20 round steel. The selected steel profiles and round steel specifications are common and economical models that meet the stress requirements after structural calculations, avoiding material waste and ensuring strength.

[0011] A construction method for a staggered cantilevered flower basket scaffold as described above includes the following steps: S1: When constructing the cantilever beams of the lower-level sky courtyard, PVC pipes for installing steel anchor plates are pre-embedded in the edge beams. S2: After the lower-level sky courtyard structure is poured and reaches the specified strength, remove the side beam formwork, install the through steel anchor plates and fix the main steel beam; S3: Install steel underbracing and set adjustable top supports on the erected lower external scaffolding uprights to support the steel main beam; S4: Erect an upper double-row external scaffold on the main steel beam and continue construction of the upper two main structures; S5: When constructing beams for anchoring steel tie rods in the upper main structure, pre-embed PVC pipes for installing high-strength bolts; S6: After the upper main structure is poured and reaches the specified strength, remove the formwork of the corresponding beams and install through-bolts and steel tie rod anchor plates; S7: Use extension steel plate 7 to extend the steel tie rod, connect its upper end to the steel tie rod anchor plate, connect its lower end to the upper tie lug plate on the main steel beam, and tighten it with turnbuckles; S8: Remove the steel underbracing used for temporary support and the adjustable top support on the lower external frame uprights to form a complete cantilevered load-bearing system.

[0012] Furthermore, the specified strength in steps S2 and S6 is more than 75% of the design strength of the concrete.

[0013] The construction method strictly followed the construction logic of "temporary support first, then permanent stabilization". The key is to pre-embed the sleeve before pouring concrete to create conditions for subsequent installation. After all the key structures have reached sufficient strength, the subsequent installation is carried out to ensure safety. Finally, the load is transferred from the temporary support to the permanent tie system by tensioning the steel tie rod.

[0014] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows: (1) The present invention forms a force transmission route of “cantilever, temporary support and final connection” through the main steel beam, the lower steel support and the steel tie rod, which has high structural stability; by setting the tie point on the N+2 layer instead of the upper layer, the specification requirement of the steel tie rod and the horizontal plane being ≥45° is perfectly met, ensuring the tensile efficiency of the tie rod and avoiding the problem of reduced bearing capacity and non-compliance with specifications caused by the tie rod angle being too small in the traditional scheme; (2) The temporary support system in this invention ensures construction safety before the final tie system is formed. Turnbuckles and extension steel plates provide tolerance adjustment capability to adapt to actual size changes on site. The scaffolding supported by the staggered steel main beams can eventually form a continuous and regular operating platform, which is convenient for construction and has stronger overall stability. (3) The construction method of the present invention not only ensures structural safety and avoids damage to the structure when the concrete strength is insufficient, but also speeds up the construction progress to the maximum extent and realizes rapid turnover. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the staggered sky garden mentioned in the background art of this invention; Figure 2 This is a schematic diagram of the staggered cantilevered flower basket outer frame in this invention; Figure 3 This is a schematic diagram of the installation of the 16# I-beam main beam in Example 2; Figure 4 In Example 2, a 12# channel steel section steel underbracing is installed, and a top support is set on the outer row of vertical poles of the lower outer frame; Figure 5 In Example 2, a double-row external scaffold was erected on the main steel beam, and the construction of the upper two-story structure was completed. Figure 6 In Example 2, through-bolts are installed at the root beam of the upper two-story sky courtyard, A20 steel tie rods are installed, and the steel tie rods are extended; Figure 7 In Example 2, the top support of the lower outer frame has been removed and installed. Figure 8 This is a schematic diagram of the installation of even-numbered cantilevered layers in Example 2; Figure 9 This is a schematic diagram of the installation of odd-numbered cantilevered layers in Example 2; Figure 10 This is a schematic diagram of the overall rigging of the staggered cantilevered external scaffold in Example 2. Detailed Implementation

[0016] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0017] Example 1 like Figure 2 The diagram illustrates a staggered cantilevered flower basket scaffold for a split-level sky garden. It includes a main steel beam 1 installed on the Nth layer of the structural system surrounding the sky garden. The main steel beam 1 is anchored through to the edge beams of the sky garden. One end of the main steel beam 1 is fixedly connected to a steel lower support 2, and the other end of the lower support 2 is fixedly connected to the edge beam of the (N-1)th layer of the structural system. The upper part of the main steel beam 1 is fixedly connected to one end of a steel tie rod 3 via an upper pull plate 4, and the other end of the steel tie rod 3 is fixedly connected to the N+2th layer of the structural system. The angle between the steel tie rod 3 and the horizontal plane is ≥45°. Turnbuckles 8 are connected to the steel tie rod 3. The main steel beam 1 is anchored through to the sky garden via steel anchor plates 5 pre-embedded in the edge beams. An extension steel plate 7 is welded to the downward-facing end of the steel tie rod 3, and the upward-facing end of the steel tie rod 3 is fixedly connected to the N+2th layer of the structural system via a steel tie rod anchor plate 6.

[0018] In this embodiment, the main steel beam 1 is a 16# I-beam, the steel underbracing 2 is a 12# channel steel, and the steel tie rod 3 is an A20 round steel.

[0019] Example 2 like Figures 3-7 As shown, a construction method for a staggered cantilevered flower basket scaffold includes the following steps: S1: When constructing the cantilever beam slab of the lower-level sky courtyard, PVC pipes for installing steel anchor plates 5 are pre-embedded in its side beams. S2: After the lower-level sky courtyard structure is poured and reaches the specified strength, remove the side beam formwork, install the through-type steel anchor plate 5 and fix the main steel beam 1; the specified strength is more than 75% of the concrete design strength; S3: Install the steel underbracing 2 and set adjustable top supports on the erected lower outer frame uprights to support the steel main beam 1; S4: Erect the upper double-row external scaffolding on the main steel beam 1, and continue construction of the upper two main structures; S5: When constructing beams for anchoring steel tie rods in the upper main structure, pre-embed PVC pipes for installing high-strength bolts; S6: After the upper main structure is poured and reaches the specified strength, remove the formwork of the corresponding beams and install through-through high-strength bolts and steel tie rod anchor plates 6; the specified strength is more than 75% of the concrete design strength; S7: Use the extension steel plate 7 to extend the steel tie rod 3, connect its upper end to the steel tie rod anchor plate 6, connect its lower end to the upper pull lug plate 4 on the steel main beam 1, and tighten it with turnbuckle 8; S8: Remove the steel underbracing 2 used for temporary support and the adjustable top support on the lower outer frame uprights to form a complete cantilevered load-bearing system.

[0020] like Figures 8-10 As shown, the setup methods for odd and even layers are fundamentally the same: "cantilevered at this level, anchored to the two levels above." The only difference is that the courtyard's staggered layout results in alternating cantilever positions on odd and even layers, naturally forming an efficient, regular, and stable overall scaffolding system. During construction, simply repeat the steps described for each layer.

[0021] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A staggered cantilevered flower basket frame for a staggered sky courtyard, characterized in that: The structure includes a steel main beam (1) installed on the Nth layer of the outer perimeter of the sky garden. The steel main beam (1) is anchored through the side beam of the sky garden. The lower part of the steel main beam (1) is fixedly connected to one end of the steel lower support (2). The other end of the steel lower support (2) is fixedly connected to the side beam of the N-1th layer of the structure. The upper part of the steel main beam (1) is fixedly connected to one end of the steel tie rod (3) through the upper pull plate (4). The other end of the steel tie rod (3) is fixedly connected to the N+2th layer of the structure. The angle between the steel tie rod (3) and the horizontal plane is ≥45°. Turnbuckles (8) are connected to the steel tie rod (3).

2. The staggered cantilevered flower basket frame for a staggered sky courtyard according to claim 1, characterized in that: The main steel beam (1) is anchored to the sky courtyard through the steel anchor plate (5) pre-embedded on the side beam.

3. The staggered cantilevered flower basket frame for a staggered sky courtyard according to claim 1, characterized in that: The lower end of the steel tie rod (3) is welded with an extension steel plate (7), and the upper end of the steel tie rod (3) is fixedly connected to the N+2 layer structure system through a steel tie rod anchor plate (6).

4. The main steel beam (1) is a 16# I-beam, the steel underbracing (2) is a 12# channel steel, and the steel tie rod (3) is an A20 round steel.

5. A construction method for a staggered cantilevered flower basket scaffold as described in any one of claims 1 to 4, characterized in that... Includes the following steps: S1: When constructing the cantilever beam slab of the lower-level sky courtyard, PVC pipes for installing steel anchor plates (5) are pre-embedded in its side beams. S2: After the lower-level sky courtyard structure is poured and reaches the specified strength, remove the side beam formwork, install the through steel anchor plate (5) and fix the main steel beam (1). S3: Install the steel underbracing (2) and set an adjustable top support on the erected lower outer frame uprights to support the steel main beam (1). S4: Erect an upper double-row external scaffold on the main steel beam (1) and continue construction of the upper two main structures; S5: When constructing beams for anchoring steel tie rods in the upper main structure, pre-embed PVC pipes for installing high-strength bolts; S6: After the upper main structure is poured and reaches the specified strength, remove the formwork of the corresponding beam and install the through high-strength bolts and the steel tie rod anchor plate (6). S7: Use the extension steel plate (7) to extend the steel tie rod (3), connect its upper end to the steel tie rod anchor plate (6), connect its lower end to the upper pull lug plate (4) on the steel main beam (1), and tighten it with the turnbuckle (8); S8: Remove the steel underbracing (2) used for temporary support and the adjustable top support on the lower outer frame uprights to form a complete cantilevered force system.

6. The construction method according to claim 5, characterized in that: The specified strength in steps S2 and S6 is more than 75% of the design strength of the concrete.

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