A spiral net rack landscape tower assembling construction method

Abstract

The application discloses a spiral net rack landscape tower assembling construction method, which comprises the following steps: pouring a landscape tower foundation; backfilling a concrete foundation; prefabricating a bundle cylinder inclined column; assembling the bundle cylinder inclined column in pieces; installing a top platform; installing a spiral stair; and painting and spraying. The axial force support interaction between the net rack type bundle cylinder inclined column structural members makes the structure stable, enhances the overall rigidity and lateral force resistance, fully utilizes the material strength, saves the steel material, and reduces the self weight.

Description

Technical Field

[0001] This invention relates to a method for assembling and constructing a spiral grid landscape tower, belonging to the field of building construction technology. Background Technology

[0002] As a highlight of garden projects, observation towers typically employ irregularly shaped steel structures. The advantages are their aesthetically pleasing and elegant appearance, expansive views, and enhanced visitor experience. However, there are two disadvantages: First, an aesthetically pleasing design can lead to complex structures, making on-site welding and assembly difficult and potentially causing dimensional discrepancies. Second, while a simpler design facilitates construction, it may compromise the structural integrity and load-bearing capacity of tall structures with high foot traffic, and a simplified design can also negatively impact the overall visual appeal of the irregular structure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for assembling and constructing a spiral grid landscape tower. The axial force support interaction between the grid-type bundled tube inclined column structural components makes the structure stable, enhances the overall rigidity and resistance to lateral forces, and makes full use of the material strength, which saves steel and reduces the self-weight.

[0004] To solve the above-mentioned technical problems, the present invention provides a method for assembling and constructing a spiral grid landscape tower, comprising:

[0005] The process includes: pouring the foundation for the observation tower; backfilling the concrete foundation; prefabricating the inclined columns of the tube bundle; assembling the inclined columns of the tube bundle in sections; installing the top platform; installing the spiral staircase; and painting.

[0006] Furthermore, the method for pouring the foundation of the observation tower is as follows: after the raft slab reinforcement is tied, the foundation is poured; Φ325*2000mm studded steel columns are pre-embedded on the foundation as bases, the bases are surrounded by 18mm thick wooden formwork, and reinforced with 50*100mm standard timber and Φ48*3.5mm steel pipes, and 16 bases are poured at one time.

[0007] Furthermore, the method for backfilling the concrete foundation is as follows: undisturbed soil is used for layered backfilling, with each layer being ≤300mm thick. The backfill is carried out evenly on opposite sides or around the foundation, spreading layer by layer from low to high, and then compacted in layers, with the backfill soil density ≥0.95.

[0008] Furthermore, the method for prefabricating the inclined column of the bundle tube is as follows: the ground at the location of the selected inclined column fabrication platform is leveled, a 20CM thick layer of crushed stone is laid and compacted, Φ108*5 steel pipe is welded as the base, and angle steel ∠50*5 is used for support. After the fabrication platform is installed, the base ground is filled with C30 concrete, and welding is carried out using CO2 gas shielded semi-automatic welding and flux-cored welding wire.

[0009] Furthermore, the method for assembling the inclined column of the bundle tube in sections is as follows: a dual-frequency GPS and a high-precision total station are used to measure and control the network, and a plumb line and a total station are used to set out the construction benchmark points, supplemented by GPS verification; the structure is installed by lifting with a single machine using the rotation method, and the guy ropes are tied before lifting; the components are installed in sections in a clockwise direction, and adjacent inclined column sections are positioned and welded in sequence until the entire structure is installed, and the joints at the sectioning points are repaired by welding.

[0010] Furthermore, the method for installing the top platform is as follows: the circular ring beam of the top platform is prefabricated using 400*400*16*16mm rectangular square steel, and the longitudinal and transverse beams are HM294*200 steel. The top platform is installed using a multi-point hoisting method with one machine; a 50T truck crane is used, with two steel wire ropes for 4-point hoisting, and the sling angle is not less than 45°.

[0011] Furthermore, the installation method of the spiral staircase is as follows: the staircase components are installed in layers, using a 25T truck crane, and a total station is used for real-time monitoring during the installation process; for each layer, the inner square steel load-bearing short beams are installed first, followed by the 400*200*16*16mm square steel inner stair beams, the 250*200*8*8mm square steel step beams, and the 400*200*16*16mm square steel outer stair beams, and finally the 6mm checkered steel plate steps and railings are laid and welded.

[0012] Furthermore, the paint spraying method is as follows: when the structural components are prefabricated in the factory, the surface of the structural components is pre-sandblasted to Sa2.5 grade and then sprayed with epoxy zinc-rich primer; after on-site installation and touch-up painting, 50-80μm of epoxy micaceous iron oxide intermediate paint is sprayed, and finally 30-40μm of corrosion-resistant fluorocarbon topcoat is sprayed. Then, the spiral staircase is colored and the coating is stabilized and cured after drying at room temperature for more than seven days.

[0013] The beneficial effects achieved by this invention are as follows:

[0014] 1. Bundle-shaped inclined column structure

[0015] The bundled tube inclined column structure of the present invention is spindle-shaped, with each steel tube inclined column combined at an incline, which reduces the difficulty of installation. At the same time, the interaction between the bundled tube components makes the overall structure stable and has high spatial stiffness.

[0016] 2. Space frame splicing

[0017] This invention utilizes the intersecting welding of inclined columns in a bundled tube to form a grid structure, which not only saves steel and reduces weight, but also enhances the structural rigidity and resistance to lateral forces through grid welding.

[0018] 3. Spiral steps surround

[0019] This invention uses a wide-body (1800mm wide) variable-diameter spiral staircase surrounding the observation tower. The variable-diameter staircase perfectly matches the bundled tube structure, and the streamlined shape is beautiful, elegant, and space-saving.

[0020] 4. The grid-type bundled tube inclined column structure of the present invention can be combined to form a variety of building shapes and can adapt to the needs of different heights and shapes. It is suitable for irregular steel structure buildings such as observation towers, waterfront platforms, and membrane structures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments. These embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0023] I. This invention provides a method for assembling and constructing a spiral grid landscape tower, comprising the following steps:

[0024] 1. Foundation pouring for the observation tower

[0025] The observation tower uses precast pipe pile foundations. After the earthwork excavation is completed, the integrity of the pipe piles is tested, and mechanical pile cutting is used after passing the test. After the raft foundation reinforcement is tied, the foundation is poured. Φ325*2000mm shear stud steel columns are pre-embedded in the foundation as bases. The bases are surrounded by 18mm thick wooden formwork and reinforced with 50*100mm standard timber and Φ48*3.5mm steel pipes. All 16 bases are poured in one go.

[0026] 2. Concrete foundation backfilling

[0027] Due to the deep excavation, and considering the stability of the raft foundation, the original soil was backfilled in layers, with each layer ≤300mm thick. It should be carried out evenly on both sides or around the foundation, spreading layer by layer from low to high, and then compacted in layers. The backfill soil density is required to be ≥0.95, which is the standard for light compaction.

[0028] 3. Prefabrication of inclined columns in bundled tubes

[0029] The transportation of semi-finished steel components to the site should be arranged according to the installation and construction schedule, and the number of each component should be accurate. After the components arrive on site, the quantity, specifications and numbers of the components should be checked and verified to ensure they match.

[0030] The selected location of the inclined column construction platform was leveled, covered with 20cm thick gravel and compacted. A Φ108*5 steel pipe was welded as the base and supported by ∠50*5 angle steel. After the platform was installed, the base was filled with C30 concrete to ensure overall stability.

[0031] Considering the characteristics of this project, the welding process was determined to be CO2 gas shielded semi-automatic welding combined with flux-cored wire. This welding process features slag-gas combined protection, which can ensure welding quality. Welding was carried out by a combination of overall symmetrical welding and partial symmetrical welding, performed by two people per team.

[0032] 4. Bundle tube inclined column segmented assembly

[0033] Based on the characteristics of this project, a dual-frequency GPS and high-precision total station surveying control network was adopted. Construction benchmarks were established using a plumb line and total station, supplemented by GPS verification. To ensure the accuracy of the plumb line transmission, in-situ relocation was required at certain height intervals. Multiple methods were used to increase redundant observations to ensure final control accuracy.

[0034] The structural installation employs a single-machine rotation method for hoisting. Before hoisting, guy ropes are secured to prevent dragging of the column ends on the ground. Sufficient height must be maintained during rotation, and the steel column must remain stable. Components are hoisted in sections in a clockwise direction, with adjacent bundled tube inclined column segments being positioned and welded sequentially until the entire structure is installed. Joints at the section junctions are then repaired by welding.

[0035] 5. Top platform installation

[0036] The circular ring beam of the top platform is prefabricated using 400*400*16*16mm rectangular steel, while the longitudinal and transverse beams are made of HM294*200 steel. To expedite construction and improve efficiency, a multi-point hoisting method using a single crane is employed for the top platform. A 50T truck crane is used, with two steel wire ropes for four-point lifting, and the sling angle must not be less than 45°.

[0037] 6. Spiral staircase installation

[0038] The staircase components were installed in layers, using a single 25T truck crane. A total station was used for real-time monitoring during the installation process. On each layer, the inner square steel load-bearing short beams were installed first, followed by the 400*200*16*16mm square steel inner stair beams, the 250*200*8*8mm square steel step beams, and the 400*200*16*16mm square steel outer stair beams. Finally, 6mm checkered steel plate steps and railings were laid and welded.

[0039] 7. Paint spraying

[0040] During factory prefabrication of structural components, the surface of the components is pre-blasted to Sa2.5 grade and then coated with epoxy zinc-rich primer (50-80μm). After on-site installation and touch-up painting, epoxy micaceous iron oxide intermediate paint (50-80μm) is applied, followed by a highly corrosion-resistant fluorocarbon topcoat (30-40μm). Spiral staircases also require color spraying, and the coating is allowed to dry and cure at room temperature for more than seven days. The installed space-frame type inclined column steel structure observation tower is an example. Figure 1 As shown.

[0041] II. Materials and equipment used in this invention:

[0042] 1. Main materials

[0043] The main construction materials are shown in Table 1.

[0044] Table 1 Main Materials List

[0045]

[0046] 2. Mechanical equipment

[0047] The configuration of the main construction machinery and equipment is shown in Table 2.

[0048] Table 2 Main Construction Machinery and Equipment

[0049]

[0050] III. Environmental Protection Measures

[0051] 1. Water quality protection

[0052] (1) Construction workers are prohibited from throwing garbage into rivers and discharging wastewater, waste oil and washing materials.

[0053] (2) Paint should be stored in a safe container and placed in a designated location to prevent accidental leakage into rivers.

[0054] (3) Promptly handle and separate construction waste materials and pile them in a safe temporary storage place to prevent rainwater from polluting the water quality.

[0055] 2. Dust control

[0056] (1) The construction site and transportation roads are frequently watered to minimize the harm of dust to production personnel and other personnel and to the contamination of crops.

[0057] (2) Materials that are easily blown away during transportation should be covered tightly with tarpaulins and the amount of material should be appropriate. Overloading is not allowed.

[0058] (3) Construction waste shall be stored in sealed containers and transported by special vehicles.

[0059] (4) The site should be swept and watered frequently, and construction workers should carry out civilized construction and clean up the site after the work is completed.

[0060] 3. Noise control

[0061] (1) When determining the construction method, try to choose the process that generates less noise, and select construction equipment with excellent performance, low noise and good maintenance.

[0062] (2) Arrange construction work time reasonably, minimize the frequency of vehicle entry and exit at night, and do not arrange noisy machinery for construction at night.

[0063] (3) Handle materials gently to reduce knocking noise during construction.

[0064] IV. Benefit Analysis

[0065] 1. Economic benefits

[0066] The axial force support interaction between the inclined column components of the space frame-type bundled tube structure of this invention stabilizes the structure, enhances overall rigidity and resistance to lateral forces, and fully utilizes the strength of the materials, saving steel and reducing weight. Calculations show that this results in savings of 123,700 yuan, demonstrating a certain economic advantage.

[0067] 2. Social benefits

[0068] The grid-type bundled tube inclined column structure of this invention can be combined to form a variety of building shapes and can adapt to the needs of different heights and shapes. At the same time, this invention adopts a wide-body variable diameter spiral step to surround the observation tower. The variable diameter step perfectly matches the bundled tube structure, and the streamlined shape is beautiful, elegant and space-saving.

[0069] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A spiral lattice landscape tower assembly construction method, characterized in that, include: Foundation pouring for the observation tower; backfilling of the concrete foundation; prefabrication of the inclined columns; segmented assembly of the inclined columns; installation of the top platform; Spiral staircase installation; painting; The inclined columns of the bundle tube are welded together in a grid pattern, and the inclined columns of the bundle tube are spindle-shaped, with each steel pipe inclined column being assembled at an incline. The method for prefabricating the inclined column of the bundle tube is as follows: the ground at the location of the selected inclined column fabrication platform is leveled, a 20CM thick layer of crushed stone is laid and compacted, Φ108*5 steel pipe is welded as the base, and angle steel ∠50*5 is used for support. After the fabrication platform is installed, the base ground is filled with C30 concrete, and welding is carried out using CO2 gas shielded semi-automatic welding and flux-cored welding wire. The method for assembling the inclined column of the bundle tube in sections is as follows: a dual-frequency GPS and a high-precision total station are used to measure and control the network. A plumb line and a total station are used to set up the construction benchmark points, supplemented by GPS verification. The structure is installed by lifting with a single machine using a slewing method. Before lifting, guy ropes are tied. The components are installed in sections in a clockwise direction. Adjacent inclined column sections are positioned and welded in sequence until the entire structure is installed. The joints at the sectioning points are then repaired by welding.

2. The spiral grid landscape tower assembly construction method according to claim 1, characterized in that, The method for pouring the foundation of the observation tower is as follows: after the raft slab reinforcement is tied, the foundation is poured; Φ325*2000mm studded steel columns are pre-embedded on the foundation as bases, and 18mm thick wooden formwork is used around the bases, and 50*100mm standard timber and Φ48*3.5mm steel pipes are used for reinforcement. The 16 bases are poured at one time.

3. The spiral grid landscape tower assembly construction method according to claim 1, characterized in that, The method for backfilling the concrete foundation is as follows: undisturbed soil is used for layered backfilling, with each layer being ≤300mm thick. The backfill is carried out evenly on both sides or around the foundation, spreading it layer by layer from low to high, and then compacting it layer by layer. The compaction degree of the backfill soil is ≥0.

95.

4. The spiral grid landscape tower assembly construction method according to claim 1, characterized in that, The installation method of the top platform is as follows: the circular ring beam of the top platform is prefabricated with 400*400*16*16mm rectangular square steel, and the longitudinal and transverse beams are HM294*200 steel. The top platform is installed using a multi-point hoisting method with one machine; a 50T truck crane is used, with two steel wire ropes for 4-point hoisting, and the hoisting angle is not less than 45°.

5. The spiral grid landscape tower assembly construction method according to claim 1, characterized in that, The installation method of the spiral staircase is as follows: the staircase components are installed in layers, using a 25T truck crane, and a total station is used for real-time monitoring during the installation process; for each layer, the inner square steel load-bearing short beams are installed first, followed by the 400*200*16*16mm square steel inner stair beams, the 250*200*8*8mm square steel step beams, and the 400*200*16*16mm square steel outer stair beams, and finally the 6mm checkered steel plate steps and railings are laid and welded.

6. The spiral grid landscape tower assembly construction method according to claim 1, characterized in that, The paint spraying method is as follows: When the structural components are prefabricated in the factory, the surface of the structural components is sandblasted to Sa2.5 level and then sprayed with epoxy zinc-rich primer; after on-site installation and touch-up painting, 50-80μm of epoxy micaceous iron oxide intermediate paint is sprayed, and finally 30-40μm of corrosion-resistant fluorocarbon topcoat is sprayed. Then, the spiral staircase is painted with color, and the coating is stabilized and cured after drying at room temperature for more than seven days.

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