Construction methods for internal support structures of spherical buildings

Abstract

This invention discloses a construction method for the internal support structure of a spherical building, comprising: constructing the main body of the spherical space frame and reserving hanging nodes; dividing the internal support structure along its height into a lower support area, a middle transition area, and a top operating area, and constructing it using a zoned reverse construction method; first installing the lower support area, then assembling the annular ring beam and platform plate of the top operating area into an operating platform unit, lifting the whole to the design elevation and fixing it with the hanging nodes to form a high-altitude work platform; subsequently using this platform to complete the installation of the middle transition area, making the various areas connected to form a whole. This method transforms the permanent top structure into a construction platform, completely replacing full-span scaffolding, significantly saving on scaffolding material rental, transportation, and labor costs, avoiding the impact of scaffolding loads on the floor slabs, and freeing up internal working space. It is particularly suitable for renovation or cross-construction projects where the main structure is already enclosed, the space is cramped, and there is no large hoisting channel.

Description

Technical Field

[0001] This invention relates to the field of internal support construction technology for spherical buildings, and more specifically to a construction method for internal support structures of spherical buildings. Background Technology

[0002] Spherical steel grid shell structures are widely used in public buildings such as science and technology museums, dome theaters, and experience centers. These buildings typically require a large internal screen support structure to be suspended inside the main steel grid frame after it has been enclosed. This structure consists of vertical keels, horizontal keels, and top hangers, forming an inverted space system.

[0003] Current construction methods mainly rely on full-span scaffolding or large crane lifting. Full-span scaffolding requires erection from the ground to the dome, resulting in large material consumption, long erection and dismantling periods, and high costs. Furthermore, the weight of the scaffolding negatively impacts the lower floor slabs, and the dense scaffolding occupies internal space, preventing other disciplines from working simultaneously. The large crane method requires lifting equipment to enter the space frame or to provide large lifting openings. When the main structure of the space frame is completely enclosed, leaving only small entrances and exits, this method becomes impractical.

[0004] Therefore, to solve the above problems, a construction method for the internal support structure of spherical buildings is needed, which can safely, efficiently and cost-effectively complete the installation of the internal support structure within the confined space formed by the closed grid structure. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a construction method for the internal support structure of spherical buildings, which can safely, efficiently and cost-effectively complete the installation of the internal support structure within a confined space formed by an enclosed grid structure.

[0006] The present invention provides a construction method for an internal support structure for a spherical building, comprising the following steps:

[0007] S1. Construct the main body of the spherical space frame, and reserve hanging nodes on the inner side of the space frame;

[0008] S2. The internal support structure is constructed using the zoned reverse construction method inside the spherical space frame:

[0009] The internal support structure is divided along the height direction into a lower support area, a middle transition area, and a top operating area;

[0010] S2a. The internal support structure of the lower support area is installed by hoisting and constructing using internal and external lifting equipment;

[0011] S2b. Assemble the ring beam and platform plate contained in the top operating area to form an operating platform unit. Use the internal lifting equipment to lift the operating platform unit to the design elevation and fix it with the reserved hanging nodes to form an aerial work platform, thus completing the installation of the internal support structure of the top operating area.

[0012] S2c. Utilizing the fixed aerial work platform as the construction operation surface, and cooperating with internal and external lifting equipment to hoist the internal support structure in the middle transition area of ​​the construction, so that the lower support area, the middle transition area and the top operation area are connected to form an internal support structure located on the inside of the spherical grid structure.

[0013] Furthermore, in step S2b, the annular ring beam, permanent hanger, and platform plate of the top operating area are assembled on the ground to form an operating platform unit. The operating platform unit is then lifted to the design elevation using an internal lifting device located at the top of the spherical space frame. The permanent hanger is then fixedly connected to the pre-set hanging nodes of the space frame to form an aerial work platform suspended below the space frame.

[0014] Furthermore, in step S2b, tie rods and wire ropes are symmetrically arranged around the annular ring beam, and the wire ropes are fixed to the lower chord node of the space frame to form a temporary suspension stabilization system; in step S2c, the temporary tie rods and wire ropes are removed after all areas are closed.

[0015] Furthermore, in step S2c, the construction workers are positioned on an aerial work platform to perform symmetrical cantilever installation on the central transition area. After the cantilever section is connected to the already installed area, the remaining area is fitted and installed and finally welded together.

[0016] Furthermore, the remaining area to be filled in is also lifted to a preset position by an internal lifting device.

[0017] Furthermore, in step S1, when constructing the main body of the spherical space frame, a mounting point for the lifting equipment is reserved at the top of the space frame; in step S2, the internal lifting equipment is a winch mounted on the reserved mounting point at the top of the space frame.

[0018] Furthermore, in step S2, the external lifting device is a lifting device located on the ground or platform outside the space frame.

[0019] Furthermore, in step S2, after the main body of the spherical space frame is constructed, it is closed and sealed, with only a small entrance / exit reserved; the components of the lower support area and the middle transition area are sent into the space frame through this small entrance / exit.

[0020] The beneficial effects of this invention are as follows: The construction method for internal support structures of spherical buildings disclosed in this invention completely eliminates the erection and dismantling of full-span scaffolding by transforming the permanent top structure into a high-altitude work platform. This significantly reduces the costs of scaffolding material rental, transportation, and labor, avoids the adverse effects of the scaffolding's self-weight load on the lower floor slabs, and simultaneously frees up internal working space. This method is highly adaptable to renovation or cross-construction projects where the main structure is already enclosed, the internal space is cramped, and large hoisting channels are not available. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the construction structure of the lower support area of ​​the present invention. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the construction structure of the lower support area of ​​the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the construction structure of the top operating area of ​​the present invention;

[0026] Figure 5 This is a schematic diagram of the construction structure of the middle transition zone of the present invention. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the construction structure of the middle transition zone of the present invention. Figure 2 . Detailed Implementation

[0028] Figures 1-6 The figure shows a structural schematic diagram of the present invention. The method for constructing an internal support structure for a spherical building in this embodiment is illustrated. The internal support structure is located inside the spherical grid body 001 and is used to install the internal screen of the spherical building. The construction method includes the following steps:

[0029] S1. Construct the main body of the spherical space frame 001. The main body of the spherical space frame 001 is a spatial grid shell structure connected by rods and bolted ball joints. During construction, multiple bolted ball joints are reserved on the lower chord inside the space frame as hanging nodes, and hoisting points for wire ropes of winches are reserved at the bolted ball joints at the top of the space frame. After the main body of the space frame is completed, it will be closed and enclosed, leaving only small entrances and exits for personnel and equipment.

[0030] S2. Inside the spherical space frame main body 001, the internal support structure is constructed using a zoned reverse construction method. Before construction, the entire installation process is simulated using construction simulation software to verify the structural stress state at each construction stage and determine the safety of the construction process. During construction, the overall internal support structure is first divided along the height direction into a lower support area, a middle transition area (including a supplementary support area), and a top operating area. No full-span scaffolding is erected during the entire construction process.

[0031] S2a. The internal support structure 006 of the lower support area is installed using internal lifting equipment 002 and external lifting equipment 003. Internal lifting equipment 002 is a winch mounted on the bolt ball joint at the top of the space frame, and external lifting equipment 003 is a truck crane or tower crane located on the ground or platform outside the space frame. Vertical and horizontal ribs of the lower support area are fed into the space frame through a small inlet / outlet. The winch and external crane are used to hoist the components into position, correct their verticality, and then install and fix them. Simultaneously, connecting rods between the components and the space frame are added. The connection between the lower support area and the space frame is completed segment by segment as the installation progresses. The lower support area is directly grounded, forming a stable lower support system after installation.

[0032] S2b. Assemble the annular ring beam and platform panels of the top operating area to form an operating platform unit. Use the internal lifting equipment 002 to lift the operating platform unit to the design elevation and fix it to the reserved hanging nodes to form the aerial work platform 004, completing the installation of the internal support structure of the top operating area. Specifically: Assemble the annular ring beam, central permanent hanger, surrounding temporary auxiliary tie rods, and platform panels of the top operating area into a whole operating platform unit on the ground. Use the winch system pre-attached to the bolt ball nodes at the top of the space frame to lift the operating platform unit to the design elevation via steel wire ropes. Precisely connect and fix the central permanent hanger to the pre-set hanging nodes on the lower chord of the space frame, and symmetrically arrange rigid tie rods and flexible steel wire ropes around the annular ring beam. Tie the steel wire ropes to the special bolt ball nodes on the lower chord of the space frame to form a temporary suspension stabilization system. After load testing and acceptance, the top area forms a stable aerial work platform 004 suspended below the space frame. The platform not only completes the installation in its own area, but also provides personnel positions, temporary material storage, and welding work surfaces for subsequent construction in the central area below.

[0033] S2c. Utilizing the fixed aerial work platform 004 as the construction operating surface, and in conjunction with internal lifting equipment 002 and external lifting equipment 003, the internal support structure 005 in the middle transition area is hoisted, connecting the lower support area, the middle transition area, and the top operating area to form an internal support structure located inside the spherical space frame main body 001. Specifically, construction personnel stand on the completed top platform and perform symmetrical cantilever installation of the middle supplementary area. After the cantilever section is effectively connected to the middle area, the remaining area is inlaid and finally welded together. During the inlay installation of the remaining area, the external lifting equipment 003 is used to hoist the components to the vicinity of the outside of the space frame, and then the components are sent into the space frame through a small inlet and outlet. The internal lifting equipment 002, with the assistance of the aerial work platform 004, then hoists the components into place and installs them. As the curvature of the middle transition area increases, its eccentric force also increases, and the tension on the space frame increases layer by layer. Therefore, it is necessary to calculate and control the cantilever length and construction load during the installation process in the transition area. After all areas are joined and welded together, the temporary tie rods and wire ropes are removed, and deformation monitoring is carried out on key structural nodes to ensure that the installation accuracy meets the design requirements.

[0034] In this embodiment, the construction of the internal support structure within the entire space frame does not require the erection of full-span scaffolding. By converting the permanent top structure into an aerial work platform 004, the erection and dismantling of full-span scaffolding is completely eliminated, significantly reducing costs for scaffolding material rental, transportation, and labor. This also avoids the adverse effects of the scaffolding's self-weight load on the lower floor slabs and frees up internal working space. This method is highly adaptable to renovation or cross-construction projects where the main structure is enclosed, the internal space is cramped, and large hoisting access is lacking.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A construction method for an internal support structure of a spherical building, characterized in that: Includes the following steps: S1. Construct the main body of the spherical space frame, and reserve hanging nodes on the inner side of the space frame; S2. The internal support structure is constructed using the zoned reverse construction method inside the spherical space frame: The internal support structure is divided along the height direction into a lower support area, a middle transition area, and a top operating area; S2a. The internal support structure of the lower support area is installed by hoisting and constructing using internal and external lifting equipment; S2b. Assemble the ring beam and platform plate contained in the top operating area to form an operating platform unit. Use the internal lifting equipment to lift the operating platform unit to the design elevation and fix it with the reserved hanging nodes to form an aerial work platform, thus completing the installation of the internal support structure of the top operating area. S2c. Utilizing the fixed aerial work platform as the construction operation surface, and cooperating with internal and external lifting equipment to hoist the internal support structure in the middle transition area of ​​the construction, so that the lower support area, the middle transition area and the top operation area are connected to form an internal support structure located on the inside of the spherical grid structure.

2. The construction method for the internal support structure of a spherical building according to claim 1, characterized in that: In step S2b, the ring beam, permanent hanger, and platform plate of the top operating area are assembled on the ground to form an operating platform unit. The operating platform unit is lifted to the design elevation using the internal lifting equipment located at the top of the spherical grid structure. The permanent hanger is then fixedly connected to the pre-set hanging nodes of the grid structure to form an aerial work platform suspended below the grid structure.

3. The construction method for the internal support structure of a spherical building according to claim 2, characterized in that: In step S2b, tie rods and wire ropes are symmetrically arranged around the annular ring beam, and the wire ropes are fixed to the lower chord node of the space frame to form a temporary suspension stabilization system; in step S2c, the temporary tie rods and wire ropes are removed after all areas are closed.

4. The construction method for the internal support structure of a spherical building according to claim 1, characterized in that: In step S2c, the construction workers are located on the high-altitude work platform and carry out symmetrical cantilever installation of the central transition area. After the cantilever section is connected to the already installed area, the remaining area is inlaid and finally welded together.

5. The construction method for the internal support structure of a spherical building according to claim 4, characterized in that: The remaining area to be filled in is also lifted to a preset position by an internal lifting device.

6. The construction method for the internal support structure of a spherical building according to claim 1, characterized in that: In step S1, when constructing the main body of the spherical space frame, a hanging point for the lifting equipment is reserved at the top of the space frame; in step S2, the internal lifting equipment is a winch that is hung on the reserved hanging point at the top of the space frame.

7. The construction method for the internal support structure of a spherical building according to claim 1, characterized in that: In step S2, the external lifting device is a lifting device located on the ground or platform outside the space frame.

8. The construction method for the internal support structure of a spherical building according to claim 1, characterized in that: In step S2, after the main structure of the spherical space frame is completed, it is closed and only a small entrance / exit is reserved; the components of the lower support area and the middle transition area are sent into the space frame through this small entrance / exit.

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