Construction methods of structures

Abstract

To construct a dome-shaped large space structure even when a large-scale facility is present in an interior space.SOLUTION: A method for constructing a dome-shaped large space structure comprises: a leg portion construction step of constructing legs on an installation surface; a post construction step of constructing a post so as to stand upward from the leg portion; a support structure construction step of constructing a support structure supporting a first structure on an upper part of the post; a first structure mounting step of mounting the first structure on the support structure; a support structure lifting step of adding an extension member to the post to extend the post and lifting the support structure upward; a second structure construction step of constructing a second structure around and below the first structure; and a beam member connecting step of connecting the first structure and the second structure using a plurality of beam members.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for constructing a structure having a large dome-shaped roof.

Background Art

[0002] A dome-shaped large space structure having a large space is known (see, for example, Patent Document 1). This large space structure includes an annular compression ring (CR) disposed above, an annular tension ring (TR) having a larger diameter than the CR and disposed below, and a plurality of diagonal beams connecting the CR and the TR.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When it is necessary to accommodate large-scale internal equipment in the internal space of a dome-shaped large space structure, it is not always possible to accommodate the internal equipment in the completed large space structure. Therefore, there are cases where it is necessary to construct a dome-shaped large space structure after accommodating the internal equipment in advance before the roof structure is completed. Also, when rebuilding an existing structure, it is necessary to construct a dome-shaped large space structure while leaving the internal equipment. In the technique described in Patent Document 1, there has not yet been proposed a method for constructing a dome-shaped large space structure in a state where large-scale internal equipment exists in the internal space.

[0005] An object of the present invention is to provide a method for constructing a structure that enables the construction of a dome-shaped large space structure even in a state where large-scale equipment exists in the internal space.

Means for Solving the Problems

[0006] To achieve the above objective, the present invention provides a method for constructing a structure comprising: a first structure constructed in an annular shape; a second structure constructed in an annular shape with a larger diameter than the first structure and positioned around and below the first structure; and a plurality of beam members connecting the first structure and the second structure, the method comprising: a leg construction step for constructing legs on an installation surface; a support column construction step for constructing support columns so as to stand upright from the legs; a support structure construction step for constructing a support structure on the upper part of the support columns to support the first structure; a first structure placement step for placing the first structure on the support structure; a second structure construction step for constructing the second structure around and below the first structure; and a beam member connection step for connecting the first structure and the second structure with a plurality of beam members.

[0007] According to the present invention, a dome-shaped large-space structure can be constructed even when large-scale equipment is present in the internal space.

[0008] Furthermore, the present invention may also include a support structure removal step of separating the support structure from the support column and removing it through the opening of the first structure, and a support column removal step of dismantling the support column and removing it through the opening of the first structure.

[0009] According to the present invention, the support structure can be removed from the opening of the first structure.

[0010] Furthermore, the support structure removal step of the present invention may be configured to include a jack device shortening step of shortening a jack device positioned between the support structure and the first structure and releasing the support of the first structure from the support structure, and a support structure deformation step of deforming the support structure so that it has an outer diameter smaller than the inner diameter of the first structure.

[0011] According to the present invention, the support structure can be removed from the opening of the first structure.

[0012] Furthermore, the support structure of the present invention comprises a first support structure provided on the upper part of the support column, and a second support structure provided on the upper part of the first support structure for supporting the first structure, wherein the second support structure comprises a plurality of support members arranged radially in a plan view, the plurality of support members are provided to be movable with respect to the center in a plan view, and the support structure deformation step may include a support member movement step in which the plurality of support members are moved with respect to the center.

[0013] According to the present invention, by constructing the support structure to be deformable, it can be removed from the opening of the first structure.

[0014] Furthermore, the support column of the present invention may be constructed from a tubular member formed with an outer diameter smaller than the inner diameter of the opening of the first structure.

[0015] According to the present invention, by forming the support column so that it can be removed from the opening of the first structure, no special equipment is required, and construction costs can be reduced.

[0016] Furthermore, the support column of the present invention may be constructed by a truss structure formed with an outer diameter smaller than the inner diameter of the opening of the first structure.

[0017] According to the present invention, by forming the support column so that it can be removed from the opening of the first structure, no special equipment is required, and construction costs can be reduced. [Effects of the Invention]

[0018] According to the present invention, a dome-shaped large-space structure can be constructed even when large-scale equipment is present in the internal space. [Brief explanation of the drawing]

[0019] [Figure 1] This figure shows the configuration of a large-space structure according to an embodiment of the present invention. [Figure 2] This diagram shows the process of constructing the legs of a temporary support structure. [Figure 3] It is a plan view showing the configuration of the support structure. [Figure 4] It is a side sectional view showing the configuration of the support structure. [Figure 5] It is a sectional view showing the configuration of the support structure. [Figure 6] It is a sectional view showing the state of the first structure placed on the support structure. [Figure 7] It is a sectional view showing the process of constructing the second structure. [Figure 8] It is a sectional view showing the process of connecting the first structure and the second structure with a beam member. [Figure 9] It is a sectional view showing the process of lowering the jack of the support structure. [Figure 10] It is a sectional view showing the process of shortening the support structure in the radial direction. [Figure 11] It is a sectional view showing the process of removing the support structure. [Figure 12] It is a view showing the process of removing the support column. [Figure 13] It is a flowchart showing each process of the structure construction method.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, embodiments of a structure construction method according to the present invention will be described with reference to the drawings.

[0021] As shown in FIG. 1, the large - space structure 1 has a dome - shaped roof and is constructed so as to be able to accommodate large - scale equipment in the internal space. The large - space structure 1 includes, for example, a first structure 2 constructed in an annular shape, an annular second structure 10 disposed around and below the first structure 2, and a plurality of beam members 20 connecting the first structure and the second structure 10. Below the second structure 10, a wall portion 30 constructed along the second structure 10 is provided. The wall portion 30 may or may not be constructed by columnar bodies.

[0022] The first structure 2 is constructed, for example, by assembling steel members in an annular shape. The first structure 2 is also called a compression ring (CR). The first structure 2 is formed to have a predetermined first outer diameter and a first inner diameter. The first structure 2 has a circular opening 2H with a first inner diameter. The second structure 10 is constructed, for example, by assembling steel members in an annular shape. The second structure 10 is also called a tension ring (TR). The second structure 10 is formed to have a second outer diameter that is larger than the first outer diameter of the first structure 2. The second structure 10 is formed to have a second inner diameter that is larger than the first inner diameter of the first structure 2. The second structure 10 has a circular opening 10H with a second inner diameter.

[0023] The upper end of each beam member 20 is connected to the first structure 2. The multiple beam members 20 are arranged radially from the first structure 2 in a plan view. The lower end of each beam member 20 is connected to the second structure 10. The space between adjacent beam members 20 may be covered, for example, by a plate-shaped roof member or by a membrane-like membrane member. Also, the circular opening 2H formed in the first structure 2 may be covered by a plate-shaped roof member or by a membrane-like membrane member.

[0024] In large-span structure 1, it may be necessary to construct large-scale internal facilities within the internal space S to complete the large-span structure 1. Furthermore, it may be necessary to rebuild the large-span structure 1 while retaining existing large-scale internal facilities N. The following describes a structural construction method that allows for the construction of a dome-shaped large-span structure 1 even when internal facilities N exist within the internal space S. The large-span structure 1 is constructed using temporary support structures, described later, to temporarily support each member. It is desirable that these temporary support structures support each member during the construction of the large-span structure 1 and can be easily removed after the large-span structure 1 is completed.

[0025] As shown in Figure 2, the legs 61 that form the foundation of the temporary support structure 60 are constructed on the installation surface E, such as the floor (leg construction process). The legs 61, for example, consist of four leg members 62 arranged radially in a plan view. The leg members 62 may be constructed in other shapes as long as they can support the legs 61. After the legs 61 are installed, a support column 63 is constructed to stand upright from the center of each leg member 62 (support column construction process). The support column 63 is formed, for example, from a tubular member with an outer diameter smaller than the inner diameter of the opening of the first structure. The support column 63 may be, for example, a mast used in a tower crane (TC). The mast is formed in a tubular shape with an outer diameter of about 1800 mm. This allows the support column 63 to pass through the opening 2H inside the first structure 2. The support column 63 also prevents it from becoming an obstacle when installing large-scale equipment. The support column 63 is fastened to the leg portion 61, for example, using bolts and nuts.

[0026] The support column 63 is configured to be extendable by adding extension members 63E, which are formed in the shape of a cylindrical tube of the same diameter. The extension members 63E are fastened together, for example, using multiple bolts and nuts. As a result, the support column 63 is provided with a dividing section 63D that divides the support column 63 into at least two members in the axial direction. The support column 63 may be constructed as a truss structure with an outer diameter smaller than the inner diameter of the first structure 2. A support structure 64 for supporting the first structure 2 is constructed on the upper part of the support column 63 (support structure construction process).

[0027] As shown in Figures 3 and 4, the support structure 64 comprises a first support structure 65 provided on the upper part of the support column 63, and a second support structure 66 provided on the upper part of the first support structure 65. The first support structure 65 is formed, for example, by arranging eight beam members 65H radially in a plan view. The number of beam members 65H may be eight or fewer, or eight or more. A hook portion 65A used for suspension is provided at the center of the first support structure 65. The second support structure 66 is provided with a plurality of support members 67 that are placed on the upper part of each beam member 65H in a plan view and are arranged radially from the center of the first support structure 65. The plurality of support members 67 support the first structure 2. The beam members 65H and support members 67 are formed, for example, of steel having an H cross section. The plurality of support members 67 are provided so as to be movable relative to the center of the first support structure 65 along the axial direction of the beam members 65H in a plan view.

[0028] The support member 67 is fixed to the first support structure 65, for example, using bolts and nuts. The support member 67 may also be welded to the first support structure 65. When the fixation between the support member 67 and the first support structure 65 is released, the support member 67 is configured to slide against the first support structure 65 using a towing device such as a chain block fixed to the hook portion 65A. A sliding mechanism, described later, that allows the support member 67 to move may be provided between the support member 67 and the first support structure 65, or the support member 67 may simply be placed on top of it.

[0029] As shown in Figure 5, the sliding mechanism 65G is provided on a plate-shaped flange portion 65H1 located on the upper part of the beam member 65H. The sliding mechanism 65G is formed by a pair of plate-like bodies 65G1 provided at both ends of the flange portion 65H1 when the beam member 65H is viewed in cross-section in the short direction. The pair of plate-like bodies 65G1 are formed in a strip shape. The pair of plate-like bodies 65G1 are welded to both ends of the flange portion 65H1 along the longitudinal direction of the flange portion 65H1. The multiple support members 67 can move along the longitudinal direction of the beam member 65H on the upper part of the beam member 65H. As the multiple support members 67 move toward the center of the first support structure 65, the support structure 64 can be deformed to have an outer diameter smaller than the inner diameter of the opening 2H of the first structure 2.

[0030] As shown in Figure 6, the first structure 2 is placed on the upper surface of the support structure 64 (first structure placement process). The first structure 2 is constructed on the ground in advance and placed on the support structure 64 using a crane or the like. The first structure 2 may also be constructed on the upper side of the support structure 64 provided on the support column 63. Multiple jack devices C are provided between the support structure 64 and the first structure 2. The multiple jack devices C are placed on multiple support members 67. The multiple jack devices C support the first structure 2 in an extended state. The multiple jack devices C support the first structure 2 in an elevated state relative to the support structure 64.

[0031] The support structure 64 may be assembled on the ground beforehand, then lifted upwards (support structure lifting process), and then fixed to the top of the support column 63. In this case, the support structure 64 may be lifted upwards with the temporary first structure 2 placed on top of it, and then fixed to the top of the support column 63. Through the above process, a temporary support structure 60 is constructed, and the first structure 2 is held in a supported state above the temporary support structure 60.

[0032] As shown in Figure 7, the second structure 10 is constructed around and below the first structure 2 (second structure construction process). In this process, before the construction of the second structure 10, a wall section 30 that supports the second structure 10 is provided. The wall section 30 may be composed of a frame such as columnar bodies or a truss structure. In parallel with this process, internal equipment N may be constructed in the area that will become the internal space S of the large-space structure 1. The internal equipment N may be existing equipment.

[0033] As shown in Figure 8, after the second structure 10 is constructed, the first structure 2 and the second structure 10 are connected by a plurality of beam members 20 (beam member connection process). The upper end of the beam members 20 is connected to the first structure 2. The beam members 20 and the first structure 2 are fastened together, for example, using bolts and nuts. The beam members 20 and the first structure 2 may also be fixed by welding. The lower end of the beam members 20 is connected to the second structure 10. The beam members 20 and the second structure 10 are fastened together, for example, using bolts and nuts. The beam members 20 and the second structure 10 may also be fixed by welding. Based on the above steps, the large-space structure 1 is constructed. After that, the temporary support structure 60 is removed from the large-space structure 1. The process will now be explained.

[0034] As shown in Figure 9, first, the jacking device C, which is positioned between the support structure 64 and the first structural body 2, is shortened. The first structural body 2 descends slightly as the jacking device C is shortened, but at a certain position it is supported by multiple beam members 20, thus releasing the support of the first structural body 2 from the support structure 64 (jacking device shortening process).

[0035] As shown in Figure 10, the support structure 64 is deformed so that its outer diameter is smaller than the inner diameter of the opening 2H of the first structure 2 (support structure deformation step). In this step, the fixing between the multiple support members 67 provided on the support structure 64 and each beam member 65H is released. The support members 67 are moved toward the center of the first support structure 65 using a traction device such as a chain block L (support member movement step).

[0036] As shown in Figure 11, the support structure 64 is separated from the support column 63 and removed through the opening 2H of the first structure 2 (support structure removal process).

[0037] As shown in Figure 12, the support column 63 is disassembled into a plurality of extension members 63E and removed through the opening 2H of the first structure (support column removal process). The extension members 63E may be removed one or more in a continuous manner. The leg portion 61 is removed, for example, by being divided into a plurality of leg members 62. If the plurality of leg members 62 can be removed through the opening 2H, they may be removed while still fixed to one or more extension members 63E after being released from their fixation to the installation surface E.

[0038] Figure 13 shows the flow of steps for constructing a large-span structure comprising a first structure 2 constructed in a ring shape, a second structure 10 constructed in a ring shape with a larger diameter than the first structure 2 and positioned around and below the first structure 2, and a plurality of beam members 20 connecting the first structure 2 and the second structure 10. Step S100: Construct legs 61 on the installation surface E. Step S102: Construct support columns 63 so that they stand upright from the legs 61. Step S104: Construct support structures 64 to support the first structure 2 on the upper part of the support columns 63. Step S106: Place the first structure 2 on the support structures 64.

[0039] The second structure 10 is constructed around and below the first structure 2 (step S108). The first structure 2 and the second structure 10 are connected by a plurality of beam members 20 (step S110). The support structure 64 is separated from the support column 63 and transported out through the opening 2H of the first structure 2 (step S112). The support column 63 is dismantled and transported out through the opening 2H of the first structure 2 (step S114).

[0040] As described above, according to the structural construction method, the large-space structure 1 can be constructed even when existing internal facilities N exist or while constructing the internal facilities N. According to the structural construction method, by using support columns 63 constructed from existing tower crane masts, etc., as temporary support members for the first structure 2, the amount of space occupied by the temporary support members can be reduced, making it easier to install large-scale equipment in the internal space of the large-space structure 1. According to the structural construction method, the support structure 64 connected to the upper part of the support columns 63 is configured to be expandable and contractible in the radial direction, so after the construction of the large-space structure 1, it can be lifted out through the opening 2H of the annular first structure 2, making dismantling work easier.

[0041] Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be modified as appropriate without departing from the spirit of the invention. For example, each step of the structure construction method may be rearranged as appropriate. [Explanation of Symbols]

[0042] 1 Large space structure 2 First structure 2H opening 10 Second structure 10H opening 20 Beam members 30 Wall 60 Temporary support structure 61 Legs 62 Leg members 63 Pillar 63D split part 63E Extension member 64 Support structure 65 1st support structure 65A Hook section 65G sliding mechanism 65G1 Plate-like body 65H beam material 65H1 Flange section 66 Second support structure 67 Support member C Jacking device CR Compression Ring E Installation surface L Chain Block S interior space TC Tower Crane TR Tension Ring

Claims

1. A method for constructing a structure comprising: a first structure constructed in a ring shape; a second structure constructed in a ring shape with a larger diameter than the first structure, positioned around and below the first structure; and a plurality of beam members connecting the first structure and the second structure, The leg construction process involves constructing the legs on the mounting surface, A column construction step involves constructing a support column so that it stands upright from the aforementioned leg portion, A support structure construction step involves constructing a support structure to support the first structure on the upper part of the support column, A first structure placement step of placing the first structure on the support structure, A second structure construction step, in which the second structure is constructed around and below the first structure, The system includes a beam member connecting step of connecting the first structure and the second structure with a plurality of beam members, A support structure removal process involves separating the support structure from the support column and removing it through the opening of the first structure, The process includes a column removal step of dismantling the column and removing it through the opening of the first structure, The aforementioned support structure removal process is as follows: A jack device shortening step involves shortening the jack device positioned between the support structure and the first structure, thereby releasing the support of the first structure from the support structure. A method for constructing a structure, comprising: a support structure deformation step of deforming the support structure so that it has an outer diameter smaller than the inner diameter of the first structure.

2. The support structure comprises a first support structure provided on the upper part of the support column, and a second support structure provided on the upper part of the first support structure for supporting the first structure. The second support structure comprises a plurality of support members arranged radially in a plan view, The aforementioned plurality of support members are provided to be movable relative to the central direction when viewed in plan, The aforementioned support structure deformation process is, The process includes a support member movement step in which a plurality of the support members are moved in the direction of the center, The method for constructing a structure according to claim 1.

3. The support column is constructed from a tubular member formed with an outer diameter smaller than the inner diameter of the opening of the first structure. A method for constructing a structure according to claim 1 or 2.

4. The support column is constructed by a truss structure with an outer diameter smaller than the inner diameter of the opening of the first structure. A method for constructing a structure according to claim 1 or 2.

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