JP3069438B2 - Construction method of single layer truss dome roof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a single-layer truss dome roof constituting a building such as a multipurpose hall having a large space whose outer periphery is covered by a wall.

[0002]

2. Description of the Related Art Currently, a dome roof covering a large space of a building such as a stadium has been developed so that a player can play a game regardless of rainy weather.

[0003] Currently, as the dome roof structure, there are a space truss structure and a plane truss structure.

[0004] The dome roof 100 having a three-dimensional truss structure is constructed with rigidity itself, so that even if it is lifted up as it is, it can be bridged over the building space as shown in FIG. However, the material used is almost twice as large as that of the flat truss structure, so that economical design was not possible. On the other hand, a dome roof having a flat truss structure can be said to be economical in view of the cost of the roof members.

However, the dome roof of the flat truss structure is
It is constructed over the building space, and the outer periphery of the dome roof is joined to the upper part of the building. Therefore, as shown in FIG. 8, at the construction site, the dome roof 102 is constructed on the temporary gantry 104 assembled to the height of the roof at the time of completion, and after the entire dome roof is completed, the outer periphery of the dome roof is completed. The method of joining the building to the building and removing the temporary gantry has been adopted.

[0006]

However, if the temporary gantry that supports the entire dome roof is assembled and disassembled,
The construction period cannot be shortened, and the temporary cost cannot be reduced. In addition, since the construction of the dome roof is a work at a high place, the degree of freedom of work is limited, and quality control becomes extremely difficult.
The incidence of crashes and falling disasters also increases.

The present invention has been made in view of the above circumstances, and has as its object to provide a method of constructing a single-layer truss dome roof capable of reducing the number of temporary gantry and avoiding work at height.

[0008]

According to a first aspect of the present invention, there is provided a method for constructing a single-layer truss dome roof for covering an upper part of a dome building. A step of constructing the outer block constituting the outer peripheral portion of the layered truss dome roof and an inner block constituting the central portion separately, and connecting the outer peripheral portion of the outer block to the upper portion of the dome building with a pin, and It is characterized by comprising a step of slidably joining the inner peripheral portion of the block with a pin, and a step of raising the inner block to a desired position and setting the respective pin joining and slidable states to a fixed state.

In the method for constructing a single-layer truss dome roof according to the invention as set forth in claim 2, when the inner block is lifted, a prestress is introduced into all the blocks by a hydraulic jack on an inner peripheral portion of the outer block. It is characterized by:

According to a third aspect of the present invention, in the method for constructing a single-layer truss dome roof covering an upper part of a dome building, the outer periphery of the single-layer truss dome roof on a temporary gantry is provided. A step of building separately into an outer block constituting the part and an inner block constituting the central part, and connecting the outer peripheral part of the outer block to the upper part of the dome building so as to be horizontally movable, and connecting the inner block and the outer block. It is characterized by comprising a step of pin-joining the inner peripheral portion, and a step of lifting the internal block to a desired position and fixing the pin-joint and horizontally movable state to a fixed state.

According to a fourth aspect of the present invention, in the method for constructing a single-layer truss dome roof, when the inner block is lifted, a prestress is introduced into all blocks by a hydraulic jack on an outer peripheral portion of the outer block. It is characterized by.

[0012]

According to the first aspect of the present invention, a temporary gantry is installed near the ground on the premises of the dome building, and a single-layer truss dome roof is divided into an inner block and an outer block, and constructed thereon. The outer periphery of the outer block is pin-joined to the top of the dome building. The inner peripheral portions of the inner block and the outer block are slidably joined with pins. Thereafter, the internal block is lifted to a desired position, and then the pin-joined portion and the slidable portion are fixed. Therefore, there is no need to assemble the temporary gantry to the height of the roof when completed.

According to the second aspect of the invention, when the inner block is lifted to a desired position, prestress is introduced from the inner peripheral portion of the outer block by the hydraulic jack. Therefore, the member cross sections of all the blocks can be reduced.

According to the third aspect of the present invention, a temporary gantry is installed near the ground on the premises of the dome building, and a single-layer truss dome roof is constructed thereon by dividing it into an inner block and an outer block. The outer periphery of the outer block is pin-joined to the upper part of the dome building so as to be horizontally movable. The inner periphery of the inner block and the outer periphery of the outer block are joined with pins. After that, the internal block is lifted to a desired position, and then a pin-joined portion or a horizontally movable portion is fixed. This eliminates the need to provide a slide mechanism at the joint between the inner block and the outer block.

According to the fourth aspect of the invention, when the inner block is lifted to a desired position, prestress is introduced from the outer peripheral portion of the outer block by the hydraulic jack.
Therefore, the member cross sections of all the blocks can be reduced.

[0016]

1 and 2 show a dome type building 10 according to a first embodiment. This dome type building 10
Is surrounded by a cylindrical wall body 12 erected on the ground, and a stepped audience seat 14 is provided on the inner peripheral surface thereof. The outer periphery of the single-layer truss dome roof 16 is supported by the wall body 12. The flat space 18 covered by the wall 12 and the single-layer truss dome roof 16 is a space used as a multipurpose hall such as a stadium or an exhibition hall.

As shown in FIG. 1, the single-layer truss dome roof 16 has a main member 16A and an auxiliary member 16B formed into a triangular shape by pin bonding, and the triangular shapes are joined together to form a cross section. The shape is parabolic. The single-layer truss dome roof 16 is divided into an inner block 20 and outer blocks 22, 24, and 26 arranged symmetrically with respect to the inner block 20.

The inner block 20 includes twelve main members 16.
A has a regular hexagonal truss structure. The outer block 22 has a substantially trapezoidal planar shape,
The main member 16A of the outer peripheral portion and the internal member have a truss structure with the auxiliary member 16B. External block 24
Has the same structure as the outer block 22,
The surface area is made smaller than 2. Outer block 26
Is formed in a substantially triangular shape, and a truss structure is formed by a main member 16A on the outer peripheral portion and an auxiliary member 16B inside. The outer block 26 has a smaller surface area than the outer blocks 22 and 24.

A method for constructing a single-layer truss dome roof according to the first embodiment will be described below with reference to FIGS.

As shown in FIG. 2, a temporary gantry 28 is constructed corresponding to the sectional shape of each block 20, 22, 24, 26 of the single-layer truss dome roof 16. At that time, the top 12A of the wall 12 and the outer blocks 22, 24,
26, a freely rotatable pin support 3
0, and the external blocks 22, 24, 26 are attached. Further, a hydraulic jack 34 capable of lifting up the inner block 20 is installed in the plane space 18 (in the present embodiment, a total of seven points, one at each vertex of a triangle forming the inner block 20). Thus, a single-layer truss dome roof 16 having a shape as shown by a solid line in FIG. 2 is constructed. Hereinafter, that the single-layer truss dome roof 16 is at the position of the solid line portion is referred to as a first step.

As shown in FIG.
The tip of the main member 16A is joined to the main member 16A of the outer block 24 via a hydraulic jack 32 with a pin 32A. The hydraulic jack 32 is fixed (rigidly joined) to the main member 16A, and a rotatable pin member of a piston 32B is joined to the pin 32A. Similarly, four hydraulic jacks 32 are connected to the external block 22, three to the external block 24, and two to the external block 26.

All blocks 2 are controlled by the hydraulic jack 32.
After introducing prestress at 0,22,24,26,
As shown in FIG. 2, the internal block 20 is lifted by using a hydraulic jack 34 while adjusting the stroke of the hydraulic jack 32 to a position indicated by a dashed line. that time,
Since the outer peripheral portion of the outer block 24 is pivotally supported by the pin support portion 30, the outer block 24 is lifted in a bent state at the joint portion of the pin 32A. Hydraulic jack 32
Is in the most contracted state as shown by the dashed line in FIG. Hereinafter, the fact that the single-layer truss dome roof 16 is at the position indicated by the chain line is referred to as a second step.

When the inner block 20 is further raised to the position shown by the two-dot chain line, the movement is stopped. Thereby, the dome building 10 is covered with the single-layer truss dome roof 16. Next, each block 20, 22, 24,
26 is fixed by using the auxiliary member 16B, and the cover plate 42 is used to fix the part rotatable by the pin 32A, the main member 16A, and the joint member 32. Hereinafter, that the single-layer truss dome roof 16 is located at the position indicated by the two-dot chain line is referred to as a third step.

As described above, since the prestress is introduced by the hydraulic jack 32 in the present embodiment, the member cross sections of all the blocks 20, 22, 24, 26 can be reduced. Also, since the single-layer truss dome roof 16 is temporarily installed near the ground, the amount of material used for the temporary gantry can be reduced, and the costs for assembling and dismantling the temporary gantry can be reduced, and the construction period can be reduced. It can also be shortened. Since work at high places can be greatly reduced, work safety can also be improved. Further, since the work is performed at a place close to the ground, the degree of freedom of the work is high, the positioning accuracy is increased, and the accuracy of the construction is improved.

Next, a second embodiment will be described with reference to FIGS. As shown in FIG. 4, similarly to the first embodiment, the single-layer truss dome roof 16 includes an inner block 20.
And external blocks 22, 24 and 26. Also,
A temporary gantry 28 is provided in the dome-shaped building 10. A hydraulic jack 34 is installed in the flat space 18. A rail 36 (shown in FIG. 6) is laid on the top 12 </ b> A of the wall 12, and a pin joint 38 is installed on the rail 36. The hydraulic jack 44 is fixed on the top 12A. The pin joint 38 is pin-joined to the tip of the piston 44 </ b> A of the hydraulic jack 44, and can move horizontally on the rail 36. External blocks 22, 24, 2
The outer peripheral portions of No. 6 are joined, and a total of 12 locations are installed. A pin joint 40 is provided at the joint between the inner block 20 and the outer blocks 22, 24, 26. In this embodiment, 18 pin joints 40 are provided.

As shown in the first step of FIG. 5, the inner block 20 and the outer blocks 22,
4, 26 (the external block 24 is shown in FIG. 5)
To build. Next, the inner block 20 is lifted up to the second step using the hydraulic jack 34. At this time, prestress is introduced by the hydraulic jack 44 on the top 12A. As shown in FIG. 6, the pin joint 38 is located at the point A in the first step, but is moved to the point B by being pulled by the internal block 20 in the second step. Further, when the inner block 20 is lifted to the position of the third step, which is the desired position, the pin joint 38
Moves to point C. Thus, the outer block 22,
By horizontally moving the pin joint 38 provided on the outer peripheral portion of each of the outer blocks 24 and 26, it is not necessary to provide a slide mechanism at the joint between the inner block 20 and the outer blocks 22, 24 and 26. As described above, the hydraulic jack 44 is disposed on the top 12A of the wall 12 and
Since the prestress is introduced into the blocks 4 and 26, the member cross sections of the blocks 20, 22, 24 and 26 can be reduced. The description of the other operations and effects similar to those of the first embodiment is omitted.

[0027]

According to the method for constructing a single-layer truss dome roof according to the present invention, since the above-mentioned structure is employed, the single-layer truss dome roof can be assembled near the ground and the amount of temporary materials used can be reduced. In addition, the construction cost can be reduced, and the temporary gantry can be easily disassembled after the completion of the single-layer truss dome roof, so that the construction period can be shortened. Also,
Work at height can be significantly reduced, and work safety can be improved. Further, since the work is performed near the ground, there is an excellent effect that the degree of freedom of the work is high, the positioning accuracy is high, and the accuracy of the construction is improved.

[Brief description of the drawings]

FIG. 1 is a roof plan view of a dome-type building to which a first embodiment of a method for constructing a single-layer truss dome roof according to the present invention is applied.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 shows details of a joint member when the first embodiment of the method for constructing a single-layer truss dome roof of the present invention is applied.
FIG.

FIG. 4 is a roof plan view of a dome-shaped building to which a second embodiment of the method for constructing a single-layer truss dome roof according to the present invention is applied.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a detailed view of FIG. 2 showing details of an outer peripheral pin joint when the second embodiment of the method for constructing a single-layer truss dome roof of the present invention is applied.

FIG. 7 is a cross-sectional view showing a state in which a dome roof of a three-dimensional truss structure in a conventional example is laid over a building space.

FIG. 8 is a cross-sectional view illustrating a state in which a dome roof having a flat truss structure according to a conventional example is assembled on a temporary gantry when the dome roof is bridged over a building space.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dome type building 12A Top of wall 12 16 Single-layer truss dome roof 20 Internal block 22 External block 24 External block 26 External block 28 Temporary gantry

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Ishikawa 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Hiromichi Yamada 8-2-1-1, Ginza, Chuo-ku, Tokyo No. Takenaka Corporation Tokyo Main Store (72) Inventor Tomohisa Okuno 8-21-1, Ginza, Chuo-ku, Tokyo Tokyo Main Company (72) Inventor Kazuhiro Inoue 8-Chome Ginza, Chuo-ku, Tokyo No. 21-1 Takenaka Corporation Tokyo Main Store (72) Inventor Toshiya Kashimura 8-21-1, Ginza, Chuo-ku, Tokyo Inside 21-2 Takenaka Corporation Tokyo Main Store (72) Inventor Takashi Matsuzaki Ginza, Chuo-ku, Tokyo 8-21-1, Takenaka Corporation, Tokyo Head Office (72) Inventor Yasuhiko Shuto 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation (56) References JP-A-4-89940 (JP, A) JP-A-2-304238 (JP, A) JP-A-60-258355 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/32 102 E04B 7/08

Claims (4)

(57) [Claims] 1. A method for constructing a single-layer truss dome roof covering an upper part of a dome building, wherein the single block is divided into an external block constituting an outer peripheral portion of the single-layer truss dome roof and an internal block constituting a central portion on a temporary gantry. A step of building, a step of pin-joining an outer peripheral portion of the outer block to an upper portion of the dome building, and a step of slidably pin-joining the inner peripheral portion of the inner block and the inner block of the outer block to a desired position. Lifting and setting the pin joint and the slidable state to a fixed state. 2. The construction of a single-layer truss dome roof according to claim 1, wherein when the inner block is lifted, prestress is introduced into all blocks by a hydraulic jack on an inner peripheral portion of the outer block. Method. 3. A method for constructing a single-layer truss dome roof covering an upper part of a dome building, wherein an external block constituting an outer peripheral portion of the single-layer truss dome roof and an internal block constituting a central portion are divided on a temporary gantry. A step of constructing, a step of connecting the outer peripheral portion of the outer block to the upper part of the dome building so as to be horizontally movable, and a step of pin connecting the inner block and the inner peripheral portion of the outer block to a desired position. And fixing the pin connection and the horizontally movable state to a fixed state. 4. The method for constructing a single-layer truss dome roof according to claim 3, wherein when the inner block is lifted, a prestress is introduced into all the blocks by a hydraulic jack on an outer peripheral portion of the outer block. .