JPH0626104A - Construction of domelike roof - Google Patents

Abstract

PURPOSE:To reduce mandays on operation and temporary cost, and to improve the safety of operation in a dome-like roof, in which an outer circumferential section is composed of a double layer truss and a central section of a single layer truss. CONSTITUTION:A temporary frame base 22 is disposed annularly onto the ground at the central section of a building 12. A double layer truss 16 is constructed to the upper section of the building 12 while the overhanging section of the base 22 is supported by the temporary frame base 22. A single layer truss 18 is built on a ground surface, the outer circumferential section of the truss 18 is lifted up guided by the temporary frame base 22, and the inner circumferential section of the double layer truss 16 and the outer circumferential section of the single layer truss 18 are joined when the outer circumferential section of the truss 18 reaches a fixed position, thus erecting a dome-like roof 10.

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 dome roof covering a large space such as a stadium.

[0002]

2. Description of the Related Art At present, a dome roof covering a large space of a building such as a stadium has been developed so that a game can be performed regardless of rain.

By the way, the dome roof structures currently proposed include a multi-layer truss (referred to as a space truss or a parallel chord truss) and a single-layer truss (referred to as a plane truss).

As shown in FIG. 12, since the dome roof 100 having a multi-layer truss structure is constructed by itself having rigidity, it can be lifted up as it is and bridged over the building space. However, since the amount of structural members used is larger than that of a single-layer truss, economical design was not possible. On the other hand, a dome roof with a single-layer truss structure can be said to be economical when considering the cost of the roof member.

However, the dome roof 102 of the single-layer truss structure shown in FIG. 11 is constructed for the first time by straddling the space of the building and joining the outer peripheral portion of the dome roof 102 to the upper part of the building. . Therefore, 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, the outer periphery of the dome roof 102 is joined to the building, and the temporary gantry 104 is removed after the entire dome roof 102 is completed. The method is adopted.

However, if the temporary gantry 104 for supporting the entire dome roof 102 is assembled and disassembled, the construction period cannot be shortened and the temporary construction cost cannot be reduced. Moreover, since the construction of the dome roof 102 is performed at a high place, the degree of freedom of work is limited, and quality control becomes very difficult.
The incidence of crashes and fall accidents also increases.

[0007] Therefore, in order to reduce the number of temporary gantry and avoid work at high places, the dome roof is constructed by dividing it into an inner member covering the central portion of the space and an outer member covering the outer peripheral portion of the space. A method is also possible.

According to this split construction method, the inner member constructed near the ground is lifted up and joined to the outer member constructed so as to project from the upper part thereof toward the space along the outer periphery of the building, Since the entire dome roof can be constructed, the number of temporary gantry can be reduced.

However, in the above-mentioned construction method, the inner member is lifted up by the temporary gantry for lifting up arranged on the outer peripheral portion of the inner member.
At the time of the lift-up, it is necessary to introduce prestress in the circumferential direction and the radial direction of the inner member so that the inner member is not deformed by its own weight, and the outer member constructed by dividing it into the space of the building. Since it is a cantilevered single-layer truss that projects toward the outside, it is necessary to introduce prestress to the outside of the radius in order to prevent flexural deformation. For this reason, the number of work steps and the cost of introducing prestress increase, and there is a problem in adopting the lift-up method which is advantageous in terms of construction period and safety.

Therefore, the applicant of the present invention has proposed a dome roof in which the outer peripheral portion of the dome roof is constituted by a multi-layer truss and the central portion thereof is constituted by a single-layer truss, but the safety and cost aspects can be cleared. The construction method is demanded.

[0011]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention is directed to a dome roof having a multi-layer truss on the outer periphery and a single-layer truss on the center, which reduces the man-hours and the temporary construction cost, and reduces the work cost. It is an object to provide a method for constructing a dome roof with improved safety.

[0012]

In the method for constructing a dome roof according to claim 1, a dome roof for covering a space provided in a central portion of the building constitutes an outer peripheral portion of the dome roof, and is formed from an upper portion of the building. A multi-layered truss that projects toward the space and a central part of the dome roof, is lifted up and bridged over the space, and its outer peripheral portion is joined to the inner peripheral portion of the multi-layered truss. In the method of constructing a dome roof constructed with a single-layer truss, the first step of arranging a temporary gantry in an annular shape on the ground in the central part of the building and the multi-layer truss while supporting the overhanging portion with the temporary gantry. A second step of constructing the single-layer truss, a third step of constructing the single-layer truss on the ground surface, and lifting up the outer peripheral portion while guiding the outer periphery to the temporary gantry, and lifting up the single-layer truss to a predetermined position,
And a fourth step of joining the inner peripheral portion of the multi-layer truss and the outer peripheral portion of the single-layer truss.

In the method for constructing a dome roof according to a second aspect of the present invention, the dome roof covering the space provided in the central portion of the building constitutes the outer peripheral portion of the dome roof and projects from the top of the building toward the space. Constructed with a multi-layer truss and a substantially hemispherical single-layer truss that constitutes the center of the dome roof, lifts up, spans over the space, and its outer periphery is joined to the inner periphery of the multi-layer truss In the method of constructing a dome roof, a manufacturing yard is provided on a circular track laid on the upper part of the building, and the multi-layer truss is divided into blocks on this manufacturing yard, and the blocks are assembled and sequentially sent out on the track to form blocks. The outer periphery of the dome roof is configured by joining the multi-layer trusses.

In the method for constructing a dome roof according to a third aspect, the dome roof covering the space provided in the central portion of the building constitutes the outer peripheral portion of the dome roof and projects from the upper part of the building toward the space. Constructed with a multi-layer truss and a substantially hemispherical single-layer truss that constitutes the center of the dome roof, lifts up, spans over the space, and its outer periphery is joined to the inner periphery of the multi-layer truss In the method for constructing a dome roof, a circular fixed gantry is provided on the ground in the center of the building, and a fan-shaped movable gantry that rotates around the fixed gantry is provided, and the single-layer truss is placed on the movable gantry. Then, the block is divided into blocks and assembled, and then, one block of single-layer truss is assembled and completed. Then, the center of the assembled one-block single-layer truss is supported by a fixed gantry to rotate the moving gantry. ,
It is characterized in that a single-layer truss of the next block is assembled on the rotating movable gantry and the blocks are sequentially joined to form a central portion of a substantially hemispherical dome roof.

In the method for constructing a dome roof according to a fourth aspect, the dome roof covering the space provided in the central portion of the building constitutes the outer peripheral portion of the dome roof and projects from the upper part of the building toward the space. Constructed with a multi-layer truss and a substantially hemispherical single-layer truss that constitutes the center of the dome roof, lifts up, spans over the space, and its outer periphery is joined to the inner periphery of the multi-layer truss In the method of constructing a dome roof, a supporting portion is provided which projects from the multi-layer truss to the outside of the building, and pulleys are arranged on the supporting portion and the projecting portion of the multi-layer truss. It is characterized in that the single-layer truss constructed on the ground surface at the center of the building is lifted by a wire wound by a winding device arranged outside.

[0016]

According to the first aspect of the present invention, the dome roof covering the space provided in the center of the building constitutes the outer periphery of the dome roof, and the multi-layer truss protruding from the upper part of the building toward the space,
It is constructed by dividing it into a substantially hemispherical single-layer truss that constitutes the central part of the dome roof, is lifted up and spanned over the space, and the outer peripheral part is joined to the inner peripheral part of the multi-layer truss.

First, the temporary gantry is annularly arranged at a predetermined interval on the ground in the center of the building. This temporary gantry supports the projecting portion of the multi-layer truss constructed in the upper part of the building, and prevents the multi-layer truss from bending and deforming due to its own weight. On the other hand, a substantially hemispherical single-layer truss is constructed on the ground surface and lifted up while its outer peripheral portion is restrained by a temporary gantry, so that the single-layer truss retains a circular shape without being deformed. Also, since the single-layer truss is constructed on the ground surface, work at high places is eliminated, and the freedom of work is increased,
Furthermore, the incidence of crashes and fall accidents is reduced. When the single-layer truss is lifted up to a predetermined position, the inner peripheral portion of the multi-layer truss and the outer peripheral portion of the single-layer truss are joined together to form a central portion of the dome roof.

According to the second aspect of the invention, the manufacturing yard is provided on a circular track laid on the upper part of the building,
On this production yard, multi-layer trusses divided into blocks are assembled. The block-shaped and assembled multi-layer truss is sequentially sent out on the track and joined. As a result, a multi-layer truss forming the outer peripheral portion of the dome roof is constructed. Therefore, since the multi-layer truss can be assembled in one production yard, the work can be integrated.

Further, in the invention according to claim 3, the single-layer truss is a circular fixed gantry provided on the ground in the center of the building, and a fan-shaped movable gantry that rotates around the fixed gantry. Is divided into blocks and assembled. Next, after the one-block single-layer truss is assembled, the center portion of the assembled one-block single-layer truss is supported by the fixed gantry and the moving gantry is rotated. Next, the single-layer truss of the next block is assembled on the rotated moving gantry, and the blocks are sequentially joined to construct a substantially hemispherical single-layer truss. For this reason, it is not necessary to provide a circular construction gantry that supports the entire single-layer truss, so that the amount of temporary material can be reduced accordingly. Furthermore, since the work can be integrated, work efficiency is improved.

Further, in the invention according to claim 4, a supporting portion which projects from the multi-layer truss to the outside of the building is provided, and pulleys are arranged at the supporting portion and the projecting portion of the multi-layer truss. A single-layer truss constructed on the ground surface at the center of the building is lifted by the wire wound by a winding device arranged outside the building through this pulley, and lifted up to a predetermined height.
For this reason, the temporary gantry for guiding and lifting up the single-layer truss as described above is not required, the temporary installation cost can be reduced, and the separate crane need not be deployed.

[0021]

EXAMPLE FIG. 9 and FIG. 10 show a dome roof 10 constructed by the method for constructing a dome roof according to the first example.

The dome roof 10 covers a circular arena portion 14 and a stand portion 20 provided in the center of the building 12. On the upper part of the building 12, a multi-layer truss 16 forming the outer peripheral part of the dome roof is arranged along the outer periphery of the building 12,
It is constructed so as to project toward the upper part of the arena portion 14. As a result, as shown in FIG. 9, the locus drawn by the inner peripheral portion of the doughnut-shaped multi-layer truss 16 has a circular shape in plan view.

At the inner peripheral portion of the multi-layer truss 16, a substantially hemispherical single-layer truss 18 which constitutes the central portion of the dome roof 10.
Are joined together and bridged above the arena portion 14.

Here, a method of constructing the dome roof according to the first embodiment will be described. As shown in FIGS. 1 and 2,
A temporary gantry 22 is arranged on the ground of the arena 14 while avoiding the stand 20. As shown in FIG. 1, the temporary gantry 2
2 is composed of four standing H-shaped steels and is reinforced by braces (not shown). The temporary gantry 22 is annularly arranged along the inner peripheral portion of the arena portion 14 and is integrally connected by a lateral member. The projecting portion of the multi-layer truss 16A, which is divided and assembled into blocks, is supported by the upper end of the temporary gantry 22. As shown in FIG. 3, the multi-layer truss 16 is assembled outside the building 12, hung by a crane 30, and connected at the top of the building 12 to sequentially construct the outer peripheral portion of the dome roof 10. The upper part of the arena part 14 is covered.

Next, as shown in FIG. 2, the arena part 14
The semi-spherical layer truss 18 is constructed on the temporary gantry 24 assembled so that the locus drawn by its tip from the ground surface is substantially hemispherical. When the construction of the single-layer truss 18 is completed, the single-layer truss 18 is lifted up by a hydraulic jack or winch (not shown) provided above the temporary gantry 22. At this time, the outer peripheral portion of the single-layer truss 18 is
Since it is constrained by the temporary gantry 22, it retains a circular shape without being deformed. Next, the single-layer truss 18 is lifted up to the upper part of the temporary gantry 22, and the outer peripheral portion of the single-layer truss 18 and the inner peripheral portion of the multi-layer truss 16 are joined. As a result, the single-layer truss 18 is joined to the outer peripheral portion of the multi-layer truss 16 and exhibits the strength peculiar to the dome roof.

Next, a method for constructing the dome roof according to the second embodiment will be described. The second embodiment is characterized by the method of constructing the multi-layer truss 16. That is, as shown in FIGS. 4 and 5, a circular track 34 is laid along the upper portion of the building 12. A manufacturing yard 36 for assembling the multi-layer truss 16 is arranged on a part of the track 34. On this production yard 36, the multi-layer truss 16A divided into blocks is assembled. Wheels 35 are provided below the multi-layer truss 16A so that they can move on the track 34. The block-shaped multi-layer truss 16A is sequentially sent out on the track 34 and connected to form the outer peripheral portion of the dome roof 10. As described above, by assembling the multi-layer truss 16A in one manufacturing yard 36, the work can be integrated and the work efficiency is improved. In addition, temporary materials can be reduced. The final block of the multi-layer truss 16A is directly built on the upper part of the building 12 after the production yard 36 is removed.

Next, a method for constructing the dome roof according to the third embodiment will be described. The third embodiment is characterized by the method of constructing the single-layer truss 18. That is, as shown in FIGS. 6 and 7, the temporary gantry 38 on which the substantially hemispherical single-layer truss 18 is constructed has a circular fixed gantry 40 arranged at the center.
And a pair of fan-shaped moving gantry 42 symmetrically extending in the radial direction of the fixed gantry 40. Wheels 45 are provided at the lower portion of the support column 43 that supports the moving gantry 42. As a result, the movable gantry 42 is configured to rotate in the direction of arrow A about the fixed gantry 40 on the track 41 laid on the ground surface. The moving gantry 42 may be replaced by a crane or the like without laying the track 41.

The movable gantry 42 and the fixed gantry 4 as described above
Assemble the single-layer truss 18 on the zero. The single-layer truss 18 is assembled by blocking into a shape in which two fan shapes are joined at their acute corners. In this way, when the assembly of the blocked single-layer truss 18A is completed,
Only the fixed gantry 40 supports the central portion of the fan-shaped single-layer truss, the supporting state by the movable gantry 42 is released, and the movable gantry 4 is moved.
Rotate 2 to the next block. As described above, by using the movable moving gantry, it is possible to reduce the amount of temporary material and to construct the single-layer truss on the ground, so that it is possible to avoid the work in high places. The block-shaped single-layer truss 18 is supported only by the fixed gantry 40, but the fan-shaped single-layer truss 18A that is assembled in advance is designed to be formed by a slight deformation. There is no problem because it exists.

Next, a method for constructing the dome roof according to the fourth embodiment will be described. In the fourth embodiment, as shown in FIG.
A support portion 44 projects from the multi-layer truss 16 constructed on the upper part of the arena portion 14 to the outside of the building 12. The support portions 44 are arranged on the outer peripheral portion of the building 12 at predetermined intervals. In addition, the projecting portion of the multi-layer truss 16 and the support portion 44
Pulleys 46 and 48 are provided at the tip of the. A wire 50 wound around a winch 52 installed outside the building 12 is wound around the pulleys 46 and 48.
That is, the multi-layer truss 16 and the support portion 44 have the same function as the boom of the crane.

Here, the outer peripheral portion of the single-layer truss 18 constructed on the temporary gantry 24 is suspended by the wire 50. The winding force of the winch 52 is transmitted to the wire 50 via the pulleys 46 and 48. When the single-layer truss 18 is lifted up to a predetermined position, the single-layer truss 18 is joined to the inner peripheral portion of the multi-layer truss 16 to construct the dome roof 10.

As described above, by using the winch 52 installed outside the building 12 as a power source to suspend the single-layer truss 18 with a wire, the temporary construction pedestal 22 is annularly formed on the arena portion 14 as in the first embodiment. There is no need to arrange.

In the present embodiment, the member cross section of the multi-layer truss 16 is made large so as to withstand the load. Further, the support portion 44 added to the multi-layer truss 16 may be left as the main body structure even after the dome roof 10 is constructed.

[0033]

EFFECTS OF THE INVENTION Since the present invention has the above-described structure, when constructing a dome roof having a multi-layer truss on the outer periphery and a single-layer truss on the center, work man-hours and temporary costs are reduced, and work safety is reduced. Can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view showing a method for constructing a dome roof according to a first embodiment.

FIG. 2 is a cross-sectional view showing a method for constructing a dome roof according to the first embodiment.

FIG. 3 is a side view showing a state in which a multi-layer truss is constructed.

FIG. 4 is a plan view showing a method for constructing a dome roof according to a second embodiment.

FIG. 5 is a cross-sectional view showing an extruded state of a multi-layer truss in the method of constructing a dome roof according to the second example.

FIG. 6 is a plan view showing a method for constructing a dome roof according to a third embodiment.

FIG. 7 is a perspective view showing a fixed gantry and a movable gantry used in the method for constructing a dome roof according to the third embodiment.

FIG. 8 is a cross-sectional view showing a method for constructing a dome roof according to a fourth embodiment.

FIG. 9 is a plan view showing a dome roof constructed according to the present invention.

FIG. 10 is a cross-sectional view showing a dome roof constructed according to the present invention.

FIG. 11 is a sectional view showing a construction state of a conventional single-layer truss.

FIG. 12 is a sectional view showing a construction state of a conventional multi-layer truss.

[Explanation of symbols]

 16 Multi-layer truss 18 Single-layer truss 22 Temporary gantry 34 Track 36 Production yard 40 Solid gantry 42 Moving gantry 44 Bearing part 46 Pulley 48 Pulley 52 Winch (winding device)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Ishikawa 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (72) Inventor Hiromichi Yamada 8-21, Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Tomohisa Okuno 8-21-1, Ginza, Chuo-ku, Tokyo Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Kazuhiro Inoue Chuo-ku, Tokyo Ginza 8-21-1, Takenaka Corporation Tokyo Main Store (72) Inventor Toshiya Kashimura 8-21-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store (72) Inventor Matsuzaki Husuma Takenaka Kogyo Co., Ltd., 8-21-1, Ginza, Chuo-ku, Tokyo (72) Inventor Yasuhiko Suto Stockholder Takenaka Kogaku-East, 8-21, Ginza, Chuo-ku, Tokyo This store

Claims (4)

[Claims] 1. A multi-layer truss that constitutes a peripheral part of a dome roof and covers a space provided in a central portion of a building, and a multi-layer truss protruding from the upper part of the building toward the space and a central portion of the dome roof. In the method of constructing a dome roof constructed with a substantially hemispherical single-layer truss, which is constructed, lifted up and spanned over the space, and the outer periphery of which is joined to the inner periphery of the multi-layer truss, in the center of the building First step of arranging a temporary gantry in an annular shape on the ground surface of the section, second step of constructing the multi-layer truss while supporting the overhanging part by the temporary gantry, and constructing the single-layer truss on the ground surface And a third step of lifting up while guiding the outer peripheral portion thereof to the temporary gantry,
Lifting up the single-layer truss to a predetermined position and joining the inner peripheral portion of the multi-layer truss and the outer peripheral portion of the single-layer truss
A method for constructing a dome roof, comprising: 2. A multi-layer truss that forms a dome roof that covers the space provided in the center of the building, forms the outer periphery of the dome roof, and projects from the top of the building toward the space, and the center of the dome roof. In the method for constructing a dome roof, which is constructed, is lifted up, is bridged over the space, and the outer peripheral part is constructed with a substantially hemispherical single-layer truss joined to the inner peripheral part of the multi-layer truss, the upper part of the building A yard is provided on the circular track laid on the dome, and the multi-layer truss is divided into blocks on the manufacturing yard, assembled, and sequentially sent out on the track, and the block-shaped multi-layer truss is joined to form a dome. A method for constructing a dome roof, which comprises constructing an outer peripheral portion of the roof. 3. A dome roof covering a space provided in a central part of a building, constituting a peripheral part of the dome roof, and comprising a multi-layer truss protruding from the upper part of the building toward the space and a central part of the dome roof. In the method of constructing a dome roof constructed with a substantially hemispherical single-layer truss, which is constructed, lifted up and spanned over the space, and the outer periphery of which is joined to the inner periphery of the multi-layer truss, in the center of the building A circular fixed gantry is provided on the ground of the section, and a fan-shaped movable gantry that rotates around this fixed gantry is provided, and the single-layer truss is divided into blocks on the movable gantry, and then assembled. After the one-block single-layer truss is assembled and completed, the center of the assembled one-block single-layer truss is supported by a fixed gantry to rotate the moving gantry, and then move to the rotated gantry next. Assemble the single-layer truss of the block of A method for constructing a dome roof, characterized in that the blocks are joined together to form a central portion of a dome roof having a substantially hemispherical shape. 4. A dome roof covering a space provided in a central part of a building, constituting a peripheral part of the dome roof, and comprising a multi-layer truss protruding from the upper part of the building toward the space and a central part of the dome roof. In the method for constructing a dome roof, the dome roof is constructed with a substantially hemispherical single-layer truss, which is constructed, lifted up and bridged over the space, and the outer peripheral portion of which is joined to the inner peripheral portion of the multi-layer truss. Providing a support part that extends from the truss to the outside of the building, and installing a pulley on this support part and the extension part of the multi-layer truss, and winding the pulley through the pulley to the winder installed outside the building. A method for constructing a dome roof, characterized in that the single-layer truss constructed on the ground surface in the central part of the building is suspended by the wire.