JP2981061B2 - How to build a cable 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 cable dome roof defining a space for a stadium, for example.

[0002]

2. Description of the Related Art Conventionally, a compression ring and a tension ring inside the compression ring, and a plurality of ridge cables arranged between the compression ring and the tension ring on a plurality of circumferences extending in the circumferential direction and connecting the two rings. A post having an upper end connected to the inner end of each ridge cable; a lower end of the compression ring and the outermost post; and a post adjacent to the upper end of the outer post and the inside of the post. When constructing the roof of a cable dome having a diagonal cable connected to the lower end of the post, the tension ring is above the post to connect the outer end of each of the other ridge cables and the lower end of the post. (JP-A-63-226427).

[0003]

By the way, in the completed cable dome, the tension acting on the innermost (innermost) ridge cable is smaller than the tension acting on the outermost ridge cable. Therefore, the innermost ridge cable is designed to be thin, and the outermost (outermost) ridge cable is designed to be thick. However, in the conventional method,
Since the height position of the tension ring is higher than the post and the other ridge cable is connected to the post, excessive tension acts on the innermost ridge cable. For this reason, the innermost ridge cable is set to have a thickness larger than a design value so as to withstand the excessive tension. However, in the completed cable dome, the innermost ridge cable does not need to have a strength to withstand such a large tension. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for constructing a cable dome roof without preparing an innermost ridge cable having a thickness to withstand excessive tension.

[0004]

According to the present invention, there is provided a compression ring and a tension ring provided inside the compression ring, and a plurality of circumferentially extending peripheries extending between the compression ring and the tension ring. A plurality of ridge cables, a post having an upper end connected to the inner end of each ridge cable, a lower end of the compression ring and the outermost post, and an upper end of the outer post and an upper end of the post. A method for constructing a roof of a cable dome comprising: a diagonal cable connected to a lower end of a post adjacent inward, wherein a diagonal cable of each circumference is sequentially arranged from an outermost circumference to an innermost circumference. The connection of the diagonal cable, the tension ring,
This is performed while maintaining the roof of the cable dome at a height below the upper end of each circumferential post in a completed state. The innermost ridge cable may be previously set to an excessively long length and may be movable relative to the tension ring.

[0005]

According to the present invention, the connection of the diagonal cable is performed while maintaining the tension ring at a height lower than the upper end of the post inside the roof of the cable dome in the completed state. As a result, the innermost ridge cable can be prevented from being in a horizontal state where an infinite tensile force acts on the innermost ridge cable. It is possible to avoid the application of excessive tension exceeding the size required when the dome is completed. Therefore, it is not necessary to prepare the innermost ridge cable having an unnecessarily large thickness and thus a heavy weight. At this time, a large tension acts on the outermost ridge cable, but this is within a range of the magnitude of the tension acting on the outermost ridge cable when completed.

When the tension ring is raised by setting the innermost ridge cable in advance to have an excessively long dimension and making it relatively movable in the length direction of the cable with respect to the tension ring, The innermost ridge cable can be made to hang down instead of being in a horizontal state where an infinite tensile force acts on it in theory. This allows
It is possible to avoid an accident of cutting the innermost ridge cable when constructing the cable dome.

[0007]

1, there is shown in plan view a roof 12 of a cable dome 10 constructed in accordance with the present invention. The roof 12 includes a compression ring 14 having a circular shape or a regular polygonal shape as shown, and a compression ring 1.
4 includes a regular polygonal or circular tension ring 16 inside the space defined by
Have centers on the same vertical line. The illustrated compression ring 14 is formed of reinforced concrete, steel frame reinforced concrete, steel frame, or the like. Compression ring 1
4 is supported on the ground by a support structure 18 including a plurality of columns and beams. Also, in the illustrated example, as shown in FIG. 9, which is a longitudinal cross-sectional view of the roof 12 constructed in accordance with the present invention, another of the same shape is provided below the tension ring 16.
One tension ring 20 is arranged, and both tension rings are connected to each other.

[0008] A plurality of ridge cables 22 connecting the rings 14 and 16 are arranged between the compression ring 14 and the tension ring 16. In the illustrated example, three hoop cables 24 are arranged between the compression ring 14 and the tension ring 16 so as to surround the plumb line in a triple manner, and the compression ring 14 and the outermost (outermost) hoop cable 24 are disposed. Between the two hoop cables 24, and between the innermost (innermost) hoop cable 24 and the tension ring 1.
6, a plurality of ridge cables 22 are arranged and connected to each hoop cable 24 together with the cables to form an isosceles triangle.

Further, as shown in FIG. 9, the inner end of each ridge cable 22 (the end on the side of the tension ring 16).
A post 26 having an upper end connected to the lower end of the compression ring 14 and the outermost post 26, and an upper end of the outer post 26 and a lower end of the post 26 adjacent to the inside of the post, respectively. A diagonal cable 28 is connected. The ridge cable 22, post 26 and diagonal cable 28 connected together define a triangle. The tension rings 16, 20, the ridge cable 22, the hoop cable 24, the post 26 and the diagonal cable 28 have a predetermined tension when their interconnection is completed, ie when the triangle shown in FIG. 9 is completed. be introduced.

FIGS. 2 to 9 show a roof 1 of a cable dome 10.
2 is shown in order. 2 to 8 show the roof 1
The cross-sectional shape when the second skeleton is completed, that is, the cross-sectional shape shown in FIG. 9 is indicated by a chain line. Referring to FIG.
At the center of the previously formed compression ring 14, a temporary mast 30 extending along the vertical line is installed. The ridge cables 22 are connected to each other on the ground, and one end of the temporary cable 32 is attached to the compression ring 14. Further, the innermost ridge cable 22 is connected to the tension ring 16 so as to be relatively displaceable. Only the innermost ridge cable 22 is set to an excessive length exceeding a predetermined size when the roof 12 is assembled. The other end of the temporary cable 32 is connected to the outer end of the outermost ridge cable 22, and the tension rings 16, 20 through which the temporary mast 30 penetrates are raised slightly along the temporary mast using the temporary mast 30. . Thereafter, the temporary cable 32 is pulled, and the outer end of the outermost ridge cable 22 is connected to the compression ring 14. Next, the upper end of the post 26 is connected to the inner end of each ridge cable 22, and the innermost and outermost hoop cables 24 are connected.
To the ridge cable 22 and the temporary cable 3
The connection destination of No. 2 is changed to the lower end of the outermost post 26.

Next, as shown in FIG. 3, the tension ring 16 is raised along the temporary mast 30. The lifting of the tension ring 16 stops at a height position lower than the upper end of the outermost post 26, preferably at a height position between the upper and lower ends of the post 26, as viewed in a state where the roof 12 is shown by the chain line assembled. While maintaining the tension ring 16 at this height, the diagonal cable 28 connects the compression ring 14 and the lower end of each outermost post 26. These connections are made by passing the lower end of the post 26 from the compression ring 14 via the temporary cable 32 and connecting both ends of the diagonal cable 28 prepared in advance to the lower end of the post 26 and the compression ring 14.
This is done by connecting to The connection of the diagonal cable 28 forms the triangle (FIG. 4).

During the connection of the diagonal cable 28, when the height position of the tension ring 16 is maintained at a level lower than the upper end of the post 26, as compared with the case where the height position is maintained at the same level as or higher than the upper end of the post 26. Therefore, the magnitude of the tension acting on the innermost ridge cable 22 is small. This eliminates the need for cables that are unnecessarily large in diameter for the construction of the roof 12 and therefore withstand high tensions in excess of the tension needed to maintain the roof 12. Prior to the connection of the diagonal cable 28, the hoop cable 24 of the second circumference is moved from the outer circumference to the inner circumference.
Place.

Next, the diagonal cable 28 is connected in the second and third rounds. The diagonal cable 28 in each circumference is connected to the post 2 of the circumference inward from the circumference.
6 and the lower end of, and is connected to the upper end of the post 26 outward from said circumference.

FIG. 5 shows the connection operation in the second round.
As shown in FIG.
4 and the tension ring 16 is raised to a height between the upper and lower ends of the post when the roof 12 is completed. Before the tension ring 16 is raised, the innermost diagonal cable 28 is connected to the upper ends of the innermost posts 26 and the tension ring 20 in a slack state. While maintaining the tension ring 16 at the above-mentioned height position, the temporary cable 34 is swung outward, and the upper end of the outer post 26 connected to the outer end of the ridge cable 22 and the upper end of the outer post 26 adjacent to the post. The lower end of the post 26 located inside (inner circumference) is connected by a diagonal cable 28 prepared for the second circumference (see FIG. 6).

Also during the connection operation in the third round, the tension ring 16 is maintained at a height position between the upper and lower ends of the post 26 indicated by a chain line, and during this time, the temporary cable 34 is pulled and the diagonal cable 28 is used. A connection is made between the upper end of the post 26 in the second round and the lower end of the post 26 in the third round. In the example shown in the figure, the cables 22 and 28 and the post 2
6 are located at the innermost circumference (fourth circumference) of both cables 22,
28 and post 26 interconnection.

Next, the tension ring 16 is raised preferably until the height position thereof becomes the same height position as the upper end of the post 26 on the third circumference (FIG. 7), and the tension ring 16 on the innermost circumference is temporarily fixed. And the tension ring 16
The length is adjusted so as to be exactly the same as the design length, and the connection is made (FIG. 8). At this time, the ridge cable 22 is slightly hung or slightly taut. When the innermost ridge cable 22 is connected, the innermost diagonal cable 28 is slightly tensioned, and the weight of the tension ring 16 is temporarily received by the diagonal cable 28. Thereafter, the innermost diagonal cable is tensioned to the designed tension. As a result, tension as designed is introduced into each cable, the tension ring 20 moves away from the temporary mast 30 and rises a predetermined distance, and the framework of the roof 12 is completed. The temporary mast 30 is then dismantled and removed.

[Brief description of the drawings]

FIG. 1 is a plan view of the roof of a cable dome constructed in accordance with the present invention.

FIG. 2 is a longitudinal sectional view of a ridge cable, a post, a diagonal cable, and the like in a state where the cable is pulled up into the air.

FIG. 3 is a longitudinal sectional view showing a state in which a tension ring is raised to attach a diagonal cable on an outermost periphery.

FIG. 4 is a longitudinal sectional view showing a state where a tension ring is raised to attach a diagonal cable of a second circumference.

FIG. 5 is a longitudinal sectional view showing a state where a tension ring is raised to attach a diagonal cable of a third circumference.

FIG. 6 is a longitudinal sectional view showing a state in which a temporary cable is attached to a lower end of a third circumference post.

FIG. 7 is a longitudinal sectional view showing a state in which a tension ring is raised to attach a diagonal cable at an innermost circumference.

FIG. 8 is a longitudinal sectional view showing a state where the innermost ridge cable is adjusted to a predetermined length and connected.

FIG. 9 is a sectional view of a completed roof.

[Explanation of symbols]

 10 Cable Dome 12 Roof 14 Compression Ring 16 Tension Ring 22 Ridge Cable 24 Hoop Cable 26 Post 28 Diagonal Cable

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ identification code FI E04G 21/16 E04G 21/16 (58) Investigated field (Int.Cl. ⁶ , DB name) E04B 1/32 102 E04B 1 / 34 E04B 7/08 E04G 21/14 E04G 21/16

Claims (2)

(57) [Claims] 1. A compression ring and a tension ring inside the compression ring, a plurality of ridge cables between the compression ring and the tension ring, the ridge cables being arranged on a plurality of circumferences extending in the circumferential direction and connecting both rings, A post having an upper end connected to the inner end of the ridge cable, a lower end of each of the outermost posts and the compression ring, and an upper end of each of the outer posts and a lower end of a post adjacent to the inside of the post; A method of constructing a roof of a cable dome having diagonal cables connected to the diagonal cables, respectively, comprising sequentially connecting diagonal cables of each circumference from an outermost circumference to an innermost circumference, Connection of the diagonal cable,
A method for constructing a roof of a cable dome, wherein the tension ring is maintained at a height below the upper end of each circumferential post in a state where the roof of the cable dome is completed. 2. The method according to claim 1, wherein the innermost ridge cable is previously set to an oversized length and is movable relative to the tension ring.