JP3039457B2 - How to build a large 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 large dome-shaped or ring-shaped roof, and more particularly to a method for constructing a frame, and can be used, for example, for constructing a large roof of a stadium or an event hall. .

[0002]

2. Description of the Related Art Heretofore, as a typical construction method for constructing a dome-shaped or ring-shaped large roof frame, there are the following methods.

(1) Temporary receiving vent (shoring) method First, assembling the shoring and receiving the load with the shoring,
Assemble the large roof frame member (steel frame member or wood member). After the entire framework is assembled, the support is removed to establish the framework.

(2) Lift-up method, push-up method A large roof frame member is laid and lifted to a predetermined height by lift-up using a lifting device or push-up using a push-up device. Release the push-up mechanism.

[0005]

In the case of the temporary venting method, where the feet are unstable (for example, in a dome construction of an existing stadium or the like, the existing structure and the ground surface inside the dome are subjected to the load of the shoring work. It is not possible to receive enough)), you must provide high support,
There is a problem that work on the lower part cannot be performed until the erection is completed and the support is released and dismantled.

On the other hand, in the case of the lift-up method or the push-up method, there are problems that a large-scale apparatus is required and management during lifting is complicated. In addition, in order to form the ground as low as possible, a panta dome construction method, a leg slide construction method, or the like may be adopted, but a more complicated mechanism is required. Further, there is a problem that the work on the lower part cannot be started until the lift-up or the push-up mechanism is disassembled after the entire work is completed, and the ground is difficult if there is a stand or the like at the lower part.

The present invention has been made to solve the above-mentioned problems in the prior art, and provides a rational method for constructing a large roof which is excellent in economy and workability without any or almost no support work. It is intended to be.

[0008]

According to the method for constructing a large roof of the present invention, a method for constructing a dome-shaped or ring-shaped large roof skeleton includes: (a) a step of constructing a tension ring on an outer peripheral portion; ) A step of constructing a compression ring inside the tension ring, (c) a step of structurally self-supporting a ring-shaped portion sandwiched between the tension ring and the compression ring, (d) a frame member of the large roof (E) constructing a new compression ring inside the compression ring, and shifting the function of the compression ring to a new internal compression ring; c) repeating the steps of (e) to (e) the required number of times.

[0009] The frame member mentioned here is not limited to a single member, but includes a truss-like member or a number of other members formed as a main girder or a beam. Further, the material of the tension ring, the compression ring, and other skeleton members is not particularly limited, such as a member made of a steel member, a member made of a wooden member, and a member made of a composite material.

Even in the case of the conventional temporary receiving vent method, as shown in FIG. 3, the tension ring 1 is provided on the outer side of the dome or ring-shaped large roof, and the compression ring is provided on the inner side (inner side). 2 and the predetermined tension and compression are applied by the support or the release of the support mechanism, whereby the structure is established.

In the present invention, a tension ring is provided on the outer peripheral side. The compression ring plays a role corresponding to the compression ring in accordance with the progress of construction.
By sequentially shifting to the inner members, it is possible for the completed part to be established as a structure at any point during the construction, and large structures can be provided without supporting structures or special support mechanisms. The roof can be constructed.

If the lower structure has sufficient rigidity and the main beam in the radial direction can be supported as a cantilever, it is possible to perform the construction without any support, but the rigidity of the lower structure is low. If it is not enough, simple support works are used until the effect of the first compression ring is obtained.

According to a second aspect of the present invention, in the method for constructing a large roof according to the first aspect, the frame member is supported by the support until the first compression ring is completed inside the tension ring, and the first compression ring is completed. The rest is the case where the shoring is removed, and the shoring is substantially self-supported only by the frame member including the tension ring and the compression ring.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention in which a large dome-shaped roof is constructed in a ring shape from the bottom so as to gradually widen the ring width. It is a thing.

FIG. 1A shows a state in which a primary compression ring 2a, which is the first compression ring, is constructed inside the tension ring 1, and the tension ring 1, the primary compression ring 2a and the main in the radial direction are shown. The girders 3 are structurally complete as a ring-shaped structure.

FIG. 1 (b) shows a state where the main girder 3 is added and the secondary compression ring 2b is constructed inside the primary compression ring 2a, and the function of the compression ring is 2 from the primary compression ring 2a. The process moves to the next compression ring 2b, and tension (tensile force) acts on the primary compression ring 2a.

Hereinafter, similarly, in FIGS. 1 (c) to 1 (f),
The function of the compression ring is shifted to the inside of the third compression ring 2c, the fourth compression ring 2d, the fifth compression ring 2e, and the sixth compression ring 2f. As shown in Fig. 1 (g), a dome-shaped large roof frame is completed.

FIG. 2 shows a vertical cross section in the middle of construction. As the construction progresses, the function of the compression ring is changed to the primary compression ring 2a, the secondary compression ring 2b, and the tertiary compression ring 2c.
And move on to the upper ring.

In the drawing, reference numeral 4 denotes a support for supporting the primary compression ring 2a until the first effect as a compression ring is obtained. The primary compression ring 2a functions as a compression ring, and When the space between the ring 1 and the ring 1 is structurally completed, the ring 1 can be removed.

[0020]

According to the construction method of the present invention, it is possible to assemble the framework of a large roof without a shoring or even when a shoring is used, only by using a low shoring at an outer peripheral portion in an initial stage. It is very advantageous in terms of economy and construction period.

Further, when a large roof is hung over an existing competition facility or the like, construction that does not affect existing facilities such as a ground or a stand can be performed.

In the case of new construction, parallel work can be performed at the lower part except immediately under construction of members, and the construction period can be further shortened.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a construction procedure of a dome roof frame according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a state during construction of a dome roof frame according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a general relationship between a tension ring and a compression ring.

[Explanation of symbols]

1 ... tension ring, 2 ... compression ring,
2a ... primary compression ring, 2b ... secondary compression ring, 2c ... tertiary compression ring, 2d ... quaternary compression ring, 2e ... 5th compression ring, 2f ... 6th compression ring, 3 ... main girder, 4 ... support Engineering

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Agawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Fuminori Otake 6-3-2 Toyo, Koto-ku, Tokyo Kashima Construction Co., Ltd. Kanto Branch (72) Naoya Sasaki, Inventor 6-3-2 Toyo, Koto-ku, Tokyo Kashima Construction Co., Ltd. Kanto Branch (72) Inventor, Haruji Tsubota 2-191-1, Tobita-Shi, Chofu Kajima Corporation Technical Research Institute (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 1/32 102 E04B 7/08

Claims (2)

(57) [Claims] When constructing a dome-shaped or ring-shaped large roof frame, a step of: (a) constructing a tension ring on an outer peripheral portion; and (b) a step of constructing a compression ring inside the tension ring. (C) a step of structurally self-supporting a ring-shaped portion sandwiched between the tension ring and the compression ring, (d) a step of adding a framework member of a large roof inside the compression ring, (e) Constructing a new compression ring inside the compression ring, transferring the function of the compression ring to a new compression ring inside; and (f) repeating the steps (c) to (e) as many times as necessary. A method for constructing a large roof, comprising: 2. The framing member is supported by a shoring until the first compression ring is completed inside the tension ring, and after the first compression ring is completed, the shoring is removed and the tension ring is substantially removed. The method for constructing a large roof according to claim 1, wherein the large roof is self-supported only by a frame member including a compression ring.