JPH0469260B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method of constructing a dome roof, particularly a dome roof used in a large-scale building.

<Conventional technology> A typical method of constructing a dome roof as described above is to install a temporary support in the center of the building, and after assembling the roof structure section into several parts concentrically from the center of the dome roof. A construction method is known in which the materials are lifted up one after another and installed on temporary supports one after another.

<Problems to be Solved by the Invention> However, in the case of the construction method using temporary supports as described above, until the dome roof assembly is completed and the periphery of the dome roof is completely fixed to the outer roof foundation, During this period, the entire weight of the roof structure continues to be concentrated on these temporary supports, so it is necessary to use temporary supports that are quite large and have a considerable supporting capacity, as they will be dismantled after the dome roof is completed. For this reason, especially in the case of large dome roofs,
There is a problem in that it takes a lot of effort to assemble, install, and even dismantle the temporary supports, which makes the construction of the dome roof complicated and expensive.

<Means for Solving the Problems> The dome roof construction method of the first invention of this application includes a dome roof foundation in which both ends of a V-shaped roof beam member on the open leg side are provided at the outer edge of the dome roof. After repeating the work of fastening the dome along the base of the dome roof, attach a similar V to the tops of two adjacent roof beam members.
The process of joining both ends of the open leg side of the letter-shaped roof beam member and connecting these joints or two adjacent points at the top of the roof beam member with appropriate beam materials is repeated in the circumferential direction and toward the center of the dome roof. The gist is to construct a roof beam having a triangular roof structure in a dome roof installation space.

A method for constructing a dome roof according to a second invention of this application is a V-shaped roof beam member used in the first invention, in which two beam members are joined at one end with a large number of joints. This is a construction method that uses metal fittings to join together. Here, "beam material"
"roof beam member" refers to a structural member such as laminated timber that constitutes a dome roof, and "roof beam member" refers to a unit frame in which two of the beam members are joined in a V-shape through a joining means such as a joining fitting.

In the second aspect of the invention, the number of beams to be finally jointed collectively using the joining fittings is determined by the number of fixing points to be fastened to the dome roof foundation and the intervals at which these fixing points are installed. are different, and the number of joints of the joining metal fittings used to join these beam materials is also different. The specific number of such joints is as follows:
As shown in the examples, about 5 to 6 pieces are common.

<Function> By adopting a construction method in which the roof beams are constructed sequentially from the dome roof foundation toward the center of the dome roof, as in the above method, most of the support for the already installed roof beam members is borne by the dome roof foundation. be able to. Therefore, supporting the roof structure during construction becomes extremely simple, and there is no need to provide large temporary supports as in the conventional construction method.

<Example> Hereinafter, a construction method according to an example of the present invention will be explained in detail with reference to the accompanying drawings.

Example 1 First, as shown in Figure 1A, the work is to fasten both ends of the V-shaped roof beam member 2 on the open leg side with metal fittings to the inside of the dome roof foundation 1 with a diameter of approximately 37 m. Repeat sequentially with intervals in the direction. As this V-shaped roof beam member 2, for example, FIGS.
As shown in the diagram, two wooden beams 3 with a length of about 10 m, such as laminated wood, which are manufactured by curving to match the curvature of the dome roof, are used to form the spherical surface of the dome roof. It is sufficient to use one made by joining the beam members 3 in a V-shape using a metal joining fitting 4 having six joining hands 5. That is,
In the illustrated example, this joining fitting 4 is constructed by combining iron plates in a hexagonal shape and welding each face of a hexahedron as joining surfaces 4a, and by fixing joint hands 5 to the joining surfaces 4a, respectively. On the other hand, a bolt 5c is welded and fixed to the inside of the joint 5,
Further, a connecting plate 5b is fixed between the bolts 5c by welding, and the bolts 5c are attached to the joint surface by nuts 5a located inside the joint fitting 4. Then, adjacent 2 of the joining metal fittings 4
If the end faces of the beam members 3 are opposed to the two joint surfaces 4a, and the connecting plates 5b and bolts 5c are housed in recesses formed on the upper and lower surfaces of the ends of the beam members,
By bolting the four joints 5 on the top, bottom, left and right sides of the beam ends to the beam ends and fully tightening the bolts 5c inside the joint fittings, the beam ends are pressed against the joint surface 4a. (In this press-contact state, the connecting plate 5b or bolt 5c does not come into contact with the joint surface 4a, but faces each other with an appropriate space). In this way, the two beam members 3 are fixed to the joining metal fittings 4, and the V-shaped roof beam member 2
is made. In addition, in this embodiment, the roof beam member 2
A small beam member 17 is attached in advance between the two beam members, but it goes without saying that such a small beam member 17 may be installed in the final step of constructing the roof beam.

V-shaped roof beam member 2 to dome roof foundation 1
After finishing the fixing, as shown in Fig. 1B, a roof is formed by connecting two beams in a V-shape to the dome roof foundation 1 between the roof beam members 2 using similar joining metal fittings. Fasten the beam member 8. and,
A beam material 9 is joined between the dome roof foundation 1 and the joining metal fitting 4 at the head of this roof beam member 8, and the beam materials 10 are sequentially joined between the joining metal fittings at the top of the roof beam members 2 and 8. do. Here, in the above and the following explanations, when joining the open leg side end of the beam material or roof beam member to the joint of the joint metal fitting at the head of the roof beam member, the joint that comes on the lower side in the state of use is It is fixed in advance to the joining metal fittings by bolting and temporarily attached as an integral part, and after finishing bolting of the end of the beam material etc. by the lower jointer, the bolts and nuts are fully tightened inside the joining metal fittings, and then Use the procedure of fixing the upper joint to the joint metal fittings and beam material, and then final tightening the bolt portion that comes out from the bolt hole on the upper side of the joint metal fittings to the inside of the joint metal fittings using a nut.

Figures 2C and 2D show the dome roof foundation part (portion A in Figure 1B) after the above steps have been completed; in this illustrated example, the joining metal fittings fixed to the dome roof foundation 1 6 has two joint surfaces 7a connected in a V-shape. A jointer 7 is temporarily attached to each of these joint surfaces 7a in advance, and the end surfaces of the beam members of the roof beam members 2 and 8 are brought into contact with these joint surfaces 7a, and the jointer is attached to the ends of these beam members. Once the bolts are attached, fully tighten the bolt part that sticks out inside the joining metal fittings with the nut.
The beam ends of the roof beam members 2 and 8 are fastened to the dome roof base 1.

After completing the construction of the outermost roof beam member in this way, as shown in Fig. 1C, attach the fitting to the top of the adjacent roof beam member 2 in the same manner as this member 2. Both ends of the V-shaped roof beam member 11 on the open leg side are sequentially joined, and a beam member 12 is inserted between the top of the roof beam member 11 and the top of the roof beam member 2, as shown in FIG. 1D. The joining process is repeated sequentially in the circumferential direction of the dome roof. Next, the adjacent 2 at the top of the roof beam member 11
Connect these points sequentially in the circumferential direction with beams 14 (first
Figure E). After that, a similar V-shaped roof beam member 15 is joined between the tops of the adjacent roof beam members 11 (FIG. 1F), and then the joint fitting on the top of this roof beam member 15 and the outside By sequentially joining the beam members 16 to the joining fittings at the top of the roof beam member 11 as shown in FIG. 1G, a roof beam having a triangular roof structure is constructed in the dome roof installation space ( Figure 1 H, I).

Figures 3A and 3B show how the small beams 17 are installed when the above construction process is completed, and the ends of the small beams 17 installed between the roof beam members and the beams are It is bolted and fixed by a metal fitting 18.

Embodiment 2 FIG. 4A shows a completed view of a roof beam with a diameter of about 37 m constructed by the construction method of the second embodiment of the present invention. This embodiment is constructed using joining metal fittings 21 and 22 having five joining surfaces and a joining fitting 23 having six joining surfaces. Then, a V-shaped roof beam member 24 is formed by using joining metal fittings 22 or 23 on the joining metal fittings 21 fixed at intervals along the dome roof foundation 1.
After joining the open leg side ends of the roof beam members 24 and joining the beam members 25 between the two ends, the roof beam members 24
Both ends of a similar V-shaped roof beam member 26 on the open leg side are joined to the top of the roof beam member 2.
A beam material 27 is joined between the top of the roof beam member 6 and the top of the middle roof beam member 24, and beam materials 28 are joined to two adjacent locations on the top of the roof beam member 26. Thereafter, the V-shaped roof beam member 29 is joined to the top of the roof beam member 26, and the beam material 30 is joined between the tops of the roof beam members 29 and 26, thereby completing the construction of the roof beam shown in the drawing.

Incidentally, in the above embodiment, the dome roof beam is constructed by joining and combining wooden beams approximately 10 m in length and curved with a curvature corresponding to the shape of the dome roof using metal joining fittings. By adopting such a construction method, it is possible to create a dome roof with the following two features. First, when designing the dome, the rise of the dome can be freely selected within a wide range, and a dome roof with a particularly low rise can be manufactured. In other words, in conventional construction methods that combine steel frame materials, the rise is limited to approximately 0.25 times the dome diameter, and if it is less than that, the dome roof's own weight, wind pressure or snow load applied to the dome roof after installation It was difficult to construct a dome roof with a low rise because the dome roof could collapse. On the other hand, in the case of the construction method of the present invention, it is possible to reduce the rise of the dome roof to about 0.15 to 0.18 times the dome diameter, thereby making it possible to construct a flat dome roof. Also, for the same reason, the second feature is the length 10 as mentioned above.
The dome diameter (diameter) is approximately
One example is that it becomes possible to construct a dome roof as large as 400 m (with conventional construction methods, the dome diameter is 150 m).
(The limit was about m).

Example 3 FIG. 4B shows a roof beam with a diameter of about 106 m constructed by the construction method of the third example of the present invention.
In this Example 3, except for the dome roof foundation,
It is constructed using a joining metal fitting 31 having six joining surfaces. First, both ends of the V-shaped roof beam members 32 and 33 on the open leg side, which are formed by joining two beam members together using the joining metal fittings 31, are sequentially fastened to the dome roof base 1, respectively. Also, a beam member 34 is provided between the top of the roof beam member 33 and the dome roof foundation.
join. Thereafter, both ends of a similar V-shaped roof beam member 35 on the open leg side are attached to the roof beam members 32, 33.
At the same time, beam members 38 are respectively connected between the tops of the roof beam members 32 or between these tops and the tops of the roof beam members 33. Then, the illustrated dome roof beam is constructed by repeating the same or similar procedure as above from the dome roof base side toward the center of the dome roof.

<Effects of the Invention> According to the dome roof construction method of the present invention configured as described above, both ends of the V-shaped roof beam member on the open leg side are attached to the dome roof foundation provided at the outer edge of the dome roof. After repeating the fastening work sequentially along the dome roof base, both ends of the open leg side of a similar V-shaped roof beam member are joined to the tops of two adjacent roof beam members, and this joint or the roof A roof beam having a triangular roof structure is constructed in the dome roof installation space by repeating the process of connecting two adjacent points of the top of the beam member with the beam material in the circumferential direction and the center direction of the dome roof. Therefore, most of the support for the roof beam members that have already been installed can be placed on the dome roof foundation, and supporting the roof structure during construction is extremely simple. There is no need to provide temporary supports, and the dome roof can be constructed easily and quickly. That is, since the V-shaped roof beam members can be made in advance on the ground, there is no need to assemble them one by one in the air. Therefore, the amount of work in the air is reduced, and the temporary scaffolding used when assembling the dome can be simplified, leading to shorter construction periods and lower costs. Furthermore, by using lightweight wooden beams, it is possible to construct a dome roof with a smaller rise and larger dome diameter than with conventional construction methods. Also, 2
A dome roof foundation in which both ends of the open leg side of a V-shaped roof beam member obtained by joining one end of a main beam member to each other using a joining metal fitting having a large number of joints are attached to the outer edge of the dome roof. After repeating the fastening work sequentially along the dome roof foundation, both ends of the open leg side of a similar V-shaped roof beam member are joined to the tops of two adjacent roof beam members, and this joint or By repeating the process of connecting two adjacent points of the top of the roof beam member with beam materials in the circumferential direction and center direction of the dome roof, a roof beam having a triangular roof structure is constructed in the dome roof installation space. With this structure, all the beam materials are pulled and joined together by the jointing member toward the joining metal fittings, and this tensile force can transmit the rotational moment in the strong axis direction that occurs at the upper and lower ends of the beam materials. The materials are rigidly jointed to each other by a joining fitting. As a result, when assembling the dome, the so-called beam material can be brought in by the joiner of the joining metal fittings, and a large and highly accurate dome frame can be assembled.

Further, by using roof beam members and beam materials that are curved according to the curvature of the dome roof, a curved dome roof can be assembled.

[Brief explanation of drawings]

1A to 1H are process explanatory diagrams of a construction method according to an embodiment of the present invention, FIG. 1I is a cross-sectional view taken along the - line in FIG. 1H, and FIG. 2A is a plan view of a roof beam member used in the embodiment. FIG. 2B is a side view, FIG. 2C is a plan view showing how the roof beam member is attached to the dome roof foundation, FIG. 2D is an explanatory view of FIG. Figure A is an enlarged view of the part in Figure 1 I, Figure 3 B is a plan view of the part in Figure 3 A, and Figures 4 A and B are plan views of dome roofs constructed using other construction methods. . 1...Dome roof foundation, 2, 8, 11, 1
5, 24, 26, 29, 32, 33, 35... Roof beam member, 3, 9, 10, 12, 14, 16, 2
5, 27, 28, 30, 34, 37, 38...beam material, 4, 6, 21, 22, 23, 31...joining metal fittings.

Claims (1)

[Claims] 1. After repeating the work of fastening both ends of the V-shaped roof beam member on the open leg side to the dome roof foundation provided at the outer edge of the dome roof in sequence along the dome roof foundation, Similar Vs at the tops of the two roof beam members
By repeating the process of joining both ends of the open leg side of the letter-shaped roof beam member and connecting these joints or two adjacent places at the top of the roof beam member with beam materials in the circumferential direction of the dome roof and toward the center, A dome roof construction method characterized by constructing roof beams having a triangular roof structure in a dome roof installation space. 2. The construction method according to claim 1, characterized in that roof beam members and beam materials are curved according to the curvature of the dome roof. 3. A dome roof in which both ends of the open leg side of a V-shaped roof beam member obtained by joining one end of two beam members to each other with a joining metal fitting having a large number of joints are attached to the outer edge of the dome roof. After repeating the work of fastening to the foundation sequentially along the dome roof foundation, connect both ends of the open leg side of the similar V-shaped roof beam members to the joining metal fittings on the tops of two adjacent roof beam members. In addition, by repeating this process of connecting two adjacent points of the joint or the top of the roof beam member with the beam material in the circumferential direction and center direction of the dome roof, the roof beam with the triangular roof structure can be installed in the dome roof installation space. A method of constructing a dome roof. 4. The construction method according to claim 3, characterized in that roof beam members and beam materials are curved according to the curvature of the dome roof.