JPH07310370A - Dome-shaped structure and construction method thereof - Google Patents

Abstract

PURPOSE:To maintain an effective space and provide a dome which can be constructed promptly and accurately. CONSTITUTION:The position of a vertex of a triangle-shaped precast concrete slab 20 where a shape steel frame 22 is buried in an outer peripheral area shaped up in specified dimensions, is fixed with a support surface 31 of a ring plate 30 fixedly laid out at a frame point position equivalent to an inscribed contact position of a dome circumscribed sphere by way of a fixture. Shape steel frames 22 are interconnected and fixed with each other by means of a joint tab mounted at a specified position of the shape steel frames 22 in such a fashion that they may be laid out in parallel near the shape steel frames.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dome-shaped structure and a method for constructing the dome-shaped structure, and more particularly, to a dome-shaped structure which uses a precast concrete plate for a panel forming a dome portion and can sufficiently secure an effective space therein. The present invention relates to a method for constructing a dome-shaped structure that is constructed quickly and accurately.

[0002]

2. Description of the Related Art As an example of a dome-shaped structure, a geodetic dome (geodetic dome) is known. This geodetic dome is a polygonal dome in which regular triangular basic panels are assembled so as to form a regular icosahedron inscribed in a spherical shape. Generally, in order to approximate the polygonal dome shape to a more spherical shape, the basic panel is subdivided into a larger number of triangles to construct a dome. As a conventional technique for easily constructing this basic panel, there is a method of constructing a dome-shaped structure described in Japanese Patent Publication No. 4-69259.

In this prior art, as shown in FIG. 19, a wooden triangular panel 100 manufactured in advance into a predetermined shape is assembled into a predetermined polygonal dome shape, and a dome constructed by the wooden triangular panel 100 is assembled. A precast concrete panel 120 in which a part of the lattice reinforcements 122 and structural reinforcements 121 is embedded in the surface plate 110 and which substantially matches the triangular shape of the wooden triangular panel 100.
(Hereinafter, referred to as a PCa panel) is connected and attached without a gap. Therefore, in this dome,
Two wooden triangle panel 100 and PCa panel 120
A layered dome-shaped structure is constructed. Further, from this state, concrete is placed on the lattice reinforcing bar 122 side of the PCa panel 120. At this time, a reinforcing net material (rib lath) 123 instead of a formwork is fixed to the surface of the lattice reinforcing bar 122. For this reason, it is possible to omit the formwork at the time of pouring concrete.

After the concrete is hardened, the wooden triangle panel 100 on the inner side is removed to construct a dome-shaped structure made of concrete panels.

[0005]

However, in the method of constructing the dome-shaped structure described above, in order to accurately connect the wooden triangular panels 100 to each other, the connecting plate 112 at the end is provided with a predetermined inclination angle α. Has become. Therefore, there is a problem that it is difficult to finish the end surface of each wooden triangular panel 100 into a predetermined shape. Further, in order to construct the entire dome, a plurality of types of work such as assembling the wooden triangular panel 100, attaching a PCa panel, and constructing cast-in-place concrete are required, and the cast-in-place concrete requires a curing period until a predetermined strength is exhibited. Because we have to secure
As a whole, there is a drawback that the merit of shortening the construction period cannot be fully utilized.

Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, to dispose a joining member having a predetermined inclined support surface at each panel apex position, and to form a PC of a predetermined shape.
It is an object of the present invention to provide a dome-shaped structure in which each PCa panel can be assembled with high precision by accurately holding the joining position by this joining member when assembling the a panel, and a method for constructing the dome structure.

[0007]

In order to achieve the above object, the present invention provides a triangular panel plate integrally formed with a peripheral frame on an outer peripheral portion thereof, and an aerial point corresponding to an inscribed contact position of a dome circumscribing sphere. A ring plate capable of supporting and fixing the corresponding vertices of the triangular panel plates, which are arranged and fixed in position at the inscribed contact position, at the inscribed contact position, are provided in a part of the peripheral frame, and are parallel to each other. And a joining tab for connecting and fixing the adjacent peripheral frames to each other.

Further, a shaped steel frame is embedded in the outer peripheral portion, and a triangular precast concrete plate having a predetermined size and shape is fixed and arranged at an aerial point position corresponding to the inscribed contact position of the dome circumscribing sphere, and the inscribed contact position is set. A ring plate capable of fixing the corresponding vertices of the triangular precast concrete plates assembled to the supporting surface at the inscribed contact point via a fixture and being attached in a predetermined position of the shaped steel frame to form a parallel shape. And a connecting tab for connecting and fixing the shaped steel frames arranged adjacent to each other to each other.

At this time, it is preferable that the ring plate has an inclined support surface composed of a fan-shaped portion having a central angle equal to an apex angle of corresponding apexes of the triangular precast concrete plates gathering at the inscribed contact position.

Further, the ring plate has an end portion connected to a support pipe, and the support pipe is fixed at a predetermined position through a support member constructed in the dome,
It is preferable to install and fix it at an imaginary point position forming the inscribed contact.

In order to construct the same structure as described above, a ring plate is arranged and fixed at a predetermined position on the frame, and then, is constructed in the dome at an aerial point position corresponding to the inscribed contact position of the dome circumscribing sphere. Another ring plate is arranged and fixed via a support member, and in this state, the triangular panel plate is suspended and connected so that each vertex of the triangular panel plate is fixed to the ring plate. The adjacent sides of the triangular panel plates are connected to each other through joining tabs provided on the peripheral frame formed on the outer periphery of the plate, and the predetermined triangular panel plates are sequentially assembled to construct a dome-shaped structure. It is characterized by having done.

In order to construct the same structure as described above, a ring plate is arranged and fixed at a predetermined position on the frame, and thereafter, it is constructed in the dome at an aerial point position corresponding to the inscribed contact position of the dome circumscribing sphere. Another ring plate is arranged and fixed through a supporting member, and a triangular precast concrete plate is suspended in this state, and each vertex of the triangular precast concrete plate is connected so as to be fixed to the ring plate. The adjacent sides of the triangular precast concrete plates are connected to each other through the joining tabs attached to the shaped steel frame formed on the outer periphery of the triangular precast concrete plates, and the predetermined triangular precast concrete plates are sequentially assembled. It is characterized by that.

[0013]

According to the present invention, the support surface of the ring plate is arranged and fixed with the apex position of the triangular panel plate having the peripheral frame formed on the outer peripheral portion at the aerial point position corresponding to the inscribed contact position of the dome circumscribing sphere. The panel plate is supported inside the dome by connecting the peripheral frames to each other with joint tabs that are attached to the peripheral frame at predetermined positions and are arranged in parallel and adjacent to each other. It is not necessary to dispose a steel truss frame or the like for this purpose, and therefore, the effective volume of the inner space portion formed by the dome can be made large. In addition, the strength as a three-dimensional frame can be sufficiently obtained by the composite structure of one panel plate and the frame constituting the periphery thereof.

According to the present invention, the apex position of the triangular precast concrete plate in which the shaped steel frame is embedded in the outer peripheral portion and has a predetermined size is arranged and fixed at the aerial point position corresponding to the inscribed contact position of the dome circumscribing sphere. The shaped steel frames are fixed to the supporting surface of the ring plate via fasteners, and the shaped steel frames are connected to each other by joining tabs that are attached to the shaped steel frames at predetermined positions and are arranged adjacent to each other in parallel. By fixing it, it is not necessary to arrange a steel frame truss frame or the like for supporting the precast concrete plate inside the dome, so that the effective volume of the inner empty part formed by the dome can be made large, and Due to the composite structure of precast concrete plate and shaped steel frame, the strength as a three-dimensional frame can be sufficiently obtained.

At this time, the ring plate has a surface supporting the triangular precast concrete plate as a fan-shaped portion having a central angle equal to the apex angle of corresponding vertices of the triangular precast concrete plates gathering at the inscribed contact points. With the inclined support surface, the triangular precast concrete boards can be connected and fixed with high accuracy.

Further, by connecting a support pipe to an end of the ring plate and fixing the support pipe at a predetermined position through a support member constructed in the dome, the ring plate can be accurately measured as described above. It can be installed and fixed at the imaginary point position that constitutes the inscribed contact.

Furthermore, by arranging and fixing the ring plate at a predetermined position on the frame on which the dome is installed by means of anchor bolts, a triangular precast concrete plate can be assembled on the frame with high accuracy.

In order to construct the same structure, a ring plate is arranged and fixed at a predetermined position on the body, and then, is constructed in the dome at an imaginary point position corresponding to the inscribed contact position of the dome circumscribing sphere. Another ring plate is arranged and fixed through a supporting member, and a triangular precast concrete plate is suspended in this state, and each vertex of the triangular precast concrete plate is connected so as to be fixed to the ring plate. The adjacent sides of the triangular precast concrete plates are connected to each other through the joining tabs attached to the shaped steel frame formed on the outer periphery of the triangular precast concrete plates, and the predetermined triangular precast concrete plates are sequentially assembled. By
A dome-shaped structure can be constructed accurately and quickly.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dome-shaped structure and its construction method according to the present invention will be described below with reference to the accompanying drawings. Figure 1
3 is a plan view (FIG. 1), a side view (FIG. 2) and a rear view (FIG. 3) showing a schematic structure of a geozetic dome 10 which is an embodiment of a dome-shaped structure according to the present invention.
First, the shape of the panel forming the geodetic dome 10 will be described. At this time, each vertex of the dome is inscribed in a sphere having a predetermined radius (hereinafter, this sphere is referred to as a dome circumscribing sphere). As is clear from the above-mentioned drawings, the geodetic dome 10 shown in this embodiment has an equator 11 (in this specification, the circumference of a horizontal great circle that divides the upper hemisphere and the lower hemisphere of the dome circumscribes the equator). The upper hemisphere portion above is not a complete hemisphere, but has a structure in which a part of the reinforced concrete building 12 constructed by being connected to a predetermined position on the side surface of the dome penetrates. For this reason, a part of the dome panel is cut out at the connecting portion 13 with the reinforced concrete building 12. And the odd-shaped panel 2 having a predetermined shape is formed in the cutout portion.
1 is attached. In the description of the present specification, the configuration of the irregularly shaped panel 21 will not be described in detail, but in the present embodiment, the irregularly shaped panel 21 has a standard shape panel which is originally assembled in a hemispherical shape and a dome that penetrates the dome. The coordinate values (X, Y, Z) of predetermined feature points are obtained by three-dimensional analysis by CAD based on the shape data of the joint portion 13 with the structure 12 constructed as described above. There is. As a result, it is possible to know the exact shape of the odd-shaped panel 21 used in the connecting portion 13, and it is possible to manufacture the odd-shaped panel 21 with high accuracy.

The geodetic dome 10 according to the present embodiment
Shows that a part of the regular icosahedron is configured with the area surrounded by the vertices indicated by the symbols A, B, and C in FIG. 1 as the basic triangular module 15 (in the figure, the vertex position is ● and the side Shown in bold). Further, the basic triangle module (ΔABC) 15 is divided into 16 plane triangles as shown in FIG. Each of the 16 flat triangular panels 20 shown in FIG. 4 has reference numerals 1, 2, 3A, 3B, 4,
This is a combination of five types of standard shape panels shown in FIG. The dome circumscribing sphere is formed by joining the sides and vertices of the flat triangular panel 20 of the standard shape toward the direction as shown in the drawing (the direction is schematically shown by an arrow on each panel). A convex polygonal basic triangular module (ΔABC) 15 inscribed in (not shown) can be constructed. The side length and apex angle of each flat triangular panel 20 can be accurately obtained by three-dimensional analysis by CAD, and the apex (contact point with the dome circumscribing sphere) coordinate values of the flat triangular panel 20 at that time should also be obtained in the same manner. You can The display coordinate system is a rectangular coordinate system (X, Y, Z), a cylindrical coordinate system (ρ, φ, Z) or a polar coordinate system (r, θ,
It is also preferable to manage each contact point coordinate with a coordinate system that can be represented by φ) and is easy to determine the position by surveying at the site.

Although the geometrical shape of the geodetic dome 10 has been described above, the actual plane triangular panel 20 has each of the plane triangles 5 formed by the vertices a0, b0, c0 shown as an example in FIG. As shown in FIG. 5, each of the vertices is surrounded by a position that is inside by a distance d, and its vertices are indicated by symbols a, b, and c.
As a result, a gap of about 2d is formed between the sides of the triangular panels arranged adjacent to each other.

The structure of the five types of triangular panels having the panel shapes and dimensions set as described above and the details of the joints between the triangular panels will be described with reference to FIGS. 6 to 9. FIG. 6 is a schematic plan view showing an example of the reinforcing structure of the flat triangular panel 20. As shown in the figure, the outer periphery of the flat triangular panel 20 is surrounded by an outer peripheral frame 22 produced by welding and joining channel steels. As shown, the gusset plate 23 having a substantially trapezoidal shape is welded and joined to each side at three locations. Further, the joint ribs 24 having a predetermined length are welded to the gusset plate 23, and the mesh ribs 25 that substantially match the shape of the flat triangular panel 20 are arranged so as to be supported by the joint ribs 24. In this embodiment, D10
A welded wire mesh bar in which mm rebars are welded in a grid pattern with a pitch of 150 mm is used. As shown in FIG. 7, only one layer of the mesh bar 25 is arranged at the central position of the panel thickness, but the diameter of the bar, the bar pitch, and the number of bar steps are determined depending on the size of the panel and the bending stress generated. It goes without saying that the above can be appropriately determined.

In the factory, the flat triangular panel 20 is assembled in a reinforcing structure as shown in FIG. 6 and then placed in a formwork, and after being placed in concrete, has a predetermined strength by a predetermined curing method. Finished as a PCa panel. At this time, since the outer dimensions of the reinforcing structure are finished with high accuracy by the outer peripheral frame 22, PCa
The quality of the finished product as a panel is extremely high.

The construction of the joint portion when assembling the PCa panel manufactured in the factory in this way on site is shown in FIGS.
Will be described with reference to. A joining tab 26 is welded and joined to the lower surface of the outer peripheral frame 22 at a substantially central position on each side.
Since the joining tabs 26 are positioned so as to form a straight line on the lower surface of the outer peripheral frame 22 when the flat triangular panel 20 is arranged at a predetermined position, they are sandwiched by the splicing plates 27 as shown in FIG. And high tension bolt 28
It will be firmly bolted by.

A joint plate 29 is welded to the outer surface (upper surface) of the outer peripheral frame 22 where the joint tab 26 is attached. This ensures that the adjacent outer peripheral frames 22 are joined together. As shown in FIG. 8, the joining plate 29 is formed by adjoining the flat triangular panels 2 adjacent to each other.
The joint plate 29 is bent at an angle equal to the angle 0, and the joint plate 29 is applied to the outer surface of the flange of the grooved steel forming the outer peripheral frame 22, and the periphery of the plate 29 is fillet-welded. In the dome portion within a predetermined distance from the passage position in the dome, it is necessary to form a fireproof coating structure by spraying a fireproof material R such as rock wool on the outer surface of the joining plate 29. In this embodiment, in consideration of this, the notch is formed so that the facing position of the outer peripheral frame 22 which is the joint portion is thinner than the panel thickness, and the joint plate 29 is accommodated in a part of the notch portion. Refractory material R so as to cover the surface of the joining plate 29
It is possible to prevent a convex portion from being formed on the panel surface even when the above is applied. In addition, as shown in FIG. 7B, the size of the outer peripheral frame 22 is set in consideration of the thickness of the plate to which the joining plate 29 is attached, in the portion where the fireproof coating structure is not required, and the portion shown in FIG. Such notches can be omitted.

On the other hand, a ring plate 30 serving as a contact point (hereinafter referred to as a contact point in the meaning of the inner contact point of the dome circumscribing sphere) is arranged at the joint point where the vertices of each flat triangular panel 20 gather. As shown in FIGS. 10 and 14, the ring plate 30 has apexes (5 or 6) of the flat triangular panel 20 over the entire circumference.
There are a type of supporting and joining and a type of supporting and joining the vertices of the three flat triangular panels 20. As shown in FIG. 9, a surface of the ring plate 30 which supports the apex of the flat triangular panel 20 has a predetermined inclination angle, and the apex of the predetermined flat triangular panel 20 is aligned with the inclined support surface 31. It can be arranged and bolted through the mounting holes 32. As a result, the vertices of the flat triangular panel 20 gathering at one contact point of the dome can be accurately connected and fixed. At this time, the ring plate 30 arranged at each contact position is accurately arranged on the imaginary point coordinates calculated in advance.

Here, the aforementioned two types of ring plates 3
The configuration of 0 will be described with reference to FIGS.
FIG. 10 shows a steel ring plate 30 of a type in which the apex of the flat triangular panel 20 is supported and fixed on the entire circumference of the inclined support surface 31. As shown in the figure, the inclined support surface 31
Is formed on the surface of the cap-shaped body 34 to which the fan-shaped pieces 33 forming the angles α1 to α6 that are equal to the apex angle of the apex of the supporting flat triangular panel 20 are welded and joined. Since the sum of the angles α1 to α6 of each fan-shaped piece 33 is 360 ° or less in this shade-shaped body 34, when the fan-shaped pieces 33 are joined together, a flat pyramidal inclined surface as shown in FIG. 12 is formed. Will be
The fan-shaped piece 3 that is joined to form the shade 34
3 is referred to as a fan-shaped portion 33 to mean a part). Each sector 3
A mounting hole 32 is formed at a predetermined position on the bisector of the central angle of the mounting plate 3, and the mounting hole 32 is a flat triangular panel 20.
When the respective vertices are arranged so as to be aligned with the center of the inclined support surface 31, they coincide with the bolt holes (not shown) provided at the predetermined positions of the outer peripheral frame 22 of the flat triangular panel 20. The flat triangular panel 20 can be accurately installed by bolting this portion. Since the central angle of the fan-shaped portion of the inclined support surface 31 varies depending on the type of the flat triangular panel 20 that gathers at the contact points as described above, the ring plate 30 having four types of inclined support surfaces 31 is manufactured in this embodiment. (Indicated by a circle in FIGS. 2 and 3). Further, the vertex angles of the vertices of the basic triangle module 15 are 71.
Since it is 206 °, and five apexes are gathered at the contact point, the inclined support surface 31 at this contact point has five fan-shaped portions forming α = 71.206 ° as shown in FIG. 33 (denoted by ● in FIGS. 2 and 3).

On the lower surface of the cap-shaped body 34, as shown in FIGS.
As shown in FIG. 2, the steel pipe 35 is fixed and supported by the steel pipe 35. A flange plate 36 is fixed to the other end of the steel pipe 35, and the ring plate 30 is connected to a pipe support 37 (details will be described later) via the flange plate 36, and the pipe support 37 is fixed to a predetermined position. The ring plate 30 is fixed to a supporting member so that the position of the ring plate 30 is fixed to a predetermined imaginary point coordinate position.

FIG. 14 shows an example of a ring plate installed at the equator 11 position of the geodetic dome 10 of this embodiment. This ring plate 40 (hereinafter,
It is referred to as a half ring plate 40. ) Shows that the half-hatched body 41 is directly welded to the base plate 42 as shown in the figure, and the base plate 42 is placed at a predetermined position on the leg portion which has already been constructed via three anchor bolts (not shown). It is supposed to be fixed. FIG. 15 is a front view showing a fan-shaped portion 44 forming the central angles β1 to β3 of the inclined support surface 43. The half ring plate 40 is for height adjustment at a predetermined position of the frame as shown in FIG. It is installed via the floor mortar 45, and is firmly fixed to the skeleton concrete 50 by the anchor bolts 46. Also,
A mortar 47 for filling is applied to a gap formed after the flat triangular panel 20 is installed.

Next, a modified example of the ring plate 30 will be described with reference to FIGS. The ring plate 30 shown in FIG. 16 has a cap-shaped body 34 on which an inclined support surface 31 equivalent to that of the ring plate 30 shown in FIGS. 10 and 13 is formed, and a connecting plate 38 is formed on the lower surface thereof. ing. The connecting plate 38 is formed by welding and joining two plates in parallel with each other with a predetermined gap (see FIG. 7B), and the tip plate 73a of the vertical support 73 is inserted into this gap. 73a and the connection plate 39 can be connected by a connection bolt 39 while maintaining a predetermined angle.

As a result, when connecting the flat triangular panels 20 as shown in FIG. 17, by adjusting and fixing the connection angle with the vertical support 73, each ring plate 30 is fixed.
The angle between the position and the inclined support surface 31 can be accurately set. At this time, a temporary connecting beam 74 is erected between the vertical supports 73, and the horizontal displacement due to the weight of the panel transmitted from the ring plate 30 or the wind load at the time of temporary installation and the vertical supports 7
It is preferable that the buckling of No. 3 can be prevented.

FIG. 18 shows a method of constructing the whole dome by connecting the entire flat triangular panels 20 and then constructing the ceiling plate 75. As shown in FIG.
If a ring plate 30 of the type shown in 6 is used,
The ring plate 30 can be used as a hanging point on the ceiling of the hanging structure in the interior work after the dome is completed. Connecting the ceiling suspension rod 76 to the connection plate 38 of the ring plate 30, and further connecting the suspension metal fitting 77 of the ceiling plate 75 to the lower end of the ceiling suspension rod 76 while adjusting the position so that the ceiling plate 75 keeps horizontal. Thus, the ceiling board 75 can be easily constructed.

Next, a method for constructing a dome-shaped structure according to the present invention will be described with reference to FIGS. In this embodiment, as shown in the sectional view of FIG. 20, an internal dome D having a space truss structure further having a centering beam is constructed inside the geodetic dome 10. However, the inner dome D is a structure having a completely independent structure from the geodetic dome 10 according to the present invention, and although it is shown in the accompanying drawings, its structure will not be directly described herein.

The geodetic dome 10 according to the present embodiment
Then, as shown in FIG. 20, the side surface of the dome and the equator 11
The skeleton concrete has already been constructed in the lower part, and the dome part is constructed on this skeleton concrete. Hereinafter, the procedure for constructing the dome-shaped structure according to the present invention will be described based on the work flow chart shown in FIG. First, the lower portion of the dome equator 11 is constructed by cast-in-place concrete using a predetermined trapezoidal form (step 110). At this time, the skeleton concrete inside the dome is
It is preferable to divide and construct in advance the scaffolding range of the supporting structure 70 assembled in the dome. Next, the supporting structure 70 is assembled in the space inside the dome, and the half ring plate 40 is installed at a predetermined position on the top end of the body of the lower part of the equator 11 that has already been constructed (step 120,
130). The first-stage flat triangular panel 20 (PCa panel) arranged on the equator 11 is carried into the site and temporarily placed at a predetermined position on the site (step 140). Further, a contact point position corresponding to the apex position of the first-stage flat triangular panel 20,
That is, the installation position of the ring plate 40 is determined by surveying (step 150). In this survey, a laser transit 60 that can confirm a predetermined verticality is installed at the dome center reference point, and a predetermined level (height) on this center vertical line is set.
Installed a light wave range finder 61 on the floor of
The predetermined contact coordinates at the position where the index 62 of the staff or the like is erected are obtained by 1.

Next, the ring plate 4 is placed at the position of the survey point.
The ring plate 40 is attached and fixed so that the center point of the inclined support surface 43 of 0 comes. At this time, ring plate 4
Since the pipe support 37 is attached to 0 as described above, the position of the ring plate 40 located at the tip of the pipe support 37 can be secured by fixing the pipe support 37 to the support member. . In this state, two adjacent first upward-facing flat triangular panels 2
0 is hung in a predetermined position and temporarily fixed to the ring plate 40, the downward facing first stage flat triangular panel 20 is hung between them, and the joining tabs 26 are attached to the outer peripheral frame 22 by using the attachment plate 27. Are connected in a temporarily assembled state. Thereafter, the first-stage flat triangular panel 20 is sequentially temporarily assembled over the entire circumference. At this time, the predetermined odd-shaped panel 21 is also assembled by the same connecting method (step 170). An outer scaffold 65 for work is provided on the outside of the flat triangular panel 20 in accordance with the temporary assembly of the flat triangular panel 20.
Are installed (step 180). The bracket portion 66 of the outer scaffold 65 can be tilted as shown in FIG. 21, and the scaffold plate 67 and the handrail 68 can be turned horizontally and vertically regardless of the inclination angle of the flat triangular panel 20. The angle of the bracket portion can be adjusted by expanding and contracting the buckle 69.

When the flat triangular panels 20 having a predetermined number of stages are temporarily assembled, the contact coordinates of the flat triangular panels 20 are set to the light wave range finder 61 and the horizontal collimator (level) 64.
To check the installation status. If necessary, the camber 71 and the position adjusting turnbuckle 72 are used to adjust the position, and the joining bolts of the joining tab 26 and the ring plate 40 are finally tightened (step 19).
0, 200). Further, the joining plate 29 is welded to a predetermined position of the outer peripheral frame 22 to fix each flat triangular panel 20 (step 210). By the above procedure, the work of joining the flat triangular panels 20 in each stage is performed to proceed with the construction of the entire dome. When the joining work of the flat triangular panel 20 is completed over the entire dome, the support work inside the dome is disassembled (step 220).

Next, mortar is filled in a predetermined position between the panels, and the joint is waterproofed (step 23).
0, 240). In addition, as described above, in the range where the fireproof coating is required, the fireproof coating work using a predetermined refractory material is performed. Further, in this embodiment, a subdivided aluminum outer plate (not shown) is further attached as a decorative plate to the outer surface of the flat triangular panel 20 made of a PCa panel (step 250). The outer scaffold is disassembled when the attachment of the decorative plate is completed (step 260).

Next, the erection posts 80 are erected on the outer surface of the already assembled flat triangular panel 20, and the tension rods 81 erected from the erection posts 80 support the next flat triangular panel 20. A modification in which the supporting work inside the dome can be omitted will be described with reference to FIG. The drawing shows a flat triangular panel 20 in which a joining plate (not shown) and a ring plate 30 have already been welded and finally tightened, and the outer surface of the flat triangular panel 20 has a latitude line (hereinafter, It is equipped with a trolley 85 which can travel along a circumferential line that forms a horizontal line perpendicular to the meridian. Further, an erection post 80 is erected on the trolley 85 in a direction coinciding with the normal line direction of the dome. In this embodiment, the erection post 80 is made of a steel pipe pipe lattice structure, can support a sufficient vertical load, is set to have a large bending rigidity, and is provided with a support line 83 to assist self-standing. In this way, the erection posts 80 can be moved in the latitudinal direction by the traveling of the trolley 85 to the position where the flat triangular panel 20 is suspended. Therefore, the number of the erection posts 80 can be reduced, and the erection posts 80 can be assembled. There is an advantage that the temporary structure becomes compact.

An upper end 81a of a tension rod 81 is fixedly supported on the erection post 80. Furthermore, this tension rod 8
The lower end 81b of No. 1 is connected to the tip of the next flat triangular panel 20. The flat triangular panel 20 can be supported in a cantilever manner with the ring plate 30A as a fulcrum. In this state, the joint position is measured using a light wave distance measuring device, and the length of the turnbuckle 82 mounted at the intermediate position of the tension rod 81 is adjusted to position the joint coordinates. At this position, the ring plate 30A can be fully tightened, and the outer peripheral frames of the adjacent flat triangular panels 20 can be fixed by the joining plate (not shown).

FIG. 23 is a schematic view of construction showing a joining work state of the flat triangular panel 20. In order to assemble the flat triangular panel 20 as shown in the figure, the flat triangular panel 20B facing upward is arranged and joined along the entire circumference along the upper side of the flat triangular panel 20A portion one step lower, which has already been completely joined. After that, the downward-facing flat triangular panel 20C is fitted between the upward-facing flat triangular panels 20B and assembled. At this time, the upward-facing flat triangular panel 2
The ring plate 30B is fixed to the upper end apex 20a of 0B, and the lower end apices 20b and 20c are fixed to the ring plate 30A. This ring plate 30A
Is accurately positioned, and this ring plate 30
Each flat triangular panel 20 supported by A is securely held at the joint point position. When the downward-facing flat triangular panel 20C is suspended in this state, the flat triangular panel 2
0C is the joint plate 2 with the ring plates 30A and 30B.
It is guided by 9 and to an almost exact position. Then, the flat triangular panel 20 is temporarily fixed with a camber or the like (not shown), the position is corrected by remeasurement, the bolts are fully tightened at the positions of the ring plates 30A and 30B, the main welding of the joining plates is carried out, and then sequentially. Assemble the flat triangular panel 20. The above panel joining procedure is shown in FIG.
Needless to say, the present invention can be applied to any of the case of using the dome support structure 70 and the case of using the erection post 80 shown in FIG.

In the above description, the method of constructing the dome has been described with reference to the example of constructing the geodetic dome, but it goes without saying that the method of construction can be applied to a dome of another structural type. Also, when the flat triangular panel 20 is made of a heavy precast concrete board, the size of the member becomes large,
The erection post 80 may be fixed and supported by a pin support or the like in the vicinity of the joining point of the flat triangular panel 20. In this case, at the time of assembling the flat triangular panel 20, an outer peripheral truss is provided around the entire circumference of the dome at the panel assembling position, and safety during temporary installation is ensured.

Further, as the panel material constituting the flat triangular panel, in addition to the above-mentioned precast concrete board,
Materials such as wooden plywood, cloth (canvas), synthetic resin molded plate, and steel plate can be used as long as the peripheral frame is formed while maintaining a predetermined plate rigidity. In addition,
When joining the panel material made of steel plates to form the above-mentioned dome, it is preferable to provide a splicing plate on one of the outer peripheral frames of the panel plates and to join adjacent sides by welding. In this case, there is an advantage that additional waterproofing work can be omitted in the entire contact portion.

[0043]

As is apparent from the above description, according to the present invention, it is possible to construct a dome-shaped structure having a large effective space quickly and accurately.

[Brief description of drawings]

FIG. 1 is a plan view showing a construction example of a geodetic dome which is an example of a dome-shaped structure according to the present invention.

FIG. 2 is a side view of the dome-shaped structure shown in FIG.

FIG. 3 is a rear view of the dome-shaped structure shown in FIG.

FIG. 4 is a panel division view schematically showing an example of panel division of a basic triangle module.

FIG. 5 is an explanatory view showing an example of dimensions of a flat triangular panel.

FIG. 6 is an explanatory view showing an example of a reinforcing structure of a flat triangular panel.

FIG. 7 is a sectional view schematically showing the sectional structure of a flat triangular panel.

FIG. 8 is an enlarged cross-sectional view showing a joint portion of a flat triangular panel.

FIG. 9 is an enlarged cross-sectional view showing a joined state of the vertex positions of the flat triangular panel.

FIG. 10 is a schematic perspective view showing an entire all-round support type ring plate.

11 is a plan view showing the shape of an inclined support surface of the ring plate shown in FIG.

12 is a partial end face and a partial sectional view represented by a partial end face line and a partial sectional line of xii-xii in FIG.

FIG. 13 is a schematic perspective view showing the entire ring plate of the all-round support type (for the basic triangle module apex).

FIG. 14 is a schematic perspective view showing an entire half ring plate.

15 is a front view showing an installation example of the half ring plate shown in FIG.

FIG. 16 is a partial cross-sectional view showing a modification of the ring plate by cutting out a part thereof.

17 is a partial cross-sectional view showing an example in which a flat triangular panel is assembled using the ring plate shown in FIG.

FIG. 18 is a partial cross-sectional view showing an example in which the ring plate shown in FIG. 16 is used as a suspension point when constructing a ceiling plate.

FIG. 19 is a work flowchart showing a construction procedure of a method for constructing a dome-shaped structure according to the present invention.

FIG. 20 is a construction outline diagram showing one construction stage when constructing a dome-shaped structure.

FIG. 21 is a construction outline view showing an example of a fixed state of the ring plate and a fixed state of the outer scaffold.

FIG. 22 is a construction outline view of a method for constructing a dome-shaped structure in which a flat triangular panel is joined using an erection post.

FIG. 23 is a construction outline view showing an example of a procedure for joining flat triangular panels.

FIG. 24 is a partial cross-sectional view showing an example of a conventional method for constructing a dome-shaped structure.

[Explanation of symbols]

 10 Geodetic Dome 15 Basic Triangular Module 20 Flat Triangular Panel 22 Perimeter Frame 25 Mesh Strand 26 Joining Tab 29 Joining Plate 30, 40 Ring Plate 31, 43 Inclined Supporting Surface 37 Pipe Support 70 Dome Support 73 Vertical Support

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Yaskawa 146-17 Higashi Kibogaoka, Asahi-ku, Yokohama-shi, Kanagawa Cosmo Kibogaoka 508

Claims (7)

[Claims] 1. A triangular panel plate integrally formed with a peripheral frame on an outer peripheral portion thereof, and a fixed and fixed position at an aerial point corresponding to an inscribed contact position of a dome circumscribing sphere, and gathering at the inscribed contact position. A joint for connecting and fixing the corresponding vertices of the triangular panel plate to a ring plate capable of supporting at the inscribed contact position and the peripheral frames that are provided in a part of the peripheral frame and are arranged in parallel and adjacent to each other. A dome-shaped structure having a tab. 2. A triangular precast concrete plate in which a shaped steel frame is embedded in an outer peripheral portion and which has a predetermined dimension and shape,
The corresponding apex of the triangular precast concrete plates, which are arranged and fixed at the imaginary point position corresponding to the inscribed contact position of the dome circumscribing sphere, and the corresponding vertices of the triangular precast concrete plates gathered at the inscribed contact position, are fixed to the supporting surface of the inscribed contact position by a fastener. A ring plate that can be fixed through the shape steel frame, and a joining tab that is attached to a predetermined position of the shape steel frame and that connects and fixes the shape steel frames that are adjacently arranged in parallel to each other. Dome structure. 3. The ring plate has an inclined support surface composed of a fan-shaped portion having a central angle equal to the apex angle of the corresponding apexes of the triangular precast concrete plates gathering at the inscribed contact position. The dome-shaped structure according to claim 1 or 2. 4. The ring plate has an end connected to a support pipe, and the support pipe is fixed at a predetermined position via a support member constructed in the dome to form the inscribed contact. The dome-shaped structure according to claim 1 or 2, wherein the dome-shaped structure is fixedly installed at an aerial point position. 5. The dome-shaped structure according to claim 3, wherein the ring plate includes a ring plate which is arranged and fixed by an anchor bolt at a predetermined position on a frame on which the dome is installed. 6. A ring plate is arranged and fixed at a predetermined position on the frame, and then, at another imaginary point position corresponding to the inscribed contact position of the dome circumscribing sphere, another ring is provided through a support member constructed in the dome. The plates are arranged and fixed, and in this state, the triangular panel plate is suspended and connected so that each apex of the triangular panel plate is fixed to the ring plate, and the peripheral frame formed on the outer periphery of the triangular panel plate. The dome-shaped structure is characterized in that the adjacent sides of the triangular panel plates are connected to each other through the joining tabs provided on the assembly, and the predetermined triangular panel plates are sequentially assembled to construct a dome-shaped structure. How to build things. 7. A ring plate is arranged and fixed at a predetermined position on the frame, and then at another imaginary point position corresponding to the inscribed contact position of the dome circumscribing sphere, another ring is inserted through a supporting member constructed in the dome. The plate is arranged and fixed, and the triangular precast concrete plate is suspended in this state, and each vertex of the triangular precast concrete plate is connected so as to be fixed to the ring plate, and further formed on the outer periphery of the triangular precast concrete plate. The adjacent sides of the triangular precast concrete plates are connected to each other through the joining tabs attached to the shaped steel frame, and the predetermined triangular precast concrete plates are sequentially assembled to construct a dome-shaped structure. And a method for constructing a dome-shaped structure.