JP2735707B2 - Dome construction method - 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 dome having a substantially spherical shape.

[0002] When constructing sports facilities, leisure facilities, event facilities, terminal buildings and the like with a dome-shaped structure, this type of construction method is adopted.

[0003]

2. Description of the Related Art A dome-shaped structure is a typical example of a facility that provides a large space for various events, sports, and the like, which have been increasing remarkably in recent years.

[0004] When constructing this structure, there are (a) a construction method using a space truss, (b) a construction method using an air film, and (c) a construction method using an RC shell.

[0005] However, the method of (a) requires a large amount of temporary materials such as scaffolds and the like, and there is a high risk of falling accidents due to many work at high places.

In the above method (b), it is necessary to constantly supply air to the inside after construction and to inflate the air film, so that maintenance is difficult and the room is easy to dry, so that dust is generated. Easy to dance.

In the method (c), since concrete is used, the weight increases and the ratio of the concrete work to the basic work increases, thereby increasing the work cost. In addition, it is necessary to attach a formwork and a shoring to cast concrete,
Since the construction period is prolonged, economy is poor.

In view of the above circumstances, Japanese Patent Laid-Open No.
Japanese Patent Laid-Open No. 220636 discloses a strach method.

The feature of this construction method is that a plurality of truss made of lower chords that can be shortened are arranged laterally at regular intervals, the lower chords of each truss are shortened, and the trusses are bent in an arc shape and built up in an arch shape. It is in.

According to this construction method, it is possible to reduce the construction cost and the construction period.

[0011]

However, the above-mentioned straching method is not suitable for constructing a dome other than the dome shape because the structure of the structure is limited to the dome shape due to its structural characteristics.

The present invention has been made in view of the above-mentioned conventional circumstances, and its object is to minimize temporary materials such as scaffolds,
It is still another object of the present invention to provide a dome construction method capable of performing work safely by reducing work at a high place, reducing construction cost and shortening the construction period.

[0013]

In order to achieve the above object, a method according to the present invention is configured as follows.

In the construction method according to the first invention, first, the upper chord material 10, the lower chord material 12, and the lattice material 14 are provided, and the ends are supported by rollers, and at least a part of the lower chord material 12 can be shortened in the axial direction. Many trusses 16 are assembled in a factory or the like.

Next, a pair of truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to be orthogonal (see FIG. 2).

Thereafter, the lower chord member 12 is shortened, each truss 16 is curved in an arc shape, and one or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a substantially spherical dome is constructed (see FIGS. 1B and 3).

In the method according to the second invention, the upper chord material 1
0, a lower chord material 12, and a lattice material 14, and a plurality of trusses 1 each of which is roller-supported so that an end thereof can move in a proximal direction.
6 is assembled in a factory or the like.

At least a part of the lower chord material 12 constituting the truss 16 can be shortened in the axial direction, and a tension cable 20 is slidably attached to the lower chord material 12.

Next, a pair of truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to be orthogonal (see FIG. 2).

Thereafter, the tension cable 20 is tensioned to shorten the lower chord material 12, the truss 16 is curved in an arc shape, and one or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a substantially spherical dome is constructed (see FIGS. 1B and 2).

In the construction method according to the third invention, the upper chord material 10
A large number of trusses 16 having a lower chord material 12 and a lattice material 14, the ends of which are roller-supported, and at least a part of the lower chord material 12 can be shortened in the axial direction, are assembled at a factory or the like.

Next, at least three truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to intersect (see FIG. 9).

Thereafter, the lower chord material 12 is shortened, each truss 16 is curved in an arc shape, and one or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a substantially dome-shaped dome is constructed (see FIGS. 1B, 12 and 13).

In the construction method according to the fourth invention, the upper chord material 1
0, a lower chord material 12, and a lattice material 14, and a plurality of trusses 1 each of which is roller-supported so that an end thereof can move in a proximal direction.
6 is assembled in a factory or the like.

The lower chord 12 constituting the truss 16 can be shortened at least partially in the axial direction, and a tension cable 20 is slidably attached to the lower chord 12.

Next, at least three truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to intersect (see FIG. 9).

Thereafter, the tension cable 20 is tensioned to shorten the lower chord member 12, and each truss 16 is curved in an arc shape, and one or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a dome having a substantially spherical shape is constructed (see FIGS. 1B, 12 and 13).

In the method according to the fifth invention, the upper chord material 1
0, a lower chord material 12, and a lattice material 14, and a plurality of trusses 1 each of which is roller-supported so that an end thereof can move in a proximal direction.
6 is assembled in a factory or the like.

The lower chord 12 constituting the truss 16 can be shortened at least partially in the axial direction, and a tension cable 20 is slidably attached to the lower chord 12.

Next, a pair of truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to be orthogonal (see FIG. 2).

Thereafter, the tension cable 20 is tensioned to shorten the lower chord material 12, each truss 16 is curved in an arc shape, and one or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a dome roof having a substantially spherical shape is constructed (see FIGS. 1B and 2).

The dome roof assembled in this way is
A dome is constructed by being installed on the upper part of a pre-constructed structure with a crane or the like.

In the construction method according to the sixth invention, the upper chord material 1
0, a lower chord material 12, and a lattice material 14, and a plurality of trusses 1 each of which is roller-supported so that an end thereof can move in a proximal direction.
6 is assembled in a factory or the like.

At least a part of the lower chord 12 constituting the truss 16 can be shortened in the axial direction, and a tension cable 20 is slidably attached to the lower chord 12.

Next, at least three truss groups 18 formed by arranging a plurality of these trusses 16 in parallel are arranged so as to intersect (see FIG. 9).

Thereafter, the tension cable 20 is tensioned to shorten the lower chord material 12, the trusses 16 are curved in an arc shape, and one end or both ends of the truss 16 are moved inward.

As a result, the central portion of the truss 16 is pushed upward, and a substantially dome-shaped dome roof is constructed (see FIGS. 1B, 12 and 13).

The dome roof assembled in this manner is
A dome is constructed by being installed on the upper part of a pre-constructed structure with a crane or the like.

[0044]

According to the present invention, the work of assembling the truss can be performed on the ground, so that the number of temporary materials such as scaffolds can be minimized, so that the work can be performed safely and easily.

After completion of the assembling work, the dome can be constructed by shortening the lower chord material and bending the truss into a bow shape, so that the construction is simple and the construction period can be shortened.

[0046]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 8 show a first embodiment.

FIG. 1 shows a truss 16 constituting the dome. Supports 22 are provided at both ends of the truss 16, and the supports 22 are roller-supported by guide rails 25 installed on a supporting ground.

A base plate 24 is provided at the end of the guide rail 25, and the column 22 movably supported by the guide rail 25 is supported by the base plate 24 when the construction work is completed.

As shown in FIG. 1 and FIG.
Is composed of an upper chord material 10, a lower chord material 12, and a lattice material 14. The configuration of the lower chord material 12 is different between the tip side 12a and the center side 12c and the middle side 12b.
The middle lower chord material 12b can be shortened in the axial direction.

That is, the lower chord material 12b on the middle side is shown in FIG.
As shown in FIG. 5, it is composed of an outer tube 26 and an inner tube 28,
One end of the inner pipe 28 is welded to one outer pipe 26 and the inner pipe 28
Is slidably connected to the other outer tube 26.

The interval 1 between the outer tubes 26, 26 is spaced as shown in the figure, so that the inner tube 28 is exposed.

As understood from FIG. 1A, a tension cable 20 is slidably inserted into the lower chord material 12.

One end of the tension cable 20 is fixed to the lower chord member 12c on the center side, and the other end is supported by a hydraulic jack 30 provided on the other column 22. Note that both ends of the tension cable 20 may be supported by hydraulic jacks 30 provided on the columns 22 on both sides.

A plurality of the trusses 16 assembled as described above are arranged in parallel to form a pair of truss groups 18 as shown in FIG.
Is formed.

These truss groups 18 are arranged perpendicularly so as to form a cross shape.

The assembling of the truss 16 and the like is carried out in a factory in principle for a transportable length, and the truss group 1
The connection of the eight is performed on site.

After that, the truss group 18 is laid, and small beams, braces, roof finishing materials and the like are attached (see FIG. 6).

Further, various installation work on the truss beam is performed, and at this time, the work of installing the piping, wiring, lighting equipment and the like can be performed.

The tension cable 20 is tensioned by the operation of the hydraulic jack 30.

When the tension cable 20 is pulled, the length of the lower chord member (intermediate side) 12b constituting each truss 16 is shortened, and the truss 16 is curved in an arc shape. At the same time, the column 22 at the tip of the truss 16 moves toward the center on the guide rail 25 and is supported by the base plate 24 with the pin.
(B), the central portion is pushed upward as shown in FIG.

Thereafter, as shown in FIG. 8, a corner portion (opening portion between the truss groups 18, 18) 32 is constructed.
A substantially spherical dome is constructed (see FIG. 3).

FIGS. 9 to 13 show the steps of the second embodiment.

In this embodiment, as shown in FIG. 9, three truss groups 18 each including a plurality of trusses 16 assembled as described above are arranged in parallel.

Thereafter, the truss group 18 is laid, and small beams, braces, roof finishing materials, and the like are attached.

Further, various types of installation work on the truss beams are performed, and at this time, piping, wiring work, installation work of lighting equipment and the like can be performed.

Then, the tension cable 20 is tensioned by the operation of the hydraulic jack 30.

When the tension cable 20 is pulled, the length of the lower chord member (intermediate side) 12b constituting each truss 16 is shortened, and the truss 16 is bent in an arc shape. At the same time, the column 22 at the tip of the truss 16 moves toward the center on the guide rail 25 and is supported by the base plate 24 with the pin.
(B), the central portion is pushed upward as shown in FIG.

Thereafter, as shown in FIG. 11, a corner portion (opening portion between the truss groups 18, 18) 32 is constructed, and a dome having a substantially spherical shape is constructed (see FIG. 12).

In the two embodiments described above, the struts 22 of each truss 16 constituting the truss group 18 are shown in FIG.
Are supported by rollers, but only one of the supports 22 at one end of one truss group 18 may be supported by pins, and the other supports 22 may be supported by rollers.

When each column 22,... Is supported in this manner, a line connecting the support points of the columns 22, 23 supported by pins becomes a reference axis, and the other columns 22,.
... will move.

In addition, the dome assembled in the above steps can be used as a roof.

That is, a dome roof (see FIGS. 3 and 12) which is constructed of reinforced concrete or the like and which has an open top is formed on a structure having an open top by using a crane or the like, thereby obtaining a substantially cylindrical dome. Can be constructed.

As described above, according to the present embodiment, the truss assembling work or most of the assembling work can be performed on the ground, so that temporary materials such as scaffolds are minimized, and the construction can be performed safely and easily. You.

Further, since the dome can be constructed only by tensioning the tension cable after attaching the roof material or the like, the construction is simple, the construction period can be shortened, and the cost of construction can be reduced.

[0076]

As described above, according to the present invention, the work of assembling the truss or most of the work of assembling can be performed on the ground, so that temporary materials such as scaffolds can be minimized, and construction can be performed safely and easily. It is possible to do.

Further, since the dome can be constructed simply by tensioning the tension cable after attaching the roof material or the like, the construction is simple, the construction period can be shortened, and the cost of construction can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a truss.

FIG. 2 is a plan view showing an example of the arrangement of a truss group in the first embodiment.

FIG. 3 is an overall configuration (outline) of a dome in the first embodiment.
FIG.

FIG. 4 is an enlarged view of a portion C in FIG. 1;

FIG. 5 is an enlarged view of a part D in FIG. 4;

FIG. 6 is a plan view (part 1) illustrating a dome building process in the first embodiment.

FIG. 7 is a plan view (part 2) illustrating a dome building process in the first embodiment.

FIG. 8 is a plan view (part 3) illustrating a dome building process in the first embodiment.

FIG. 9 is a plan view (part 1) illustrating a dome building process in a second embodiment.

FIG. 10 is a plan view (part 2) illustrating a dome building process in the second embodiment.

FIG. 11 is a plan view (part 3) illustrating a dome building process in the second embodiment.

FIG. 12 is a plan view showing the entire configuration of a dome according to a second embodiment.

FIG. 13 is a sectional view taken along line EE of FIG. 12;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Upper chord material 12 Lower chord material 14 Lattice material 16 Truss 18 Truss group 20 Tension cable 22 Strut 24 Base plate 25 Guide rail 26 Outer pipe 28 Inner pipe 30 Hydraulic jack 32 Corner part

Claims (6)

(57) [Claims] An upper chord material (10), a lower chord material (12),
And a plurality of trusses (16) having a lattice material (14), the ends of which are roller-supported, and at least a part of the lower chord material (12) can be shortened. A pair of trusses (18) formed side by side are arranged in a straight line, the lower chord (12) is shortened, each truss (16) is curved in an arc shape, and the end of the truss (16) is moved inward. By pushing up, the central part is pushed up, and a dome of a substantially missing ball shape is constructed,
Dome construction method characterized by the following. 2. An upper chord material (10), a lower chord material (12),
A lattice material (14), the end of which is roller-supported, at least a portion of the lower chord (12) can be shortened, and a tension cable (20) is slidably attached to the lower chord (12). Assembled multiple trusses (16),
A pair of trusses (18) formed by arranging a plurality of these trusses (16) in parallel are arranged in a straight line, and the tension cables (20) are tensioned to shorten the lower chord members (12) to thereby reduce the length of each truss (16). ) Is curved in an arc, and at the same time, the end of the truss (16) is moved inward, thereby pushing up the central portion and constructing a dome having a substantially spherical shape.
Dome construction method characterized by the following. 3. An upper chord (10), a lower chord (12),
And a plurality of trusses (16) having a lattice material (14), the ends of which are roller-supported, and at least a part of the lower chord material (12) can be shortened. At least three truss groups (18) formed side by side are arranged to intersect, and the lower chord material (12)
And by bending each truss (16) into an arcuate shape and moving the end of the truss (16) inwardly, the central portion is pushed upward to construct a dome having a substantially spherical shape. A characteristic dome construction method. 4. An upper chord material (10), a lower chord material (12),
And a lattice material (14), the end of which is roller-supported, at least a portion of the lower chord material (12) can be shortened, and a tension cable (20) is slidably attached to the lower chord material (12). Assembled multiple trusses (16),
At least three truss groups (18) formed by arranging a plurality of these trusses (16) in parallel are arranged so as to intersect,
Each truss (16) is bowed by tensioning the tension cable (20) and shortening the lower chord (12), while simultaneously moving the end of the truss (16) inward, thereby raising the center portion upward. Dome construction method characterized by constructing a dome with a substantially missing ball shape. 5. An upper chord material (10), a lower chord material (12),
And a lattice material (14), the end of which is roller-supported, at least a portion of the lower chord material (12) can be shortened, and a tension cable (20) is slidably attached to the lower chord material (12). Assembled multiple trusses (16),
A pair of trusses (18) formed by arranging a plurality of these trusses (16) in parallel are arranged in a straight line, and the tension cables (20) are tensioned to shorten the lower chord members (12), thereby reducing the number of trusses (16). ) Is curved in an arc, while simultaneously moving the end of the truss (16) inward, thereby pushing the central portion upward to form a substantially spherically shaped dome roof, and to the top of the pre-constructed structure. A dome construction method, wherein the dome roof is installed and a dome is constructed. 6. An upper chord material (10), a lower chord material (12),
A lattice material (14), the end of which is roller-supported, at least a portion of the lower chord (12) can be shortened, and a tension cable (20) is slidably attached to the lower chord (12). Assembled multiple trusses (16),
At least three truss groups (18) formed by arranging a plurality of these trusses (16) in parallel are arranged so as to intersect,
Each truss (16) is bowed by shortening the tensioning cable (20) and shortening the lower chord (12), while simultaneously moving the end of the truss (16) inward, thereby raising the center portion upward. A dome roof having a substantially spherical shape, and mounting the dome roof above a pre-constructed structure to build a dome.