JP3046124B2 - Truss manufacturing method and dome construction method using truss - 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 of manufacturing an arched truss and a method of constructing a dome using the arched truss.

[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.
As shown in Japanese Patent Publication No. 220636, a plurality of truss made of a lower chord that can be shortened are arranged laterally at regular intervals, and the lower chord of each truss is shortened to bend the truss into an arc shape, thereby building up the arch. A construction method has been proposed, and according to this construction method, it is possible to reduce the construction cost and shorten the construction period.

[0009]

However, in the above-mentioned method, since the struts are rigidly joined to both ends of the truss, it is difficult to keep the height of the truss at the time of ground construction below a certain level. It is necessary to perform the installation work and the work of installing small beams, braces, roofing materials, etc. between the trusses at high places.

[0010] For this reason, it takes time and effort to transport the material, which not only increases the cost and lengthens the construction period, but also
It is difficult to ensure work safety. Therefore, it was not suitable for constructing a structure having a high effective ceiling height.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a first object of the present invention is to make it possible to carry out installation work safely and easily by reducing work at a high place, to reduce manufacturing costs and to reduce work costs. An object of the present invention is to provide a method of manufacturing a truss capable of reducing time.

A second object of the present invention is to minimize the number of temporary materials such as scaffolds, and to perform work safely and easily by reducing work at high places, thereby reducing the cost of construction and the time required for construction. It is an object of the present invention to provide a dome construction method capable of shortening the dome and easily constructing a dome having a high effective ceiling height.

[0013]

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

In the manufacturing method according to the first invention, first, a truss 16 having an upper chord material 10, a lower chord material 12, and a lattice material 14 is assembled at a factory or the like. At least a part of the lower chord material 12 constituting the truss 16 can be shortened by a predetermined length in the axial direction.

Next, the assembled truss 16 is placed at a predetermined position, and the columns 18, 1 placed in a lying state are placed.
8 is pin-joined to both ends of the truss 16.

Thereafter, the truss 16 is lifted upward by the hoist 22, and the lower ends of the columns 18 are moved inward to build up both columns 18, 18. Then, the lower end of each column 18 is supported on the foundation, and the upper end of each column 18 and the truss 16 are fixed.

Furthermore, the lower chord material 12 is shortened, and the truss 16
The arcuate truss is formed by bending the central part upward by bending the central part upward.

In the manufacturing method according to the second invention, first, a truss 16 having an upper chord material 10, a lower chord material 12, and a lattice material 14 is assembled at a factory or the like.

The lower chord member 12 constituting the truss 16 can be shortened at least partially by a predetermined length in the axial direction.
A tension cable 20 is slidably attached to the lower chord material 12.

Next, the assembled truss 16 is placed at a predetermined position, and the columns 18, 1 placed in a lying state are placed.
8 is pin-joined to both ends of the truss 16.

Thereafter, the truss 16 is lifted upward by the hoist 22 and the lower ends of the columns 18 are moved inward to build up both columns 18, 18. Then, the lower end of each column 18 is supported on the foundation, and the upper end of each column 18 and the truss 16 are fixed.

Further, the truss 16 is curved in an arc shape by pushing the tension cable 20 to shorten the lower chord material 12, thereby pushing up the center portion to form an arch-shaped truss.

In the manufacturing method according to the third invention, first, a truss 16 having an upper chord material 10, a lower chord material 12, and a lattice material 14 is assembled at a factory or the like.

The lower chord material 12 constituting the truss 16 can be shortened at least partially by a predetermined length in the axial direction.

Next, the assembled truss 16 is placed at a predetermined position, and the columns 18, 1 placed in a lying state are placed.
8 is pin-joined to both ends of the truss 16. Both struts 18,
The lower end of 18 is pin-supported.

Thereafter, the lower chord material 12 is shortened and the truss 16
The arched truss is formed by curving the center portion of the truss upwardly and rotating the two columns 18 inward to build both columns 18 and 18 and fixing the column 18 and the truss 16. Form.

In the manufacturing method according to the fourth invention, first, a truss 16 having an upper chord material 10, a lower chord material 12, and a lattice material 14 is assembled at a factory or the like.

The lower chord member 12 constituting the truss 16 can be shortened at least partially by a predetermined length in the axial direction.
A tension cable 20 is slidably attached to the lower chord material 12.

Next, the assembled truss 16 is arranged at a predetermined position, and the columns 18, 1 arranged in a lying state are arranged.
8 is pin-joined to both ends of the truss 16. Both struts 18,
The lower end of 18 is pin-supported.

Thereafter, the tension cable 20 is tensioned to shorten the lower chord material 12, and the truss 16 is curved in an arc shape to push the center portion upward. At that time, the two pillars 18 are rotated inward to build the two pillars 18, 18 and
By fixing the truss and the truss 16, an arched truss is formed.

In the dome construction method according to the fifth invention, first, a plurality of trusses 16 having the upper chord material 10, the lower chord material 12, and the lattice material 14 are assembled in a factory or the like.

The lower chord 12 constituting the truss 16 can be shortened at least partially by a predetermined length in the axial direction.
A tension cable 20 is slidably attached to the lower chord material 12.

Next, a plurality of these trusses 16 are arranged at predetermined positions in parallel, and
The upper ends of the truss 8 and 18 are pin-joined to both ends of each truss 16.

Then, between the trusses 16, 16 and the support 1
Attach beams, roofing materials, etc. between 8,18.

Thereafter, each truss 16 is lifted upward by the hoist 22 and the lower end of the column 18 joined to each truss 16 is moved inward to build up both columns 18. Further, the lower end of each column 18 is supported on the foundation, and the upper end of each column 18 and the truss 16 are fixed.

Finally, the truss 16 is bent in an arc shape by pushing the tension cable 20 to shorten the lower chord material 12, and the center portion is pushed upward, thereby constructing a dome having a substantially kamaboko shape.

In the dome construction method according to the sixth invention, first, a plurality of trusses 16 having the upper chord material 10, the lower chord material 12, and the lattice material 14 are assembled in a factory or the like.

The lower chord 12 constituting the truss 16 can be shortened at least partially by a predetermined length in the axial direction.
A tension cable 20 is slidably attached to the lower chord material 12.

Next, a plurality of these trusses 16 are arranged at predetermined positions in parallel, and
8 and 18 are pin-joined to both ends of each truss 16. The lower ends of both columns 18 are supported by pins.

Then, between the truss 16, 16 and the support 1
Attach beams, roofing materials, etc. between 8,18.

Thereafter, the tensioning cable 20 is tensioned to shorten the lower chord material 12, so that each truss 16 is curved in an arc shape and the center portion is pushed upward, and at the same time, both struts 18, 18 are rotated inward. After being built, each pillar 1
An arched dome is constructed by fixing the truss 8 and the truss 16.

[0042]

According to the truss manufacturing method of the present invention, the truss 1
6 is pin-joined to both ends of the supporting member 18 in a state where it is laid down, so that the assembling position can be extremely lowered as compared with the conventional method (see FIG. 4A) (FIG. 4B).
reference).

In the method of constructing a dome according to the present invention, the work of mounting small beams and roofing materials between the trusses 16 can be performed on the ground, so that temporary materials such as scaffolds can be minimized. Materials can be transported easily. For this reason, it is possible to safely and easily construct a dome having a high effective ceiling height.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a method of manufacturing a truss according to the present invention.

A truss 16 having an upper chord material 10, a lower chord material 12, and a lattice material 14 is supported by a plurality of hoists 22 as shown in FIG. The struts 18 and 18 arranged by are joined by pins.

The lower chord 12 constituting the truss 16 can be shortened in the axial direction. That is, the lower chord material 12
Is composed of an outer tube 28 and an inner tube 30 as shown in FIGS. 2 and 3, and one end of the inner tube 30 is welded to one outer tube 28,
The other end of the inner tube 30 is slidably connected to the other outer tube 28.

The interval 1 between the outer tubes 28, 28 is set as shown in the figure, so that the inner tube 30 is exposed.

The tension cable 2 is provided inside the lower chord material 12.
0 is slidably inserted. One end of the tension cable 20 is fixed to one end of the truss 16, and the other end is supported by a hydraulic jack 32 provided on the other end of the truss 16. Note that hydraulic jacks 32 may be provided on both sides of the truss 16 to support the tension cables 20 from both sides.

After the work of installing the truss 16 and the support columns 18 is completed, as shown in FIG.
Can be lifted. As a result, the lower ends of the struts 18 are moved inward, and both struts 18 are built up, and the struts 18 and the truss 16 are fixed.

At this time, the lower end of one of the columns 18 is pin-joined to a base plate (not shown), and the lower end of the other column 18 is a guide rail 24 (FIG. 1) installed on a supporting ground.
(See (B)).

A base plate 26 is provided at the end of the guide rail 24, and the column 18 movably supported by the guide rail 24 is supported by the base plate 26 with pins when the construction work is completed.

Thereafter, the tension cable 20 is tensioned by the operation of the hydraulic jack 32. Tension cable 20
Is pulled, the length of the lower chord material 12 constituting the truss 16 is shortened, and the truss 16 is curved in an arc shape, whereby the central portion is pushed upward as shown in FIG. A truss is formed.

As described above, according to this embodiment, the truss 16 is pin-joined to both ends of the truss 16 in a state where the support 18 is laid down, and compared with the conventional method (see FIG. 4A). The assembly position can be extremely low (FIG. 4).
(Refer to (B)). For this reason, the installation work can be performed safely and easily, and a reduction in manufacturing cost and a reduction in working time can be achieved.

Next, FIG. 11 shows a second embodiment of the method of manufacturing a truss. In this embodiment, columns 18, 18 pin-joined to both ends of the truss 16 are supported by pins on a base plate 26.
Contrary to the embodiment, they are arranged so as to be inclined outward.

The lower chord 12 constituting the truss 16 can be shortened in the axial direction as shown in FIG. 3, and a tension cable 20 is slidably inserted into the lower chord 12.

One end of the tension cable 20 is fixed to an end of the truss 16, and the other end is supported by a hydraulic jack 32 provided at the other end of the truss 16.

After the work of installing the truss 16 and the strut 18 is completed, the tension cable 20 is tightened to shorten the lower chord material 12, and the truss 16 is curved in an arc shape to push the center portion upward. At this time, the two pillars 18 are rotated inward to build the two pillars 18 and 18, and the pillar 18 and the truss 16 are fixed to form an arched truss.

According to the present embodiment, since it is not necessary to move the support column 18 in parallel, assembly and installation work can be easily performed even in a limited space.

FIGS. 5 to 10 show a first embodiment of the dome construction method using the truss 16 described above.

As shown in FIG. 5 and FIG. 1 (A), a plurality of trusses 16 are arranged in parallel on a plurality of hoists 22, and struts arranged on both ends of each truss 16 in a lying state. 18, 18 are joined by pins.

The assembling of the truss 16 is carried out in principle at a factory for a transportable length.

Next, as shown in FIGS. 6 and 7, ground work is performed between the trusses 16, 16 and between the columns 18, 18, and small beams, braces, roofing 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.

After the installation work is completed, the truss 16 is lifted by the plurality of hoists 22 as shown in FIG. 8 and FIG. 1 (B), whereby both the columns 18 are moved inward and the columns 18 are built up. Thereafter, the lower end of each column 18 is supported on the foundation, and the column 18 and the truss 16 are fixed.

After removing the hoist 22 for lifting the truss 16 as shown in FIG. 9, the tension cable 20 is tensioned by the operation of the hydraulic jack 32.

When the tension cable 20 is pulled, the length of the lower chord material 12 constituting each truss 16 is shortened, and the truss 16 is curved in an arc shape.
As shown in (C), the center portion is pushed upward, and a dome having a substantially kamaboko shape is constructed.

As described above, according to the present embodiment, the work of mounting the small beams and the roofing material between the trusses 16 and 16 can be performed on the ground, so that temporary materials such as scaffolds can be minimized. Therefore, the material can be easily transported, so that a dome having a high effective ceiling height can be constructed safely and easily.

Further, since the dome can be constructed only by mounting the roofing material or the like and then laying up the support pillar and tensioning the tension cable, the construction is simple, the construction period can be shortened, and the cost for construction can be reduced.

FIGS. 11 to 13 show a second embodiment of the dome construction method using the truss 16 described above.

In this embodiment, columns 18, 18 which are pin-joined to both ends of the truss 16 are supported by pins on a base plate 26. These pillars 18 are formed in an inverted Y-shape as shown in FIGS. 12 and 13, and are arranged so as to be inclined outwardly, contrary to the first embodiment.

After the installation work of the truss 16 and the strut 18 is completed, a small beam, a roofing material and the like are attached between the trusses 16 and 16.

Thereafter, the tension cable 20 is tensioned to shorten the lower chord material 12, whereby each truss 16 is curved in an arc shape and the central portion is pushed upward, and simultaneously, both the columns 18, 18 are rotated inward. It is built.

Thereafter, the columns 18 and the truss 16 are fixed, small beams, outer wall materials and the like are attached between the columns 18, 18, and an arched dome is constructed.

According to this embodiment, it is not necessary to move the support column 18 in parallel, so that the dome can be easily constructed even in a limited space. In addition, since the column 18 is formed in an inverted Y-shape, the column 18 is excellent in aesthetic appearance.

[0075]

As described above, according to the method of manufacturing a truss according to the present invention, the truss is pin-joined to both ends of the truss while being laid down. Work at height is extremely low, as it can be lowered. For this reason, the installation work can be performed safely and easily, and the manufacturing cost and the working time can be reduced.

Further, according to the dome construction method of the present invention, the work of mounting the small beams and the roof material between the trusses can be performed on the ground, so that the temporary materials such as the scaffolds can be minimized. Materials can be easily transported, and therefore, a dome having a high effective ceiling height can be constructed safely and easily.

Further, since the dome can be constructed only by mounting the roofing material or the like and then laying up the strut and tensioning the tension cable, 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 front view showing a first embodiment of a method of manufacturing a truss.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged view of a portion D in FIG. 2;

FIG. 4 is a schematic diagram showing the operation of the present invention.

FIG. 5 is a perspective view (No. 1) showing a dome construction process.

FIG. 6 is a perspective view (part 2) showing a dome construction process.

FIG. 7 is a perspective view (No. 3) showing a dome construction step.

FIG. 8 is a perspective view (No. 4) showing a dome construction process.

FIG. 9 is a perspective view (No. 5) showing a dome construction step.

FIG. 10 is a perspective view (No. 6) showing a dome construction step.

FIG. 11 is a front view showing a second embodiment of the truss manufacturing method or the dome construction method.

FIG. 12 is a plan view showing a second embodiment of the dome construction method.

FIG. 13 is a side view showing a second embodiment of the dome construction method.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-69739 (JP, A) JP-A-3-260237 (JP, A) JP-A-4-31524 (JP, A) JP-A-4-315 368546 (JP, A) JP-A-63-93943 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/32 101

Claims (6)

(57) [Claims] An upper chord (10), a lower chord (12) at least partially shortenable, and a lattice (14).
And a truss (16) having a truss (16) is assembled, and upper ends of the struts (18, 18) arranged in a laid state are respectively pin-joined to ends of the truss (16). And lift the upper part, move the lower end of each column (18) inward to build both columns (18, 18), and support the lower end of each column (18) on the foundation.
By fixing the upper end of each strut (18) and the truss (16), shortening the lower chord (12), bending the truss (16) into an arc shape and pushing up the central portion, the arched truss is formed. Forming a truss. 2. An upper chord material (10), a lower chord material (12) at least partially shortenable, and a lattice material (14).
And a tension cable (20) in the lower chord (12).
Assembles a truss (16) slidably attached thereto, and pin-joins the upper ends of the struts (18, 18), which are laid down, to the ends of the truss (16), respectively. At (22), lift up, move the lower end of each column (18) inward to build both columns (18, 18), and support the lower end of each column (18) on the foundation.
The upper end of each strut (18) is fixed to the truss (16), and the tension cable (20) is tightened to shorten the lower chord (12), so that the truss (16) is curved in an arc shape and the center portion is formed. Push up to form an arched truss,
A method of manufacturing a truss, characterized in that: 3. An upper chord (10), a lower chord (12) at least partially shortenable, and a lattice (14).
And a truss (16) having the following structure:
After pinning the ends of the truss (16) to the upper ends of the truss (8, 18), the lower chord (12) is shortened, the truss (16) is curved in an arc shape, and the central part is pushed upward, and simultaneously, A method of manufacturing a truss, characterized in that the pillars (18, 18) are rotated and built, and the pillars (18) and the truss (16) are fixed to form an arched truss. 4. An upper chord material (10), a lower chord material (12) at least partially shortenable, and a lattice material (14).
And a tension cable (20) in the lower chord (12).
Assemble the truss (16) slidably attached, lay down and lay down, and support the lower end with a pin (1)
The ends of the truss (16) are pin-joined to the upper ends of the truss (8, 18), respectively, and then the truss (20) is tightened to shorten the lower chord (12), thereby bending the truss (16) into an arc shape. And push the center part upward, and at the same time, both struts (18, 1
8) A method of manufacturing a truss, characterized in that an arch-shaped truss is formed by rotating the truss (8) and fixing the support (18) and the truss (16). 5. An upper chord (10), a lower chord (12) at least partially shortenable, and a lattice (14).
And a tension cable (20) in the lower chord (12).
Assembles a large number of trusses (16) slidably mounted, arranges a plurality of these trusses (16) in parallel, and attaches the upper ends of the two struts (18, 18) that are laid down. Each truss (16) is pin-joined to the end of each truss (16), and small beams and roofing materials are attached between the trusses (16, 16) and between the struts (18, 18). ) Is lifted upward by the hoist (22),
The lower end of the strut (18) joined to each truss (16) is moved inward to build both struts (18, 18), and the lower end of each strut (18) is supported on the foundation,
The upper end of each strut (18) and the truss (16) are fixed, and the truss (20) is tensioned to shorten the lower chord (12), so that each truss (16) is curved in an arc shape and the central portion is formed. Dome construction method characterized in that the dome is pushed upward to construct a roughly kamaboko-shaped dome. 6. An upper chord (10), a lower chord (12) at least partially shortenable, and a lattice (14).
And a tension cable (20) in the lower chord (12).
Assembles a large number of trusses (16) slidably mounted, arranges a plurality of these trusses (16) in parallel, lays down, and supports two struts (18, Pins are connected to the ends of each truss (16) arranged in parallel with each other, and after attaching small beams and roofing materials between the trusses (16, 16) and between the struts (18, 18), tension cables By tensioning (20) and shortening the lower chord (12), each truss (16) bends in an arcuate manner and pushes up the central part, while simultaneously supporting both struts (18,
A dome construction method characterized by constructing an arch-shaped dome by rotating the truss (18) and building the truss (16) while fixing the pillar (18) and the truss (16).