JPH08246556A - Elliptic large-sized dome and its construction method - Google Patents

Abstract

PURPOSE: To easily and safely provide an elliptic large-sized dome fitted with a movable roof which is clear and rational in processing of load, and is large in rigidity, and is abundant in safety even with large span. CONSTITUTION: A keel truss in structure of stretched chord beams in parallel crosses is made of main keel arch members 1 and 1 and sub keel arch members 2 and 2, and a roof (movable roof 7 and a fixed roof 8) is laid to this. A temporary vent pole erected at each intersecting point of the keel arch members is utilized for the preservation of safety until the setup of the keel arch members and the chord stretching work are finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oval large dome which can be used for various purposes and a method for constructing the same.

[0002]

2. Description of the Related Art Heretofore, various proposals have been made for a large dome, and as a large roof structure having an opening / closing roof, one having an opening / closing roof installed between a pair of parallel arch beams is known (for example, Japanese Patent Publication No. 1-2223237 and Japanese Patent Publication No. 2-58647), the conventional example in which an opening / closing roof is installed between a pair of parallel arches is a large scale for securing stability separately in the case of a large span. Means are needed.

[0003]

It is an object of the present invention that the load handling is clear and rational, the rigidity is large, the stability is large even in a large span, and the open / close roof can be easily and safely installed. It is to provide a dome and an advantageous construction method thereof.

[0004]

The basic feature of the ellipse large dome of the present invention is that a pair of main keel arch members in the long side direction and a pair of sub keel arch members in the short side direction are assembled in a cross beam shape. , A cable is stretched between both ends of the main keel arch member and the sub-keel arch member, and a bundle material projecting downward is provided at each intersection of the main keel arch member and the sub-keel arch member with the cable. Support to push it up to form a cross-shaped keel truss,
The point is that the roof is constructed by constructing a roof on the keel truss.

And, in the oval large dome of the present invention,
An openable roof on the top of the keel truss and a fixed roof on the hem.
Providing each of them, providing rails for running and guiding the roof on the main keel arch member, providing a roof support along the entire circumference of the roof, and separating the roof and the roof support from the internal facilities structurally It is possible to install a seismic wall on the roof support part.

Next, the constructional feature of the method for constructing an oval large dome of the present invention is that when constructing an oval large dome having the above-mentioned basic construction, a main keel arch member and a sub keel are formed from the ground surface. A temporary vent strut extending up to each intersection of the arch members is erected, and using this temporary vent strut, a cross girder-shaped assembly of the main keel arch member and the sub-keel arch member is formed, and the girder-like assembly is formed. The point is to maintain a stable state until the cable tension work is completed.

In the method for constructing an oval large dome of the present invention, first, at both ends of the dome in the long side direction,
Forming an assembly of main keel arch members and sub-keel arch members, and then erection of a central portion of the main keel arch members to form a cross girder assembly of main keel arch members and sub-keel arch members. Is good.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings showing the outline of one embodiment of an oval large dome of the present invention, 1 is a main keel arch member extending in the long side direction of a large dome having an oval planar shape,
Reference numeral 2 is a sub-keel arch member that also extends in the short side direction.

Each pair of the main keel arch member 1 and the sub-keel arch member 2 is assembled in a cross beam shape, and the cables 3 and 4 are stretched between both ends of the main keel arch member 1 and the sub-keel arch member 2, respectively. Along with these cables 3 and 4, the bundle material 5 projecting downward at each intersection of the main keel arch member 1 and the sub-keel arch member 2 is supported so as to be pushed upward, and the keel truss 6 in the form of a double girder is formed. Then, a roof is erected on the keel truss 6 to form a roof portion of the dome.

In the illustrated embodiment, the opening / closing roof 7 is provided at the top of the keel truss 6 and the fixed roof 8 is provided at the hem to form the roof 9. However, when the opening / closing roof is provided, the roof 9 is installed. The location is not limited to the top, and the entire roof may be a fixed roof without being provided with an opening / closing roof.

In the illustrated embodiment, the main keel arch member 1 is a space truss beam having a diamond-shaped cross section, the slope of which is relatively gentle, and the upper half of the main keel arch member 1 extends outward beyond the inner and outer boundaries of the dome. It extends and runs on an openable roof over the entire length of the chord.
Guide rails are provided.

The sub-keel arch member 2 is a space truss beam having a W-shaped cross section, and the slope thereof is the main keel arch member 1.
Of the main keel arch member 1 is about 1/2 of that of the main keel arch member 1 and intersects with the lower half of the main keel arch member 2 at the same level.

On both sides of the opening / closing roof 7 that moves along the main keel arch member 2 while being sandwiched between the upper half portions of the main keel arch members 2 on both sides, a multi-roller type traveling device and a horizontal guide are provided on both sides. A roller and a driving pin gear are provided, and a pin rack gear for engaging the pin gear is provided on the upper chord member of the main keel arch member 2 outside the rail.

The opening / closing range of the openable / closable roof 7 varies depending on the type of competition held in the dome, but in the case shown in the figure, it is opened to the side beyond the horizontal position of the sub-keel arch members 2, 2. It has become.

The roof support portion 10 for supporting the roof portion 9 constructed as described above is provided along the entire circumference of the roof portion 9, but the force flow from the roof portion 9 to the roof support portion 10 is large. For clarity, the roof 9 and roof support 10 may be structurally separated from an internal facility 11 such as a stand.

The roof support portion 10 is composed of a vertical force support portion formed of a precast concrete boundary column and a boundary beam at the inner and outer boundary portions of the dome, and a horizontal force support portion provided on the outer side thereof through a brace material. In this case, it is advisable to provide a horizontal wall for the horizontal force support.

Next, in the method for constructing an oval large dome of the present invention, when constructing the roof portion 9 of the aforementioned oval large dome, each of the main keel arch member 1 and the sub keel arch member 2 is formed from the ground surface. Four temporary vent columns extending up to the intersection position are erected, and the main keel arch members 1 and 1 and the sub-keel arch members 2 are utilized by using these temporary vent columns.
The double girder assembly is formed, and the double girder assembly is held in a stable state until the work of stretching the cables 3 and 4 is completed.

The formation of the above-mentioned cross girder-like assembly is performed by forming the main keel arch members 1, at both ends in the long side direction of the dome.
An assembly of the end portion 1 and the sub-keel arch member 2 (end portion assembly) is formed first, and then the central portion of the main keel arch member 1, 1 is installed between the sub-keel arch members 2, 2. Good practice in order.

The above-mentioned end assembly is divided into blocks of an appropriate size, each block is assembled at a low position near the ground surface, and this is pulled up onto the erection vent stanchions and connected by a so-called block construction method. Preferably formed,
In this case, it is necessary to provide an appropriate number of temporary vent struts outside the above-mentioned four temporary vent struts, but these temporary vent struts are removed after the formation of the end assembly.

The above-mentioned four temporary vent struts hold the above-mentioned cross girder-like assembly in a stable state until the work of stretching the cables 3, 4 is completed, so that the installation of the bundle 5 and the cables 3, 4 are prevented.
Needless to say, it is necessary to install it so as not to interfere with the work of tensioning.

When forming the assembly of the main keel arch members 1 and 1 and the sub-keel arch member 2, the end portions of the main keel arch members 1 and 1 are connected with a fixed roof therebetween. It may be assembled.

[0022]

The large oval dome of the present invention is as described above, and since the keel truss in which the string beams are assembled in the shape of a cross beam bears most of the roof load, it is possible to reduce the roof load. Not only can it be treated in a self-supporting manner, the treatment of load is clear and rational, but it is also highly rigid and highly stable even in large spans, and it can be easily and safely equipped with a roof.

Further, the method for constructing an oval large dome of the present invention is as described above, and by taking advantage of the structure of the roof portion, the temporary construction is established at each intersection of the keel arch members forming the keel truss. Since the roof part is constructed by using the vent columns to assemble the keel truss and hold it stably, it is possible to secure sufficient work safety and efficiency.

[Brief description of drawings]

FIG. 1 is a plan view of an example of an oval large dome of the present invention.

FIG. 2 is likewise a cross-sectional view in the long side direction.

FIG. 3 is likewise a sectional view in the direction of the short side.

[Explanation of symbols]

1: main keel arch member, 2: sub keel arch member, 3: cable, 4: cable, 5: bundle material, 6: keel truss, 7: open / close roof, 8: fixed roof, 9: roof part,
10: roof support, 11: internal facility.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Cornelis Alberts Maria Boss 2243 AC, Wackeshagenran 16 Wasenar, The Netherlands 16

Claims (8)

[Claims] 1. A pair of main keel arch members in the long-side direction and a pair of sub-keel arch members in the short-side direction are assembled in a cross beam shape, and the main keel arch member and the sub-keel arch members are provided between both ends thereof. A cable is stretched, and the cable is supported so as to push upward a bundle material projecting downward at each intersection position of the main keel arch member and the sub-keel arch member, thereby forming a cross-shaped keel truss, A large oval dome characterized in that a roof is constructed by constructing a roof on the keel truss. 2. The large oval dome according to claim 1, wherein an opening and closing roof is provided on the top of the keel truss and a fixed roof is provided on the hem. 3. The large oval dome according to claim 2, wherein the main keel arch member is provided with a rail for running and guiding an openable roof. 4. The oval large dome according to claim 1, wherein a roof support portion is provided along the entire circumference of the roof portion. 5. The oval large dome according to claim 4, wherein the roof part and the roof support part are structurally separated from the internal facility. 6. The oval large dome according to claim 4, wherein an earthquake-resistant wall is provided on the roof support portion. 7. When constructing the oval large dome according to claim 1, a temporary vent strut extending from the ground surface to each intersection of the main keel arch member and the sub-keel arch member is erected, and the temporary vent strut is provided. Is used to form a cross girder-like assembly of a main keel arch member and a sub-keel arch member, and the cross girder-like assembly is held in a stable state until the cable tensioning work is completed. How to build a large dome. 8. First, an assembly of a main keel arch member and a sub-keel arch member is formed at both ends of the dome in the long side direction, and then a central portion of the main keel arch member is erected. 8. Forming a cross girder assembly of a main keel arch member and a sub keel arch member.
How to build the large oval dome described.