JPH03260237A - Erection of dome structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a construction method for a dome structure suitable for use on the roof of a multi-purpose stadium or the like.

``Conventional Technology'' Dome structures are commonly used as roof structures for securing large spaces such as stadiums, multipurpose halls, and experimental buildings. This dome structure forms a dome-shaped roof by erecting arch-shaped steel trusses radially from the top to the upper part of the substructure.For example, when applied as a baseball stadium, the dome has a height of 60m or more so that baseball can be played inside the dome. It is possible to secure a high space with an effective height of .

Conventionally, there is a method shown in FIG. 5 as a method for constructing such a dome-shaped roof.

In this conventional method, several rows of supports 3 corresponding to the arch lengths of the steel trusses 2 are arranged at the erection positions of all the steel trusses 2 inside the substructure 1, and at each erection position, the The divided units 4 of the truss 2 are lifted up by a tower crane 5 or the like and erected between the corresponding supports 3, and the divided units 4 are joined together to form each steel truss 2. In this way, each steel truss 2 is radially arranged. By constructing the roof, the entire dome-shaped roof is constructed.

"Problem to be solved by the invention" However, according to the above-mentioned conventional erection method, for all of the steel trusses 2 to be erected, the support 3 for erection
Therefore, it was necessary to erect and construct a large number of shoring structures for the roof in multiple layers. Moreover, since each steel truss 2 receives a large horizontal load during erection, the shoring 3 has also become oversized.

In particular, in the case of constructing a baseball dome, a support 3 with a height of about 70m is required in the central part, which requires a huge amount of steel for the entire support, and the temporary construction of the support is large-scale. The disadvantage was that the temporary construction costs were large. For this reason, it was not possible to effectively reduce construction costs.

Furthermore, since all the steel trusses 2 are to be erected at their respective erecting positions, and the number of cranes is limited, the work efficiency cannot be said to be good and it is not possible to effectively shorten the construction period. Ta. In particular, since shoring was erected over the entire surface when the roof was being erected, it was not possible to carry out granite work while the roof was being erected, which also contributed to the lengthening of the construction period.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dome frame construction method that can effectively reduce construction cost and construction period, thereby realizing an economical structure.

``Means for Solving the Problems'' The present invention is a construction method in which a dome frame consisting of arch-shaped frame units divided radially from the top is erected on a lower structure, in which the erected gantry is placed in the center of the erected area. while erecting the frame units one unit or several units at a time between the erected gantry and the lower structure from a desired position in the erecting range, the erected frame units are sequentially rotated toward the erected pedestal opening. By letting
It is characterized in that all the frame units are arranged radially to form a dome frame.

"Operation" According to the present invention, while constructing the frame unit from a desired position in the construction range between the construction gantry in the center of the construction range and the substructures around it, one unit or several units at a time,
The entire dome frame is formed by sequentially rotating and moving the constructed frame units in the direction of the construction range and arranging each frame unit radially.

In addition, since only the central erection pedestal and work stage are sufficient for the erection of one unit or several units, there is no need for support for the entire erection area.
It is possible to simultaneously construct the lower structure in the construction range other than the construction gantry and the work stage.

Furthermore, since the supporting points of the shoring are supported by rollers, no horizontal force is generated in the frame unit, and an excessively large structure is not required.

"Example" Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the present invention,
In these figures, the symbol IO indicates the roof of the dome structure;
Reference numeral 11 indicates a lower structure on which the roof 10 is constructed.

As shown in FIG. 1, the roof constructed according to the present invention (the frame for the dome frame 0) extends from the top 12 to the lower structure (the upper part 13 of the lower structure opening 1) at equal intervals radially (in this example, 7
The main body is a plurality of arch-shaped steel trusses 14 constructed at intervals of 5 degrees.

This steel truss 14 is made by assembling upper chord members I5, lower chord members I6, and lattice members 17 into a box shape, and is divided into a plurality of (four in this embodiment) steel truss units 18 on the ground in advance. It is something that Also,
Adjacent steel trusses I4 are connected to each other by a connecting member 19 such as a connecting member or a place member provided between them.

The lower structure 1 has a circular ground 20 formed in the center and a stand (
21 (both of which are subject to roof construction), and a semi-annular roof support portion 22 provided around the infield side of the stand 21. A semi-annular support bed 23 for supporting the roof 10 is arranged on the upper surface of the roof support portion 22. This support bed 23 is movable rearward away from the stand 21 by a traveling mechanism, thereby allowing the roof to be mounted on the roof 10. 10 is movable in the same direction together with the support bed 23, so that the ground 20 can be fully opened.

The roof 10 of this embodiment is actually used as a part of a so-called retractable roof, and the outfield side swinging roof 24 shown by the dotted line in FIG.
By being stored inside the roof 10 and moving parallel to the rear along with the roof 10, the ground 20 is fully opened, while
reverse? The rotating roof 24 is configured to completely close the ground 20 space by rotating from the inside of the roof 10 to the outfield side.

The roof 10 of the above-described structure is constructed as follows.

(1) As a preparatory step, as shown in FIGS. 2 and 3, the construction pedestal 30 is erected at the center of the construction range of the roof 10 to be constructed on the ground 20. Similarly, a work stage 31 extending in the centrifugal direction from the construction gantry 30 is temporarily installed at the end of the construction range.

And the upper surface of the construction platform 30? This is provided with a centered annular bolted bottle support 32, and the bottle support 3
2 nearby position, the upper surface of the work stage 31, the support bed 2
3, on the top surface, roller bearings 33 with jacks (33a, 33b...
, 33c) are provided respectively.

(2) On the other hand, on the ground, the upper chord I5 and the lower chord 16
The required number of steel frame trusses 14 of the same shape are manufactured by assembling two girders made of lattice material 17 into a box shape, and dividing the roof 10 radially at equal intervals. Each steel truss 1
4 is divided into as many as possible to construct, and the steel truss unit 1
8. In this embodiment, each steel truss 14
The tip angle of the tube is set to 7.5 degrees, and each tube is divided into four in the centrifugal direction.

(3) First, the l#th steel truss I4 is erected (see Figures 2 and 3). In this case, at the end of the construction range, each steel truss unit 18 constituting the steel truss 14 is lifted onto the work stage 3I by the crane 5, and then each steel truss unit 18 is placed on the corresponding roller support on the work stage 3I. 33, and adjacent steel truss units 18 are joined together by means such as welding, thereby forming the entire steel truss 14, and the steel truss 14 is connected to the erection gantry 30, support bed 2, etc.
It will be constructed between 3 spaces.

In this construction state, the steel truss 14 has each roller support 3
3, the thrust force (horizontal reaction force) from the steel truss 14 is released to the outside by the rollers, and the erection gantry 30 and work stage 3I are not subjected to thrust force. Moreover, by adjusting and restraining the vertical deformation of the roller support 33 with a jack, the deformation of the roller in the truss direction can be reduced.

(4)! When the steel truss 14 of the unit is completed, each roller support 33b on the work stage 3I is completely removed. At this time, the upper end of the steel truss 14 on the construction gantry 30 is slightly deformed and bent in the truss direction.

Such deformation and deflection generate thrust force at the upper end of the steel truss 14 when the upper end of the steel truss 14 is supported by a bin support, but in the case of the present application, the upper end of the steel truss 14 is supported by the roller support 33a as described above. Since the upper end of the steel truss 14 and the bin support 32 are not connected, the thrust force is released to the outside by the rollers, and the erection gantry 30 itself is not subjected to the thrust force. Therefore, rational structural design of the erection gantry 30 is possible.

(5) After being jacked down, the steel truss 14 is considered to be a simple flexible structure constructed between the roller bearings 33a, 33a at both ends. Therefore, maximum stress and maximum deflection occur in the steel truss 14. Therefore, considering the state of the steel truss 14 after jacking down, the following measures will be taken.

(6) The increase in stress can be dealt with by increasing the steel truss 14 by M. At this time, in consideration of deformation, the steel truss 14 is given a camber in advance. Further, by stretching a PC steel wire between the upper and lower ends of the steel truss I4 and introducing prestress into the steel truss 14, the stress burden is reduced and deformation occurring in the steel truss 14 is suppressed.

(7) Next, attach the upper ends of each chord member 15, I6 of the steel truss 14 supported by the roller support 33a to the bin support 32 on the construction gantry 30, and attach the connecting member 34 by fitting it on-site.
, thereby completing the steel truss 14 of the unit. In this case, as a joining means, the tip of the connecting material 34 at the upper end of the steel truss 14 is connected to an annular pin support 3.
2 and then bolting or welding the tip end to the bottle support 32 may be used. In this case, there is an advantage that the upper ends of the steel truss I4, which are concentrated at the neck section ]3, fit together better. Note that the roller support 33a may be removed afterwards, or may be removed after the entire roof I3 is assembled.

Here, the upper end of the steel truss I4 is not connected to the bottle support 32 first, but is connected to the bottle support 321 later via the connecting material 34 assembled on site, so construction errors may occur. can be absorbed at the center, and concentration of stress and deformation on the steel truss 14 can be prevented compared to the case where it is joined to the bin support 32 from the beginning.

(8) Next, the steel truss 14 is turned toward the other end with the bin support 32 as the axis center, and the upper surface of the support bed 23 is rotated by an angle of 2 units (15 degrees) in the circumferential direction.

In this case, a bogie that can run on the rails laid on the upper surface of the support bed 23 is attached to the legs (lower end) of the steel truss I4, and the bogie is made to run circumferentially along the rails, or , the steel truss 14 is rotated by a desired angle by freeing the truck and pulling it in the tangential direction with a PC steel wire or the like.

(9) Next, at the location where the steel truss 14 was erected, the second steel truss 14 is erected between the erecting gantry 30 and the support bed 23 on the work stage 31 (see FIG. 4). The construction method is as described above (steps (3) to (7)).

(10) Then, a connecting material I9 such as a place material or a connecting material is constructed between the steel truss 14 and the first steel truss 14 that has been rotated by 15 degrees. This connecting material 1
The length dimension of each member 9 needs to be determined in consideration of deformation after jacking down.

(11) Next, process the second steel truss 14 (
8), it is rotated by 15 degrees in the circumferential direction together with the leading steel truss 14. The cart may be driven by itself, or the leading steel truss 14 may be pulled tangentially along a PCM line to rotate the entire structure.

(I2) Similarly, by repeating the above steps (3) to (8) for the remaining steel truss I4 temporarily placed on the ground, the remaining steel truss I4 is installed one unit at a time at the end of the erection range. erect it and rotate it forward in 15 degree increments.

In this way, by erecting the last steel truss 14 at the end of the construction range, all the steel trusses 14 are arranged radially from the bin supports 22 of the construction pedestal 30, and the entire roof IO is constructed. will be completed (first
(see figure).

(13) When the roof 10 is completed in this way, finally, the bin supports 32 of the erection gantry 30 are jacked down and the upper ends of each steel truss 14 are lowered all at once to a predetermined height, thereby completing the erection work. .

(14) Finally, the construction gantry 30 and work stage 31 are removed to complete the roof construction. In addition, roof 10
The ancillary work etc. will be carried out mainly at the same time as the roof 10 erection work.

According to the construction method of this embodiment, the following effects are achieved.

■ Since only one unit's worth of support is used for the erection of a steel truss, such as the erection gantry 30 and work stage 31, the number of supports can be significantly reduced compared to the case required for the erection of a conventional all-steel truss. You can reduce it. This makes it possible to reduce the amount of steel required for shoring, reduce the number of man-hours for temporary construction work, and reduce temporary construction costs.

■ In spaces where there is no shoring on the ground or 20, it is possible to construct the substructure at the same time, and since the area for erecting the shoring is greatly reduced, the construction range for substructure II is expanded, improving work efficiency. It is possible to shorten the construction period.

■ The support condition at the top 12 of the steel truss 14 is initially set to the roller bearing 33, and is changed to the bin support 32 after the steel truss 14 is deformed by jacking down, so the erection gantry 30 is supported by the thrust from the steel truss 14. It is possible to rationalize the structure of the erection gantry 30 without being subjected to force.

■ The work stage 31 where the steel truss 14 is to be erected is
Since the all-steel truss 14 is erected by just one location at the end of the roof IO construction range, there is less movement of the lifting equipment, and the work of erecting the steel truss 14 can be performed efficiently and safely. can. In addition, the number of lifting machines is sufficient for one work stage, and each steel truss unit +8 is lifted at one location, so higher work safety can be ensured.

■ At the apex 13 where the upper ends of each steel truss 14 are concentrated, the upper ends of each steel truss 14 are supported according to the above-mentioned support conditions, and finally the connecting member 34 assembled on site
Since it is connected to the central bottle support 32, errors such as construction errors and manufacturing errors of each steel truss 14 and temperature deformation can be absorbed at the center, and the upper ends can fit together well.

Note that this embodiment is based on a roof 10 that forms part of a retractable roof.
However, the construction method is not limited to such retractable roofs, but can also be used to construct retractable roofs with two or three layers, such as two-layered or three-layered roofs. suitable.

In addition, the present invention can be applied to all dome structures, such as when constructing a large-scale dome-shaped fixed roof.

``Effects of the Invention'' As explained in detail above, the present invention is a construction method in which a dome frame consisting of arch-shaped frame units divided radially from the neck is erected on a substructure. A construction gantry is arranged in the center, and while the construction units are constructed one by one between the construction gantry and the lower structure from a desired position in the construction range, the constructed construction units are sequentially rotated around the opening of the construction construction pedestal. By moving, all the frame units are arranged radially to form a dome frame, so the following effects are achieved.

Since all the structural units are erected at desired positions within the construction range, the number of supports for erection and the area in which they are erected is sufficient for one unit, which greatly reduces the number of supports. The range of shoring in the construction range can be reduced.

As a result, it is possible to reduce temporary construction costs, and simultaneously construct the substructure outside the shoring area, thereby improving productivity. Furthermore, the entire dome structure is formed by simply rotating and moving the frame units sequentially from the predetermined erection position, which not only improves the efficiency of the erection work, but also reduces the erection cost and construction period. This makes it possible to achieve an economical dome structure.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a plan view of the dome frame, Figure 2 is a drawing of the construction work of the frame unit, and Figure 3 is the construction of the first frame unit. FIG. 4 is a plan view showing the state in which the second frame unit is installed, and FIG. 5 is a side view showing the conventional construction method. 10... I I... 12... 14... l 8... 30... Roof (dome frame), lower structure (lower structure), neck, 13... Top surface, steel truss (frame unit), steel truss unit, erection pedestal, 1 work stage.

Claims (1)

[Claims] In a construction method in which a dome frame consisting of arch-shaped frame units divided radially from the top is erected on a substructure, an erecting pedestal is placed in the center of the erecting range, and the frame unit is installed from a desired position in the erecting range. The dome frame is constructed by arranging all the frame units in a radial manner by sequentially rotating and moving the constructed frame units around the frame structure while installing one unit or several units between the frame structure and the lower structure. A dome structure construction method characterized by forming a dome structure.