JPS584042A - Construction of dome type large roof - 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 The present invention relates to a method for constructing a large dome-shaped roof in an all-weather stadium or the like.

A large-scale steel-framed dome-shaped roof with a diameter of approximately - ('0m s to 20 degrees) has not yet been constructed in Japan, and there are only a few examples of construction outside of Japan.
0.These large dome-shaped roofs were constructed using the Tomo method, which involved constructing large-scale shoring across the entire area of the roof, and then lifting and assembling the steel frame with a crane. It is.

Therefore, many large temporary supports are required, and a huge amount of materials and
This requires labor and construction costs, requires a large crane to lift heavy objects to a high position, and is also a large-scale temporary construction work, which obstructs the progress of other works and disrupts the overall work. Because the construction period is long and there is a lot of work at heights,
Not only did it require extensive curing (safety measures against falling), but there were also major problems in terms of construction efficiency and quality assurance.

The present invention provides a dome that can solve these problems.

This paper proposes a method for constructing a large-sized roof.

That is, the method for constructing a large dome-shaped roof according to the present invention includes a central gantry equipped with a tower crane in the center of the construction site.
In the outer part, there is an outer stand with pillars positioned at predetermined intervals above the ring, and between these two stands there are #4w! After assembling the movable gantry with a planar rectangular hexagonal shape corresponding to the cornice between the large tofus, and assembling the complete V-yon ring of the dome-shaped large roof steel frame on the central gantry, the large tofus were assembled on the movable gantry. Then, move the movable gantry one after another by a predetermined angle and erect the large tofus in the same way, and by the seventh rotation of the movable gantry, all the large tofus are radially installed. Next, adjacent large troughs are connected by a unit of tension ring, and a movable gantry is placed below between these two hole troughs, and the tower crane is mounted on the movable gantry. Build a roof top between the large tops using a crane that travels on the ground, then add tension rings one after another, move the movable gantry to a predetermined angle, and construct the roof top! Returning, the tension ring and roof truss for the entire station were constructed by making the third turn of the visiting gantry, and the third rotation of the movable gantry was completed.
It is unique in that finishing work on the underside of the roof and equipment work are carried out during the subsequent turns.

Embodiments of the present invention will be described below based on the drawings.

First, as shown in Figures 1, 2 (a), and 8 (a), a central gantry 2 equipped with a self-climbing tower crane 1 is installed in the center of the construction site, and a circular structure is installed on the outer periphery. An outer stand 4 with 3 meters of permanent pillars located at predetermined intervals on the ground and 3 temporary pillars located inside them, and a stand 4 between these two, with the central gantry 2 as the center. The angle between the large tofus 5 that can be rotated and is constructed radially (in this embodiment, one large tofu 5 is constructed radially, and the large tofus 5... The square tomb in between is yj
(However, the present invention is not limited to this.)
A movable gantry 6 having a flat planar shape and a generally fan-like shape corresponding to the gantry 6 is assembled respectively, and a complex V-shaped ring 7 which becomes a part of the dome-shaped large roof steel frame is assembled on the central gantry 2.

Specifically, the central gantry 2, compression ring 7, movable gantry 6, and external station stand 4 are assembled in this order, but this assembly order can be selected as appropriate. The inner end of the movable gantry 6 takes a reaction force to the central gantry 2.
It is supported via a shoe whose surface is treated with Teflon (trade name) on a ring-shaped lay fi/8 provided around the ring. Further, the outer end leg portion of the movable gantry 6 takes a reaction force against the main structure, and is supported by a ring-shaped rail 9 laid on the floor via a similar shoe. The reference numeral 10 designates a large tonnage support that is assembled on the movable gantry 6 in a manner that allows it to be disassembled freely, and the reference numeral 11 designates a cloetz crane mounted on the movable gantry 6. A portion 4' of the outer peripheral stand 4 that poses an obstacle to the rotation of the movable gantry 6 (shown by a phantom line in FIG. 1) is expanded after the movable gantry 6 is dismantled. The permanent pillar 6m supports the large tofu frame 5 so that it can be moved in the radial direction of the large dome roof in order to absorb the shrinkage of glue bales for the dome-shaped large roof due to temperature changes, and the temporary pillar 3h supports the steel frame construction. It is provided to prevent the above-mentioned movement at the time of t-.

Next, as shown in Fig. 2 (b) and Fig. 8 (b), the assembled large tofu unit 5# is lifted onto the movable gantry 6 by the Kroetz crane 12 on the ground. Crane 1
2. Using the crawler crane 11 of the tower crane 1 and the mobile gantry 6, assemble the large truss 5 on the mobile gantry 6, install it between and 3, and dismantle and remove the large truss support 10. Then, the movable gantry 6 is moved by a predetermined angle and the next large truss 5 is erected by the same procedure, and the same process is repeated 1# one after another, and the entire large truss is erected by turning the movable gantry 6 /@1. A total of laths 5... are constructed radially.

Next, as shown in Fig. 2 (C) and Fig. 8 C→, the adjacent large trusses 5 are connected by a tension ring unit 16# in the vicinity of the columns 5m and 5h on the to side. (A ground crawler crane 12 is used for this work.)
After that (or prior to this), the movable gantry 6 is placed below between the two trusses 5, directly below the roof truss construction position, and the assembled roof truss unit 14#.
...All of the above tower crane 1, crawler crane 11.
12 is suspended, and while the movable gantry 6 is used as a work floor, the range of construction is by the roof truss 14-71 in a flat fan shape. Indicates a range.

Then, as shown in FIGS. 2), (e) and 8) and (f), the tension ring units 13i are successively added, the movable gantry 6 is moved by a predetermined angle, and the fan-shaped roof truss 1 is moved.
4 is repeated and the movable gantry 6 turns for the second time to completely cover the tension ring 13 and roof truss 14.
..., and after the third rotation of the movable gantry 6, finish work on the lower surface of the roof and equipment work are carried out, and after that, the movable gantry 6 is dismantled and the rear construction section 4' of the outside fanning stand 4 is constructed.
The project will include expansion work, jacking down and dismantling the central gantry 2, and finishing work on the outer stand 4 and the grounds.

It should be noted that the roofing work is carried out at the same time as constructing the fan-shaped roof trusses 14. In addition, in the dormitory bunker example of the 1st generation, 3 of the movable gantry 6
At the time of the first turn, finishing work on the underside of the roof and equipment work are performed at the same time, but these works may be done separately when the movable gantry 6 turns for the third time and for the first turn H. You may let them do it.

Figure 4 (A) to (E) are different sj! An example will be shown, in which the height of the central gantry 2 and the movable gantry 6 are lowered, and the construction of the large roof steel frame, finishing work on the underside of the roof, and equipment are carried out in the same process as in the previous example, by lowering the height of the central gantry 2 and the movable gantry 6. The present invention is characterized in that the entire large dome-shaped roof is lifted up to a predetermined height after the construction work is carried out and the central gantry 2 and the movable gantry 6 are dismantled. There is.

■ Labor saving is possible.

That is, since the steel frame work for the large dome-shaped roof is carried out by rotating the planar, generally fan-shaped movable gantry at predetermined angles around the central gantry, the number of temporary supports for the steel frame work can be reduced, which is rational.

To assemble the movable gantry between the central gantry and the outer stand,
The foundations of the central pedestal and permanent structure (outer stand) can be used, and a special foundation for the movable pedestal is not required.

There is no need for safety measures such as large-scale work scaffolding or fall protection over the entire roof.

As the large truss, roof truss, etc. are assembled on a movable gantry close to the large roof construction location, there is no need for a large crane. It is possible to assemble the entire large roof using a small crane such as a small crane.

The 7th turn of the movable gantry builds the large radial truss, the 7th turn builds the roof truss and tension ring, and the 3rd and subsequent turns complete the downward finishing work and equipment for the roof. Since the construction work is carried out, it is only necessary to load the tools and materials required for each process on the movable gantry, and the top surface of the movable gantry can be used effectively.In addition, work efficiency is high because the same work is repeated. Also, it is rational as it does not require different types of workers at the same time.

Since one mobile unit is used as a work floor for equipment construction and finishing work, the amount of temporary construction work is greatly reduced.

Therefore, it has become possible to save labor.

■ Can be constructed with short construction regulations.

Preparation for large roof steel frame construction: Relatively little space is required, so
Large roof steel frame work can be started quickly, and there are fewer restrictions on rounded and flat areas, which do not require large-scale temporary construction work, and there is a high probability that the work can be carried out concurrently with other construction work. Therefore, the construction period can be shortened.

■ Easy to manage, easy to ensure quality, and has great safety standards.

In other words, since there is a work floor (mobile gantry) near the work position,
Inspection, confirmation, adjustment, etc. are easy, and there are few high places, so safety is high.

■ Cost reduction is possible.

In other words, it is possible to reduce costs overall by saving labor, shortening the construction period, reducing temporary construction materials, using small cranes, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic side view, FIG. 2 is a schematic plan view showing the steps, and FIG. , 6ff) , (c),
) and (f) are schematic side views showing the process, and Figure 4 is G().
, u), (c), ni). (E) is a schematic side view showing steps in another example. 1... Tower crane, 2... Central gantry, 5
-93...Pillar, 4...Outdoor stand, 5...
Wood truss, 6...Movable gantry, 7...Combretsu V-yon ring, 11.12...Crane, 1
3 (-... Tension ring, 115g-... Tension ring unit, 14... Roof truss, 14
1- Roof truss unit. Procedural amendments (5) Mr. Commissioner of the Patent Office” 1 Case indication 11R sum 5f 1 year Patent 111glogsss No. 2°
Title of invention 0 Method of constructing a large dome-shaped roof 3, Relationship with the case of the person making the amendment 4 Patent agent 5 Date of amendment order 6 Number of inventions increased by amendment (2) Commission to be attached to the application replenish the status.

Claims (1)

[Claims] In the center of the construction site, there is a central gantry equipped with a tower crane, and on the outer periphery there are external ringing stands equipped with pillars placed at predetermined intervals on a round pigeon, and between these two, there is a central gantry with a tower crane at the center. Each movable gantry was assembled in the shape of a planar fan shape that could be rotated and corresponded to the angle between the large trusses constructed in a radial manner, and a compression ring with a dome-shaped large roof steel frame was assembled on the central gantry. After that, assemble the large tofu on the movable gantry and install it between the compression ring and the pillars, and then move the movable gantry one after another by a predetermined angle and erect the large tofu in the same way until the seventh rotation of the movable gantry. Build all the large trusses in a radial manner, then connect the large trusses that meet each other with a unit of tension ring, and place a movable gantry below between these large trusses in good condition. Using the tower crane, nine cranes mounted on the movable gantry, and a crane traveling on the ground, a roof frame is constructed between the large trusses, and then tensile tower units are added one after another, and the movable gantry is constructed. By repeating the movement of a predetermined angle and the construction of the roof top for the first turn of the mobile gantry, construct the tension ring and roof truss all at once, and for the third and subsequent turns of the mobile gantry. y) A method for constructing a large dome-shaped roof, which is characterized by performing finishing work on the underside of the roof and equipment work.