JPS6226381B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a proposal for a construction method for an air membrane structure construction.

Although there are almost no examples of structures with air membrane structures in Japan, the construction methods currently in use are as shown in Figures 1 and 2.

That is, as shown in FIG. 1, first, the wire 1 is pre-erected on the ring beam 4 at the upper end of the frame 3 using a retrieval car 2, a military helicopter 2', etc. (Figure a), and then the intersection of the wire 1 is tightened and The film 5 is pasted using a gondola 6 installed on the wire 1 (Figure b), or as shown in Figure 2, a stage 7 is hung over the entire surface below a predetermined film surface level, and this is used to paste the wire 1 and the film. There are two ways to paste 5.

In both cases, the construction of the membrane roof structure will be carried out after the internal structures such as the bleachers S are completed.

However, in the case of the construction method as described above,
First of all, regarding the membrane roof frame, since the construction method shown in Figure 1 involves work at high places, quality control of intersections, membrane connections, etc. is likely to be insufficient, resulting in poor wire accuracy,
The membrane is prone to twisting, the construction period is inefficient and long, and there are safety issues.
The construction method shown in the figure can eliminate the former problem, but the construction at a high place involves a huge number of stages, which poses problems in terms of construction time and cost.

In addition, regarding the construction period, since the internal structures will be constructed outdoors, the construction period will inevitably be affected by the weather, but given the current strict order conditions, it is especially Even though there are more and more construction projects that have to overcome the construction period,
The disadvantage is that there are many days when work is impossible due to weather, making the construction period even more difficult.

In view of the above-mentioned circumstances, the present invention was made to develop a new construction method that can completely eliminate the above-mentioned difficulties. The ends of the wires are first secured to the wire lifting guide posts erected on the periphery of the structure, and the posts are raised to a predetermined position midway.In this state, the wire intersections are tightened and the membrane is pasted on the ground. Do it at work,
After completion, the wire is raised further and the end of the wire is pivotally assembled to the mounting bracket installed on the ring beam at the top of the frame. After that, the post is removed and the membrane roof frame work is carried out by wire and membrane erection. Improve work efficiency (quality), shorten construction time, and improve work efficiency (quality) by performing work on the ground instead of work at height
In order to increase safety, after the construction of the membrane roof is completed, water will be stored in the upper part of the deflated membrane surface, and a rope or the like will be strung between the central lower surface of the membrane surface and the ground to protect it from the wind. By stabilizing the membrane roof, work on internal structures such as bleachers and internal facilities can be carried out regardless of the weather, thereby shortening the construction period.

Hereinafter, this will be explained in detail based on embodiment figures.

That is, in FIG. 3, reference numeral 8 denotes an outer peripheral frame, and 9 denotes an erection wire lifting guide post erected on the inner peripheral edge of the outer circumferential frame 8, and both ends of each erection wire 10 are locked so as to be movable along the outer circumferential frame. It is assembled, and each construction wire is installed facing each other around the outer peripheral frame 8.

The erection wire 10 is controlled to move upward along the post 9. Various driving means are possible, such as a combination of a stroke jack and a pinion rack, but in the illustrated example, the movement of the erection wire 10 is controlled. A wire rope 12 for hanging a metal fitting 11 attached to the end is connected to a pulley 1 disposed at the upper end of the post 9.
3 and wind it up with a winch 14 installed on the ground.

In this way, once both ends of all the construction wires 10 have been assembled to the posts 9, they are raised to a predetermined position midway through the posts 9, which is a predetermined height suitable for ground work, using centralized control, and then stopped once. Tightening of the intersections of the construction wires and pasting of the membrane 15 are carried out on the ground.

Thereafter, the construction wire 10' having completed the intersection tightening and membrane pasting is raised again, and the end fitting 11 is pivotally assembled to the mounting anchor 17 disposed on the ring beam 16 at the upper end of the outer frame 8. Erection is done by this.

After this, attach the wire rope 12 to the end fitting 11.
At the same time, the post 9 is removed.

In the figure, the dotted chain line of the construction wire 10' indicates an inflated state in which the roof membrane swells when internal pressure is applied.

The construction wire end fitting 1 in the above embodiment
1 and the construction wire lifting guide post 9 are shown in detail in FIGS. 4 and 5.

FIGS. 4a and 4b show the end fitting 11 for the construction wire, in which the bolt rod 10a at the end of the construction wire 10 is inserted through the front wall 11b of the approximately U-shaped frame 11a, and the washer 18, fixing bolt 19... The tails of both side walls 11c and 11'c are formed into a bracket 11d, and a fixing bolt (not shown) is inserted between the bracket 11d and the through hole 17a formed at the tip of the mounting anchor 17. The construction wire 10 is pivotally fixed to the ring beam 16 by passing it over, and a saddle-shaped hanging hook 11e is welded to the front end of the frame 11a, to which the wire rope 12 is fastened. The metal fittings 11 mentioned above shall be suspended, and the both side walls 11c, 1
Mounting shafts 11f, 11'f are provided protruding from 1'c, and rollers 11g, 11'g are assembled thereto, and as shown in the figure, the H steel columns 20, 20, which are assembled facing each other and which constitute the post 9, are mounted. 20', it is possible to lock the post 9. In addition, 21 and 21' in the figure are the rollers 1.
1g, 11'g H steel column 20 to prevent disengagement.
The rail is welded at the 20' end.

Next, the post 9 is shown in detail in FIG. 5, and in the illustrated example, as described above, the post 9 is constructed by having the H steel columns 20, 20' facing each other at a predetermined distance and spanning the yokes.

In the figure, 22 is a spacer extending between the ring beam 16 and the ring beam 16.

In the case of the membrane roof frame according to the construction method of the present invention constructed as described above, all of the tightening of wire intersections and membrane pasting can be done on the ground.
Work can be carried out under good quality control, and work efficiency can be improved, reducing construction time, and significantly improving safety and cost. Especially in the case of large-scale mock structures, safety, construction time, and cost are significantly improved. This will bring great benefits.

Next, as shown in FIG. 6, water 24 is stored in the upper part of the deflated membrane roof 23, which has been completely erected, and ropes 25,...
etc., to stabilize against the wind, and work on internal structures such as the bleachers S and internal facilities is carried out under the protection of the membrane roof 23.

Incidentally, in order to prevent water from accumulating more than necessary due to rain or the like in this state, a drain 26 may be provided at the center of the membrane surface, and the water overflowing from each grit may be drained by flowing downward to control it.

This internal work is completely unaffected by the weather, so
This greatly contributes to shortening the construction period.

[Brief explanation of the drawing]

Figures 1a and b and Figure 2 are explanatory diagrams of the conventional construction method, Figure 3 is an explanatory diagram of the membrane roof frame in the construction method of the present invention, and Figures 4a and b are diagrams of the membrane roof in the construction method of the present invention. A plan view and a side view of one jig used in the frame; Figures 5a and b are side and front views of a post used in the membrane roof frame in the construction method of the present invention; Figure 6 is a view of the interior in the construction method of the present invention. FIG. 2 is an explanatory diagram showing a mode of work. S...Seat, 8...Periphery frame, 9...Guide post, 10...Erection wire, 15...Membrane, 1
6...Ring beam, 23...Membrane roof, 25...
rope.

Claims (1)

[Claims] 1. Construction of the outer frame excluding the internal structures of the audience seats is carried out in advance, and the end of the wire is locked to the wire lifting guide post erected on the periphery of the frame, and the post is raised to a predetermined position midway, and this condition is maintained. Tightening the wire intersections and pasting the membrane are carried out on the ground. After completion, the wire is raised further and the wire end is pivotally assembled to the mounting bracket provided on the ring beam at the top of the structure. The posts were removed and the membrane roof construction work was carried out. After the construction of the membrane roof was completed, water was stored in the upper part of the deflated membrane surface, and a rope was strung between the lower surface of the center of the membrane surface and the ground. A construction method for an air membrane structure structure, which is stabilized against wind, and is characterized in that internal work on internal structures such as bleachers and internal facilities is carried out under the protection of such a membrane roof.