JPH1018651A - Construction method of double membrane roof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently install a double membrane roof on a structure that forms a large space. SOLUTION: A number of upper cables 30 are stretched between a peripheral ring truss 2 and a ring 10 of a central ring 6 at a predetermined angular pitch, and the upper cables 30 are used as support means to form an upper membrane 34. Then, a fan-shaped strip 36 is stretched (S1 to S3). Next, a number of lower cables 38 are stretched between the peripheral ring truss 2 and the ring 12 of the center ring 6 at a predetermined angular pitch, and a number of center cables are provided between the rings 10 and 12 of the center ring 6. Stretch 40. Then, using the lower cable 38 and the central cable 40 as support means, fan-shaped strip-shaped membrane pieces 44 and 48 forming the lower membrane 42 are stretched, respectively (S4 to S).
6). Thereafter, the air chamber 5 formed between the membranes 34, 42
The inside is filled with air to form a shape as a double membrane roof, and the whole is raised to a predetermined height (S7, S8).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for erection of a double membrane roof.

[0002]

2. Description of the Related Art In recent years, a method of forming a membrane roof by injecting air into a space under a membrane as an air membrane structure and maintaining the shape by the pressure has been applied to a structure that forms a large space such as various stadiums. Has been adopted. When such a membrane roof is erected, first construct a peripheral support structure, for example, in an annular shape, and then fix a number of supporting iron cables to the support structure, for example, inside the annular support structure. It is stretched radially and the membrane is stretched with these iron cords as support means. In this state, the membrane is still hanging down by gravity, but by injecting air into the closed space below the membrane inside the annular support structure, the membrane is inflated, for example, a dome-shaped roof is formed. Form.

In addition to forming a membrane roof with such a single membrane, it is also possible to form an air chamber by forming a double membrane and fill the air chamber with air to form a fixed shape. is there. Such a double membrane roof is used for small air tents, etc.When used as a tent, after deploying on the ground, filling gas between the membranes, forming a shape, The method of fixing or fixing first and then filling with gas is adopted.

[0004]

However, a double membrane roof having an air chamber has not been adopted for the roof of a structure that forms a large space such as a stadium, and a method of erection has been established. It has not been. Therefore, the object of the present invention is to
It is an object of the present invention to provide a method for erection of a double membrane roof for efficiently constructing a double membrane roof on a structure forming a large space.

[0005]

SUMMARY OF THE INVENTION The present invention achieves the above objects by providing an upper first membrane and a lower second membrane between upper, spaced apart outer membrane mounting frames of a structure. A method of erection of a double membrane roof formed by being filled with air in an air chamber comprising: constructing the outer membrane mounting frame on the ground, and connecting a plurality of upper iron cords between the outer membrane mounting frames. Stretching the first membrane using the upper iron cable as support means, and extending a plurality of lower iron cables between the outer membrane mounting frames below the first membrane; 2 is stretched using the lower iron cable as a support means, air is filled in an air chamber formed by the first and second membranes, and the outer membrane mounting frame is attached to the first membrane.
And the second membrane, the upper iron cable, and the lower iron cable are raised to a predetermined height.

[0006] In the present invention, the outer membrane mounting frame may be constructed in a ring shape, an inner membrane mounting frame may be constructed at an inner center of the outer membrane mounting frame, and a central portion of the upper iron cable and the lower iron cable. Wherein the inner membrane mounting frame is supported, and the inner membrane mounting frame is raised together when the first and second membranes, the upper iron cable, and the lower iron cable are raised.
The invention also provides that the outer membrane mounting frame is on a gantry,
The inner membrane mounting frame is constructed on another gantry arranged inside the gantry.

Further, according to the present invention, the inner membrane mounting frame includes a first and a second ring which are arranged at intervals in the vertical direction and are substantially parallel to each other with their centers substantially aligned with each other and connected to each other. The cable is connected to the first ring disposed above, and the lower iron cable is connected to the second ring disposed below. Also, the present invention
A plurality of second lower iron wires are connected to the first and second rings, respectively, and are stretched, and the second membrane is stretched at this point using the second lower iron wires as support means. It is characterized by being established.

In the present invention, when the first and second membranes are stretched, the first and second membranes extend in a direction in which the upper iron wire and the lower iron wire are stretched, and the upper iron wire and the lower wire are extended. A scaffold movable in a direction substantially perpendicular to the direction in which the iron cable is stretched is provided, and the scaffold is divided into a plurality in the direction in which the scaffold extends, and the height and inclination of each scaffold are individually adjusted. .

In the method of erection of a double membrane roof according to the present invention, after constructing an outer membrane mounting frame of the double membrane roof on the ground, a plurality of upper iron cables are connected between the outer membrane mounting frames and stretched. The first membrane is stretched using the upper iron cable as a supporting means. Further, a plurality of lower iron cords are connected and stretched between the outer membrane mounting frames, and the second membrane is stretched using the lower iron cords as support means. The air chamber formed by the first and second membranes thus stretched is filled with air to form a predetermined shape as a membrane roof, and the outer membrane mounting frame is formed by the first and second membranes. The membrane, the upper iron cable, and the lower iron cable are raised to a predetermined height by a conventionally known appropriate lifting means such as a jack. After raising,
This lifting means may be used as it is as a part of the building frame, or the outer membrane mounting frame may be removed from the lifting means and connected to the building frame side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a process diagram showing an embodiment of a method for erection of a double membrane roof according to the present invention, and FIG. 2 is a plan view showing an outer membrane mounting frame and an inner membrane mounting frame of a double membrane roof constructed according to this embodiment. 3 is an explanatory view showing a cable stretcher in this embodiment, FIG. 4 is an explanatory view showing installation of a scaffold, FIG. 5 is a side view showing the scaffold in detail, and FIG. It is explanatory drawing which shows laying.

As shown in FIGS. 2 and 3, the outer membrane mounting frame of the double membrane roof constructed according to the present embodiment, that is, the peripheral ring truss 2 is annular, and is mounted on a gantry 202 installed on the ground. It is constructed by assembling steel pipes 4 and the like. The diameter of the peripheral ring truss 2 is, for example, 130 m.
The height is about 20 m.

At the center of the inside of the peripheral ring truss 2, as shown in FIGS. 1 and 6, an inner membrane mounting frame, that is, a center ring 6 is constructed on a gantry 8. The diameter of the center ring 6 is, for example, about 35 m. The center ring 6 includes a ring 10 and a ring 12 having a larger diameter than the ring 10, which are vertically spaced and arranged substantially in parallel and substantially at the center, and are provided by a steel pipe 14 (FIG. 4) or the like. Linked to each other.

As shown in FIG. 2, between the peripheral ring truss 2 and the central ring 6, two annular rails 16 and 18 having different diameters are concentric with the central ring 6 and the peripheral ring truss 2. Is laid. The scaffold 20 is arranged on the rails 16 and 18 so as to be able to run in the extending direction of the rails 16 and 18 with the scaffold 20 extending in the radial direction starting from the center of the center ring 6. The scaffold 20 is shown in FIG.
As shown in FIG. 5, it includes a base 22 and a plurality of elevating units 24 mounted thereon. In this embodiment, three elevating units 24 are provided, which can be individually raised and lowered by jacks 26 mounted on the base 22, and the inclination can be adjusted.

Next, a procedure for erection of a double membrane roof according to the present invention will be described with reference to FIG. After constructing the peripheral ring truss 2 and the central ring 6 as described above (step S1), as shown in FIG. 3, the upper cable 30 (upper iron cable according to the present invention) is lifted by, for example, two cranes 28, Ring truss 2 at each end
And is connected to the ring 10 of the center ring 6 and stretched as shown by a dotted line (a). Then, a number of upper cables 30 are successively stretched radially around the central ring 6 at a constant angular pitch, for example, a pitch of about 15 ° (step S2).

Next, the elevating part 24 of the scaffold 20 is raised relatively high as shown on the left side of FIG. 4, and the elevating part 24 closer to the center is higher and the elevating part 24 closer to the center is more central ring 6 Tilt strongly toward the top of the In this state, the worker performs work on the elevating unit 24, and the operation proceeds to step S2.
The upper membrane 3 with the upper cable 30 stretched at
Then, a film piece 36 for forming 4 is stretched (step S3). The membrane piece 36 has, for example, a fan-like band shape, and has a central ring 6.
Extending along a radius line passing through the center of the When the work of stretching the membrane piece 36 at a certain place is completed, the scaffold 20 is moved on the rails 16 and 18 to a place where the membrane piece 36 is not yet mounted, and the stretch of the membrane piece 36 is similarly performed at that place. Perform installation work. Thereafter, by repeating this operation, the upper membrane 3 covering the entire area between the peripheral ring truss 2 and the central ring 6 is formed.
4 is completed.

Next, similarly to the case of the upper cable 30, the lower cable 38 (the lower iron wire according to the present invention) is lifted by, for example, two cranes, and both ends are respectively connected to the peripheral ring below the upper membrane 34. It is stretched around the inner edge 32 of the truss 2 and the ring 12 of the central ring 6. Then, a large number of lower cables 38 are sequentially stretched around the central ring 6 at a constant angular pitch, for example, at a pitch of about 15 ° (step S4). By stretching the upper cable 30 and the lower cable 38, the central ring 6 is supported inside the peripheral ring truss 2 via these cables 30, 38.

Further, the central cable 40 (the second lower iron wire according to the present invention) is lifted by, for example, a crane, and both ends are respectively placed inside the central ring 6 inside the ring 1.
Stretch on 0,12. Then, a large number of central cables 40 are sequentially stretched around the central ring 6 at a constant angular pitch, for example, at a pitch of about 15 ° (step S5).

Thereafter, the elevating part 24 of the scaffold 20 is set at a relatively low position as shown on the right side of FIG.
4 as high as the inner edge 32 of the peripheral ring truss 2
At an almost constant angle toward. In this state, as shown in FIG. 5, the worker performs work on the elevating unit 24,
Using the lower cable 38 stretched in step S4 as a supporting means, a membrane piece 44 forming the lower membrane 42 is stretched (step S6). The membrane piece 44 also has a fan-shaped band shape, for example.
It extends along a radial line passing through the center of the center ring 6. When the work of stretching the film piece 44 at a certain location is completed,
The scaffold 20 is moved on the rails 16 and 18 to a position where the membrane piece 44 has not yet been mounted, and at that position, the membrane piece 4 is similarly moved.
Perform the stretching work of 4.

At the location of the central cable 40, FIG.
As shown in (1), a scaffold 46 is constructed on the gantry 8, and the membrane pieces 48 constituting the lower membrane 42 are sequentially stretched using the central cable 40 as a support means in the same manner as described above. Thereafter, by repeating these operations, the lower film 42 covering the entire area between the peripheral ring truss 2 and the central ring 6 is formed.
Complete the installation. Thereafter, the joint of the membranes 34, 42 is closed by a conventionally known means to form an air chamber 50 between the membranes 34, 42, and the air chamber 50 is filled with air to form a double membrane roof. Is formed (step S7). Then, the double membrane roof is lifted up to a predetermined height by a jack, and the peripheral ring truss 2 is connected to the top of the column 204 forming a part of the building frame, thereby completing the installation of the double membrane roof (Step S).
8).

According to the double membrane roof erection method of the present embodiment, the double membrane roof erection of a structure forming a large space such as a stadium can be performed in a certain order and in an orderly and skillful manner. , Efficient installation work can be realized. Further, in the method of erection of the double membrane roof of the present embodiment, since it can be constructed before or after constructing a peripheral frame such as a wall of a structure on which the double membrane roof is erected, It is possible to widely cope with construction plans according to the specifications of various structures, greatly shorten the construction period, and is advantageous in reducing costs. In particular, if the double membrane roof is erected according to the present invention before constructing the peripheral frame, various other operations can be performed under the double membrane roof without being affected by rainy weather, and in order to shorten the construction period. It is more advantageous. Also, after constructing the peripheral skeleton, if the double membrane roof is erected according to the present invention, pulleys and the like are installed at the top of the peripheral skeleton,
For example, the double membrane roof can be raised by a hoisting machine or a wire installed on the ground, so that the range of options for raising the double membrane roof is wider, which is more advantageous in reducing costs.

In the embodiment, the double membrane roof using the center ring 6 (the inner membrane mounting frame) has been described. However, the present invention is also applied to a double membrane roof having no center ring 6. The shape in plan view is not limited to a circular shape as in the embodiment, but may be applied to other shapes such as a rectangle.

[0022]

As described above, the present invention provides an air chamber comprising an upper first membrane and a lower second membrane between upper and lower outer membrane mounting frames of a structure. A method of erection of a double membrane roof, which is formed by being filled with air, constructs the outer membrane mounting frame on which a double membrane roof is erected on the ground, and attaches a plurality of upper iron cables to the outer membrane. The first membrane is stretched between the frames, the first membrane is stretched using the upper iron cable as a support means, a plurality of lower iron cables are stretched between the outer membrane mounting frames, and the second membrane is A lower iron cord is stretched as a support means, air is filled in an air chamber formed by the first and second membranes, and the outer membrane mounting frame is connected to the first and second membranes by the upper side. Configuration to rise to a predetermined height together with the iron cable and the lower iron cable It was. As a result, the construction of a double membrane roof for a structure that forms a large space such as a stadium can be executed in a certain order and skillfully, and the structure where the double membrane roof is constructed The work can be performed before or after the peripheral frame such as the wall is constructed, the construction period can be greatly reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a process diagram showing an embodiment of a method for erection of a double membrane roof according to the present invention.

FIG. 2 is a plan view showing an outer membrane mounting frame and an inner membrane mounting frame of a double membrane roof constructed according to the present embodiment.

FIG. 3 is an explanatory view showing a cable stretcher in the present embodiment.

FIG. 4 is an explanatory diagram showing installation of a scaffold.

FIG. 5 is a side view showing the scaffold in detail.

FIG. 6 is an explanatory view showing installation of a scaffold including a center ring portion and installation of a membrane.

[Explanation of symbols]

 2 Peripheral ring truss 6 Central ring 10, 12 Ring 20, 46 Scaffold 30 Upper cable 34, 42 Membrane 36, 44, 48 Membrane piece 38 Lower cable 40 Central cable 50 Air chamber

Claims (6)

[Claims] 1. An upper first membrane and a lower second membrane between an outer membrane mounting frame at a distance from each other on an upper portion of the structure.
A method of erection of a double membrane roof formed by filling air into an air chamber made of a membrane, wherein the outer membrane mounting frame is constructed on the ground, and a plurality of upper iron wires are connected to the outer membrane mounting frame. Stretching the first membrane using the upper iron cable as a support means, stretching a plurality of lower iron cables below the first membrane between the outer membrane mounting frames, The second membrane is stretched using the lower iron cable as a support means, and air is filled in an air chamber formed by the first and second membranes. A method of erection of a double membrane roof, comprising raising the second membrane, the upper iron cable, and the lower iron cable to a height corresponding to an upper part of the structure. 2. The outer membrane mounting frame is constructed in an annular shape, and an inner membrane mounting frame is constructed in the center of the inner side of the outer membrane mounting frame, and the inner membrane is mounted at a central portion of the upper iron cable and the lower iron cable. 2. The mounting frame of claim 1, wherein a mounting frame is supported, and wherein the inner membrane mounting frame is raised together when the outer membrane mounting frame, the first and second membranes, the upper iron cable, and the lower iron cable are raised. How to build a multi-layer roof. 3. The method according to claim 2, wherein the outer membrane mounting frame is constructed on a gantry, and the inner membrane mounting frame is constructed on another gantry arranged inside the gantry. . 4. The inner membrane mounting frame includes first and second rings arranged vertically and substantially parallel to each other and substantially parallel to the center and connected to each other, and the upper iron cable extends upward. The method of erection of a double membrane roof according to claim 2 or 3, wherein the method is connected to the arranged first ring, and the lower iron cable is connected to the second ring disposed below. 5. A plurality of second lower iron cords are connected to the first and second rings, respectively, and are stretched, and the second membrane is formed at this point by the second lower iron cords. 5. The method of erection of a double membrane roof according to claim 4, wherein the roof is stretched as a support means. 6. When the first and second membranes are stretched, the first and second membranes extend in a direction in which the upper iron cable and the lower iron cable are stretched, and the upper iron cable and the lower iron cable are tensioned. 6. A scaffold movable in a direction substantially orthogonal to the installation direction is provided, and the scaffold is divided into a plurality in a direction in which the scaffold extends, and each of the scaffolds is individually adjusted in height and inclination. The method of erection of the double membrane roof described in the item.