JPH10110416A - Filling pressure reducing type membrane structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen an application range by compacting a filling substance in a bag body by pressure reduction of the bag body airtightly formed by means of a membrane material, and holding structural shape in accordance with desired shape. SOLUTION: A bag 2 having airtightness of arch shape, house shape, mountain shape or trapezoid shape is formed. The bag 2 is filled with lightweight powdery granules 3 such as e.g. low foam synthetic resin beads, the inside of the bag 2 is pressure-reduced, and the powdery granules 3 are compacted to form a membrane structural body. For instance, in the case where embankment protection construction is executed, the trapezoid shape bag 2 is filled with sand-bags, and the inside of the bag 2 is pressure-reduced to compact the sand-bags. Thereby strength of a structural element can be improved, quick construction is enabled and utilization can be performed in wide application.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure suitable for use as a structural element such as a pillar, a beam, or an arch in a temporary building, and a structure suitable for functioning as a sandbag in civil engineering work. The present invention relates to a film structure using a film material.

[0002]

2. Description of the Related Art For example, an airtight sheet material formed by coating a coating material such as a fluororesin or a vinyl chloride resin on a cloth made of glass fiber or synthetic resin fiber, or a synthetic resin material or a rubber material is used. A film material typified by an airtight sheet material has been widely used as a tent structure or a roof material for a dome structure. However, none of these are used as structural elements such as columns and beams. As an example of using a film material as a structural element, there is a so-called tube structure (or inflated structure).

[0003] The tube structure is obtained by inflating a bag formed of a film material into a desired shape by pneumatic pressure to form, for example, an arch or a beam, and exerts its structural strength by pneumatic pressure.
For this reason, for example, there is a great advantage in that the construction of the structural elements of the temporary structure can be quickly performed. In addition, there are advantages such as lightness and ease of handling, and ease of transportation by removing air when transporting. There is also. Therefore, it is highly useful as a structural element of a temporary structure requiring quick construction such as an emergency shelter. However, there is naturally a limit to the structural strength due to air pressure, and to obtain a high strength, it is necessary to increase the tensile strength of the film material accordingly, resulting in a large cost increase. For this reason, there remains a problem that the range of possible uses is limited.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the usefulness of a film material as a structural element in a temporary structure or the like as described above. It is an object of the present invention to improve strength and make it possible to utilize the above-mentioned advantages of using a film material as a structural element for a wider range of applications.

[0005]

According to the present invention, for this purpose, a film structure is formed from a bag having a desired shape formed airtight using a film material and a filling material filled in the bag. Then, the packing is compacted by the reduced pressure in the bag to maintain the structural shape corresponding to the desired shape of the bag.

[0006] Such a membrane structure according to the present invention exhibits structural strength because the packing is tightly compressed and compacted by the reduced pressure in the bag. For this reason, much higher structural strength can be obtained as compared with the conventional tube structure that obtains structural strength by air pressure. This makes it possible to widen the range of use of the structural element using the film material, and also to reduce the cross-sectional size of the structural element. Further, the membrane structure of the present invention, which exerts structural strength by compacting the filling material, requires a relatively small strength of the membrane material itself to obtain a large strength as a structural element. That is, it is possible to avoid an increase in cost due to the increase in strength. Further, the membrane structure according to the present invention can exert the above-mentioned advantages in the tube structure basically, although an operation of filling the bag into the bag is added when the membrane structure is formed. Therefore, according to the membrane structure of the present invention, for structural elements such as temporary structures, there is an advantage that the structural elements can be quickly constructed and an advantage that they are light, easy to handle, and easy to transport. It can be widely used, and by reducing the cross-sectional size, it is possible to increase the use efficiency of the temporary structure and the like.

[0007] As the filler of the above membrane structure,
For example, a granular material such as a synthetic resin pellet or glass beads can be used. The use of such a granular material as a filler is particularly suitable for use as a structural element such as a temporary structure.

[0008] As a filler for the membrane structure as described above, for example, a block such as a sandbag filled with earth and stone can be used. For example, a membrane structure with sandbags as a filler, a large number of sandbags will exhibit structural strength in a unitary manner, and can exhibit a significantly greater protective capacity than simply stacking sandbags, It is suitable for embankment protection in emergencies and for supporting debris in civil engineering work.

[0009]

Embodiments of the present invention will be described below. As shown in FIG. 1, a membrane structure 1 of a pressure-reduction type according to an embodiment of the present invention has an arch shape. This membrane structure 1
As shown in FIG. 2 showing the cross section, an airtight bag 2 formed in an arch shape with a film material is filled with a light-weight granular material 3 such as a low-foaming synthetic resin bead, and then It is formed by depressurizing the inside of the bag 2 and compacting the powder 3. The filling of the granular material 3 can be performed at a construction site of a temporary structure or the like, but is generally performed in advance at a factory or the like. In the case of on-site filling, an appropriate filling port is provided in the bag, and the powder is filled from this filling port using a hose or the like. In any case, it is preferable that the degree of filling of the granular material is loosened so that the material can be easily bent without applying a reduced pressure treatment. On the other hand, decompression of the bag 2 is performed by connecting a vacuum pump or the like at a construction site to a suction port (not shown) provided in the bag 2. The structural strength of such a membrane structure is mainly given by the degree of decompression and the hardness of the filler, and the compaction property of the filler. In particular, the degree of decompression occupies a large specific gravity. be able to.

FIGS. 3 and 4 show membrane structures 11 and 12 according to another embodiment of the present invention. The membrane structure 11 shown in FIG. 3 can be used in a temporary building or the like. In the example shown in FIG. 4, the membrane structure 12 shown in FIG. These film structures 11 and 12 are the same as in the above embodiment except for the structural shape.

In one embodiment in which the present invention is used for embankment protection, as shown in FIG.
Will be installed along the embankment T. This membrane structure 2
1 is formed by packing a large number of sandbags 23 into a trapezoid-shaped bag 22 and then depressurizing the inside of the bag 22 to compact the sandbag 23.

[0012]

As described above, according to the present invention, a structural element utilizing a membrane material has advantages such as rapid construction of structural elements and advantages such as light weight, easy handling, and easy transportation. Can be used in a wider range of applications, and its functionality can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a membrane structure according to one embodiment.

FIG. 2 is a sectional view taken along the line SA-SA in FIG.

FIG. 3 is a side view of a film structure according to another embodiment.

FIG. 4 is a side view of a film structure according to still another embodiment.

FIG. 5 is a cross-sectional view schematically illustrating an embodiment of a membrane structure used for bank protection.

[Explanation of symbols]

 1,11,12,21 Membrane structure 2,22 bags 3 Granules (fill) 23 Sandbags (fill)

Claims (3)

[Claims] 1. A film structure comprising a bag having a desired shape formed airtight using a film material and a filling material filled in the bag, wherein the filling material is compacted by reducing the pressure in the bag. A film structure of a filling and depressurizing type, wherein a structure shape according to the desired shape of the bag is maintained. 2. The membrane structure according to claim 1, wherein the filler is a granular material. 3. The membrane structure according to claim 1, wherein the filler is a block such as a sandbag.