JP3623553B2 - Bag-like structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag-like structure that is installed at the bottom of a water and used as a weir, a breakwater, etc., in particular, the expansion and contraction deformation of a band-shaped flexible membrane body, in other words, the flow of water by standing and lodging operations, It effectively prevents wave propagation.
[0002]
[Prior art]
A conventional bag-like structure of this type is illustrated in FIG.
This is a band-shaped flexible film body F having a certain width fixed to the mounting surface I of the mounting base B, which is substantially horizontal as a whole, in an airtight or liquid-tight manner at both sides and both ends thereof. Such a bag-like structure is supplied with a pressurized fluid between the installation surface I and the belt-like flexible film body F, for example, when the bag-like structure is installed on the riverbed, so that the belt-like flexible film body F is shown in FIG. By expanding as shown in (b), it is possible to contribute to water damming and the like. On the other hand, by discharging the pressurized fluid, all of the dammed water can flow down.
[0003]
[Problems to be solved by the invention]
By the way, in such a conventional technique, when the central portion in the length direction of the strip-shaped flexible film body F is expanded into a semicircular shape having a height H as shown by a schematic diagram in FIG. The fixed width of the strip-shaped flexible film body F is 2H, and the required width of the strip-shaped flexible film body itself is 3.14H. Therefore, in order to fix both end portions of the strip-shaped flexible film body F on the horizontal installation surface I in an airtight or liquid-tight manner over the entire width thereof, the end portions of the strip-shaped flexible film body F are directed toward the edge. Thus, it is necessary to gradually widen the fixing width to the installation surface I in a fish-tilt shape as shown in the figure, and according to such a fixing mode of the strip-shaped flexible film body F, The protruding height will inevitably decrease as the fixed width increases.
[0004]
For this reason, in this prior art, as shown in FIG. 7 (a), the width of the installation surface I, in turn, the mounting base, for fixing the belt-like flexible film F, particularly the end portion thereof, is fixed. Increasing the width dimension of B is inevitable, and when installing this structure, there is a problem in that the installation surface is maintained and the area of the base portion is increased, and the band-shaped flexible film body F is expanded. As shown in FIG. 7 (b), there is a problem in that the amount of water dammed is small because the height of the water is drastically lowered at both end portions as compared with the other portions.
[0005]
The present invention was made as a result of studying as a subject to solve such problems of the prior art, and an object of the present invention is to fix the fixing width of the strip-shaped flexible membrane body at the end portion thereof. Therefore, the width dimension of the mounting base can be effectively reduced, and the swollen height of the strip-shaped flexible film body from the horizontal installation surface portion can be set to the end portion thereof. In the present invention, for example, a bag-like structure capable of effectively increasing the level of water blocking is provided.
[0006]
[Means for Solving the Problems]
The pouch of the present invention, particularly, a mounting surface of a flat belt flexible film having a constant width over the entire length, and a horizontal portion for fixing a large portion including the central portion of the belt-shaped flexible film member Each of the upwardly inclined surfaces for fixing the respective end portions of the belt-like flexible membrane body, and each of the upwardly inclined portions at the fixing position corresponding to the end portion of the belt-like flexible membrane body. Absorbing the surplus width of the film body, preferably a curved uneven surface is provided, and both sides of the belt-like flexible film body are fixed in parallel to each other in plan view over their entire length.
[0007]
Thus, here, the fixed width of the band-shaped flexible membrane body is made constant over its entire length by absorbing the surplus width at the end of the band-shaped flexible membrane body by the uneven surface provided on the installation surface. Therefore, the width dimension of the mounting base that forms the installation surface can be made sufficiently small. For this reason, when installing the installation base, the installation surface (sea floor, etc.) is maintained and the area of the foundation is naturally reduced. I can do things.
[0008]
The contour shape of the concavo-convex surface here may be angular, but if it is a curved surface, the end of the strip-shaped flexible membrane body is fixed and the strip-shaped flexible membrane body is moved to the strip-shaped flexible membrane body. The local stress concentration can be effectively avoided, and the durability of the strip-shaped flexible film body can be enhanced.
[0009]
Further, in this bag-like structure, as described above, by fixing the fixing width of the belt-like flexible membrane body over the entire length thereof, the belt-like flexible membrane body is bulged and deformed sufficiently high until reaching the end. In addition, by fixing the end portion of the strip-shaped flexible film body to the upward inclined portion of the installation surface, the position of the end portion itself can be increased, so that the expansion of the strip-shaped flexible film body Sometimes, for example, the level of water damming at the end of it can be brought to a much higher position than in the prior art, and almost the entire length of the strip-shaped flexible membrane body is effective for water damming etc. Can contribute.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a view illustrating an embodiment of the present invention, in which 1 indicates a mounting base and 2 indicates a mounting surface of a belt-like flexible membrane body provided on the mounting base 1.
[0011]
Here, the installation surface 2 includes a horizontal portion 4 that fixes a large portion including the central portion of the strip-shaped flexible film body 3 having a constant width, and a continuous portion of the strip-shaped flexible fluid 3 that continues to the horizontal portion 4. Each upwardly inclined portion 5 that fixes the end portion, and each upwardly inclined portion 5 that forms an angle of about 45 ° with respect to the horizontal plane is at a position corresponding to the end portion of the strip-shaped flexible film body 3. In addition, the belt-like flexible film body 3 has an uneven surface 6 that absorbs the excess width.
[0012]
FIG. 1B is a sectional view taken along the line bb in FIG. 1A, showing the uneven surface 6 in a state where the end of the belt-like flexible film body 3 is fixed thereto. Then, the uneven surface 6 is a curved uneven surface integrally formed with the mounting base 1. Incidentally, the length of the inclined portion 5 in the vertical direction of such an uneven surface 6 can of course be the minimum necessary for fixing the belt-like flexible film body 3. Can be made to extend over a required length in the vertical direction and gradually disappear. In particular, according to the latter, the form of the strip-shaped flexible film body 3 when contracted can be made sufficiently smooth.
Further, as shown in the drawing, the embedded bolt 7 is projected from the respective positions of the bottom and top of each uneven surface of the uneven surface 6 so that the belt-like flexible film body 3 can be attached thereto.
[0013]
In addition, although the uneven surface 6 is formed on the surface of a protrusion 8 made of the same material as the mounting base 1, for example, mortar, cement, etc., the protrusion 8 is shown in FIG. As shown, it can be made of a material different from that embedded in the mounting base 1, and the protrusion 8 is formed separately from the mounting base 1 and is connected via an anchor bolt or the like. It can also be fixed to the mounting base 1 afterwards. Further, in both the case where the protrusion 8 is embedded and the case where the protrusion 8 is configured separately, the protrusion 8 can be formed of a hollow frame-like body. By sealing, airtightness or liquid tightness can be sufficiently secured.
[0014]
The band-shaped flexible film body 3 can be hermetically or liquid-tightly fixed to the installation surface 2 configured as described above, for example, by a band-shaped flexible film having a constant width of approximately 3.14H with respect to the fixed width 2H. Both sides of the flexure body 3 are fixed to each other in the horizontal portion 4 and the upward inclined portion 5 through the anchor bolts protruding from the mounting base 1 in parallel with each other in a plan view over the entire length thereof. And each end part of the strip | belt-shaped flexible film body 3 is fixed on each uneven | corrugated surface 6 through the embedded volt | bolt 7, for example.
[0015]
Here, the fixing of the portions other than the end portions of the strip-shaped flexible film body 3 is performed with respect to the respective anchor bolts 9 protruding from the installation surface 2 as illustrated in the schematic cross-sectional view of FIG. It can be performed by screwing the nuts 12 to the respective anchor bolts 9 in a state in which the metal fitting 10, the belt-like flexible film body 3 and the upper holding metal fitting 11 are sequentially fitted. For example, as shown in FIG. 1B, the end portion is fixed on the belt-like flexible film body 3 fitted to the embedded bolt 7 so as to have a shape corresponding to each concave portion and convex portion of the concave and convex surface 6. At the same time, it can be carried out by screwing the nuts 12 to the respective embedded bolts 7 in a state in which the respective presser fittings 13a, 13b located in contact with each other are disposed. Here, the reason that the presser fittings 13a and 13b are divided into respective concave portions and convex portions is to make the deformation of the belt-like flexible film body 3 accurately following the concave and convex surface 6 sufficiently easy. is there. Therefore, as long as the deformation can be easily performed, one presser fitting can be formed into a shape corresponding to one or a plurality of concave portions and convex portions.
Further, in the embodiment shown in FIG. 1B, the presser fittings 13a and 13b are shaped so that their upper surfaces are aligned in the same plane, but the presser fittings 13a and 13b are, for example, As illustrated in FIG. 4, the shape can be curved along the uneven surface 6.
[0016]
As shown in FIG. 1 (a), the strip-shaped flexible film body 3 fixed to the installation surface 2 in this way is on the installation surface particularly with a slight wrinkle at the center as shown in FIG. While allowing contact and free flow of water or the like on the strip-shaped flexible membrane body, supply of pressurized fluid between the installation surface 2 and the strip-shaped flexible membrane body 3 causes that to flow as shown in FIG. As shown in Fig. 2, when the water rises and rises, it effectively blocks or restrains the flow of water or the like regardless of whether or not it is exposed on the water surface.
[0017]
FIG. 6 is a schematic front view showing such an expanded state of the strip-shaped flexible membrane body 3 in contrast with the expanded state of the conventional strip-shaped flexible membrane body F. According to this, in the prior art, In the embodiment of the present invention, the damming level is drastically lowered from the end portion position of the belt-like flexible film body F in the expanded posture toward the end edge from the end portion position of about 1.5 H from the end edge. According to the present invention, the area where the damming level is lowered can be reduced to the range from the edge position of the belt-like flexible film body 3 to the end portion position of about 0.5 H, and the damming The degree of decrease in the level can also be effectively reduced under the selection of the inclination angle of the upward inclined portion 5 and the fixed height of the strip-shaped flexible film body 3 to the inclined portion 5.
[0018]
Thus, according to this bag-like structure, as described above, the width dimension of the mounting base 1 can be effectively reduced, and at the same time, the damming level of the end portion of the strip-like flexible film body 3 is sufficiently increased. Can be increased.
[0019]
Although the present invention has been described based on the illustrated example, the contour shape of the concavo-convex surface may be a trapezoidal shape or other square shapes.
[0020]
【The invention's effect】
According to the present invention, the width of the mounting base can be effectively reduced as compared with the prior art by fixing both sides of the belt-like flexible membrane body in parallel with each other in plan view over the entire length thereof. When installing the base, it is possible to reduce the maintenance of the installation surface and the area of the foundation.
In addition, since the weir level of water or the like at the end portion of the strip-shaped flexible membrane body can be effectively increased in combination with the action of the upward inclined portion, the component of the upward inclined portion of the mounting base It is possible to block a larger amount of water, including water, and to more effectively prevent wave propagation over a wider range.
[0021]
Furthermore, since it becomes unnecessary here to fix a strip | belt-shaped flexible film body to a fish till, its installation construction becomes easy and easy.
In addition, by fixing the end of the strip-shaped flexible membrane body to the upward inclined portion at a position higher than the horizontal portion of the installation surface, the force acting on the end when the strip-shaped flexible fluid is expanded is effectively reduced. Thus, the durability of the strip-shaped flexible film body can be enhanced.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing another example of fixing the end portion of the strip-shaped flexible membrane body.
FIG. 3 is a cross-sectional view showing an example of fixing a side portion of a strip-shaped flexible membrane body.
FIG. 4 is a cross-sectional view showing another example of a presser fitting.
FIG. 5 is an inclined view illustrating the expanded state of the belt-like flexible membrane body by partially removing the ruptured portion.
FIG. 6 is a schematic front view showing the expansion modes of the belt-like flexible membrane body of the embodiment and the conventional strip-like flexible membrane body in comparison.
FIG. 7 is a schematic plan view and a front view showing a conventional example.
FIG. 8 is an explanatory diagram showing the relationship between the width and the like of the belt-shaped flexible film body and the fixed width.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting base 2 Installation surface 3 Strip | belt-shaped flexible film body 4 Horizontal part 5 Upward inclined part 6 Uneven surface 7 Embedded bolt 8 Protrusion 9 Anchor bolt 10 Lower presser fitting 11 Upper presser fitting 12 Nut 13a, 13b Presser fitting

Claims (2)

A flat strip flexible film having a constant width over the entire length, with sides and both ends of it, will be fixed in an airtight or liquid-tight to the mounting surface, between the belt-like flexible membrane body and the installation surface A bag-like structure that causes expansion and contraction deformation of the belt-like flexible membrane by supplying and discharging fluid to and from the bag,
The installation surface is composed of a horizontal portion that fixes a large portion including the central portion of the strip-shaped flexible membrane body, and an upwardly inclined portion that fixes each end portion of the strip-shaped flexible membrane body,
An uneven surface for absorbing the excess width of the band-shaped flexible film body is provided at the fixing position of each upward inclined portion corresponding to the end of the band-shaped flexible film body,
A bag-like structure formed by fixing both side portions of the belt-like flexible membrane body in parallel with each other in plan view over their entire length. The bag-like structure according to claim 1, wherein the uneven surface is a curved uneven surface.

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