JP4138464B2 - Seawall / breakwater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tide / breakwater.
[0002]
[Prior art]
7 to 10 show the structure of a conventional tide and breakwater. In the conventional tide and breakwaters, the breakwaters 3R and 3L, which are placed facing the sea on both sides of the river at the boundary between the sea side and the river side, are anchorage 2R at opposite positions facing each other on both sides of the river. 2L is provided, and the membrane structure 1 serving as a shield that opens and closes the water channel whose entrance is restricted by the breakwaters 3R and 3L is provided.
As shown in FIGS. 9 and 10, in this membrane structure 1, a plurality of cable wires 1b receiving axial rigidity resistance are arranged at predetermined intervals in the vertical direction (water depth direction) to support each cable wire 1b. Preferably, a plurality of beam members 1c (steel material, resin material, etc.) are provided to extend in the water depth direction at positions separated by a predetermined distance in the longitudinal direction of the cable wire 1b and are orthogonal to each cable wire 1b. The member 1c is locked, and a film member 1a formed of a material such as a Teflon (registered trademark) film, an aramid fiber, or FRP is locked to the sea side so as to stick to the sea side, thereby constituting a tension structure.
[0003]
When the water channels whose entrances are restricted by the left and right breakwaters 3R, 3L are closed, as shown in FIG. 7, the membrane structure expanded from the tidal current is subjected to water pressure from the direction of the arrows.
The water pressure in the cross section is supported by the membrane member 1a, the tensile force in the axial direction (water channel width direction) generated by the water pressure is received by the cable wire 1b, and the reaction force (to counter the tensile force ( An arrow in the figure is supported by anchorages 2R and 2L (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2000-282434 A (page 3, FIG. 1)
[0005]
[Problems to be solved by the invention]
The conventional tide and breakwater constructed as described above is desired to have a structure that can be opened and closed in a minimum amount of time in consideration of the fact that the part to be closed is a channel. However, since the membrane structure must be attached to the anchorages 2R and 2L while receiving water pressure, there is a problem that the operation is not easy and takes time.
[0006]
Moreover, when performing the operation | work which closes a water channel, it is difficult to prevent the water leak between the cable wire 1b edge part and anchorage 2R, 2L, and it takes time for water leakage prevention work, and time for the work which closes a water channel is time-consuming. There was a problem that it took.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tide / breakwater that can prevent water leakage from the end and shorten the opening and closing time.
[0010]
[Means for Solving the Problems]
The tide and breakwater according to claim 1 is provided with foundations on both sides of the water channel, and between the foundations on both sides, the ends are locked to the foundations and extend over the entire depth direction in the width direction. A membrane structure extending between the foundations on both sides is provided, the membrane structure being provided at the end of one side surface of the membrane body, the cable provided along the longitudinal direction of the membrane body, and the membrane body; An auxiliary membrane member extending in the longitudinal direction from the end of the membrane body is provided, and the combined length of the membrane body and the auxiliary membrane member is longer in the longitudinal direction than the cable, and both ends of the cable are fixed to the foundation. When the auxiliary membrane member is pressed against the foundation by water pressure, water leakage is prevented, and conversely, when the auxiliary membrane member is detached from the foundation and a gap is generated, water is allowed to escape .
[0011]
In the present invention, the gap formed between the cable end and the foundation is covered by the film body portion longer than the cable. Accordingly, water leakage can be surely prevented without special treatment, and the installation work time is shortened.
[0012]
The tide / breakwater according to claim 2, wherein the auxiliary membrane member covers a gap between the cable and the foundation, and the foundation is provided with a support member for supporting the end of the membrane structure from the back side. It is characterized by being.
The tide / breakwater according to claim 3 is characterized in that the support member is formed of a smooth concave curved surface on the side supporting the membrane structure.
[0013]
In the present invention, when the membrane structure and the support member are in close contact with each other, it is possible to prevent water leakage that solves the gap generated between the cable end and the foundation. Accordingly, water leakage can be surely prevented without special treatment, and the installation work time is shortened.
[0014]
Tide-breakwater according to claim 4, before Kimaku structure, divided into the left and right at the center, characterized in that it is fixable.
[0015]
In the present invention, a membrane structure having a half length from both sides is spread to the center of the water channel by towing or the like and fixed to each other. Since the length is halved, it takes less time to spread than before.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to the drawings. In addition, about the structure same as the past, the same code | symbol is used and the description is abbreviate | omitted.
FIG. 1 shows a seawall of this embodiment, and reference numeral 1b is a cable wire. Other configurations (membrane member 1a and the like) are omitted.
As shown in the figure, both ends of the cable wire 1b that are adjacent to each other are gathered and fixed to the anchorages 2R and 2L at one place. Each cable wire 1b is fixed to the membrane member 1a in a state where a smooth curve is drawn.
By being configured in this way, it is possible to attach several cables together rather than attaching each cable to the foundation, thereby shortening the time required for the installation work.
Note that the ends of the cable wires 1b may be grouped in two as in the above example, or more than that.
[0017]
Next, a seawall according to a second embodiment of the present invention will be described with reference to the drawings. In addition, about the structure same as the past, the same code | symbol is used and the description is abbreviate | omitted.
The seawall in this embodiment is provided at the boundary between the inside and outside the port.
In FIG. 2, reference numeral 5 denotes a hook provided at the end of the cable wire 1b. The cable wire 1b is configured to be shorter than the membrane member 1a. That is, the surplus portion 6 of the membrane member 1a is formed outside the cable wire 1b in the longitudinal direction.
2, the length of the membrane member 1a may be longer than that of the cable wire 1b. As shown in FIG. 3, the end of the membrane member 1a may be placed on one end of the membrane member 1a. The auxiliary membrane member 7 extending in the longitudinal direction may be provided so that the combined length of the membrane member 1a and the auxiliary membrane member 7 is longer than that of the cable wire 1b.
In the seawall of this embodiment configured as described above, as shown in FIG. 4, the hook 5 is locked to the locking fitting 10 provided on the anchorage 2R, 2L. Then, the surplus portion 6 of the membrane member 1a or the auxiliary membrane member 7 covers the gap between the cable wire 1b and the anchorage 2R, 2L, and is pressed against the anchorage 2R, 2L by the water pressure, and the water from the outside of the port to the inside of the port Leakage is prevented. On the other hand, when the water level inside the port becomes higher than the outside of the port, the surplus portion 6 or the auxiliary membrane member 7 separates from the anchorage 2R, 2L, and a gap is generated, so that the water in the port is released outside the port. Can do.
As described above, in this embodiment, water leakage can be easily prevented without performing any special treatment, so that the installation work is shortened.
[0018]
Further, as shown in FIG. 2, when the membrane member 1a longer than the cable wire 1b is attached, the membrane member 1a is pressed against the anchorages 2R and 2L at both ends by water pressure, thereby causing water leakage from both ends of the cable wire 1b. Is prevented. Actually, since the load acting on the cable wire 1b is large, the hook 5 may be very large, and the section where the membrane member 1a and the cable wire 1b are not joined becomes long, preventing water leakage. Therefore, it is necessary to make the membrane member 1a sufficiently long.
[0019]
Further, as shown in FIG. 3, the membrane member 1a is divided into a membrane member 1a and an auxiliary membrane member 7, and the membrane member 1a attached to the cable wire 1b is set to be slightly shorter, and the auxiliary membrane member 7 on the anchorage 2R, 2L side. Since the auxiliary membrane member 7 is shorter than the membrane member 1a, the degree of freedom is restricted, and the auxiliary membrane member 7 is easily stuck to the membrane member 1a, so that water leaks between the membrane member 1a and the auxiliary membrane member 7. Can be reduced. Further, by shortening the length of the membrane member 1a, the handleability of the cable wire 1b is facilitated, and the extension time can be shortened.
[0020]
As a modification, the configuration may be as shown in FIG. The anchorage 2R, 2L is provided with a support member 11 that supports the membrane structure 1 from the back. The membrane structure 1 side of the support member 11 is constituted by a smooth concave curved surface 11a.
By being configured in this way, when the membrane structure 1 is pressed against the support member 11 by water pressure, the membrane structure 1 is in close contact with the support member 11 and can prevent water leakage from the port outside to the port inside.
[0021]
Next, a third embodiment of the present invention will be described with reference to the drawings. In addition, about the structure same as the past, the same code | symbol is used and the description is abbreviate | omitted.
As shown in FIG. 6, a column 15 is provided at the center of the water channel. The membrane structure 1 is divided into left and right at the center, and can be attached to and detached from the column 15 respectively.
In the present embodiment configured as described above, the membrane structure 1 is expanded as follows. The ends of the left and right membrane structures (referred to as 1-1 and 1-2, respectively) are moved from both banks to the center of the waterway by a towed ship (see FIG. 8). Then, the film structures 1-1 and 1-2 are fixed to the column bodies 15, respectively.
By constructing in this way, the film structures 1-1 and 1-2 having a length half that of the prior art are stretched, so that the stretching work can be shortened as compared with the prior art.
[0022]
It should be noted that the place to which each embodiment is applied is not limited to the boundary between the inside and outside of the port, but may be any place (river, canal, etc.) as long as it is a waterway.
Moreover, it is also possible to apply the seawall of each said embodiment as a breakwater.
Furthermore, it goes without saying that the above embodiments may be used in appropriate combination.
[0023]
【The invention's effect】
As described above, the following effects can be obtained in the present invention .
According to the first to third aspects of the invention, water leakage can be reliably prevented without performing special treatment, so that the mounting operation is simplified and the working time can be shortened.
According to the fourth aspect of the present invention, since the film structure having a length half that of the prior art is stretched, the stretching work can be shortened as compared with the prior art.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a seawall shown as a first embodiment of the present invention.
FIG. 2 is a partially enlarged view showing an end portion of a membrane structure used for a seawall shown as a second embodiment of the present invention.
FIG. 3 is a partially enlarged view showing a modification of the membrane structure.
FIG. 4 is a partially enlarged view of a seawall showing the use state of the membrane structure.
FIG. 5 is a partially enlarged view of a seawall showing a use state of a modification of the membrane structure.
FIG. 6 is a schematic perspective view of a seawall shown as a third embodiment of the present invention.
FIG. 7 is a plan view of a conventional tide / breakwater.
FIG. 8 is a view showing a state when the tide / breakwater is stored.
FIG. 9 is a sectional side view of the tide and breakwater.
FIG. 10 is a front view showing a portion of the tide and breakwater.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Membrane structure 1a Film body 2R, 2L Anchorage 11 Support member

Claims (4)

Membranes are provided on both sides of the water channel, and between the foundations on both sides, the ends are locked to the foundations, extending over the entire depth in the depth direction and extending between the foundations on both sides in the width direction. Provide a structure,
The membrane structure includes a membrane body, a cable provided in the longitudinal direction of the membrane body, and an auxiliary membrane member extending in the longitudinal direction from an end portion of the membrane body at an end portion of one side surface of the membrane body. ,
The combined length of the membrane body and the auxiliary membrane member is longer in the longitudinal direction than the cable, and both ends of the cable are fixed to the foundation ,
When the auxiliary membrane member is pressed against the foundation by water pressure, water leakage is prevented, and conversely, when the auxiliary membrane member is detached from the foundation and a gap is generated, water is released. breakwater. The auxiliary membrane member covers a gap between the cable and the foundation;
The tide / breakwater according to claim 1, wherein the foundation is provided with a support member that supports an end portion of the membrane structure from the back surface.   The tide / breakwater according to claim 2, wherein the support member is configured by a smooth concave curved surface on a side supporting the membrane structure.   The tide / breakwater according to any one of claims 1 to 3, wherein the membrane structure can be divided and fixed to the left and right at a central portion.

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