JPS6040406A - Flexible film dam - Google Patents

Abstract

PURPOSE:To improve the durability of a flexible film dam by preventing the application of forcible tension by a method in which the flexible film dam is made of a strip-form rubber film, a single layer is provided to the upstream side of the dam body, and a baggy portion is provided to the downstream side. CONSTITUTION:The body of a flexible film dam 10 is made of a strip-form rubber film 11 in such a way that the single layer 12 of rubber film 11 is formed on the upstream side of the body and a baggy portion 13 is formed on the downstream side. The outside diameter of the baggy portion 13 is determined such that a buoyancy corresponding to the water level difference H-h, where H is water level on the upstream side in case where flood or high tide occurs and h is water level on the downstream side. When supplying air to the baggy portion 13 of fallen dam 10, the dam 10 is raised and the upstream side is isolated from the downstream side. Even when the height of the dam is considerably high, the volume of the baggy portion 13 can be made smaller and therefore the cost of production can be reduced. Also, since the buoyancy is small, the application of forcible tension can be avoided.

Description

[Detailed description of the invention]

This relates to a flexible membrane weir installed in a location where the water level difference between streams is small compared to the water depth. By installing removable wooden bins at the port entrances and exits,
It is possible to prevent storm surge from entering the port. In addition, in ports located at river mouths, weirs that can be opened and closed are installed at the entrances and exits of the ports, for example, in areas where large amounts of earth and sand flow due to floods.
Additionally, by blocking the weir, it is possible to prevent sediment from entering the port. If a flexible membrane weir OL, generally called a rubber weir, as shown in Fig. 1 is adopted as the weir body, the air inside will be removed when it is not in use, and it will be collapsed along the bay bottom 02. and cannot obstruct the passage of ships. However, in places with large water depths such as ports, flexible membrane weirs 01
When the awn is placed in a horizontal position, the buoyancy is extremely large when the awn is erected by introducing air, and a large tension is applied to the fixed part.
Durability is impaired, and since a huge bag-like body is used as a flexible membrane, the manufacturing and installation costs are high, and the internal volume of the bag-like body is large, requiring a large blower. This will also increase construction costs. Also, it is possible to fill the visible membrane weir 01 with water instead of air, but when discharging the water after use, the dirt inside the membrane weir body will be released.

[Care must be taken to prevent environmental pollution from occurring, which increases maintenance and management costs. The present invention was devised under such circumstances, and is installed across the base floor and both side walls in a place where the water level difference between upstream and downstream is small compared to the water depth. In a flexible membrane weir that rises when it is pumped up and collapses when it is discharged, the inside of the visible membrane weir 01 is a single layer on the upstream side, while the downstream side is a band-shaped flexible membrane with a bag-like structure. forming a band-like flexible membrane whose upstream IllIIIM edge is connected to the base and both @
It is fixed to the wall part, and the fixing line to the i71'ii side wall part is formed in the form of an inclined line that increases in temperature from the downstream side to the upstream side, and the bag-shaped part of the band-shaped flexible membrane and the locking part are removed. The flexible membrane weir body is moored to the downstream base part at a point where air is supplied to the bag-like part and when the bag-shaped part is erected, the flexible membrane weir body maintains an inclined posture displaced toward the downstream side. The length of the locking member is determined as required. An object of the present invention is to provide a flexible membrane weir whose internal volume is small compared to the height of the weir, which requires a small amount of air to be fed and which does not apply unreasonable tension to the fixed parts. It is in. In the flexible membrane weir of the present invention, as described above, the main body of the flexible membrane weir is formed of a single layer on the upstream side, and a band-shaped flexible membrane having a bag-like structure on the downstream side. , since it is fixed to the upstream side edge, base and both side walls of the band-shaped flexible membrane, when the bag-like part is filled with air, the bag-like part expands into a circular cross section and floats up, The flexible membrane weir is erected and the upstream and downstream sides are cut off. First, the ability to deal with the difference in water level (difference in water level between the upper and downstream sides) depending on the buoyancy obtained in the bag-shaped part becomes the ability of the sword. In other words, the volume of the bag may be determined depending on the difference in water level between the upper and downstream sides at the installation location. Therefore, even if the weir height is considerably large, the volume of the bag-shaped part can be small, the manufacturing cost of the 11 membrane weir body is low, and the buoyancy obtained by the bag-like body is small, so that the fixed part of the body can be No unreasonable tension is applied, and the durability is good. Moreover, since the air pressure filled into the bag-shaped part is low and the temperature is good, the capacity of the blower can be small, and the equipment cost is low. In addition, since the fixing lines to both side walls of the band-shaped flexible membrane are formed into inclined lines rising from the downstream side to the upstream side, when the air filled in the bag-shaped part is discharged, the band-shaped flexible membrane The membrane, ie the flexible membrane weir body, always lies flat on the downstream side. Furthermore, when the bag-shaped part of the band-shaped flexible membrane is moored to the downstream base using a locking member, and the flexible membrane weir is raised, the flexible membrane weir body is attached to the downstream side. Since the length of the locking member is determined so as to maintain the tilted position displaced to Tighten the flexible membrane to support the weir body and maintain the tilted position. Therefore, the parts fixed to both side walls do not apply unreasonable tension to the main body of the flexible membrane weir and impair its durability. Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 2 to 8. In FIG. 2, R and S represent the two rivers and the sea, and a port 1 is provided along the river at the mouth of the river. The port 1 is defined by breakwaters 2 and 3.4, and there is an entrance 5 between the breakwaters 2.3. Then, at this entrance/exit 5, a rubber weir IO is installed. Rubber weir [0], foundation base Huntaritoro and both breakwaters 2.
(See Figures 3 and 4. However, Figures 3 and 4 are respectively fixed to the walls 2A and 3A of Figure 2. (This is a view from the line arrow, and both are shown in an upright position). However, as shown in FIG. 5, the main body of the rubber dam 10 is formed of a long rubber band @ 11 reinforced with canvas or the like, and the band-shaped rubber membrane 11 has a single layer part 12 and a bag. It is composed of a shaped part I3 and i'1. 't there. The belt-shaped rubber membrane 118 is cut at both ends in its longitudinal direction in an inclined manner as shown in FIG.
2 side edges] 2σ [trowel fixed, wall surface 2A% of facing breakwater 2.3 3 A IL vs. side edge 13 of
(See Figures 7 and 8. However, Figure 7 is a cross section taken along the Vll-Vll line in Figure 3, and the
The figure is the rubber salt corresponding to the ■1-■ cutting line in Figure 3.
FIG. 2 is a cross-sectional view showing the collapsed state of In addition, as is clear from Fig. 8, the wall surface 2A% 3A is
The fixed line L is in the form of an inclined line Y rising from the river R side (upstream side) toward the port I side (downstream side). Furthermore, the bag-shaped portion 13 of the band-shaped rubber membrane 11 is located at a position symmetrical to the connecting line A with the single-layer portion 12 (as shown in FIG. 7, the bag-shaped portion 13
At the axially symmetrical position τ when air is introduced into the tube to inflate it, a plurality of locking bands 14 are connected together at a small interval dZ (Figs. 4, 5, (See Figure 7). These plurality of locking bands 14 are fixed at their tips to the base concrete 6, but the locking bands 14 are fixed with the rubber salt 10 erected.
The length l is so that it rises in a slope from the port 1 side (downstream side) to the river R side (upstream (II)
is set (see Figure 7). Further, at both ends of the rubber weir 100, a supply/exhaust pipe 15 is connected to the bag-shaped portion 3 (see Figures 3, 4, and 8). Inside part 13

[By supplying air, the rubber salt 1o can be made to stand up, and by discharging the air in the bag-like part 13 through the air supply and exhaust, the rubber salt 10 can be made to lie down. It is. A drain pipe (rubber check valve) 3α is attached to the center of the bag-shaped portion 13, which is located on the bottom wall during inflation. In the above configuration, the rubber salt 10 in the collapsed state shown in FIG.
When air is supplied into the bag-shaped portion 13, the rubber salt 1o stands up as shown in FIGS. 3, 4, and 7.
The river R side and the port L side are cut off. Therefore, even if a large amount of earth and sand flows down the river R side due to a flood, the earth and sand will not infiltrate into the port 1, and the dredging cost (141) within the port 1 can be significantly reduced. When a storm surge occurs, it is possible to prevent an excessive rise in the water level within the port.Thus, when the water level on the river R side during a flood or during a storm surge is set to the water level within H1 port 1. , water level difference (H-A
) The outer diameter 2 of the bag-shaped part 13 should be determined so as to obtain a buoyant force that counters the
1 Since it is a fraction smaller than rubber salt, etc. used as a water intake weir,
The outer diameter is also small. Therefore, the amount of material used for the band-shaped rubber and film 1] is small, the manufacturing cost is low, and the bag-shaped part 1
3 has a small internal volume and the filling air pressure can be low (the total water pressure acting on the bag-shaped part 13 is small), so there is no need to install a large blower, and the equipment cost is also low in this respect. First, since the internal volume of the bag-shaped portion 13 is small, the time required for evacuation is short, and it is possible to quickly respond to changes in the situation. In addition, if the water level on the river R side falls below the water level on the port L side with the rubber salt 10 standing upright, the rubber salt 10 &
A force acts from the port 1 side toward the river R side, but this force is supported by the tension of the locking belt 14, causing the rubber salt 10 to move toward the river R side and tilt. None. Therefore, no unreasonable tension is applied to the rubber salt 10, which is attached in an inclined manner to the wall surfaces 2 and 3A of both breakwaters 2 and 3, and no damage occurs. Next, after the abnormal tide level due to floods, high tides, etc. has passed, the air in the bag-shaped part 13 is discharged through the supply/exhaust pipe 5, and the rubber salt 10 is tilted to the wall 2As3Ac of the breakwater 2.3. (Always lie down on the 1st side of the port due to being kicked.)
In order to promote the lodging heat, the surface of the rubber salt IO is covered with a metal net-like weight body, or the band-shaped rubber film forming the rubber salt IO]1. Alternatively, a large number of metal plate-like pieces may be attached to the surface of the rubber film IJ and the locking band 14. At this time, if the weight body 7 at the center in the longitudinal direction of the rubber salt 10 is 1 heavier than the other parts of the other parts, the rubber salt IO will collapse from its center and the exhaust will be smooth. . In this way, by installing a weight body 1 to promote lodging, when a ship passes over it in the lodging state, the water near the base is agitated, and the rubber salt 10 is swayed. Accidents such as getting caught in the screw or being damaged can be prevented. Next, another embodiment shown in FIG. 9 will be explained. Rubber salt 2o has a main body consisting of a single layer AI 2] and a bag-like part S.
It is formed of a band-shaped rubber membrane consisting of 22 g2, and a single layer g2.
1 tip @ (upstream side edge) 7 is fixed to the base concrete 6, and a plurality of locking roses B are connected to the continuous part of the single layer part 21 and the bag-shaped part 22, and the same The other end of the stop rope η is fixed to the base concrete IJ-TRO1. By adopting such a structure, similar effects to those of the previous embodiment can be obtained, but since the rubber locking band 14 is replaced by the locking lobe 23Z, the manufacturing cost of the rubber dam is reduced. is inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of a known rubber weir, Fig. 2 is a sketch of a port located at an estuary in which a rubber weir according to an embodiment of the present invention is installed, and Fig. 3 is a view of 1111 in Fig. 2. -I
4 is a view taken along the line IV-IV in FIG. 2, FIG. 5 is a partially cutaway perspective view of the rubber weir body, FIG. 6 is a plan view of the rubber weir body, and FIG. Sentence 7 is Vll in Figure 3.
-Vll line sectional view, Figure 8 is Vll+ in Figure 3
FIG. 9 is a longitudinal sectional side view of a rubber dam according to another embodiment. I... Port, 2.3.4...° Breakwater, 5... Lu entrance, 6... Base concrete, 10... Rubber weir, 11... Rubber membrane strip, 12...
・Single layer part, 13... bag-shaped! , 13a... drain pipe, 14... locking band, 15... supply/exhaust pipe, addition... rubber weir, 2no... single layer part, 22... bag-shaped part, 23... ...Suspended Law 1゜Representative Patent Attorney Ehara Nozomi 1 Procedural Amendment Written by Kazuo Wakasugi, Director General of the Japan Patent Office, No. 1980/Japan 1, Indication of Case 1988 Patent No. 1 No. 148045 2, Title of the invention Flexible membrane weir 3 Relationship with the case of the person making the amendment Patent applicant 4, attorney 6 Number of inventions increased by the amendment None 8 Contents of the amendment As shown in the attached document (1) No. 3 in the description Lines 15-16 of page 5, line 5 of page 5, "rises from the downstream side to the upstream side" has been corrected to "rises from the upstream side to the downstream side." (2. Scope of Claims" has been corrected as per the attached sheet. "Scope of Patent Claims" In a place where the difference in water level between upstream and downstream is small compared to the water depth, extending over the base floor and both side walls. In a flexible membrane weir that is made of cloth and rises when air is introduced and collapses when air is discharged, the main body of the flexible membrane weir is made of a single layer, whereas The downstream side is formed of a band-shaped flexible membrane having a bag-like shape, and the upstream side edge of the band-shaped flexible membrane is fixed to the base and both side walls, and fixed linens are attached to the both side walls.・The bag-shaped portion of the band-shaped flexible membrane is formed in an inclined line shape rising toward the downstream side from the first rule, and is moored to the downstream side base portion by a locking member, and the above-mentioned The length of the locking member is determined so that when the bag-shaped part is erected by supplying air, the flexible membrane weir body maintains an inclined position displaced toward the downstream side. Flexible membrane weir.

Claims (1)

[Claims] A flexible membrane weir that rises when air is introduced and collapses when air is discharged is installed at a place where the water level difference between the upper and downstream sides is 1 smaller than the water depth, and is installed across the base and both side walls. While the upstream side of the flexible membrane weir body is a single layer,
The lower i1m side is formed of a band-shaped flexible membrane having a bag shape, and the upstream +111 edges of the band-shaped flexible membrane are fixed to the base floor and both side walls, and fixing lines to the both side walls are The bag-shaped portion of the band-shaped flexible membrane is formed into an inclined line rising from the downstream side to the upstream side, and is connected to the downstream base F by a locking member.
! The length of the locking member is set so that when the bag-shaped portion is erected by supplying air, the flexible membrane weir body maintains an inclined posture displaced upstream. A flexible membrane weir characterized by the following features: