JPS5944446B2 - Structures such as riverbeds for rubber weirs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber weir for use in weirs for taking in agricultural water, seawalls during high tides, seawater dams at river mouths, weirs installed on embankments to prevent flooding when river water levels rise, etc. This relates to structures such as riverbeds for installing weirs.

Automatic tipping weirs made of iron have been known as weirs for water level adjustment, such as intake of agricultural water and seawater damming at river mouths.

This iron automatic overturning weir is operated by hydraulic cylinders, etc., and has the drawbacks of being difficult to maintain and impossible to install on soft ground.

Therefore, in recent years, rubber dams have been developed and put into practical use that operate by letting fluids such as air in and out, and are easy to install and maintain.

However, when this rubber weir was installed on a river near a residential area, the sound of falling overflow water was quite loud, and was one of the causes of so-called noise pollution.

The present invention is based on the above-mentioned rubber weir (to eliminate noise generation), and in a structure such as a riverbed where a rubber weir is installed that rises and falls due to the supply and discharge of fluid, overflow water falls when the rubber weir is erected. The structure of a river bed for a rubber weir is characterized in that the river bed is inclined at an angle of 30° or more toward the flow direction of the river.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a riverbed, etc. for a rubber dam of the present invention will be explained in detail below according to the drawings.

1 and 2 show a rubber weir body suitable for use in the present invention.

This rubber weir body is made of a flexible rubber-like elastic band having one peeled portion at appropriate positions in the thickness direction along the longitudinal direction.

The strip 1 shown in FIG. 1 is formed in advance as a hollow body, and has a peeled part 1a that expands and becomes tubular by filling a fluid such as air or water, and a peeled part 1a that extends along the longitudinal direction. ℃, and a plate-shaped attachment portion 1b provided integrally with the band-shaped body 1 shown in FIG. 2 '&'! , has a peeling part 1a' with one end open.

The rubber weir body shown in FIGS. 1 and 2 is a preferred example, and the present invention is not limited thereto.

In other words, bags may be made from rubber sheets that have been widely used in the past.

To form the rubber weir bodies 1 and 1' shown in FIGS. 1 and 2, for example, a peeled portion 1a is placed between two raw raw rubber sheets on a hot surface plate of a molding grate along the longitudinal direction of the intermediate region. A mold release material may be interposed in the area defining 1/a, and integral press molding may be performed at the vulcanization temperature of the raw rubber sheet.

At this time, a desired reinforcing layer can be obtained by appropriately embedding the rubberized canvas 2 or the like between the raw rubber sheets.

Such a rubber weir body 1' is connected to a riverbed 3 as shown in Fig. 3.
The method of installation is arbitrary, for example, by using the abutment plate 6 and nut 1 on the anchor bolt 5 etc. buried in the fixed part 4 of the rubber weir body in the riverbed 3 etc. in advance. Alternatively, the anchor bolts 5 or the like may be attached to the rubber weir body 1' in advance and then fixed to the cut-out riverbed 3 or the like later.

As shown in Fig. 4, the structure of the river bed 3 etc. on which the rubber weir body 1' is installed is the river bed at position 8 where overflow water falls when the rubber weir body 1' is erected by supplying fluid. The present inventors have found that slanting the pipe in the direction of the flow of a river or the like is very effective in preventing noise caused by falling overflow water, and has completed the present invention.

This angle of inclination (indicated by θ in FIG. 4) can be freely selected from the relationship between the volume reduction and the angle of inclination shown in FIG.

In the relationship between the volume reduction and the inclination angle shown in Figure 5, approximately 4
If the angle is 5 degrees or more, the sound will be reduced by 10 dB, but this 10 d
Intuitively, B's sound reduction is more effective than reducing the generated sound by half.

This angle of inclination can be arbitrarily set depending on the need for noise prevention, the conditions of the river bed, etc., but in order to obtain the above-mentioned great effect, it is desirable to set it to approximately 45° or more.

Further, the length of the inclined river bed portion 8 must be set to such a length that overflow water does not fall directly onto a flat part such as the river bed 3.

Further, as a method for inclining the river bed or the like at the position 8 where overflow water falls, any method such as pouring concrete, installing concrete blocks, installing rubber plates, etc. may be used.

When using the rubber weir body shown in Fig. 1 and Fig. 2, the structure of the riverbed, etc. at the fixed part position 4 of the rubber weir main body as shown in Fig. 3 and Fig. 4 should be position 8
It is preferable to incline at approximately the same angle as the inclination angle of .

In this way, when the rubber weir collapses, the rubber weir body will be placed in the third position.
As shown in the figure, it will adhere tightly to structures such as riverbeds.

In addition, if the fixed part position 4 is installed on a flat riverbed, etc., the rubber plate that will be the top surface of the rubber weir body should be moved to the position 8 where overflow water falls.
It is preferable to make the length longer than the rubber plate that will be the bottom surface depending on the zero angle, and by doing so, as mentioned above, when the rubber weir is collapsed, the rubber weir body will be in close contact with the structure such as the river bed. .

Although the present invention is not limited to the above-described method of fixing the rubber dam, the above-described attachment method is preferable in order to extend the life of the rubber dam without applying undue stress to the main body during collapse.

In addition, if the rubber sheet 1, which has been widely used in the past, is made into a bag at the site and used as the rubber weir body, the fixing position may be flat as shown in Figure 6, but in this case there is no drainage fin. Therefore, the falling position of the overflow water is closer to the rubber weir body than the rubber weir shown in FIG.

As described above, according to the present invention, since the riverbed, etc. at the position where the overflow water falls when the rubber weir is erected is inclined toward the flow direction of the river, noise caused by falling water can be minimized. Therefore, rubber dams can be installed on rivers, etc. close to residences.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views showing an example of a rubber weir body used in the present invention, and Figure 3 is a cross-sectional view showing the rubber weir body of Figure 2 attached to a structure such as a river bed according to the present invention. , Fig. 4 is a cross-sectional view showing the state in which the rubber weir body shown in Fig. 3 is erected and the overflow water falls, and Fig. 5 is a diagram showing the relationship between the volume reduction and the inclination angle of the position where the overflow water falls. , FIG. 6 is a sectional view of a rubber weir made of a rubber sheet as a bag installed on a riverbed or the like according to the present invention. 1.1' - Rubber weir body, 2... Canvas, 3... River bed, 4... Riverbed fixation part of the rubber weir body, 5... Anchor bolt, 6... Abutment plate, 7...Natsuto, 8...
The river bed where overflow water falls.

Claims (1)

[Claims] 1. In the structure of a riverbed, etc., where a rubber weir that rises and falls due to the supply and discharge of fluid is installed, the riverbed where the overflow water falls when the rubber weir is erected is at an angle of 30° or more toward the flow direction of the river, etc. Structures such as riverbeds for rubber weirs that are characterized by their slope.