JPS58156614A - Erection of rising and falling dam weir with deposited soil and sand - Google Patents

Abstract

PURPOSE:To smoothly erect a rising and falling dam regardless of the deposition of soil and sand by a method in which another small-diameter flexible rising and falling dam weir is provided inside of a flexible rising and falling dam body, inside the rising and falling dam in which soil and sand deposit is erected in advance, and then the rising and falling dam body is erected. CONSTITUTION:Separate one or plural small-diameter flexible bags 2 to be raised or fallen by the supply or discharge of a pressure fluid are provided in the inside of the bag of a flexible dam weir attached to the river bed and to be erected or fallen by the supply or discharge of a pressure fluid. When falling the dam, where soil and sand 3 are thickly deposited on the upside of the dam on the river bed, a pressure fluid is supplied to the inside small-diameter bag 2 to erect it so as to lift up deposited soil and sand 3, the deposited soil and sand 3 is removed, and then pressure fluid is supplied to the dam body 1. By this, the rising and falling dam weir buried under the deposited soil and sand can be very easily erected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for erecting an undulating weir with accumulated earth and sand.

Conventionally, one of the weirs installed on rivers is a weir made of a flexible bag made of rubberized cloth, which is made to undulate more than K when pressurized air is supplied and discharged inside. This undulating weir is K during floods.
The structure is designed to allow the IIP to fall down and raise it again by supplying air after a flood. However, if a large amount of sediment accumulates at the top of the undulating weir during a flood, the undulating weir may be lowered. This soil is often not removed automatically when standing up, and for this reason, it is necessary to manually remove the soil and then let the robot stand up. There was a problem with F.

The undulating weir can be pressurized by supply air with a maximum of 2 m/-, that is, 2 t/m"ll & trench, and in case of 01 grade soil, the sediment thickness should be raised to IsQ degree. However, it is difficult to erect an undulating weir when there is a large amount of sediment as described above.Especially in river channels where river improvement has not yet been completed, the height of the weir should be adjusted to the future planned river bed. When placing the high or even lower position,
(The upper part of the weir is much lower than the current river bed height.) Every time there is a flood, a large amount of earth and sand accumulates on the dam, which can cause problems with the pipe layer of the undulating weir.

It is an object of the present invention to provide a method that eliminates the problems of the conventional methods as described above, easily removes accumulated earth and sand, and thereby allows a undulating weir to be erected smoothly.

The invention will now be described in detail with reference to embodiments shown in the drawings.

As shown in FIG. 1, an undulating weir 1 consisting of a flexible bag made of rubberized girder is airtightly installed via a river bed mK fitting. The undulating weir 1 is so constructed that it is supplied with internal 1BK pressurized air by a supply/exhaust device (not shown), stands up, is discharged, and falls down. A flexible bag 2 such as a rubberized self-fabric is housed inside the undulating weir 1, and this bag 8 has a relatively small diameter and is airtightly attached to the riverbed via a fitting similar to the undulating weir 1. It is installed at 5. The nine-bag body 2 is designed to stand up when pressurized air is supplied to the inside of the air supply/exhaust denture (not shown), and to contract when it is discharged. Figure Jl1 shows a normal state, in which the undulating weir 1 is erected due to the supply of pressurized air, and the inner bag body 2 is contracted as the pressurized air is exhausted.

Note that 4 indicates running water.

As shown in Figure M2, during one flood, Ka undulating weir 1 collapses due to pressure air being discharged, and this undulating weir 1 collapses.

Sediment 3 is deposited in part E.

After the flood has left, as shown in Figure 3, relatively high pressure air is first supplied to the internal bag body 2 to
When this is done, due to this expansion, a part of the undulating weir 1 rises and accumulates, and the sand 3 is lifted by the diameter of the bag body 2, creating a crack 8 in the center. On the other hand, the speed of flowing water 4 is sediment 3
The size increases as the flow rate increases, and the flowing water removes and carries away the earth and sand 3 above the P-bag body 2, and the earth and sand 3 on the F-stream side of the neck-nine bag body 2 is also carried away.

Part 1 & When pressurized air is supplied to the inside of the undulating weir, the earth and sand 3 on the undulating weir are removed by a certain S degree, so the undulating weir is! It will stand up smoothly while removing the earth and sand 3 of l1l).

Figures 4 to 6 show examples of Hiroshi et al.

The taK of undulating weir 1 is 11! As in the example, several (three in this example) bags 2m, 2b, and 2c are stored, of which bags Hm and 2b are set up on the riverbed, and another bag 2c Id is placed on the bay shore. A stone is supported at both ends and placed on the bag body Hm, 2b.

During a flood, the undulating weir 1 is laid down as shown in Figure 5, and sK soil 3 is deposited on top of it, but when the undulating weir 1 is erected again, the undulating weir 1 is laid down as shown in Figures 6 (a), (b), (c), and 6. Bag body! Insect, bag body! b and bag body zctDM incense, bag body 2m,
2b, 2c When K pressurized air is supplied to cause the bulge to erupt, a part of the undulating weir 1 rises in stages due to this swelling 1111, and as shown in 4, the earth and sand 3 gradually forms the bag body 2a and the bag body 2c. , and a crack 8 is created in the center.

Then, as in the above embodiment, the running water 4 is applied to the bag bodies 2m and 2b.
, 2c are removed and the earth and sand 3 are removed, and then, when pressurized air is supplied to 11 of the undulating weir 1, the undulating weir 1 is smoothly erected. In the case of Jin's example, the bag body! m,
It is not necessary to inflate all of 2b and 2c.
The number may be increased or decreased depending on the amount of soil #3.

In both embodiments, after the undulating weir l is erected, the inner bag body 2 or the bag bodies 2a, zb, 2C#'i first illustration or fourth
It may be deflated by discharging the pressurized air as shown, or it may be left inflated.

Furthermore, in both embodiments, a method for erecting an undulating weir that rises and falls by supplying and discharging pressurized air has been described. Applicable.

This invention is as described above, and by inflating the Kubutsu bag housed inside the undulating dam, the earth and sand that has collapsed and accumulated on the undulating dam is lifted up and washed away with running water. Since it can be easily removed, the undulating weir can be erected smoothly, and there is no need to artificially remove earth and sand, which has the effect of eliminating fllK problems.

[Brief explanation of the drawing]

Figures 1 to 3 show examples of the present invention, with Figure 1 being a cross-sectional view showing the undulating weir in an upright state, and Figure 2 showing the undulating weir being collapsed and soil deposited on top of it. Figure 3 is a cross-sectional view showing the state in which the inner bag is inflated to remove earth and sand, Figures 4 to 6 show other embodiments of the present invention, and Figure 114 is 1111. FIG. 5 is a cross-sectional view showing a state similar to that shown in FIG. 2, and FIG. 6 is a cross-sectional view showing a state similar to that shown in FIG. JIa. 1-=undulating weir 2.2m, 2b, 2c +es
Inner Confucian body 3...Earth Sand 4...Flowing water 5...River Tokoe 1 figure Ryo 2 figure y PJ4 figure Box 5 figure

Claims (1)

[Claims] 1. A relatively small-diameter flexible bag that contracts by supplying and discharging pressurized gas to the inside of the undulating weir, which is installed on the river bed and consists of a flexible bag that rises and falls by supplying and discharging pressurized fluid. When earth and sand accumulates on the top of the undulating weir, which has been collapsed after harvesting the body and discharging the pressure fluid and gas, first, pressurized gas is supplied into the inner bag to cause sag, and this mistake causes the undulating weir to collapse. Erecting an undulating weir with accumulated earth and sand, which is characterized by lifting up the partially erected sediment, removing the lifted sediment with running water, and then supplying pressure fluid into the undulating field to erect it. Method.