JP3208474B2 - Flooding removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inundation elimination facility for quickly irrigating natural effluent from a levee inundated by an increase in inland water level.

[0002]

2. Description of the Related Art A dike surrounding a river has conventionally been provided with a gutter for drainage from inside the embankment. If the ground height in the embankment is low, the height difference between the floor height of the gutter and the normal outside water level of the embankment (water level of the river) will be small, and even if the outside water level rises slightly, The gates of the gutters had to be closed frequently to prevent inflow of water. And once the door is closed, it cannot be opened again unless the outside water level falls below the inland water level (water level in the embankment), so if the external water level rises abnormally due to heavy rain, etc., the inland water in the embankment can be drained for a long time However, the inflow of water, etc., exceeded the storage capacity of the embankment area, and flooded roads, residential areas, and agricultural lands, which had a negative impact on the lives of residents on the embankment area. In addition, the storage capacity of the inland water will decrease in the future due to the decrease of the fields due to the urbanization of the inland area, and there is a concern that the inundation will continue for a long time due to heavy rains. It has been demanded. On the other hand, the operation of opening and closing the gutter door is generally performed by a local fire brigade or a public agency. Most doors are manually opened and closed, so if a person operating in a disaster such as a typhoon or heavy rain cannot get close to the gutter, the gutter door cannot be operated in response to the rise in the external water level. Water could flow back and cause significant damage to the embankment. In order to avoid this, automatic doors that automatically open and close the door by detecting the outside water level were sometimes introduced.However, once the outside water level increased and the door was once closed, the river side Even if the outside water level falls below the inland water level of the embankment, the door will not open unless the water level falls below the reference water level for opening and closing the door, and flooding will continue for a long time until the outside water level falls below this reference water level. It was not a measure. There has been a conventional method of removing such inland water by forcibly draining the water using a pump, which was the most reliable method of removing water. In addition, the maintenance and management required a great deal of cost, regardless of the scale, and could not be easily introduced.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve the above-mentioned problems, and to reduce the height of the inner surface of the embankment from the same level as the inner water level in the embankment on the front side of the required number of gutters on the dike. By draining water naturally, the internal water can be quickly drained in accordance with the decrease in the outside water level to eliminate flooding in a short period of time. It is an object of the present invention to provide inundation elimination equipment that can be modified even in the case of river table only.

[0004]

Means for Solving the Problems The structure of the present invention which has solved the above problems is as follows: 1) The main body of the gutter crosses the lower part of the embankment to connect the river with the inside of the embankment. Provide a door that prevents backflow into the embankment, and a tower body with a water passage space inside that connects to the gutter main body behind the door and reaches near the height of the embankment. A plurality of drain outlets are provided at predetermined intervals in the range from the height of the embankment on the side wall of the tower to the bottom of the gutter main body, and a gutter having a flap gate attached to the outside of each of the drains is provided on the ground near the river. The required number of dikes in low-lying areas where flooding is likely to occur, and the backside of the gutters connected to drainage or agricultural irrigation canals in the embankment. 2) The drainage outlets and flap gates of the gutters The flood elimination according to 1) above, which is provided at a position facing the downstream side of the river from the tower body. Equipment 3) The inundation elimination equipment according to 1) or 2) above, wherein the door of the gutter is an automatic opening / closing hoist that opens and closes by detecting the water level of the river. The inundation elimination equipment according to any one of 1) to 3) above, wherein one or more flap gates are provided within a range of the height of the gutter main body. The closing door of the present invention includes an automatic opening / closing type in which the water level is sensed, a manual opening / closing type at the site, and a remote opening / closing type.

[0005]

When the outside water level is lower than the floor height of the gutter, the door on the front side of each gutter provided on the embankment is rolled up and kept open as usual. Ensure that drainage from the land is available. When the outside water level rises due to the rising water due to heavy rain, etc., and the water reaches the water level where the water starts to flow back to the gutter gate, the door is closed and the inflow into the embankment is prevented. If the external water level rises and exceeds the water level of the embankment land, that is, the internal water level, drainage from the embankment area cannot be performed and the internal water level rises, overflowing the low land beyond the amount of stored water such as drainage channels in the embankment area, It will be flooded. On the other hand, the internal water is also contained in the water flow space in the tower body that is connected to the drainage channel and the agricultural waterway in the embankment via the gutter main body, and the same water level as the internal water level in the embankment ground is maintained. After that, while the external water level is higher than the internal water level, the internal water cannot be removed from the outside of the embankment, and the land inside the embankment continues to be flooded, but when the external water level falls and falls below the internal water level, the tower body Of the flap gates of the plurality of drain outlets, the one at or below the height of the outer water level is pushed outward by the difference in water level between the inside and outside of the flap gate, and discharges the internal water outside the embankment. The internal water can be removed until the internal water level becomes almost equal to the external water level. When the external water level further decreases, the lower flap gate opens due to the water level difference and removes the internal water.The internal water level follows the external water level decrease only by natural drainage, and the water level is reduced quickly. Eliminates flooding in a short time. In addition, if the gate of the gutter gate is closed and normal drainage cannot be performed, if the external water level does not rise much and falls below the minimum flooded water level in the embankment, inland water can be removed from the flap gate, The amount of inland water inside the embankment does not increase and it is not flooded.

In a configuration in which the drain port and the flap gate face the downstream side of the river, the flap gate is located at a position that is hardly affected by the flow of the river. Opening and closing only by the difference in water level between the inside and outside without being influenced by the pressure of the flow, there is no decrease in drainage speed and no delay in drainage, and there is almost no danger that foreign matter flowing down the river will be caught and cannot open and close the flap gate.

[0007] In the configuration in which an automatic opening / closing type hoisting door is used as the gutter gate, when the outside water level is equal to or lower than a preset reference water level for opening / closing the hoisting door, the hoisting door is raised. It is held and kept open, and drainage from the embankment continues. When the outside water level rises and reaches the reference water level, the hoisting door automatically lowers and closes the gutter to prevent water from flowing into the embankment.

In a configuration in which one or more drainage ports and flap gates are provided within the range of the height of the gutter main body, even when the outside water level falls to the position of the gutter door, the inner water level is maintained even when the door is closed. If the water level is higher than the external water level, the internal water can be drained through the drainage port and the flap gate, and the internal water level in the embankment can be lowered.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a tower body provided at a gutter gate is connected to a gutter body at the rear of a door, and has a water passage space extending to near the height of a dike and a concrete opening having an opening serving as a drain port. Or reinforced concrete is generally used. The planar shape is desirably rectangular, but may be other shapes, and the planar shape of the internal water passing space need not be similar to the tower body, and a circular hole or the like may be used. Further, the tower body may be connected to and integrated with the column.

In the present invention, a plurality of drain ports provided in the tower body of the gutter gate are desirably provided in a rectangular shape having a sufficient size to allow sufficient drainage of inland water from the inside of the embankment. Other forms may be used. In addition, in order to make the outflow of the internal water smooth, a plurality of them may be provided side by side. The steel flap gate that opens and closes the drain port is generally made of steel that is slightly larger than the drain port and that can be opened and closed via a hinge at the upper end so as to cover the drain port from the outside. A structure having a different shape and configuration may be used as long as the structure is opened only for the pressure from the water space side and closed when there is no difference between the inside and outside water levels and the outside water does not flow.

As the door for opening and closing the gutter gate of the present invention, it is desirable to use a hoisting door that is securely closed and advantageous in space.
Another type of door may be used. When the door is automatically opened and closed, a float-controlled door opening and closing mechanism that opens and closes the door by detecting a change in the water level with the vertical movement of the float is generally used. Good. In the present invention, outside the flap gate and near the spout of the gutter gate,
It is desirable to provide a screen that prevents the ingress of driftwood, plants, garbage, etc., and by providing the screen, it is possible to prevent driftwood and the like from entering the opening and closing space of the flap gate, and the flap gate can be reliably operated. it can. Further, it is preferable that the upstream portion of the tower be rounded so that the flow of water and driftwood / board / garbage do not stay.

[0012]

An embodiment of the present invention will be described with reference to the drawings.
In this embodiment, the door is an automatic opening / closing type hoisting door, and a gutter having a drain port of the tower body and a flap gate facing the downstream side of the river is provided at four locations on an embankment in an easily flooded area. This is an example provided across. FIG. 1 is a layout diagram of a gutter in the river basin of the embodiment, FIG. 2 is a plan view showing the gutter of the embodiment, FIG. 3 is a sectional view showing a main part of the gutter of the embodiment, and FIG. Sectional drawing which shows the tower body of a gutter, FIG. 5 is explanatory drawing which shows the drainage state from the inland by the gutter of Example, FIG. 6 is sectional drawing which shows another example of the tower of the gutter of Example. is there.

In the inundation elimination equipment of this embodiment, an existing gutter to which a drainage channel 18 is connected in advance is used as the gutter 1 provided on the embankment 11, and the river front side 11a is repaired to quickly inundate. Elimination can be done. As a door for preventing the outside water (river water) 14 on the river front side 11a from flowing into the embankment ground 12, the gutter 1 is made of a general automatic descent type steel which detects the outside water level 14a with a float and automatically opens and closes. Is provided with a hoisting door 2 of
This eliminates the trouble of operation and the danger of backflow when the door cannot be closed without approaching the gutter gate 1. A concrete pillar 4 supporting the hoisting door 2 is provided on the gutter 1 river front side 11a in a modified manner. Behind the gate post 4, a tower 6 made of the same concrete integrated with the gate post 4 is inserted into the inside of the tower 6 from the gutter main body 5 behind the hoisting door 2 in substantially the same manner as the embankment 11. It is provided so as to have a water passage space 7 reaching the height. The top of the tower 6 is opened, and when the hoisting door 2 is closed, the internal water 15 enters the same height as the internal water level 15a of the embankment ground 12. The drainage standard height of the internal water 15 in the water flow space 7 of each gutter 1 in accordance with the respective maximum internal water level position obtained from the past flooding case in the drainage basin of each drainage channel 18 connected to each gutter 1. Are set at each gutter gate 1 and 45 cm below the drainage standard height, and
A rectangular drainage port 8 of 60 cm on each side is provided, which communicates with the side of the tower 6 facing the downstream side of the river 13. With the drainage port 8 as the uppermost stage, a total of four levels of drainage holes 8 of the same shape are provided on the same side surface of the tower body 6 at intervals of 40 cm below and up to the position directly above the bottom of the gutter main body 5. Outside of each drain 8, when the outside water level 14a falls below the inside water level 15a, 40
A steel flap gate 9 that opens to the outside by the pressure of the internal water 15 and allows the internal water 15 to flow out even if the water level difference is within 10 cm.

As another example of the tower body 6 of the gutter 1 according to the present embodiment, a drain port 8 and a flap gate 9 are provided in two rows in parallel. The depth of the tower 6 is increased by the amount of two of these arranged in parallel, but the other structure is the same as that of the above example. The amount of drainage per stage increases by an amount corresponding to the increase in the number of the drain outlets 8, and the internal water 15 can be drained in a shorter time.

In the inundation elimination facility of this embodiment, the outside water level 14
When “a” is lower than the floor height 17 of the gutter 1, the hoisting doors 2 of the respective gutters 1 of the embankment 11 are in a state of being raised and opened,
The internal water 15 can be removed outside the embankment 11 as it is. When the outside water level 14a rises due to the increase of water due to heavy rain and the like, and reaches a preset closing water level of the hoisting door 2, the hoisting door 2 automatically lowers and closes the gutter 1 to the embankment 12 of the outer water 14. To prevent the ingress. If the outside water level 14a rises as it is, the drainage from the embankment ground 12 will also be stagnant, so the inside water level 15a will also rise, and if it exceeds the amount of water stored in the drainage channel 18, it will be in a flooded state.
At this time, in the water flow space 7 in the tower body 6 connected to the drainage channel 18 via the gutter main body 5, the internal water level 15
The internal water 15 has entered the same water level as a.
While the external water level 14a is higher than the internal water level 15a, the internal water 15 cannot be removed and the inland area 12 continues to be flooded, but the external water level 14a decreases and falls below the internal water level 15a in the water flow space 7. Of the flap gate 9 of the drain port 8 provided in five steps,
The water just below the outer water level 14a is pushed outward by the difference between the inner and outer water levels, and drains the inner water 15 out of the embankment 11. Embankment 12
Is discharged from the drainage channel 18 to the outside of the embankment 11 through the gutter main body 5 and the water passage space 7, so that the internal water level 15a is also lowered together with the external water level 14a, and the flooded state is quickly reduced. Be relaxed. When the outside water level 14a further decreases, the lower flap gates are opened one after another corresponding to the outside water level 14a in the same manner as described above, and the natural drainage of the inner water 15 is quickly performed following the decrease in the outside water level 14a. And the outside water level 1
4a is lower than the floor height 17 of the gutter gate, the hoisting door 2 is automatically raised and opened, and the inner water level 15a is lowered and the short time is shortened sooner that drainage from the embankment ground 12 can be performed as before. Can be flooded. The flap gate 9
Is opened only by the pressure from the internal water 15 side, and when the difference between the internal and external water levels disappears, the drain port 8 is closed by its own weight, so that the external water 14 does not flow from here. In addition, drain port 8
And since the flap gate 9 is located on the side of the tower 6 facing the downstream side of the river, foreign matter such as driftwood or garbage flowing down when the river rises is not caught and does not hinder the opening and closing of the flap gate 9. There is almost no damage due to these contacts and collisions. Then, the internal water 15 can be drained without a delay without lowering the drainage speed without making the flap gate 9 difficult to open due to the pressure of the flow.

With the introduction of the inundation elimination system of this embodiment, the time during which the inundation in the embankment continues is different depending on the inland water level and the ground height of each district, but it is about 40 to 80% as compared with the conventional one. The impact on life is also reduced.

[0017]

According to the present invention, by adopting the above-described structure, the internal water can be quickly eliminated following the decrease in the external water level,
The inundation of the embankment area can be eliminated in a shorter time, and the impact on residents' lives can be minimized. In addition, it can be installed inexpensively only by renovating the front side of the gutter, eliminating the need for drainage of inland water as natural drainage based on the difference in water level between the inside and outside, and can be maintained and managed with a simple structure at low cost. Easy to introduce as.

If the drain port and the flap gate are provided at a position facing the downstream side of the river, foreign substances such as driftwood and dust flowing down the river are caught by the flap gate and the drain port, thereby preventing opening and closing of the flap gate. Can be prevented, troubles such as drainage failure and backflow do not occur, damage is less likely to occur, and maintenance costs can be reduced. In addition, the opening and closing of the flap gate can be performed without being affected by the pressure of the river flow.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a gutter in a river basin according to an embodiment.

FIG. 2 is a plan view showing a gutter gate of the embodiment.

FIG. 3 is a cross-sectional view illustrating a main part of a gutter of the embodiment.

FIG. 4 is a sectional view showing a tower body of a gutter in the embodiment.

FIG. 5 is an explanatory diagram showing a state of drainage from an inland area by a gutter in the embodiment.

FIG. 6 is a cross-sectional view showing another example of the tower body of the gutter in the embodiment.

FIG. 7 is an explanatory view showing the operation of a conventional gutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gutter gate 2 Hoisting door 2a Elevating shaft 2b Elevating device 3 Operation room 4 Gate column 5 Gutter main body 6 Tower body 7 Water passage space 8 Drain port 9 Flap gate 9a Hinge part 10 Water tap 11 Embankment 11a River front side 11b River back side 12 Inside the embankment 13 River 14 Outside water 14a Outside water level 15 Inner water 15a Inner water level 16 Riverbed 17 Floor height 18 Drainage channel 19 Lowland

Claims (4)

(57) [Claims] 1. A main body of a gutter crosses a lower part of a dike to connect a river and an embankment. A door is provided on a front side of the main body of the gutter to prevent water from flowing back into the embankment. Provide a tower body with a water flow space inside that connects to the gutter body and reaches near the height of the embankment, and a drain from the water flow space to the outside of the tower from the height of the embankment on the side wall of the tower body to the bottom of the gutter main body The required number of gutters provided at a plurality of predetermined intervals in the range of the height of the above, and flap gates attached to the outside of each of the drainage ports are provided on a levee near the river where the ground height is low and the water is easily flooded. Inundation elimination equipment that connects the backside of the gate to a drainage channel in the embankment or an agricultural canal. 2. The flooding elimination facility according to claim 1, wherein a drain port of the gutter gate and a flap gate are provided at a position facing a river downstream side of the tower body. 3. The flooding elimination facility according to claim 1, wherein the gutter gate is an automatic opening / closing hoisting door that opens and closes by detecting a water level of a river. 4. The gutter gate according to claim 1, wherein one or more drainage ports and flap gates are provided within a range of the height of the gutter main body.
3. The flooded water elimination equipment according to any one of (1) to (3).