JP4194016B2 - Maintenance and management method for reservoir - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
Regarding the maintenance and management method for reorganizing the basin that abolishes and integrates the small and medium-sized agricultural danger ponds, and further including the maintenance and integration of the ponds that effectively use sludge generated in agricultural water sources as materials for agricultural infrastructure development facilities. It relates to the management method.
[0002]
[Prior art]
1. Small and medium-sized agricultural ponds are not manually controlled and flood controlled. In other words, when the flood is always full and the ratio of the inflow volume, the area of the basin, and the area of the inflow area is 1:30 or less, there is a flood control function by the full water surface. The flood volume is calculated on the assumption that there is no flood control function.
2. In addition, when rehabilitating a basin, a spillway is provided in consideration of the safety of the dam body of the basin, but it is not necessary to examine the flow capacity of downstream waterways.
3. We are conducting a basin reorganization project in order to abolish the danger basin of small and medium-sized agricultural basins and integrate it into an efficient basin to make it a safe and inexpensive facility.
4). When abandoning a pond and reclamation, it is possible to reclamate the abandoned pond after investigating downstream drainage channel capacity and taking measures.
5. In any case, the consent of the parties concerned is to be obtained.
[0003]
6). Since the consolidation of Tameike is limited to the same water system, the pipe plan is planned as a separate project from the Tameike Reorganization Project.
7). Sludge is treated as residual soil or industrial waste.
[0004]
[Problems to be solved by the invention]
1. As a result of examining the drainage capacity of the downstream drainage channel of dangerous ponds, if there is no drainage capacity, it is dangerous to use urgent ponds if the drainage channel is repaired first and then abandoned ponds are landfilled. Therefore, if the danger reservoir is repaired first, the project cost will be higher than the abolition and integration, and the subsequent expenses will also be higher. The problem was a method and a method that could be implemented safely and inexpensively with a limited budget and at an early stage.
2. In addition, even if the downstream drainage channel has been developed, the people involved in the downstream have thought that the amount of flooding will increase if the basin is landfilled, and it is often impossible to abandon the basin because the landfill agreement cannot be obtained. Therefore, if it cannot be abolished and is renovated, it will involve a large amount of public investment. In general, when the pond is repaired and when the water source is secured by dredging and the amount of water stored in the integrated basin is secured by dredging, the abolished integrated construction method cost is about 1. From the above, it was a challenge to obtain the consent of downstream parties in any case.
[0005]
1. Consolidation due to the reorganization of the reservoir was limited to the same water system. In addition, the upstream side is limited to the integrated reservoir, and the downstream side is limited to the abolished reservoir. For this reason, the purpose of the basin reorganization was not fully demonstrated in the small and medium ponds with high density. Another problem is that it requires a lot of effort because it plans and implements the pipe reorganization project and the tame pond reorganization project as separate projects.
2. The sludge generated in the water source is mixed with a solidifying agent or dry soil, adjusted to moisture, and transported, and the remaining soil is discarded or disposed of as waste. Is an issue.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the first technical idea is: Explain the damage when the danger basin broke down and the current drainage status of the drainage channel without changing the current flood volume of the abandoned pond to the downstream parties, and land the high risk danger pond first. Next, explain that the improvement of the drainage channel will be carried out one after another.
2. That is, abolished the basin in landfill method such as flood of spillway discontinued basin does not increase, to solve the problem easily consent obtained will be described downstream parties that landfill Ru.
3. Even if the downstream drainage channel is undeveloped, if the flood volume of the abandoned basin is not changed, the downstream drainage is the current situation, and in order to prevent the urgent basin collapse, the basin is first reclaimed, and then the downstream waterway If it is explained that it will be developed in stages, the consent of downstream parties can be easily obtained and the problem will be solved.
[0007]
In addition, the second technical concept generally spans many water systems in the dense pond area for small and medium agriculture. Therefore, it is possible to consolidate many reservoirs, which is the purpose of reorganization and maintenance of reservoirs, and to plan these in an integrated manner, and the project cost reduction effect for the time being is significant. In addition, the reduction of the burden of late costs can have a significant effect across generations. If the Tameike group built with the technology and wisdom at the time of opening was reorganized and maintained with pipes using modern technology and wisdom, the problems will be solved as a business that will remain in the future.
[0008]
Further, the third technical idea is as follows. There are no water purification facilities, and muddy water is directly introduced to the farmland for irrigation. Therefore, sludge is also flowing into the farmland. Therefore, if the sludge generated in the water source is not treated as industrial waste, and the sludge generated in the same water source is allowed to be used as a material for agricultural facilities in the same water source, the large cost required for sludge treatment is reduced. The problem will be solved.
2. Depending on the type of solidifying agent used in the sludge of the water source, the alkalinity may be high, and PH is an environmental problem, but if compared with the fertilizer used in farmland, it is a minute value Considering this, the problem will be solved if sludge is allowed to be used effectively as a material only within the same water system.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
《First technical idea》
1. It consists of reclamation leaving a shallow depth under the full surface of the basin to be abolished, and leaving the shape of the spillway as it is.
2. It consists of a drainage basin that is to be abolished on the ground surface that has been filled up to the full water surface or above the full water surface, and a spillway that is narrower than the current spillway that has a drainage outlet in the spillway.
《Second technical idea》
1. It consists of a water supply pipe, a water supply pipe and a pump, a water collection pipe, etc. that connect the abandoned reservoir and the integrated reservoir.
《Third technical idea》
1. It consists of a slope protection work where the sludge of the water source is hardened with a solidifying agent and attached to the slope.
2. It consists of a slope protection work with a water stop layer inside the slope.
3. It consists of a legal protection frame and a solidified mixed sludge.
4). Consists of sludge mixed with solidifying agent.
[0010]
【Example】
Examples of the present invention will be described below with reference to the drawings. However, the present invention is not limited to these examples.
[0011]
Fig.1 (a)-(d) is a process diagram of landfilling the solidification agent mixing sludge of the integrated basin in the abandoned basin, Fig.2 is a situation explanatory diagram of a general abandoned basin, and Fig.3 is a diagram of the abandoned basin Fig. 4 is an explanatory diagram with the former site of the abandoned basin as a square, and Fig. 5 is an explanatory diagram with the former site of the abandoned basin. FIG. 6 shows a situation where the water flows down as a flowing water flow. FIG. 6 shows that the abandoned basin 6b is located upstream of the same inflow water area 12a of the integrated basin 5 and the other inflow water area 12b of the integrated basin 5 is upstream of the integrated basin 5. The system of integration of the abandoned basin 6c, the abandoned basin 6d downstream of the integrated basin 5 and the basin of the abandoned basin 6e downstream of the other inflow water area 12c of the integrated basin 5 is shown.
[0012]
Since the present invention consolidates existing ponds, the results of consolidation / consolidation require the consent of downstream parties. Therefore, before explaining a specific method for maintaining and managing a basin, first contact the downstream parties. Will be described.
1. First, I will explain the functions of the current reservoir.
2. In other words, the small and medium sized ponds understand the current situation where the drainage is not adjusted artificially.
3. Next, ask them to understand that the basin before the flood has run out is full.
4). Understand that the amount of rainfall increases and the amount of water flowing in from the inflow water area 12 of the basin increases, the water level of the basin rises, and the overflow water depth 14 rises from the full water surface and drains at the width of the current spillway 3 Get it.
5. When the abandoned basin 6 is landfilled, the landfill surface 21 is the same as the full water surface 4 of the current basin, and it is understood that if the spillway is in the shape of the current state after the landfill, the flood volume will not be different from the current flood volume. Obtain the consent of downstream parties.
6). In addition, in order to use the landfill surface 21 as a plaza, a drainage channel 25 is installed, a notch 23 is provided in the spillway, and the corresponding flood volume is reduced to the landfill surface 21 by reducing the width of the current spillway 3. If the floor height 13 of the spillway 20 is made the same, it will be explained and understood that it will not be different from the current flood volume, and the consent of the downstream parties will be obtained.
[0013]
Example 1
In FIG. 1, the process of embanking the sludge of the integrated reservoir 5 in the abolished reservoir 6 will be described.
1. The gate 11 of the bottom tub pipe 2 of the integrated basin 5 and the abolished basin 6 is opened to drain the basin (FIGS. 1a ₁ and b ₁ ).
2. A solidifying agent is sprayed on the sludge 8 of the abandoned basin 6 and mixed by a backhoe or the like, followed by rolling with a roller or the like (FIG. 1b ₂ ).
3. After the solidifying agent is sprayed on the sludge 8 of the integrated reservoir 5 and mixed by a backhoe or the like, it is loaded onto a truck and transported to the abandoned reservoir 6 (FIG. 1a ₃ ).
4). The solidifying agent mixed sludge 51 carried into the abandoned basin 6 is rolled out to a certain thickness with a bulldozer or the like and rolled with a roller or the like (FIG. 1b ₃ ).
5. If sludge transportation of integrated basin 5 is completed close the gate 11 of the bottom trough tube 2 when water accumulates up to the full water level 4 (Fig. 1a _4). Furthermore, if inflow water continues from the flowing water area 12, it will flow from the current discharge spout 3 to the overflow water depth 14 and flow down to the downstream drainage channel 10 through the discharge channel 9 (FIG. 5).
6). The abandoned reservoir 6 is landfilled to the planned landfill surface 21 (FIG. 1b ₄ ).
[0014]
Example 2
Explain how to use the abandoned reservoir as a biotope.
1. The solidifying agent mixing sludge 51 is rolled with a roller or the like to the bottom of the planned landfill surface 21 (40 to 45 cm) and finished.
2. On top of this, the subsoil 56 is carried about 30 cm and rolled.
3. Further, 10 to 15 cm of the cultivated soil 57 is carried and leveled with a bulldozer or the like to form the planned landfill surface 21. If the planned landfill surface 21 is about 20 cm below the full water surface 4 of the abandoned reservoir 6, a biotope having a water depth 29 of about 20 cm is completed (FIG. 3).
[0015]
Example 3
Based on FIGS. 1 and 4, a method of utilizing the site as a square the above current state full water surface 4 of the abolition basin 6 shown in FIG. 2 as a plan landfill surface 21 (FIG. 4-a _{1, b 1).}
1. 1 to 4 of “Example 1” is embanked in the same process.
2. The solidification agent mixing sludge 51 is rolled by a roller or the like to the bottom of the planned landfill surface 21 to about 10 cm and finished.
3. On top of this, about 10 cm of normal soil is carried and rolled with a roller or the like to form the planned landfill surface 21.
4). The planned landfill surface 21 is above the current full water surface 4.
5. A small drainage channel 25 is installed below the planned landfill surface 21 in order to drain a small amount of drainage that always flows from the inflow water area 12 below the planned landfill surface 21. An outlet 23 is provided in the spillway for drainage corresponding to the drainage channel 25.
6). In order to reduce the amount of flood that increases by providing the cutout 23, the current spillway width 28 is reduced so that the improved spillway 20 has the same planned flood volume as the current flood volume.
7). The floor height 13 of the planned landfill 21 and the improved spillway 20 is the same.
8). If there is rainfall exceeding the flow capacity of the small drainage channel 25 installed on the planned landfill surface 21, the landfill surface 21 is temporarily flooded and cannot be used as a plaza.
[0016]
Example 4
Based on FIG. 6, an example of 5.1 integrated reservoirs and 6.5 abandoned reservoirs will be described.
Further, a case where the water storage amount of the abandoned reservoir 6 is secured by the integrated reservoir 5 will be described.
1. The abandoned basin 6a downstream of the integrated basin 5 having the same inflow water area 12 as the integrated basin 5 is irrigated using the existing irrigation channel 15 as before.
2. The abandoned basin 6b upstream of the integrated basin 5 having the same inflow water area 12a as the integrated basin 5 is provided with a pump 35 in the integrated basin 5 and supplied with a water pipe 33 for irrigation.
3. The abandoned basin 6c which has the other inflow water area 12b of the integrated basin 5 and is located above the integrated basin 5 is provided with a pump 35c in the integrated basin 5 and supplied with water by a water supply pipe 33 for irrigation.
Further, the water flowing out of the inflow water area 12b is collected in the water collecting tank 36b and collected in the integrated basin 5 through the water collecting pipe 34b.
4). The abolished basin 6a, which has another inflow water area 12b of the integrated basin 5 and is located below the integrated basin 5, is irrigated by supplying water from the integrated basin 5 through the water supply pipe 32.
5. The abandoned basin 6e, which has another inflow water area 12c of the integrated basin 5 and is located below the integrated basin 5, is irrigated by supplying water from the integrated basin 5 through the water supply pipe 32.
Further, the water flowing out of the inflow water area 12c is accumulated in the water collecting tank 36e, and is fed to the integrated reservoir 5 by the water feed pipe 33 by the pump 35e.
6). Thus, since the pipe and the pump 35 are “Kanpai business”, they have not been adopted as the “Tameike reorganization business”. However, by planning this together, the effect of the Tameike reorganization business is further increased.
[0017]
Example 5
Based on FIG. 7, the method of constructing slope protection after embankment 52 in advance will be described.
1. The embankment material 42 is rolled out with a constant thickness by a bulldozer or the like while being rolled with a roller or the like.
2. The slope 41 at the time of construction is cut into a temporary finish slope 43 and shaped.
3. After assembling the method frame 53, the solidifying agent mixed sludge 51 is applied as a crushed material, and the surface thereof becomes the finished slope 48.
[0018]
Example 6
Based on FIG. 8, a method of applying slope protection by simultaneously rolling the solidifying agent mixed sludge 51 simultaneously with the embankment material 42 will be described.
1. After the embankment material 42 and the solidifying agent mixed sludge 51 are rolled out to a certain thickness, they are simultaneously piled up to a predetermined height while rolling.
2. Next, the slope 41 at the time of construction is cut into a temporary finish slope 43 and shaped to obtain a finished slope 48.
[0019]
Example 7
Based on FIG. 9, the method of constructing the slope protection which provided the water stop layer 44 by simultaneously rolling the embankment material 42, the water stop layer material 44 and the solidifying agent mixed sludge 51 will be described.
1. The embankment material 42, the water blocking layer 44, and the solidifying agent mixed sludge 51 are piled up to a predetermined height while simultaneously rolling.
2. Next, the slope 41 at the time of construction is cut and shaped into a temporary finish surface 43 to obtain a finish slope 48.
[0020]
【The invention's effect】
The inventions of claims 1 to 8 having the above-described configuration are a method and an explanation method that are easy to understand that the amount of flood will not increase even after the abolition of the basin. The contribution effect is large, and since the influence on the downstream area is small, it is easy to obtain the understanding of the downstream parties.
The inventions of claims 9 to 15 can plan many reservoirs in the basin reorganization project by planning the basin reorganization project in the same project as the pipe, reducing public investment and reducing regional disasters. The effect of contributing to is great.
Furthermore, in the inventions according to claims 16 to 29, if the sludge generated in the water source is used as an agricultural infrastructure maintenance material in the same water system, the cost saving effect is great.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a process diagram for landfilling a solidification agent mixing sludge in an integrated reservoir in an abandoned reservoir. a is an integrated reservoir. b is an abandoned reservoir. a ₁ indicates the current state of the integrated basin. b ₁ shows the current state of the abolition pond. a ₂ shows the situation that drain water integrated basin. b ₂ denotes the draining of water abolition basin was pressurized rolling by mixing solidifying agent to sludge situation. a ₃ denotes a step of embankment to b ₃ carries the sludge. a ₄ shows the situation in which pooled water again after unloading the sludge integrated basin. b ₄ shows a situation where the embankment of the abolition pond was completed.
FIG. 2 is an explanatory diagram of the current situation of abolished reservoirs. a shows the entire reservoir, b shows the details of the spillway.
FIG. 3 is an explanatory diagram in the case where the site of the abandoned reservoir is a biotope. a shows the entire reservoir, b shows the details of the spillway.
FIG. 4 is an explanatory diagram in the case of using the abandoned pond site as a plaza. a shows the entire reservoir, b shows the details of the spillway.
FIG. 5 is an explanatory diagram of a situation where the water level rises from the full water surface due to inflow from the inflow water area of the pond and flows down from the spillway to the overflow water depth.
FIG. 6 is an explanatory diagram of the integration and abolition of a plurality of abandoned reservoirs.
FIG. 7 is an explanatory diagram of an example of a process using a slope of a slope.
FIG. 8 is an explanatory diagram of a process using a solidifying agent mixed sludge for protecting a slope.
FIG. 9 is an explanatory diagram of a process using a solidifying agent mixed sludge and a water blocking layer material for protecting a slope.
FIG. 10 is a cross-sectional view of an example in which an aggregate-containing solidifying agent mixed sludge is used for road pavement.
FIG. 11 is a cross-sectional view of an example in which aggregate is sprinkled on a roadbed of a solidifying agent mixed sludge and rolled to increase the frictional resistance value.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Embankment 2 Bottom dredging pipe 3 Current spillway 4 Full surface 5 Integrated basin 6 Abolition basin 7 Pond bottom 8 Sludge basin 10 Downstream drainage channel 11 Downstream drainage channel 11 Gate 12 Inflow basin height 13 Overflow depth 15 Existing water channel 16 Agricultural land 17 Land line 18 Current flood discharge height 19 Embankment surface 20 Improved spillway 21 Planned landfill surface 22 Reduced spillway width 23 Notch 24 Drainage channel bottom 25 Drainage channel 26 Thickness 27 Improved spillway width 28 Current flood discharge width 29 Biotope water depth 30 Water flow downstream water surface 32 Water supply pipe 33 Water supply pipe 34 Water collection pipe 35 Pump 36 Water collecting basin 41 Embankment 41 Embankment construction slope 42 Filling slope 43 Finishing slope 44 Water stop layer 45 Solidified mixed sludge roadbed material 46 Surface layer 47 浚 渫 48 Finish slope 49 Conventional slope protection work 50 Solidifying agent mixed sludge rolling force 51 Solidifying agent mixed sludge 52 Filling 53 Method frame 54 Paddy shore 55 Field method 5 Subsoil 57 Kodo 58 bone material containing a solidifying agent mixed sludge 59 base 60 aggregate

Claims (3)

A method for maintaining and managing a basin that retains the flood volume before landfill after the landfill of the abandoned basin ,
In order to improve the drainage of the landfill surface of the basin to be abolished, in order to reduce the flood volume corresponding to the increase in the flood volume due to the lack of drainage for the small inflow water that always flows A method for maintaining and managing a pond that reduces the width of spitting. A method for maintaining and managing a basin that retains the flood volume before landfill after the landfill of the abandoned basin,
In order to keep the height of the landfill surface below the level of the current full surface of the reservoir, a small drainage channel will be installed so that the small inflow volume that always flows in will be below the landfill surface, and there will be an opening in the spillway In order to reduce the increase in flood volume due to the lack, the method of maintaining and managing the basin reduces the spillway width so that the spillway height is less than the landfill level. A method for maintaining and managing a basin that maintains the total flood volume before landfill after landfill of abolished ponds,
In order to make the height of the basin more than the current full surface of the basin where the height of the landfill surface will be abolished, a small drainage channel will be installed so that the small inflow amount that always flows in will be below the landfill surface, and an opening will be provided in the spillway , its to reduce the increase flooding amount of missing outlet, by reducing the width of the spillway, maintenance and management method of the basin to the laying height of the spillway over the height of the landfill surface.

Images