JP2015074913A - Inflow sediment collection and discharge device and sediment discharge method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inflow sediment collection and discharge device which can be used for removing accumulated sediment in a reservoir such as a river, a pond, a lake or a dam lake with the inflow sediment collection and discharge device placed on an inflow point or a river bed of upstream point thereof, and to provide a sediment discharge method using the inflow sediment collection and discharge device.SOLUTION: An inflow sediment collection and discharge device 100 for collecting and discharging sediment which flows into water in a river, a pond or a lake, comprises: an upper opening section 11 which is arranged at about equal elevation to a surface of a river bed to receive inflow sediment; a collection container 10 which collects the sediment flowing thereinto through the upper opening section; a guide slope section 20 which gathers the collected sediment into a water intake of a discharge pipe to discharge the same; and the discharge pipe 30 which has a suction port to suck up the sediment in the collection container together with the water and discharge the same into downstream.

Description

  The present invention relates to an inflow earth and sand collecting and discharging device and an earth and sand collecting method using the inflow earth and sand collecting and discharging device.

  Lakes and dams are constructed for flood control and water use, and the water flowing in from upstream is blocked to form a reservoir. In this case, not only the water flowing from the upstream side is blocked, but also the earth and sand flowing out are blocked. The dammed sediment cannot accumulate in the bottom of the lake and flow out of the reservoir downstream. As a result, coarsening phenomenon appears in the riverbed of the river from the middle stream to the downstream, and the impact on the ecosystem has appeared. In addition, sand does not flow out to the estuary, so it is impossible to supply sand to the beach along the coastline, which affects the formation of the beach. Furthermore, since the amount of stored water has been reduced due to the influence of sediment deposited in the reservoir, and the function of achieving the purpose of the dam has also appeared, it has been necessary to perform dredging work to periodically remove the sediment. Therefore, an apparatus for removing sedimentary soil using siphon action has been developed. For example, a dredged sediment transport system for transporting sediments dredged in a reservoir into which river water flows from the reservoir to the sea or a river near the sea, and a siphon tube that sucks dredged sediment from a large-capacity reservoir together with water by siphoning And at least a natural flow path that is connected to the downstream end of the siphon pipe and that naturally flows the fluid containing dredged soil and water sucked out by the pipe to the sea or a nearby river using gravity. The natural flow path is interposed between a plurality of pipelines arranged in tandem with each other and adjacent pipelines, and temporarily stores the fluid flowing down from the upstream pipeline and stores it downstream. A transport system for dredged earth and sand is disclosed, characterized in that it has a relay dredger that can be discharged into the pipeline on the side.

  However, such a transport system is a type in which sediment that has once accumulated is moved through a pipe-shaped water suction port, and the soil is sucked together with water. When draining sand, the dredger is floated in the reservoir and piped deep into the bottom of the lake. Therefore, it is necessary to have a facility for sucking the sedimentary soil by hand, and a device for finely agitating the soil to suck in the sediment at the bottom of the lake. Moreover, it did not have the function to convey earth and sand before depositing.

JP 2006-241790 A

  Therefore, the present invention is a state in which a reservoir such as a river, a pond, a lake or a dam lake (a reservoir such as a river or a pond, a lake or a dam lake is hereinafter collectively referred to as a “reservoir or the like”) is placed on the river bed. The main purpose is to provide an inflow earth and sand collecting device that can be used in the present invention and an earth and sand collecting method using the inflow earth and sand collecting and discharging device.

  The present invention adopts the following means in order to achieve the main object described above.

The inflow sediment collection apparatus according to the present invention is an inflow sediment collection apparatus for collecting and discharging sediment flowing into a reservoir such as a river, pond, lake, dam lake,
An upper surface opening for receiving inflow sediment disposed at substantially the same height as the river bed surface;
A collection container for collecting earth and sand flowing from the upper surface opening,
A discharge pipe having an absorption port for absorbing and discharging with water to absorb the earth and sand in the collection container;
A water injection and merging member provided in the discharge pipe and capable of pouring water into the discharge pipe;
The water injection / merging member includes a water injection unit that can connect a water injection device that injects water into the discharge pipe, an absorption unit that absorbs soil and water flowing into the collection container, and the absorbed soil and water. A discharge part that drains in the downstream direction of the discharge pipe, and a structure branched in three directions, a state in which water from the water injection part can be discharged to the discharge part, and water from the absorption part to the discharge part The discharge unit, the water injection unit, and the absorption unit are respectively provided with switchgear that can be switched between a state in which the water can be discharged and a state in which water from the water injection unit can be discharged to the absorption unit. And

  By using such an inflow sediment collection and collection device, the sediment that flows out of the river during floods or during flat water is collected together with water at the inflow part before collecting and collecting the collected sediment. Can be moved to the downstream side of the reservoir, etc. by the siphon action, so the sediment once accumulated on the bottom of the reservoir, etc. can be moved downstream. Unlike the flow method, it is possible to reduce sedimentation of sediment on the lake bottom and river bed in the first place. In addition, if the inflow sediment collection apparatus according to the present invention is used, a part of the always inflowing sediment can be collected at the inflow portion to the reservoir and transported to the downstream portion of the reservoir using the siphon action. Therefore, there is no need for a large-scale device that sucks and discharges the sediment deposited on the bottom of a lake with a large-capacity absorption device while floating a large work boat. In comparison, a part of earth and sand can be collected and discharged by a relatively small siphon sand discharging device.

  Here, although the water supply pump which operates with motive power is common as a water supply apparatus, you may use the siphon water supply method using the water storage tank in patent 5220213. By adopting such a configuration, the siphon action can be activated by changing the direction of drainage by the opening / closing device provided in the water injection / merging member.

  Further, the water injection / merging member is provided at the intersection of the water injection part, the absorption part, the discharge part or in the vicinity thereof, and is capable of discharging water from the water injection part to the discharge part, and the absorption part It has a switchable switchgear that can switch between a state in which water from the water can be discharged to the discharge part and a state in which water from the water injection part can be discharged to the absorption part. There may be. By adopting such a configuration, the siphon action can be activated only by an operation of switching the switching opening and closing device provided in the water injection / merging member, and thereafter, water and earth and sand are siphoned without requiring artificial force. Can be transported by action.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the water injection pipe connected to the water injection section is composed of a flexible water injection hose, and when the forced water supply from the water injection apparatus is stopped, the water injection hose is pushed to atmospheric pressure. It may be characterized by having an opening / closing function by being closed. By adopting such a configuration, the opening and closing device of the water injection section provided in the water injection junction member can be omitted, and the siphon action can be activated without the need for a switching operation.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the collection container is provided with a sediment particle size sorting member having a mesh for sorting the size of the collected sediment. There may be. By providing the earth and sand particle size selection member having a mesh, it is possible to select the size of the earth and sand discharged from the discharge pipe, so that the possibility of clogging the discharge pipe can be reduced. The standard size of the mesh is about 5/10 to 1/10 of the diameter of the discharge pipe, but this range is set according to the grain size of the river bed of the river to be installed. It may be exceeded.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the sediment particle size selection member provided in the collection container may be inclined. By forming the sediment particle size sorting member into a slope shape, the spilled sediment is easy to roll, so that the function of the sieve is easily demonstrated, and the sediment that has not entered the collection container through the sediment particle size sorting member Without being deposited on the diameter selection member, it can be easily discharged to the downstream side of the inflow sediment collection device by gravity in addition to the river flow.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the sediment particle size selection member is provided with an inflow amount adjusting member for adjusting the amount of sediment and water flowing into the collection container. It may be a thing. The optimal amount of earth and sand is about 1 to 3% of the amount of water. Therefore, when there is too much earth and sand passing through the mesh of the grating serving as the earth and sand particle size selection member, the amount of inflow earth and sand with respect to the amount of water flowing into the collection container is set to 1 to 3 by providing an inflow amount adjusting member in stages. % Can be adjusted.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the mesh of the sediment particle size sorting member is composed of a comb-like sediment particle size sorting member formed in a comb-teeth shape opened on the downstream side, and the mesh is a flow It may be characterized by being arranged in the direction. That is, the mesh of the earth and sand particle size selection member is not a mesh that intersects vertically and horizontally, but comb-shaped comb teeth that do not connect downstream ends, such as comb teeth arranged in parallel to the flow, are formed. It may be a comb-shaped earth and sand particle size selection member. According to this structure, effluents such as pebbles and dead leaves flowing in from the upstream flow along the same comb teeth as the vertical flow, and the effluent flows to the reservoir downstream of the collection container without being caught at the downstream end. Go. Since it does not get caught in the horizontal mesh, it is reduced that the spillage remains on the sediment particle size sorting member and plugs the sediment inflow opening, so that the sediment can enter the collection container. can do. At this time, the comb tooth interval of the comb-shaped earth and sand particle size selection member may be a comb tooth interval of about 5/10 to 1/10 of the diameter of the discharge pipe.

  Further, in the inflow sediment collection apparatus according to the present invention, the downstream end of the comb-shaped sediment particle size selection member extends to the downstream side of the outer peripheral position or the outer periphery of the upper surface opening provided in the collection container. It may be characterized by being provided. By adopting such a configuration, it is possible to prevent dust and fallen leaves flowing on the upper surface of the comb teeth from falling into the collection container.

  The inflow sediment collection apparatus according to the present invention further includes a second comb-shaped sediment particle size selection member having a comb tooth interval that is narrower than a comb tooth interval of the sediment particle size selection member. The shaped earth and sand particle size selecting member may be installed so as to overlap an arbitrary area of the first earth and sand particle size selecting member. That is, for example, when the discharge pipe having a diameter of 100 mm is used, as a method for installing the comb-shaped soil particle size selecting member provided on the soil particle size selecting member, the comb of the comb-shaped soil particle size selecting member is used. A comb-shaped earth and sand particle size selecting member constituted by arranging teeth at a medium interval of about 30 mm is placed on the earth and sand particle size selecting member placing portion, and is piled on the upper portion from the upstream portion to make a finer comb. By installing a tooth-shaped sediment particle size sorting member and installing it at a downstream portion of the comb-shaped sand particle size sorting member having a medium comb tooth spacing, the amount of water inflow is reduced. It becomes a comb-like sediment particle size selection member that can be adjusted so that the amount of inflow of earth and sand is 2 to 3% of the whole without affecting 99% to 97% of the whole.

  Further, the third comb tooth-shaped soil particle size selecting member has a third comb tooth-shaped sand particle size selecting member having a comb tooth interval larger than the comb tooth interval of the comb tooth-shaped sand particle size selecting member, On the said 2nd earth-and-sand particle size selection member or the said 2nd comb-tooth-shaped earth-and-sand particle size selection member, it may be characterized by installing at intervals with an upstream end as a fulcrum. That is, by installing a comb-like soil particle size sorting member with a coarser spacing on a medium fine comb-like soil particle size sorting member, effluents such as wood chips and dead leaves can be removed to the above-mentioned medium fine size. It can be passed to the downstream side of the collection container without touching the comb-shaped sediment particle size selection member. Thereby, since effluents such as wood chips and dead leaves do not touch the medium-interval comb-shaped earth and sand particle size selection member, it can be prevented from being caught or clogged. As the installation method, the portion that becomes the comb joint of the earth and sand particle size selection member is formed by gradually increasing the angle with the upstream end of the mesh as a fulcrum and extending downstream to the downstream side. Also good.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the collection container includes an upper frame having the upper surface opening configured to be removable, and the upper frame includes the upper frame and the collection container. It may be characterized by having a function as a bulky member capable of adjusting the position of the uppermost upper frame by placing another upper frame between the upper end portion. . By adopting such a configuration, when sediment is deposited on the river bed around the inflow sediment collection device and the river bed surface rises, the upper frame is overlapped with this rise, so that the position of the upper surface opening is adjusted. Can be adjusted.

  Furthermore, in the inflow earth and sand collecting and discharging apparatus according to the present invention, the inflow earth and sand collecting and discharging device includes a water wheel disposed upstream of the collection container, and the water wheel is configured to remove the earth and sand flowing in by the blades of the water wheel while rotating by the water flow. You may be characterized by sending to the direction. That is, when the water wheel rotates by the flow, the blades of the water wheel carry the sediment of the riverbed in the direction of the collection container, and the earth and sand can be effectively conveyed to the collection container.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the water wheel is capable of excavating the river bed to form a recess in the river bed, and sending the excavated sediment and the sediment flowing into the recess to the collection container. It may be a feature. In other words, earth and sand recesses are formed in the scoured riverbed. Since the slope on the upstream side of the recess becomes steep, the upstream river bed is pushed by the flow and flows into the recess. As the water turbine rotates due to the flow, the blades of the water turbine carry the sediment on the river bed while gradually excavating the sediment on the river bed, and a concave portion of earth and sand is formed in the scoured river bed. Since the slope on the upstream side of the recess becomes steep, the upstream river bed is pushed by the flow and flows into the recess. The operation of moving the earth and sand in the direction of the collecting container with the blades by the rotation of the water wheel is continued.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the water wheel may be movable up and down. The sediment on the riverbed is swept away and flows in at the time of flooding, but the riverbed stabilizes and the inflow phenomenon of the sediment decreases at the level of the flat water level, so the amount of sediment on the riverbed flows into the collection container. Decrease significantly. That is, sediment collection and discharge work cannot be performed. In such a case, as described above, the water wheel is installed on the upstream side of the collection container, and the blades are installed in such a manner that the blades can be sequentially moved up and down according to the inflow situation of the earth and sand. It will be possible to collect and discharge. By forming a recess in the riverbed as a result of this work, even if sediment flows in at a time in the event of a flood, the recess in the riverbed becomes a pocket and a large amount of sediment flows into the reservoir downstream from the collection container. Can be reduced. In the case of a flood, it is possible to prevent a direct hit from the flood by moving the water wheel upward. When performing sediment collection and discharge work again, by moving the water wheel sequentially downward while rotating the water wheel, it is possible to create a recess by gradually moving the sediment toward the collection container while excavating the sediment on the riverbed. Therefore, the collection and discharge work can be easily restarted.

  Furthermore, in the inflow sediment collection apparatus according to the present invention, the water injection / merging member includes a branch part formed between the water injection part and the water absorption part, and the water from the water injection apparatus is supplied to the downstream side or the upstream side. There may be provided a switching valve for switching the flow to. By adopting such a configuration, gravel accumulated in the collection container can be efficiently discharged out of the collection container, and the possibility that the collection container is clogged with earth and sand can be prevented.

  Further, in the inflow sediment collection apparatus according to the present invention, the water injection / merging member is provided with an automatic return on-off valve at a boundary between the branch portion and the water absorption portion, and the automatic return on-off valve is applied with force. In a state where it is not, it may be characterized by being biased so as to close the opening at the boundary between the branch portion and the water absorption portion. By adopting such a configuration, it is possible to prevent the possibility that the water of the stop device will flow downstream when it is desired to flow upstream. Further, when the siphon is restarted, it automatically returns to the original position, so that the flow due to the siphon action is not hindered.

  By using such an inflow sediment collection device, the water or sediment inlet or particle size selector provided in the inflow sediment collection device is embedded so as to appear on the riverbed surface of the buried land, It is possible to discharge the earth and sand that has flowed into the downstream of the water storage section and the like through the discharge pipe together with water from the discharge section through natural discharge or siphon function.

  Furthermore, the method for installing the inflow sediment collection apparatus according to the present invention is characterized in that the collection container is installed at a location where the water flowing through the river flows into the reservoir or upstream upstream. Good. At that time, excavate the downstream bed of the collection container to form a sediment reservoir, or collect the collection container so that the height of the opening of the collection container is the same as the height of the water passage of the river structure. The container may be characterized in that it is provided with a sediment reservoir formed by providing a step portion on the downstream side of the river structure, and a floor stop or the like in the downstream portion of the collection container. A river structure may be provided, and a step portion may be provided by the river structure to form a sediment reservoir.

FIG. 1 is a perspective view showing a configuration of an inflow soil collecting apparatus 100 according to the first embodiment. FIG. 2A and FIG. 2B are schematic diagrams illustrating a method of using the inflow soil collection and discharge device 100 according to the first embodiment. 3A and 3B are schematic views showing another method of using the inflow soil collection and discharge device 100 according to the first embodiment. 4A and 4B are schematic views showing another method of using the inflow soil collection and discharge device 100 according to the first embodiment. FIG. 5 is a schematic diagram showing that the earth and sand particle size selection member 40 is fixed by a hinge so as to be opened and closed in the first embodiment. FIG. 6 is a schematic diagram showing a sediment particle size selection member 40 in which the upper surface opening 11 is formed on an inclined surface in the inflow sediment collection apparatus 100 according to the second embodiment. FIG. 7A shows a comb-like soil particle size having a basic comb tooth of three-tenths of which the comb-teeth interval is about 5/10 to 1/10 of the diameter of the discharge pipe as a guide for the particle size selection member. FIG. 7B is a schematic diagram of the sorting member 40a, and FIG. 7B shows the second comb-shaped sand particle size sorting of the comb teeth 41 that are thinner than the basic comb teeth in order to adjust the ratio of the amount of sediment and water flowing into the collection container. FIG. 7C is a schematic diagram showing the member 40b, and FIG. 7C is a diagram showing a third comb-like soil particle having comb teeth with coarser spacing than the basic mesh so that coarse effluent does not stay on these sediment particle size selection members. It is a schematic diagram which shows the diameter selection member 40c. FIG. 8 is a schematic diagram showing a configuration in the case where the second comb-shaped earth and sand particle size selecting member 40b and the third earth and sand particle size selecting member 40c are provided on the upper portion of the comb-like earth and sand particle size selecting member 40a of the basic mesh. is there. FIG. 9 is a cross-sectional view illustrating a configuration of the inflow soil collection and discharge device 100 according to the third embodiment. FIG. 10 is a cross-sectional view illustrating a configuration in which a water wheel 70 is provided on the upstream side of the collection container 10 of the inflow soil collection and discharge device 100 according to the fourth embodiment. FIG. 11: is a schematic diagram which shows the water injection confluence | merging member N structure of the inflow sediment collection apparatus 100 concerning 5th Embodiment. FIG. 12 is a schematic diagram illustrating a method of using the inflow soil collection and discharge device 100 according to the fifth embodiment. FIG. 13 is a schematic diagram illustrating a configuration in which the collection container 10 of the inflow soil collection and discharge device 100 according to the sixth embodiment is disposed in the water passage portion of the river structure 81. FIG. 14 shows a method of forming a sediment reservoir on the downstream side of the collection container by providing a step portion using a river structure downstream of the collection container 10 of the inflow sediment collection apparatus 100 according to the sixth embodiment. It is a schematic diagram shown.

  An embodiment of an inflow sediment collection apparatus 100 according to the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and do not depart from the gist of the present invention. Can be changed as appropriate. Corresponding components in the drawings are given the same or similar reference numerals.

(First embodiment)
FIG. 1 shows a perspective view of an inflow soil collecting and discharging apparatus 100 according to the first embodiment. The inflowing earth and sand collecting and discharging device 100 according to the first embodiment communicates from the inside of the collecting container 10 to the outside, the collecting container 10 that collects the inflowing earth and sand, the guiding inclined portion 20 disposed in the collecting container 10. The discharge pipe 30, the earth and sand particle size selection member 40 disposed on the upper surface of the collection container 10, and the water injection and merging member 50 connected to the discharge pipe 30 are mainly provided.

  The collection container 10 is a container for collecting and discharging earth and sand flowing into a water storage part such as a river flooding part, pond, lake, dam, etc. in a river, and its form is not particularly limited, and is cylindrical. Or a rectangular parallelepiped may be sufficient. Further, the discharge pipe itself may be provided with a collection opening so as to have the function of a collection container. In the first embodiment, a description will be given using a rectangular parallelepiped collection container 10. The collection container 10 is formed with an upper surface opening 11 having an open top for collecting the inflowing earth and sand. The upper surface opening 11 is loaded with a sediment particle size selection member 40 to be described later. A placement unit 12 is provided. In the collection container 10, a guiding inclined portion 20 for efficiently guiding the earth and sand to the discharge pipe 30 is provided.

  As shown in FIG. 1, the guiding inclined portion 20 includes two first inclined plates 21 and a first inclined plate 21 inclined so as to become lower from the end toward the center in order to collect earth and sand that have fallen into the collecting container 10. It consists of two inclined plates 22. One first inclined plate 21 is formed of a plate inclined to the bottom surface, and the other second inclined plate 22 is formed on a vertical surface so that the discharge pipe 30 can be connected after being inclined halfway. The arrangement of the guiding inclined portion 20 varies depending on the position of the water inlet 30 </ b> S at the tip of the discharge pipe 30. For example, when the position of the water inlet 30S is provided at the lower end portion 10b of the collection container 10, the guiding inclined portion 20 has the guiding inclination function 1 by extending the first inclined plate 21 to the vicinity of the lower end portion 10b of the collecting container 10. Can be demonstrated with a sheet.

  The earth and sand particle size selection member 40 has a grating shape having a mesh, and the earth and sand collected by dropping into the collection container 10 and other large stones or garbage can be separated according to the size of the mesh. As a measure of the mesh size, it should be in the range of 5/10 to 1/10 of the diameter of the discharge pipe, and 10 minutes of the diameter of the discharge pipe, depending on the particle size of the sediment in the river. Consider the size of 3 as a basic shape. The inflow amounts of water and earth and sand can be adjusted by attaching the inflow amount adjusting members 29a and 29b that can change the area of the mesh portion of the sediment particle size selection member 40. As for the amount of earth and sand, the ratio of earth and sand with respect to the sum of water and earth and sand is set to about 1 to 3%, and if it increases by 3.5% or more, the discharge pipe 30 may be clogged. Then, when there is too much earth and sand entering the collection container 10 through the mesh of the grating, the inflow earth and sand are adjusted to enter the collection container 10 by providing the inflow amount adjusting members 29a and 29b in stages. be able to. In the present embodiment, the two types of inflow amount adjusting members having different sizes are provided. Of course, three or more types of shapes having different sizes may be used.

  The discharge pipe 30 is made of metal, chemical resin, chemical fiber, or the like, and the earth and sand and water flow through the pipe by siphon action or natural flow. The pipe in the discharge port direction at the downstream end of the discharge pipe 30 In the middle, a water injection / merging member 50 is connected.

  The water injection / merging member 50 absorbs water and a water injection part 51 connected to a water injection device 90 such as a pump capable of forcibly injecting water into the discharge pipe 30, and earth and sand flowing into the collection container 10. It has a structure branched in three directions: an absorption part 52 and a discharge part 53 that drains absorbed soil and water in the downstream direction of the discharge pipe 30. Moreover, the water injection / merging member 50 may be provided with an opening / closing device in all of the water injection part 51, the absorption part 52 and the discharge part 53, and the flow from the water injection part 51 and the absorption part 52, as shown in FIG. 2. 2A, and a state where the flow from the water injection part 51 can flow to the discharge part 53 as shown in FIG. 2A, and from the absorption part 52 as shown in FIG. 2B. It can be switched between a state in which earth and sand and water can flow to the discharge part 53 and a state in which the flow from the water injection part 51 can flow to the water inlet 30S as shown in FIG. 4A.

  Although it does not specifically limit as a pipe material connected with the water injection part 51 from the water injection apparatus 90, As shown to FIG. 2B, it is good to use the water injection pipe 60 which consists of flexible materials, such as a sunny hose. This is because when forced water supply from the water injection device 90 or the like stops, it can be replaced with an on-off valve that prevents air from entering without being provided with an on-off valve by being pushed down by the atmospheric pressure and squeezed.

  The inflow sediment collection apparatus 100 produced as described above is used as follows. First, as shown in FIG. 2A, the upper surface opening 11 of the collection container 10 is buried in a place where the outflow soil is likely to accumulate so as to be the same height as the surface of the river bed. On the other hand, the downstream end serving as a discharge port (not shown) of the discharge pipe 30 is piped to an arbitrary place where earth and sand are to be discharged at a position lower than the water surface where the collection container 10 is installed. Further, a water injection / merging member 50 is installed in the middle of the discharge pipe 30. A flexible water injection pipe 60 such as a sunny hose is attached to the water injection part 51 of the water injection / merging member 50, and a water injection device 90 such as a water storage tank or a submersible pump capable of forcibly injecting water is attached to the opposite side. Thus, the installation of the inflow soil collection and discharge device 100 is completed.

  From this state, as shown in FIG. 2A, first, the switching opening / closing device 55 of the water injection / merging member 50 is set so that the water from the water injection device 90 flows from the water injection portion 51 to the discharge portion 53, and forced using the water injection device 90. Inject water. Thus, the water poured from the water pouring device 90 flows to the water pouring pipe 60, the water pouring / merging member 50, and the downstream discharge pipe 30b. Then, after confirming that water injected using the water injection device 90 is discharged from a discharge port (not shown) at the downstream end of the discharge pipe 30, the forced water injection of the water injection device 90 is stopped and switched at the same time. The position of the opening / closing device 55 is switched so that water flows from the absorption unit 52 to the discharge unit 53. Thereby, in the process in which the water in the downstream discharge pipe 30b is dropped as it is, the water injection pipe 60 is pushed down to the atmospheric pressure by the forced water injection from the water injection device 90 being stopped as shown in FIG. 2B. It will be. Thereby, from the water injection part 51, inflow of water and air is prevented, and the water injection part 51 is closed. Thereafter, the water in the downstream discharge pipe 30b becomes priming water and flows downstream, and at the same time, the water and earth and sand in the collection container 10 are drawn into the upstream discharge pipe 30a. Then, the water of the river or the like flows to the downstream discharge pipe 30b through the collection container 10, the upstream discharge pipe 30a, and the water injection / merging member 50, and thereafter gives artificial force by siphon action. Instead, the water will flow downstream. By this flow, the earth and sand that have flowed into the collection container 10 are also involved and flow to the downstream side through the discharge pipe 30 together with water.

  Next, a method of restarting the siphon when the flow rate of a river or the like is reduced, the inflow sediment collection device 100 is stopped, and sediment has accumulated in the collection container 10 will be described. Once the flow rate of the river or the like decreases and the siphon flow stops, earth and sand may accumulate in the collection container 10 as shown in FIG. 3A. In the stop state, neither the discharge pipe 30 nor the water injection pipe 60 has water. When the river flow is restored from this state, the siphon function is restored by the following procedure. First, the switching opening / closing device 55 is switched, and first, the switching opening / closing device 55 of the water injection / merging member 50 is set so that the water from the water injection device 90 flows from the water injection unit 51 to the discharge unit 53. Water is forcibly injected from the water injection device 90, and the water is filled up to the downstream end of the water injection pipe 60 and the downstream side discharge pipe 30b. From this state, as shown in FIG. 4A, the switching opening / closing device 55 is switched so that the water from the water injection device 90 flows to the upstream discharge pipe 30a. Then, the earth and sand accumulated in the collection container 10 is rolled up, and the earth and sand are diffused. In this state, the switching switch 55 is switched so that water from a river or the like passes through the upstream discharge pipe 30a and flows from the absorption section 52 to the discharge section 53 and the downstream discharge pipe 30b. Stop pouring water. Thereby, in the process in which the water of the downstream discharge pipe 30b falls, the water injection pipe 60 is pushed down to atmospheric pressure and squeezed by stopping the forced water injection from the water injection device 90 as shown in FIG. 4B. become. Thereby, from the water injection part 51, inflow of water and air is prevented, and the water injection part 51 is closed. Thereafter, the water in the downstream discharge pipe 30b becomes priming water and flows downstream, and at the same time, the water and earth and sand in the collection container 10 are drawn into the upstream discharge pipe 30a from the absorption port 30s. That is, the water such as rivers and the earth and sand rolled up flow to the downstream discharge pipe 30b through the collection container 10, the upstream discharge pipe 30a, and the water injection / merging member 50. Water and earth and sand are allowed to flow downstream without giving a strong force. When the sediment accumulated in the collection container 10 is agitated or discharged from the collection container 10, as shown in FIG. 5, the sediment particle size selection member 40 of the collection container 10 can be opened and closed by a hinge 29c on the upstream side. By fixing, the sediment particle size selection member 40 is opened on the downstream side with the hinge 29c as a fulcrum by forced water supply from the water injection device 90, so that the sediment accumulated in the collection container 10 can be easily discharged out of the collection container 10. be able to.

  As described above, according to the inflow sediment collection apparatus 100 according to the first embodiment, the sediment of the riverbed that is about to flow into the reservoir sequentially using the siphon action is collected in front of the reservoir and the like. Unlike the method of flowing sediment once deposited on the bottom of the lake to the downstream side of the reservoir, sediment deposition on the lake bottom of the reservoir can be reduced in the first place because the sediment can flow to the downstream side. At this time, the inflow soil collecting and discharging apparatus 100 according to the first embodiment is provided with an opening / closing device in the water injection part 51 or by using a flexible material for the water injection pipe 60 connected to the water injection part 51. The siphon action can be activated by performing an operation of switching the switching opening and closing device 55 provided on the member 50. In addition, when working as a sediment removal method when the collection container 10 is clogged with spilled sediment, using the water injection device 90, the water collected in the collection container 10 from the water injection unit 51 to the collection container 10 side is collected in the collection container 10. When removing soil and sand, the water injection section 51, the absorption section 52, and the discharge section 53 are provided with on-off valves and the like, and the clogged sediment removal workability is improved by opening and closing timely.

  Moreover, according to the inflow sediment collection apparatus 100 concerning 1st Embodiment, since the sediment particle size selection member 40 which has a mesh member is provided in the upper surface opening part 11, the magnitude | size of the sediment discharged by the discharge pipe 30 is shown. As a measure of the mesh size, it should be in the range of about 5/10 to 1/10 of the diameter of the discharge pipe, and it depends on the particle size of the river sediment. However, a size of 3/10 of the diameter of the discharge pipe may be considered as a basic shape. In addition, the inflow amount adjusting members 29a and 29b can also be used to adjust the inflow amount of water into the collection container. Therefore, when the amount of water and earth and sand moved together with the water by siphon action is 100%, the earth and sand occupy. By adjusting the ratio to about 2 to 3%, the work efficiency can be improved and the possibility that the discharge pipe 30 is clogged can be reduced.

  Moreover, according to the inflow earth and sand collecting and discharging apparatus 100 concerning 1st Embodiment, since the inclination part 20 for guidance is provided in the collection container 10, earth and sand can be efficiently guide | induced to the inlet of a discharge pipe.

  In addition, even when the water level is once lowered and the siphon action is stopped, the water from the water injection device 90 can be made to flow backward. Therefore, when the earth and sand accumulated in the collection container 10 is small, the water can be efficiently wound up. Since it can stir, it can be made to restart without performing the operation | work which discharges the earth and sand in the collection container 10 by discharging to the discharge outlet of a downstream with water with stirring. In addition, when a large amount of earth and sand is accumulated in the collecting container 10 and clogs, it is discharged from the earth and sand particle size selecting member 40, or the earth and sand particle size selecting member 40 is pushed open by water pressure and discharged and removed from the opening. After that, the earth and sand flowing into the collection container together with the water can be moved to the downstream side of the reservoir and discharged by a normal siphon action.

(Second Embodiment)
An inflow soil collecting and discharging apparatus 100 according to the second embodiment is shown in FIG. Drawing 6 is a mimetic diagram seen from the side of inflow sediment collection device 100 concerning a 2nd embodiment. As shown in FIG. 6, the inflow sediment collection apparatus 100 according to the second embodiment has an upper surface opening 11 formed on a slope. Other configurations are the same as those of the first embodiment. By forming the sediment particle size selection member 40 on the slope in this manner, the outflow soil is easy to roll. Therefore, the sediment particle size selection member 40 described later can easily function as a sieve. Sediment that has not passed through the mesh can be pushed to the downstream side by gravity in addition to boosting the river flow. For this reason, it is possible to reduce the possibility that the earth and sand that has not entered the collection container 10 without passing through the mesh of the earth and sand particle size sorting member 40 will remain on the mesh of the earth and sand particle size sorting member 40 and the mesh will be buried.

  If the mesh size of the sediment particle size sorting member 40 is large and there is a large inflow of sediment due to flooding or the like, the balance of 1 to 3%, which is the ratio of the amount of sediment with respect to the amount of water, will be lost and a large amount of sediment will flow in. It will be clogged with earth and sand. In addition, since dead leaves and twigs that flow in from upstream are clogged with the mesh of the sediment particle size sorting member 40, a phenomenon occurs in which dust is covered by the upper surface opening 11. As an installation member and an installation method for preventing these phenomena, the mesh of the sediment particle size selection member 40 is not in a mesh shape that intersects vertically and horizontally, as shown in FIG. It is preferable to use a comb tooth 41 that does not connect the downstream ends, such as a comb tooth shape arranged side by side, that is, a comb-shaped soil particle size selection member 40a formed by opening the downstream side. According to this structure, effluents such as pebbles and dead leaves that have flowed in from the upstream flow along the same comb teeth 41 as the vertical flow, and the effluent does not get caught at the downstream end of the comb teeth 41 and is collected. It flows downstream without being absorbed. Since it does not get caught in the horizontal mesh, the spilled material remains on the upper surface opening 11 of the soil inflow due to the absorption of water into the collection container 10 like the mesh sediment particle size selection member 40 and the upper surface. Since the opening 11 is not blocked and the residue of the effluent is reduced, an opening for the earth and sand to enter the collection container 10 can be secured.

  In addition, as a method of installing the comb-shaped sediment particle size selecting member 40a provided as the soil particle size selecting member, the interval between the comb teeth 41 of the comb-shaped soil particle size selecting member 40a is 5/10 of the diameter of the discharge pipe 30. To a range of about one-tenth, depending on the sediment particle size of the river to be installed, and a basic comb tooth-shaped sediment particle size selection member 40a with a basic interval of about three tenths of the diameter of the discharge pipe 30, After the basic comb-shaped earth and sand particle size selecting member 40a is placed on the mounting portion 12 of the comb-shaped earth and sand particle size selecting member, as shown in FIG. By installing the comb-shaped earth and sand particle size selecting member 40b on the basic comb-shaped earth and sand particle size selecting member 40a so as to overlap an arbitrary area (see FIG. 8), the inflow amount is 99% to 97% of water. Therefore, it is possible to adjust the earth and sand to a ratio of about 1% to 3%.

  Further, as shown in FIG. 7C, the third comb-tooth-shaped sediment particle size sorting member 40c having coarse comb teeth larger than the basic comb-tooth 41 on the basic comb-tooth-like soil particle size sorting member 40a and the like. By installing the slag, spilled material such as wood chips and dead leaves can be passed to the downstream side of the collection container 10 without touching the basic comb-shaped earth and sand particle size selecting member 40a. As a result, it is possible to prevent spilled material such as wood chips and dead leaves from being caught or clogged on the surface of the basic comb-shaped earth and sand particle size selection member 40 a installed in the upper surface opening 11 of the collection container 10. As an installation method, there is a method (not shown) of installing a basic comb-shaped earth and sand particle size selecting member 40a with an interval between them, and as shown in FIG. A configuration may be adopted in which the upstream side end portion is used as a fulcrum and the downstream side angle is increased to gradually extend the downstream side at intervals. In this case, the comb teeth 41 are easily expressed as a basic interval of about one third of the diameter of the discharge pipe 30, but the reference interval of the comb teeth 41 is 10 times the diameter of the discharge pipe 30. Regardless of 3 minutes, the inflow sediment collection and discharge device 100 may be set to an arbitrary size corresponding to the size of the specific outflow such as the particle size of the sediment constituting the river bed of the river. . As shown in FIG. 7, the comb-shaped earth and sand particle size selecting members 40a and 40c have a downstream end of the comb-shaped earth and sand particle size selecting member on the downstream side of the upper surface opening provided in the collection container. It may be provided extending downstream from the position or outer periphery. By adopting such a configuration, it is possible to reduce the possibility that spilled material such as wood chips and dead leaves will fall into the collection container, and efficiently carry it downstream.

(Third embodiment)
An inflow soil collecting and discharging apparatus 100 according to the third embodiment is shown in FIG. FIG. 9 is a cross-sectional view of the inflow soil collection and discharge device 100 according to the third embodiment. The inflow sediment collection apparatus 100 according to the third embodiment is different from the first embodiment in that the upper surface opening 11 of the collection container 10 is formed on the upper frame 13 which is a separate member. Other configurations are the same as those of the first embodiment. The upper frame 13 is detachably formed above the collection container 10. On the upper surface of the upper frame 13, a placement portion 13 a is provided for placing the sediment particle size selection member 40. Further, the upper frame 13 is formed so that the upper frames 13 can be fixed in an overlapping manner. Therefore, the upper frame 13 has a function as a bulky member capable of adjusting the position (height) of the sediment particle size selection member 40.

  When the upper frame 13 is provided, when the sediment accumulates on the river bed around the inflow sediment collection apparatus 100 and the river bed surface rises, the upper frame 13 is overlapped in accordance with the rise so that the upper surface opening portion is overlapped. The position of 11 can be adjusted. By adopting such a configuration, even if sediment is deposited on the river bed, it can be used without changing the position of the collection container 10.

(Fourth embodiment)
FIG. 10 shows a state where the inflow sediment collection apparatus 100 according to the fourth embodiment is installed. As shown in FIG. 10, by providing a water wheel 70 upstream of the collection container 10, the blade 70 a of the water wheel 70 collects sediment and sand flowing from the upstream by rotating the water wheel 70 by the flow of water. It can be carried in the direction of the container 10. Further, at this time, a recess 73 is formed in the river bed by scouring, and a river bed surface 72 formed by scouring by the water turbine 70 having a steep slope is formed on the upstream side thereof, so the upstream river bed flows out and is recessed. It becomes easy to flow into 73. By continuing the operation of moving the earth and sand in the direction of the collection container 10 with the blades 70a by the rotation of the water wheel 70, the earth and sand can be easily discharged continuously. The sediment on the river bed is pushed into the water and flows in at the time of flooding. However, if the flow becomes a flat water level, the flow velocity will decrease and the sediment flowing into the river bed will also decrease. As a result, the sediment collection work cannot be performed. In such a case, as described above, the water wheel 70 is provided on the upstream side of the collection container 10 and the blades 70a are installed so as to be lower than the height of the river bed, whereby a recess 73 is formed in the river bed by rotation. Since the gradient on the upstream side of the formed recess 73 is not a stable gradient, scouring is performed by the inflowing flow, and the outflow proceeds to the upstream side sequentially, and the earth and sand flows into the recess 73. Therefore, the operation of moving the earth and sand from the recess 73 toward the collection container 10 by the rotation of the water wheel 70 is continued. As a result of this action, it is possible to collect sediment from the riverbed even during flat water. The concave portion 73 formed by this operation and the concave portion 73 of the river bed including the scouring portion formed by the outflow of the sediment on the upstream side from the concave portion 73 become the concave portion 73 of the river bed, and from the upstream when the next flood occurs Even if the earth and sand flow out at a stretch, the concave portion 73 of the river bed becomes a pocket to stop and deposit the inflowing earth and sand, so that the inflow of earth and sand into the reservoir downstream from the collection container 10 can be reduced. It is to be noted that the collection work of the earth and sand can be continued by sequentially moving the water wheel 70 downward in accordance with the degree of the depression 73 of the earth and sand, and the water wheel 70 can be moved by moving the water wheel 70 upward during a flood. Can be prevented from being hit directly by the flood. When the sediment collection work is carried out again, the water wheel 70 is rotated and moved sequentially downward, so that the depression 73 can be formed in the river bed by gradually digging up the sediment on the river bed. Restarting can be easily performed.

(Fifth embodiment)
FIG. 11 shows a state in which the water injection / merging member 50 of the inflow sediment collection apparatus 100 according to the fifth embodiment is installed. The water injection and merging member 50 according to the fifth embodiment includes a branch portion 56 between the water injection portion 51 and the water absorption portion 52. Furthermore, between the water injection part 51 and the branch part 56, the water poured into the water injection part 51 from the water injection apparatus (not shown) manually or automatically is arranged downstream and upstream, that is, from the water injection part 51 to the drain part 53. And a switching valve 57 that can be switched to a flow direction from the water injection part 51 to the water absorption part 52 via the branch part 56. Further, when no force is applied to the boundary between the branch portion 56 and the water injection portion 51 by a spring or the like, the opening 50 a of the branch portion 56 is closed at the boundary between the branch portion 56 and the water absorption portion 52. An automatic return type open / close valve 58 is provided, which is attached so that the opening 50a can be opened when there is a flow of water from the branch portion 56 to the water absorption portion 52.

  As shown in FIG. 12A, the water injection / merging member 50 according to the fifth embodiment has a large amount of earth and sand with respect to the amount of water when the earth and sand particle size selection member 40 has a large mesh and floods or the like. Since the balance of 1 to 3%, which is the ratio, is lost and a large amount of earth and sand flows in, the collection container 10 is clogged with earth and sand. In such a situation, as shown in FIG. 12B, the switching valve 57 of the water injection / merging member 50 closes the water injection part 51, and the water from the water injection device 90 is upstream, that is, the water supply part 51 is branched from the water injection part 51. Then, water is poured from the water pouring device 90 in a state where the flow direction has been switched to the water absorption part 52. Then, the automatic return type on-off valve 80 is opened by the water pressure at the branch portion opening 50a, blocking the flow direction to the downstream side and feeding water to the upstream side. Thereby, the gravel in the collection container 10 etc. will be discharged | emitted out of the collection container 10 by water pressure. When the gravel in the collection container 10 is discharged out of the collection container, the water injection operation is stopped. By stopping this water injection work, the automatic return type on-off valve 80 that has been pushed open again closes the opening 50a of the branching portion 56 by the spring. Therefore, as shown in FIG. 12C, water and gravel can be made to flow from the collection container 10 again by the siphon action.

  According to the inflow earth and sand collecting and discharging apparatus 100 according to the fifth embodiment, water can be poured from the water injecting apparatus 90 into the container device 10 and the earth and sand accumulated in the collecting container 10 can be discharged from the collecting container 10. The time interval for performing the water injection operation for discharging the sediment in the collection container 10 by temporary water injection operation may be regular or irregular. Especially during floods, the inflow of earth and sand into the collection container 10 increases, so that the balance of 1 to 3%, which is a good ratio of the amount of earth and sand with respect to the amount of flowing water, is lost, and the earth and sand accumulate in the collection container 10. Since the siphon action may stop, it is desirable to perform the water injection work periodically with a short interval. As a method of starting the water injection device 90 for performing this regular or irregular water injection operation, a human operation may be used, but when a river level sensor is used to detect a case where the water level is above a certain level. By performing the sediment discharge operation at regular or irregular intervals, it is possible to continue the sand discharge operation by the siphon without stopping the siphon action because the inflowing sediment is accumulated in the collection container 10 too much.

(Sixth embodiment)
FIG. 13 shows a state where the inflow sediment collection apparatus 100 according to the sixth embodiment is installed. As shown in FIG. 11, the collection container 10 is placed in the water passage portion of the river structure 81 so as to provide a stepped portion 80 on the downstream side of the river structure, so that the earth and sand particles as in the second embodiment. Sediment that has not passed through the mesh of the diameter sorting member 40 and has not entered the collection container 10 can be easily discharged to the downstream side of the sediment particle size sorting member 40. That is, a step portion formed on the downstream side of the river structure if the earth and sand that does not pass through the mesh of the earth and sand particle size selection member 40 and does not enter the collection container 10 flows to the downstream side of the earth and sand particle size selection member 40. Since it falls to 80, it is possible to reduce the possibility that the flowing earth and sand will be blocked by the earth and sand staying on the earth and sand particle size selection member 40 and remain on the mesh in the same manner, thereby closing the mesh. Further, as shown in FIG. 14, by providing a river structure 81 on the downstream side of the collection container 10, a step 80 is provided on the downstream side of the collection container 10, and the upper surface of the sediment particle size selection member 40 passes downstream. An earth and sand reservoir 82 for accumulating earth and sand can be formed.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  As shown in the above-described embodiment, it can be used as an apparatus for transporting sediments in rivers and the like to the downstream side of river structures that cross rivers.

DESCRIPTION OF SYMBOLS 10 ... Collection container, 10b ... Lower end part, 11 ... Upper surface opening part, 12 ... Mounting part, 13 ... Upper frame, 13a ... Mounting part, 20 ... Inclination part for guidance, 21 ... 1st inclination board, 22 ... 1st 2 inclined plates, 29a ... inflow adjustment member, 29c ... hinge, 30 ... discharge pipe, 30S ... water intake, 30a ... upstream discharge pipe, 30b ... downstream discharge pipe, 30s ... absorption opening, 40 ... sediment particle size sorting 40a ... 2nd comb-tooth-shaped earth and sand particle size selection member, 40c ... 3rd comb-tooth-like earth-and-sand particle size selection member, 41 ... Comb-tooth, 50 ... Water injection confluence member, DESCRIPTION OF SYMBOLS 51 ... Water injection part, 52 ... Absorption part, 53 ... Discharge part, 55 ... Switching switchgear, 60 ... Water injection pipe, 70 ... Water wheel, 70a ... Blade | wing, 72 ... River bed surface, 73 ... Recessed part, 80 ... Step part, 81 ... River structure, 82 ... part, 90 ... water injection device, 100 ... inflow soil collection and discharge device

Claims (21)

In inflow sediment collection and collection equipment for collecting and discharging sediment flowing into reservoirs such as rivers, ponds, lakes, dam lakes,
An upper surface opening for receiving inflow sediment disposed at substantially the same height as the river bed surface;
A collection container for collecting earth and sand flowing from the upper surface opening,
A discharge pipe having an absorption port for absorbing and discharging with water to absorb the earth and sand in the collection container;
A water injection and merging member provided in the discharge pipe and capable of pouring water into the discharge pipe;
The water injection / merging member includes a water injection unit that can connect a water injection device that injects water into the discharge pipe, an absorption unit that absorbs soil and water flowing into the collection container, and the absorbed soil and water. A discharge part that drains in the downstream direction of the discharge pipe, and a structure branched in three directions, a state in which water from the water injection part can be discharged to the discharge part, and water from the absorption part to the discharge part An inflow soil collecting and discharging apparatus comprising an opening / closing device capable of switching between a state in which the water can be discharged and a state in which water from the water injection unit can be discharged to the absorption unit.   The inflow soil collection and discharge device according to claim 1, wherein the collection container includes a guiding inclined portion for collecting the collected earth and sand at the water suction port of the discharge pipe for discharging and discharging the collected earth and sand.   The water injection / merging member includes a state in which water from the water injection part can be discharged to the discharge part, a state in which water from the absorption part can be discharged to the discharge part, and water from the water injection part to the absorption part The inflow earth and sand according to claim 1 or 2, further comprising a switching switchgear that can be switched to a state that can be discharged to the water injection unit, the absorption unit, the intersection of the discharge unit, or the vicinity thereof. Collection and collection device. The water injection pipe is connected to the water injection section, the water injection pipe is composed of a flexible water injection hose,
The inflow earth and sand according to any one of claims 1 to 3, wherein when the forced water supply from the water injection device is stopped, the water injection hose has an opening / closing function by being blocked by being pushed by atmospheric pressure. Collection and collection device.   The inflow soil according to any one of claims 1 to 4, wherein the collection container is provided with a sediment particle size sorting member having a mesh for sorting the size of the collected sediment. Collection and collection device.   The inflow sediment collection and discharge device according to claim 5, wherein the sediment particle size selection member provided in the collection container is inclined. The earth and sand particle size sorting member is composed of a comb-like earth and sand particle size sorting member formed in a comb-teeth shape opened on the downstream side,
The inflow earth and sand collecting and discharging apparatus according to any one of claims 5 and 6, wherein the comb teeth are arranged side by side in the flow direction.   The downstream end of the comb-shaped earth and sand particle size selecting member is provided so as to extend downstream from the outer peripheral position or the outer peripheral position of the upper surface opening provided in the collection container. The inflow earth and sand collecting and discharging apparatus according to Item 7.   The inflow sediment collection according to claim 7 or 8, wherein a comb tooth interval of the comb-shaped sediment particle size selection member is an interval of 5/10 to 1/10 of the diameter of the discharge pipe. Drainage device. A second comb-shaped earth and sand particle size selecting member having a comb tooth interval finer than the comb tooth interval of the comb-shaped earth and sand particle size selecting member;
The inflow according to any one of claims 7 to 9, wherein the second comb-shaped sediment particle size sorting member is installed so as to overlap an arbitrary area of the first soil particle size sorting member. Earth and sand collection device. A third comb-like earth and sand particle size selecting member having a comb tooth interval coarser than the comb tooth interval of the comb-like earth and sand particle size selecting member;
The third comb-shaped sediment particle size selecting member is installed on the first or second comb-shaped particle size selecting member or the second comb-shaped soil particle size selecting member with an upstream end as a fulcrum. The inflow earth and sand collecting and discharging apparatus according to any one of claims 7 to 10, wherein:   The said sediment particle size selection member is provided with the inflow amount adjustment member which adjusts the amount of the earth and sand which flows in into the said collection container, The any one of Claim 5 to 11 characterized by the above-mentioned. Inflow sediment collection equipment. The collection container includes an upper frame having the upper surface opening formed detachably,
The upper frame has a function as a bulky member capable of adjusting the position of the uppermost upper frame by placing another upper frame between the upper frame and the upper end of the collection container. The inflow earth and sand collecting and discharging apparatus according to any one of claims 1 to 12, wherein Comprising a water wheel arranged upstream of the collection container;
The inflow soil and sand collecting and discharging apparatus according to any one of claims 1 to 13, wherein the water wheel feeds the earth and sand flowing in with the blades of the water wheel toward the collection container while rotating by the flow of water. The water wheel can excavate the river bed and form a recess in the river bed,
15. The inflow sediment collection apparatus according to claim 14, wherein the excavated sediment and the sediment flowing into the concave portion are sent toward the collection container.   The inflow soil collecting and discharging apparatus according to claim 14 or 15, wherein the water wheel is movable up and down. The water injection and merging member includes a branch portion formed between the water injection portion and the water absorption portion,
The inflow earth and sand collecting and discharging apparatus according to any one of claims 1 to 16, further comprising a switching valve that switches a flow of water from the water injection apparatus to a downstream side or an upstream side. The water injection and merging member is provided with an automatic return on-off valve at the boundary between the branch portion and the water absorption portion,
The automatic return type on-off valve is urged so as to close the opening at the boundary between the branching portion and the water absorbing portion in a state where no force is applied. Inflow sediment collection and discharge device.   The method for installing the inflow sediment collection apparatus according to any one of claims 1 to 18, wherein the collection container is installed on the upstream side before the water flowing through the river flows into the reservoir. How to install the inflow soil collection and discharge device.   It is formed by excavating the downstream riverbed of the collection container, or by forming the collection container in a water passage part of the river structure to form a step part of the river structure as a sediment reservoir. The installation method of the inflow sediment collection apparatus according to claim 19. 21. The method for installing an inflow soil collection apparatus according to claim 19 or 20, wherein a river structure such as a floor stop is installed in the downstream portion of the collection container.

Images