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JP7288761B2 |
To provide an optical cable laying structure to an existing pipe that can reduce expenses required for operations such as repairing and maintaining an optical cable laying area in a dam and replacing optical cables and improve safety of ...
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JP3242178U |
[PROBLEMS] To solve the problem that the amount of distortion in the riverbed portion of the cover layer is larger than the amount of distortion in the riverbank portion of the conventional suspended impermeable wall, and as a result, th...
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JP2023517955A |
The present invention is a fish passage system for use in dams. It may incorporate one or more reversible pump-turbines for controlling the downstream flow of water and fish, generating power therefrom, and for pumping water and fish ups...
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JP2023035312A |
To provide an emergency flood spillway device capable of stably discharging water by greatly increasing discharge capacity in the event of a great flood.A flood spillway device (20) for increasing and stably discharging a large amount of...
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JP7198852B2 |
The invention shows embodiments of a hydraulic flow arrangement, to arrange the flow of waters past an obstacle in the flow, such as a dam in the riverbed, upstream the natural flow direction of the water in the riverbed, wherein the arr...
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JP2022176526A |
To control an operation related to discharge of sediment deposited at an upstream side of a dam body crossing a river such as an erosion control dam and an erosion control weir and water intake without using electric power.A device for b...
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JP2022135461A |
To prevent an in-joint cut-off structure which can prevent water from leaking below a water supply structure from a joint even when a joint material installed in the joint of the water supply structure is partially damaged to leak.An in-...
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JP7130691B2 |
To provide a boom in which passage of creatures is possible even when a water level is lowered.A boom 1 comprises: ropes 10, 20 bridged in a prescribed water area; a plurality of floats 30 connected with the ropes 10, 20; and nets 40, 50...
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JP7089137B2 |
To provide a method and a system for returning a dam deposit downstream, which does not adversely affect downstream rivers even if silt clay contained in the dam reservoir deposit is supplied downstream of the dam.This method for returni...
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JP6968707B2 |
To provide a sediment discharge gate that is superior in a sealing function and in which a poor opening/closing operation of a door body and a decrease in the sealing function that are caused by sediments being caught are unlikely to occ...
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JP2021116634A |
To provide a fish passage unit capable of being applied to a fall portion in a river and a water passage and easily maintained and managed at low cost.A portable fish passage unit includes: floor plates FL disposed in a runup path of fis...
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JP6896206B2 |
To provide a sludge lifting device which facilitates handling for collecting and removing an underwater precipitate and can suck sludge with a long distance and practical concentration.A sludge lifting device has a sand absorption port o...
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JP6871599B2 |
To provide a fishway and a forming method thereof that allow the fishway to be constructed readily at a low cost and facilitate running up of fishes.A fishway 3 of the present invention includes: a first surface 1 formed in a water chann...
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JP6853344B2 |
The invention shows embodiments of a hydraulic flow arrangement, to arrange the flow of waters past an obstacle in the flow, such as a dam in the riverbed, upstream the natural flow direction of the water in the riverbed, wherein the arr...
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JP2020193460A |
To provide an inexpensive and lightweight fish way unit which is able to be hand-made by a farmer.A portable fish way unit is configured to comprise: a body BDY having side plates 2 and a bottom plate 1 with a section in a rectangular fr...
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JP6741846B2 |
To provide a connection structure which can prevent push-up of a precast member even when a water pressure in a downward flow direction acts on a joint part of the precast member.A joint part end face 2 which is installed so as to be pos...
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JP6731177B2 |
To enable maintenance of outflow rate even when dusts accumulated on water inlet, and facilitate removal of the accumulated dust.A water discharge facility of the present invention is installed on a dam body, and includes a water storage...
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JP6733355B2 |
To provide a water discharge facility that can maintain a discharge quantity of water by suppressing attachment of dust to a water intake.A water discharge facility comprises a cylindrical intake body 2 that is arranged in a water storag...
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JP6674743B2 |
To provide a seal pit for drainage with an inexpensive and sufficient defoaming effect.A seal pit for drainage 100 comprises: a drain pipe 1 which has a drain outlet 11 to discharge drain water; and a weir 2 which is a partition between ...
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JP6573188B1 |
To provide a river structure in which stone materials stacked in a water tap are hard to collapse and a fishway does not need to be provided on the side of a dam. There is an inclined portion between a dam and a water tapping downstream ...
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JP6556506B2 |
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JP3222408U |
To provide a fixing structure capable of avoiding and fixing reinforcing bars in a base concrete without moving the installation position of the wear resistant panel when the wear resistant panel is fixed to the base concrete with anchor...
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JP6503412B2 |
To provide a river structure which does not need to provide a fish pass on a lateral side of a dam and in which an apron is hard to be destroyed.In a river structure, an inclined part is provided on the downstream side of a dam, an apron...
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JP2019002270A |
A pipe system (2) for dredging includes a pipe unit (3), and a plurality of deposition capturing units (4). The pipe unit (3) has a pipe structure (31), and the pipe structure (31) has an inner peripheral surface (311) surrounding a long...
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JP6429198B2 |
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JP6394001B2 |
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JP2018131894A |
To provide a dredging system having a longer usage life.A dredging system is provided on a water utilization facility including a main dam provided adjacent to a main water storage area and a first sub-dam provided adjacent to a first wa...
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JP6366780B2 |
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JP6345057B2 |
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JP6318685B2 |
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JP6277156B2 |
An opening/closing device according to the present invention includes a gate, a fall prevention unit, a support release unit, a first float, a floating prevention unit, a second float, and a floating prevention release unit. The gate rec...
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JP6272602B2 |
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JP6245703B2 |
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JP6240822B2 |
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JP2017201073A |
To provide a sediments removal method using a caisson for a storage dam free from undesired influences on stored water, applicable to any type of storage dam for removing large sediments such as drifted woods and/or mass of rocks.The sed...
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JP6182336B2 |
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JP6153817B2 |
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JP6147010B2 |
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JP6138029B2 |
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JP6090714B2 |
To provide a power generating system capable of keeping energy of flowing water transmitted to power generating means.This power generating system 1 comprises: floating bodies 10a, 10b substantially spaced apart and arranged side-by-side...
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JP2017031683A |
To provide a connection structure capable of preventing a precast member from being pushed up, even when flow-down water pressure acts on a joint part of the precast member.A joint part end surface 2, which is installed to be positioned ...
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JP6067249B2 |
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JP6063778B2 |
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JP6063779B2 |
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JP2016211337A |
To provide a highly workable fishway installed on a riverbed that allows a fish and other aquatic lives to ascend even when a water amount is small.A fishway installed on a riverbed includes: raising parts 3, 4 fixed on a riverbed 6a on ...
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JP5956789B2 |
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JP5956032B1 |
[Subject] Art which further improves the restoration nature of concrete to a bottom lower part of a Corridor cell is provided. [Means for Solution] An installation process of a mount of installing a mount with which a Corridor cell of th...
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JP5901040B1 |
To provide a riverbed structure in which a habitat of aquatic organisms is surely protected, friendly to the natural environment, and relatively easy to construct. As a riverbed structure, a plurality of unit bodies 1 are arranged side b...
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JP5893643B2 |
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JP5867918B2 |
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