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JP2000073344A |
To eliminate a site for forcible drainage, and reduce a cost of equipment without increasing a total weight of a gate which moves up and down by constituting a forcible drainage channel by using a hollow gatepost arranged on a side surfa...
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JP2000073342A |
To prevent contraflow through a drain pipe integrally fitted to a gate by closing a switching valve of the drain pipe in the case of a foreign matter being bitten in flap gates fitted to the lower reaches end of the drain pipe by providi...
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JP2000073343A |
To eliminate a site for forcible drainage, and reduce a cost of equipment without increasing a total weight of a gate which moves up and down by constituting a forcible drainage channel by using a hollow gatepost arranged on a side surfa...
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JP2000064261A |
To form a cut-off bulkhead in a wide range and to prevent a water channel from being generated by extending a cut-off wall from a special sluice pipe interposed into a sluice pipe passing through a bank and connecting the cut-off wall in...
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JP2000064260A |
To form cut-off bulkheads in a wide range and to prevent a water channel from being generated by extending a cut-off wall from a special sluice pipe provided on a sluice pipe passing through a bank and propelling and integrating the cut-...
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JP2000045255A |
To cope with a tidal wave by closing a flap gate to prevent the backflow when an outer channel has a prescribed level or more, or the pressure from the outer channel side is prescribed pressure or more. The hydraulic cylinder 5a of a clo...
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JP2000001841A |
To dissipate energy of falling and flowing liquid straightening the stream while adjusting a falling amount of the liquid in a cylindrical channel of a high head (for example, the head is 1,000 m), make the liquid fall down from inside t...
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JPH11350462A |
To stably scour sediment with an inexpensive and simple structure by guiding the sediment from the upstream into a scouring pipe via multiple opening sections provided at least in the prescribed upstream side position of a water storage ...
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JP2981570B2 |
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JPH11315528A |
To partly or entirely use consolidation works in common for measures for anadromous and catadromous natures of fish and shellfish in different elevations, head works, dams, etc., constructed in a fast-flowing part of a river by forming a...
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JP2963896B1 |
[wrap up] [Task] An object of the present invention is to provide a sluice mechanism provided with a valve control device having a simple structure and capable of completely automating the control of drainage. A water collecting pipe tha...
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JP2958544B2 |
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JP2951263B2 |
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JPH11247158A |
To provide a small volume of concrete, lightweight, quickly execute floor hardening method of a river and secure fish route by connecting a downstream side weir provided with a notch in which flow water overflows on an upper edge and an ...
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JPH11241328A |
To allow living creatures such as aquatic insects to be anadromous by providing a plurality of projections for water control which are projecting on a surface of a block body in a zigzag manner, and a plurality of recessed parts formed a...
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JPH11229354A |
To provide ornamental concrete pieces which can not only reduce the cost and amount of disposition by enhancing the recycling rate of waste concrete but also enables an ornamental materiel to be easily obtained at low cost, the ornamenta...
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JPH11209955A |
To automatically remove sand deposited in the vicinity of a river- mouth by storing water in a gate arranged so as to be openable/closable, and discharging the water in the gate when a water level outside of the gate lowers more than the...
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JPH11182703A |
To prevent outflow of oil and leakage of a lubricant by keeping pressure in internal space constant eve if the volume of the internal space changes in association with opening/closing of a passage due to the protruding/ receding movement...
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JPH11158849A |
To provide a weir, through which fish can go upstream without providing a specified path for fish, by locating a square movable weir main body having a shaft part turnably connected to a riverbed and a rotary driving device so that it ca...
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JPH11158853A |
To stabilize quality of construction independently of a degree of skill of a worker, and to shorten the construction period by providing multiple projections for decelerating a water flow flowing in a top surface thereof, and laying bloc...
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JPH11158852A |
To provide a gate which can be miniaturized and made lightweight while having sufficient pressure resistance, and which can reduce working time and the cost of construction. A draft gate 1 has connecting pipes 13 (inflow side connecting ...
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JPH11140853A |
To provide a fishway capable of being laid as a covered conduit which generates no change in natural circumference by providing partition dams helping fish go upstream, inside a body formed of a plurality of cylinders connected. Partitio...
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JPH11117272A |
To provide a fishpass structure easy to find fish and Crustacea, easy to swim up and move and easy to construct even on an existing head drop structure and a weir structure without a fishpass. A fishpass structure 10 is constructed by de...
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JPH11107256A |
To prevent a cut-off wall from treading a sluice way into it when the sluice way settles down together with an embankment by installing the cut-off wall extensively in the radial direction of the pipe, disposed to form a collar at the pe...
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JPH11107240A |
To not only lay a gutter pipe in a non-opencut manner but also install even the impervious wall easily in the non-opencut manner. The impervious wall 10 is buried into soil from a section between the mutual end sections of a pair of pipe...
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JPH1181287A |
To improve the pumping efficiency of an air lift device provided with a lifting pipe having a horizontal angular cross section by forming the corner section of the lifting pipe into an obtuse angle, and decreasing the down flow through t...
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JPH1161786A |
To provide a fish way through hole so that fish can freely communicate between up/down side of a river intercepted by a dam, by decompressing the fish way through hole arranged over the high dam by a vacuum pump to fill the through hole ...
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JPH1136271A |
To dispense with a small-diameter bypass pipe and an auxiliary jet flow gate required in the past, obtain the operating state opened with an intake port with a fine opening, simplify execution, suppress the cost increase of a facility, a...
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JPH1136269A |
To provide a flexible membrane weir securing a required quantity of water even at the time of a drought and allowing fish to go upstream. This flexible membrane weir 1 is erected or prostrated when a fluid is fed or discharged. The surfa...
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JPH1113043A |
To improve a natural view by planting aquatic plants in a fish way block provided in a stepped part of rivers. A fish way block 10 is provided with an inflow port 16 located in the upstream and an outflow port 18 located in the downstrea...
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JP2588756Y2 |
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JP2588684Y2 |
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JP2818908B2 |
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JP2818969B2 |
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JP2818907B2 |
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JPH10280366A |
To provide a simplified dust-proof facility of discharge system without any manual labor. The discharge system is provided with a main water passage gate provided in the downstream part of a main water passage, a bypass water passage 4 b...
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JPH10280363A |
To provide a water purifying function by providing so-called EM including a useful microorganism group. A block F for water-working is fish pass blocks laid on the bottom of a river and dents 1 are formed in an upper surface such that fi...
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JPH10252045A |
To flash sand without lowering the water level of a dam lake and without setting a water discharge pipe to the opened channel state by erecting an inner tube connected to a splash pipe and an outer tube having an intake/ exhaust port at ...
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JPH10249380A |
To provide a water introducing, maintaining and discharging equipment with the energy effectively utilized and the operation and maintenance costs reduced and provided with an underwater aerator by operating the underwater aerator withou...
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JPH10252042A |
To provide a sand discharging mechanism and method which make it easier to collect accumulated sand from an existing dam, are rational and efficient, and are desirable for keeping the environment on the downstream side, maintaining the r...
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JP2797700B2 |
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JPH10245831A |
To safely guide river fishes to a fish pass without a fall of river fishes on a river bed togetherwith rover water flowing over a flexible membrane and to protect the ecosystem of a river and river fishes by a method wherein gas is disch...
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JP2791865B2 |
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JP2577713Y2 |
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JP2577712Y2 |
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JP2577711Y2 |
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JP2577714Y2 |
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JPH10195851A |
To discharge deposit of mud of muddy water which obstructs opening and closing of a gate or the like of a water-use structure such as a weir or the like in a wide range and surely. Between legs for opening and closing a gate of a weir, a...
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JP2775362B2 |
PURPOSE: To perform the cleaning work of the upstream/downstream faces of a concrete dam automatically, not manually. CONSTITUTION: A crest machine 11 mounted with a crane 21 is movably arranged at the crest 3 of a concrete dam 1, and a ...
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JP2770150B2 |
PURPOSE: To effectively fix the valve body of a control valve for tail water stream, by preventing freeze thereof in winter and providing a simple structure. CONSTITUTION: In a tail water stream control valve which can be freely adjusted...
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