62results about "Stream regulation" patented technology

The invention provides a control node locating protecting method of undercutting channel segment water level lowering amplitude. The method comprises the steps that a lateral erosion zone and a deep erosion zone are divided; a target channel section is subjected to meshing, a plane two-dimension water flow mathematic model is established, parameter calibration and verification are carried out; a protection project is generalized to the plane two-dimension water flow mathematic model, the arranging zone and the width of the protecting project are determined; local gradient amplification and upstream water level amplification corresponding to each working condition are obtained, mesh sequences are analyzed respectively; key nodes or other nodes which have obvious influence are selected, for lateral erosion nodes, a hidden closure dam and a beach protection part are arranged on a river branch or a bottomland, and for deep erosion nodes, a bottom protecting band or a hidden closure dam are placed in a main groove. According to the method, nodes are divided into the lateral erosion nodes and the deep erosion nodes, protection part difference of the nodes in different types is provided, by comparing the efficiency of a local channel segment arranging protecting project, the positions of the nodes are accurately located, and the optimum efficiency of the protecting project is guaranteed powerfully.

The utility model relates to the technical field of ocean engineering, in particular to a double-layer perforated plate flow guide breakwater which comprises a connecting pile and a double-layer perforated flow guide plate. Each connecting pile comprises a pile cap, a pile body and a cattle foot; the two groups of double-layer perforated guide plates are arranged in parallel front and back, each group comprises a plurality of perforated guide plates, each perforated guide plate is provided with a plurality of holes, the perforated guide plates in each group are connected into a whole side by side through the connecting piles, and the connecting piles are positioned on two sides of the perforated guide plates. According to the structure, through the optimized design, the wave dissipation effect and the structural stability of the breakwater are improved, and meanwhile the construction difficulty and cost are reduced. The structure is particularly suitable for ports, wharfs and coastal protection in the marine environment.

The application discloses a small and medium scale meandering river multi-stage biological habitat system, and the river has a convex bank and a concave bank which are oppositely arranged, and further comprises: a water-permeable flow guide unit which is arranged on the convex bank of the river and extends into the river, and is used for guiding the water flow direction and reducing the water flow speed; a deep pool habitat unit which is formed downstream of the concave bank opposite to the water-permeable flow guide unit; and a shoal habitat unit which is formed downstream of the convex bank on the leeward side of the water-permeable flow guide unit; wherein the deep pool habitat unit is arranged with a second habitat substrate group, and the surface of the shoal habitat unit is arranged with a first habitat substrate group. The application further discloses a construction method of the small and medium scale meandering river multi-stage biological habitat system, the water flow is guided and utilized by the water-permeable flow guide unit, the deep pool habitat unit and the shoal habitat unit are shaped, the interference to the natural environment is small, and the multi-stage biological habitat system is constructed through the arrangement of the second habitat substrate group and the first habitat substrate group.

This invention relates to the technology of silt prevention and removal, and more specifically to a smart silt removal method and control system in response to changes in water depth. When removing silt from a shipping channel, the invention first segments the channel, then classifies the channel segments according to the water depth of each segment, and applies a smart silt removal method to the channel according to the floating type of channel. In particular, for the first type of channel, due to the characteristic that silt easily settles in the segment, a support vector machine is used to combine the channel's position and past silt accumulation amounts to achieve accurate and effective smart prediction of the silt removal depth. For the second type of channel, due to the characteristic that silt accumulation is less likely to occur, a fixed pattern is adopted to determine the channel silt removal plan, and through the plan of this invention, the targetability and efficiency of establishing the silt removal method can be improved.

The utility model provides a prevent fishway structure of flood siltation, relate to hydraulic engineering technical field, prevent fishway structure of flood siltation including fishway groove body and apron, the fishway groove body includes fishway bottom plate and sets up the fishway side wall of fishway bottom plate both sides, the import end of fishway groove body is provided with fishway gate, the apron sets up in two fishway side wall's upper end surface, the apron is configured as open or close fishway groove body. The utility model discloses a prevent fishway structure of flood siltation, compared with prior art, solved the problem that fishway silted up during flood, also avoided the structural safety risk brought by the fishway side wall of adding height.

The application discloses a small and micro river ecological landscape restoration system, comprising: a drop weir including a front end suspended in the downstream of a river channel; a stone cage wall for supporting the drop weir; a riprap group for constructing a deep pool-shoal sequence, including riprap blocks for forming a nutrient temporary storage area, and refuge gaps provided between adjacent riprap blocks for small fish and shrimps; and a vegetation tower. The application also discloses a small and micro river ecological landscape restoration method. The small and micro river ecological landscape restoration system and the restoration method make the water body in the river channel fall through the front end to form a water curtain in contact with air, increase the oxygen content in the river channel, inhibit the generation and reproduction of anaerobic bacteria, prevent the water body from being black and smelly, ensure the cleanliness of the water body, and increase the ornamental property. The riprap group facilitates the reproduction and refuge of small fish and shrimps, and the vegetation tower is further beneficial to the long-term stable and sustainable development of the water body ecological landscape system.

The application discloses the technical field of soil and water loss protection devices and relates to a soil and water conservation device for reducing river sediment accumulation, which comprises a mounting seat and symmetrically arranged sand taking pool groups, the sand taking pool groups comprise sand storage pools and sand setting pools arranged in sequence, and conveying belts are arranged between the sand storage pools and the sand setting pools; an upwardly protruding and downwardly inclined drainage table towards the two side sand setting pools is fixedly arranged at the top of the mounting seat, a drainage groove downwards inclined towards the two side sand setting pools is arranged in the middle of the drainage table, the drainage groove is communicated with the sand setting pools, and the drainage table and the drainage groove are arranged in sequence according to the flowing direction of the river.

This invention relates to the field of emergency hazard mitigation technology in water conservancy projects, and in particular to a method for controlled release and hazard mitigation of landslide-dammed lakes based on erosion benchmark protection. The method includes: calculating the allowable breach height of the landslide-dammed lake based on the dam length, dam volume, and reservoir capacity corresponding to the protection elevation; determining the erosion benchmark protection elevation based on the allowable breach height; calculating the cross-sectional dimensions of the spillway based on the determined maximum breach flood peak flow; and laying a temporary spillway based on the erosion benchmark protection elevation and the cross-sectional dimensions of the spillway. This invention achieves safe and controllable release of water from landslide-dammed lakes, improves the safety and efficiency of emergency hazard mitigation, effectively avoids downstream flood disaster risks, and is applicable to various landslide-dammed lake emergency response scenarios.

The application discloses an underwater dredging operation method using secondary turbidity, and the method comprises the following steps: obtaining standard terrain data and standard hydrological data; determining a time interval of the dredging operation based on the standard hydrological data, determining a silt height and a silt distribution of an underwater operation area based on the standard terrain data, determining an operation sequence, and generating an operation scheme; in response to starting the dredging operation, a crushing device crushes the silt in the operation area to obtain a primary turbidity water body; and a push-flow suspension device is started to mix the primary turbidity water body with shallow water to form a secondary turbidity water body. The application determines a reasonable operation sequence based on the silt height, preferentially processes positions far from the central axis and with less silt accumulation, and avoids the silt in the secondary turbidity water body from re-depositing on the other side due to the rotation of the earth, thereby increasing the dredging effect.

This utility model discloses a dredging and filtration device for river water conservancy construction, relating to the field of river dredging technology. It includes a mixing component, a feeding rack on one side of the mixing component, and a screening component inside the feeding rack to block stones stirred up by the mixing component. The screening component is drivenly connected to the mixing component. A sweeping component for cleaning the screening component is installed on the screening component, and the sweeping component is drivenly connected to the mixing component. The feeding rack is connected to a suction pipe, and a suction pump is installed above the suction pipe. This utility model is mainly used for river dredging operations. The mixing component agitates the silt at the bottom of the river, mixing the silt with water to form a mud-water mixture, facilitating subsequent suction operations. Simultaneously, the screening component intercepts larger particles such as stones stirred up during the mixing process, preventing them from entering the suction system and causing blockages.

This utility model discloses a cofferdam structure and construction system for deep mountain canyon areas. The cofferdam structure includes a cofferdam body located between a diversion tunnel and a tailrace tunnel. The cofferdam body is curved and serves to separate the diversion tunnel and the tailrace tunnel. The cofferdam construction system includes the aforementioned cofferdam structure for deep mountain canyon areas. Considering the complex and varied terrain of the construction environment and the layout of the structures, the curved cofferdam body overcomes the constraints and limitations caused by a single directional axis, improving the adaptability and flexibility of the design and enabling it to better adapt to complex environments. Furthermore, the curved cofferdam body also enhances the smoothness and stability of the cofferdam structure, contributing to improved performance and safety in use.

This utility model relates to the field of lake dredging technology, and more particularly to a system for collecting and removing polluted bottom sediment based on terrain modification. The system includes a sediment collection trough constructed on the lakebed; a sediment well located in a low-lying area of ​​the sediment collection trough; a sludge scraper for collecting surrounding sediment into the low-lying area of ​​the sediment collection trough and the sediment well; a liftable outer sleeve that, when lowered vertically, completely covers the sediment well, with its lower end submerged in the sediment in the low-lying area and its upper end protruding above the water surface; a water pump for removing water from inside the outer sleeve; and a sediment removal device for removing the sediment collected in the outer sleeve and the sediment well. This solution has the advantages of improving sediment collection efficiency, reducing water content, and minimizing water disturbance.

This invention discloses a multifunctional energy dissipation and scour prevention device for the downstream of a sluice gate and its operation method. It includes a flow guiding unit comprising a rotating flow guiding pier wall, two automatically retractable flow guiding pier arrays on one side of the rotating flow guiding pier wall, a wing wall flow guiding pier jet array on one side of the rotating flow guiding pier wall, and a central retractable flow guiding pier array on one side of the two automatically retractable flow guiding pier arrays; a scour prevention unit comprising a downstream wing wall of the sluice gate, and a downstream stilling basin apron located at the bottom of the downstream wing wall of the sluice gate; and a measurement unit comprising an upstream water level gauge, a downstream water level gauge on one side of the upstream water level gauge, an upstream flow velocity measuring device on one side of the upstream water level gauge, and a downstream flow velocity measuring device on one side of the downstream water level gauge. The beneficial effects of this invention are that it solves the scour problem of the riverbed and bank slopes downstream of the sluice gate, and improves the overall stability of the downstream area of ​​the sluice gate.

The application discloses a coastal channel maintenance decision-making method and system based on a siltation mathematical model. The method comprises the following steps: constructing a channel full-life-cycle database; coupling a tidal current, a wave and a sediment model by using an unstructured grid and an MCT coupler to establish a channel siltation mathematical model; correcting siltation parameters, optimizing the mathematical model and predicting future siltation by using an LSTM time series prediction model, and constructing a siltation risk atlas; generating early warning information according to the atlas, determining dredging engineering quantity and formulating a dredging scheme. The application realizes accurate prediction of channel siltation and quantitative decision-making of a maintenance scheme, and improves the scientificity and economy of channel maintenance.

A system of modular units 502,504,506,508 attachable to create an inclined cascade drainage channel 500 on a slope, each unit (individually shown in Fig 1), having a floor 502a,504a,506a,508a (112) an

This invention discloses a comprehensive management scheme for dredging, widening, straightening, and submerged dam control of the Yangtze River Zhenjiang 105 buoy section, aiming to solve long-standing problems such as turbulent water flow, sharp bends, narrow channels, and easy siltation in this section. The scheme includes: dredging, widening, and straightening the shallow waters and tidal flats south of the 103-1 red buoy and the shallow waters north of the 100 black buoy 600 meters upstream of the old Fuxing Shipyard; adjusting navigation marks; constructing a half-width submerged dam at the upper reaches of the Hechangzhou Island, using a layered structure with sandbags at the bottom and crushed stone mixed with boulders at the top, to achieve long-term flow control and flood discharge during flood season; employing multiple equipment such as sand dredgers and cutter suction dredgers for combined operations; and utilizing the dredged sand for sale and fine sediment for land reclamation. This invention completely solves the navigation bottleneck of the 1O5 buoy by combining physical morphological adjustment with hydrodynamic optimization, and has significant advantages such as being eco-friendly, structurally stable, and low-cost.

The present application relates to the field of water conservancy and ecological restoration technology, and particularly relates to a small river blocking construction fish migration device, which comprises a culvert, a dredging pipeline one and a plurality of dredging pipelines two, the culvert is provided with a fish passing area, a plurality of bottom sills are arranged in the fish passing area, slopes and slow flow sections are formed between the plurality of bottom sills, a plurality of sand accumulation grooves are arranged on the inner wall of the slow flow sections, the top end of the sand accumulation groove is covered with a baffle, the dredging pipeline one and the dredging pipeline two are connected with the sand accumulation groove, and the dredging pipeline one and the dredging pipeline two are both arranged obliquely. Through the arrangement of the sand accumulation groove, the block valve, the dredging pipeline one and the dredging pipeline two, the fish is blocked by the baffle, the amount of silt accumulation in the fish passing area is reduced, and the influence on the fish is reduced; through the cooperation of the dredging pipeline one and the dredging pipeline two, the silt in the sand accumulation groove is regularly cleaned by the action of the water flow, the culvert does not need to be closed, the fishway operation is not interrupted, the influence of the fish migration period is small, and the working efficiency is high.

This invention discloses an underwater anti-fouling and noise reduction device, comprising a functional main body and a fixation component. The functional main body includes a curtain, a sediment treatment component, and a bubble generating device. The curtain includes a vertical baffle layer and perforated layers and noise reduction layers located on both sides thereof, with the perforated layers and baffle layers enclosing a first chamber. The sediment treatment component includes a feeding mechanism, a settling aid mechanism, and a silt removal mechanism. The feeding mechanism feeds flocculant into the first chamber, the settling aid mechanism has a first movable component with a pressure-balancing channel to apply downward thrust to sediment clumps, and the silt removal mechanism is located at the bottom of the first chamber to discharge sediment clumps. The bubble generating device is located at the top of the curtain to form a bubble curtain. The fixation component includes a propulsion mechanism for balancing the attitude of the functional main body and a counterweight and anchor located at the bottom of the functional main body. The device has a simple and reasonable structure, can achieve stable and precise structural coordination in an underwater environment, and has good anti-fouling and noise reduction effects.

The application discloses a deep-water rapid-flow strong-tide cofferdam outer ring anti-scour device, which comprises a buffer assembly, a mud surface protection mechanism and an energy dissipation mechanism, the mud surface protection mechanism comprises a guide fin, a segmentation cage, a connecting rib plate, a cavitation tube, a guide rod, a translation screw rod and a gas outlet end, the guide fin is in threaded connection with the translation screw rod, and the outer contour of the segmentation cage is in close fit with the inner contour of the guide fin. The mud surface protection mechanism is arranged, so that the device can avoid the problems that the mud surface is washed away by water flow or the mud surface is washed downward due to insufficient protection of the mud surface, and further the bearing capacity of the cofferdam is caused, the cofferdam is inclined and collapsed, and quality and safety accidents are caused.

To prevent or mitigate floods urgently, in a short period of time and at low cost. [Solution] The water flow acceleration system (1) is a water flow acceleration system suitable for drainage applications in cities or rivers, and is characterized by comprising two or more propulsion units (100), each of which accelerates the water flow by mechanical thrust.

The application discloses a cofferdam structure suitable for gentle slope water-taking river channel construction, which is used for being installed on any side of a river bank and comprises a water intake pipe, an upstream cofferdam, a downstream cofferdam and a longitudinal cofferdam. One end of the water intake pipe is connected with a water intake arranged close to the river bank, and the other end is located on one side of the river bank. The upstream cofferdam is arranged on the upstream side of the water intake. The downstream cofferdam is arranged on the downstream side of the water intake. The longitudinal cofferdam is connected between the upstream cofferdam and the downstream cofferdam. The river bank, the upstream cofferdam, the downstream cofferdam and the longitudinal cofferdam jointly form a sedimentation water area, which is used for carrying out secondary sedimentation and purification on the low-speed water flow filtered through the downstream cofferdam. The cofferdam structure has the advantages of good purification effect and strong practicability, can realize effective purification of the construction turbid water through the interception, filtration, diversion, speed reduction and sedimentation of the cofferdam, and can minimize the influence of the construction on the water taking of the river channel.

The application discloses a biological dredging device and an open water composite dredging method, and belongs to the technical field of open water environment treatment. The biological dredging device comprises an aluminum alloy cuboid main frame, a fixed microorganism container coated with a fine steel wire mesh is arranged in the frame, and a fixed microorganism material with a carrier such as a volcanic rock and a membrane-hung aerobic bacteria is arranged in the frame; a float is hung on both sides of the frame, an aeration fan is arranged in the frame and is connected with an aeration pipe with a micro-nano aeration head, a push flow driving module and a solar power supply module can be additionally arranged; according to the composite dredging method, after the initial measurement of a silt layer, biological dredging is performed to a preset switching depth by using the biological dredging device, then a mechanical dredging device is selected according to water body parameters to dig to a design depth, and the design depth is confirmed by subtracting the biological dredging amount from the total dredging amount. The application is suitable for the dredging of open water bodies such as rivers, lakes, aquaculture tail water areas and the like, and the dredging efficiency is significantly improved and the cost is reduced through the complementary advantages of biological dredging and mechanical dredging in time and space.

The construction method for improving the self-standing and stability of an open type shallow buried steel structure dam body island cofferdam belongs to the technical field of water conservancy and municipal engineering. In view of the defects of self-standing and stability caused by the fact that the open type steel structure dam body island cofferdam cannot be closed in a ring and the shallow buried anchoring is insufficient, the application constructs a water level natural balance initial state through reserving upstream and downstream ports, and solves the problems of insufficient shallow buried anchoring and uneven initial stress by synchronous filling. Combined with the change law of river tides, layered and collaborative filling is implemented, the sand and gravel layer is naturally compacted by using the advance and retreat of tides, and the dependence on additional ramming equipment is reduced. By reasonably controlling the filling height difference inside and outside the dam body, a compression and tension composite stress system is constructed, a self-balancing system of compression and tension composite stress is formed, and the defects of the open structure closed loop are effectively made up. The method effectively improves the self-standing and stability of the dam body, takes into account the economy and efficiency, adapts to complex geological and hydrological conditions, and is suitable for large-span and long linear construction sites.

The utility model discloses a kind of slope protection based on river channel dredging silt, comprising: silt slope, at least one filler assembly and hole type bottom silt planting brick layer, silt slope has at least two diversion arc slopes, at least two diversion arc slopes are mutually parallel and interval arrangement along the extension direction of silt slope, and diversion groove is formed between adjacent two diversion arc slopes, filler assembly is set in diversion groove, hole type bottom silt planting brick layer extends along the surface of silt slope, and is laid on the surface of silt slope and filler assembly.The utility model can effectively solve the problem that silt of river channel dredging is directly transported not only waste manpower and material resources, and silt splashed in transfer process on the bank is easy to cause environmental pollution.

The present application relates to the technical field of bitumen-containing sand dredging equipment, and particularly relates to a low-disturbance reverse-paving isolation layer rake head for bitumen-containing sand dredging, the end of a feeding pipe is in communication with the outer shell, a moving plate is in sliding sealing connection in the outer shell, the end of a plurality of spigots is in rectangular array connection on the moving plate and is arranged towards the feeding pipe, the other end of the spigot is in sliding sealing in a guide pipe, a plurality of waist-type holes are formed through the side wall of the spigot end, one end of the waist-type hole is arranged in a conical pipe, the end of the guide pipe is in communication with the end of the conical pipe, the other end of the conical pipe is in communication with the outer shell, a buffer mechanism is arranged between the outer shell and the moving plate, the moving plate preliminarily buffers the impact of clean sand, the conical pipe disperses the discharging direction when reverse paving is implemented, and the impact force of the clean sand output by the spigot through the waist-type hole is dispersed, so that the phenomenon that oil phase and fine particles re-enter the water body to cause pollution occurs when reverse paving is implemented can be avoided.

The application provides a self-adaptive rectifying skewback device applied to a curved urban river channel and a working method thereof. The device comprises a rectifying skewback device of a rectifying and energy-dissipating area arranged at a bend of the curved river channel; further comprises a height adjusting mechanism for automatically adjusting the water level height of the rectifying skewback device in water according to different water level heights in the curved river channel; the height adjusting mechanism comprises a water level information acquisition module for acquiring water level and water depth information near the rectifying skewback device; a height lifting mechanism arranged between the rectifying skewback device and the riverbed bottom; and a control module with a signal input end connected with the water level information acquisition module and a signal output end connected with the height lifting mechanism. The device adjusts the water flow structure of the bend, avoids the scouring of the concave bank and the silting of the convex bank, purifies water quality by using aquatic vegetation, increases the landscape effect of the river channel, and has the functions of self-adaptive intelligent adjustment of river flow uniformity and water environment restoration.

The present application relates to the technical field of scouring, and particularly relates to a device for reducing scouring, comprising a fairing, two parallel flow channels are arranged in the fairing, a fairing end is arranged between the inlets of the two flow channels, the fairing end is located at the upstream side of the flow channel inlets, the flow channel comprises a first bend and two second bends, the first included angle alpha between the inlet and the outlet of the first bend is 0°<alpha≤90°, the second included angle beta between the inlet and the outlet of the second bend is 90°<beta<180°, the first bend and the second bend of the same flow channel are arranged alternately, and the second bend closest to the outlet of the flow channel, the fairing is located at the upstream of the protected object, and the outlet of the flow channel and the protected object are spaced apart. The device can not only weaken the scouring of the protected object and the riverbed in front of the protected object, but also prevent the riverbed in front of the anti-scouring structure from being scoured due to the water blocking effect.