42 results about "Sediment transportation" patented technology

The invention discloses a high/low concentration-adaptive sediment movement numerical simulation method. The method comprises the following steps of: (1) establishing a high/low concentration-adaptivesediment movement mathematic model; (2) calculating a boundary condition, a suspended sediment settlement speed, a bed surface shearing stress, a stability function and correction adapted to a high/low concentration sediment condition; (3) solving the high/low concentration-adaptive sediment movement mathematic model; (4) carrying out water flow verification on the sediment movement mathematic model by adoption of practically measured data, verifying a sediment concentration and verifying channel deposit distribution; and (5) analyzing influences, on river-mouth channel sediment deposit, of each factor according to a sediment movement mathematic model result. According to the method, a three-dimensional sediment transportation simulation technology is provided, a sediment movement numerical simulation technology which considers a water-sediment interaction mechanism and a sediment suspension mechanism under high/low concentration sediment conditions is provided, so that numerical simulation research is carried out on engineering problems such as river-mouth channel sediment deposit and the like, action process and mechanism of sediment transportation are analyzed, and scientific and technological support is provided for engineering practice.

The invention discloses an underwater self-suction injection stream flow characteristic integrated test device system which comprises a self-suction nozzle device and a submerging device which are made of organic glass. The self-suction nozzle device is at the upper part of the integrated test device system and is formed by a self-suction nozzle and a gas turbine flow meter. The submerging device is at the lower part of the integrated test device system and is formed by a bearing water tank, a safety valve, a pressure meter, a target plate and a bracket, a pressure measuring cover plate, a water discharge valve and a gas exhaust valve. According to the integrated test device system, the gas and liquid phase flow characteristics in the self-suction nozzle can be observed and tested, the impact flow characteristics of two gas and liquid phase injection flows can be observed and tested, the impact performance is understood, the nozzle has a wide application prospect in the aspect of water environment protection, such as pneumatic sediment transportation by impinging jet, the improvement of water quality by jet aeration, and the main engineering fields have river governance, reservoir and pumping station dredging and river pollution control.

The invention discloses an offshore area wetland ecosystem remediation method. The method comprises the following steps that S1, a specific offshore area wetland is selected, and hydrodynamic force, geologies, coast deposition, landform and mangrove forest growth elements of the wetland are observed and investigated; S2, a simulation and analysis optimization design platform is established, the rule of parameters in step S1 and the relation between the parameters are analyzed, and an optimization scheme is designed; S3, a mangrove forest is planted in the selected offshore area wetland according to the optimization scheme in step S2, the survival and growth conditions of the mangrove forest are tracked, and the condition of the ecosystem of the offshore area wetland is observed. By means of the method, the survival rate of the mangrove forest in the offshore area is improved, the ecological state of the offshore area wetland is improved, especially coastal dynamics, sediment transportation and deposition are improved, the purpose of restoring the ecosystem of the offshore area wetland is achieved, and the method has important application value for remediation and sustainable development of the ecosystem of the mangrove forest wetland.

The invention relates to a sand flow sediment transportation monitoring method, and a device adopted in the method is a trapezoidal sand sampler. The sand sampler comprises a sand collection passage, a sand guide passage, a sand storage box, a fixing plate, plugging screws of the sand storage box, and a seal cover. The trapezoidal sand sampler in the method is used for measuring indoor and outdoor sand transportation rate of sand flow and indoor and outdoor sand flow structures, collected sand can be taken out on the spot without the need of opening the sand sampler, and the sand sampler has the advantages of portability and convenience for operation, can improve the working efficiency and reduce the labor intensity, is applicable to areas of wide range, can be used at an arid area and a wet area, can be widely used for researching environment, ecology, aeolian landform, sand-proof engineering and other aspects.

Disclosed is a mud flat wave current oblique crossing simulation method. The method is specially used for simulating the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation on a mud flat. The method is characterized by comprising a mud flat wave current oblique crossing simulation water tank device used in a coast model test and the operating method of the device. The mud flat wave current oblique crossing simulation water tank device used in the coast model test comprises a main current pump, a water tank, an underground reservoir and a wave maker, wherein an outlet of the main current pump is formed in the water inlet end of the water tank, an inlet of the main current pump is arranged in the underground reservoir, the water outlet end of the water tank is connected with the underground reservoir, the main current pump drives water currents to circulate between the water tank and the underground reservoir, and the wave maker is arranged on the left side or the right side of the water tank. The wave current oblique crossing simulation method is specially used for simulating the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation on the mud flat. The riverbed configuration generated by the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation with the mud flat wave current oblique crossing simulation method is basically identical with the natural terrain.

The invention discloses a method for analyzing instantaneous sediment transportation intensity of pebble gravels through images. The method comprises the following steps: continuously acquiring moving sediment images within a preset time period; generating a measuring section for each image; extracting the measuring section at the same fixed position of each image, and reconstructing the extracted measuring sections into a diachronic graph according the sequence of the acquisition time; acquiring the border of each sediment particle in the diachronic graph, and determining the position of the sediment particle in the diachronic graph; counting the number of sediment particles; acquiring the number of total frames and the sampling frequency which are acquired within the preset time period, obtaining the acquisition time according to the number of total frames and the sampling frequency, and according to the acquisition time, the number of the counted sediment particles with the area larger than a preset value as well as positions of the sediment particles, generating a sediment transportation-time graph so as to generate a sediment transportation intensity-time relationship curve. The invention further discloses a system for analyzing the instantaneous sediment transportation intensity of the pebble gravels through the images as well as a method for measuring the instantaneous sediment transportation intensity of the pebble gravels through a river engineering model.

The invention provides a dredging engineering transportation supervision method, which comprises the following steps: receiving position data sent by a ship positioning system, dividing the position data into dredger position supervision data, mud transporting ship position supervision data and mud blowing ship position supervision data according to categories, and grouping according to work areas; according to the current position of the mud transporting ship and a pre-stored route path range of a work area, judging whether the position supervision data of the mud transporting ship is matched with the route path range of the work area, and if not, generating a fence early warning notification instruction according to the position supervision data of the mud transporting ship; and in combination with the channel range mileage and the key sluice area, analyzing a mud transportation track of the mud transporting ship, and generating work order information of bottom mud transportation. The invention further provides a corresponding supervision system, computer equipment and a storage medium, navigation track and working state tracking, abnormity early warning, work order statistics and the like can be carried out on the sediment transportation ship so as to achieve the purpose of refined supervision, and sediment transportation operation can be carried out efficiently, accurately and safely.

The invention provides a device for measuring concentration and graduation of suspended load in real time in site. The device comprises a fish lead, a measuring unit arranged in the fish lead and a computer connected with the measuring unit. The measuring unit comprises a camera, a miniature lens, a laser, a reflector, Powell lenses, a cylindrical convex lens, a refractor set, an ultrasound fathometer and a power supply unit. The front end of the camera is additionally provided with the miniature lens. The laser is arranged on the incident light path of the reflector, the emergent light path of the reflector is sequentially provided with the Powell lenses, the cylindrical convex lens and the refractor set, rectangular piece light collected by the cylindrical convex lens penetrates through the lower portion of the fish lead through the refractor set to illuminate the local water body on the lower portion of the fish lead, a tempered glass observation window is arranged on a bottom shell of the fish lead below the camera, and the power supply unit is connected with the camera, the laser and the ultrasound fathometer. By means of the device, real-time measuring in situ can be achieved, the instant measuring result can be obtained, and the device has the unique advantage of dynamically monitoring the river water and sediment transportation.

The invention discloses a long-distance mud pipeline conveying dynamic model and application. Hydraulic conveying is the main form of silt conveying in dredging engineering. At present, matching of a dredge pump and a pipeline system is mostly quasi-static matching based on performance characteristics of the dredge pump and the pipeline system, the fluctuation of working parameters in the actual conveying process and the influence of dredged object redistribution on the performance characteristics of the whole system are not considered, and certain problems possibly exist for the long-distance high-concentration conveying working condition. Therefore, on the basis of the conveying process of a certain cutter suction dredger on a certain construction site, a large amount of field test data is measured, and a set of complete dynamic conveying theoretical model is established and verified.

The invention discloses a seabed erosion and deposition prediction analysis system and method for a submarine cable routing area. The method comprises the steps: constructing a seabed erosion and deposition prediction model of a to-be-predicted submarine cable routing area through an erosion and deposition prediction model construction module, wherein the seabed erosion and deposition prediction model comprises a hydrodynamic model, a sediment transportation model and a seabed deformation model; solving the seabed erosion and deposition prediction model through a solving module to obtain a seabed erosion and deposition depth prediction value of the to-be-predicted submarine cable routing area; correcting a seabed erosion and deposition depth prediction value through a correction module; predicting a future submarine cable burial depth value through a prediction module according to the corrected seabed erosion and deposition depth prediction value and a submarine cable design burial depth value or a submarine cable burial depth historical detection value; dividing the scour level of the to-be-predicted submarine cable routing area by an evaluation module according to the future submarine cable burial depth value, and then evaluating the scour risk level. The technical problem that an existing seabed erosion and deposition prediction analysis method is low in accuracy is solved.

The invention discloses a cleaning device for removing sand and soil in a dehydrated vegetable raw material without machine halt. The cleaning device comprises a machine body, a conveyer net belt, anadding cabin, a sand and soil conveyer belt machine and a sand and soil depositing tank, wherein the sand and soil conveyer belt machine is arranged inside the machine body; the sand and soil conveyerbelt machine is arranged parallel to the conveyer net belt; the sand and soil conveyer belt machine is positioned right below the conveyer net belt; the sand and soil depositing tank is positioned atone end of the machine body; the sand depositing tank communicates with the machine body; and one end of the sand and soil conveyer belt machine extends into the inner cavity of the sand and soil depositing tank to convey sand and soil on the sand and soil conveyer belt of the sand and soil conveyer belt machine into the inner cavity of the sand and soil depositing tank. According to the cleaningdevice, the sand and soil conveyer belt machine is arranged below the conveyer net belt, after being cleaned off, sand and soil on vegetables penetrate through net holes of the conveyer net belt, aredeposited on the sand and soil conveyer belt machine, are conveyed into the sand and soil depositing tank by the sand and soil conveyer belt machine, and are further discharged, so that sand and soilcleaning without machine halt can be achieved, the conveyer net belt does not need to be disassembled either before sand and soil cleaning, and thus the cleaning device is convenient and rapid in sand and soil cleaning when being compared with a conventional device.

The invention discloses a test simulation system for reservoir sand peak scheduling. The test simulation system comprises a flow control module, a sediment supply module, a water and sediment test module and a discharged sediment collection module, wherein the flow control module is used for customizing a session flood process meeting test requirements; the sediment supply module can be used for configuring sediment carrying water flow meeting test requirements, so that fine simulation of water-sediment asynchronization is realized; the water and sand test module is used for carrying out a reservoir area sand peak scheduling test; the discharged sand collection module is used for water-sand separation and water-sand recovery; in addition, the invention further discloses a corresponding test method, the water and sediment transportation conditions of the reservoir in different dispatching modes can be simulated, refined simulation of reservoir sediment peak dispatching is achieved, and technical support is provided for keeping the effective storage capacity of the reservoir for a long time.

The invention relates to the field of river and lake bottom treatment, and more specifically, to a platform for collecting, grading treatment and resource utilization of river and lake bottom mud. Theinvention proposes a cutter suction boat, and the idea is to add underwater walking wheels to make the hull move automatically. A bottom mud treatment platform is also deployed on such a cutter suction boat to save the cost of bottom mud transportation and become an amphibious bottom mud treatment platform. The cutter suction boat has the characteristics as follows that a number of wheels are arranged on the hull; and height adjustable mechanisms are arranged for at least two wheels. In this way, the cutter suction boat can walk on land and underwater. Because the bottom mud cutter suction mostly happens in a non-deep water area, it is feasible to set the height of the wheels. Such cutter suction boat can greatly reduce the labor intensity of workers and greatly improve work efficiency. The amphibious bottom mud treatment platform has the characteristic that all bottom mud treatment platform units are arranged on the cutter suction boat, and of course, the more ideal amphibious bottommud treatment platform is the new cutter suction boat disclosed in the invention. The treatment platform has the advantages that cutter suction and treatment are combined into one, which greatly saves sediment transportation costs, saves treatment sites, avoids repeated investment in the platform, and is of great significance for accelerating the improvement of the river and lake environment in my country and the world.

The invention discloses a shipborne multifunctional sand taking and island building excavator. The shipborne multifunctional sand taking and island building excavator comprises a ship body (1) as a carrier of whole equipment, a sediment excavation part and a sediment conveying part, wherein the sediment excavation part comprises an excavation conical head (2), a sand taking cutter head (3) and a sediment channel extension sleeve (4); the excavation conical head (2) and the sand taking cutter head (3) are quickly rotated to cut and stir riverbed sediments, and enters an internal spiral drainer(14) to suck in the excavated sediments at high speed; the excavated sediments are backwards conveyed through the sediment channel extension sleeve (4); the sediment conveying part comprises a sediment channel hose (7), a sediment acceleration drainer (8) and a sediment spraying pipe (9); and the backwards conveyed sediments are sucked in at high speed for pressurization, and are sprayed out froma sediment spraying port (11). The shipborne multifunctional sand taking and island building excavator can once continuously finish such working processes as mud excavation, mud carrying and mud unloading, is an excavator with high efficiency and lower cost, is excellent underwater excavation mechanical equipment, can greatly improve the engineering benefit compared with the same type of products.

A silt ecological cleaning system for polluted rivers belongs to the technical field of ecological environment construction and protection and comprises a silt excavating unit, a silt conveying unit and a silt water filtering unit. The silt excavating unit can excavate silt of a riverbed part of a river channel, and the silt excavated by the silt excavating unit is conveyed into the silt conveying unit; the silt conveying unit is used for conveying silt, and the silt conveying unit is used for conveying the silt into the silt water filtering unit; and the silt water filtering unit is used for separating and filtering silt and water. The silt ecological cleaning system for the polluted riverway is high in mechanical automation degree and diversified in function, the silt removing and dredging effects on the municipal riverway are achieved, the phenomenon that the municipal riverway is blocked due to excessive silt is prevented, and the ecological environment of a city is maintained to a certain degree; the device is practical and flexible, can quickly adjust the direction in the space, and can also perform water leakage treatment on the salvaged sludge, thereby reducing the salvage weight and the working load.

The invention provides a water body environment terrain construction method based on scatter data. The water environment terrain construction method comprises the following steps: (1) obtaining terrain scatter data of a target area through field investigation and drawing a CAD graph; (2) extracting transverse distance, longitudinal distance and elevation data of actual measurement points on the cross section of each river channel; (3) carrying out interpolation on each river section by adopting a cubic spline interpolation function; (4) performing linear interpolation on the whole target area through the triangular mesh to obtain a planar topographic map of the target area; (5) converting the planar topographic map of the target area into a riverbed curved surface of the target area; and (6) calculating the thickness of a riverbed movable layer of the target area under the existing hydraulic condition, and vertically stretching the curved surface of the riverbed on the basis of the thickness of the riverbed movable layer so as to complete the construction of the water environment terrain of the target area based on the scatter data. According to the method, the accuracy of the constructed water body environment terrain can be improved, and technical support can be provided for establishing a river flood and sediment transportation and pollutant diffusion model.

The invention provides a conveying device for a sand carrier and a using method of the conveying device, and belongs to the technical field of conveying equipment. The conveying device comprises a rubber conveying belt, a pressing mechanism, a rotating mechanism, a cover plate and a driving structure, the rubber conveying belt is obliquely arranged in a cargo hold of a sand transport ship body, the rubber conveying belt penetrates through an opening and extends to the head of the sand transport ship body, and the pressing mechanism can flatten the rubber conveying belt at the opening. The rotating mechanism can shorten the portion, stretching out of the opening, of the rubber conveying belt and enable the rubber conveying belt to rotate upwards, the cover plate is hinged to the opening, a first sealing mechanism is arranged on the cover plate, and after the portion, at the opening, of the rubber conveying belt is flattened through the pressing mechanism, the cover plate is arranged on the opening in a covering mode. The first sealing mechanism can block a gap between the cover plate and the opening, and the driving structure can enable the cover plate to rotate between the vertical upward direction and the vertical downward direction. Sediment on a sand transport ship is conveyed out through the conveying belt, and the sealing requirement can further be met.

The invention discloses a method for quantitatively detecting the influence of freeze-thaw cycle on bed surface sediment exposure degree. The method comprises the following steps: preparing a sample; pretreating the sample; photographing and recording the pretreated sample; performing freezing and thawing cycle treatment on the sample; and analyzing the sediment exposure degree condition according to observed data. According to the detection method, quantitative detection on the influence of the freezing and thawing cycle on the exposure degree of the bed surface sediment is realized, and the change amplitude of the relative exposure degree of the bed surface sediment before and after the freezing and thawing cycle can be directly and quantitatively given, so that the influence of the freezing and thawing cycle is quantitatively reflected. According to the quantitative detection method disclosed by the invention, the relative exposure degree of the surface sediment particles can be measured more simply, conveniently and intuitively from a microscopic angle, and the quantitative influence of freezing and thawing cycles on the relative exposure degree of the surface sediment particles is represented, so that reasonable parameter values can be realized when sediment transportation calculation is carried out in a cold region river channel.

The invention discloses a hydraulic optimal section design method for an open channel with a rectangular section. The method is characterized by taking a maximum flow modulus principle as a theoretical basis, taking a water flow continuity equation, a water flow resistance equation and a bed load sediment transport rate as control equations in a calculation process, adopting an iterative calculation method, considering the influence of sediment transportation and bed surface deformation in the open channel with the rectangular cross section on the size and the shape of the water-passing cross section of the channel comprehensively, and introducing a physical quantity-flow modulus K in hydraulics to consider the influence of the actual water flow resistance in the channel on the water flow passing capacity comprehensively. The method is a method for designing the hydraulic optimal section of the artificial open channel with the rectangular section based on the maximum flow modulus principle, solves the problems that in an existing design method, the bed surface roughness value is random, and water flow-sediment-riverbed interaction cannot be considered, and makes up the theoretical defects of the method for designing the hydraulic optimal section of the artificial open channel.

The invention discloses a method for cleaning silt in a water inlet pool on the front side of a water delivery pump station. The method comprises the following steps of: S1, enabling a water inlet of the water inlet pool to be opposite to the water delivery pump station, and arranging sedimentation tanks on two sides of the water inlet pool respectively, wherein the sedimentation tanks are separated from the water inlet pool through water retaining walls, each sedimentation tank consists of a silt sedimentation area and a water diversion transition area, and a bottom plate of the silt sedimentation area is lower than bottom plates of the water diversion transition area and the water inlet pool; S2, forming a silt guide groove in the bottom plate of the water inlet pool, wherein the silt guide groove extends to the silt sedimentation area from the water inlet; S3, arranging a bypass water diversion pipe in the water diversion transition area, wherein the bypass water diversion pipe communicates with a water pumping pipe of the water delivery pump station through an electric valve; S4, when the water delivery pump station normally runs, forming a water level difference between the water inlet pool and the silt sedimentation area through the combined action of a flow guide hole formed in the water retaining wall and the silt guide groove, and conveying the silt in the water inlet pool to the silt sedimentation area; and S5, periodically cleaning the silt in the silt sedimentation area by adopting a slurry pump truck in a centralized manner. According to the method, the water delivery pump station does not stop during silt cleaning, and normal water supply is guaranteed.

The invention discloses a calculation method of riverbed erosion and deposition under the action of plane vortex water flow. The method comprises the following steps: collecting river basic data of riverbed erosion and deposition needing to be calculated under the action of plane vortex water flow; establishing a planar two-dimensional or three-dimensional water flow sediment movement mathematical model; calculating river water flow velocity distribution, water depth, plane vortex water flow structure and sediment transportation information; calculating the effective gravitational acceleration of the sediment under the action of the plane vortex water flow; correcting and calculating the settling velocity of the sediment under the action of the plane vortex water flow; correcting and calculating the sediment transport capacity under the action of the plane vortex water flow; and calculating to obtain a riverbed erosion and deposition value under the action of the plane vortex water flow. According to the invention, the riverbed scouring and silting value under the action of the plane vortex water flow can be rapidly and accurately calculated, riverbed scouring and silting calculation when the effective gravity of sediment changes due to the action of the vortex water flow is achieved, the method is closer to the actual situation, and technical support can be provided for comprehensive treatment and protection of a river channel.

The invention relates to the field of oily sludge treatment and in particular to an oil-water separation pry for oily sludge treatment. The oil-water separation pry comprises pulpified material screening device, an oily liquid pre-collection device, a screened material conveying tube pipeline, a three-phase separation device, an oily liquid storage device, a circulation water tube pipeline and anup-to-standard sand conveying machine, wherein the pulpified material screening device is arranged at the upper end of the oily liquid pre-collection device; the lower end of the oily liquid pre-collection device is connected with the three-phase separation device through the screened material conveying tube pipeline; the oily liquid storage device, the circulation water tube component and the up-to-standard sand conveying machine are arranged at the lower end of the three-phase separation device; the circulation water tube component is connected with the pulpified material screening device and the screened material conveying tube pipeline. By adopting the oil-water separation pry, oily liquids, water sources and sand in oily sludge can be effectively separated, a relatively recycling rateof oily liquids in oily sludge is achieved, efficient recycling of the oily sludge is achieved, and separated residues are lower than comprehensive pollution control standards of oily sludge of oil fields.