18 results about "Sediment transportation" patented technology

The invention discloses a river sediment scouring and silting simulation method, and belongs to the technical field of hydraulic engineering and hydrological simulation. In order to solve the problem that it is difficult to accurately simulate the river sediment erosion and deposition evolution trend in the prior art, the method comprises the steps that on the basis of actually measured topographic data and channel chart data of a target river reach, a water-sediment coupling mathematical model is constructed by adopting a non-uniform sediment unbalance sediment transportation theory, and the model interacts with a water power module and a wave module in real time through an MCT coupler; actually measuring a flood and water and sediment series data calibration verification model; and obtaining future water and sediment process data predicted by a plurality of climate modes, inputting the future water and sediment process data into the verified model, dividing river reaches according to the characteristics such as riverbed gradient and river channel curvature, and calculating the erosion and deposition amount of each sub-river reach in the future 50 years. The method can simulate water flow and sediment movement of rivers, reservoirs and lakes, can be applied to the fields of riverway regulation planning, flood control and disaster reduction decision making, reasonable development and utilization of water resources and the like, and provides important data support and scientific basis for construction and management of water conservancy projects.

The invention discloses a reservoir desilting method and device using fixed jet flow, and relates to the technical field of water conservancy and hydropower engineering desilting. According to the method, the flow speed, pressure, mud layer thickness and gradient parameters of water around a nozzle are collected in real time; calculating a jet flow angle compensation coefficient, and identifying a nozzle direction stable state; on the basis of a nozzle set with stable direction, a nozzle group is constructed and a time sequence differential control table is established by combining a topological relation between nodes and disturbance propagation characteristics, so that ordered migration of turbulent flow disturbance is realized; sediment concentration, flow velocity and flow data are collected in a flow guide plate and a sediment discharge port area, and a desilting efficiency index is calculated and used for evaluating sediment transportation continuity and flow guide performance; and a comprehensive operation optimization coefficient is generated through a multivariable adaptive weighted fusion algorithm, and the system automatically executes adaptive regulation or sends out a manual intervention prompt. According to the method, self-monitoring, self-correction and global optimization of the fixed jet system can be achieved, and the reservoir dredging efficiency and the operation stability are remarkably improved.

The utility model discloses a mud-water separation treatment device, which relates to the technical field of mud-water separation, and comprises a mounting platform, the inner side of the mounting platform is fixedly connected with a collecting table, and the upper side of the mounting platform, close to the left and right sides, is fixedly connected with four vortex separators which are distributed in a rectangular shape; a discharging pipe is fixedly connected to the middle of the lower side of the collecting table, stirring mechanisms are movably connected to the positions, close to the upper side, of the front wall and the rear wall of the collecting table in a sleeving mode, and a conveying mechanism is movably connected to the outer side of the vortex separator in a sleeving mode. According to the mud-water separation treatment device disclosed by the utility model, the collecting table is arranged at a high position, and then the silt discharge hole of the vortex separator is directly formed in the collecting table, so that the vortex separator directly discharges silt into the collecting table, the silt is conveyed into the silt treatment device by utilizing gravity, and a mechanism pipe can be quickly disassembled when the device is blocked; and the operation is convenient, and the problem of blockage caused by direct pipeline conveying is avoided.

The invention relates to the technical field of environmental treatment, in particular to an inland water sediment treatment system and method. The system comprises a suction unit, a temporary storage unit, a mixing unit, a curing and adding unit and a dehydration storage yard, wherein the suction unit is used for extracting bottom mud of a water body and conveying the bottom mud to the temporary storage unit, the curing and adding unit is used for injecting a stabilizer into the mixing unit, and the mixing unit enables the bottom mud, airflow and the stabilizer to form a uniform gas-liquid-solid three-phase system; high-risk exchangeable heavy metal, high-risk carbonate combined heavy metal and high-risk iron and manganese oxide combined heavy metal are directionally converted into stable mineral phases, dewatering and pennisetum hydridum planting are matched, residual heavy metal is adsorbed for a long time by means of the hyperaccumulation characteristic of pennisetum hydridum, and end ecological management and control are achieved. According to the scheme provided by the invention, the links of desilting, heavy metal curing, dewatering and repairing are integrated, so that the equipment redundancy can be effectively reduced, meanwhile, the requirement of large-scale bottom mud outward transportation and disposal can be omitted, and the transportation and landfill cost is greatly reduced.

The invention provides a water storage area hydrological condition information calculation method and device and related equipment, and the method comprises the steps: obtaining the water level data of a water inlet of a water storage area and the sediment deposition data of a target area in the water storage area; according to the water level data, the water flow speed of the target area in the target time period is calculated; calculating the sediment transport rate of the target area in the target time period according to the water flow velocity and the sediment deposition data; and hydrological condition information of the water storage area is obtained through calculation according to the water flow speed and the sediment transportation rate. Therefore, compared with a mode of manually calculating the hydrological condition information of the water storage area, the method can remarkably improve the calculation efficiency of the hydrological condition information of the water storage area.

The utility model discloses channel dredging spoil mud and sand separation treatment equipment which comprises a flushing tank, the bottom of the flushing tank is communicated with a settling tank, the left side of the top of the flushing tank is communicated with a flushing water pipe, and the right side of the top of the flushing tank is communicated with a mud and sand conveying pipe. The oscillating hammer is driven by the driving motor to rotate to be in discontinuous contact with the bottom of the sieve plate, so that the right side of the sieve plate shakes up and down to shake off large gravel above the sieve plate into the separation pipe, then the large gravel falls into the coarse sand box to be collected, and the large gravel enters the coarse sand box and then is filtered through the filter plate; water containing fine gravel and soil flows into the settling tank to be settled, and fine sand grains can be discharged through the sand discharging valve pipe, so that large-particle stones and gravel in silt can be conveniently separated, coarse and fine sand can be conveniently screened, large stones are prevented from entering a pipeline to cause pipeline blockage, and the screened sand can be conveniently taken out; and the use of a user is facilitated.

The invention relates to the technical field of coast engineering analysis, in particular to a sandy coast stability-oriented multi-factor coast system restoration optimization method, which comprises the following steps of: identifying a to-be-restored section which faces a serious erosion or degradation problem in a target sandy coast; setting a repairing target; constructing a multi-factor restoration scheme set comprising engineering measure factors and ecological measure factors; based on simulation of a preset hydrodynamic force-sediment transportation coupling model, an evaluation index of each restoration scheme simulation result is extracted; comparing the evaluation index of each repair scheme with a repair target, and calculating a comprehensive benefit value of each repair scheme; selecting the restoration scheme with the highest comprehensive benefit value as an optimal restoration scheme; and outputting an optimal repairing scheme. According to the method, each restoration scheme is converted into a physical input scene in the model by establishing the hydrodynamic force-sediment transportation coupling model, and the dynamic response of the restoration scheme to shoreline change and vegetation survival is simulated and predicted.

The utility model discloses a double-layer cofferdam for an anti-scouring bridge, which comprises an inner cofferdam, an outer cofferdam positioned on the outer side of the inner cofferdam and at least one protection unit positioned on the outer side of the outer cofferdam and used for conveying silt on the downstream of the outer cofferdam to the upstream of the outer cofferdam, the outer cofferdam comprises a tip upper outer cofferdam plate facing the water flow direction, two side outer cofferdam plates connected with the tip upper outer cofferdam plate through positioning columns and a lower outer cofferdam plate connected with the two side outer cofferdam plates. According to the utility model, the problem of sediment loss caused by river scouring near the cofferdam is solved.

The application discloses a three-degree-of-freedom underwater dredging robot structure and a dredging method, and the structure comprises a cutter suction dredging mechanism, a connecting device and a caterpillar type pressure-resistant power chassis. The cutter suction dredging mechanism comprises a cutter suction dredging arm, a pump suction pipeline, a submerged slurry pump and a sediment conveying pipe; the connecting device comprises a pluggable connecting plate and a fixing pin shaft; and the caterpillar type pressure-resistant power chassis comprises a three-degree-of-freedom mechanical arm support frame, a caterpillar system and a chassis support frame. The application adopts full electric drive in general, has fewer lines and pipelines, guarantees compactness of the robot structure, makes the robot more convenient to carry and transport, and is more flexible in movement. The front end of the three-degree-of-freedom mechanical arm support frame provided by the caterpillar type pressure-resistant power chassis can be connected with the dredging arm in a pluggable mode through the connecting device, so that the dredging arm is convenient to disassemble and maintain, and the three degrees of freedom fully meet the movement requirements in the dredging process.

The invention relates to the technical field of soil erosion assessment, and provides a sediment transport assessment method and system based on vegetation dynamics, a medium and equipment, and the method comprises the steps: dynamically selecting a comprehensive roughness factor or a normalized vegetation index for each pixel in a to-be-assessed region based on a drought index, so as to calculate slope weighting factors of different pixels, calculating a connectivity index by combining the gradient of each pixel and the length of a water flow path from the steepest slope direction to the downstream river channel; and for each grid in the to-be-evaluated region, based on the connectivity index, calculating to obtain a sediment transport rate, based on daily precipitation, determining a transport threshold factor, utilizing the transport threshold factor to dynamically regulate and control the sediment transport rate, and taking the product of the regulated and controlled sediment transport rate and the soil erosion amount as the sediment yield. The connectivity of an overestimation vegetation extremely sparse region can be avoided, so that the precision of sediment yield assessment is improved.

The invention discloses a control system and method for reservoir desilting and sand conveying pipelines serving as clean water of sludge stacking reservoirs to return to the reservoirs, and relates to the technical field of reservoir desilting, the control system comprises three reservoir tail sludge reservoirs, a water pumping component, a sedimentation component and a water return component, the water return component and the water pumping component are arranged at the ends of the reservoir tail sludge reservoirs, and the number of the reservoir tail sludge reservoirs is three; the water pumping component comprises a silt conveying pipeline and a silt pump, the silt pump is arranged on the upper portion of the reservoir tail silt reservoir and connected with the silt conveying pipeline, and the silt conveying pipeline is designed in a closed mode. According to the control system and method for the reservoir desilting and sand conveying pipeline serving as the clean water returning of the sludge stacking reservoir, the sludge is conveyed to the sludge stacking reservoir soil field at the tail of the reservoir for centralized treatment through the conveying pipeline, water flows back to the reservoir, cyclic utilization and closed treatment of water resources are achieved, the reservoir desilting cost is saved, and the water quality and the water amount are guaranteed.

This invention discloses a continuous treatment method for environmentally friendly dredging and solidification of polluted river and lake sediment, belonging to the field of environmental engineering technology. The method includes the following components: S100 ecological dredging control range and depth, S200 sediment transportation and dewatering, S300 solidification and resource utilization, and S400 residual water treatment and reuse. By accurately determining the control range and depth of ecological dredging and using a hydrodynamic model to simulate the influence of flow velocity and direction on the migration and transformation of pollutants in sediment, this method effectively avoids large-scale release of pollutants during dredging. At the same time, in the sediment transportation and dewatering stage, efficient transportation equipment and optimized filtration devices are used to reduce disturbance and release of sediment during transportation and dewatering, further reducing the risk of secondary pollution.

The invention relates to the technical field of water conveying pipelines, and discloses an inverted siphon mud discharging device which comprises a water inlet pipe, a water outlet pipe, an inverted siphon, a sediment storage pipe, a first valve, a pressurizing assembly and a sediment discharging assembly. The first valve is arranged between the sediment storage pipe and the inverted siphon, the pressurizing assembly is arranged at one end of the sediment storage pipe, and the sediment discharging assembly is arranged at the end, away from the pressurizing assembly, of the sediment storage pipe. Sediment can be conveyed into the sediment discharging assembly in cooperation with the pressurizing assembly, the sediment is prevented from being deposited in the inverted siphon, the water conveying capacity of the inverted siphon is guaranteed, the structure is simple, operation is convenient, and the pipeline does not need to be manually cleaned.

The present application provides a kind of multi-pit pond area sediment transport ratio optimization calculation method and system, it is related to water and soil conservation and sediment transport technical field, method includes obtaining the grid data (such as type, area, water storage capacity, hydraulic residence time and hydrological characteristics) of pit pond;Calculate sediment interception efficiency and flow delay factor;Optimize confluence time;Iterative calculation of sediment transport influence;Optimize sediment transport ratio.The present application improves the accuracy of sediment transport prediction, reflects the unique characteristics of multi-pit pond area, and provides support for watershed sediment management.

The invention discloses a bed load continuous monitoring device based on multi-source acoustic vibration signal fusion and a sediment transport rate inversion method. The device comprises a bed load transportation multi-source acoustic vibration signal observation platform, a vibration impact plate, a vibration sensor, a hydrophone, a bed load high-frequency acoustic vibration signal collector and a soft network. According to the method, the collected high-frequency acoustic vibration signals are analyzed and extracted, the relation between the time-frequency characteristic values of the high-frequency acoustic vibration signals and the actually-measured bed load sediment transport rate and flow is established, the bed load transport high-frequency acoustic vibration signal characteristic values are optimized based on the random forest algorithm, and key high-frequency acoustic vibration signal characteristic values are screened out; and the BP neural network model is trained together with the actually measured bed load sediment transport rate, so that the effective measurement of the bed load sediment transport rate is realized. According to the invention, stable online monitoring of the bed load transportation process under long-term, continuous and strong disturbance conditions is realized, and effective decoupling and high-precision inversion of sediment transportation kinetic force information are realized through collaborative perception and intelligent identification of sound-vibration heterogeneous signals.

The application discloses a sand scouring and backfilling balance device for a riser and a flat pipe joint section, which comprises a support frame, an anti-scouring assembly and a sand backfilling mechanism, the anti-scouring assembly is fixed at the top end of the support frame, the anti-scouring assembly is arranged to slow down the flow rate of ocean current and block part of the sand in the ocean current from being carried away and falling around the sand backfilling mechanism, the sand backfilling mechanism is installed on the inner side of the support frame and can convert the kinetic energy of the ocean current into its own kinetic energy to transport the sand below to the riser and the flat pipe joint section, through the arrangement of the anti-scouring assembly and the sand backfilling mechanism, the sand scouring and backfilling balance function of the riser and the flat pipe joint section is realized, a series of problems caused by the loss of support of the riser bottom due to the suspension of the joint section is avoided, and the joint section is protected; the whole device can be arranged according to the actual marine situation and pile foundation arrangement, can be recycled and reused, and economic cost is saved.

The present application belongs to the technical field of shield mud treatment, and discloses a mud treatment system, which comprises a sedimentation tank, a storage tank, a mud mixing tank and a clean water tank. The sedimentation tank is communicated with a mud discharge pipeline, and a plurality of partitions are arranged in the middle of the sedimentation tank. The plurality of partitions divide the sedimentation tank into a plurality of sub-sedimentation tanks. A grid is arranged in each of the plurality of sub-sedimentation tanks, and a V-shaped chute is arranged at the bottom of each sub-sedimentation tank. An overflow port is formed in each partition, and a plurality of overflow ports are arranged staggeredly. The storage tank is communicated with the V-shaped chute, and the V-shaped chute can deliver the silt to the storage tank. The mud mixing tank is communicated with the storage tank and a mud delivery pipeline, and a vibrating pipe and a spiral mud are arranged in the mud mixing tank. One side of the clean water tank is communicated with the sub-sedimentation tank, and the other side is communicated with the mud mixing tank. Through the arrangement, the mud-water separation effect is good, the slurry can be reused, the efficiency of the new slurry preparation is high, the quality of the mud can meet the requirements of the mud-water shield scale model test, and the accuracy of the results of the mud-water shield scale model test is ensured.

The invention relates to the field of protection of offshore wind turbine pile foundations, in particular to an offshore wind turbine pile foundation scour pit self-repairing system and an application method of the offshore wind turbine pile foundation scour pit self-repairing system. The silt adsorption device is arranged in the net bag and is used for capturing suspended silt entering along with the water flow and promoting the suspended silt to settle; the sand collecting box is arranged on the periphery of the fan pile foundation, the bottom end of the net bag and the bottom end of the sediment adsorption device are arranged on the top of the sand collecting box, sand penetrating holes are formed in the top of the sand collecting box, suspended sediment captured by the sediment adsorption device can penetrate through the sand penetrating holes to settle into the sand collecting box to be collected, and a sand conveying opening is formed in the lower portion or the bottom of the sand collecting box; the connecting assembly is arranged on the sand collecting box and used for fixing the whole automatic sand collecting device to a seabed; and the sand conveying pipe is connected with the sand conveying opening and used for conveying the sand collected in the sand collecting box into the scouring pit. The device can automatically repair the scour pit around the fan pile foundation.