24 results about "Bed load" patented technology

The invention relates to the technical field of water conservancy and hydropower engineering, and discloses a sediment-carrying bed load riverway water taking structure which comprises a bed stabilizing structure, a flow guiding structure and a water taking structure, the bed stabilizing structure is arranged perpendicular to the water flow direction of a riverway, and one end of the bed stabilizing structure is connected with one side of the riverway; one side of the diversion structure is connected with the other end of the bed stabilizing structure, and the other side is connected with one end of the flood discharge gate; the water taking structure comprises a water taking weir, a pre-sedimentation tank and a sand blocking ridge, the pre-sedimentation tank is arranged on the other side of the river channel, the outer wall of the pre-sedimentation tank is connected with the flood discharge gate, the water taking weir is arranged on the side, close to the flood discharge gate, of the pre-sedimentation tank, and the sand blocking ridge is arranged on the downstream of the pre-sedimentation tank. The water taking structure carries out water taking and desilting, the water diversion and sand prevention problems of the river channel water taking opening are solved, and the operation efficiency of the water taking system is improved.

Embodiments of the present application disclose a river bed load transport characteristic determination method and device, electronic equipment and a computer readable medium, relating to the field of engineering technology. The method performs fast Fourier transform on the sound pressure signals of the microphone array to obtain a sound pressure matrix in the frequency domain; based on the sound pressure matrix, cross-spectrum operation is performed to obtain a cross-spectrum matrix; based on each scanning grid point j on the surface of the monitoring sensor plate as an imaginary sound source point, a sound propagation model is selected according to the aerodynamics theory to determine the sound signal monitored by any microphone; each grid point is scanned, the auto-spectrum of the simulated sound signal is calculated, and the sound source holographic image of the bed load shock wave is determined; the sound source intensity is simulated, the bed load spatial position is obtained, and the bed load particle size component information is obtained through the calibration function relationship. That is, in the present application, the bed load spatial position and the bed load particle size component information are obtained, this method can accurately determine the transport characteristics of the bed load, and becomes an important support for quantifying the disaster prevention and reduction work of mountainous rivers.

The present application relates to the technical fields of water conservancy and hydropower engineering, and discloses a multi-sediment bed load river channel water intake structure, which comprises a stable bed structure, a flow guide structure and a water intake structure, the stable bed structure is arranged perpendicularly to the water flow direction of the river channel, and one end of the stable bed structure is connected with one side of the river channel; one side of the flow guide structure is connected with the other end of the stable bed structure, and the other side is connected with one end of a flood discharge gate; the water intake structure comprises a water intake weir, a pre-sedimentation tank and a sand blocking ridge, the pre-sedimentation tank is arranged on the other side of the river channel, the outer wall of the pre-sedimentation tank is connected with the flood discharge gate, the water intake weir is arranged on the side of the pre-sedimentation tank close to the flood discharge gate, and the sand blocking ridge is arranged downstream of the pre-sedimentation tank, the present application stabilizes the river regime through the stable bed structure, narrows the river bed below the flow guide structure to discharge the bed load, and the water intake structure is used for water intake and sand setting, so that the problem of water diversion and sand prevention of the river channel water intake is solved, and the operation efficiency of the water intake system is improved.

The utility model discloses a bed load collecting device, which relates to the technical field of sediment testing and comprises a water tank, a gripping device mounting area is arranged on the side wall of the water tank, a gripping device and a visual identification mechanism are arranged on the gripping device mounting area, and the visual identification mechanism comprises a fixed light supplementing camera and a laser profile measuring head. The grabbing range of the grabbing device is located in the shooting range of the fixed light supplementing camera and the measuring range of the laser profile measuring head, and the volume, the approximate orientation and the approximate shape of the bed load can be calculated through a volumetric method according to images, shot by the fixed light supplementing camera, of the bed load. Then, the outline of the bed load is measured through the laser outline measuring head, so that the overall outline size and the accurate form of the bed load are obtained, accurate grabbing information is provided for the grabbing device, the grabbing precision is improved, and the defect that the size of the bed load is difficult to clearly know through a camera device in a sediment-carrying basin is overcome.

The invention discloses a pre-embedded bed load sediment transport rate measuring device based on sand wave motion, and the device comprises a measuring module which is used for measuring water pressure and sediment pressure; the pressure sensing module is used for measuring the sum of water pressure and sediment pressure above the inside of the riverbed; the water level measuring module is used for synchronously acquiring water level data; the central processing module is used for extracting sand wave elements including the sand wave height, the sand wave movement speed and the sand wave form coefficient and calculating the bed load sand transport rate; the data transmission module is used for transmitting the bed load sediment transport rate information to a remote terminal; the power supply module is used for supplying power to the pressure sensing module, the water level measuring module, the central processing module and the data transmission module. The method realizes real-time, interference-free and automatic monitoring of the bed load sediment transport rate, has the advantages of high precision, strong adaptability and the like, and is suitable for monitoring the shallow river bed load sediment transport rate.

The invention provides a sand blocking and guiding system and method for water power removal of a water inlet of a hydropower station, and relates to the technical field of water conservancy and hydropower engineering.The sand blocking and guiding system for water power removal of the water inlet of the hydropower station is applied to a power station, and the power station comprises a power station workshop and a drainage sand flushing gate which are arranged at intervals; the sand blocking and guiding system comprises a sand blocking ridge and a longitudinal guide wall, one end of the sand blocking ridge is used for being connected with a rock bank slope, the end, away from the rock bank slope, of the sand blocking ridge is connected with one end of the longitudinal guide wall, and the sand blocking ridge is configured to form an included angle with the main flow direction of a river channel; the end, away from the sand blocking ridge, of the longitudinal guide wall is used for being connected with the interval between the power station workshop and the drainage sand flushing gate, and the upstream face of the sand blocking ridge and the longitudinal guide wall form a flow guide channel used for guiding bed load silt. According to the invention, the bed load silt carried by the mainstream in the river channel at the upstream side of the water inlet of the power station workshop is automatically cleaned at low cost.

The invention discloses a bed load section sediment transport rate modification method. The method comprises the following steps: calculating a plurality of measured bed load section sediment transport rates; calculating the bed load change section sediment transport rate of multiple times of measurement; based on the bed load actually-measured section sediment transport rate and the modified section sediment transport rate which are measured for multiple times, the correlation between the bed load actually-measured section sediment transport rate and the bed load modified section sediment transport rate is established and obtained; and based on the established relationship between the bed load actually measured section sediment transport rate and the modified section sediment transport rate, substituting the bed load actually measured section sediment transport rate of a certain measurement time to obtain the corresponding bed load calculated section sediment transport rate. According to the method, the bed load actually-measured section sediment transport rate is recalculated, the relation between the bed load actually-measured section sediment transport rate and the recalculated section sediment transport rate is established, the bed load recalculated section sediment transport rate is directly obtained, the actually-measured single-width sediment transport rates of all vertical lines of the bed load do not need to be recalculated one by one, the workload is greatly reduced, and the working time is greatly shortened.

The invention relates to an acoustic-seismic combined monitoring method and device for mountain river bed load, and the device comprises a sensing plate which bears the impact of river bed load particles, a seismic detector which collects a vibration signal, and a plurality of microphone elements which independently collect an acoustic signal. The method comprises the following steps of: extracting first-motion waves of a plurality of collected sound signals, passing through the amplitude of each node of a sensing plate, and generating a sound source intensity distribution image, thereby realizing the identification of the spatial position of a bed load on the sensing plate, and calculating a vibration signal wave packet through a system amplitude threshold value; constructing a correlation function to obtain the maximum positive amplitude of a vibration signal wave packet, calculating the particle size of bed load particles, correcting the eccentric error of the vibration signal, improving the recognition precision of the bed load particle size, and further calculating the sediment transport rate in real time. According to the method, the sound signal and the vibration signal are combined, the eccentricity error of the high-frequency geophone signal is recognized and corrected through the spatial position, the recognition precision of the grain size of the bed load is improved through the corrected geophone signal, and inversion calculation of the sediment transport rate is achieved.

The invention discloses a river basin sediment production estimation method based on a dynamic evolution process of a river-blocking barrier lake, and the method comprises the steps: carrying out the comparative analysis of key physicochemical characteristic parameters through an identification event layer in a residual barrier lake deposition sequence, and constructing a disaster chain extreme surface process river basin sediment production estimation method. Water level changes, hydrodynamic conditions and material source changes of the barrier lake are comprehensively analyzed, different sand production stages from the stable period, the decline period and the extinction period of the barrier lake are divided, the sediment change history from lacustrine facies suspended load to flood plain bed load is analyzed, and a complete barrier lake formation-evolution full life cycle evolution process mode is constructed. A layered triangular irregular network model is constructed to obtain layered accumulated sediment volume data, the layered volume and mass are calculated based on a dry density field of sedimentary stratification and spatial interpolation so as to calculate the total sediment yield, a physical information neural network model inverts a sedimentary thickness field, sediment yield estimation is achieved, and the non-stationary dynamic evolution characteristics of water and sediment of the barrier lake are quantified.

This invention discloses a sediment trap to prevent siltation at the tailrace outlet of a hydropower station. It is installed in the river channel at the confluence of the power station's tailrace outlet and the riverbed, and includes an arc-shaped transition section and a straight wall section. The upstream end of the arc-shaped transition section smoothly connects to the upstream bank wall of the river, and the downstream end smoothly connects to the straight wall section. The straight wall section extends along the river's flow direction and stands vertically in the river channel at the confluence of the power station's tailrace outlet and the riverbed. A tailrace flow passage is reserved between the downstream end of the straight wall section and the bank wall. The overall length of the sediment trap is determined based on the overall length L4 of the power station's tailrace outlet. The vertical distances between the starting end and the downstream end of the straight wall section and the power station's tailrace outlet are L1 and L2, respectively. The cross-sectional length of the tailrace flow passage reserved between the downstream end of the straight wall section and the bank wall is L3. By controlling the distances L1, L2, and L3, the impact of the sediment trap on the power station's tailrace elevation is minimized. This invention can prevent sediment from entering the power station's tailrace outlet and forming siltation, ensuring the normal operation of the power station.

This item is a bed load detector that is placed between the legs of a bed and the floor to detect the load applied to the bed.

The invention belongs to the field of hydraulics and river dynamics, and discloses a river bed load sediment transport rate prediction method under the effect of submerged vegetation, which comprises the following steps: firstly determining river near-bottom turbulent kinetic energy under the effect of submerged vegetation, carrying out dimensionless treatment on the river near-bottom turbulent kinetic energy, and then determining a river bed load sediment transport rate prediction model under the effect of submerged vegetation. The method can efficiently and accurately predict the sediment transport rate of the river bed load under the action of submerged vegetation, and provides a theoretical basis for further research on sediment movement characteristics and riverbed evolution rules involved in natural rivers and wetlands with submerged vegetation.

The application provides a method, device and equipment for the coordinated control of channel scouring and evolution, and a storage medium. The method comprises the following steps: first, calculating a correlation coefficient according to a sediment transport potential field and a water depth change, and entering the next step if the verification fails; then, calculating a grouped and ungrouped sediment transport rate according to a real-time particle size distribution, and determining that the gradation is abnormal if the deviation is large. At the same time, the spatial graph convolution topography weight is corrected based on the maximum particle size ratio, the modified eddy viscosity coefficient is determined, the weight coefficient of the bed load is updated, and finally, the multi-physical field coupling model is updated by using the coefficients, so that the prediction accuracy of the channel scouring is improved.

The application discloses a kind of water structure over-flow surface assembly type resistance large particle push sediment scour protection layer and construction method, belong to water construction technical field;A kind of water structure over-flow surface assembly type resistance large particle push sediment scour protection layer includes: the finishing pit formed in the position being destroyed, anchor rod fixed in finishing pit, the reinforced composite base layer formed in finishing pit, and the protection panel of covering integral surface, with anchor rod assembly connection.This application proposes assembly type composite connection system and corresponding structure design, construction method;By introducing rigid mechanical anchoring, constructing reinforced composite base layer, realizing modular assembly, the core problems such as connection unreliable, weak interface existing, maintenance difficult in prior art are systematically solved.

The invention relates to the field of river research, in particular to a bed load sediment transport rate measurer based on river channel desilting, which comprises a fixed cylinder, the inner cylinder is connected in the fixed cylinder; an inner cylinder is connected in the fixed cylinder; the inner cylinder is detachably connected with a plurality of spring telescopic rods; all the spring telescopic rods are jointly and fixedly connected with a collecting hopper, and the collecting hopper slides in the inner cylinder. When bed load falls into the collecting hopper, air in the air storage cavity is pressed into the annular cavity through the one-way valve of the vent hole along with downward movement of the collecting hopper, so that the pressure in the annular cavity is continuously increased, and when the pressure reaches a set threshold value of the pressure valve, the pressure valve is instantly opened, so that high-pressure air in the annular cavity enters the annular pipe from the pressure valve; and then the leaves are sprayed to the filter screen from the spray head, so that the leaves covering the filter screen are blown away and washed away along with water flow, and the filter screen is dredged regularly through pressurized air flow.

The invention provides a slope sediment starting flow velocity and bed load sediment transport rate prediction method and a model building method, and belongs to the technical field of hydraulics and river dynamics in natural science research. The method comprises the following steps: firstly, determining an acting force of sediment on a slope and an expression of the acting force, establishing a stress balance equation of sediment particles in a critical state, and introducing the force expression to obtain a slope sediment starting velocity initial expression; replacing the near-bottom flow velocity in the sediment starting critical flow velocity formula with the vertical line average flow velocity to obtain a slope sediment starting flow velocity prediction formula; parameters are determined according to an open channel sediment critical initial movement flow velocity measurement experiment, fixed parameters of a prediction formula are obtained, and meanwhile, a bed load sediment transport rate expression is established for prediction. According to the method, a sediment starting flow velocity formula which has simple and easily-obtained parameters and is suitable for a slope, a gentle slope and a flat bed is established, the model also comprises the prediction of the sediment transport rate, and the result also has relatively high reliability.

The invention provides a method for synchronously monitoring river bed load and suspended load. The method comprises the following steps: (1) an acceleration sensor and an underwater microphone are fixed in a sealed metal aluminum frame, and the metal aluminum frame is flush with a riverbed; a metal basket is arranged at the lower edge of the metal aluminum frame and used for capturing bed load particles and calibrating sensor data; (2) vertically installing a high-frequency ADCP in the center of a riverbed to measure a flow velocity profile; the high-precision turbidity meter is arranged at the upstream of the high-frequency ADCP to record the suspended load concentration; meanwhile, the electronic water level gauge is installed on the bank of the river channel to record water level changes; and (3) analyzing the particle size distribution and transportation amount of the bed load according to the data processing module, and inverting the suspended load flux in combination with ADCP and turbidity meter data. According to the method, the monitoring precision and efficiency are remarkably improved, interference to river ecology is reduced, and reliable data support is provided for river regulation and ecological restoration in a complex environment.

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 utility model relates to a flood discharge gate flow surface abrasion-resistant structure which is used for preventing a flood discharge gate from being eroded and damaged by bed load and suspended load in water flow sediment and comprises an abrasion-resistant concrete layer and an epoxy mortar layer, the flood discharge gate comprises a gate chamber bottom plate and a gate pier, the abrasion-resistant concrete layer is arranged on the upper surface of the gate chamber bottom plate, and the epoxy mortar layer is arranged on the upper surface of the gate pier. And the epoxy mortar layer is arranged at the overflowing surface position of the side face of the gate pier, extends towards the bottom side of the gate pier and covers the anti-abrasion concrete layer with the preset width, and the overflowing surface position of the gate pier is close to the preset height of the bottom side. According to the anti-abrasion structure for the overflow surface of the flood discharge gate, the anti-abrasion performance of the overflow surface of the flood discharge gate can be improved, and the erosion of high-speed water flow containing silt can be effectively resisted.

The invention discloses a pre-embedded bed surface erosion and deposition rate measuring device based on a pressure sensing technology, and the device comprises a measuring module which is used for measuring the water pressure and the sediment pressure; the pressure sensing module is used for measuring the sum of water pressure and sediment pressure above the inside of the riverbed; the water level measuring module is used for synchronously acquiring water level data; the central processing module is used for obtaining the erosion and deposition rate according to data of the pressure sensing module and the water level measuring module; the data transmission module is used for transmitting the erosion and deposition rate information to a remote terminal; the power supply module is used for supplying power to the pressure sensing module, the water level measuring module, the central processing module and the data transmission module. The method realizes real-time, interference-free and automatic monitoring of the bed load sediment transport rate, has the advantages of high precision, strong adaptability and the like, and is suitable for monitoring the shallow river bed load sediment transport rate.

The application discloses a method for estimating river bed load transport rate and gradation in an area lacking data, and belongs to the technical field of hydrological sediment data processing. The method comprises three steps: data preparation, kinetic parameter calculation, and bed load transport rate and gradation calculation. The application only needs conventional observation data, does not need complex special monitoring data, is simple to operate, and has high calculation precision, solves the problem that bed load parameters are difficult to estimate in an area lacking data, simultaneously realizes accurate estimation of the transport rate and gradation, and is suitable for river dynamics research, water and sediment numerical simulation, water conservancy engineering planning and design and the like.

The invention discloses a hydraulic concrete bed load abrasion simulation device, which relates to the technical field of hydraulic structure safety assessment, and comprises the following steps: simulating real river water flow by adjusting the gradient of a bottom plate, the flow velocity, bed load particles and the like, and reproducing the concrete abrasion damage process. Aiming at the problems that an existing evaluation index is difficult to quantify a punching and grinding process, and response association between damage evolution and multiple indexes is not established, multi-parameter dynamic monitoring and intelligent analysis evaluation of punching and grinding behaviors are realized by integrating a mobile laser ranging system, an ultrasonic nondestructive monitoring device, a digital image analysis technology, a weighing sensing device and the like. The feedback optimization engineering design standard is realized, the hydraulic concrete abrasion protection strategy is formulated, and the accurate prediction of the service life of the structure is realized.

The invention relates to a bed load sand adding device for a sediment model test, and belongs to the technical field of hydraulic model tests. The conveying assembly adopts a multi-layer telescopic design, the extension belt and the transmission belt are arranged side by side in the width direction of the transmission belt, one end of the extension belt in the width direction is slidably connected to the outer surface of the transmission belt in a sleeving mode, rapid locking is combined with the clamping assembly, flexible adjustment of the working face width is achieved, and the device can adapt to model water inlets of different sizes; and the universality and the experiment efficiency of the equipment are obviously improved. Through cooperative control of the second air cylinder of the side supporting assembly, stepless adjustment of the height of the conveying assembly and the inclination angle of the conveying direction can be achieved, the requirements for the height and the inclination angle of sediment entering water can be accurately matched, various water entering states of sediment under the natural condition are effectively simulated, and the richness and the reliability of test data are greatly improved.

The invention discloses a method for estimating river bed load sediment transport rate and grading in a region lacking data, and belongs to the technical field of hydrological sediment data processing. The method comprises the three steps of data information preparation, kinetic parameter calculation and bed load sediment transport rate and grading calculation. The method only needs conventional observation data, does not need complex special monitoring data, is simple and convenient to operate, gives consideration to calculation precision, solves the problem that bed load parameters in areas lacking data are difficult to estimate, synchronously realizes accurate estimation of the sediment transport rate and grading, and is suitable for scenes such as river dynamics research, water and sediment numerical simulation and hydraulic engineering planning and design.