596 results about "Sediment" patented technology

The invention discloses an indoor water tank sediment starting speed measurement system and method, and aims to solve the technical problem that data accuracy is affected due to the fact that a sensor disturbs a flow field in an existing measurement method. The core of the technical scheme is that the non-contact measurement characteristic of the PIV technology is applied to the whole process from flow field construction to data acquisition. The device is mainly composed of an imaging unit, a laser lighting unit, a movable sliding frame, a water flow adjusting unit and a buffer plate. Optical measurement is carried out through the imaging unit and the laser illumination unit, a physical sensor does not need to be arranged in a flow field, and interference of a measuring instrument on a water flow structure and a sediment starting process is fundamentally avoided. The movable sliding frame which is integrally designed integrates the functions of sediment laying, particle throwing and measuring, so that a test area can be quickly positioned; and the buffer plate and the water inlet and drainage adjusting unit are combined, so that a gradually-changed flow field from weak to strong can be accurately and stably simulated.

The invention provides a digital twin model correction method and system based on machine vision. The method comprises the steps that a comprehensive data set is constructed by collecting sounding data, tidal flow velocity data and unmanned aerial vehicle images, wave disturbance deviation and water surface reflection distortion are eliminated based on geometric feature matching, and a dynamic compensation coefficient is generated in combination with tidal parameters; after time deviation of sounding data is corrected, a dynamic incidence relation between terrain elevation and sediment migration rate is calculated, a digital twinborn model fusing sedimentary layer thickness distribution and tidal flow velocity driven erosion boundary prediction is established, and a visual terrain curved surface is generated; through reverse verification of real-time sediment accumulation characteristics and terrain curved surfaces, migration rate weight parameters are adjusted in a self-adaptive mode, and dynamic optimization of the model is achieved. High-precision dynamic coupling simulation of sea area terrain evolution and sediment migration is achieved, the real-time performance and reliability of island surface change prediction are improved, and coastal zone safety and economic collaborative decision making is supported.

The invention relates to the technical field of hydraulic engineering safety monitoring, in particular to a safety monitoring method and system for a flood discharge and sand flushing service gate. The method comprises the steps that a super-strong permanent magnet sensor is installed on an underwater flood discharge and sand flushing service gate, and the magnetic attraction strength of the super-strong permanent magnet sensor is controlled according to real-time water flow; when the real-time water flow is larger than the preset water flow high threshold value, the magnetic attraction strength is enhanced; if the water flow is lower than the preset water flow high threshold value, the magnetic attraction strength is recovered to the standard magnetic attraction value; the ultra-strong permanent magnet sensor monitors vibration state data and dynamic stress data of each structure in the operation process of the underwater flood discharge and sand flushing service gate; obtaining a rigidity evaluation value and a dynamic stress safety evaluation value of the underwater flood discharge and sand flushing service gate; and performing evaluation in combination with the characteristic data in the operation process of the underwater flood discharge and sand flushing service gate to obtain the safety coefficient of the current underwater flood discharge and sand flushing service gate. The stability of the gate is dynamically enhanced, the magnetic attraction strength is matched with water flow impact in real time, and high-flow-speed loads are effectively resisted.

The invention provides a deep-sea rare earth deposit mine collecting car and an operation method thereof. According to the method, a double-S-shaped reciprocating collection path is planned through an intelligent controller on the basis of a mining vehicle carrying a multi-stage collection device and aiming at the characteristic that deep sea rare earth is enriched in a sheet and multi-layer mode. According to the difference between the depth and compactness of the sediments, three stages of cutter suction units are adopted for layered collection: the first stage is used for 0-2m surface soft sediments, and the rotating speed of a reamer is 200-400r / min; the second stage is used for 2-4m middle-layer compact sediments, and the rotating speed is 350-600r / min; the third stage is used for 4-10m deep high-strength sediment, and the rotating speed is 500-700r / min. The terrain, posture and pressure are monitored in real time during operation, the posture, speed and obstacle avoidance of the vehicle body are automatically adjusted, and stable collection is achieved. The method has the advantages of accurate layering, comprehensive coverage, small environmental disturbance and high reliability, and is suitable for efficient, safe and environment-friendly collection of deep sea rare earth deposits.

Provided is an environment-friendly mobile collecting box for decoration cutting dust. The mobile collecting box comprises a box body, wherein a water tank is fixedly mounted on one side of the bottomsurface of the inner wall of the box body, the bottom surface and the outer side of the water tank are fixedly connected to the inner wall of the box body separately, the inner side of the water tankis fixedly connected to one side of the box body, and openings are formed in the top surface and the other side of the box body; a first through hole is formed in the bottom of the inner side of theinner wall of the water tank, a switching valve is disposed in the first through hole, and a second through hole is formed in one side of the box body; the interior of the first through hole communicates with the interior of the second through hole, and the second through hole communicates with the interior of the box body; the top surface of the water tank is fixedly connected to one end of a hose, and the other end of the hose is arranged in the box body, and a floating plate is fixedly mounted on the periphery of the other end of the hose. Sediment in the box body can be pushed directly into the garbage bag through cooperative use of a mud box and a garbage bag, and the mud box can be taken and placed freely; after the mud box is taken out, a sealing cap of the garbage bag containing the sediment is removed, and after the garbage bag is replaced by a new garbage bag, the mud box is put back, and the sediment is not in contact with the mud box, and cleaning of the mud box by a user is not needed, so that time and labor are saved.

The invention discloses a comprehensive detection processing and analysis method and system for a deep foundation trench of an immersed tunnel, and relates to the technical field of data processing, and the method comprises the steps: firstly carrying out the acoustic calibration of a multi-beam array in a foundation trench region, and compensating a beam incident angle and echo delay, so as to eliminate systematic sounding errors; then macroscopically scanning the foundation trench based on the corrected sounding equipment to generate a high-resolution three-dimensional point cloud, identifying abnormal elevation change in real time and dynamically adjusting the dredging depth; then multi-frequency acoustic detection is carried out on the silt sediment, a float sludge thickness cloud picture is drawn to evaluate a loose structure, and targeted compensation is carried out; finally, the topographic form and the sediment structure change are jointly used for construction early warning, a closed-loop system from precision calibration to anomaly detection to physical property diagnosis and risk early warning is formed, the precision and integrity of foundation trench depth measurement and sludge monitoring are remarkably improved, potential risks can be found and corrected in time in construction, and the construction efficiency is improved. And the construction safety and efficiency of the immersed tunnel deep foundation trench are guaranteed.

The application relates to the technical field of sediment sampling, and discloses a river water environment treatment and improvement device, which comprises a fixing frame, the inside of the top end and the bottom end of the fixing frame is provided with a sliding rail, the inside of the sliding rail is provided with a sampling assembly for collecting sediment, the sampling assembly comprises a bottom support column, the bottom support column is in sliding connection with the sliding rail, the top of the bottom support column is fixed with a supporting rod, the top of the supporting rod is fixed with a sampling cylinder, the surfaces on the two sides of the sampling cylinder are fixed with connecting blocks, the river water environment treatment and improvement device can intercept garbage and sundries in the sediment in the water body through a filter screen, the probability of garbage entering the inside of the sampling cylinder is reduced, the water flow is limited through the conical pipe shape, the water body shunted by the filter screen can be recombined, a certain flow rate can be maintained to wrap the sediment and enter the inside of the sampling cylinder, the precision of sampling sediment is improved, and the efficiency of water environment treatment is effectively improved.

The invention relates to the technical field of hydraulic engineering safety monitoring, and particularly discloses a reservoir dam safety assessment method based on strategy optimization, which comprises the following steps: collecting sediment accumulation rate and underground water level change rate data in real time through a distributed sensor network, and extracting multi-scale features by adopting variational mode decomposition and wavelet packet transformation; constructing a sedimentary anomaly characteristic value and a water level disturbance characteristic value in combination with the energy entropy and the fluctuation amplitude; fusing the two types of features into a dam body safety feature vector, inputting the dam body safety feature vector into a deep learning model for multi-dimensional risk assessment, and outputting a dam safety level; furthermore, a feedback control loop is constructed based on a digital twinning technology and a meta-learning framework, dynamic adjustment of monitoring frequency and an early warning threshold value and automatic generation of a reinforcement strategy set are realized, a closed-loop intelligent regulation and control mechanism is formed, and the real-time performance, the accuracy and the autonomous decision-making capability of dam safety management are improved.

The application discloses an indoor water tank sediment starting speed measurement system and method, and aims at solving the technical problem of sensor disturbance to a flow field and influence on data accuracy in the prior art measurement method.The technical scheme core is that the non-contact measurement characteristics of the PIV technology are applied to the whole process from flow field construction to data acquisition.The device is mainly composed of an imaging unit, a laser illumination unit, a movable sliding frame, a water flow adjusting unit and a buffer plate.Optical measurement is performed through the imaging unit and the laser illumination unit, and physical sensors do not need to be arranged in the flow field, so that the interference of the measuring instrument on the water flow structure and the sediment starting process is fundamentally avoided.The integrated movable sliding frame integrates the sediment laying, particle throwing and measurement functions, and is convenient for quickly positioning a test area;in combination with the buffer plate and the water inlet and drainage adjusting unit, a gradually changing flow field from weak to strong can be accurately and stably simulated.

The invention discloses a pile foundation settlement detection method and system applied to gradient sediment, which is applied to the technical field of data processing and comprises the following steps: acquiring initial density data and conductivity data of sediment and penetration resistance data of a pile foundation; analyzing and identifying the profile map to obtain gradient density data; the profile map is obtained by cutting the three-dimensional image of the sediment in a selected direction; performing differential processing on the gradient density data to obtain density distribution information; performing mechanical characteristic enhancement processing on the penetration resistance data to obtain density continuous distribution information; determining a bearing capacity reduction coefficient based on the density continuous distribution information; performing feature extraction processing on the conductivity data to obtain a sediment activity index; and inputting the sediment activity index and the bearing capacity reduction coefficient into a pile foundation settlement calculation model to obtain pile foundation settlement data. According to the method provided by the invention, accurate detection of the settlement of the pile foundation can be realized.

The invention discloses a method for non-intrusive detection of pipeline sediments through a sound wave array, and belongs to the technical field of sound wave detection. The invention discloses a method for non-intrusive detection of pipeline sediments by a sound wave array. The method comprises the following steps: step 1, mounting a plurality of sensor groups on a detected pipeline in sequence; 2, acquiring historical flow velocity data and historical sound velocity data of each detection point of the detected pipeline under the deposition-free working condition through a sensor group; and 3, monitoring the flow velocity data of each detection point in real time according to each sensor group, comparing the flow velocity data monitored in real time with historical flow velocity data, and judging the deposition state of each detection point. According to the invention, the sonic sensor arrays distributed along the circumferential direction and the axial direction of the pipeline are adopted, and synchronous, in-situ, non-intrusive and real-time high-precision measurement of the sediment thickness, the three-dimensional space distribution form and the medium flow velocity is realized on the premise that the operation of the pipeline is not interfered.

The invention relates to the technical field of water environment monitoring and water ecological protection, solves the technical problem that hydrology, water quality, vegetation and bottom mud monitoring are mutually dispersed and are difficult to correspond in the prior art, and particularly relates to a lakeside microenvironment composite monitoring pile and an ecological disturbance evaluation method. The composite monitoring piles sequentially comprise an overwater area, a variable water level zone monitoring area and an underwater area in the vertical direction, the bottoms of the composite monitoring piles are fixed to bottom mud, the multiple composite monitoring piles are arranged according to the water depth gradient of 0-20 cm, 20-50 cm and 50-100 cm, a hydrodynamic force disturbance index and a microenvironment response index are established by comparing base line and disturbance working condition monitoring results, a composite ecological disturbance index is established, and the water level zone monitoring area and the water level zone monitoring area are located in the bottom mud. The method is used for quantitatively evaluating lakeside disturbance intensity and engineering measure effects. According to the method, quantitative and graded evaluation of the ecological disturbance degree of the lakeside zone is realized, and a scientific basis is provided for lakeside zone revetment form optimization, ecological restoration measure arrangement and water function zone management.

The invention provides a decision-making method and system for the influence of water and sand linkage above a slope on the erosion amount below the slope. The system comprises an experiment control unit, an REE element layout unit, a dynamic monitoring network unit and a data acquisition and analysis unit. The experiment control unit comprises a parameterization experiment design module and a process sample dynamic sampling module, and the REE element laying unit comprises a layering marking module and a tracer agent selection and stability control module; the method not only objectively describes the temporal and spatial change rule of relative erosion amounts of different parts of the slope in the erosion occurrence process, but also can continuously analyze the influence of water and sand coming from the upper part of a certain section of the slope on the erosion process below, thereby dynamically judging and measuring the slope sediment source and analyzing the influence of water and sand linkage above on the erosion process below. The purpose of monitoring the sediment source and the soil erosion amount of different terrain parts is achieved.

The invention relates to the technical field of intelligent monitoring, and discloses a full-automatic sediment monitoring method and system.The method comprises the steps that a water sampling and distributing unit samples a target water area based on real-time sampling control parameters and conveys a sampled first water sample to a flow cell unit based on sampling control parameters; the flow cell unit simulates and forms a water sample monitoring water area environment matched with the target water area condition; the detection unit detects the water sample in the flow cell unit through a target detection method based on the detection control parameters to obtain a sediment detection result at least containing the sediment content; the reserved sample unit is used for extracting a reserved sample water sample for verifying the sediment detection result from the flow cell unit based on the reserved sample control parameters, and storing the reserved sample water sample and corresponding multi-dimensional water sample parameters. Therefore, the sediment condition of the related water area can be automatically and intelligently tested based on the full-automatic sediment monitoring system, and the testing efficiency and testing accuracy of the sediment condition can be improved.

The invention discloses a sediment collection and supply integrated device for offshore wind turbine pile foundation scour prevention, which is arranged around the periphery of an offshore wind turbine single pile foundation, relates to the technical field of offshore wind power engineering, and comprises an annular sand collection unit, a sand storage unit, a sand unloading unit and a sand supply guide unit which are communicated from top to bottom; the annular sand collecting unit guides sediment in ocean current to be deposited and collected, the sand storage unit receives and stores the collected sediment, and the sand unloading unit can seal a bottom outlet of the sand storage unit in an opening and closing mode; the sand supplementing guide unit directionally guides the discharged silt to the scouring pit; the mechanical triggering unit and the elastic resetting unit are used for opening and resetting the sand unloading unit. Sediment carried by ocean current is utilized, through pure mechanical passive operation, integrated self-circulation of collection, storage, triggering, release and supply of the sediment is achieved, external energy is not needed, the self-adaptive adjusting capacity is achieved, and the construction and operation and maintenance cost is remarkably reduced.

The invention relates to a coastal zone sediment erosion pore scale flow field observation system and observation method. The observation system comprises a wave-flow water tank, a sediment accumulation body arranged in the wave-flow water tank and PIV equipment used for observing the internal flow field and the pore size of sediment. A wave making plate and a wave dissipating plate opposite to the wave making plate are arranged in the wave flow water tank, experimental fluid used for simulating waves is arranged between the wave making plate and the wave dissipating plate, and a wave height meter floats on the experimental fluid; the sediment accumulation body is formed by accumulation of transparent solid particles with the same refractive index as the experimental fluid; the PIV equipment comprises a laser light source and a camera, the laser light source is focused on the sediment accumulation body, and the camera directly faces the sediment accumulation body and is used for collecting images. Compared with the prior art, a clearer sediment pore internal flow field image is obtained through the combination of the refractive index matching technology and the image particle velocity measurement method, so that effective observation of the pore scale flow field eroded by the sediment in the coastal zone is realized.

The invention belongs to the technical field of river and lake water ecological restoration, and particularly discloses equipment and a method suitable for river and lake endogenous polluted sediment treatment, the equipment suitable for river and lake endogenous polluted sediment treatment comprises a material stirring unit and a curing granulation unit, the material stirring unit comprises a horizontal stirring machine box and is used for stirring and mixing raw materials, and the curing granulation unit is used for curing and granulating the raw materials; one side of the horizontal stirring machine box is connected with a loess spiral feeder, a bottom mud spiral feeder and a curing agent spiral feeder, and a loess crusher is connected between the loess spiral feeder and the horizontal stirring machine box. According to the method, the polluted bottom mud is efficiently converted into the ecological restoration matrix which is resistant to water flow scouring and stable in physical structure through a curing granulation process, the matrix can be directly applied to an underwater environment, and the core problem that existing ecological planting soil prepared through bottom mud recycling cannot be stabilized in a water area is solved; and a key matrix material is provided for in-situ construction of an underwater ecological system such as an underwater forest.

The invention relates to the technical field of intelligent sampling, in particular to an unmanned aerial vehicle water sediment intelligent sampling method and system based on rotational flow sorting, and the method comprises the following steps: collecting disturbance trajectory and rotational flow data, identifying a stable inlet, screening an alignment interval, executing screen mesh alignment, and generating a sampling record. According to the method, stable section calibration is formed by superposing wind speed direction fluctuation and rectifying plate track change, the screening range is locked to an alignment interval in combination with multi-parameter mapping of the rotating speed and the particle density, and the sediment movement state is captured in a layered mode in a deposition layer through a screen; a whole-process sampling sequence is constructed by a collaborative time sequence of rectification action and screen operation, so that real water disturbance characteristics can be dynamically extracted, sediment movement rules can be matched, the sampling trigger response accuracy is improved, and the screening alignment precision under multi-factor coupling is enhanced; the target section is accurately captured under the interlaced interference of the airflow disturbance and the particle settling process, and the particle layered structure is stably kept.

The invention discloses a silty silt seabed critical start calculation method considering seabed liquefaction influence, and belongs to the technical field of silt dynamic simulation and calculation. The method comprises the following steps: firstly, acquiring wave parameters such as wave height, period and water depth, and calculating a characteristic Reynolds number based on a Stokes wave theory; in combination with field observation or indoor test data, the liquefaction grade is calculated through an empirical function, and the bed state is divided; then according to the liquefaction grade, the sediment erosion coefficient and the critical starting stress are corrected in an index form; and finally, correcting empirical coefficients by using field and indoor data, and constructing a regional correction coefficient table. The method can accurately reflect the influence of liquefaction on sediment starting, the accuracy of the calculation result is improved compared with that of a traditional method, the method can adapt to different sea area environments, operation is easy and convenient, and a reliable basis is provided for offshore engineering design and sediment movement prediction.

The invention discloses a salt mine sediment void petroleum and brine migration simulation and parameter optimization evaluation method, which comprises the following steps: obtaining physical characteristic parameters of salt mine sediment, petroleum and brine, the sediment parameters at least comprising void ratio and pore connectivity obtained through CT scanning; calculating an evaluation index based on a simulation result, and performing quantitative evaluation and feasibility screening on the migration process; if the optimal potential exists, parameter optimization and scheme iteration are further executed, and a simulation-evaluation-optimization closed loop is formed; and finally, checking the model through field test data. The method solves the problem that in the prior art, no means for simulating and evaluating the two-phase migration of the petroleum brine in the salt mine sediment gaps exist, the process can be quantitatively simulated, evaluated and optimized, and scientific, accurate and systematic technical support is provided for petroleum storage through the high-impurity salt mine sediment gaps.

The present invention relates to the technical field of sediment or sludge treatment of a water body, and provides a solidification material and a use thereof. The solidification material consists of the following components in percentage by mass: 30% of a sediment flocculant, 20% of a high-strength and high-water-resistant earth consolidator, 30%-40% of calcium bentonite, 5%-15% of a clay mineral, and 5% of an engineering admixture. When the solidification material is used in the sediment or sludge treatment of the water body, pollutants in sediments can be well immobilized, and as tested, no leaching of the pollutants occurs after immersion in the water body. Moreover, the usage amount of the solidification material is significantly reduced compared to that of a conventional solidification material, so that the impact on the storage capacity of the water body can be effectively reduced, and the construction cost is also saved.

The invention discloses a reservoir capacity prediction method considering underlying surface change conditions, and aims to solve the problems that the prediction value of an existing scheme is too large, deviation exists between the estimated reservoir capacity and the actual reservoir capacity, the functions of flood control, water supply, irrigation and the like of a reservoir are affected, and the economic benefits of the reservoir are directly affected. The method comprises the following steps: acquiring actually measured water and sediment series data of a reservoir in historical periods, analyzing the reservoir water and sediment change trend, determining reservoir runoff and reservoir sediment abrupt change points in combination with underlying surface factor changes, dividing different stages of reservoir sediment change, and calculating soil erosion amounts of drainage basins above the reservoir in different stages. And converting the reservoir sand amount in the early stage into the reservoir sand amount under the current underlying surface condition by using the conversion coefficient, estimating the reservoir sand amount in the planning level year or the design level year, and analyzing the reservoir capacity curve in the future. The reservoir capacity prediction method achieves the effects of more accurately predicting the reservoir capacity, exerting the reservoir function, improving the reservoir benefit and avoiding the waste of engineering investment.

The invention discloses a ballasting deviation rectifying construction device for a rectangular pipe gallery in a soft soil stratum and a design method of the ballasting deviation rectifying construction device. The construction device comprises a ballasting device, a lifting device, a horizontal hole digging device and a sediment discharging device. The ballasting device lowers the high position of the pipe gallery through a counterweight measure, the lifting device limits the low position of a pipe joint, the horizontal hole digging device digs soil bodies on the inclined high position and the low side of the pipe gallery, and the silt discharging device transfers and discharges the soil bodies, squeezed into the pipe gallery, on the inclined high position and the low side of the pipe gallery in the ballasting process. The design method comprises correction work of the inclined pipe gallery, ground work arrangement and design checking calculation of a horizontal directional drilling scheme, and has the advantages that the excavation volume is reduced, the construction period is shortened, the water leakage risk is avoided, the construction effect can be ensured to reach an expected target through comprehensive evaluation and careful arrangement of construction devices, and the construction efficiency is improved through a horizontal directional drilling machine. And accurate drilling operation can be carried out according to actual construction requirements.

The invention relates to a hole bottom sediment thickness adaptive direction measurement method for irregular hole shapes. The method comprises the following steps: acquiring hole wall images and vertical distance data in multiple directions; image preprocessing is carried out, hole wall feature points are extracted, three-dimensional coordinates are converted, a dynamic three-dimensional model is fitted, deformation grades are divided, and an inclination angle is determined; preferentially distributing detection points in a serious deformation area, calculating an optimal angle, monitoring by a gyroscope, correcting by an electromagnetic damper, adjusting by a servo motor, and ensuring that an included angle between a probe axis and a hole bottom tangent line is compliant; transmitting multi-frequency ultrasonic waves according to deformation grades, analyzing reflected signals through wavelet transformation, extracting sediment layering characteristics, and calculating the distance from a probe to a layering surface through speed correction; the reference distance is calculated based on the reference coordinates, the sediment total thickness and the dense layer thickness are finally obtained, and the measurement method which is adaptive to hole wall deformation, eliminates interference, dynamically adjusts detection parameters and is accurate in reference positioning can meet the high-precision requirement of engineering for sediment thickness and compactness quantification.

The embodiment of the invention relates to the field of artificial intelligence, and provides a method and a system for automatically collecting fallen leaves and sediments in a swimming pool based on visual identification. The method comprises the steps of obtaining a tree distribution condition around a target swimming pool; dividing the target swimming pool into a plurality of swimming pool grid areas according to the swimming pool structure; predicting a fallen leaf distribution condition in a future preset time period through a fallen leaf distribution prediction model of a space-time diagram neural network in combination with the current weather condition and the tree distribution condition; acquiring multi-modal environment data and people flow state data around the target swimming pool, and predicting a sediment distribution condition in a future preset time period through the sediment prediction hybrid model; according to the fallen leaf distribution condition and the sediment distribution condition, an initial collection task of the target robot is generated for the space structure of the target swimming pool; the initial collection task is dynamically adjusted according to the monitoring image data in the surrounding water area, so that floating objects and sediments temporarily appearing in the surrounding water area are removed, and the cleaning coverage rate and the cleaning efficiency of the swimming pool are improved.

The invention belongs to the technical field of river and lake bottom mud treatment, and particularly relates to a bottom mud dehydration method and device which comprises a treatment tank, a feeding pipe and a liquid injection pipe are arranged at the top end of the treatment tank, and the bottom end of the treatment tank is open; the treatment tank is provided with a precipitation cylinder in sealed connection, the bottom surface of the precipitation cylinder is fixedly connected with a group of fixing plates, and the fixing plates are fixedly connected with the treatment tank through bolts; an auxiliary electromagnet attracts a first gear to enable the first gear to be meshed with a second gear, at the moment, a connecting rod can be controlled to rotate forwards, so that the second gear drives the first gear to rotate, a lead screw can rotate to control a connecting ring to move downwards, and when the connecting ring is in a moving state, an oxidizing agent can be discharged in muddy water in a layered mode; therefore, the sufficient mixing of the oxidant in the bottom mud is improved, and the reaction rate is increased.

This application relates to the field of dredging equipment technology and discloses a dredger cutter head device for dredging underwater sediment-laden hard soil layers. The device includes a linkage sleeve, with a cutter head fixedly mounted at one end of the linkage sleeve. A mud inlet pipe is also mounted on the cutter head, located below the linkage sleeve. Four cutter motors are installed inside the linkage sleeve to drive the cutter head rotation. A gear transmission mechanism is also fixedly installed inside the linkage sleeve. This design with four cutter motors significantly increases the total driving power of the cutter head compared to existing equipment with only one motor, thereby improving cutting efficiency and effectively reducing and preventing phenomena such as "cutter rolling," "cutter running," and "cutter slippage" during the cutting process, achieving effective cutting capability for slab sand.

A method for building a 3D model of a reservoir includes defining a pre-sedimentation model comprising a bottom surface comprising a plurality of cells, and iterating a plurality of deposition modelling steps, including simulating deposition of a layer of sediments on the bottom surface or a previously-deposited layer of sediment, each layer corresponding to a determined period of time of sedimentation and comprising a plurality of cells, and computing petrophysical parameters associated to at least a cell of the generated layer. Simulating deposition of a layer of sediments includes introducing a plurality of particles within the model, simulating transport of the particles comprising moving a particle from one cell to another or depositing the particle, and generating a layer comprising a plurality of cells, each cell associated to a thickness of deposited particles. The petrophysical parameters are computed from mineral elements and sizes of the particles deposited in each cell.

The application discloses a rubber dam dynamic boundary simulation method and system based on a two-dimensional water-sediment dynamics model, relates to the technical field of water conservancy engineering numerical simulation and scheduling, and comprises the following steps: defining the internal interface and the virtual dam top elevation of the rubber dam; deciding the target state based on multi-element water-sediment data; smoothly adjusting the dam top height; in the flux calculation of the finite volume method, first, rotating the state quantity to the local coordinate system, comparing the water level with the dam top elevation and correcting the state variable: when the water level is lower than the dam top, the normal velocity is forced to be zero to simulate water retaining, and when the water level is higher than the dam top, the effective water depth and the sediment discharge are calculated based on the dam top; after solving the one-dimensional Riemann problem, the global flux is obtained by inverse rotation. The application realizes the continuous and automatic simulation of the rubber dam state without changing the terrain, and solves the problems of mass non-conservation and numerical instability of the traditional method.

The invention provides a device and a method for testing a local scouring model below a pipeline. The device comprises an organic glass plate cuboid model box, a cover plate, a limiting plate, a rubber ring, the pipeline, a side baffle, a water tank A, a water tank B, a deposition tank, a balance, a computer and a camera. Through collaborative design of a limiting plate and a cover plate, water flow only acts on a contact interface between the lower portion of the pipeline and a soil layer, disturbance of an upper streaming vortex-induced effect is effectively avoided, and precise simulation of local scouring below the pipeline is achieved; a water flow pipe winding phenomenon, a sediment migration and deposition process and pit flushing time evolution are observed in real time by virtue of a camera, and an evolution process of initial micro-pit formation, pit body expansion, gap generation, gap extension and pit flushing form stability is completely captured in combination with quantitative weighing of a balance and a computer; and accurate test data and theoretical support are provided for the anti-scouring design of the pipeline foundation.