161 results about "Sand sample" patented technology

The invention relates to the technical field of quartz sand detection, in particular to a quartz sand impurity detection method which comprises the following steps: acquiring spectral data of a quartz sand sample, and obtaining spectral line interference degrees of characteristic peaks according to energy distribution conditions of the characteristic peaks of the spectral data; based on the peak shape variation condition of each characteristic peak and the offset condition of each characteristic peak and a matrix characteristic peak, the matrix interference degree of each characteristic peak is obtained, and the interference intensity of each characteristic peak is obtained by combining the anti-interference degree of each characteristic peak so as to optimize the chaos regulation factor when the chaos mapping population is initialized; and finally, combining with an optimization algorithm to obtain a characteristic wave band with minimum interference, and detecting the purity and impurity content of the quartz sand based on the characteristic wave band. The quartz sand impurity detection precision can be improved.

The invention provides a method for measuring the object positions of gold ores above the medium fraction in heavy sand and application of the method, and belongs to the field of mineral processing.The method for measuring the object positions of the gold ores above the medium fraction in the heavy sand comprises the following steps that gold ores above the medium fraction in a heavy sand sample to be measured are selected, and the length, width and thickness of each gold ore are measured; calculating the observation volume of each gold mineral; a volume correction coefficient and color are introduced to calculate the mass of each gold mineral; and calculating the grade of the gold minerals above the medium grade. According to the method, the observed volume of the gold mineral is corrected by introducing the volume correction coefficient, so that the real volume closer to the reality is obtained, the density of the gold mineral is corrected through color formation, so that the real density closer to the reality is obtained, and the mass of the gold mineral obtained through volume and density calculation is more accurate; therefore, the calculated grade is more accurate.

The invention belongs to the technical field of quartz sand, and particularly relates to a method for evaluating quartz sand for producing a bubble-free quartz crucible and a product thereof, a plurality of samples are taken from a batch of quartz sand to be used, the transparency of the quartz sand samples is detected in a normal temperature state, and if the proportion of the quartz sand samples with the transparency less than 75% is less than or equal to 5%, the quartz sand samples with the transparency less than 75% are judged to be the quartz sand samples with the transparency less than 75%. If the pH value is less than 5, pores, cracks and the like are generated in the crucible or on the surface of the crucible to influence the service life and the performance of the crucible, and if the pH value is greater than or equal to 5 and less than or equal to 7, the transparency of the quartz sand sample after high-temperature heating is detected, and the transparency of the quartz sand sample after high-temperature heating is determined to be less than or equal to 7. As the negative characteristic of the quartz sand after high-temperature heating appears, if the proportion of the quartz sand with the transparency less than 75% of the heated quartz sand sample is less than or equal to 5%, the evaluated quartz sand is obtained, and the quartz crucible produced by using the evaluated quartz sand is free of bubbles, relatively high in quality and long in service life.

The invention provides a judgment reagent and a judgment method for flocculant residues in washed sand. The judgment reagent comprises the following components in parts by mass: 2-10 parts of a masking agent, 3-6 parts of activated carbon, 15-30 parts of a buffer solution, 1-5 parts of a chromogenic reagent and 30-60 parts of a competitive reaction solution, the judgment method comprises the following steps: taking a sand washing sample, adding water, stirring, sequentially adding the masking agent, the activated carbon, the buffer solution, the color developing reagent and the competitive reaction solution, and judging the flocculant residue by observing whether precipitate is generated or the color is changed. The device has the advantages of rapidness, portability, economy and easiness in operation, and is suitable for field use.

The invention provides a detection method for rapidly judging flocculant residues in washed sand, and belongs to the technical field of scientific detection of building materials. The detection method comprises the following steps: taking a to-be-detected sand sample, washing off particles less than 0.075 mm, adding water into the residual sand sample, stirring to obtain a sand suspension, determining the time T1 when the turbidity value is 50NTU, taking another to-be-detected sand sample, putting the to-be-detected sand sample into water, stirring to obtain a to-be-detected sand suspension, determining the time T2 when the turbidity value is 50NTU, when T2 is less than or equal to 0.8 T1, determining that the flocculant residue in the to-be-detected sand sample is excessive, and when T2 is less than or equal to 0.8 T1, determining that the flocculant residue in the to-be-detected sand sample is less than or equal to 0.075 mm. The raw materials cannot be used in concrete preparation; and when T2 is greater than 0.8 T1, determining that the flocculant residue in the to-be-detected sand sample is less, and the to-be-detected sand sample can be used as a raw material in concrete preparation. From the perspective of time saving and convenience, the provided detection method is simple and reliable.

The invention relates to the technical field of earthquake gravel testing, and discloses a sandy soil reliquefaction characteristic testing device and a testing method thereof.The sandy soil reliquefaction characteristic testing device comprises a vibration table, a box body, a compression assembly, a detection assembly, a development assembly and a computer unit; the box body is arranged above the vibration table, the box body is made of a transparent material, the box body is connected with the vibration table, and a saturated sand sample is arranged in the box body; the compression assembly is arranged in the box body, and the compression assembly is located above the saturated sand sample; the detection assembly is arranged in the box body and used for monitoring liquefaction of the saturated sand sample, and the detection assembly comprises a pore water pressure sensor arranged in the saturated sand sample; the developing assembly is arranged outside the box body; the computer unit is electrically connected with the detection assembly and the imaging assembly. According to the invention, through a technical closed loop of cyclic loading control-mesoscopic imaging-data synchronous analysis, full-period and multi-scale observation of the reliquefaction characteristic of the sandy soil under the action of repeated earthquakes is realized.

The invention discloses a device for simulating migration of pollutants under mining and tidal conditions. The device comprises an aquifer loading tank, a pollution tank simulation pollution source and a plastic pipe simulation pumping well are arranged in the tank; the left side and the right side of the aquifer loading groove are divided into a salt water chamber and a fresh water chamber by acrylic plates with seepage holes; the same constant water head device is arranged in the salt-fresh water chamber; and a tide device is arranged on the salt water chamber to simulate the tidal effect of seawater. The positions of the pollution tank and the pumping well are not fixed and can be adjusted; a plurality of salinity concentration monitoring devices are arranged on the rear side of the aquifer loading groove; the inhomogeneous medium of the coastal zone aquifer is simulated by filling the aquifer loading groove with sand samples in a layered manner, so that seawater invasion is simulated. The device can simulate the migration of pollutants in the aquifer under different tide conditions and exploitation conditions, monitor the concentration change of the pollutants and the water pressure change of each part in the horizontal direction in real time, and can simulate the migration situation of the pollutants under the combined action of tide coupling underground water exploitation.

The invention relates to a method for detecting pollutants in high-purity quartz sand and a related device, and belongs to the technical field of image recognizing.The method for detecting the pollutants in the high-purity quartz sand comprises the steps that feature extraction is conducted on obtained sand sample images of the high-purity quartz sand to be detected, and multiple sand sample feature images are obtained; performing feature analysis on each sand sample feature image, and determining the probability of the category to which each pixel point in the sand sample feature image belongs; and determining the category of each pixel point based on the probability of the category of each pixel point in each sand sample feature image, and determining the pollutant level of the to-be-detected high-purity quartz sand based on the category of each pixel point. According to the method, pollutants in the sand sample image can be accurately identified through an image identification technology, chemical treatment on the to-be-detected high-purity quartz sand is not needed, and detection of the pollutants in the high-purity quartz sand is more convenient and quicker.

The invention discloses a microorganism solidification inclined deposition surface sandy soil hollow cylinder sample preparation device and a use method. The sample preparation device comprises a hollow cylinder mold and a supporting pedestal for the hollow cylinder mold to rotate. One end of the hollow cylindrical mold can be lifted to a proper angle through a supporting rod with threads and a U-shaped hoop which are arranged on a supporting pedestal, so that a deposition surface inclined at any angle of a sample is vertical to the ground; a peristaltic pump is connected with a grouting channel distributed on the inner cylinder, and grout is input into the hollow cylindrical sample. Slurry can flow along the deposition surface under the action of gravity, the phenomenon that microorganisms are preferentially attached to the area close to the grouting hole is weakened while the grouting efficiency is improved, disturbance of slurry flowing to the inclined deposition surface of the sample is reduced, and the problems that a traditional grouting method is low in efficiency and large in disturbance to the sandy soil sample on the inclined deposition surface are solved. Therefore, the stability of the inclined deposition surface of the sample is ensured, and the preparation quality and test result reliability of the microorganism solidification inclined deposition surface sample are improved.

The utility model relates to the technical field of continuous sand collection detection, and particularly discloses a continuous sand dust collection detector which comprises a collection assembly, a detection storage assembly and a base mounting assembly which are mechanically connected in sequence from top to bottom, the collecting assembly, the flow guiding assembly, the connecting assembly and the detecting and storing assembly are sequentially connected through pipelines. The flow guide assembly and the detection and storage assembly respectively comprise a suction fan for flow guide to form a double flow guide structure; wherein the collecting assembly used for alternately collecting sand is of a drum type structure, a rolling body of the collecting assembly is formed by connecting n semi-closed independent cavity structures, and each independent cavity structure is provided with a dust inlet matched with an air inlet formed in a drum shell of the collecting assembly for use. According to the utility model, through a sampling mode that the motor is driven to rotate a plurality of collecting boxes, a multiple-time, small-amount and continuous sampling method is realized, so that the accuracy of a later sand and dust sample is ensured, and meanwhile, through the arrangement of a double flow guide structure, the collection loss is less, the error is smaller, and the result is more accurate.

The invention provides a method for determining the content of multiple components in stuffing sand, which comprises the following steps of: performing component analysis on the stuffing sand by adopting a mode of combining melting sample preparation and X-ray fluorescence method fuse piece analysis, fitting a standard sample piece correction working curve, performing repeatability and reproducibility tests, determining the applicability of the method, and determining the content of multiple components in the stuffing sand. And performing component analysis on the to-be-detected stuffing sand sample wafer by using an X-ray fluorescence method to obtain the stuffing sand sample wafer. According to the present invention, the component analysis is performed on the stuffing sand by combining the melting sample preparation and the X-ray fluorescence method fuse piece analysis, such that the contents of chromium sesquioxide, silicon dioxide, iron sesquioxide, aluminum oxide, zirconium dioxide and other substances in the stuffing sand can be obtained at the one time, and the determination method improves the detection efficiency, and has characteristics of high sensitivity and high accuracy. Fuse piece analysis does not relate to improvement of the particle effect problem in tabletting analysis, and the accuracy is high.

The invention discloses a sediment starting flow velocity measuring device based on trapezoidal groove distribution characteristics, and belongs to the field of sediment starting flow velocity measurement. The device comprises a trapezoidal groove, a guide rail, a laser section plotter, a point type current meter and an annular water tank, the trapezoid-shaped groove is erected in an annular water tank test area, a guide rail is erected on the side wall of the water tank, and the laser section plotter and the point type current meter are erected above the trapezoid-shaped groove through the guide rail and can move through the guide rail; water flow enters from the wide end of the trapezoid-shaped groove and flows towards the narrow end, and the flow speed is gradually increased along with gradual decreasing of the groove width. A test sand sample is laid in the trapezoid-shaped groove, the elevation change of the sand sample is monitored through a laser section plotter, an elevation mutation feature point is a feature mutation point for converting static sediment into starting sediment, and the starting flow velocity of the sand sample can be obtained by obtaining the typical flow velocity of the feature point through a point type flow velocity meter.

The invention discloses a multispectral photoelectric sand meter signal fusion and sand content calculation method and system. The method comprises the following steps: collecting multiple groups of different sand contents, photoelectric signal data of a multispectral photoelectric sand meter, corresponding sand content data, temperature data and water depth data; preprocessing the original photoelectric signal; performing feature extraction on the curve of each column of processed signal values changing along with the sand content; performing curve fusion; an improved particle swarm optimization algorithm is adopted to automatically optimize the positions of segment points and the polynomial order of fitting of each segment, and the function relation between the fusion value of each curve signal and the sand content in the standard environment is subjected to segment fitting; in a field test environment, temperature and water depth compensation is carried out on the signal values, and a sand content value corresponding to the test sand sample is reversely solved by utilizing different signal data based on a function relationship; sand content data is manually measured by combining with a field sand sample, and a sand content result of the sand meter is dynamically corrected by scattering reference light of different wavebands. According to the invention, rapid output and correction of the sand content of the to-be-measured liquid can be realized.

The invention discloses a small annular water tank for a sediment starting flow velocity test and an arrangement method thereof, and belongs to the field of sediment starting flow velocity measurement, the water tank comprises an annular water tank, the annular water tank is provided with a closed flow path, and a water flow pushing paddle plate and a test sand sample are arranged in the flow path; the water flow pushing paddle plate is used for providing power for water in the flowing path, the annular water tank is connected with a pressurizing device, and a laser turbidity meter and a pressure flow velocity sensor are further arranged in the flowing path. The device is convenient to operate, assemble and disassemble, stable and advective hydrodynamic force can be quickly formed, and an efficient, easy-to-operate and easy-to-clean environment is provided for a sediment starting flow velocity test.

The invention provides a method for positioning the same particle before and after gold leaching, and belongs to the technical field of particle positioning analysis. According to the method, the heavy sand sample is obtained through manual reselection; removing sulfide to obtain a gold mineral monomer; uniformly mixing the resin 1, the curing agent 1, gangue mineral particles and different pigments, and respectively adding the mixture into grinding tools with different shapes; after the resin is cured, gold minerals are selected to be placed in molds of different shapes; and uniformly mixing the resin 2 and the curing agent 2, adding the mixture into a mold, grinding and polishing to obtain exposed gold mineral monomer particles, and observing the surface phenomena before and after gold leaching under a stereomicroscope and a scanning electron microscope through different colors and shapes respectively for experimental research on the gold leaching effect of the gold leaching agent. According to the method, gangue mineral particles with different colors are introduced into the resin, so that the same gold mineral can be found more quickly after each test, the phenomena presented before and after leaching of the gold mineral are detected, and the method has guiding significance on experimental research of the gold leaching agent.

The invention relates to the related technical field of sand sample drying treatment equipment, and discloses geological exploration sand sample screening treatment equipment which comprises a sand sample treatment rack, a treatment carrying groove is formed in the right side of the sand sample treatment rack, a screening drying mechanism is rotationally installed on the upper side of the treatment carrying groove, and the screening drying mechanism comprises a screening drying box. A box body end cover is rotatably mounted at the top of the screening drying box, a screening drying cavity is formed in the screening drying box, a heat insulation carrying layer is fixedly mounted on the inner wall of the screening drying cavity in an embedded mode, and a drying control mechanism, a drying treatment mechanism and a screening treatment mechanism are mounted in the screening drying cavity from bottom to top; according to the geological exploration sand sample screening treatment equipment, efficient screening treatment and feeding for drying treatment can be achieved, and meanwhile the more efficient sand sample drying function can be achieved.

The invention discloses a heterogeneous water-containing medium physical model construction and verification method, and belongs to the technical field of underground water flow and pollutant transport rules. The method comprises the steps of setting a simulation model; sand samples are collected on site for permeability coefficient determination, and a mean value and a variance are calculated; generating a gridding permeability coefficient field based on a direct Fourier transform algorithm; accurately filling quartz sand in a simulation device according to the parameter field to form an initial physical model; a three-in-one verification system of physical experiment-ERT in-situ monitoring-numerical simulation is adopted for verification and correction, and finally a physical model capable of truly reproducing field heterogeneous characteristics is constructed. Compared with a traditional method adopting a simple lenticular body to approximate heterogeneity, the method is more suitable for the space variability of the actual underground water-containing medium. According to the three-in-one verification system provided by the invention, multi-dimensional verification of model precision is realized, and a new technical normal form is provided for research on a migration mechanism of pollutants in a heterogeneous medium.

The invention provides a multi-temporal-spatial-scale river sediment tracing method, and relates to the field of geomorphology and river dynamics. According to the method, light release light (OLS) samples of terraces and floodplains and zircon sand samples of corresponding layers are collected on the sections of a source (branch) and a sink (main stream), and different age sequences are divided in combination with contemporary zircon sand samples of a tender beach; the contribution rate of a source to a sink is directly calculated by using a zircon age spectrum matrix, and a quality contribution rate algorithm is optimized in combination with a zircon mass percentage. According to the method, contemporary and historical multi-time-scale sediment traceability is realized, the traditional fitting simulation process is simplified, the calculation efficiency and accuracy are improved, and the method is suitable for sediment source analysis in areas poor in data.

The invention relates to the technical field of bed sand sample collection, and discloses a riverbed sand sample collection method, which comprises the following steps: connecting a rope with a connector, lifting the rope to keep a sand excavation cylinder in a longitudinal arrangement state, enabling the sand excavation cylinder to fall into a water body from top to bottom, and enabling the water body to enter a sand excavation cavity through a water permeable hole until the whole sand excavation cylinder is submerged into the water body; the sand excavation cavity is filled with water; the sand excavation barrel continues to be put down in the water body until the bottom plate abuts against the riverbed, then the rope is put down by a set length so that the sand excavation barrel can fall down to be in a horizontal shape, and the two balance weight levers can automatically rotate and be adjusted so that the two balance weight levers can abut against the riverbed; after the sand excavation barrel is kept standing in a horizontal state for a set time, the rope is pulled to drive the sand excavation barrel to move, the sand excavation opening is downwards and obliquely inserted under the balance weight effect of the balance weight rod, and sand on a riverbed enters the sand excavation cavity through the sand excavation opening; after the sand excavation cylinder is pulled by the rope to move by a set distance, the rope is lifted to lift the sand excavation cylinder out of the water body, and sand sample collection is completed.

The invention relates to a classification method of fully strong weathered granite. The method is suitable for the technical fields of solid waste utilization and ore processing. The technical problem to be solved by the invention is to provide the classification method for the fully strong weathered granite. According to the technical scheme, the classification method for the fully strong weathered granite comprises the steps that the washing difficulty index of a granite sample is determined based on the clay mineral content and the elutriation rate of the granite sample; determining a harmful substance content index of the granite sample based on the harmful substance content of the granite sample; determining the product quality index of the granite sample based on the crushing values of the sand samples of multiple particle sizes screened from the granite sample; based on the washing difficulty index, the harmful substance content index and the product quality index of the granite sample, classifying the granite sample in combination with a preset sample classification rule; and based on granite sample classification, in combination with a preset classification process suggestion library, determining a process suggestion for the granite sample.

The invention discloses a method for simulating a water-sand vertical leakage damage process of an underground diaphragm wall support foundation pit, which comprises the following steps of: embedding a defect clamping plate into a transparent water outlet pipe, loading sand samples into a transparent experiment box in a layered manner, tamping in a layered manner, mounting a pore pressure meter, and calculating a critical water head difference of each layer of sand samples after the sand samples are saturated and solidified; starting a simulation experiment, obtaining experimental data and water-sand leakage quality of a pore pressure meter, and judging a leakage damage state of each layer of sand sample; calculating the extra unborne water head difference and the actually measured leakage damage thickness of the critical layer sand sample, and further obtaining time-varying data of the total leakage height of the sand layer in the simulation process; and establishing a time-varying graph of the pore water pressure, the water sand leakage quality and the total leakage height of the sand layer by adopting a visual tool. According to the simulation method established by the invention, the simulation and data visualization of the leakage process can be realized, the water-sand vertical leakage failure law and failure time can be explored, the complexity of actual leakage can be reflected, and the development of research type and teaching type experiments is facilitated.

The application discloses a kind of foam fluid inhibits soil body permeability damage test device and its test method, the device includes main structure, variable head control unit, pore pressure monitoring unit, computer analysis unit, foam fluid injection unit, foam fluid injection unit includes liquid input module, gas input module, foam generator, liquid input module and gas input module are connected with foam generator, and foam generator output end is connected with main structure;The test method includes assembling device, fills sand sample in sand tank, and carries out test by injecting foam fluid into sand tank;Water head is promoted gradually, and after seepage is stabilized, next stage water head test is carried out, and the change process of the permeability damage area of sand sample top surface and the change of foam fluid occurrence range are recorded, and pore pressure monitoring unit is used to monitor the pore pressure in sand sample in real time, when permeability damage area and water inlet chamber are connected, stop test.The application can be used to verify and evaluate the effect of foam fluid inhibiting soil body permeability damage.

The invention discloses a liquid pulse type water area sand source investigation device and method, and belongs to the field of water engineering sand source investigation. The device comprises a hull structure, a supporting structure, a pipeline structure, a drilling structure and a control system, the drilling structure is driven by multiple strands of independent water flow pulses to vertically penetrate into a sand layer, and an integrated sensor collects sand source mechanical parameters (end resistance, side resistance and pore water pressure) in real time and synchronously recovers a sand sample. The computer control center dynamically adjusts the water flow pulse pressure by collecting drilling structure perpendicularity parameters in real time through the integrated sensor, drilling perpendicularity closed-loop control is achieved, and sand source investigation can be completed without casing running. The problems that traditional drilling depends on a sleeve, an operation window is narrow and labor cost is high are solved, and the method has the advantages of accurate positioning, efficient operation and digital intelligent control and is suitable for various water area sand source investigation scenes.

The present invention discloses a dynamic seepage device and method under impact load, the device comprises a loading device, a device body, and a water supply system, wherein the loading device is arranged in the device body, and the water supply system is connected to the device body. The present invention aims at solving the technical requirements of how to solve the current problem of sand liquefaction, which is completed under vibration load or large shear displacement conditions, and most of the studies maintain an undrained state, and rarely consider the liquefaction response of the bottom of saturated sand after being impacted. A dynamic seepage device and method under impact load are proposed, which can better observe the sand sample changes and liquefaction response of the sand when the bottom is impacted, and analyze the changes in the speed of seepage under dynamic load by recording data through sensors. The present invention can observe the sand sample changes and its liquefaction response when the bottom is impacted, and can also observe the changes in the speed of seepage under different dynamic loads.

The invention relates to the technical field of experimental equipment, in particular to equipment for preparing sandy soil samples with different water contents, which comprises a compression rod device, a sealing cylinder assembly and a pressurizing device, a cylindrical sealing cavity is formed in the sealing barrel, the sealing film and the sealing cavity are coaxially arranged, an annular confining pressure cavity is formed between the sealing film and the inner circumferential wall of the sealing cavity, a confining pressure assembly communicated with the confining pressure cavity is arranged on the outer circumferential wall of the sealing barrel, and the confining pressure assembly is used for introducing pressure liquid into the confining pressure cavity; the compression rod device comprises an upper compression rod and a lower compression rod, the compression rod device further comprises a water injection assembly communicated with the sample cavity, the water injection assembly can inject liquid into the sample cavity, and the pressurizing device is used for pushing at least one of the upper compression rod and the lower compression rod to be close to the other one. Therefore, the problems that the operation is complicated in the process of sand samples with different water contents and the water contents of the samples are reduced in the process of transferring the manufactured samples to experimental equipment are solved.

The invention relates to a machine-made sand online detection system, and belongs to the technical field of concrete detection, the machine-made sand online detection system comprises a sampling module, a weighing module, a screening and drying module, an image acquisition module and an analysis module, the sampling module is used for taking a machine-made sand sample from a production line and sequentially putting the sample into the weighing module and the screening and drying module; the screening and drying module comprises a dispersing pipe, an air blower, a heating machine and a screening channel, the air blower is used for supplying air pressure in the radial direction of the dispersing pipe, the heating machine is used for heating the dispersing pipe and the air blower, and the screening channel is arranged on the other side, located on the air blower, of the dispersing pipe; the air blower is used for blowing dust in the dispersion pipe into the screening channel, and the air blower is used for being matched with the heating machine to dry a sample in the dispersion pipe; the method has the advantage of being high in efficiency.

The utility model discloses a sand sample screening machine which comprises a bottom frame, screening assemblies are arranged on the top of the bottom frame, auxiliary assemblies are arranged between the screening assemblies, outer side plates are fixedly installed on the outer side of the bottom frame, supporting columns are fixedly installed between the upper outer side plate and the lower outer side plate, and each screening assembly comprises a screen and a bottom plate. The outer sides of the limiting rods are connected with racks in a sliding mode, and connecting blocks are fixedly installed between the racks and the corresponding outer buckets. According to the sand sample screening machine, front-back movement of a rack can be achieved through cooperation of reciprocating rotation of a gear and a limiting rod, front-back reciprocating movement of a screen is achieved through front-back movement of the rack, and sand above the screen can be screened through front-back reciprocating movement of the screen; and the sandy soil can be subjected to multi-stage classified screening through a plurality of screen meshes of which the apertures are sequentially reduced up and down, so that the purposes of convenience and higher efficiency of classified screening are achieved.

This invention discloses a measurement system and method suitable for measuring the sand-fixing capacity of vegetation roots in the field, comprising: a sample lifting device, a field module, a measurement module, a sand sample crushing device, and an integrated control system. This invention can simultaneously achieve real-time and high-precision monitoring of data such as sand content and flow velocity during experiments. It quantifies and analyzes the sand-fixing capacity of vegetation roots through parameters such as soil erosion rate and critical initiation velocity of soil sediment, making it particularly suitable for determining the sand-fixing capacity of vegetation roots in coastal areas.

The invention discloses a device for evaluating the reaction activity of sulfur-containing tailing sand, which comprises a reaction container, a heater, a humidifier and a control and data acquisition system, the reaction container is provided with a gas inlet and a gas outlet and is used for outputting and feeding composite gas of oxygen and nitrogen into the reaction container, and a tray for placing a sulfur-containing tailing sand sample is arranged in the reaction container. The heater is used for controlling the temperature in the reaction container, the humidifier is used for controlling the humidity in the reaction container, and the reaction container is provided with an oxygen sensor, a humidity sensor and a temperature sensor which are used for dynamically collecting the oxygen content, the temperature and the humidity in the reaction container respectively; and the heater, the humidifier, the oxygen sensor, the humidity sensor and the temperature sensor are respectively connected with the control and data acquisition system. The invention further discloses a method for evaluating the reaction activity of the sulfur-containing tailing sand, the reaction activity of the sulfur-containing tailing sand can be evaluated by measuring the oxygen consumption of the sulfur-containing tailing sand by adopting the device, the test is convenient, and the method can be suitable for environments with different temperatures and humidity.

The utility model relates to artificial sand mud content detection technical field, and disclose a kind of artificial sand mud content detection device, including machine body, and for containing sand sample beaker, still include: rotation connection on the stirring shaft of machine body, hollow formation water inlet channel in stirring shaft inside, the side wall of bottom is equipped with the water outlet hole of intercommunication water inlet channel;Lifting connection on the base of machine body, for driving beaker to stirring shaft close or away;At least one water suction pipe, fixedly connected on the machine body, water suction pipe bottom extends into beaker, and water suction pipe water inlet end detachably connected with filter screen, filter screen is located in the side of water outlet hole;The utility model is through lifting base to facilitate beaker to dismount, hollow stirring shaft water injection cooperation side filter screen, utilize water flow scouring anti-blocking, ensure that drainage is smooth, and integrated water supply and water suction component realize automatic elutriation, replace manual operation, significantly improve detection efficiency and result accuracy, satisfy large quantities engineering detection demand.