79 results about "Sand sample" patented technology

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 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 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 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 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.

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 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.

The invention discloses a traceability analysis system for a river sediment source in a cold highland area, and belongs to the technical field of sediment traceability. Comprising a data acquisition module, a sediment fingerprint database building module, a source region identification model building module, a sediment source inversion module, a space-time thermodynamic diagram generation module and a visual display module. And the sediment source inversion module is used for carrying out source contribution rate inversion on sediment samples collected by the target river section, the inversion method adopts a non-negative least square method, the feature vectors of the target samples are fitted on the feature vectors of all the source areas in the fingerprint database, and the contribution proportion of each source area to the samples is calculated. The method does not depend on initial artificial point distribution or physical marking of a field source area, a source area fingerprint database is constructed based on natural fingerprint characteristics of sediment, a passive, non-interference and traceable traceability identification mode is achieved, and the method is suitable for application requirements under extreme terrains and seasonal freeze-up restrictions in cold and cold mountainous areas.

The utility model discloses a division device for building sand samples, which relates to the technical field of building sand tests and comprises a fixing shaft, a cylinder rotatably connected to the outer side of the fixing shaft, a rotating handle fixedly connected to the outer wall of the cylinder, a plurality of sand outlet doors fixedly mounted on the bottom surface of the cylinder, and a first clamping groove, a second clamping groove and a third clamping groove sequentially formed in the inner surfaces of the sand outlet doors. The clamping groove I, the clamping groove II and the clamping groove III are respectively and correspondingly clamped with a circular baffle I, a circular baffle II and a circular baffle III, and the tops of the cylinder, the circular baffle I, the circular baffle II and the circular baffle III are respectively clamped with a divider I, a divider II, a divider III and a divider IV which are used for dividing a sand sample into equal parts. According to the utility model, simple and repeated manual division is replaced by a mechanical device, so that the workload and the labor intensity of testers can be reduced; in addition, the working efficiency of sand sample division and the precision of a sand sample division test can be improved.

The present application relates to experimental equipment technical field, specifically, it is different to prepare equipment of sand sample of moisture content, including: compression rod device, sealing cylinder subassembly and pressurizing device, the sealing cavity of cylindrical is arranged in the sealing cylinder, the sealing membrane is arranged coaxially with the sealing cavity, and the annular surrounding pressure cavity is arranged between the inner peripheral wall of the sealing cavity, the outer peripheral wall of the sealing cylinder is provided with the surrounding pressure subassembly that communicates with the surrounding pressure cavity, and the surrounding pressure subassembly is used to pass into the pressure liquid in the surrounding pressure cavity, the compression rod device includes upper compression rod and lower compression rod, and the compression rod device further includes the water injection assembly that communicates with the sample cavity, the water injection assembly can inject liquid into the sample cavity, and the pressurizing device is used to push at least one of upper compression rod and lower compression rod to another close to each other, so as to solve the problem that the moisture content of sample decreases in the process of different moisture content sand sample and the process of transferring the sample prepared to the experimental equipment.

The utility model discloses a calcareous sand saturation device for a triaxial test, and relates to the technical field of indoor geotechnical tests of geotechnical engineering. The device comprises a supporting sample bearing structure, a sealing sample preparation structure, a hydraulic pneumatic structure and a gas-liquid supply structure. The supporting sample bearing structure consists of a base, a sliding rod, an upper sliding table, a lower sliding table and a top table; the sealed sample preparation structure comprises a sealing assembly and a sample preparation assembly; the hydraulic pneumatic structure comprises a hydraulic assembly and a pneumatic assembly and is used for controlling lifting of the sliding table and pressure maintaining and air exhausting of the sealing assembly. The gas-liquid supply structure provides CO2 gas and gas-free water for sample saturation and discharges redundant gas and liquid. According to the utility model, through the lifting type sealing assembly structure and the stepped sealing design, and the sequential action of the negative pressure pump, carbon dioxide gas and gas-free water, air in a calcareous sand sample is effectively discharged, a highly saturated state is quickly achieved, the accuracy of a subsequent triaxial test result is remarkably improved, and the test efficiency is improved. The sealing performance is excellent, the operation is simple, and the structure is stable.

According to the automatic detection unmanned experimental device for sand, various sand sample detection devices are integrated in the portable container, and the ground rail robot is combined to realize the linkage operation of automatic transmission and multi-item detection of samples, so that the automation level and the working efficiency of detection are greatly improved, and the dependence on manual operation is reduced. And meanwhile, the code scanner is combined with the man-machine interaction system, so that sample information is quickly and accurately input, and the traceability of detection data and the standardization of management are ensured. The whole equipment is compact in structure, convenient to transport and deploy on site, and particularly suitable for rapid detection of sand samples in complex environments such as construction sites or fields, and the technical problems that traditional sand sample detection equipment is tedious in operation, low in efficiency and difficult to realize on-site detection are effectively solved.

The utility model relates to the technical field of experiment simulation devices, and discloses an electric field coupling type multi-well interference simulation experiment table which comprises a machine body, heat dissipation mechanisms are installed on the front side and the rear side of the inner wall of the machine body, the heat dissipation mechanisms are used for blowing air to dissipate heat of components in the machine body, and a compaction mechanism is installed in the middle of the top wall of the machine body. The compaction mechanism is used for compacting a detected sandy soil sample, and the guide mechanisms are mounted on the front side and the rear side of the interior of the machine body and used for guiding; the heat dissipation mechanism comprises a square block, and the square block is installed on the front side of the inner wall of the machine body. According to the utility model, the square block circularly moves along with the movement of the belt, so that the fan covers a wider area, the heat dissipation effect is improved, and the problems that the existing fan can only dissipate heat in the equipment in a single direction and cannot synchronously blow air to cool parts at different positions in the equipment, and the cooling effect is poor are solved. And high-temperature damage to the equipment is further caused.

This utility model provides a fully automatic cuttings sampling and cleaning device for oil logging, relating to the technical field of oil logging sampling and cleaning devices. It includes a housing, inside which a cleaning mechanism is installed. The cleaning mechanism includes several limiting cylinders, each containing the interior of the housing. Two auxiliary bearings are fixedly connected to the inner wall of each limiting cylinder. A rotating cylinder is located inside each limiting cylinder, with the inner wall of the inner ring of each auxiliary bearing fixedly connected to the outer surface of the rotating cylinder. A cleaning cylinder is located inside each rotating cylinder, and several arc-shaped cleaning frames are fixedly connected to the inner wall of each cleaning cylinder. A spiral frame is also located inside each cleaning cylinder. This fully automatic cuttings sampling and cleaning device for oil logging enables better cleaning of cuttings and sand samples during use, ensuring effective cleaning and increasing the accuracy of subsequent cuttings and sand sample testing data.

The application relates to the technical field of ground material analysis methods, and discloses a sand vibration liquefaction simulation device and a testing method thereof, which comprises a box body for placing a sand sample, and an opening is formed in the upper surface of the box body; a counterweight mechanism is arranged on the upper surface of the sand sample in the box body, the counterweight mechanism covers the upper surface of the sand sample, is used for applying pressure to the sand sample, and a plurality of drainage holes are formed in the counterweight mechanism; a vibration mechanism connected with the box body is arranged below the box body and is used for vibrating the box body to simulate sand vibration conditions; a pressure sensor, a laser range finder and an acceleration sensor are further arranged and are used for measuring test parameters of the sand sample in real time; constant load can be provided in the sand liquefaction simulation process; the counterweight mechanism is provided with the drainage holes, water in the saturated sand sample is discharged through the drainage holes when the counterweight mechanism applies pressure, stress borne by the sand sample can all be regarded as effective stress, and test conditions of the sand sample are more in line with actual situations.

The present invention discloses a device for detecting the mica content in manufactured sand based on multi-light source imaging. The device comprises: a darkroom, a vibrating feeder, a first light source, a second light source, an image acquisition device, and a processing terminal. The vibrating feeder, the first light source, the second light source, and the image acquisition device are respectively connected to the processing terminal. The vibrating feeder is disposed on one side of the darkroom and is used to receive and convey manufactured sand samples and control the uniform drop of the manufactured sand samples. The first light source and the second light source are both disposed on one side of the darkroom and below the vibrating feeder, providing illumination for the falling path of the manufactured sand samples. The image acquisition device is disposed between the first and second light sources and is used to capture images of the falling manufactured sand samples. The processing terminal is used to control the operating states of the vibrating feeder, the first light source, the second light source, and the image acquisition device, and to receive and process the captured images. The device is capable of quickly and accurately detecting the mica content in manufactured sand.

The invention provides a method for rapidly detecting the mud content of artificial sand based on a current value and application, and belongs to the technical field of sand detection. The detection method comprises the following steps: adding an artificial sand sample and water into an electrolytic tank, stirring, standing to obtain a turbid liquid, connecting a cathode and an anode of the electrolytic tank, measuring a current value of the turbid liquid, substituting the current value into a standard curve equation taking the mud content of the artificial sand as an abscissa and the current value as an ordinate, and calculating the mud content of the artificial sand. And calculating to obtain the mud content of the artificial sand sample. Meanwhile, the invention further comprises application of the method in evaluation of the concrete performance, and the influence of the mud-containing artificial sand on the concrete mixture performance can be rapidly evaluated according to the current value by establishing the relationship between the mud content of the artificial sand and the corresponding current value when the slump of the concrete suddenly drops.

The present invention discloses a simulation method for the vertical leakage and damage process of water and sand in a ground-connected wall supporting foundation pit, comprising the following steps: embedding a defective card plate into a transparent outlet pipe, loading sand samples in layers in a transparent experimental box and compacting them in layers, installing a piezometer, and calculating the critical head difference of each layer of sand sample after the sand sample is saturated and consolidated; starting a simulation experiment, obtaining experimental data of the piezometer and the water and sand leakage quality, and determining the leakage and damage state of each layer of sand sample; calculating the additional unbearable head difference and the measured leakage and damage thickness of the critical layer sand sample, and then obtaining the time-varying data of the total leakage height of the sand layer during the simulation process; and using a visualization tool to establish a time-varying graph of pore water pressure, water and sand leakage quality, and the total leakage height of the sand layer. The simulation method established by the present invention can realize the simulation and data visualization of the leakage process, is helpful to explore the law and time of vertical leakage and damage of water and sand, can reflect the complexity of actual leakage, and is conducive to the development of research and teaching experiments.

This invention discloses a real-time detection method for the moisture content of fine aggregates in concrete production, belonging to the field of fine aggregate moisture content detection. The method includes: acquiring several sand samples with different moisture contents for different fine aggregates; extracting stable feature values ​​of the signal from the original signal sequence acquired by a microwave moisture content sensor for each sand sample using the sliding window density peak method; calculating the average thickness, average flow velocity, and average temperature; constructing a first prediction model based on an enhanced multiple regression model; constructing a second prediction model based on a tree model; determining the optimal moisture content prediction model from the first and second prediction models; and in concrete production, acquiring the stable feature values, thickness, flow velocity, and temperature of the signal in real time, and calling the optimal moisture content prediction model for the corresponding fine aggregate to predict the moisture content. This invention solves the problem of measurement inaccuracy caused by random fluctuations in the original signal and variable material flow conditions when using microwave methods to detect the moisture content of sand and gravel online.

The application discloses a kind of digital sand sample disc and its using method, it is related to well drilling engineering technical field, to solve the problem of low work efficiency of existing artificial cuttings logging mode, the digital sand sample disc includes sand sample disc body, the bottom of sand sample disc body is equipped with filter screen and water draining groove, filter screen is located above water draining groove, RFID radio frequency tag is equipped on the top of sand sample disc body, RFID radio frequency tag is used to collect the data of cuttings, detection device is equipped in sand sample disc body, detection device is used to detect the temperature, humidity and weight of cuttings in sand sample disc body in real time, control device is equipped on the top of sand sample disc body, control device is signal connected with RFID radio frequency tag and detection device, so setting, can realize the automation process of cuttings logging, improve the work efficiency of cuttings logging.

This invention discloses an underwater angle of repose measurement device and method for sand bodies under controllable background turbulence intensity in dynamic water conditions. The device includes a support frame, a base plate, a cylindrical platform, a hollow cylindrical baffle, sidewalls, an upstream baffle, a downstream baffle, a turbulence grid, an image acquisition module, and a supplementary lighting module. The hollow cylindrical baffle is fitted around the cylindrical platform to laterally confine the sand sample and form an initial cylindrical sand body. After extraction, the sand body naturally collapses underwater to form a cone. The upstream and downstream baffles form a local still water measurement zone. The turbulence grid can be inserted into different slots on the upstream side of the cylindrical platform, and different background turbulence intensity conditions can be created by changing the grid parameters. The image acquisition module is used to acquire a side view image of the sand cone and calculate the underwater angle of repose. This invention can achieve angle of repose measurement under still water, incoming current, and controllable background turbulence intensity in dynamic water conditions within the same device, and has the advantages of convenient operation and good measurement repeatability.

The invention discloses a sand soil stratified sampling device and a sampling method thereof, and belongs to the technical field of sand sampling equipment.The sand soil stratified sampling device comprises a workbench and a direct push drilling machine, a drill rod body is arranged at the output end of the direct push drilling machine, and the drill rod body comprises a connecting shaft, a connecting pipe, a drill bit and a far-point sampling mechanism; the far-point sampling mechanism comprises a sampling pipe, a rotating frame, a first guide block and a second guide block, and the first guide block and the second guide block are jointly connected with a moving frame and a guide assembly in a sliding mode. By means of the sand sampling device, in the sand sampling process, a wrapping layer, composed of surface layer sand grains and upper layer sand grains, of the outer wall of the sampling pipe can be broken through, far-point area sampling is conducted, and the sampling efficiency is improved; sand grains around the sampling pipe are prevented from being collected, meanwhile, the sand grains are in the natural downward flowing trend due to underground pressure, and the guide pipe obliquely moves upwards in the opposite direction, so that the sand grains cannot flow into a sampling area along with the guide pipe, and it is guaranteed that the collected sand grains all come from an original soil layer with the target depth.

The application discloses a kind of based on multi-modal fusion's flocculating agent residual influence evaluation method and system, the method includes the following steps: S1, by surface charge sensor, optical sensor and surface roughness detector, the electrical characteristic data, optical characteristic data and geometric morphological characteristic data of the surface of measured mechanism sand sample are collected;S2, corresponding multidimensional feature vector is extracted;S3, the multidimensional feature vector is input into the multi-modal fusion prediction model that is trained in advance, and the predicted fluidity loss rate value of the measured mechanism sand sample is obtained;S4, the predicted fluidity loss rate value is compared with preset safety threshold, and the corresponding flocculating agent residual evaluation result is generated.Thereby, by comparison with safety threshold, the influence of PAM residual amount on the fluidity of mortar is preliminarily screened, to provide basis for subsequent processing decision, and prediction is carried out in combination with machine learning model, in combination with machine learning and chemical detection means, sand sample detection is realized.

The application discloses an experimental device for testing maximum suction stress of sand and an experimental method thereof, belongs to the technical field of geotechnical engineering, and solves the problem that the maximum suction stress of sand cannot be measured in the prior art; the experimental device comprises a base fixed on a table top, a channel is formed in the end face of the base; a sample measuring cylinder is horizontally arranged in the channel and used for containing a sand sample; the sample measuring cylinder comprises a first measuring cylinder and a second measuring cylinder which are detachably connected, the second measuring cylinder is located directly below the first measuring cylinder and is slidingly arranged in the channel; and a sample pulling assembly is used for sliding the second measuring cylinder. The experimental device is simple, convenient to operate and clear in principle, the length of the sand sample falling under the action of a self-weight load can be measured, the maximum suction stress of sand under different water contents and relative compactness states can be calculated through a theoretical formula, the method is reasonable, the experiment can be repeated for many times, and the reliability is high.

The utility model discloses an automatic sand collector which comprises a sand collecting unit and a measuring unit, the measuring unit is horizontally arranged, the interior of the sand collecting unit is hollow, the sand collecting unit is vertically arranged on the upper surface of the measuring unit, and the bottom end of the sand collecting unit is correspondingly contacted and fixed with the upper surface of the measuring unit. And a sand inlet communicating with the interior of the sand collecting unit is formed in the top of the sand collecting unit. The device has the advantages that the device can automatically sense the wind and sand conditions, timely and accurately collect sand samples, automatically record related data of the wind and sand at the same time, improve the efficiency, accuracy and automation degree of sand collection work, and provide more reliable data support for research and prevention of the wind and sand.