165 results about "Aeolian sand" patented technology

The invention relates to the field of wind and sand prevention and control, in particular to a desert photovoltaic large base peripheral prevention and control system and method. The prevention and control system comprises a main air guide direction prevention and control system and a secondary air guide direction prevention and control system; the main wind direction prevention and control system is sequentially provided with three high vertical sand blocking fences, a lateral anti-lateral quicksand fence, a first sand stabilization grid area with a grid structure, two first plant sand blocking forest belts, a first plant sand stabilization area and a windproof sand blocking dust suppression fence in the direction from the upwind direction to the photovoltaic base. And the secondary wind guide direction prevention and control system comprises a second sand stabilization grid area, a second plant sand blocking forest belt and a second plant sand stabilization area. The sand prevention system can effectively solve the problems that an existing sand prevention technology is low in efficiency, unsustainable and the like, erosion and damage of sand grains to photovoltaic panels and infrastructures are reduced, the power generation efficiency is improved, the maintenance cost is reduced, long-term stable and efficient operation of a desert photovoltaic large base is guaranteed, and powerful support is provided for energy development and ecological protection balance in the desert area.

The invention relates to the technical field of saline-alkali land treatment and ecological engineering, in particular to a wind-sand-resistant self-adaptive saline-alkali land concealed pipe drainage system which comprises a water collecting pipe, a plurality of water seepage pipes and a photovoltaic power supply assembly. The drainage monitoring system and the sensing units are in signal connection with each other, the sensing units are arranged in the water collecting pipe and the water seepage pipe, and the photovoltaic power supply assembly is electrically connected with the sensing units; the photovoltaic power supply assembly is provided with a power monitoring module and a cleaning assembly. The drainage monitoring system comprises a data acquisition module, a salt migration analysis module and a control execution module. Energy supply is guaranteed through the wind-sand-resistant design and the self-cleaning function of the photovoltaic power supply assembly, parameters such as water flow and salt concentration are monitored in real time in combination with the sensing unit, the drainage strategy is dynamically regulated and controlled through the drainage monitoring system, and efficient discharge of saline-alkali soil salt and stable operation in the wind-sand environment are achieved.

The invention discloses a sand-avoiding anti-blocking gutter inlet device suitable for desert photovoltaic and wind power bases. Comprising a rain grate, a well body, a well chamber and a gutter inlet pipe, the structure is characterized in that: (1) the gutter inlet pipe is an upper sand-avoiding gutter inlet pipe which is arranged at the upper part of the side wall of the well body and can avoid desilting at the lower part of the well chamber; a sand blocking groove capable of blocking rain and sand from flowing into the well chamber is additionally formed in the outer wall of the well body; (3) the rain grate is a sand blocking and shielding type rain grate; (4) a hand-held well container is arranged in the well chamber, and a hand-held groove container is arranged in the sand blocking groove, so that wet sand, seedlings and grass are convenient to clean; and (5) a rat-proof and mosquito-repellent valve is arranged on the sand blocking groove. The invention has the advantages that: (1) wind sand and rain sand can be prevented from flowing into a well chamber and a rainwater pipe network to possibly cause waterlogging to erode power generation equipment; (2) the water collection effect can be improved; mice and mosquitoes can be prevented from going in and out of the well chamber to propagate and spread diseases. The sand-avoiding anti-blocking gutter inlet device serves as a starting part of a rainwater pipe network and is suitable for being used when rainwater collecting facilities are built and the rainwater pipe network is laid in desert photovoltaic and wind power bases.

The invention relates to the technical field of roadbed filling, in particular to a method for monitoring the filling process of aeolian sand improved soil for a high-speed rail roadbed, which comprises the following steps: filling the high-speed rail roadbed with the aeolian sand improved soil in a layered filling manner, dividing the surface of a compaction layer into a plurality of areas, and uniformly sprinkling water to the plurality of areas according to a preset sprinkling amount, determining whether the pore distribution of the aeolian sand improved soil of the compaction layer is uniform or not according to the infrared thermal imaging image of the single area after watering, and optimizing the loose laying thickness of the new filling layer; acquiring a thickness loss rate so as to adjust an overlapped rolling area of the road roller in the re-pressing process based on the over-pressing area, and adjusting the vibration frequency of the road roller in the re-pressing process based on the under-pressing area; obtaining the initial position of the interlayer interface after the newly-filled layer finishes initial pressing and the real-time position of the interlayer interface in the re-pressing process, and optimizing the vibration frequency according to the distance stability; and the preset water spraying amount is optimized based on the surface flatness characterization value of the new filling layer in the final pressing process. The filling quality of the high-speed rail roadbed is improved.

The application discloses a fly ash-based sand-fixing system, a sand-fixing method and application. The sand-fixing system comprises fly ash-based sand-fixing particles, a fly ash-based sand-fixing plate device and a fly ash-based sand-fixing agent; the fly ash-based sand-fixing particles are laid on a sand surface layer and used for slowing down wind speed and intercepting floating sand; the fly ash-based sand-fixing plate device comprises a plate body and a fixing member, the plate body is perpendicular to a main wind direction, and the fixing member is used for achieving detachable splicing of adjacent plate bodies, so as to form a three-dimensional grid protection structure and block wind sand migration; and the fly ash-based sand-fixing agent is applied to the sand surface layer to form a consolidated layer and consolidate the surface sand body. The fly ash-based sand-fixing particles, the fly ash-based sand-fixing plate device and the fly ash-based sand-fixing agent are cooperated to form an initial stable layer, a physical barrier and a consolidated layer, and the sand-fixing system has the advantages of high strength, environmental protection, long-term effect and economy and is suitable for rapid treatment of desertification land.

The utility model relates to the technical field of sand prevention and control, in particular to a sand prevention and control coaming structure which comprises an installation bottom plate, a plug pin column is arranged at the bottom of the installation bottom plate, a coaming shell is installed on the outer wall of the installation bottom plate, and a lifting assembly is installed on the inner wall of the coaming shell. A connecting assembly is installed on the side wall of the coaming shell, air inlet holes are formed in the opposite outer walls of the coaming shell, and triangular plates are arranged on the opposite side walls of the coaming shell. According to the device, airflow is directly blown into the connecting shell, the connecting shell drives the sliding shell to slide upwards on the inner wall of the sliding rail, then the airflow is blown out through the air outlet, the sliding shell and the coaming shell are matched with each other to adjust the height, and the device automatically adjusts the height of the fence according to the strength of wind and sand; and when the two groups of coaming shells move, the fixing plates are driven to move respectively, and the connecting glue sticks between the fixing plates can be elastically deformed, so that the practicability of the device is better.

The invention discloses an active turbulent flow type sand blocking system. The active turbulent flow type sand blocking system comprises a first turbulent flow belt, wherein the first turbulent flow belt comprises a first supporting column, a first cable net and a first wind resistance plate; the plurality of first supporting columns are arranged side by side into a plurality of rows and are distributed at intervals; the first cable net is connected between every two adjacent first supporting columns in each row; and a plurality of first wind resistance plates are arranged on each row of first cable nets, and the plurality of first wind resistance plates on each row of first cable nets are distributed between the adjacent first supporting columns at intervals. According to the active turbulent flow type sand blocking system, the turbulent flow field is constructed and formed through point vortexes formed at all the wind blocking plates, the turbulent flow field is used for achieving active turbulent flow on wind-sand flow, macroscopic ordered kinetic energy efficient dissipation is conducted on the wind-sand flow, and the purposes of effective interception and sedimentation are achieved.

The utility model discloses a sand removing device for a directional fan of a pumping well polish rod sealer. The sand removing device comprises a fixing rod, a notch flange, a support, a transmission shaft, a fixing support, an air bellow, an impeller mechanism and a belt wheel mechanism. The air outlet of the air bellow is communicated with the interior of the polish rod sealer through a pipeline, the fixing rod is inserted into the wellhead of an oil well, after wind and sand are blown, the blade fan can be blown to rotate, the blade fan drives the transmission shaft to rotate through the transmission mechanism, the transmission shaft drives the belt wheel mechanism to rotate, the impeller mechanism in the air bellow rotates, and after the impeller mechanism rotates, the belt wheel mechanism rotates. Air is sucked from the air inlet and then is blown into the polish rod sealer through the pipeline of the air outlet, so that convection is formed between air in the polish rod sealer and external sand wind, wind is controlled by wind, external natural wind is used for manufacturing directional wind, sand grains on a polish rod, making contact with the polish rod sealer, of a pumping well of a machine are cleared away, and the polish rod sealer is cleaned away. The problem that the sucker rod is damaged due to the fact that sand blown into the sealer is solved, the filter is arranged at the air inlet, and sand is prevented from being blown into the sealer from the inside.

The application discloses a kind of anti-frost heaving and thawing subgrade and its construction method, blind ditch and aeolian sand layer are arranged at the bottom of the subgrade, from bottom to top, pebble layer, soil replacement layer, semi-rigid structure layer, anti-freezing temperature insulation layer, waterproof layer and pavement layer are sequentially arranged in the subgrade, the pebble layer is embedded with ventilation layer, which is used to ventilate and cool the lower part of the subgrade to prevent thawing and sinking, the semi-rigid structure layer is embedded with heat pipe in the anti-frost heating system, and geotextile drainage layer extending to the outside of the slope is arranged above and below the heat pipe, which is used to heat the upper part of the subgrade and drain water to prevent frost heaving.The application uses solar energy to heat the inside of the subgrade, and effectively improves the absorption rate of solar energy by setting heat collector and heat absorption cavity, which improves the heating effect of the upper part of the subgrade to prevent frost heaving, and at the same time, strengthens the heat dissipation of the lower part of the subgrade to prevent thawing and sinking.

The application provides a sound wave conversion multi-directional sand collecting instrument, and relates to the technical field of sand collecting instruments. The sound wave conversion multi-directional sand collecting instrument comprises a support, collecting boxes, sound wave sensors, wind speed sensors and a processor. The collecting boxes are arranged at intervals around the support. The bottom of each collecting box is provided with a sound wave sensor which converts the sound wave generated by the impact of sand particles into an electric signal. One wind speed sensor is installed on one side of each collecting box to detect the speed of the wind-sand flow entering the collecting box. The processor is electrically connected with the sound wave sensors and the wind speed sensors. The processor counts the electric signals, forms a sound wave spectrum, and calculates the number a of sand particles and the mass m of a single sand particle entering the collecting box according to the sound wave spectrum and the speed. The total mass M of the sand particles is calculated according to the number a and the mass m. The sound wave conversion multi-directional sand collecting instrument can detect the wind-sand activity in all directions, is not limited by the particle size of the sand particles, and does not need manual weighing, so it is convenient and easy to use.

The invention discloses a photovoltaic desertification control system based on photovoltaic electric field waste and a construction method and application of the photovoltaic desertification control system. The photovoltaic desertification control system comprises a grid sand barrier unit, a sand blocking barrier unit, a vegetation planting unit and a sand fixing barrier unit, wherein the grid sand barrier unit and the sand blocking barrier unit are sequentially arranged on the periphery of a photovoltaic field area in the main wind direction; and the vegetation planting unit and the sand fixing barrier unit are arranged in the photovoltaic field area. Each grid sand barrier unit comprises a grid sand barrier extending in a zigzag shape on the ground, and each grid unit is composed of a plurality of vertical barrier bodies and a support; the sand-blocking barrier unit comprises a ground trapezoidal sand-blocking barrier and is composed of a support and two barrier bodies which are symmetrically and obliquely erected on the two sides of the support. The vegetation planting unit comprises a planting plate covering the ground between photovoltaic panels; the sand-fixing barrier unit comprises a ground straw bionic sand-fixing barrier under a photovoltaic panel. The barrier body is processed by a waste photovoltaic panel packaging base, and the support and the support are respectively processed by waste cable packaging rollers. The system blocks sand on the periphery and stabilizes sand in the field, so that the photovoltaic electric field is protected from being damaged by wind and sand, and stable operation of the photovoltaic electric field is guaranteed.

The invention discloses an improvement method for soluble salt in sandy soil, which comprises the following steps: S1, screening the soluble salt-containing sandy soil, separating and removing salt-containing fine particles with the particle size less than the preset particle size, and retaining coarse-particle aggregate; s2, mixing the aeolian sand with fly ash to form a composite modifier; s3, mixing the coarse particle aggregate with the composite modifier to form a uniform mixed soil body; and S4, the mixed soil body is compacted and maintained. Fine particle bodies enriched with soluble salts are removed through physical screening, then the obtained coarse particle aggregate is combined with the aeolian sand and the fly ash to react to generate a gelling substance, the aeolian sand and the coarse particle aggregate are firmly bonded, the fly ash can adsorb and fix a small amount of salt remaining on the surface of the coarse particle aggregate, and the salt content in the coarse particle aggregate is reduced. Salt migration, crystal expansion and corrosion to the structure are effectively inhibited; furthermore, the unconfined compressive strength, the shear strength and the integrity of the improved soil body are remarkably improved, so that the soil body meets the strength and stability requirements of projects such as roadbeds and base layers.

The utility model relates to the technical field of greenhouses, in particular to a greenhouse ventilation opening sand-proof structure which comprises an installation frame, a ventilation opening and a sand-proof device, the ventilation opening is formed in the surface of the installation frame, the sand-proof device is arranged on the surface of the ventilation opening, the sand-proof device comprises a sand-proof assembly, a sand discharging assembly and an auxiliary assembly, and the sand-proof assembly comprises a sliding groove. The sliding grooves are formed in the surfaces of the ventilation openings, the surfaces of the sliding grooves are slidably connected with sand-proof nets, the surfaces of the sand-proof nets are fixedly connected with first springs, the ends, away from the sand-proof nets, of the first springs are fixedly connected with the surfaces of the sliding grooves, and balls are arranged on the surfaces of the sand-proof nets in a rolling mode. The sand-proof device is arranged, sand and dust are prevented from entering the greenhouse through double protection of the sand-proof net and the filter net, the sand-proof net is continuously shaken through wind power when the sand storm is large, the sand and dust are shaken off so as to avoid blocking the sand-proof net, the shaken-off sand and dust can be discharged out of the ventilation opening, and the sand and dust are prevented from being blown by the wind power to rise again. And therefore, the durability of the equipment is effectively improved.

The application discloses a kind of considering wind sand additional effect's coal mining subsidence area boundary prediction method and system, belong to subsidence area boundary prediction field.The prediction method includes: obtaining the synthetic aperture radar image of coal mining area;According to synthetic aperture radar image, the first coal mining subsidence area boundary caused by monitoring coal mining;According to the mapping model of preposition and the wind speed and sand particle size of coal mining area, the wind sand movement boundary caused by wind sand migration is calculated, wherein, mapping model is the model for representing the mapping relationship between wind speed, sand particle size and wind sand movement boundary;The first coal mining subsidence area boundary is corrected using wind sand movement boundary, and the second coal mining subsidence area boundary is obtained.The method and system of the application improve the prediction accuracy of coal mining subsidence area boundary, and have higher dynamic adaptability.

The utility model relates to the technical field of vibration tests, and particularly discloses an aeolian sand roadbed vibration wave excitation test device which comprises an excitation mechanism, a clamping mechanism and a data acquisition mechanism. The vibration excitation mechanism comprises a signal generator, a power amplifier and a vibration exciter; the clamping mechanism comprises a clamping plate, a bolt and a transverse plate. The data acquisition mechanism comprises an acceleration sensor, a dynamic data acquisition unit and a data processor. Through the arranged excitation mechanism, the excitation state of a train at different speeds and under different load conditions can be effectively simulated by adjusting the output frequency and excitation force, the damage condition of the aeolian sand improved soil under different excitation conditions can be accurately obtained, and the damage condition of the aeolian sand improved soil under different excitation conditions can be accurately detected through the arranged data collector. The dynamic response characteristics of the cement modified aeolian sand sample under the excitation condition can be effectively obtained, so that the internal change of the cement modified aeolian sand sample is judged.

This invention discloses a solar-powered long-distance, low-energy-consumption transportation method for desert sand. The method first uses ArcGIS software to acquire topographic and environmental data of the transportation area between the aeolian sand collection location and the mining area. This data is then further extracted and processed to form path feature parameters, including slope, elevation change, surface undulation, transportation distance, and unit energy consumption. Next, a minimum energy consumption route optimization model is established based on these path feature parameters. Candidate transportation routes are comprehensively evaluated for energy consumption, and the lowest-energy-consumption transportation route is selected. Further optimization is performed based on the segmented energy consumption requirements, path length, and slope change of the lowest-energy-consumption transportation route. Based on the distribution of nodes, the layout scheme of the transmission line and solar power supply functional units is determined, and the transmission line and power supply functional units are arranged along the route. The solar power supply functional units include solar power generation units, solar energy storage units, power conversion units, and power supply control units. Simultaneously, based on the high-load sections, slope-changing sections, turning sections, or fault-prone sections of the lowest energy consumption transportation route, a monitoring point layout scheme is determined, and monitoring and control terminals and sensors are set up to monitor the operating status of the transmission equipment in real time, promptly identify wear, deviation, and other fault risks, and provide early warnings and adjustments. This method achieves low-energy consumption optimization for long-distance desert sand transportation routes, as well as energy supply configuration, intelligent monitoring, and feedback control during the transportation process, solving the problems of difficult energy supply, high energy consumption, and insufficient equipment reliability in existing desert sand transportation processes.

The utility model provides a sandstorm flow sand collecting device, which relates to the technical field of environment measurement and comprises a vertical frame and a base, the base is arranged at the bottom of the vertical frame, and the vertical frame and the base are of a combined structure assembled and disassembled in a pluggable mode. A plurality of unit boxes are vertically arranged in the vertical frame, sand collecting bags are embedded in the unit boxes, strip-shaped grooves with mesh faces inside are formed between the two sides of the sand collecting bags and the unit boxes in a penetrating mode, and side air channels connected with the strip-shaped grooves are formed in the outer ends of the unit boxes. A suction pump is arranged in the base, and a vertical pump pipe extends from the suction pump of the base to the vertical frame end; the vertical sand collection device has the beneficial effects that based on the vertically arranged sand collection structure, a box body with a corresponding specification is conveniently arranged according to a specific vertical distribution height and a collection environment through the vertically distributed unit type box body structure, and a vertical pump pipe at the middle end part of the unit box is combined with an external pumping structure; air flow can be conveniently pumped into the upper unit box, and suspended sand grains in the air flow can be collected in a short time.

The invention provides a large-flow-state coal-based solid waste filling material as well as a preparation method and application thereof, and belongs to the technical field of building materials. The coal ash and the coal cinder are rich in silicon and aluminum components and can be compounded with the aeolian sand to prepare a large-flow-state material, the cohesiveness can be improved by exciting the gelatinization activity in a synergistic utilization mode, the framework effect of the aeolian sand and the coal cinder can be achieved, the shrinkage crack risk is effectively reduced, and the anti-cracking performance is improved. And a feasible path is provided for solid waste recycling and efficient utilization of the aeolian sand. According to the invention, coal-based solid wastes (fly ash, coal cinder and gypsum), aeolian sand and cement are used as main raw materials, and a water reducing component, a retarding component, an air entraining component and an expansion component are added; the large flow state, low shrinkage and good durability of the material are achieved through a gel system (low cement-high fly ash-gypsum synergistic excitation), aggregate grading (coal cinder-aeolian sand proportion control) and functional additive compounding, and an innovative solution is provided for bridge abutment back backfilling in cold regions.

The application discloses a kind of aeolian sand layered density measurement methods, steps are as follows: a top open water tank is arranged in advance, connect multiple connecting pipes at the bottom of water tank, each connecting pipe is vertically provided with pressure measuring tube, water tank has floating plate floating on water surface, and floating plate is fixed with sand container; after floating plate and sand container float up and stabilize, the initial height of water column in pressure measuring tube is recorded; aeolian sand layer with thickness d is added in sand container in batches, the change value of water column height Δh in pressure measuring tube is recorded, and the mass, volume and density of the layer aeolian sand under Δh height change are calculated;Repeat the above steps, assume that aeolian sand is n layers, when the total thickness of aeolian sand layer reaches D, the final mass m of sand layer of total thickness D of aeolian sand layer is calculated total , total density ρ total ; finally, the layered density of each aeolian sand is obtained by recursive calculation.The application aims to provide a kind of layered density measurement method capable of measuring the layered density of each layer of aeolian sand.

The invention provides an aeolian sand filler layered compaction construction method which comprises the following steps: base treatment and primary compaction: digging out a soil layer and vegetation with a preset depth in a dike base range to obtain a foundation pit, backfilling the foundation pit to a preset height by using aeolian sand, and carrying out primary compaction; paving the improved filler, namely paving the improved filler on the base platform to form a main body filling layer with a flat surface; the grid water storage comprises the steps that improved filler is piled and filled on the main body filling layer to construct a plurality of sand ridges to form grids, and water is injected into each grid; the three-stage rolling compaction comprises the following steps: sequentially carrying out pressure stabilization, vibration compaction and final compaction on the main body filling layer after the grid water storage to form a compact embankment layer; and compaction degree detection comprises the steps of carrying out compaction degree detection on the dense embankment layer, supplementing pressure when the compaction degree is unqualified, entering the next layer of improved filler paving until the compaction degree is qualified, and trimming a slope and paving a protective layer after paving to a designed elevation. After the scheme is implemented, an embankment body project is reliable in quality and stable in performance.

The application belongs to the technical field of road engineering and foundation treatment, and provides a wind-sand composite roadbed resource intelligent grouting construction method and equipment, which comprises the following steps: after the foundation is leveled, wind-sand is used as the main filler to carry out layered paving and compaction of embankment and lower roadbed; grouting point positions are laid out on the lower roadbed layer; high-performance slurry is used to carry out pressure grouting, and based on the real-time collection results of the compaction degree, the penetration pressure-depth curve, the grouting flow, the lifting speed and the grouting amount per unit depth, the opening and closing of the grouting valve, the grouting pressure and the lifting speed are interlocked controlled or adaptively adjusted to form a continuous and uniform cement column reinforced body; the column top is controlled to be higher than the top surface of the lower roadbed to form a protruding section and is maintained until the preset strength is reached; then, geogrid is laid to make the column top protruding section penetrate and embed in the grid mesh, and the upper roadbed and the pavement structure are continuously constructed; the application takes into account the resource utilization of wind-sand, the collaborative utilization of industrial solid waste and the intelligent control in the construction process.

The invention discloses a wind prevention and sand fixation special-shaped rope based on thermoplastic recycled materials and a preparation and use method thereof, and belongs to the field of special rope preparation. The rope comprises a straight core layer formed by tightly bundling inner layer long strips; the wave outer layer is composed of a series of arch structures formed by periodically protruding outer layer long strips; wherein the arched structure is fixed through at least two bundling points, the first bundling point is located at the starting end of the arched structure, and the inner-layer long strips and the outer-layer long strips are fixed; and the second bundling point is positioned at the raised bottom of the arch structure. According to the composite rope, the physical anchoring function and the pneumatic speed reduction function are creatively integrated. The lower end of the periodic arch-shaped structure is deeply buried in sand to form a stable ground anchor, and the wind pulling resistance is far better than that of a traditional tiled sand-proof net; tens of thousands of micro arched units at the upper end act synergistically, so that the sand flow near the ground can be disturbed efficiently, the wind speed is reduced remarkably, sand deposition is promoted, and the stability and durability of sand stabilization are improved fundamentally.

The utility model belongs to the technical field of engineering experiment equipment, and relates to an indoor maximum dry density test mold for aeolian sand roadbed water sinking method construction, which consists of a base (1), a bottom plate (2), a test cylinder (3), a sleeve (4), a fixing frame (5) and a fastening bolt (6), and is characterized in that the test cylinder (3) and the bottom plate (2) are sleeved on the base (1), the sleeve (4) is sleeved on the test cylinder (3), and the fixing frame (5) is sleeved on the bottom plate (2). The fixing frame (5) is connected with the base (1), and the fastening bolt (6) is used for fixing the sleeve (4) and the test barrel (6) on the base (1). The mold for the indoor maximum dry density test of the aeolian sand roadbed constructed by the water precipitation method is simple to operate, water can be smoothly discharged out of a test piece in the compaction process of the indoor maximum dry density test of the aeolian sand roadbed constructed by the water precipitation method, the maximum dry density of aeolian sand is favorably improved, and the compaction degree is improved.

The application discloses a wind-sand environment simulation experiment table and application thereof, and relates to the technical field of wind-sand environment simulation experiments, and comprises a box body, the box body is provided with a transparent cover, the transparent cover covers half of the shell of the box body, sand filter screens are screw-connected to the front end and the rear end of the box body, and circular sand filter screens are fixedly connected to the middle portions of the sand filter screens. The wind-sand environment simulation experiment table and application thereof automatically guide the sand in the sand tank to the small magnetic valve pipe and the large magnetic valve pipe, ensure that the wind-sand assembly can continuously output the sand from the magnetic valve pipe structure under the condition of sand, and avoid the interruption phenomenon, so that the sand can be finally completely drained from the sand tank, sand particle residues are avoided, the problem of manually cleaning the sand particles in the sand tank is avoided, and the accurate statistics and collection of the total amount of sand changes in the wind-sand environment simulation experiment are facilitated.

The present invention provides a method for landfilling coal gangue in goaf areas. The method comprises mixing a first coal gangue, a second coal gangue, a first portion of fly ash, sodium polyacrylate, sodium bentonite, and water to obtain a bottom landfill anti-permeability layer; filling the surface with a fourth coal gangue, mixing aeolian sand, a second portion of fly ash, a third coal gangue, sodium bentonite, and water to obtain a coal gangue gel, which is injected into the voids of the fourth coal gangue to obtain a coal gangue filling layer; covering the coal gangue filling layer with solid waste residue and / or sludge to obtain a compacted layer; alternating the coal gangue filling layer and the compacted layer until the goaf is filled; and finally, placing a soil cover layer. The present invention adopts a multi-layer alternating landfill method, using graded coal gangue as the main material for the anti-permeability layer. No calcination or other treatment is required, and the heavy metal pollution problem can be solved while reducing landfill costs. The coal gangue gel can further adsorb heavy metals while being flame retardant and improving the mechanical strength of the landfill body.

The application discloses a photovoltaic sand-fixing device and a sand-fixing method, and belongs to the technical field of photovoltaic sand control. The device comprises multiple rows of protection units. The protection unit comprises a photovoltaic panel, a support, a foundation pile and a sand-fixing net. The foundation pile is provided with a pre-embedded part, and the pre-embedded part is connected with a pressing strip plate. The pressing strip plate presses the sand-fixing net on the pre-embedded part. The sand-fixing net is arranged between the foundation piles, so that the ground wind speed can be reduced, the wind sand can be effectively blocked, the construction operation is facilitated, the material cost is reduced, the change of terrain is adapted, the growth of vegetation is not hindered, the sand-fixing net is pressed tightly on a strip surface, the service life of the sand-fixing net at the connecting position is longer, and the connection is more stable. The sand-fixing net is continuously laid on one row of protection units, so that the installation is rapid and simple. When partial damage occurs, a section of the sand-fixing net between two foundation piles can be replaced individually, so that the replacement is simple and fast, the entire sand-fixing net does not need to be replaced, and the maintenance cost is low.

This invention discloses a modified aeolian sand road base material, composed of the following parts by weight: aeolian sand: 620-635 parts; fine aggregate: 1030-1055 parts; coarse aggregate: 3510-3580 parts; modified aeolian sand powder: 230-265 parts; cement: 50-80 parts; superabsorbent polymer: 0.32-0.96 parts; water: 425-525 parts. The modified aeolian sand is a composite modified aeolian sand of metakaolin, phosphogypsum, and triethanolamine, and is cured using a water glass-polyvinyl acetate composite curing agent. The modified aeolian sand has characteristics such as small particle size, high specific surface area, strong reactivity, and good viscosity. Adding it to base materials can improve their mechanical properties, volume stability, and durability, and it has low cost and good economic benefits, showing good application potential in cementitious materials and pavement materials.

The embodiment of the invention provides a dewatering and drainage construction method for a high-water-level fan foundation pit in a desert windy and sandy area. According to the method, the fan foundation pit is excavated in a layered excavation mode. In the excavation process of the foundation pit, every time the foundation pit is excavated downwards by one layer, an annular drainage ditch extending along the edge line of the bottom of the foundation pit and a water collecting well communicating with the annular drainage ditch are arranged at the bottom of the current foundation pit, and accumulated water collected in the water collecting well is pumped and drained through drainage equipment so as to conduct dewatering and drainage on the current foundation pit; and when the underground water level at the bottom of the current foundation pit meets the preset dryness requirement through dewatering and drainage, downward digging is further conducted on the basis of the current foundation pit, dewatering and drainage are conducted on the basis of the same principle, and then downward digging continues to continue dewatering and drainage till the elevation of the bottom of the foundation pit reaches the designed elevation through downward digging. According to the method, the foundation pit is effectively dewatered and drained in the construction process of the wind turbine foundation pit, and the construction safety during wind turbine foundation construction in a high underground water level area can be improved.

A novel composite assembly type multifunctional sand barrier relates to the field of environmental governance and comprises a bearing base plate, a water storage unit and a plurality of side plates. A water leakage and sand passing hole and a plurality of assembling holes are formed in the bearing base plate, the side plates are detachably inserted into the assembling holes respectively, the bearing base plate and the side plates are matched to define a containing cavity, and the water leakage and sand passing hole is located in the containing cavity; the water storage unit is installed on the edge of the bearing base plate. Through the modular design, the multi-dimensional breakthrough of rapid deployment-dynamic adaptation-ecological cultivation is achieved, the transportation cost and the construction cost can be effectively reduced, free adjustment, recycling and plant tending of the sand barrier can be achieved, and the sand barrier is of great significance to emergency rescue in the windy and sandy area and construction of a long-acting wind and sand protection system.

The invention discloses a sand wind early warning device, a self-calibration method and an early warning method. The sand wind early warning device comprises a collection unit, a counterweight unit, a gravity response mechanism, a trigger switch and an alarm actuator. The collecting unit is exposed outside to receive sand wind, the counterweight unit is arranged in the closed cavity and internally provided with a reference counterweight, the counterweight unit and the closed cavity are in suspension connection through the balance rod, the trigger switch responds to a displacement signal of the second end of the balance rod, and the alarm actuator is electrically connected with the trigger switch. The collecting unit can directly receive external wind and sand, the weight of the collecting unit is increased along with wind and sand accumulation, the second end is driven to move through the lever effect of the balance rod, the switch is triggered to act, the alarm actuator is driven, and real-time monitoring and alarm of the wind and sand accumulation state are achieved. The problems that the severity of wind and sand floating in the equipment terminal box cannot be visually reflected and an alarm cannot be given in the prior art are solved.