28 results about "Check dam" patented technology

The invention relates to the technical field of intelligent water conservancy and automatic control, in particular to a polder area multi-station water conservancy data real-time collection and intelligent fusion processing method and system, and the method comprises the steps: a multi-dimensional collection system construction step: collecting time sequence state, fluid field and environment boundary data, and executing time base unified cleaning; an ideal model construction step: constructing an ideal water tank model based on the law of conservation of mass and generating an ideal water level change curve; a parameter injection simulation step: generating a simulation fault water level curve according to injection efficiency attenuation and medium leakage parameters; a double-track difference calculation step: respectively carrying out difference on actual measurement and simulation data and an ideal curve to generate real and theoretical residual vectors; a similarity judgment and control step: calculating sequence similarity to judge a real physical fault or sensor data noise, and generating a fusion control instruction; according to the invention, the technical problem of distinguishing the noise of the sensor from the real physical fault is effectively solved, and false alarm or missing alarm is avoided.

The utility model discloses a passive blocking and protecting structure for ditch source collapse rolling stones, which comprises a multi-stage blocking structure arranged in a ditch and a buffer percolation structure arranged on the inner side of the blocking structure, the blocking structure further comprises a sheet-pile wall and a gravity type check dam, the sheet-pile wall is arranged at the lower part or the tail end of the ditch source collapse of the ditch, and the gravity type check dam is arranged on the lower part or the tail end of the ditch source collapse of the ditch. A multi-stage gravity type check dam is distributed in the channel on the front side of the sheet-pile wall; the blocking structure can be completely arranged to be a sheet-pile wall or a gravity type check dam. The blocking structure can be alternately provided with sheet-pile walls and gravity type check dam dams according to terrains; the buffering percolation structure further comprises a buffering layer, a rockfall groove and a percolation structure. Through the design of the blocking structure, the buffer layer and the percolation structure, the purposes of blocking rolling stones, draining ditch water and effectively preventing the ditch source from collapsing the rolling stones can be achieved.

The present application relates to a kind of mudslide dam based on the quick design method of motion energy analysis, comprising the following steps: step S1: according to the situation of geological exploration, preliminary selection n dam arrangement position, corresponding n kinds of working conditions, subsequent analysis is carried out according to each working condition;Step S2: the motion process of mudslide is simulated using SPH method, flexible disaster mitigation measures are applied, and the retarding effect of dam on mudslide is simulated using virtual wall particle;Step S3: calculate the impact characteristic parameter of mudslide, including the impact time Δ t Of leading head, impact average speed, the length L Of leading head, the volume Vol head Of leading head, impact load size Load impact ;Step S4: calculate the design characteristic parameter of dam, obtain the cross section design characteristic parameter of dam under different downstream slope, including dam height H , dam top length L T , dam top width W T , dam bottom length L B And dam bottom width W B This method can realize the quick design of dam characteristic size.

The invention discloses a debris flow silt arrester disaster prevention benefit evaluation method, and the method comprises the steps: constructing a hierarchical evaluation system which faces a future operation state and can integrate landform shape constraints, reservoir capacity operation conditions and a safety risk state on the premise of not remarkably increasing the data acquisition cost; according to the invention, an integrated technology of AHP weighting, two-level fuzzy synthesis and maximum membership level judgment is provided; wherein a calculation framework based on threshold determination and piecewise linear membership functions, qualitative index feature vector assignment, penalty mapping of interval optimal indexes and two-stage fuzzy comprehensive evaluation jointly form core features of the method; the weight is determined based on the analytic hierarchy process, the consistency check is passed, the two-stage fuzzy comprehensive evaluation and the maximum membership principle are further adopted to output the levels of'excellent, good, medium and poor ', and a quantitative basis is provided for inspection and maintenance of the silt arrester, desilting modification and risk grading management and control.

The utility model relates to a three-purpose underwater construction system for a diversion cofferdam construction platform, which belongs to the technical field of diversion cofferdam construction and comprises two river banks, two U-shaped frames are arranged between the two river banks, a plurality of cylinders are fixedly mounted at the top ends of the U-shaped frames, piston rods of the cylinders are fixedly connected with hooks, and a portable retaining dam is arranged at the bottom ends of the U-shaped frames. The portable retaining dam has the advantages that a river channel between two river banks can be blocked through the portable retaining dam, so that the water flow velocity of the river channel is slowed down, an important buffering effect is achieved, the portable retaining dam has the advantages of being easy to arrange, convenient and fast to remove, capable of being turned and reused and the like, the pipe grooves are excavated in the river banks, and the pipe grooves are convenient to carry. When a cofferdam construction platform is constructed, part of river water flows out through the flow guide pipes to share the flow guide pressure of the portable retaining dam, so that the cofferdam construction water flow impact force can be further reduced, the cofferdam construction platform can be better constructed, and the cofferdam stability is improved.

This invention discloses a silt-retaining dam structure based on 3D printing and extrusion modules, comprising a stepped dam body, a 3D-printed protective shell, a spillway energy dissipation system, and a surface reinforcement layer. The stepped dam body is assembled from prefabricated loess-based extrusion modules using a mortise and tenon structure, with each layer dry-laid layer by layer from bottom to top in a staggered pattern, the width of each layer decreasing with increasing height. The spillway energy dissipation system is constructed by progressively narrowing and staggering the extrusion modules to create the spillway. The energy dissipation structure within the reserved space is integrally formed with the 3D-printed protective shell on the upstream slope and dam crest, without construction joints. The 3D-printed protective shell is formed on the upstream slope and dam crest using the extrusion modules as the base surface. The surface reinforcement layer is applied to the exposed surfaces of the 3D-printed protective shell and energy dissipation structure, simultaneously filling the module seams and printed micropores. This structure constructs a three-layer collaborative protection system, enabling rapid assembly, stable operation, and low-cost maintenance.

The utility model belongs to the technical field of water and soil conservation engineering, and particularly relates to an ecological bag net cage check dam. The ecological bag net cage is formed by building a plurality of ecological bag net cage units, each ecological bag net cage unit comprises a gabion net cage, an ecological bag filling body is arranged in each gabion net cage, each ecological bag filling body is composed of a plurality of ecological bags, a cavity is formed in the center of each ecological bag filling body, and each cavity is filled with soil. The ecological bags are used as fillers in the gabion net cage, so that the stability is high, and meanwhile, the building cost of the check dam is reduced.

The invention discloses a willow pile fracture monitoring and maintenance system and method for a biological check dam, and the system comprises a willow pile fracture self-excitation sensing module, a precise rooting maintenance module, a drought period synergistic water seepage and storage module and a system platform, the willow pile fracture self-excitation sensing module realizes real-time early warning monitoring and accurate positioning alarm of willow pile fracture, and the accurate rooting maintenance module generates a customized replanting scheme according to willow pile file data issued by the system platform and an adaptive algorithm. And the drought-period synergistic water seepage and storage module is combined with the pre-embedded biodegradable maintenance bag and the capillary water delivery carrier to strengthen the rooting effect and the water supply in the drought period. According to the system, traditional post-repair is upgraded into an intelligent management mode with real-time response, active intervention and continuous guarantee, the technical problems that in willow pile management of an existing biological check dam, breakage alarm is lagged, a complementary planting scheme is extensive, and water supply is insufficient in the drought period are solved, and the structural stability, ecological adaptability and self-maintaining capacity of the biological check dam are remarkably improved.

The invention belongs to the technical field of intelligent hydropower, and discloses a data-driven dam safety state analysis method and system, and the method comprises the steps: obtaining dam operation data, and carrying out the preprocessing of the dam operation data; verifying the preprocessed dam operation data, and filtering out invalid or abnormal data; obtaining a real-time index, an accuracy index and an integrity index according to the verified dam operation data, and carrying out weighted calculation on the real-time index, the accuracy index and the integrity index to obtain a comprehensive safety index; according to the comprehensive safety index, an Echarts engine is adopted for real-time rendering to obtain a dam safety state thermodynamic diagram, visualization and intelligent warning of the dam safety state are achieved, accurate and efficient decision support is provided for dam safety management, and the problems that in the prior art, a dam safety management evaluation method is low in efficiency, high in subjectivity and high in reliability are solved. And dynamic behaviors and long-term performance changes of the dam are difficult to comprehensively reflect.

The sliding fit structure comprises the blocking plate and sliding rails arranged on the side walls of the two sides of a debris flow channel, and is characterized in that the sliding rails are installed in sliding rail grooves, and rolling wheels are arranged on the lower side of the outer portion of the blocking plate and matched with the sliding rails; the two sides of a notch in the upper end of the sliding rail groove are each fixedly provided with an elastic sealing piece. The sliding rail groove can be protected, blockage is avoided, and the stability and smoothness of vertical sliding of the blocking plate during desilting after debris flow ends are better guaranteed.

The invention provides an ecological management method for the situation that a debris flow channel is provided with a blocking dam and is in a full storage state. The method comprises the steps that a fish scale-shaped blocking body is arranged on the upstream of a blocking dam, a vertical columnar pit is dug behind the blocking body, straw is laid on the two sides and the bottom of the pit, degradable sponge is laid on the straw, then in-situ soil and organic fertilizer are mixed according to the proportion of 4: 1 and filled into the columnar pit, and after corresponding trees are planted, the mixture is treaded tightly and fully watered. The method has the advantages that the problem that the trees are impacted by random diversion of braid flow under the state that the debris flow channel is full is solved, meanwhile, the trees are indirectly irrigated through water flow, loss of soil in loose deposits is reduced, the survival rate of the trees is increased, healthy and strong growth of the trees is guaranteed, and therefore the loose deposits are better fixed; and complementation with geotechnical engineering is formed, and the positive influence on treatment of the debris flow channel is generated.

The invention relates to a circulating water tank device for simulating the regulation and control effect of a silt dam on water and sediment and a test method. The device comprises a glass water tank, and the glass water tank comprises a tank body, a steel framework and a fixed end base; the tank body is of a box-shaped structure with an upper opening; tempered glass is embedded in the two sides of the steel framework, and a glass bottom plate is embedded in the bottom of the groove body; the model dam is a silt dam model pasted in a glass water tank through glass cement, and a water inlet and a water outlet torrent groove are formed in the two ends of the glass water tank. The lifter is fixed at the bottom of the glass water tank to adjust the gradient of the water tank; the orifice box is fixed above the glass water tank through a supporting device; and the supporting device is mounted above a water inlet close to the glass water tank. The model dam is arranged in the water tank, the corresponding monitoring instruments are arranged, the regulation and control effect of the silt dam on the water and sediment process is monitored by controlling the water flow rate and the sediment content, and technical support is provided for research on the water and sediment mechanism of the silt dam.

This invention relates to the field of soil and water conservation technology, and provides a portable gully retainer and its deployment method for shallow gully management. The portable gully retainer includes a transverse retaining wall, a stilling basin, and protective wing walls. The transverse retaining wall is positioned horizontally along the width of the shallow gully and has an overflow outlet. The stilling basin is located downstream of the transverse retaining wall, with a gradient arrangement between the stilling basin and the overflow outlet. The protective wing walls are located at the end of the stilling basin furthest from the transverse retaining wall, and are angled to the flow direction of the shallow gully. The transverse retaining wall, stilling basin, and protective wing walls are connected to form a turbulent flow channel, which slows down the water flow velocity and controls the flow direction within the shallow gully. This invention effectively intercepts sediment, controls gully slope expansion and gully bottom erosion, is easy to assemble and disassemble, is reusable, and its deployment location and insertion depth can be dynamically adjusted according to the sediment deposition depth without affecting mechanized farming, fundamentally solving the problem of shallow gully management in black soil areas.

The utility model relates to the field of water conservancy and hydropower facilities, especially to a water and mud flow prevention and control system of hydropower station ditch, which realizes the cooperative prevention and control of ditch water and mud flow between adjacent branch ditches, comprising a first branch ditch, a first check dam and a first water dam are sequentially arranged along the water flow direction of the first branch ditch; comprising a second branch ditch, a second check dam and a second water dam are sequentially arranged along the water flow direction of the second branch ditch; comprising a first drainage hole, the first water inlet of the first drainage hole is arranged between the first check dam and the first water dam, and the first water outlet of the first drainage hole is arranged between the second check dam and the second water dam; comprising a second drainage hole, the second water inlet of the second drainage hole is arranged between the second check dam and the second water dam, and the second water outlet of the second drainage hole is communicated with a downstream river channel. The utility model is especially suitable for the hydropower station ditch management engineering in high mountain and valley area.

The invention relates to the technical field of water resource environmental engineering, in particular to a check dam sludge storage device which comprises a plurality of check dams sequentially arranged on a hillside and used for intercepting water and sludge flowing down from the hillside layer by layer. Each check dam comprises a check dam wall and a sludge storage device; a drain hole is formed in the check dam wall, and the sludge storage device is used for controlling opening and closing of the drain hole; in the initial state, the drain holes are in an open state, when sludge and water are accumulated below the check dam wall, the drain holes in the open state are used for enabling water on the upper layer to flow out, and when the sludge on the lower layer is accumulated to reach the lower edges of the drain holes, the sludge storage device blocks the drain holes, so that the drain holes are closed, and the sludge and the water are prevented from flowing out. The drain holes of the check dam wall are controlled by the sludge storage device to be opened or blocked according to the stacking height of the sludge, the sludge and water are effectively prevented from flowing out continuously, drainage is guaranteed, and flowing of the sludge is controlled.

The utility model belongs to the technical field of flood prevention devices, and particularly relates to a novel water conservancy project flood prevention device which comprises two installation frames which are oppositely arranged and used for installing grid baffles, the grid baffles comprise a male grid baffle and a female grid baffle, and a locking assembly is arranged between the male grid baffle and the female grid baffle. And a sealing piece which is matched with the locking assembly to increase the fitting degree of the splicing position of the male grid baffle and the female grid baffle is further arranged between the male grid baffle and the female grid baffle. The locking assembly is arranged between the male grid baffle and the female grid baffle, close connection between the adjacent grid baffles is ensured through the design, the fitting degree between the two baffles can be enhanced by applying external force to the female grid baffle, water flow permeation is effectively prevented, the flood prevention effect is enhanced, besides the locking assembly, the sealing piece is further arranged, and the sealing piece is not prone to falling off. According to the flood prevention device, the sealing performance of the splicing positions of the grid baffles is improved, water flow can be effectively prevented from permeating into the flood prevention device through gaps even under the extreme weather condition, and therefore the overall efficiency of the flood prevention device is guaranteed.

The present application relates to the field of intelligent water conservancy and automation control technology, in particular to a polder multi-site water conservancy data real-time acquisition and intelligent fusion processing method and system, comprising: a multi-dimensional acquisition system construction step: collecting time sequence state, fluid field and environmental boundary data and performing time base unification cleaning; an ideal model construction step: constructing an ideal water tank model based on the law of conservation of mass and generating an ideal water level change curve; a parameter injection simulation step: injecting efficiency attenuation and medium leakage parameters to generate a simulation fault water level curve; a double-track difference calculation step: differentiating the measured and simulation data from the ideal curve to generate real and theoretical residual vectors; a similarity determination and control step: calculating sequence similarity to determine real physical faults or sensor data noise, and generating fusion control instructions; the present application effectively solves the technical pain point of distinguishing between sensor noise and real physical faults, avoiding false positives or false negatives.

The invention discloses a soil check dam construction method based on geopolymer solidified shield muck. The soil check dam construction method comprises the following steps: 1) slope cutting: I, performing slope cutting and leveling on upstream and downstream ditch slopes of a check dam to be built; iI, chiseling or washing the ditch bottom along the axis of the dam, and removing topsoil and sludge; iII, a shallow key groove is dug in the ditch bottom position and used as a guide groove and an anchor; iV, if the slopes on the two sides of the ditch bank are loose or the water flow scouring is strong, shallow lug grooves can be excavated similarly, anchor rods are matched for anchoring, bed rock is stabilized or undisturbed soil is compacted, and side grooves can not be formed; (2) forming is conducted, specifically, a simple formwork or an in-situ soil formwork is arranged in a guide groove, flowing geopolymer is poured in a layered mode to solidify shield muck slurry, and vibration and exhaust are conducted in a segmented mode till the check dam reaches the designed height; the anchor rods are arranged along the upstream slope and the downstream slope, and the geopolymer slurry is sprayed twice in a wet mode after the steel wire mesh is hung. The method can effectively replace a traditional multilayer soil filling and deep groove excavation process, and consumption of natural gravel and cement is reduced.

The utility model discloses a simple artificial fish habitat system suitable for a tidal river channel, which is characterized in that a pit is arranged on a riverbed of the tidal river channel as a main body, and a water inlet and a water outlet of the pit are respectively provided with a stepped retaining dam; compacting the bottoms of the pits, laying clay on the bottoms and side walls of the pits, and arranging natural stones on the surfaces of the clay; a water area corresponding to the bottom of the pit is a deep water area for planting submerged plants; the water area corresponding to the side wall of the pit is a shallow water area, and shallow water plants are planted; the cement block stone wall of the stepped retaining dam is vertically inserted into a riverbed to be fixed and is higher than the riverbed; the natural stones are arranged at the top end and on the two sides of the cement block stone wall, and the gravel is arranged between the natural stones. The device can effectively capture and store water during water recession, and ensures that aquatic organisms have enough inhabiting space during tidal variation.

The present application relates to the technical field of highway drainage facilities, and discloses a ditch type evaporation pond and a construction method, which comprises a ditch, the ditch is widened on the side away from the roadbed to form a ditch type evaporation pond, grass planting bricks are laid on the inner bottom surface of the ditch type evaporation pond and the side away from the roadbed, the grass planting bricks are provided with holes to enhance the underwater infiltration capacity, a check dam is arranged in the ditch type evaporation pond at intervals along the length direction at a certain distance, and inspection steps are arranged on the water inlet side of the check dam; the original ditch is modified, the side slope of the ditch away from the roadbed is excavated, the original ditch is widened, the ditch is fully utilized, and compared with separately arranging an evaporation pond, the newly added land occupation is reduced; the original ditch position can be directly modified, the land occupation line of the ditch type evaporation pond is linear, continuous and smooth, has little influence on local land planning, has a wide application range, and can be used in the setting of the ditch road section regardless of the terrain.

The present application relates to the technical field of intelligent monitoring, and more particularly to a kind of silt dam water and soil loss intelligent monitoring method.The content includes: obtaining original sound wave propagation response signal, and superimposed to obtain full-band superimposed response field;Full-band superimposed response field is corrected, and the propagation field after correction is obtained;Based on the propagation field after correction, structural identification processing is carried out, and the structural reconstruction field is constructed;From the propagation field after correction, structural change characteristics are extracted, and risk assessment is carried out, to obtain risk trend score;Based on the structural reconstruction field, risk trend score and the propagation field after correction, dam structure health state integral score is calculated, and intelligent monitoring is carried out.The problem that traditional water and soil loss monitoring method is difficult to identify dam internal water and soil loss, cavity formation, leakage channel development and other hidden structural abnormal phenomena caused by water seepage, structural fatigue, soil loosening and other factors in the process of silt dam long-term operation, resulting in high false alarm rate and response lag is solved.

The application discloses a method for evaluating the sensitivity of water yield of a dam-controlled watershed to wind-solar complementation, and specifically comprises the following steps: defining a research period, collecting relevant data of the dam and meteorological stations inside and around the research area in the period; calculating the daily solar radiation and wind energy of each meteorological station; extracting the annual wind-solar resource complementation rate of the dam; selecting the optimal theoretical marginal distribution function; constructing a joint distribution function between the two by using a Copula function, constructing a conditional probability model, and calculating the probability of different levels of water yield under different wind-solar resource complementation rates of each dam; and finally, quantifying the sensitivity of different levels of water yield to wind-solar complementation by using a linear regression model. The application can accurately quantify the sensitivity of water yield of a dam-controlled watershed with different spatial distributions to wind-solar resource complementation, and can provide clean energy utilization strategies and technical support for the sustainable use of local dam water resources.

The invention relates to the technical field of debris flow silt arresters, in particular to a mortar masonry debris flow silt arrester repairing and reinforcing device which comprises a dam body, a plurality of steel bars are arranged in a damaged area of the dam body in the vertical direction and the transverse direction of the dam body, and steel bar connectors and connecting sleeves are arranged at the ends, close to the steel bar connecting positions, of the steel bars. A plurality of sliding grooves close to the two sides of the connecting sleeve are formed in the inner wall of the connecting sleeve in the circumferential direction of the connecting sleeve, wedge-shaped blocks are arranged in the sliding grooves in a sliding fit mode, the inclined faces of the wedge-shaped blocks correspond to the threaded inclined faces of the steel bars, springs are fixedly connected to the inner walls of the sliding grooves, and the other ends of the springs are fixedly connected with the corresponding wedge-shaped blocks. The wedge-shaped blocks are provided with unlocking assemblies used for relieving locking of the reinforcing steel bars by the wedge-shaped blocks. The wedge-shaped blocks with the springs are arranged on the inner walls of the steel bar connecting sleeves, mechanical self-locking is formed by the slopes of the wedge-shaped blocks and the threaded slopes of the steel bars, steel bar connection looseness caused by debris flow impact is prevented, and therefore the overall stability of the repaired mortar masonry silt arrester is improved.

The utility model discloses a gabion ecological stone check dam river channel slope protection structure, it includes: river channel slope body, the front side of river channel slope body is provided with gabion net, the inside of gabion net is filled with slope protection stone, the front side bottom end of river channel slope body is fixedly connected with the limiting convex strip, the inner wall of limiting convex strip and gabion net resist and cooperate, the bottom of gabion net's front side both ends are all seted up with the mounting groove, the inside of mounting groove and the middle part of gabion net all are penetrated and have the installation square peg, one end of installation square peg is fixedly connected with the sharp cone head, sharp cone head and river channel slope body plug -in cooperation. Through the lateral limiting sharp cone plate of moving horizontal plate in the pushing process through the rotation effect can extend the open slot, after extending again the lateral limiting sharp cone plate is provided with a plurality of barbs, can with the internal soil structure of river channel slope body increase barb fixed effect, cooperate with the installation square peg, increase firm and stability, not easy to separate.

The application relates to the technical field of water conservancy projects and disaster prevention and reduction, and discloses a method for calculating flood evolution after a silt dam system is breached, which comprises the following steps: firstly, a numerical model containing hydrodynamics, non-equilibrium sediment transport and riverbed deformation is constructed; in the evolution calculation, the water flow and sediment equations are solved simultaneously, the riverbed elevation is updated in real time according to the scouring and silting depth, and the fluid density and viscosity coefficient are dynamically corrected according to the sediment concentration, so that the water-sediment-bed two-way coupling is realized; for the cascade dam system, the silting volume of the upstream incoming sediment in the downstream reservoir area is calculated, the reservoir water level rise caused by the reservoir capacity occupation is quantified, and the cascade failure risk of the downstream dam body is determined; finally, the comprehensive risk distribution based on the mixed fluid kinetic energy is output. The application can objectively reflect the remolding effect of high-sediment flood on the terrain and the change of the fluid physical properties caused by the sediment, and improves the prediction accuracy of the evolution speed, the inundation range and the disaster-causing intensity of the flood caused by the chain breaching of the silt dam system.

The invention relates to the technical field of coal gangue materials, in particular to a composite material utilizing coal gangue, a preparation method and application of the composite material in check dam, and the preparation method comprises the following steps: uniformly mixing raw materials at the mixing rotating speed of 550-750r / min for 1 hour to obtain the composite material utilizing the coal gangue. According to the composite material utilizing the coal gangue, the Portland cement, the aggregate, the aggregate and the water reducing agent are mutually blended, meanwhile, the modified coal gangue agent and the modified calcium sulfate whisker agent are added for mutual coordination and joint synergism, and the prepared composite material product has excellent mechanical strength, abrasion resistance and permeability resistance; and the product has remarkable freeze-thaw resistance and acid and alkali resistance stability effects.

This invention relates to an experimental device for observing the movement of debris flows that can be autonomously adjusted. The device includes a flume model and a support assembly. The flume model is tilted downwards and has an overflow outlet at its bottom. The support assembly includes a support frame, multiple sliding rods, and multiple impact pressure detection devices. The support frame is positioned in the area indicated by the downward tilt of the flume model. The multiple sliding rods are arranged parallel to the support frame and are slidably connected to the support frame along directions close to or away from the overflow outlet. Each sliding rod is equipped with multiple impact pressure detection devices. The debris flow is discharged through the overflow outlet of the flume model and impacts the multiple sliding rods of the support frame. The device allows observation of the horizontal projection distance of the debris flow, the lateral width and longitudinal length of the discharge, and also allows monitoring of the spatiotemporal distribution characteristics of the impact pressure during debris flow discharge using multiple impact pressure detection devices arranged on the sliding rods. This provides convenient conditions for the quantitative calculation of the movement characteristic parameters of debris flows after passing through the overflow outlet of a check dam.

The utility model relates to a check dam with a soil gravel film bag structure, and relates to the technical field of erosion gully treatment. Comprising a plurality of soil gravel film bag structure bodies which are arranged in a triangular shape; the soil gravel film bag structure body comprises a polyester composite ecological net, the polyester composite ecological net is filled with a composite soil gravel film bag, a grating grass seed cover is arranged at the top of the composite soil gravel film bag, and non-woven fabric is arranged at the bottom of the composite soil gravel film bag. The check dam fully solves some problems existing in an existing check dam, and has the advantages of being ecological, environmentally friendly, stable in structure, high in cost performance and the like.