79 results about "Ground water flow" patented technology

The invention is applicable to the technical field of underground water level monitoring and sampling, and provides an underground water level monitoring and sampling device for hydraulic engineering, which comprises a base, the base is rotatably connected with a plurality of adjustable supporting assemblies for supporting and limiting, the upper end face of the base is provided with a winding mechanism, and the winding mechanism is wound with a pull rope. A sampling barrel is fixedly arranged at one end of the pull rope, the winding mechanism is connected with a movable limiting assembly, and the movable limiting assembly can limit the pull rope in the horizontal direction; the device further comprises a falling speed optimization system which can regulate and control the falling speed of the sampling barrel. Under the interference of multiple factors such as wind speed sudden change, underground water flow velocity fluctuation and pull rope elasticity mismatching, the rotating speed of the winding mechanism can be dynamically adjusted, sampling barrel swinging and track deviation are restrained, meanwhile, mechanical damage caused by sudden change of the rotating speed is avoided, and the sampling efficiency and data reliability are improved.

A smart dewatering and water stopping method for a foundation pit, the method comprising the following steps: step S1, dewatering: arranging a plurality of dewatering wells, arranging dewatering water pumps, and lowering a water level in each dewatering well to a preset position by means of each dewatering water pump; step S2, drainage: arranging water collection systems, and draining water from inside a foundation pit by means of the water collection systems; step 3, water blocking: arranging an underground water blocking barrier to prevent underground water outside the foundation pit from flowing into the foundation pit; step S4, water cut-off: arranging a water blocking wall to block water-layer interflow between the interior of the foundation pit and the exterior of the foundation pit; and step S5, performing well water level monitoring, and starting an emergency measure: when a water level exceeds a preset safety range or a stability index of the foundation pit is reduced, starting an automatic emergency measure system. In the present application, for underground water control, the automatic emergency measure system is used to achieve the aims of smart dewatering and water stopping of the foundation pit.

The invention provides a retaining wall drainage system and a construction method, and belongs to the technical field of building construction. The lower water interception system comprises a concrete cushion layer for providing stable support, and a high-quality clay layer and a rigid waterproof layer are laid on the concrete cushion layer; the middle drainage system comprises an inverted filter arranged on the back face of the retaining wall body, the inverted filter adopts welded reinforcement cages as an outer frame, the reinforcement cages are connected through spiral bars, sand and pebbles are filled in the reinforcement cages, the inverted filter is fixedly connected with the back face of the retaining wall body through embedded bars, and a set of evenly-distributed drainage holes penetrating through the wall body are formed in the inverted filter. A drainage ditch is arranged at the front bottom of the retaining wall body; the upper water retaining system comprises a concrete coping and a water stop ridge which are arranged at the top of the retaining wall body; the functions of intercepting water, rapidly draining water and intercepting ground water flow can be achieved, the filtering effect is improved, the construction difficulty is reduced, the stability is enhanced, and rapid drainage is achieved.

The invention discloses an underground water flowing property detection device and detection method in the technical field of underground water detection, the underground water flowing property detection device comprises a controller, the controller is electrically connected with a communication assembly, the communication assembly is fixedly connected with a pressed assembly used for collecting impact force when underground water flows, and the bottom of the pressed assembly is detachably connected with a stabilizing assembly; the compression assembly comprises a hollow body, the outer surface of the hollow body is sleeved with an elastic layer, a sliding cavity is formed between the elastic layer and the hollow body, a plurality of moving rods are evenly and slidably matched with the hollow body, one ends of the moving rods are fixedly connected with the elastic layer, and the other ends of the moving rods extend to the hollow part of the hollow body. The moving rods are annularly sleeved with springs located in the sliding cavities. Signal assemblies are arranged at the sliding connection positions of the moving rods and the hollow body. The underground water flow velocity is detected by detecting the impact force of water flow on the elastic layer, and the impact of hard objects such as stones on the device is reduced by using the elastic layer and other parts.

A groundwater heat exchanger includes a distributor, a collector, a plurality of heat exchange pipes, and a housing. The distributor includes a first interior chamber and a first port. The collector includes a second interior chamber and a second port. Each heat exchange pipe includes a first end attached to the distributor and a second end attached to the collector, and defines a fluid passageway between the first and second interior chambers. The housing surrounds the heat exchange pipes and defines a groundwater passageway along the heat exchange pipes that is configured to receive a groundwater flow. In one example, a loop fluid flow received at the first port flows into the first interior chamber, then flows from the first interior chamber to the second interior chamber through the plurality of heat exchange pipes, and flows from the second interior chamber out the second port.

The invention discloses a device for testing a PRB (permeable reactive barrier) filled with a novel material, and relates to the technical field of permeable reactive barrier testing. The driving bin is fixed on one side of the base, and a driving cylinder body is fixed in the driving bin; the fixing plate is fixed to the upper end face of the base and arranged on the side, close to the driving bin, of the base. The bottom plate is fixed to the upper end face of the base and located on one side of the fixing plate, and an adjusting cylinder body is fixed in the bottom plate; the at least two supporting pieces are fixed on the bottom plate; the adjusting assembly is fixed to the side, away from the driving bin, of the fixing plate; the adjusting bin is fixed to the side, away from the fixing plate, of the adjusting assembly and is fixed through one supporting piece, and two sets of conversion grooves are symmetrically formed in the inner wall of the adjusting bin; the drainage bin is arranged on the other supporting piece in a sliding mode and located on the side, away from the adjusting assembly, of the adjusting bin; the clamping assembly is mounted on the drainage bin; the actual condition of underground water flowing can be accurately simulated, and the simulation accuracy is improved.

A three-dimensional heterogeneous aquifer horizontal equivalent permeability coefficient multi-scale prediction method based on a residual network comprises the steps that a foundation pit dewatering two-dimensional pressure-bearing steady flow model is constructed, the influence of the size of a lenticular body on foundation pit dewatering flow field disturbance is evaluated, and the resolution ratio of a parameter prediction model grid is determined; based on actual drilling data and transition probability / Markov chain T-Progs, according to multiple deposition types formed by a binary deposition structure, a multi-layer aquifer structure, a coarse-grained deposition structure and a fine-grained deposition structure, a three-dimensional stratigraphic random structure model set is constructed, and three-dimensional stratigraphic section random slices are established; obtaining horizontal equivalent permeability coefficients corresponding to stratigraphic sections in various stratigraphic structures based on the underground water flow numerical model FloPy, and establishing a stratigraphic structure-equivalent permeability coefficient training set based on a neural network; a deep learning model is constructed based on the residual network ResNet50; and training, verifying and testing the equivalent permeability coefficient of the stratum section formed by the binary sedimentary structure, the multi-layer aquifer structure, the coarse grain sedimentary structure and the fine grain sedimentary structure.

The invention provides an oxidation active zone remediation system and method for underground water organic pollution. The remediation system comprises a plurality of injection wells and monitoring wells which are arranged at the downstream of an underground water pollution plume; the injection wells are distributed in rows at equal intervals in the direction perpendicular to the underground water flow field, the adjacent injection wells in the same row are distributed at equal intervals, and the injection wells in the adjacent rows are distributed in a staggered mode. The monitoring wells are arranged at upstream and downstream positions of an oxidation active zone formed by the injection wells; the injection well is of a double-well structure and comprises an inner well and an outer well. The inner well and the outer well are slotted floral tubes, a repairing agent is injected into the inner well, and the space between the inner well and the outer well is filled with a slow-release repairing material; and the outer side of the outer well is provided with a well wall formed by filling quartz sand filter materials, sodium bentonite particles and anti-seepage cement paste from bottom to top. According to the remediation system, through the reasonable structural design and application of the remediation agent and the slow-release remediation material, an oxidation activity reaction zone can be rapidly established, underground water pollution diffusion is efficiently blocked, and rapid and effective remediation of underground water is achieved.

The invention discloses an intelligent underground water quality monitoring device and method, and relates to the technical field of water quality monitoring, the intelligent underground water quality monitoring device comprises a shell and a draw-off pump, a connecting column is mounted on the draw-off pump, and a supporting assembly is arranged on the outer side of the connecting column; the supporting assembly comprises a sleeve shell, an electric push rod, a movable ring, a sliding block, a supporting rod, a limiting rod and a contact block, the sleeve shell is installed on the outer side of the connecting column, and the electric push rod is installed on the outer surface of the sleeve shell through a support. The contact block extrudes the inner wall of the vertical shaft, the device is stably fixed in the vertical shaft and adapts to vertical shafts of different sizes, data accuracy and stability are guaranteed, meanwhile, the connecting column and the sleeve shell are matched through the rotating ring, the first spring and the fixing bead, flexible rotation can be achieved, the direction of the draw-off pump can be adjusted according to the underground water flow direction, the turbofan directly faces the water flow, and the flow speed monitoring accuracy is improved.

The invention discloses an automatic pressure relief reinforced concrete inner-layer well wall which is characterized in that an outer-layer well wall and an inner-layer well wall are sequentially arranged on the well wall of a shaft from outside to inside, a water guide steel pipe is arranged in the inner-layer well wall, and the water inlet end of the water guide steel pipe extends towards the outer-layer well wall and is communicated with underground water fluid; the drainage end of the water guide steel pipe extends towards the well bottom and penetrates out of the inner side face of the inner-layer well wall, and the water inlet end of the water guide steel pipe is connected with a water inlet control valve through a water collecting box and communicated with underground water fluid through the water inlet control valve. By arranging the water guide steel pipe, water is drained to the lower portion of a water-rich stratum, water flow is effectively guided out of a shaft, the water pressure borne by the inner-layer well wall is relieved, the inner-layer well wall is prevented from being fractured and fractured due to the fact that the water pressure external load is reduced, the inner-layer well wall can be designed to be thinner, the requirement for the material strength is lowered, and the service life of the inner-layer well wall is prolonged. And building materials are saved, and the construction cost is reduced.

The application provides a method for determining inflow hydrograph of urban stormwater inlet, which is in line with actual urban runoff conditions and can effectively reduce the error of calculation results. The urban area is divided into multiple sub-regions according to the road network, and the net rainfall is discharged from the stormwater inlet, and the single stormwater inlet in the sub-region is calculated respectively; the urban surface runoff is calculated by using the comprehensive runoff coefficient method, and the runoff coefficient not greater than 1 is used to represent the runoff after the rainfall is intercepted and lost on the ground; for the rainfall in the small urban area, the ground water flow is in the form of slope flow and shallow concentrated flow; the catchment time is the sum of the two, the slope flow with a flow line not greater than 90m is calculated by using the Manning dynamics method to calculate the surface runoff flow time; after the slope flow stops flowing for 90m, the shallow concentrated flow with a water depth greater than 3cm appears at this time, and the stormwater inlet design flow inflow calculation formula is: Q = F * (P - S) / (T + 90) wherein Q is the stormwater inlet inflow, L / min; F is the average catchment area controlled by each stormwater inlet, m 2 .

The present invention discloses a method for obtaining the tortuosity and permeability of a porous medium based on a rectangular particle model. For rectangular porous medium particles, a microscopic structure model is established by a fractal method, which can be used to obtain the tortuosity, permeability and capillary entry pressure of a porous medium composed of rectangular particles with different shape parameters. By establishing a microscopic structure model of a porous medium composed of rectangular particles, this method realizes the quantification of the water flow movement parameters of the porous medium, is suitable for simulating and predicting the migration of chlorinated hydrocarbon pollutants in an aquifer, and can realize the identification of the particle shape parameters of the aquifer, and has wide applicability to the accurate simulation of groundwater flow movement and pollutant migration and remediation.

This invention provides a water-stopping device, relating to the field of building waterproofing technology. The water-stopping device includes a water-stopping steel plate and a drain pipe arranged along the length of the water-stopping steel plate. The drain pipe has a drain outlet along its length, allowing groundwater that has seeped onto the upper surface of the water-stopping steel plate to flow into the drain outlet. By installing this water-stopping device, the water-stopping steel plate can be used to seal the interface joint between pre- and post-cast concrete. If the water-stopping steel plate fails to stop the water flow, and the seeping groundwater flows from the interface joint between the water-stopping steel plate and the concrete to the upper surface of the water-stopping steel plate, the seeping groundwater will flow into the drain pipe through the drain outlet and then into a nearby sump. This prevents groundwater seeping through the concrete interface joint from leaking onto the basement floor surface, making the water-stopping device an integrated blocking and draining system with multiple lines of water-stopping defense, significantly improving the water-stopping effect at the post-cast concrete joint.

The invention discloses an underwater crack grouting retention rate testing device, and relates to the field of grouting retention rate test.The underwater crack grouting retention rate testing device comprises a supporting assembly and a testing table top fixed to the supporting assembly, a testing box, a water supply box and a grouting box are arranged on the testing table top, and the water supply box is located on the side face of the testing box and communicates with the testing box through a water inlet pipeline; the other side of the testing box is connected with a purified water tank through a drainage pipeline, the purified water tank is communicated with the water supply tank through a water return pipeline, the grouting box is connected with the height adjusting assembly, the side face of the grouting box is connected with a grouting pipe, and the tail end of the grouting pipe is located at the testing box. (1) the height of the grouting box is adjusted through the height adjusting assembly, so that the grouting pressure is adjusted, and the retention rate under different grouting pressures can be met; (2) simulating the underground water flowing condition through a water inlet pump, and adjusting the height of the model to meet the retention rate under different underground water level conditions; and (3) recycling of water is realized by arranging a purification water tank, and the utilization rate of water resources is improved.

The present invention relates to a construction method for a water-stop curtain of a triaxial cement-soil mixing pile in a pebble layer, which includes the steps of: S1. Extend the drill pipe of the long auger drill above the position of the first retaining pile point, confirm the perpendicularity of the drill pipe, and ensure that the hole-forming perpendicularity meets the design specifications and requirements; S2. Sequentially form holes downward to the top position of the pebble layer, the bottom position of the pebble layer, and the target position 0.5 m below the designed elevation of the curtain through the long auger drill; and dump soil respectively when reaching the top position, the bottom position, and the target position; the long auger drill withdraws from this retaining pile point and conducts hole-forming operations for the next retaining pile point; S3. Backfill the drill cuttings formed by the first soil dumping into the pile hole until reaching the top position of the pebble layer. This avoids the subsequent situations of the triaxial mixing pile machine getting stuck, buried, or unable to drill down, and can solve the problem that some pebbles cause the collapse of the hole wall and accumulation at the bottom of the hole due to groundwater flow after hole formation, resulting in insufficient length of the triaxial pile formation.

The invention discloses an underground water seepage monitoring device which comprises a shell, a heating piece, a heat conduction cylinder, a first temperature sensor, a water flow measuring block, a connecting rod and a control terminal. The heat conduction cylinder is located on the lower side of the heating piece and provided with a measuring position corresponding to the heating piece and close to one end of the heat conduction cylinder in the first direction so as to divide the heat conduction cylinder into a first heat conduction part and a second heat conduction part, the length of the first heat conduction part is larger than that of the second heat conduction part, and the heat conduction cylinder can move up and down relative to the heating piece. The first temperature sensor is arranged on the heat conduction cylinder and corresponds to the measuring position; the water flow measuring block is located outside the shell, is in a rectangular pyramid shape or a quadrangular frustum pyramid shape, is provided with a top end and a bottom end in the first direction and can rotate around the axis of the water flow measuring block. The connecting rod is connected with the heat conducting cylinder and the water flow measuring block, and the first heat conducting part corresponds to the top end; the control terminal is electrically connected with the heating piece and the first temperature sensor; the underground water flow direction and flow velocity can be automatically monitored in situ in real time for a long time, the operation is simple, and the cost is low.

The invention relates to a karst collapse multi-modal early warning method and system based on a space-time fusion attention mechanism, and aims to realize accurate prediction and early warning of a stratum collapse risk through multi-modal data fusion and the space-time fusion attention mechanism. According to the method, firstly, multi-modal data such as horizontal strain, vibration, stratum settlement displacement and underground water flow velocity are collected through a horizontal measuring pipe and a vertical drill hole, and space and time characteristic tensors are constructed; then, a space-time fusion attention mechanism is adopted to distribute weights for different space positions and time points so as to highlight areas and moments which have great influence on the stratum collapse risk; the model extracts space and time features through CNN and LSTM, comprehensively analyzes the risk contribution of environment, stratum structure and physical perception data through a risk operator, and finally generates a risk early warning signal. The method can monitor the change of the stratum in real time and generate early warning, and has the advantages of multi-modal data fusion, space-time weight dynamic adjustment, accurate risk assessment and the like.

A groundwater heat exchanger includes a plurality of heat exchange pipes, a housing and a cable channel. Each of the heat exchange pipes is configured to receive a loop fluid flow. The housing has an interior chamber that contains the heat exchange pipes and defines a groundwater passageway that is configured to receive a groundwater flow. The cable channel is formed on an exterior of the housing and extends along a central axis of the housing. The cable channel includes at least one cable pathway configured to receive one or more cables.

The present invention discloses an air pressure detection device and an aquifer air pressure detection method, and relates to the field of air pressure detection equipment. The present invention includes an intelligent controller, an air pressure detection sensor, and a wire. The air pressure detection sensor is connected to the intelligent controller via the wire, and also includes a reeling and unreeling mechanism and an unreeling length detection mechanism. The reeling and unreeling mechanism can reel or unreel the wire, and the unreeling length detection mechanism can detect the unreeling length of the wire. By detecting the air pressure of the underground aquifer, data support is provided for the aeration construction of the underground aquifer, which is conducive to accurately controlling the aeration volume and preventing the aquifer from being overly high in air pressure, thereby disturbing the groundwater flow field or causing gas channeling and damaging the underground aquifer environment. Moreover, through the cooperation of the air pressure detection sensor, the linear velocity sensor, the intelligent controller, and the reeling and unreeling mechanism, the air pressure at different depths in the underground aquifer can be detected, and the depth information can be accurately matched with the air pressure information, thereby improving the air pressure detection accuracy of the underground aquifer.

The utility model discloses a pipe jacking machine hole water stopping device and a pipe jacking machine, and relates to the technical field of pipe jacking construction. The pipe jacking machine hole water stopping equipment comprises a water stopping sleeve, the water stopping sleeve comprises a flared pipe section and a cylindrical pipe section, the flared pipe section is in butt joint with the cylindrical pipe section, the cylindrical pipe section is provided with a first elastic blocking piece, the flared pipe section is provided with a baffle, the baffle is provided with a second elastic blocking piece, and a storage cavity is formed between the flared pipe section and a jacking pipe. A squeezing cavity is formed between the cylindrical pipe section and the jacking pipe, and the material storage cavity is filled with a blocking water stop material which is brought into the squeezing cavity by the jacked jacking pipe to be continuously compacted. The pipe jacking machine comprises the pipe jacking machine hole water stopping equipment and further comprises a cutter head penetrating through the water stopping sleeve. The pipe jacking machine hole water stopping equipment and the pipe jacking machine form a first sealing structure through the first elastic blocking piece, the water stopping sleeve, the baffle and the second elastic blocking piece form a second sealing structure, and the pipe jacking machine hole water stopping equipment has the advantages that the sealing effect is good, and silty sand, mud or underground water is prevented from flowing into a construction well.

The utility model relates to a waterproof flow guide blind ditch structure at the connecting place of diaphragm wall, it includes flow guide blind ditch main part, flow guide blind ditch main part sets up at the connecting place of diaphragm wall, is used for guiding the ground water flow, prevents the ground water and accumulates at the connecting place, the utility model discloses a flow guide blind ditch is established, effectively guides the ground water flow, prevents the ground water and accumulates at the connecting place, reduces the seepage risk, improves the overall waterproof performance of diaphragm wall, guarantees the engineering quality. The application still has the advantages such as convenient construction, low cost, can satisfy the efficient and economic demand of modern underground engineering construction.

The invention relates to the technical field of site investigation, in particular to a multi-depth stratified sampling well building method which comprises the following steps: S1, drawing a circle on a polluted site, and drawing a first sine curve along the flow direction of underground water of the polluted site; s2, drawing a branch line and a second sine curve along the wave crest or wave trough direction of the first sine curve; s3, well building is carried out with the circle center, the wave crest or wave trough of the first sine curve and the intersection point of the second sine curve and the second x axis as well building point positions, and well building is completed; according to the well building method, the main line is arranged in the underground water flow direction with the circle center of the polluted site as the starting point, the branch lines extend in the vertical direction, a three-dimensional space monitoring network is formed, diffusion paths of pollutants in the main flow direction and the lateral direction can be synchronously tracked, and the well building method is particularly suitable for accurate description of pollution plumes in a heterogeneous aquifer.

The application discloses a mechanism for preventing underground aquifer heat storage medium migration, and relates to the technical field of agricultural facility heating, comprising a heat well and a plurality of stability wells arranged around the heat well in a circumferential direction, the adjacent stability wells are connected through water pipes, the water pipes are filled with water and the air is discharged, the water level in the stability well is higher than that in the high water level area after water injection, and the water outlet at the lower end of the water pipe is always below the ground water level line. The application can reduce heat loss caused by underground water flow of the underground aquifer cross-season heat storage mechanism, and improve the heat storage effect.

The invention relates to an unsaturated water flow and saturated water flow coupling estimation method and system, and the method comprises the steps: building an underground water flow motion analysis model considering the influence of an unsaturated zone, solving the underground water flow motion analysis model, and obtaining an underground water head driven by the fluctuation of a river water level and a river-underground water interaction flux semi-analytical solution; collecting aquifer water level monitoring data of hydrogeological parameters to be estimated, and performing dimensionless processing on water level time sequences of a plurality of monitoring holes in the aquifer water level monitoring data to obtain dimensionless monitoring water level data; fitting wiring is carried out on the semi-analytic solution of the underground water head and the river-underground water interaction flux obtained by the analytic model and actually measured dimensionless monitoring water level data, a fitting curve meeting the set requirement is selected, and a parameter value corresponding to the fitting curve serves as a corresponding hydrogeological parameter estimated value of the aquifer; according to the method, the influence of unsaturated zone water flow is fully considered, so that the analytical model is closer to the actual situation.

The invention discloses an underground water flow direction, speed and mass flow monitoring method. Underground water flow direction logging or hydrological logging is a technical means for obtaining underground water flow information through a drill hole or a monitoring well. An array sensor is located in a well logging; the array sensor comprises a cylindrical shell, a heating body, a temperature sensor and an orientation sensor; the size of the cylindrical shell is the same as that of the inner wall of the logging well; the heating body is arranged at the central position of the cylindrical shell; the bottom surface of the cylindrical shell is uniformly divided into N fan-shaped sub-areas along the circumference by taking the heating body as the center, and each sub-area is provided with a temperature sensor; an orientation sensor is arranged on each temperature sensor and is used for monitoring the azimuth angle of the temperature sensor; data collected by the array sensor is transmitted to the controller, and the flow speed, the water flow direction and the total mass flow rate of water flow are obtained through calculation. According to the invention, the measurement difficulty of a heterogeneous aquifer and a thin aquifer is overcome, and wider and more accurate monitoring of the aquifer environment is realized.

A carbon dioxide storage device (20) comprises: a pressure injection pipe (P1) for pressure injection of liquefied carbon dioxide from above ground into the ground; a pressure injection pump (2) for pressure injection of liquefied carbon dioxide into the pressure injection pipe (P1); a first control valve (3) for adjusting the flow rate of liquefied carbon dioxide flowing in the pressure injection pipe (P1); a first flowmeter (SR1) for measuring the flow rate of liquefied carbon dioxide flowing in the pressure injection pipe (P1); a pumping pipe (P2) for pumping up groundwater from underground to above ground; a second control valve (7) for adjusting the flow rate of the groundwater flowing in the pumping pipe (P2); a second flowmeter (SR2) for measuring the flow rate of a liquid included in the groundwater flowing in the pumping pipe (P2); and a control device (1) for controlling the second control valve 7 so that the flow rate of the liquid measured by the second flowmeter (SR2) increases when the flow rate of the liquefied carbon dioxide measured by the first flowmeter (SR1) is below a predetermined threshold value.

The invention relates to the technical field of water treatment, and discloses an underground water treatment system and a construction method thereof, the treatment system comprises a plurality of biological reaction core devices, and the plurality of biological reaction core devices are arranged under the earth surface; any two pieces of biological reaction core equipment are arranged at intervals; each piece of biological reaction core equipment is filled with a porous core material loaded with microorganisms, micro-nano bubbles and microorganisms in each piece of biological reaction core equipment are diffused outwards, and respective corresponding adsorption and degradation influence areas are formed around each piece of biological reaction core equipment; all the adsorption and degradation influence areas form a continuous biological reaction zone, and underground water flows through the continuous biological reaction zone. As respective corresponding adsorption and degradation influence areas can be formed around each piece of biological reaction core equipment, the biological reaction core equipment which is distributed in a dotted manner can form a continuous biological reaction zone. Furthermore, continuous and long grooves can be prevented from being excavated in the petrochemical enterprise land parcels, so that the safety can be improved.

The application discloses a groundwater sampling flow control system, which comprises an ultrasonic flow detection module, a flow control module, a data processing and storage module, a display module and a portable integrated box. The measurement range of the ultrasonic flow detection module is 0-20 L / min, and the precision control is ±0.1%. The flow rate and flow are calculated by detecting the time difference of the forward and reverse flow propagation of sound in the groundwater fluid. The flow control module cooperates with a sampling pump to realize accurate flow regulation and control. The data processing and storage module can calculate the cumulative flow, store historical data and support USB export. The display module realizes the digital real-time display of the flow rate, cumulative flow, battery capacity and other information. The system realizes accurate control and measurement of the groundwater sampling flow, avoids sample pollution, is portable and easy to operate, can record the well washing state, and meets the national standard requirements for VOC water sample collection.

This utility model discloses a pressure relief and repair structure for cut-off points in basement slabs, comprising a cast-in-place body and a pressure relief mechanism. The cast-in-place body is formed within a cut-off groove in the basement slab. The pressure relief mechanism includes a pressure relief pipe and a filter head. The pressure relief pipe is embedded within the cast-in-place body, with its lower end located below the basement slab and its upper end located above the basement slab. The filter head is positioned at the lower end of the pressure relief pipe. The beneficial effects of this basement slab cut-off point pressure relief and repair structure are: by setting up the pressure relief mechanism, groundwater can be discharged through the pressure relief pipe during the solidification process of the cast-in-place body. This avoids the erosion of the solidifying concrete by groundwater under water pressure, as is common in traditional methods, allowing the concrete to solidify normally, resulting in a denser internal structure and improved basement slab repair effectiveness.

The invention discloses an underground water in-situ remediation data remote monitoring system and method based on a cloud platform. The system comprises the cloud platform, an on-site monitoring host, an in-situ remediation device and a monitoring well. The on-site monitoring host comprises a parameter adjusting module which is used for adjusting the injection duration and the injection flow according to the flow velocity of underground water, adjusting the injection flow according to the rainfall and adjusting the injection flow according to a flow feedback coefficient; the cloud platform comprises a PRB state monitoring module and a feedback adjusting module; the PRB state monitoring module is used for analyzing the state of the reaction area of the PRB according to the monitoring data of the first monitoring well and the second monitoring well; the feedback regulation module is used for generating different feedback regulation strategies according to the number of abnormal reaction areas when particle abnormity exists in the PRB reaction areas. The underground water in-situ remediation system is remotely monitored and controlled, the state of the in-situ remediation system can be obtained at the far end, remediation parameters are adaptively adjusted, and the remediation effect is improved.