95 results about "Ground water flow" patented technology

A lateral pipe lining material comprises a tubular resin-absorbing material impregnated with a curable resin and a brim attached at one end thereof. The lining material is positioned so that the brim faces a peripheral edge of a lateral pipe opening of the main pipe. A ring-shaped gasket composed of an elastic material is attached to an upper surface of the brim, and a bonding resin is applied thereto. The gasket seals a gap between an inner peripheral surface of the main pipe and the brim. The lateral pipe lining material is evertedly inserted into the lateral pipe in a state in which the bonding resin applied to the brim is brought into contact with the inner peripheral surface of the main pipe. In such a configuration, ground water can be prevented from seeping into the bonding resin applied to the brim even if the ground water flows into the main pipe from a break of the lateral pipe.

The invention discloses an urban hydrological simulation system and a simulation method, which relate to the technical field of urban precipitation management. The invention includes a rainfall floodmanagement model, the simulation system includes a time-varying precipitation unit, a surface water evaporation unit, a snow cover and melt unit, a depression interception unit, a soil seepage unit, agroundwater recharge unit, a groundwater and drainage pipe exchange unit, a slope catchment unit, a LID control unit, a region editing unit that are associated with the rainfall flood management model, and the simulation system further comprise a storage module, an aquifer editing module and a groundwater flow editing module. The invention has comprehensive simulation function and can provide comprehensive and representative analysis data through a complete functional system unit structure. The influence of DCIA and TIA setting on runoff generation in urbanization region is analyzed under thepremise of comprehensive consideration of parameters. More objective and accurate reference and opinions are provided for urban planning.

The invention discloses a centralized combustion type in-situ thermal desorption repair device for polluted sites, which comprises combustion heat transfer and waste heat recovery unit, extraction condensation and gas-liquid separation unit, underground water flow control unit, soil gas control unit, waste gas Treatment unit, waste water treatment unit. Combustion heat transfer and waste heat recovery unit includes hot blast stove, air-to-air heat exchanger, blower, induced draft fan, exhaust pipe, and heating well group. The extraction condensing and gas-liquid separation unit includes extraction wells, heat exchange condensing equipment, gas-liquid separation equipment, demister tower, and vacuum pump. The groundwater flow control unit stops the water curtain. The soil gas control unit is a concrete layer. The exhaust gas treatment unit contains adsorption equipment and fans. The wastewater treatment unit includes a regulating tank, a combination tank, sand filter equipment, carbon filter equipment, and a water outlet tank. The centralized combustion type in-situ thermal desorption repairing device for polluted sites provided by the invention can overcome the shortcomings of the prior art and achieve better repairing effects.

The invention discloses a polluted soil and underground water in-situ reaction zone repairing system which comprises a direct-current power supply, an even number of electrode wells, an even number of electrodes and an extraction and treatment system, wherein the electrode wells are arranged in the downstream direction of the underground water flow direction of a pollution source; the bottoms of the electrode wells are positioned on a soil aquifer; electrolyte is formed through permeation of underground water into the electrode wells in the electrode wells; the number of the electrodes is equal to that of the electrode wells; an electrode is inserted in each electrode well; the electrodes are inserted in the bottoms of the electrode wells; the height of each electrode is equal to or greater than the height of the liquid surface of the electrolyte in the corresponding electrode well; half of the electrodes are connected with the anode of the direct-current power supply, and the other half of the electrodes are connected with the cathode of the direct-current power supply; and a pipeline provided with a filter is adopted to extract the electrolyte of each electrode well. The polluted soil and underground water in-situ reaction zone repairing system facilitates interception and concentration of pollutants in underground water and facilitates diffusion and migration of nutrient substances.

The invention relates to a migration transfer characteristic test system of fragments of a reactor containment and a test method thereof. The system comprises a test segment module composed of a waterchannel, a rectifying grid, a filter screen and related equipment, a flow rate adjusting module composed of a water tank, a main water pump, an electric valve and related pipelines and instruments, acooling module composed of a cooling water pump, a heat exchanger, a cooling tower and related pipelines and instruments, a thermotechnical hydraulic parameter measuring module composed of a flowmeter, a temperature sensor, a pressure sensor and a liquidometer, an image collecting module composed of a high-speed camera, a local area network computer and related image processing software, a flow field information collection module composed of PIV equipment, a local area network computer and related flow field processing software and a remote control module composed of a programmable logic controller, a water pump, an electric valve and related equipment. The system simulates a ground water flow velocity field of the containment accurately after loss of coolant accident and acquires characteristic parameters of different fragments migrating in water.

The invention disclosed relates to a method and apparatus for the denitrification of groundwater in situ in an aquifer under substantially anaerobic conditions, the method comprising (a) providing a network, including an extraction well for removal of groundwater from the aquifer and a plurality of injection wells for returning groundwater to the aquifer, the injection wells being arranged in a line substantially perpendicular to the direction of groundwater flow, the extraction well being located downstream or upstream of the line of injection wells, and the spacing of the wells and the number of injection wells being determined by the mathematical relationship <math-cwu id="MATH-US-00001"> <number>1</number> $\begin{array}{cc}J=\frac{C_p+{\mathrm{nC}}_1}{W}\to \min & \left(1\right)\end{array}$ <mathematica-file id="MATHEMATICA-00001" file="US20020020664A1-20020221-M00001.NB"/> <image id="EMI-M00001" wi="216.027" he="18.00225" file="US20020020664A1-20020221-M00001.TIF" imf="TIFF" ti="MF"/> </math-cwu> where J is the cost of treatment, Cp and C1 are the costs of extraction and injection wells, respectively; n is the number of injection wells, and W is the distance across the protected area, and wherein the water stream is evenly distributed between injection wells, according to the relationship: <paragraph lvl="0"><in-line-formula>Fl=Fe/n=const (2) </in-line-formula>where F is the water flow rate (e-extraction well, i-injection well) and n is the number of injection wells, (b) removing groundwater from the aquifer by the extraction well, (c) adding a carbon source to the groundwater in a controlled manner, (d) returning the carbon source amended groundwater to the aquifer by the injection wells in even distribution, the water flow rate being controlled, and (e) monitoring the nitrate concentration of the groundwater removed from the extraction well, a decrease in nitrate concentration being indicative of denitrification.

The invention discloses a method and a device using a home-made small tube well to lower an underground water level. According to the method using the home-made small tube well to lower the underground water level, a water stop ring is formed at the periphery of a foundation ditch through arranging a group of home-made small tube wells at the bottom of the foundation ditch and pumping water in the home-made small tube wells to a drainage ditch in the top of the foundation ditch through a water pump; the underground water near the home-made small tube wells would not permeate into the foundation ditch in short time so that the foundation ditch construction requirements are satisfied. The method and device using the home-made small tube well to lower the underground water level are especially suitable for an engineering featured with small precipitation depth, rich underground water resource, large foundation soil permeation coefficient and large underground water flow rate; the home-made small tube well precipitation system is capable of lowering the underground water level near the well point in short time, when a plurality of tube well precipitation points are used together, the water stop ring is formed at the periphery of the foundation ditch, and the underground water level in the foundation ditch is lowered to the position which meets the construction requirements. The device using the home-made small tube well to lower the underground water level is broad in material source, easy and convenient to process, small in well completion range and obvious in precipitation effect.

The invention discloses an underground water pollution source space comprehensive recognition method applying numerical simulation. The method comprises the steps of 1, boundary generalization; 2, performing interpolation to obtain an initial water head and a bottom plate elevation; 3, determining a source sink item; 4, carrying out permeability coefficient partitioning on the aquifer; 5, establishing an underground water flow model; 6, carrying out model calibration; 7, inverting an underground water flow trace; and 8, recognizing the exact pollution source of the underground water in space. Through application of simulation software, flowing of groundwater flow related to groundwater pollution sources can be represented in a more representative mode, and targeted regionalization research on groundwater pollution sources is facilitated; according to the invention, by tracking the underground water flow trace, the flow trace of underground water with underground water pollution is reversely studied, and the traceability work can be accurately and visually carried out; spatial accurate analysis is carried out through the division of underground running water traces and scenes such as pollution source types, land types and geological conditions on the ground.

The invention discloses a dynamic prediction method for the water inflow of a coal mine working face under the mining disturbance condition. The dynamic prediction method comprises the following stepsof (1) establishing a mine lot underground water flow numerical model in a natural state; (2) determining the rule of influence of different stages of coal mining to the working face on hydrogeological parameters of an aquifer based on the dynamic development characteristics of the water flowing fractures induced by coal mining disturbance; (3) preparing model input files of different mining stages; and (4) compiling a circulating script program, calling the model input files of the different mining stages, and running the program to calculate the water inflow. According to the dynamic prediction method, hydrogeological parameter setting in the underground water model is dynamically adjusted according to the development characteristics of the water flowing fractures under mining disturbance during simulation calculation by compiling the circulating script program, and the dynamic prediction of the water inflow is realized on the basis of reasonable generalization of the dynamic coal mining process and the disturbance effect.

The invention discloses a normal-pressure chemical oxidation injection device for underground water. The normal-pressure chemical oxidation injection device comprises a dispensing tank, a chemical conveying pipe, a chemical injection pump and an injection well, wherein the injection well is arranged in a polluted area, an input port of the chemical injection pump is communicated with the dispensing tank, and an output port of the chemical injection pump is connected to the injection well through the chemical conveying pipe; a flowmeter, a pressure gauge and a valve are arranged on the chemicalconveying pipe; the injection pressure of the chemical injection pump is 0.1-0.2 MPa; the distance between the injection wells is determined according to the underground water flow velocity of the polluted area. According to the technical scheme, the chemical is diffused to cover the polluted area under natural conditions, so that the effect of removing pollutants is achieved, the reaction efficiency is improved, and the undesirable phenomena of uneven chemical diffusion, ground slurry return and the like caused by over-high injection pressure are avoided.

The invention discloses a waterproof construction method in underground engineering. The waterproof construction method is characterized by comprising the following steps: a, performing tunnel excavation, primary support and waterproof base plane treatment after primary support; b, manufacturing a film spraying material; c, spraying the waterproof base plane by adopting a spray film-forming technology; d, performing reinforcing bar engineering construction; e, performing WEYTHIN cellulose fiber concrete stirring; f, performing WEYTHIN cellulose fiber concrete pouring; and g, forming inverted arch, and finishing waterproof construction during underground engineering. Change of ground water flow rule during underground engineering construction and treatment problem of later tunnel water leakage are avoided. The method is applicable to tunnel water prevention of different lining types and open cut pit water prevention, can reduce the damage of the ground water rule to the greatest degree and is particularly used in regions such as surface water body, wellsprings, geological sensitive areas and the like nearby new projects, extension projects and reconstruction projects. Meanwhile, the cost waste and quality problem caused by subsequent water leakage treatment are reduced.

The invention relates to a method for analyzing the effect of an underground water pressure mining scheme based on a GMS, and belongs to the technical field of numerical simulation. According to the method, the hydrogeological conditions, the generalized boundary conditions and the aquifer of a research area are combined, all source and sink items and hydrogeological parameters are determined, the GMS-based groundwater flow model is established, and the model is identified and verified. The pressure mining quantity corresponding to the underground water pressure mining scheme serves as a source sink item to be input into the model, different simulation time and operation models are set, the result is analyzed, and the effect of the underground water pressure mining scheme can be obtained. According to the method, the direct underground water flow field graph under the influence of the underground water pressure mining scheme under different time scales and the underground water resource quantity change value of the research area can be obtained, so that the direct understanding of the effect of the underground water pressure mining scheme is realized.

The invention discloses a dynamic simulation method for recharging underground water by surface water. The method comprises the following steps: equipment assembly: connecting a surface water input unit, an underground water input unit, a discharge unit, a circulation monitoring unit, a river simulation unit, an aeration zone simulation unit and an aquifer simulation unit; underground water flow field simulation: controlling communication between the underground water input unit and the aquifer simulation unit and communication between the discharge unit and the aquifer simulation unit to obtain a stable underground flow field; infiltration simulation: controlling communication between the surface water input unit and the river simulation unit and communication between the discharge unit and the river simulation unit, and obtaining the infiltration amount and the effective recharging amount of the aeration zone; and infiltration monitoring, wherein the circulation monitoring unit monitors the water content or the liquid level height in the aeration zone simulation unit and the water-containing layer simulation unit. Dynamic and three-dimensional monitoring of influence of infiltration water under different runoff conditions of rivers on the groundwater volume is realized.

The invention is applicable to the technical field of clean energy equipment, and provides a method for slowing down the heat interference of an underground water source heat pump. The method for slowing down the heat interference of the underground water source heat pump comprises a heat pump unit communicating with a first hoistway through a first pipeline and communicating with a second hoistway through a second pipeline, and a heat barrier well arranged between the first hoistway and the second hoistway and communicating with the first pipeline or the second pipeline, wherein the heat pumpunit, the first hoistway and the second hoistway communicate with liquid driving equipment; the first hoistway, the second hoistway and the heat barrier well are arranged in an aquifer; the heat pumpunit, the first hoistway, the second hoistway, the heat barrier well and the aquifer form water flow circulation; and the heat barrier well and the heat pump unit divide the water pumping flow, and change the pumped and irrigated groundwater flow field to delay the occurrence of the heat interference. The method for slowing down the heat interference of the underground water source heat pump provided by the invention has the advantages of low investment cost, low interference resistance, convenience in adjustment, high energy utilization rate and convenience in small-field popularization andimplementation.

The invention provides a construction method of an air curtain wall. The construction method specifically comprises the following steps that 1, a plurality of air injection hole units are arranged onthe periphery of the side of a mine pit; 2, an air injection sleeve and an air injection pipe are connected in a welded mode, a pipe opening of the air injection sleeve is sealed, and a connector connected with an air conveying pipe is arranged on the air injection sleeve; 3, the air injection hole units are subjected to hole washing with clear water, and well wall mud is washed away; and 4, the air injection pipe is connected with the air conveying pipe, the air conveying pipe is connected with an air compressor, and the rest can be done in the same manner, so that the plurality of air injection hole units in rows are connected according to the steps to form the air curtain wall. The air curtain wall is used for preventing and treating mine pit underground water, the underground water level around the mine pit cannot be decreased, the underground water level around the mine pit can be increased instead, and the surrounding ecological environment can be protected; and meanwhile, a large amount of underground water can be prevented from flowing into the mine pit, the effect of preventing and treating the mine pit underground water is achieved, the cost is low, construction is easy,and the construction method can be popularized within a large range.

The invention discloses an embedded rotating type ground cleaning device. The device comprises a main body shell, a high-pressure water flow can be discharged outwards on the premise of rotating, 360-degree rotating type non-dead-corner high-pressure water flow impact can be formed, the coverage range is wide, after water flow impact, high-pressure air formed through subsequent pressure can carryout impact, the ground water flow is cleaned, dual-mode cleaning is achieved, the use rate of kinetic energy is high, the device is provided with a gear engaging structure radius gradual changing typerotating strength effective reinforcing mechanism, the rotating strength can be effectively enhanced, more intensely pressure can be provided, in addition, the device is provided with an annular array arrangement spiral spring collision type maximum rotating strength control mechanism, maximum resistance during rotating is controlled, the phenomenon that due to too high inner air pressure, a drive motor is damaged can be avoided, in addition, the device is provided with a spherical-structure type air one-way flowing control mechanism, and large gas one-way flowing can be borne.

The invention discloses a basement waterproof roll construction method and a waterproof structure, and relates to the technical field of protection of building foundation structures. According to thetechnical scheme, the basement waterproof roll construction structure is characterized by comprising a cushion layer, wherein a pressure reduction layer, a base layer and a waterproof roll layer are arranged on the upper side of the cushion layer from bottom to top; the pressure reduction layer is of a double-layer hollow structure; a plurality of water permeable holes are formed in the bottom ofthe pressure reduction layer; balance valve assemblies which move in the vertical direction along with water pressure through buoyancy components and then communicate with the different holes are arranged in the water permeable holes, and thus underground water flows into the pressure reduction layer when the static water pressure of a basement is beyond than the pressure of the balance valve assemblies; when the pressure of the pressure reduction layer is beyond than the static water pressure, the water in the pressure reduction layer is drained into the cushion layer, and thus pressure self-balancing is completed; and the base layer and the waterproof roll layer form a secondary waterproof structure, and thus waterproofing of the basement is reinforced. The basement waterproof roll construction method and the waterproof structure have the technical effects that storage and replenishment are conducted through the pressure reduction layer according to the static water pressure of the underground, and thus static water balance of the whole basement is balanced.