CN219568718U - Simulator for preventing and controlling seawater invasion in multiphase aquifer - Google Patents
Simulator for preventing and controlling seawater invasion in multiphase aquifer Download PDFInfo
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- CN219568718U CN219568718U CN202320543819.7U CN202320543819U CN219568718U CN 219568718 U CN219568718 U CN 219568718U CN 202320543819 U CN202320543819 U CN 202320543819U CN 219568718 U CN219568718 U CN 219568718U
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Abstract
The utility model discloses a simulation device for preventing and controlling seawater invasion in a multiphase aquifer, which belongs to the technical field of experimental devices and comprises a transparent box body, wherein the inner cavity of the box body is divided into a salty water tank, a sand box and a fresh water tank which are sequentially arranged through porous partition plates, a salty water inlet is formed in a left box plate of the salty water tank, and a fresh water inlet is formed in a right box plate of the fresh water tank; the simulation barrier comprises a water injection well simulation pipe and/or a water-proof wall simulation board and/or an underground dam simulation board; a brine constant head circulation device; fresh water constant head circulation device. According to the simulation device provided by the utility model, the economic and practical hydraulic barrier and the mixed physical barrier construction scheme are obtained by exploring the influences of the water injection position of the water injection well on the seawater invasion inhibition effect in the multiphase aquifer through the depth of the water barrier, the height of the underground dam and the distance between the water barrier and the underground dam. The manufacturing materials of the simulation device are easy to obtain and process, and the simulation precision of the simulation device on the actual site aquifer, seawater and fresh water is high.
Description
Technical Field
The utility model relates to a simulation device for preventing and controlling seawater invasion in a multiphase aquifer, and belongs to the technical field of experimental devices.
Background
The construction of water conservancy barriers and mixed physical barriers are important engineering measures for preventing and controlling seawater invasion. The hydraulic barrier is used for preventing and controlling seawater invasion by lifting the underground fresh water level, and is simple and convenient to operate and requires relatively less manpower and material resources. The mixed physical barrier consists of a watertight waterproof wall and a semi-permeable underground dam, has lower permeability, and can prevent and treat seawater invasion by cutting off a seawater invasion channel. The water injection positions are different when the water injection flow is the same, or the effects of preventing and controlling seawater invasion of the hydraulic barrier and the mixed physical barrier are different due to the fact that the depth of the middle water wall in the field is different, the height of the underground dam is different and the distance between the water wall and the underground dam is different. Furthermore, the combined application of the water conservancy barrier and the mixed physical barrier can effectively prevent and treat seawater intrusion, but the optimal prevention and treatment scheme can be achieved only by designing the two measures, and the two measures need to be tried and verified.
The sand box device is used as a physical model for simulating seawater invasion, an optimal scheme for preventing and treating seawater invasion can be obtained by simulating various barriers, and the traditional sand box model is filled with only one medium and cannot accurately describe the water-bearing layer distribution of an actual site. In addition, the water pressure of the sea water and fresh water model established by the traditional sand box device has large deviation from the actual situation, so that the simulation precision of the device is not high.
The utility model aims to provide a device for preventing and controlling seawater invasion in a multiphase aquifer by simulating a hydraulic barrier and a mixed physical barrier so as to solve the defects in the prior art.
The foregoing is not necessarily a prior art, and falls within the technical scope of the inventors.
Disclosure of Invention
The utility model aims to solve the problems in the prior art, and provides a simulation device for preventing and controlling seawater invasion in a multiphase aquifer.
The utility model realizes the aim by adopting the following technical scheme:
an analog device for controlling seawater intrusion in a multiphase aquifer, comprising:
the device comprises a transparent box body, wherein the inner cavity of the box body is divided into a salty water tank, a sand box and a fresh water tank which are sequentially arranged from left to right through two porous partition boards, a filter screen is attached to an orifice of the porous partition boards, a medium simulating the lithology of a ground stratum is filled in the sand box, a plurality of salty water inlet ports are formed in a left box plate of the salty water tank, and a plurality of fresh water inlet ports are formed in a right box plate of the fresh water tank;
the simulation barrier comprises a water injection well simulation pipe and/or a water-proof wall simulation plate and/or an underground dam simulation plate, wherein the lower end of the water injection well simulation pipe is inserted into the upper part of the sand box, the lower end of the underground dam simulation plate is inserted into the bottom of the sand box, and the lower end of the water-proof wall simulation plate is inserted into the upper part of the sand box;
the brine fixed head circulation device is communicated with the brine inlet through a connecting pipe;
the fresh water constant head circulation device is communicated with the fresh water inlet through a connecting pipe.
Optionally, the simulation device for preventing and controlling seawater invasion in the multiphase aquifer provided by the utility model further comprises two removable baffles, wherein the two baffles can be used for blocking the orifices on the porous baffle when being respectively attached to the two porous baffles.
Optionally, the simulator for preventing and treating seawater invasion in multiphase aquifer further comprises a pressure measuring device, wherein a pressure measuring hole is formed in a back box plate of the sand box, a filter screen is attached to the pressure measuring hole, and the pressure measuring device is communicated with the pressure measuring hole through a connecting pipe.
In one embodiment, the pressure measuring device comprises a plurality of transparent pressure measuring pipes, the pressure measuring pipes are vertically fixed on a mounting plate, scale bars are arranged on the mounting plate, the upper pipe orifice of each pressure measuring pipe is opened, and the lower pipe orifice is connected with the corresponding pressure measuring hole through a connecting pipe.
In one embodiment, the brine fixed head circulation device comprises a brine storage barrel and a brine transfer box, a first partition plate is inserted in the brine transfer box, the top of the first partition plate is lower than the top of the brine transfer box, the first partition plate divides the brine transfer box into two chambers, a brine water supply port and a brine water return port are respectively formed in the bottoms of the two chambers, the brine water supply port is communicated with a brine inlet of the brine tank through a connecting pipe, the brine water return port is communicated with the brine storage barrel through the connecting pipe, and the brine storage barrel is communicated with a chamber of the brine water supply port formed in the brine transfer box through a brine pump through the connecting pipe.
In one embodiment, the fresh water fixed head circulation device comprises a first fresh water storage barrel and a fresh water transfer box, a second partition plate is inserted into the fresh water transfer box, the top of the second partition plate is lower than the top of the fresh water transfer box, the second partition plate divides the fresh water transfer box into two chambers, a fresh water supply port and a fresh water return port are respectively formed in the bottoms of the two chambers, the fresh water supply port is communicated with a fresh water inlet of the fresh water tank through a connecting pipe, the fresh water return port is communicated with the first fresh water storage barrel through the connecting pipe, and the first fresh water storage barrel is communicated with a chamber provided with the fresh water supply port through the first fresh water pump and the fresh water transfer box through the connecting pipe.
Specifically, the upper end of the water injection well simulation pipe is communicated with the second fresh water storage barrel through a second fresh water pump by a connecting pipe.
In one embodiment, the medium in the sand box comprises coarse sand, fine sand and silt from bottom to top.
Preferably, the frontal panel of the flask is painted with a 1cm x 1cm grid.
In one specific embodiment, the sand box and the porous partition plate are made of organic glass plates, the filter screen is made of acrylic resin materials, and the waterproof wall simulation plate and the underground dam simulation plate are made of acrylic resin materials;
the fresh water inlet, the salt water inlet, the fresh water supply port, the fresh water return port, the salt water supply port and the salt water return port are all provided with valves;
and a coloring agent is mixed in the salty water tank.
The beneficial effects of the utility model include, but are not limited to:
in order to solve the technical problems, the utility model provides a simulation device for preventing and controlling seawater invasion in a multiphase aquifer by using a hydraulic barrier and a mixed physical barrier, wherein the hydraulic barrier and the mixed physical barrier construction scheme are obtained by exploring the influences of the depth of a water barrier, the height of an underground dam and the distance between the water barrier and the underground dam and the water injection position of a water injection well on the seawater invasion inhibition effect in the multiphase aquifer so as to inhibit the seawater invasion of an actual site. The manufacturing materials of the simulation device are easy to obtain and process, and the simulation precision of the simulation device on the actual site aquifer, seawater and fresh water is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic diagram of a simulation device for preventing and controlling seawater invasion in a multiphase aquifer;
FIG. 2 is a schematic view of a flask and porous separator;
110, a brine tank; 111. a salt water inlet; 120. a sand box; 121. coarse sand; 122. fine sand; 123. powder sand; 124. a pressure measuring hole; 130. a fresh water tank; 131. a fresh water inlet port;
200. a porous separator;
310. a water injection well simulation pipe; 311. a second fresh water storage tub; 320. a waterproof wall simulation board; 330. an underground dam simulation board;
400. a brine constant head circulation device; 410. a salt water storage tank; 420. a salt water transfer box; 430. a first separator; 441. a salt water supply port; 442. a salt water return port;
500. fresh water constant head circulation device; 510. a first fresh water storage tub; 520. fresh water transfer box; 530. a second separator; 541. fresh water supply port; 542. fresh water return port;
600. a pressure measuring device; 610. a pressure measuring tube; 620. a mounting plate; 630. a scale bar.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than as described herein. Therefore, the scope of the utility model is not limited by the specific embodiments disclosed below.
As shown in fig. 1 and 2, the simulation device for preventing and controlling seawater invasion in a multiphase aquifer provided by the utility model comprises a transparent box body, a saline water constant head circulation device and a fresh water constant head circulation device.
Specifically, the inner cavity of the box body is divided into a salty water tank 110, a sand box 120 and a fresh water tank 130 which are sequentially arranged from left to right through two porous clapboards 200, a filter screen is attached to the hole opening of the porous clapboards 200, the sand box 120 is filled with a medium for simulating the lithology of the stratum of the field, and a simulation barrier is inserted in the medium. In practice, the flask 120 is filled with a medium according to the lithology of the field formation. Preferably, the medium in the sand box 120 comprises coarse sand 121, fine sand 122 and silt 123 from bottom to top, and can be used for simulating multiphase aquifers, so that the simulation result is more real, and the defect that the conventional sand box model is filled with only one medium and cannot accurately describe the distribution of the aquifers in an actual field is overcome.
In the actual natural environment, in a salty-fresh water mixing area, water flow presents obvious layering phenomenon due to density difference: the fresh water runoff with smaller density is arranged on the upper layer and leaks downwards, the sea water with larger density is arranged on the lower layer and traced along the shore along with the tide rising force, a shearing force is generated at the interface of the salty and the fresh water, and the shearing force and the gradient of the water are kept balanced, so that the salty water invades into the river mouth in a wedge shape, namely the salty water wedge. According to the simulation device provided by the utility model, salt water in the salt water tank 110 permeates into the sand box 120 to the right through the holes in the porous partition plate, fresh water in the fresh water tank 130 permeates into the sand box 120 to the left through the holes in the porous partition plate, and after a salt water interface moves to a stable state, a salt water wedge is formed through simulation.
The simulation barrier includes a water injection well simulation pipe 310 and/or a waterproof wall simulation plate 320 and/or a ground dam simulation plate 330, the lower end of the water injection well simulation pipe 310 is inserted into the upper portion of the sand box 120, the lower end of the ground dam simulation plate 330 is inserted into the bottom of the sand box 120, and the lower end of the waterproof wall simulation plate 320 is inserted into the upper portion of the sand box 120. In simulating the hydraulic barrier, the water injection well simulation pipe 310 is inserted into the flask 120. The waterproof wall simulation board 320 and the subsurface dam simulation board 330 are selected to simulate a single physical barrier when one of them is inserted into the flask 120, and simulate a hybrid physical barrier when both are inserted simultaneously.
A left side box plate of the brine tank 110 is provided with a plurality of brine inlets 111, and the brine fixed head circulation device 400 is communicated with the brine inlets 111 through a connecting pipe; the right side plate of the fresh water tank 130 is provided with a plurality of fresh water inlet ports 131, and the fresh water constant head circulation device 500 is communicated with the fresh water inlet ports 131 through connecting pipes. Thus, the constant head water supply to the brine tank 110 and the fresh water tank 130 is realized, and the simulation precision of the seawater and the fresh water is improved.
In the experiment, it is necessary to fill the brine tank 110 with brine, fill the flask 120 with fresh water, fill the fresh water tank 130 with fresh water, and then open the hydraulic connection between the flask 120 and the brine tank 110 and the fresh water tank 130. Therefore, in the process of filling the brine tank 110, the sand box 120, and the fresh water tank 130 with water, the openings in the porous partition 200 need to be closed, and the openings need to be opened when hydraulic communication is established. In order to facilitate the above-mentioned operations, in a preferred embodiment, the simulation device for preventing and controlling seawater intrusion in a multiphase aquifer provided by the present utility model further comprises two removable baffles, which can seal the openings in the porous partition 200 when they are respectively abutted against the two porous partition 200. The baffle adopts a waterproof plate body, such as an acrylic plate.
Specifically, the brine fixed head circulation device 400 includes a brine storage barrel 410 and a brine transfer box 420, a first partition plate 430 is inserted in the brine transfer box 420, the top of the first partition plate 430 is lower than the top of the brine transfer box 420, the first partition plate 430 divides the brine transfer box 420 into two chambers, a brine water supply port 441 and a brine water return port 442 are respectively formed in the bottoms of the two chambers, the brine water supply port 441 is communicated with a brine inlet 111 of the brine tank 110 through a connecting pipe, the brine water return port 442 is communicated with the brine storage barrel 410 through a connecting pipe, and the brine storage barrel 410 is also communicated with a chamber provided with the brine water supply port 441 through the brine pump and the brine transfer box 420 through the connecting pipe.
The fresh water fixed head circulation device 500 comprises a first fresh water storage barrel 510 and a fresh water transfer box 520, wherein a second partition plate 530 is inserted into the fresh water transfer box 520, the top of the second partition plate 530 is lower than the top of the fresh water transfer box 520, the fresh water transfer box 520 is divided into two chambers by the second partition plate 530, a fresh water supply port 541 and a fresh water return port 542 are respectively formed in the bottoms of the two chambers, the fresh water supply port 541 is communicated with the fresh water inlet 131 of the fresh water tank 130 through a connecting pipe, the fresh water return port 542 is communicated with the first fresh water storage barrel 510 through a connecting pipe, and the first fresh water storage barrel 510 is also communicated with the chamber provided with the fresh water supply port 541 of the fresh water transfer box 520 through the first fresh water pump through the connecting pipe.
In operation, the first fresh water pump pumps fresh water in the first fresh water storage barrel 510 into the chamber of the fresh water transfer box 520 provided with the fresh water supply port 541, and the brine pump pumps brine in the brine storage barrel 410 into the chamber of the brine transfer box 420 provided with the brine supply port 441. When the water level in the chamber with the fresh water supply port 541 of the fresh water transfer box 520 reaches the top end of the second partition 530, the re-entered water overflows into the chamber with the fresh water return port 542, and then returns to the first fresh water storage barrel 510 through the connection pipe. Thus, a constant water level is formed in the chamber provided with the fresh water supply port 541 in the fresh water transfer box 520, and fresh water constant head water supply is realized. Similarly, the salt water in the salt water transfer tank 420 also forms a constant water level, and the salt water is supplied by a constant water head.
Further, the upper end of the water injection well simulation pipe 310 is communicated with the second fresh water storage barrel 311 through a second fresh water pump by a connecting pipe, and water in the second fresh water storage barrel 311 is injected into the water injection well simulation pipe 310 by the second fresh water pump.
Further, the simulation device for preventing and controlling seawater invasion in the multiphase aquifer provided by the utility model further comprises a pressure measuring device 600, wherein the back box plate of the sand box 120 is provided with a pressure measuring hole 124, a filter screen is attached to the pressure measuring hole 124, and the pressure measuring device 600 is communicated with the pressure measuring hole 124 through a connecting pipe.
In one embodiment, the pressure measuring device 600 includes a plurality of transparent pressure measuring tubes 610, the pressure measuring tubes 610 are vertically fixed on a mounting plate 620, and a scale bar 630 is attached to the mounting plate 620 near the pressure measuring tubes 610, so as to conveniently measure the liquid level in the pressure measuring tubes 610. The upper pipe orifice of each pressure measuring pipe 610 is opened, the lower pipe orifice is connected with the corresponding pressure measuring hole 124 through a connecting pipe, and the water levels of the sand box 120 at different pressure measuring holes 124 are transmitted into the pressure measuring pipe 610.
The salt water transfer box 420 and the fresh water transfer box 520 are placed on a bracket with adjustable height, the water level of the salt water transfer box 420 is consistent with that of the salt water tank 110, the fresh water transfer box 520 is consistent with that of the fresh water tank 130, and the heights of the salt water transfer box 420 and the fresh water transfer box 520 are adjusted through the bracket.
Preferably, a grid of 1cm by 1cm is drawn on the front face plate of the flask 120 to facilitate the measurement of the insertion depth and the distance of the water injection well simulation tubes 310, the water-stop wall simulation plates 320, the ground dam simulation plates 330.
In general, valves are provided in each of the fresh water inlet 131, the salt water inlet 111, the fresh water supply port 541, the fresh water return port 542, the salt water supply port 441, and the salt water return port 442, so that the water inlet timing can be controlled conveniently.
Typically, the sand box 120 and the porous partition board 200 are made of organic glass plates, the filter screen is made of acrylic resin, and the water injection well simulation pipe 310 is a subcritical force pipe; the material of the waterproof wall simulation board 320 and the ground dam simulation board 330 is an acrylic resin material; the first and second separators 430 and 530 are acrylic plates.
The connecting pipe adopts a rubber pipe or a silica gel pipe. The first fresh water pump adopts a submersible pump, and the second fresh water pump preferably adopts a peristaltic pump.
The simulation device and the working process provided by the utility model are described in the following by way of specific embodiments.
Examples:
in this embodiment, the sand box 120 is sized: 1.4m long, 0.1m wide and 0.5m high; the porous separator 200 has the following dimensions: 0.1m long, 0.5m high and 0.01m thick.
The back plate of the sand box 120 is provided with 5 rows and 10 columns of pressure taps 124, which are 50 eyes.
The thicknesses of the coarse sand, the fine sand and the silt are respectively 18cm, 12cm and 15cm.
The dimensions of the salt water transfer box 420 and the fresh water transfer box 520 are: the length, width and height are 30cm.
A valve is arranged at the position 20cm higher than the right side of the fresh water tank 130; a valve is arranged at the position 20cm higher than the left box plate of the salty water box 110.
The first and second spacers 430 and 530 have a height of 20cm.
The length of the water injection well simulation pipe 310 is 40cm, the diameter is 1cm, and the number of the water injection well simulation pipes is 20; the lower ends of the water injection well simulation tubes 310 are inserted to different depths of the sand box 120 for simulating the influence of different water injection positions on the intrusion of seawater.
The waterproof wall simulation boards 320 and the under dam simulation boards 330 having heights of 10cm, 15cm, 20cm, 25cm, 30cm, 35cm, 40cm were prepared.
The mounting plate 620 is a PVC plate, and has a length of 1m and a width of 0.8m; 36 pressure measuring pipes 610 are fixed on the mounting plate 620, the length of the pressure measuring pipes 610 is 1m, and the diameter is 4mm; the length of the tick 630 that can be measured is 1m.
The salt water in the salt water tank 110 is NaCl solution with the concentration of 25g/L and is used for simulating a seawater sample; the salt water is mixed with a coloring agent, the concentration is 5g/L, and the seawater invasion range is convenient to observe. Specifically, carmine stain is used as the stain.
The working process of the simulation device provided in this embodiment is as follows:
(1) The two baffles are respectively inserted into the sand box 120 by being abutted against the porous baffle 200, so that the orifice on the porous baffle 200 is blocked, then the sand box 120 is filled with medium, and the thickness of each time of filling is 1-2cm, and the sand box is compacted once;
(2) Slowly adding water into the sand box 120, controlling the water adding speed to prevent the medium from being washed up, and stopping adding water when the water level of the sand box 120 reaches 41 cm;
(3) Pumping fresh water to a chamber provided with a fresh water supply port 541 of the fresh water transfer box 520 by using a first fresh water pump in the first fresh water storage barrel 510, opening valves on the fresh water inlet 131 and the fresh water supply port 541, and allowing the fresh water to flow into the fresh water tank 130; opening a valve on the fresh water return port 542, and when the fresh water level in the cavity provided with the fresh water supply port 541 reaches the top end of the second partition plate 530, pumping fresh water into the cavity provided with the fresh water return port 542, and returning the fresh water to the fresh water storage cylinder through a connecting pipe, so that constant head water inlet of the fresh water tank 130 is realized;
the salt water is pumped to a chamber with a salt water supply port 441 of a salt water transfer box 420 by a salt water pump in a salt water storage barrel 410, and valves on the salt water inlet 111 and the salt water supply port 441 are opened, so that salt water flows into a salt water tank 110; opening a valve on the salt water return port 442, when the salt water level in the cavity provided with the salt water supply port 441 reaches the top end of the first partition plate 430, the pumped salt water enters the cavity provided with the salt water return port 442, and then returns to the salt water storage cylinder through the connecting pipe, so that the constant water head water inflow of the salt water tank 110 is realized;
(4) Pulling out two baffles to generate hydraulic connection between the sand box 120 and the salty water tank 110 and the fresh water tank 130, and starting a simulation test, wherein carmine coloring agent is added into salty water, so that the invasion condition of salty water can be observed conveniently;
(5) After the interface of the salt water and the fresh water is moved to a stable state, after the front position of the salt water wedge in an initial state is recorded, sequentially increasing by 10cm from the front horizontal direction of the salt water wedge in a fresh water area, and placing a water injection well simulation pipe 310 at positions with heights of 5cm, 15cm, 25cm and 35cm in sequence, wherein the water injection flow of the water injection well simulation pipe 310 is 200ml/min;
in simulating the composite physical barrier, in the area of the saline wedge in the medium of the sand box 120, then the waterproof wall simulation board 320 with the height of 40cm is inserted into the simulated waterproof wall with the depth of 20cm, 22cm, 24cm, 26cm, 28cm and 30cm respectively, the underground dam simulation board 330 with the heights of 10cm, 15cm, 20cm, 25cm, 30cm and 35cm is inserted into the underground dam at the bottom of the sand box 120, and the horizontal distance between the waterproof wall and the underground dam is 4cm, 5cm, 6cm, 7cm, 8cm, 9cm and 10cm respectively.
After the water injection well simulation pipe 310 is injected with water, the water-proof wall simulation board 320 and the underground dam simulation board 330 are inserted, the salty-water interface reaches a new stable state, the position where the salty-water wedge front reaches is recorded at the moment, the position of the salty-water wedge front in the initial state is compared, and the seawater invasion backspacing coefficient (R) representing the driving-back degree of the salty-water wedge is calculated, namely the effectiveness of preventing seawater invasion by the hydraulic barrier and the mixed physical barrier is obtained. And respectively calculating R and R maximum situations under the situations, namely the optimal position and the optimal height of the hydraulic barrier and the mixed physical barrier for preventing and treating seawater invasion.
The roll-back coefficient (R) is:
wherein: l (L) 0 -the distance of the front of the wedge of salt water from the coastline in the initial stable condition;
l-distance from the front of the wedge of salt water to the coastline when stabilization is again achieved after setting the hydraulic barrier and the hybrid physical barrier.
Thus, by using the simulation device provided by the utility model, through setting different simulation situations, in particular by setting water injection wells at different positions, water isolation walls at different depths, underground dams at different heights and different intervals, the optimal scheme for preventing and controlling seawater invasion by using the hydraulic barrier and the mixed physical barrier is found. The simulation is carried out before the actual construction of the prevention measures, so that the constructed physical barrier can be verified to be capable of effectively preventing and controlling seawater invasion.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly communicated or indirectly communicated through an intermediate medium, and can be communicated between two elements or the interaction relationship between the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (10)
1. An analog device for controlling seawater intrusion in a multiphase aquifer, comprising:
the device comprises a transparent box body, wherein the inner cavity of the box body is divided into a salty water tank, a sand box and a fresh water tank which are sequentially arranged from left to right through two porous partition boards, a filter screen is attached to an orifice of the porous partition boards, a medium simulating the lithology of a ground stratum is filled in the sand box, a plurality of salty water inlet ports are formed in a left box plate of the salty water tank, and a plurality of fresh water inlet ports are formed in a right box plate of the fresh water tank;
the simulation barrier comprises a water injection well simulation pipe and/or a water-proof wall simulation plate and/or an underground dam simulation plate, wherein the lower end of the water injection well simulation pipe is inserted into the upper part of the sand box, the lower end of the underground dam simulation plate is inserted into the bottom of the sand box, and the lower end of the water-proof wall simulation plate is inserted into the upper part of the sand box;
the brine fixed head circulation device is communicated with the brine inlet through a connecting pipe;
the fresh water constant head circulation device is communicated with the fresh water inlet through a connecting pipe.
2. A simulation device for controlling seawater intrusion in a multiphase aquifer according to claim 1 further comprising two removable baffles capable of sealing the apertures in the porous barrier when the two baffles are respectively in contact with the two porous barriers.
3. The simulator for preventing and treating seawater intrusion in a multiphase aquifer of claim 1, further comprising a pressure measuring device, wherein a pressure measuring hole is formed in a back box plate of the sand box, a filter screen is attached to the pressure measuring hole, and the pressure measuring device is communicated with the pressure measuring hole through a connecting pipe.
4. A simulation device for preventing and controlling seawater intrusion in a multiphase aquifer according to claim 3, wherein the pressure measuring device comprises a plurality of transparent pressure measuring tubes, the pressure measuring tubes are vertically fixed on a mounting plate, scale bars are arranged on the mounting plate, and an upper tube orifice and a lower tube orifice of each pressure measuring tube are arranged in an open manner and are connected with corresponding pressure measuring holes through connecting tubes.
5. The simulation device for preventing and controlling seawater invasion in a multiphase aquifer according to claim 1, wherein the brine fixed head circulation device comprises a brine storage barrel and a brine transfer box, a first partition plate is inserted in the brine transfer box, the top of the first partition plate is lower than the top of the brine transfer box, the first partition plate divides the brine transfer box into two chambers, a brine water supply port and a brine water return port are respectively formed in the bottoms of the two chambers, the brine water supply port is communicated with a brine inlet of the brine tank through a connecting pipe, the brine water return port is communicated with the brine storage barrel through a connecting pipe, and the brine storage barrel is further communicated with a chamber in which the brine water supply port is formed in the brine transfer box through a brine pump through a connecting pipe.
6. The simulation device for preventing and controlling seawater invasion in a multiphase aquifer according to claim 1, wherein the fresh water fixed head circulation device comprises a first fresh water storage barrel and a fresh water transfer box, a second partition plate is inserted in the fresh water transfer box, the top of the second partition plate is lower than the top of the fresh water transfer box, the second partition plate divides the fresh water transfer box into two chambers, a fresh water supply port and a fresh water return port are respectively formed in the bottoms of the two chambers, the fresh water supply port is communicated with a fresh water inlet of the fresh water tank through a connecting pipe, the fresh water return port is communicated with the first fresh water storage barrel through the connecting pipe, and the first fresh water storage barrel is further communicated with a chamber provided with the fresh water supply port through the first fresh water pump and the fresh water transfer box through the connecting pipe.
7. The simulation device for preventing and controlling seawater intrusion in a multiphase aquifer according to claim 1, wherein the upper end of the water injection well simulation pipe is communicated with the second fresh water storage bucket through a second fresh water pump by a connecting pipe.
8. A simulation device for controlling seawater intrusion in a multiphase aquifer according to claim 1, wherein the medium in the flask comprises coarse sand, fine sand, silt from bottom to top.
9. A simulation apparatus for controlling seawater intrusion in a multiphase aquifer according to claim 1, wherein a grid of 1cm x 1cm is drawn on the frontal plate of the flask.
10. The simulation device for preventing and controlling seawater intrusion in a multiphase aquifer according to claim 1, wherein the sand box and the porous partition plate are made of organic glass plates, the filter screen is made of acrylic resin materials, and the waterproof wall simulation plate and the underground dam simulation plate are made of acrylic resin materials;
the fresh water inlet, the salt water inlet, the fresh water supply port, the fresh water return port, the salt water supply port and the salt water return port are all provided with valves;
and a coloring agent is mixed in the salty water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320543819.7U CN219568718U (en) | 2023-03-16 | 2023-03-16 | Simulator for preventing and controlling seawater invasion in multiphase aquifer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320543819.7U CN219568718U (en) | 2023-03-16 | 2023-03-16 | Simulator for preventing and controlling seawater invasion in multiphase aquifer |
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| CN117803044A (en) * | 2024-02-29 | 2024-04-02 | 山东省水利科学研究院 | Combined well salty and fresh water synchronous exploitation recharging device and method thereof |
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| CN117803044A (en) * | 2024-02-29 | 2024-04-02 | 山东省水利科学研究院 | Combined well salty and fresh water synchronous exploitation recharging device and method thereof |
| CN117803044B (en) * | 2024-02-29 | 2024-05-31 | 山东省水利科学研究院 | Combined well salty and fresh water synchronous exploitation recharging device and method thereof |
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