A device for simulating groundwater depth control experiment and method for using the same

Abstract

The present invention relates to the technical field of groundwater level simulation and control, and provides an experimental device for simulating groundwater depth control and a method for using the same. The device comprises: a coarse stone layer, a crushed stone layer, and a fine sand layer arranged in sequence from bottom to top, four partitions are arranged on the fine sand layer, and soil is filled in the rectangular surrounding area to form a test area; each of the partitions comprises an inner plate and an outer plate, and a pressure water storage area is formed between the inner plate and the outer plate; a water level control area is arranged around the periphery of the four partitions, and the water level control area is connected to each of the partitions, and water is injected into the pressure water storage area of ​​the partition, and the water in the pressure water storage area flows into the soil. The beneficial effect is that it can simulate the process of water seeping into the soil from all sides, and can relatively accurately control the water seepage speed, while also avoiding the problem of upward overflow caused by excessive pressure in the gap between the inner plate and the soil caused by injecting water from the bottom to the top to adjust the water level.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater level simulation and control, and in particular to a simulated groundwater depth control experimental device and a method for using the same. Background Art

[0002] Currently, groundwater levels in many areas are rapidly declining due to groundwater extraction, causing numerous ecological problems. This is particularly true in North China, where groundwater levels are declining rapidly, forming numerous large groundwater funnels. Therefore, it is necessary to develop various simulated groundwater research platforms to investigate the impacts of varying groundwater levels on agricultural ecosystems. Small simulation facilities are relatively simple to control groundwater levels due to their small scale. However, large facilities, due to their large spatial scale and the influence of soil texture, have relatively slow water transfer rates, making precise and rapid groundwater level control difficult.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for simulating groundwater depth control experiment and a method for using the same, so as to solve the technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a simulated groundwater depth control experimental device, comprising: a coarse stone layer, a crushed stone layer and a fine sand layer arranged in sequence from bottom to top, four partitions are arranged on the fine sand layer, the four partitions are connected end to end to form a rectangular surrounding area, and the rectangular surrounding area is filled with soil to form a test area; each of the partitions includes an inner plate and an outer plate, and a pressure water storage area is formed between the inner plate and the outer plate; a water level control area is arranged around the outer periphery of the four partitions, and the water level control area is connected to each of the partitions, and water is injected into the pressure water storage area of ​​the partition, and the water in the pressure water storage area flows to the soil.

[0006] In an optional embodiment, the water level control area includes a water inlet pipe and a drain pipe that are vertically upward and adjacent to each other, the water inlet pipe is connected in parallel to the water inlet ends of the first water level control pipe, the second water level control pipe, the third water level control pipe and the fourth water level control pipe, and the drain pipe is connected in parallel to the water outlet ends of the first water level control pipe, the second water level control pipe, the third water level control pipe and the fourth water level control pipe.

[0007] In an optional embodiment, the distances between the first water level control pipe, the second water level control pipe, the third water level control pipe and the fourth water level control pipe are equal, and multiple water inlet connecting pipes are evenly arranged on the first water level control pipe, the second water level control pipe, the third water level control pipe and the fourth water level control pipe, and each of the water inlet connecting pipes is connected to the pressure water storage area of ​​the partition.

[0008] In an optional embodiment, a plurality of water outlet holes are evenly arranged on the inner plate of each partition.

[0009] In an optional embodiment, the pressure water storage area of ​​the partition is filled with crushed stones.

[0010] In an optional embodiment, a water level observation well is provided inwardly from the center of the test area.

[0011] In an optional embodiment, a first blocking horizontal plate, a second blocking horizontal plate, a third blocking horizontal plate, a first blocking vertical plate and a second blocking vertical plate are provided inside the partition, and the first blocking vertical plate and the second blocking vertical plate are cross-arranged with the first blocking horizontal plate, the second blocking horizontal plate and the third blocking horizontal plate, dividing the pressure water storage area inside each partition into 12 areas that are not connected to each other, and the 12 areas are respectively connected to one of the water inlet connecting pipes.

[0012] In an optional embodiment, the distances between the first blocking horizontal plate, the second blocking horizontal plate and the third blocking horizontal plate are equal, and they are respectively arranged below the first water level regulating pipe, the second water level regulating pipe and the third water level regulating pipe; the first blocking vertical plate and the second blocking vertical plate divide each of the partitions into equal parts horizontally.

[0013] On the other hand, an embodiment of the present invention provides a method for using a simulated groundwater depth control experimental device, comprising the following steps:

[0014] S1: Open the water inlet pipe, close the drain pipe, and inject water into the water level control area through the water inlet pipe;

[0015] S2: The water level control area injects water into the pressure water storage area in the inner cavity of the partition, and the water in the pressure water storage area flows to the soil in the test area through the water outlet holes on the inner plate of the partition;

[0016] S3: The water level in the soil is observed through the water level observation well. After the experiment is completed, the water inlet pipe is closed and the drainage pipe is opened. The water in the soil of the test area is discharged through the coarse stone layer, gravel layer, fine sand layer and drainage pipe at the bottom.

[0017] In an optional embodiment, in S2: water is respectively injected into the multiple pressure water storage areas divided inside each partition.

[0018] The beneficial effects of the present invention are:

[0019] (1) The simulated groundwater depth control experimental device is equipped with a water level control area around the partition. The water level control area injects water into the partition with gravel in the internal cavity, and then infiltrates the water into the soil of the test area through the water outlet holes on the inner plate of the partition. This can simulate the process of water seeping into the soil from all sides and can relatively accurately control the water seepage rate. At the same time, it can also avoid the problem of upward overflow caused by excessive pressure in the gap between the inner plate and the soil. It should also be pointed out that when the water level in the soil is higher than the water level in the partition and drainage is required, drainage can be simultaneously conducted through the lower part of the soil and the water level control area.

[0020] (2) The four baffles of the simulated groundwater depth control experimental device system can be connected as a whole or each baffle can be divided into multiple evenly distributed small blocks. When each baffle is divided into multiple small blocks, each small block is connected to a corresponding water inlet connecting pipe. Under the condition that the inner plate and the soil do not overflow and the water pressure is not adjusted, the water infiltration speed and infiltration distance in this direction toward the soil (perpendicular to the direction of the inner plate) are increased, thereby improving the water infiltration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a simulated groundwater depth control experimental device provided in one embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the internal structure of the partition.

[0024] Wherein, the accompanying drawings are marked as follows:

[0025] 1- partition, 2- water outlet, 3- soil, 4- water level observation well, 5- test area; 6- water level control area, 7- second water level control pipe, 8- water inlet connecting pipe, 9- drainage pipe, 10- water inlet pipe, 11- first water level control pipe, 12- third water level control pipe, 13- fourth water level control pipe, 14- coarse stone layer, 15- gravel layer, 16- fine sand layer, 17- first blocking horizontal plate, 18- second blocking horizontal plate, 19- third blocking horizontal plate, 20- first blocking vertical plate, 21- second blocking vertical plate. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0028] Example 1

[0029] Please see the attached Figure 1 The purpose of this embodiment is to provide a simulated groundwater depth control experimental device, including: a coarse stone layer 14, a crushed stone layer 15 and a fine sand layer 16 arranged in sequence from bottom to top, four partitions 1 are arranged on the fine sand layer 16, and the four partitions 1 are connected end to end to form a rectangular surrounding area, and the rectangular surrounding area is filled with soil to form a test area 5; in this embodiment, the four partitions 1 are internally connected, and each partition 1 includes an inner plate and an outer plate, and a pressure water storage area is formed between the inner plate and the outer plate; a water level control area 6 is arranged around the outer periphery of the four partitions 1, and the water level control area 6 is connected to each partition 1, and water is injected into the pressure water storage area of ​​the partition 1, and the water in the pressure water storage area flows to the soil.

[0030] Specifically, the water level control area 6 includes a water inlet pipe 10 and a water outlet pipe 9 that are arranged vertically and adjacent to each other. The water inlet pipe 10 is connected in parallel to the water inlet ends of the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13. The water outlet pipe 9 is connected in parallel to the water outlet ends of the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13. The distances between the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13 are equal. A plurality of water inlet connecting pipes 8 are evenly arranged on the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13, and each water inlet connecting pipe 8 is connected to the pressure water storage area of ​​the partition 1.

[0031] Furthermore, a plurality of water outlet holes 2 are evenly arranged on the inner plate of each partition 1, and the aperture of the water outlet hole 2 is less than 5 mm. The pressure water storage area of ​​the partition 1 is filled with gravel, and the average particle size of the gravel is not less than 1 cm. It is preferably irregular polyhedron gravel to ensure that water can flow freely in the gaps. A water level observation well 4 is set inward at the center of the test area 5 to observe the water level in the soil. It should be pointed out that since water can flow freely in the water level control area 6, and the water supply ports of multiple water inlet connecting pipes 8 can supply water, the water level in the water level control area 6 can be guaranteed to be consistent. At the same time, referring to the actual water supply and drainage conditions in the field, the water conduction distance is reduced by supplying water all around at the same time, so that the water level inside the test area 5 quickly reaches the preset water level.

[0032] The method for using the above-mentioned simulated groundwater depth control experimental device includes the following steps:

[0033] S1: Open the water inlet pipe 10, close the drain pipe 9, and inject water into the water level control area 6 through the water inlet pipe 10;

[0034] S2: The water level control area 6 injects water into the pressure water storage area in the inner cavity of the partition 1. The water in the pressure water storage area flows into the soil in the test area 6 through the water outlet 2 on the inner plate of the partition 1;

[0035] S3: Observe the water level in the soil through the water level observation well 4. After the experiment is completed, close the water inlet pipe 10 and open the drainage pipe 9. The water in the soil of the test area 6 is discharged through the coarse stone layer 14, the gravel layer 15, the fine sand layer 16 at the bottom, and the drainage pipe 9. When the soil water level is higher than the water level in the partition 1, it can be drained in time.

[0036] Example 2

[0037] Please see the attached Figure 1-2 The purpose of this embodiment is to provide a simulated groundwater depth control experimental device, including: a coarse stone layer 14, a crushed stone layer 15 and a fine sand layer 16 arranged in sequence from bottom to top, four partitions 1 are arranged on the fine sand layer 16, and the four partitions 1 are connected end to end to form a rectangular surrounding area, and the rectangular surrounding area is filled with soil to form a test area 5; in this embodiment, the four partitions 1 are not connected to each other, and each partition 1 includes an inner plate and an outer plate, and a pressure water storage area is formed between the inner plate and the outer plate; a water level control area 6 is arranged around the outer periphery of the four partitions 1, and the water level control area 6 is connected to each partition 1, and water is injected into the pressure water storage area of ​​the partition 1, and the water in the pressure water storage area flows to the soil.

[0038] Specifically, the water level control area 6 includes a water inlet pipe 10 and a water outlet pipe 9 that are arranged vertically and adjacent to each other. The water inlet pipe 10 is connected in parallel to the water inlet ends of the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13. The water outlet pipe 9 is connected in parallel to the water outlet ends of the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13. The distances between the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13 are equal. A plurality of water inlet connecting pipes 8 are evenly arranged on the first water level control pipe 11, the second water level control pipe 7, the third water level control pipe 12, and the fourth water level control pipe 13, and each water inlet connecting pipe 8 is connected to the pressure water storage area of ​​the partition 1.

[0039] Furthermore, a plurality of water outlet holes 2 are evenly arranged on the inner plate of each partition 1, and the aperture of the water outlet hole 2 is less than 5 mm. The pressure water storage area of ​​the partition 1 is filled with gravel, and the average particle size of the gravel is not less than 1 cm. It is preferably irregular polyhedron gravel to ensure that water can flow freely in the gaps. A water level observation well 4 is set inward at the center of the test area 5 to observe the water level in the soil. It should be pointed out that since water can flow freely in the water level control area 6, and the water supply ports of multiple water inlet connecting pipes 8 can supply water, the water level in the water level control area 6 can be guaranteed to be consistent. At the same time, referring to the actual water supply and drainage conditions in the field, the water conduction distance is reduced by supplying water all around at the same time, so that the water level inside the test area 5 quickly reaches the preset water level.

[0040] In this embodiment, the interior of the bulkhead 1 is provided with a first blocking transverse plate 17, a second blocking transverse plate 18, a third blocking transverse plate 19, a first blocking vertical plate 20, and a second blocking vertical plate 21. The first blocking vertical plates 20 and the second blocking vertical plates 21 are arranged crosswise with the first blocking transverse plates 17, the second blocking transverse plates 18, and the third blocking transverse plates 19, dividing the pressure water storage area within each bulkhead 1 into 12 mutually disconnected regions, each of which is connected to a water inlet connecting pipe 8. The first blocking transverse plates 17, the second blocking transverse plates 18, and the third blocking transverse plates 19 are equidistant from each other and are respectively positioned below the first water level control pipe 11, the second water level control pipe 7, and the third water level control pipe 12. The first blocking vertical plates 20 and the second blocking vertical plates 21 divide each bulkhead 1 into equal sections horizontally. Each partition is divided into multiple evenly distributed small pieces. When each partition is divided into multiple small pieces, each small piece is connected to a corresponding water inlet connecting pipe. Under the condition of constant water pressure, the above structure can increase the pressure of water flowing toward the soil to a certain extent. Under the condition of ensuring that the inner plate and the soil do not overflow (avoiding the problem of upward overflow caused by excessive pressure in the gap between the inner plate and the soil caused by adjusting the water level by injecting water from the bottom up), the infiltration speed and infiltration distance of water in this direction perpendicular to the inner plate toward the soil are increased, thereby improving the water infiltration efficiency.

[0041] The method for using the above-mentioned simulated groundwater depth control experimental device includes the following steps:

[0042] S1: Open the water inlet pipe 10, close the drain pipe 9, and inject water into the water level control area 6 through the water inlet pipe 10;

[0043] S2: The water level control area 6 injects water into the pressure water storage area in the inner cavity of the partition 1, and the water in the pressure water storage area flows to the soil in the test area 6 through the water outlet 2 on the inner plate of the partition 1; specifically, water is injected into the multiple pressure water storage areas (multiple small areas) divided inside each partition 1.

[0044] S3: Observe the water level in the soil through the water level observation well 4. After the experiment is completed, close the water inlet pipe 10 and open the drainage pipe 9. The water in the soil of the test area 6 is discharged through the coarse stone layer 14, the gravel layer 15, the fine sand layer 16 at the bottom, and the drainage pipe 9. When the soil water level is higher than the water level in the partition 1, it can be drained in time.

[0045] Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A simulated groundwater depth control experimental device, characterized in that: include: A coarse stone layer (14), a crushed stone layer (15) and a fine sand layer (16) are sequentially arranged from bottom to top, four partitions (1) are arranged on the fine sand layer (16), and the four partitions (1) are connected end to end to form a rectangular surrounding area, and the rectangular surrounding area is filled with soil to form a test area (5); Each of the partitions (1) comprises an inner plate and an outer plate, and a pressure water storage area is formed between the inner plate and the outer plate; a water level control area (6) is provided around the periphery of the four partitions (1), and the water level control area (6) is connected to each of the partitions (1), and water is injected into the pressure water storage area of ​​the partition (1), and the water in the pressure water storage area flows toward the soil; The water level control area (6) comprises a water inlet pipe (10) and a drainage pipe (9) which are arranged vertically upward and adjacent to each other, wherein the water inlet pipe (10) is connected in parallel to the water inlet ends of the first water level control pipe (11), the second water level control pipe (7), the third water level control pipe (12) and the fourth water level control pipe (13), and the drainage pipe (9) is connected in parallel to the water outlet ends of the first water level control pipe (11), the second water level control pipe (7), the third water level control pipe (12) and the fourth water level control pipe (13); The first water level control pipe (11), the second water level control pipe (7), the third water level control pipe (12) and the fourth water level control pipe (13) are equidistant from each other; a plurality of water inlet connecting pipes (8) are evenly arranged on the first water level control pipe (11), the second water level control pipe (7), the third water level control pipe (12) and the fourth water level control pipe (13); each of the water inlet connecting pipes (8) is connected to the pressure water storage area of ​​the partition (1); A plurality of water outlet holes (2) are evenly arranged on the inner layer of each partition (1); The interior of the partition (1) is provided with a first blocking transverse plate (17), a second blocking transverse plate (18), a third blocking transverse plate (19), a first blocking vertical plate (20), and a second blocking vertical plate (21); the first blocking vertical plate (20), the second blocking vertical plate (21) are arranged crosswise with the first blocking transverse plate (17), the second blocking transverse plate (18), and the third blocking transverse plate (19), so as to divide the pressure water storage area inside each partition (1) into 12 mutually unconnected areas, and each of the 12 areas is connected to one of the water inlet connecting pipes (8); The first blocking transverse plate (17), the second blocking transverse plate (18) and the third blocking transverse plate (19) are equidistant from each other and are respectively arranged below the first water level regulating pipe (11), the second water level regulating pipe (7) and the third water level regulating pipe (12); the first blocking vertical plate (20) and the second blocking vertical plate (21) divide each partition (1) into equal parts in the horizontal direction.

2. The simulated groundwater depth control experimental device according to claim 1, characterized in that: The pressure water storage area of ​​the partition (1) is filled with crushed stones.

3. The simulated groundwater depth control experimental device according to claim 1, characterized in that: A water level observation well (4) is provided inwardly from the center of the test area (5).

4. A method for using a simulated groundwater depth control experimental device, using the simulated groundwater depth control experimental device according to any one of claims 1 to 3, characterized in that: The steps include: When the water supply is controlled and the water level rises: S1: Open the water inlet pipe (10), close the drain pipe (9), and inject water into the water level control area (6) through the water inlet pipe (10); S2: The water level control area (6) injects water into the pressure water storage area in the inner cavity of the partition (1), and the water in the pressure water storage area flows into the soil in the test area (5) through the water outlet holes (2) on the inner plate of the partition (1); S3: Observe the water level in the soil through the water level observation well (4). When the water level in the observation well reaches a preset level, close the water inlet pipe (10); When drainage is controlled and the water level drops: S4: Close the water inlet pipe (10) and open the drainage pipe (9). The water in the soil of the test area (5) is discharged through channel 1: the coarse stone layer (14), the crushed stone layer (15), the fine sand layer (16) and the drainage pipe (9) at the bottom. Channel 2: the water in the water level control area (6) flows out through the drainage hole, the drainage pipe (9) and the drainage outlet. The water level in the water level control area (6) drops. The water in the test area (5) flows into the control area, and the water level in the test area (5) drops.

5. The method according to claim 4, wherein In S2: water is injected into each of the plurality of pressure water storage areas divided inside the partition (1).

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