CN112857737A - Simulation test method for submersible complete well - Google Patents
Simulation test method for submersible complete well Download PDFInfo
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Abstract
A simulation test method for a complete submersible well comprises a test box, wherein two lifting platforms are arranged on two sides of the test box respectively, first water tanks are arranged on the lifting platforms respectively, the two first water tanks are communicated with two ends of the bottom of the test box through first pipelines respectively, valves are arranged on the first pipelines respectively, and one side of the test box is communicated with a pressure measuring pipe. The invention can simulate the water pumping and recharging process of a pressure-bearing complete well and a diving complete well by adopting different filling steps in the test box body, and the two wells are the most commonly encountered types in engineering.
Description
This patent is application number "201910389599.5"; the name of the divisional application of the well group pumping and recharging simulation test device and the method.
Technical Field
The invention relates to a simulation test method for a complete submersible well.
Background
The problems of pumping and recharging underground water are widely applied to projects such as foundation pit dewatering, underground water source heat pumps, water taking from motor-pumped wells in North China plain and the like. In order to research the movement law of underground water in the pumping and recharging process of a single well or a well group, field pumping and recharging tests are often adopted in engineering. However, the method has high test cost, opaque test process and less available test parameters. In addition, an indoor test device capable of simulating water pumping and recharging tests under various conditions is also urgently needed in the learning of the hydrogeology related courses. Therefore, the test device capable of simulating the pumping and recharging of the well group under various conditions has high practical value.
Some devices are available for water pumping and recharging related tests. For example, the pressure-bearing whole well water pumping simulation device disclosed in the Chinese invention patent (application publication number: CN 100446052C) can simulate the stable seepage of underground pressure-bearing water to a whole well when pumping water, and the cross section of the simulation cavity is in a fan shape. The water pumping simulation device for the submersible whole well disclosed by the Chinese invention patent (application publication number: CN 100568318C) can simulate the process of stable seepage to the whole well when underground submersible is used for pumping water, and the cross section of the simulation cavity is in a sector shape. The invention discloses a single-well injection-water pumping tracing experiment simulation analysis system disclosed in Chinese invention patent (application publication number: CN 107462497A), which can perform the test of a single-well recharge-water pumping tracing experiment with high precision and high frequency, and the test box body is fan-shaped.
It can be found that the existing test device can only perform single-type single-well pumping or recharging tests on one hand, however, in practical engineering, well groups are usually adopted for pumping and recharging, the arrangement mode is flexible and changeable, and the existing patent cannot realize simulation tests on the well groups of the type; on the other hand, the existing test box body is fan-shaped, and the fan-shaped test box only can simulate the water flow process in a certain direction, and can not comprehensively and truly reflect the flow characteristics in all directions under the actual condition.
Disclosure of Invention
The invention aims to provide a simulation test method for a complete submersible well, which can not only simulate a well group simulation test in actual engineering, but also more comprehensively and truly reflect the flowing characteristics of water flow in all directions under actual conditions.
In order to solve the above problems, the technical solution to be solved by the present invention is:
well crowd draws back and irritates analogue test device, including the proof box, the proof box both sides are equipped with a lift platform respectively, all are equipped with first water tank on each lift platform, and two first water tanks all install the valve through first pipeline switch-on proof box bottom both ends respectively on each first pipeline, switch-on in the pressure-measuring pipe in proof box one side.
An overflow pipe is communicated with each first water tank.
Be equipped with the mounted frame on the proof box, the interval is provided with the multiunit floral tube in the proof box, every group floral tube comprises arranging the many floral tubes that set up in proper order, the even mounted frame in each floral tube upper end is connected, all be equipped with the second pipeline in each floral tube, still include a plurality of second water tanks, all communicate at each second water tank lower extreme has the third pipeline, the second pipeline in each group floral tube is put through with each third pipeline respectively, all install suction pump and flowmeter on each third pipeline.
A plurality of pressure sensors are installed at the bottom of the test box, and each pressure sensor is electrically connected with the data acquisition unit 7 through a data line.
Comprises the following steps;
filling sand soil at the lower part of a test box to serve as a confined aquifer, then filling clay on the confined aquifer to serve as a water-resisting layer, and finally filling miscellaneous filling soil on the water-resisting layer to serve as a diving layer, wherein the lower end of a floral tube is required to be positioned in the confined aquifer;
secondly, after the same mass of water is injected into each first water tank, the height of each first water tank is adjusted through each lifting platform, so that the water level of each first water tank forms a certain height difference, the hydraulic gradient in the test box meets the requirement, the height of the higher first water tank is H, the height of the lower first water tank is H, the length of the test box is L, and the hydraulic gradient in the test box is (H-H)/L;
thirdly, opening valves on the first pipelines to enable water to gradually enter a confined aquifer of the test box to enable the water to form confined water, then slowly injecting water from the upper part of the test box, and observing the piezometer tube in real time to enable the diving water level of the upper layer to reach the design requirement;
fourthly, opening the water suction pumps on the third pipelines at one end of the test box, simultaneously filling water into the third pipelines at the other end of the test box, starting to perform a pumping-back well group simulation test, simultaneously recording the flow and the flow speed of each flowmeter, and recording the pressure distribution and the change condition in the test body in real time by using a pressure sensor;
and fifthly, after the test is finished, draining the water in the test box.
A simulation test method for a complete diving well by using a well group pumping and recharging simulation test device comprises the following steps;
step one, filling fine sand or medium coarse sand in a test box body in a layered mode;
secondly, after the same mass of water is injected into each first water tank, the height of each first water tank is adjusted through each lifting platform, so that the water level of each first water tank forms a certain height difference, the hydraulic gradient in the test box meets the requirement, the height of the higher first water tank is H, the height of the lower first water tank is H, the length of the test box is L, and the hydraulic gradient in the test box is (H-H)/L;
thirdly, opening valves on the first pipelines to enable water to gradually enter the test box, and observing the piezometric tube in real time to enable the upper-layer diving water level to meet design requirements;
fourthly, opening the water suction pumps on the third pipelines at one end of the test box, simultaneously filling water into the third pipelines at the other end of the test box, starting to perform a pumping-back well group simulation test, simultaneously recording the flow and the flow speed of each flowmeter, and recording the pressure distribution and the change condition in the test body in real time by using a pressure sensor;
and fifthly, after the test is finished, draining the water in the test box.
The invention has the technical effects that:
by adopting different filling steps in the test box body, the water pumping and recharging processes of a pressure-bearing complete well and a submersible complete well can be simulated, and the two wells are the most frequently encountered types in engineering;
the test box body is filled with fillers of different types and particle sizes, so that the water pumping and recharging process under various geological conditions can be simulated;
the pumping well and the recharging well can be adjusted according to needs, including increasing and decreasing the number of wells, changing the types of wells, adjusting the positions of wells, adjusting the sizes of wells and the like, so that the purpose of performing various tests by adopting one set of equipment is achieved;
the left water tank and the right water tank are respectively arranged on the left lifting table and the right lifting table, and water pumping and recharging tests under different hydraulic gradient conditions can be carried out by adjusting the left lifting table and the right lifting table;
the left water tank controls the water level through the first water inlet pipe and the left water level adjusting pipe, and the right water tank controls the water level through the second water inlet pipe and the right water level adjusting pipe, so that the water levels of the left water tank and the right water tank are kept unchanged, and the hydraulic gradient in the sand box is kept constant during the test;
the flow, flow rate, water pressure and other parameters in the test can be acquired in real time through the pumping well flowmeter, the recharging well flowmeter and the pressure sensor, so that pressure distribution characteristic data around a well group under different pumping and recharging rates and different well group distribution conditions can be acquired.
Drawings
The invention is further described below with reference to the accompanying drawings:
figure 1 is a schematic structural view of the present invention,
FIG. 2 is a schematic view of the structure of the floral tube of the present invention,
FIG. 3 is a schematic top view of the floral tube of the present invention,
fig. 4 is a schematic structural diagram of the pressure sensor according to the present invention.
In the figure: the device comprises a test box 1, a lifting platform 2, a first water tank 3, a second water tank 4, a floral tube 5, a pressure sensor 6, a data collector 7, a suspension bracket 8, a pressure measuring tube 9, a first pipeline 31, a valve 32, an overflow tube 33, a third pipeline 41, a water suction pump 42, a flowmeter 43 and a second pipeline 44.
Detailed Description
As shown in fig. 1 to 4, well group pumping and recharging simulation test device, including rectangle proof box 1, proof box 1 both sides are equipped with a lift platform 2 respectively, all be equipped with first water tank 3 on each lift platform 2, two first water tanks 3 are respectively through first pipeline 31 switch-on proof box 1 bottom both ends, all install valve 32 on each first pipeline 31, switch-on is at pressure-measuring pipe 9 in proof box 1 one side, be equipped with the scale mark on pressure-measuring pipe 9, the scale mark is used for observing proof box 1 well water level, also can make proof box 1 use transparent ya keli board or toughened glass board in addition, make it can be experimental in-process visual observation to the flow condition of proof box 1 well water, also can observe the water level equally.
An overflow pipe 33 is connected to each first tank 3. The overflow pipe 33 functions to keep the water level in the two first water tanks 3 uniform.
Be equipped with mounted frame 8 on proof box 1, the interval is provided with the multiunit stainless steel floral tube in proof box 1, every group floral tube is by arranging many floral tubes 5 that set up in proper order and constitute, each floral tube 5 upper end all is connected with mounted frame 8, all be equipped with second pipeline 44 in each floral tube 5, still include a plurality of second water tanks 4, all communicate at each second water tank 4 lower extreme has third pipeline 41, second pipeline 44 in each group floral tube is put through with each third pipeline 41 respectively, all install suction pump 42 and flowmeter 43 on each third pipeline 41.
A plurality of pressure sensors 6 are arranged at the bottom of the test box 1, and each pressure sensor 6 is electrically connected with a data acquisition unit 7 through a data line. The pressure sensor 6 adopts an SXX series pressure gauge produced by the water conservancy hydrological automation research institute of Nanjing of the department of Water conservancy, and the data collector 7 adopts a dataTaker DT500 series data collector 7 produced by Australian corporation of Saimer Feishell science and technology. The flow meter 43 is an LDG electromagnetic flow meter 43 manufactured by shanghai speed control automation instruments ltd.
A simulation test method for a pressure-bearing complete well by using a well group pumping and recharging simulation test device comprises the following steps;
firstly, filling sandy soil permeable soil bodies at the lower part of a test box 1 as a confined aquifer, then filling weak permeable or impermeable soil bodies such as clay and the like on the confined aquifer as a water barrier, and finally filling miscellaneous filling soil on the water barrier as a diving layer, wherein the floral tubes 5 are required to be completely positioned in the confined aquifer;
secondly, after the same quality of water is injected into each first water tank 3, the height of each first water tank 3 is adjusted through each lifting platform 2, so that a certain height difference is formed by the water level of each first water tank 3, and the hydraulic gradient in the test box 1 meets the requirement, wherein the height of the higher first water tank 3 is H1, the height of the lower first water tank 3 is H2, the length of the test box 1 is L, and the hydraulic gradient in the test box 1 is (H1-H2)/L; by adjusting the heights of the two lifting platforms 2, water pumping and recharging tests under different hydraulic gradient conditions can be performed;
thirdly, opening valves 32 on the first pipelines 31 to enable water to gradually enter a confined aquifer of the test box 1 to enable the water to form confined water, then slowly injecting water from the upper part of the test box 1, and observing the piezometric tube 9 in real time to enable the diving water level of the upper layer to reach the design requirement;
fourthly, opening the water suction pumps 42 on the third pipelines 41 at one end of the test box 1, simultaneously filling water into the third pipelines 41 at the other end of the test box 1, starting to perform a pumping-back well group simulation test, simultaneously recording the flow and the flow speed of each flowmeter 43, and recording the pressure distribution and the change condition in the test body in real time by using the pressure sensor 6;
and fifthly, after the test is finished, draining the water in the test chamber 1.
Therefore, the pumping well flowmeter 43, the recharging well flowmeter 43 and the pressure sensor 6 can be used for realizing the real-time acquisition of parameters such as flow, flow speed, water pressure and the like in a test, so that the pressure distribution characteristic data of the periphery of a well group under different pumping and recharging speeds and different well group distribution conditions can be acquired.
A simulation test method for a complete diving well by using a well group pumping and recharging simulation test device comprises the following steps;
step one, filling fine sand or medium coarse sand in a test box 1 body in a layered mode;
secondly, after the same quality of water is injected into each first water tank 3, the height of each first water tank 3 is adjusted through each lifting platform 2, so that a certain height difference is formed by the water level of each first water tank 3, and the hydraulic gradient in the test box 1 meets the requirement, wherein the height of the higher first water tank 3 is H1, the height of the lower first water tank 3 is H2, the length of the test box 1 is L, and the hydraulic gradient in the test box 1 is (H1-H2)/L;
thirdly, opening valves 32 on the first pipelines 31 to enable water to gradually enter the test box 1, and observing the piezometric tube 9 in real time to enable the upper-layer diving water level to meet the design requirement;
fourthly, opening the water suction pumps 42 on the third pipelines 41 at one end of the test box 1, simultaneously filling water into the third pipelines 41 at the other end of the test box 1, starting to perform a pumping-back well group simulation test, simultaneously recording the flow and the flow speed of each flowmeter 43, and recording the pressure distribution and the change condition in the test body in real time by using the pressure sensor 6;
and fifthly, after the test is finished, draining the water in the test chamber 1.
Claims (1)
1. A simulation test method for a submersible whole well is characterized by comprising the following steps:
the device comprises a simulation test device, wherein the simulation test device comprises a test box (1), two lifting platforms (2) are respectively arranged on two sides of the test box (1), first water tanks (3) are respectively arranged on the lifting platforms (2), the two first water tanks (3) are respectively communicated with two ends of the bottom of the test box (1) through first pipelines (31), valves (32) are respectively arranged on the first pipelines (31), and a pressure measuring pipe (9) is communicated with one side of the test box (1);
an overflow pipe (33) is communicated with each first water tank (3); the test box comprises a test box body (1), a suspension frame (8) is arranged on the test box body (1), a plurality of groups of floral tubes are arranged in the test box body (1) at intervals, each group of floral tubes is composed of a plurality of floral tubes (5) which are sequentially arranged, the upper ends of the floral tubes (5) are connected with the suspension frame (8), second pipelines (44) are arranged in the floral tubes (5), a plurality of second water tanks (4) are further included, third pipelines (41) are communicated with the lower ends of the second water tanks (4), the second pipelines (44) in the floral tubes are communicated with the third pipelines (41), and water suction pumps (42) and flow meters (43) are mounted on the third pipelines (41); the bottom of the test box (1) is provided with a plurality of pressure sensors (6), and each pressure sensor (6) is electrically connected with a data acquisition unit (7) through a data line;
comprises the following steps;
step one, fine sand or medium coarse sand is filled in a test box (1) body in a layered mode;
secondly, after the same quality of water is injected into each first water tank (3), the height of each first water tank (3) is adjusted through each lifting platform (2), so that the water level of each first water tank (3) forms a certain height difference, the hydraulic gradient in the test box (1) meets the requirement, the height of the higher first water tank (3) is H1, the height of the lower first water tank (3) is H2, the length of the test box (1) is L, and the hydraulic gradient in the test box (1) is (H1-H2)/L;
thirdly, opening valves (32) on the first pipelines (31) to enable water to gradually enter the test box (1), and observing the piezometric tube (9) in real time to enable the upper-layer diving water level to meet the design requirement;
fourthly, opening the water suction pumps (42) on the third pipelines (41) at one end of the test box (1), simultaneously filling water into the third pipelines (41) at the other end of the test box (1), starting to perform a pumping-back well group simulation test, simultaneously recording the flow and the flow velocity of each flowmeter (43), and recording the pressure distribution and the change condition in the test body in real time by using the pressure sensor (6);
and fifthly, after the test is finished, draining the water in the test chamber (1).
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| CN114923661A (en) * | 2022-05-01 | 2022-08-19 | 长江水利委员会长江科学院 | Radial well flow test system and method for implanted relief well |
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| CN115565441B (en) * | 2022-09-28 | 2024-07-09 | 中国地质大学（武汉） | Experimental device and experimental method for simulating underground water radial recharging |
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| CN110108445B (en) | 2021-03-09 |
| CN110108445A (en) | 2019-08-09 |
| CN112857737B (en) | 2022-07-01 |
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