CN100568318C - Pumping simulator for completely penetrating well under water - Google Patents

Abstract

The complete submersible well pumping simulation device of the present invention comprises a water storage tank with a water pump and a simulation tank. In the simulation tank, there are a water supply chamber, a simulation chamber with an aquifer, and a pumping well. The cross-sectional shape of the simulation chamber is fan-shaped, and the simulation chamber and the water supply chamber , There is a permeable mesh plate between the simulation chamber and the pumping well, and the overflow return chamber in the fixed head overflow tank at the upstream end communicates with the water storage tank through the overflow pipe, and the overflow tank is respectively connected with the water storage tank water pump and water supply through the pipeline. The cavity is connected, and the overflow return cavity in the pumping overflow tank at the downstream end is connected with the water storage tank through the pumping overflow flow measuring tube, and the overflow tank is connected with the pumping hole in the pumping well through a pipe, and at least three sets of pressure measuring glass tubes are vertical Installed on the wall of the simulated cavity, one end of the pressure measuring hose respectively connected with the bottom of the pressure measuring tube passes through the wall of the simulated cavity and is inserted into the aquifer. It can determine the hydrogeological parameters and calculate the water output of the aquifer, and clearly show the groundwater seepage state, aquifer and pumping well structure that cannot be observed in nature.

Description

Submersible complete well pumping simulation device

Technical field:

The invention is related to a submersible complete well pumping simulation device for studying groundwater movement laws.

Background technique:

When studying groundwater movement, mathematical methods are often used. The premise is to solve the aquifer or aquifer system under a series of generalization and restriction conditions. If these generalizations and restriction conditions can still reflect the main characteristics of the actual aquifer features, then a mathematically analytical solution is available.

But for the actual aquifer, if its heterogeneity, anisotropy and complex boundary geometry do not allow too much generalization, then the mathematical method is difficult to apply, and the mathematical method is relatively abstract, making it difficult for beginners to understand . Therefore, the simulation method is used to study the law of groundwater movement under complex conditions. Among them, physical simulation is a commonly used method. In recent years, because production units are busy completing their own production tasks, it is difficult to accept college teachers and students for scientific research and on-site teaching practice, and the field pumping test costs a lot, so it is necessary to strengthen scientific research and practical teaching in the laboratory to make up for the Insufficient field test and practice. In particular, some similar simulations of Wenshui geological entities and groundwater seepage experiments.

Pumping test is one of the important work contents in the field of hydrogeology, which can determine the hydrogeological parameters and calculate the water yield of the aquifer. The above parameters and the water output of the aquifer are essential and important information for the evaluation of groundwater resources, the establishment of teaching models for groundwater environmental capacity and pollution prediction and evaluation.

Invention content:

The purpose of the present invention is to provide a physical model for simulating and studying the steady seepage of subterranean water to complete wells when pumping water, which can determine the hydrogeological parameters and calculate the water yield of the aquifer, and clearly show the seepage state of groundwater that cannot be observed in nature, Submersible complete well pumping simulation device for aquifer and pumping well structure.

The pumping simulation device for a submersible complete well of the present invention comprises a water storage tank with a water pump and a simulation box whose bottom plate is kept horizontal. In the simulation box, there are a water supply chamber with a water supply hole, a simulation chamber with an aquifer, a pumping well with a water pumping hole, and a simulation chamber. The cross-sectional shape is fan-shaped, there is a permeable mesh plate between the simulation chamber and the water supply chamber, and between the simulation chamber and the pumping well. The return chamber has an overflow hole that communicates with the water storage tank through the pipeline, and the overflow tank of the constant head overflow tank has a water inlet hole and a water outlet hole that are respectively connected with the water storage tank pump and the water supply chamber through pipelines. In the pumping overflow tank with overflow tank at the downstream end, the overflow return cavity located outside the overflow tank has an overflow hole that communicates with the water storage tank through the overflow measuring pipe, and the overflow tank of the pumping overflow tank has an overflow hole that passes through the overflow tank. The water inlet hole where the pipe is connected to the pumping hole in the pumping well, at least three sets of piezometric tubes are vertically installed on the wall of the simulated chamber, and one end of the pressure measuring hose connected to the bottom of the piezometer tube is inserted through the wall of the simulated chamber in the aquifer.

The cross-sectional shape of the above-mentioned simulation cavity is fan-shaped with a central angle of 18° or 20°, which makes the length and width of the simulation box reasonable, can display the seepage state of groundwater, and is easy to observe. The central angle can be appropriately enlarged or reduced according to needs.

The above-mentioned pressure measuring tubes are seven groups, which are arranged at equal intervals on the wall of the simulated cavity, and each group is three. The upper, middle and lower parts of the can display the shape of the water surface when pumping.

There are water level regulators capable of adjusting the heights of the constant head overflow box and the pumping overflow box at the upstream and downstream of the above simulation box respectively, so as to adjust the hydraulic gradient of the seepage water flow.

The above-mentioned water level regulator has threaded nuts and supports mounted on the upper and lower ends of the simulation box, and threaded lugs connected to the overflow box. One end of the adjusting screw passes through the threads on the nuts and lugs in sequence into the mount.

The above-mentioned aquifer thickness is at least 70 cm, which can meet the requirements of hydrogeological parameters obtained in the experiment.

The above-mentioned device has a flow meter communicated with the overflow flow tube.

Above-mentioned pumping well side wall is equipped with ruler, is convenient to observe the water level in the pumping well.

The above-mentioned water supply cavity, simulation cavity and pumping well are separated by a permeable mesh plate, so that water is permeable and sand is not permeable.

The above-mentioned simulation box is made of transparent material, which is convenient for observing the structure of the aquifer and the seepage state of the groundwater.

The device of the present invention can simulate homogeneous and isotropic aquifers with standard quartz sand with a particle size of 0.5-1 mm (or samples from aquifers in the field as required).

The constant head overflow box is located outside the upstream of the simulation box, and the constant water overflow height can be adjusted to meet the requirements of different water heads in the experiment. The overflow tank is connected with the water supply chamber through pipes to form a unified hydrodynamic field. The overflow tank It is connected to the water pump in the water storage tank through a pipeline. The excess experimental water is returned to the water storage tank through the overflow pipe. Through this water supply system, a stable water flow of different water heads can be obtained to meet the needs of the experiment.

The pumping well is located downstream of the simulation cavity, and the groundwater flowing through the simulated aquifer can enter the pumping well evenly. At the same time, there is a scale on the side of the pumping well, which can measure and read the water level at any time.

The pumping overflow tank is located outside the downstream of the simulation chamber, where the overflow tank is connected with the pumping well through pipes to form a unified hydraulic dynamic field, and the pumped groundwater returns to the water storage tank through the overflow and flow measuring pipes connected with the overflow return chamber In the process, a container can also be introduced to measure its flow rate or connected to a low-head high-precision flowmeter to measure the flow rate. The height of the pumping overflow box can be adjusted up and down to meet the water level and flow rate of the stable pumping well in the experiment.

In the present invention, the water level regulator can control the water surface in the model to be a horizontal plane or an inclined plane with different inclination angles.

In the present invention, the piezometric tubes are used to display the water head values of the corresponding piezometric sections in the well flow test area, and the piezometric tubes are also equivalent to the water level observation holes arranged along the seepage direction of the pumping wells.

Whether it is the natural groundwater movement to the phreatic well or the movement of the groundwater to the phreatic well in the model, it is in line with the Qiubui well flow theory, and the related parameters can be solved by the Qiubui well flow formula.

The pumping simulation device of the submersible complete well of the present invention strictly follows the Qiubuyi well flow theory:

(1) Use standard quartz sand with a particle size of 0.5-1 mm (or samples from field aquifers as required) to simulate a homogeneous and isotropic aquifer. The waterproof bottom plate is level.

(2) Use the water level regulator of the fixed head water level regulator and the water level regulator of the pumping well to control the water surface as a horizontal plane and an inclined plane.

(3) During the test, there is no water supply and discharge along the way, and the flow rate of each water crossing section remains unchanged. On the circumference of the influence radius, the water supply chamber is controlled by the overflowable water level regulator to be the supply boundary of constant water head.

(4) The thickness of the designed aquifer is at least 70cm, and at least three water level drawdown tests can be carried out, each drawdown is 5cm, so that the hydraulic gradient near the well can be controlled to be less than 1/4, and the near two-dimensional flow can be approximated.

The device of the present invention follows the principle of similar simulation;

(1) Geometric similarity

The device of the present invention is proportional to all length elements in the natural percolation zone. If a _l is used to represent the length proportional coefficient, then there is

${\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; l</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}}}{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}}}{{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}}}{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}}}{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}$

Among them, L _N , B _N , and M _N represent the length, width, and thickness of the natural seepage area, L _M , B _M , and M _M represent the length, width, and thickness of the seepage model, H _N is the natural seepage head, and H _M is the seepage Model the water head.

The device of the present invention that satisfies the formula will keep the geometric similarity with the seepage area in nature.

(2) similar power

That is, the nature of the force experienced by the device of the present invention and the corresponding liquid particle in seepage in nature is the same, and a certain ratio is maintained.

Since most seepage in nature is laminar flow, the viscous force plays a major role in the flow of groundwater, while the inertial force is much smaller than the viscous force and can be ignored. Therefore, as long as the seepage in the model is also kept laminar.

(3) The boundary conditions are consistent

When pumping water from a complete submerged well in nature, the water flows into the well from a 360° direction. If a 360° simulated well is built in the laboratory, it will occupy a large area, cost high, have poor visibility, and the test is difficult to control. In order to facilitate For the feasibility of observation and experiment, 1/18 or 1/20 of the 360° well is cut, that is, a fan-shaped block of 20° or 18° is used as the simulation object, and the law of groundwater movement in it is the same as that in the 360° well. The rules are consistent, and it is also convenient to observe the structure of the aquifer and the pumping well, the circulation path of the groundwater and the movement elements, and it is convenient to control the experimental water flow to form the seepage state of the groundwater when the complete well is pumped. The measured flow is multiplied by 18 or 20 to represent the flow of the 360° well.

(4) The laws of motion are similar

That is to say, the track of the device of the present invention is similar to that of the corresponding liquid particle in seepage in nature, and the time required for the fluid particle to flow through the corresponding track segment should be in a certain proportion. The pumping simulation device of the submerged complete well simulates the water flow from drilling to the bottom of the aquifer (aquifer) flowing into the well from around the well. The water level and water output will reach a steady state, and a regular and stable descending funnel will be formed around the pumping well. The R of the funnel is called the radius of influence, and the water level drop in the well S is called the water level drawdown. The amount of water pumped from the well Q refers to the water yield of a single well.

Therefore, whether it is the natural groundwater movement to the phreatic well or the movement law of the groundwater to the phreatic well in the model, it is in line with the Chubuy well flow theory, and the relevant parameters can be solved by the Chubuy well flow formula.

The regularity of the steady movement of phreatic water to intact wells can be described by the Chubuy well flow formula:

$\mathrm{<span\; class="notranslate">\; Q</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1.366</span>}\mathrm{<span\; class="notranslate">\; K</span>}\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; S</span>}}{\mathrm{<span\; class="notranslate">\; lg</span>}\frac{\mathrm{<span\; class="notranslate">\; R</span>}}{\mathrm{<span\; class="notranslate">\; r</span>}}}$

In the formula: Q-diving well pumping capacity (cm ³ /s)

K-permeability coefficient (cm/s)

H-phreatic aquifer thickness (cm)

S-water drop in the well (cm)

R-radius of influence (cm)

r-well radius (cm)

The pumping simulation device for complete diving wells of the present invention is a physical model made by reducing the water pumping test of complete diving wells in the field according to a certain ratio. The movement elements in the well are observed, and then the observed results are amplified by a certain ratio to obtain the movement elements corresponding to the pumping of the natural diving complete well. The device of the invention can measure relevant hydrogeological parameters and calculate the water yield of the aquifer, and clearly show the seepage state that cannot be observed in nature, the structure of the aquifer and the pumping well. It provides an effective means for studying the movement of groundwater to submerged intact wells,

Description of drawings:

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a view along the direction A of Fig. 1 .

Fig. 3 is a view taken along direction B of Fig. 1 .

Fig. 4 is a C-C sectional view of Fig. 1 .

Detailed ways:

Referring to FIGS. 1 to 4 , a water pump 2 is installed in the water storage tank 1 . Simulation box 3 is contained on the support that is positioned at the top of water storage tank and bottom plate keeps level all the time. The walls of the simulation box are made of plexiglass. Two permeable mesh plates 4 separate the simulation box into a water supply chamber 5 and a pumping well 6 located upstream and downstream, and a simulation chamber 7 between the water supply chamber 5 and the pumping well 6 . The cross-sectional shape of the simulated cavity 7 is shown in FIG. 3 as a sector with a central angle α=20°, in which there is an aquifer 8 with a thickness of 70 cm. Seven groups of piezometric tubes 9 with scales 33 are vertically mounted on the wall of the simulated cavity at equal distances, and can measure the water levels of 7 aquifer sections. There are three equal-diameter pressure measuring tubes in each group, and the other ends of the three pressure measuring hoses 10 connected to the bottom of the pressure measuring tubes in each group respectively pass through the wall of the simulated chamber and insert into the upper, middle and bottom of the same section of the aquifer to measure Water level values for the upper, middle and lower parts of each aquifer section. There are nuts 13 and supports 14 installed on the upper and lower ends of the simulation box respectively in the water level regulator 11 and the water level regulator 12 of the overflow box of the pumping overflow box, which are located at the upper and lower reaches of the simulation box, and are connected with the overflow tank of the fixed head. The threaded lug 15 that box 26 or pumping overflow box 27 connects, the lower end of adjusting screw rod 16 is screwed through nut, lug successively and stretches in the bearing and can rotate, and the upper end of adjusting screw rod 17 is equipped with handwheel. The forward and reverse hand wheel drives the adjustment screw to rotate so that the lugs rotate up and down along the adjustment screw to adjust the height of the water level regulator. The bottom of the overflow tank 18 in the fixed water head overflow tank 26 has a water inlet 21 and a water outlet 22 that are communicated with the water storage tank water pump and the water supply cavity through the water suction pipe 19 and the water supply pipe 20 respectively. There is an overflow hole 24 at the bottom of the overflow return chamber 23 outside the overflow tank, and the other end of the constant water overflow pipe 25 communicated with the overflow hole 24 stretches in the water storage tank. Scale is housed on the pumping well side wall and pumping hole 34 is arranged at its bottom. The overflow tank inlet hole 35 in the pumping overflow box 27 is communicated with the pumping hole in the pumping well by the pipeline, and the overflow backwater cavity 28 bottom of the overflow tank has an overflow hole 29, and the overflow measuring hole that is communicated with the overflow hole 29 The other end of the flow tube 30 extends into the storage tank. The flow measuring tube 31 from the other end of the overflow measuring flow tube 30 is inserted into a low water head high-precision flowmeter 32 to measure the flow rate. The closed-loop water supply and drainage system consists of a water storage tank, a water pump, a water supply and pumping overflow tank with a fixed water head that can be raised and lowered. Through this system, the simulated aquifer can obtain experimental water with different water head stability. The experimental water returns to the water storage tank through the return pipeline, and the experimental water can be recycled without external water supply and drainage pipelines, which makes the structure of the device compact, occupies less land, is convenient to move, and saves the construction of high-level water towers and water supply and drainage pipelines Civil engineering costs and save a lot of experimental water. The cost and operation cost of the device are greatly reduced. The water head of this system is 3 meters, and the flow rate is 1L/s.

The device of this embodiment is a physical model of the hydrogeological entity whose groundwater moves completely and stably to the phreatic water when pumping water in the field as the model object, which is equivalent to 1/18 of a 360° well, that is, a fan-shaped block of 20°. The law of groundwater movement in it is consistent with the law of movement in 360° wells. It is also convenient to observe the structure of aquifers and pumping wells, groundwater circulation paths and movement elements, and can easily control the experimental water flow to form a complete diving well. Seepage state of groundwater during pumping. The measured flow q is multiplied by 18 to represent the flow Q of the 360° well:

Q=18=×q

In the formula: Q——Water output of a complete 360° diving well (cm ³ /s)

q——Water output of the complete 20° well after diving (cm ³ /s)

The pumping simulation of submerged complete wells is to observe the movement elements in the model, and the results are amplified in a certain proportion to obtain the corresponding movement elements of natural submerged complete wells. The present invention follows the principle of similar simulation. That is, the principles of geometric similarity, similarity in motion, similarity in dynamics, and similarity in boundaries.

When adopting the device of this embodiment to do the pumping test:

1. Turn on the power, open the water valve, and adjust the height of the overflow tank of the upstream fixed head so that the water level of the water supply chamber is slightly lower than the top surface of the aquifer. During the test, the water level of the water supply chamber is always kept constant.

2. Lower the pumping overflow box, so that the minimum water level drawdown S in the well formed for the first time is about 5cm. After the water level and flow of the piezometer are stable (note that there are no air bubbles or dead water in the piezometer), observe;

(1) The reason why the water level of each section changes during the flow process and the water level of each piezometric tube on the same vertical section is up and down.

(2) Comparative analysis of the difference in water level of each piezometric tube on the different sections of the upstream and downstream, the reason why the downstream is greater than the upstream.

(3) Carefully observe the groundwater seepage surface of the well wall above the well water level. If there is a water level difference inside and outside the well wall, this is caused by the hydraulic jump of the well.

3. Determination of instrument parameters and piezometer water level and flow.

(1) Measure the radius r _W of the pumping well, and the distance L ₁ ~ L ₇ from each section to the center of the pumping well, and record them.

(2) Read out the water level of each piezometric tube and record it.

(3) Keep the position of the overflow box of the pumping well in the water supply tank cavity unchanged, measure the flow at the outlet of the overflow box of the pumping well, and record the data.

(4) Flow rate measurement: Keep the water level of the water supply chamber unchanged, lower the water level of the pumping well twice, about 5cm each time, and repeat the operations of (2) and (3).

(5) Measuring the actual flow velocity of groundwater: Inject red tracer into the water supply chamber, observe and record the time to reach the 7th to 1st sections respectively.

4. Based on the measured flow rate Q, the thickness of the aquifer in the pumping well hw and the thickness of the aquifer in the seventh section F ₇ , use the Qiubuyi well flow formula to solve the permeability coefficient and record it. The well flow formula of Qiubuyi is;

$\mathrm{<span\; class="notranslate">\; Q</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1.366</span>}\mathrm{<span\; class="notranslate">\; K</span>}\frac{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; S</span>}}{\mathrm{<span\; class="notranslate">\; lg</span>}\frac{\mathrm{<span\; class="notranslate">\; R</span>}}{\mathrm{<span\; class="notranslate">\; r</span>}}}$

In the formula: Q——Water output of complete diving well (cm ³ /s)

K——seepage coefficient (cm/s)

H——thickness of phreatic aquifer (cm)

S——Water level drawdown in the well (cm)

R——Influence radius of the drop funnel (cm)

r _w —— well radius (cm)

5. According to the average water level in the observation holes of sections h ₇ and h ₁ , calculate the aquifer thickness of the 6th to 2nd sections according to the hydraulic head equation, and record them.

The head equation is:

${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; =</span>\sqrt{\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="7"\; label="h"\; filenames="C2006100213120014H1.png,C2006100213120015H1.png"\; state="\{\{state\}\}">h</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 7</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="h"\; filenames="C2006100213120012H1.png,C2006100213120013H1.png"\; state="\{\{state\}\}">h</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; ln</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; ln</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="7"\; label="r"\; filenames="C2006100213120014H1.png,C2006100213120015H1.png"\; state="\{\{state\}\}">r</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 7</span>}}<span\; class="notranslate">\; /</span>{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; cm</span>}<span\; class="notranslate">\; )</span>}$

In the formula: h ₁ ——water head value of any section

h ₇ ——water head value of the aquifer at the most upstream section

h ₁ ——water head value of aquifer at the most downstream section (cm)

r ₇ ——the distance from the observation hole of the most upstream section to the center of the pumping well (cm)

r ₁ ——the distance from the observation hole of the most downstream section to the center of the pumping well (cm)

Since the aquifer floor is horizontal, the aquifer thickness reading is the same as the aquifer head value in the formula. Through the device of this embodiment, it is possible to observe the seepage state of the groundwater during the pumping process, and verify the Chubuyi well flow formula. Solve the relevant parameters of the aquifer through the measured data.

The above-mentioned embodiments are to further illustrate the above-mentioned content of the present invention, but it should not be understood that the scope of the above-mentioned subject of the present invention is limited to the above-mentioned embodiments. All technologies implemented based on the above content belong to the scope of the present invention.

Claims (10)

1, pumping simulator for completely penetrating well under water, it is characterized in that comprising the reserve tank of being with water pump, base plate keeps the simulation box of level, the water supply chamber that contains water supply hole is arranged in the simulation box, the simulation chamber that the water-bearing zone is arranged, the pumped well that contains suction eye, the shape of cross section in simulation chamber is fan-shaped, simulation chamber and water supply chamber, between simulation chamber and the pumped well permeable mesh plate is arranged, the head spill box of deciding that overflow groove is arranged that is arranged in the simulation box upstream extremity is positioned at the outer water cavity that overflows back of overflow groove the spout hole that communicates with reserve tank by run-down pipe is arranged, deciding has the inlet opening that communicates with reserve tank water pump and water supply chamber respectively by pipeline in the overflow groove of head spill box, apopore, the spill box that draws water that overflow groove is arranged that is arranged in simulation case downstream is positioned at the outer water cavity that overflows back of overflow groove the spout hole that communicates with reserve tank by the overflow flow tube, drawing water has the inlet opening that is communicated with suction eye in the pumped well by pipeline in the overflow groove of spill box, at least three group piezometric tube vertically are contained on the wall of simulation chamber, and an end of the pressure measurement flexible pipe that is communicated with the piezometric tube bottom passes in the wall insertion water-bearing zone, simulation chamber respectively.

2, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that simulating the chamber shape of cross section and is central angle and be the fan-shaped of 18 ° or 20 °.

3, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2, it is characterized in that piezometric tube is seven groups, spaced set is on the wall of simulation chamber, every group of piezometric tube is three, top, middle part, bottom that the other end of three pressure measurement flexible pipes that are communicated with every group of piezometric tube bottom inserts the same section in water-bearing zone respectively.

4, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that simulation box upstream and downstream places has respectively can regulate the water-level regulator of deciding the head spill box, drawing water the spill box height.

5, pumping simulator for completely penetrating well under water as claimed in claim 4, it is characterized in that having in the water-level regulator the threaded nut, the bearing that are contained in the simulation box upper and lower end, the threaded journal stirrup that is connected with spill box, adjusting screw(rod) one end pass the screw thread on nut, the journal stirrup successively and stretch in the bearing and can rotate.

6, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that water-bearing zone thickness is at least 70cm.

7, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that the flowmeter that is communicated with the overflow flow tube is arranged.

8, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that the pumped well sidewall is equipped with scale.

9, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 adopts permeable mesh plate to isolate between the chamber that it is characterized in that supplying water, simulation chamber, pumped well.

10, pumping simulator for completely penetrating well under water as claimed in claim 1 or 2 is characterized in that simulation box adopts transparent material to make.

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