CN217055130U - Pressure-bearing artesian well drainage test device - Google Patents
Pressure-bearing artesian well drainage test device Download PDFInfo
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- CN217055130U CN217055130U CN202220373123.XU CN202220373123U CN217055130U CN 217055130 U CN217055130 U CN 217055130U CN 202220373123 U CN202220373123 U CN 202220373123U CN 217055130 U CN217055130 U CN 217055130U
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 238000012545 processing Methods 0.000 claims abstract description 10
- 235000020681 well water Nutrition 0.000 claims 2
- 239000002349 well water Substances 0.000 claims 2
- 239000011435 rock Substances 0.000 abstract description 10
- 230000003204 osmotic effect Effects 0.000 abstract description 3
- 238000010998 test method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 14
- 230000035699 permeability Effects 0.000 description 11
- 238000005086 pumping Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a pressure-bearing artesian well test device that drains, include: the water supply system comprises a water supply pipe, a water discharge control valve, a turbine flowmeter, a pressure gauge, a data collector and a processing terminal, wherein the water supply pipe penetrates through a weak permeable layer to enter a confined aquifer, the pressure gauge, the water discharge control valve and the turbine flowmeter are sequentially arranged on the water supply pipe, and the data collector is respectively connected with the pressure gauge and the turbine flowmeter. The utility model discloses the little low cost of test method engineering volume can be quicker more accurate test obtain rock mass osmotic coefficient.
Description
Technical Field
The utility model relates to an engineering geology reconnaissance hydrogeology test technical field. More specifically speaking, the utility model relates to a pressure-bearing artesian well test device that drains.
Background
In the field of engineering geological exploration of water conservancy and hydropower dams, water delivery tunnels, traffic tunnels and the like, when an engineering construction area relates to a karst aquifer, karst, crack development degree and water permeability evaluation are generally carried out on building foundation rock-soil bodies, basic rock bodies and rock bodies serving as rock mass media of the dam bodies and tunnel bodies; when the permeability of a karst aquifer needs to be quantitatively analyzed in engineering geology and hydrogeology exploration, the water conductivity coefficient (T) and the permeability coefficient (K) of an aquifer medium are usually tested, and a field drilling and pumping test is a commonly used method at present. When the aperture of the drill hole is small, a high-power water suction pump cannot be placed in the drill hole, so that a water pumping test cannot be carried out, and only a water drainage test can be adopted.
The water discharge test is a hydrogeological test method which utilizes the advantage that the elevation of an orifice (water burst point) is lower than the elevation of the water level of underground water to enable water to freely overflow the orifice and simultaneously observe the flow rate and the water level change conditions of a water discharge hole and an observation hole. The test is a test without using a water pumping device to reduce the water head, but the principle of the test is the same as that of the water pumping test, and the test can be divided into a ground water drainage test and a mine underground water drainage test. The water discharge test is mainly used for measuring the hydrogeological parameters of the aquifer: the water conductivity coefficient (T) and the permeability coefficient (K) are evaluated, the water-rich property of the aquifer is evaluated, the hydrogeological conditions of the deposit are found out, and a basis is provided for predicting the water inflow of the tunnel and the mine (pit) and determining a method for preventing and utilizing the underground water. At present, a fixed-depth-lowering water discharge test is generally adopted in engineering, parameters are obtained through an empirical formula, the method is complex to operate and low in precision, and a simple and portable field water discharge experimental device easy to operate is absent in the market.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model discloses the monitoring well testing device who utilizes this design carries out the monitoring of high accuracy to the condition of data such as drilling water pressure along with time variation in the discharge test in-process discharge flow of water, the hydrographic geological parameters such as osmotic coefficient, be accurate quick water guide coefficient (T) who acquires the confined aquifer medium, osmotic coefficient (K), evaluation karst area rock stratum karst crack, the permeability of karst cave development degree and confined aquifer provides conveniently.
In order to realize according to the utility model discloses these objects and other advantages provide a pressure-bearing artesian well test device that drains, include: the water supply system comprises a water delivery pipe, a water drainage control valve, a turbine flowmeter, a pressure gauge, a data collector and a processing terminal, wherein the water delivery pipe penetrates through a weak permeable layer to enter a confined aquifer, the pressure gauge, the water drainage control valve and the turbine flowmeter are sequentially arranged on the water delivery pipe, and the data collector is respectively connected with the pressure gauge and the turbine flowmeter.
Preferably, the method further comprises: the sleeve is sleeved on the water conveying pipe in the weak permeable layer, and the inner diameter of the sleeve is matched with the outer diameter of the water conveying pipe.
Preferably, the upper end of the sleeve is fixedly connected with the water conveying pipe in a grouting mode.
The utility model discloses at least, include following beneficial effect:
the water discharge test device for the pressure-bearing artesian well solves the problem that when a drill hole in a karst region meets the pressure-bearing artesian well, the hydrogeological parameters of a water-bearing stratum are obtained through a water discharge test to work, and greatly improves the testing precision and efficiency of the work;
selecting proper flow to drain water at constant flow or variable flow according to actual test conditions by using a variable flow drain control valve, and automatically monitoring and storing drain flow data;
the method comprises the steps of storing change data of pressure-bearing water pressure in a water discharging process, and converting the data into depth reduction data of a pressure-bearing water column;
a water pumping test module in data analysis software is used for converting a water drainage test into a water pumping test for processing, hydrogeological parameters of a confined aquifer are quickly and accurately obtained, the overall precision and efficiency of test work are improved, and a large amount of labor cost can be saved;
the device has the advantages of small test method, low engineering quantity, low cost, no influence on local environment, suitability for wide application in the drainage test work of the confined aquifer and great market value.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the pressure-bearing artesian well drainage test device of the present invention;
FIG. 2 is a simulated diagram of the pressure-bearing water level before and after the water discharge test of the utility model;
FIG. 3 is a graph showing the time-dependent change of the water-drainage depth during the water-drainage test;
fig. 4 is a fitting graph of the actual measurement curve and the standard curve of the water discharge test of the present invention.
Reference numerals are as follows: the system comprises a pressure gauge 1, a water discharge control valve 2, a turbine flowmeter 3, a data collector 4, a processing terminal 5, a permeable aquifer 6 and a confined aquifer 7.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It should be noted that, in the description of the present invention, the terms "set in order", "on", "inside", "outside", "upper end", "matching", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element indicated must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the utility model provides a pressure-bearing artesian well drainage test device, include: the water supply system comprises a water supply pipe, a water discharge control valve 2, a turbine flowmeter 3, a pressure gauge 1, a data collector 4 and a processing terminal 5, wherein the processing terminal 5 is a computer, the water supply pipe penetrates through a weakly permeable layer 6 and enters a confined aquifer 7, the pressure gauge 1, the water discharge control valve 2 and the turbine flowmeter 3 are sequentially arranged on the water supply pipe, and the data collector 4 is respectively connected with the pressure gauge 1, the turbine flowmeter 3 and the processing terminal 5.
It should be noted that the data acquisition unit 4 can automatically acquire and record the water discharge flow in real time, can control the water discharge flow under different pressure-bearing water levels in the drill hole, is convenient for quickly and accurately test the permeability coefficients of different rock masses, and provides water discharge flow data for solving the hydrogeological parameters of the rock strata of the drill hole by using computer data analysis software.
It should be noted that the data collector 4 can automatically collect and record the data of the pressure gauge 1 in real time, and can store the water pressure data in the water discharging process in real time.
It should be noted that the pressure of the pressure-bearing water can be obtained by closing the water discharge control valve 2, and the pressure-bearing water can be converted into the height of the pressure-bearing water column, so as to obtain the pressure-bearing water level. The time interval is set in the water discharging process, the water discharging control valve 2 is closed at regular time, the pressure of the pressure-bearing water at different moments in the water discharging process is obtained, a water level depth-falling curve of the pressure-bearing water in the water discharging process of the drill hole can be obtained after data processing, and water level depth-falling data are provided for solving the hydrogeological parameters of the rock stratum of the drill hole by using computer data analysis software. After the water discharge control valve 2 is closed, a drilling hole pressure-bearing water level simulation graph obtained by converting numerical values shown by a pressure gauge 1 is shown in fig. 2.
The method specifically comprises the following steps: according to the data collected by the data collector 4, the change data of the pressure-bearing water column water pressure is converted into pressure-bearing water level depth reduction data(s) in the computer, and an lgs-lgt actual measurement curve is made, wherein t is time, and
and (4) fitting the standard curve, and calculating the water diversion coefficient (T) and the permeability coefficient (K) of the aquifer according to the formula as shown in figures 3 and 4 (a certain water release test example).
According to a standard curve fitting method in underground hydrodynamics, a fixed flow pumping test for a certain drilling hole exists:
and is provided with
Is constant, so the measured lgs-lgt curve is consistent with theoretical
The form of the curve is the same, except that the ordinate is shifted
The distance of (c). The lgs-lgt measured curve is compared with
And fitting the standard curve to obtain a translation value s of the ordinate.
The water conductivity (T) is calculated according to equation (1):
in the formula, Q is the discharge flow rate, m 3 /h；
s-water head depreciation, m;
w (u) -well function of Theis well flow.
The permeability coefficient (K) is calculated according to equation (2):
where, T is the water conductivity coefficient, m 2 /d；
M is the thickness of the confined aquifer 7, M.
In order to prevent the hole wall of the drilled hole from protecting, preventing and controlling collapse and deformation, a sleeve is installed in the well mouth, the length of the sleeve is determined according to the integrity of the hole wall, the sleeve is sleeved on the water conveying pipe in the weakly permeable layer 6, and the inner diameter of the sleeve is matched with the outer diameter of the water conveying pipe.
And in order to prevent the underground water from overflowing from the well mouth, the upper end of the sleeve is grouted and consolidated with the water conveying pipe.
The field water discharge test device is composed of different modules which are convenient to disassemble and assemble, and is convenient to carry and transport in the field. Compared with the traditional fixed-depth-lowering water drainage test, the set of device adopts the variable-flow water drainage test device and the pressure-bearing water level change monitoring to record the real-time water drainage flow and the pressure-bearing water level change, the water drainage test is treated as a fixed-flow or variable-flow water pumping test, hydrogeological parameters are obtained by using computer data analysis software (the processing terminal 5), and the rock mass permeability coefficient can be obtained through faster and more accurate test.
In addition, aiming at the large change range of the height of the confined water columns of different drill holes, a turbine flow meter 3 and a water discharge control valve 2 are designed, the flow of a water discharge test under different confined water levels is controllably adjusted, so that the water discharge flow can be fixed within a proper size range, and the permeability of a rock mass is calculated and measured by utilizing different confined water level (water pressure) depth reduction data, so that the method can be suitable for solving the hydrogeological parameters of different confined aquifers 7, different lithologies and different permeability coefficients; the computer data analysis software is matched for use, so that the aim of more accurate and rapid test is fulfilled.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, particular embodiments, but rather to those skilled in the art, having the benefit of the teachings of the present invention, which is capable of numerous modifications and alternative forms, and will be readily apparent to those skilled in the art, and it is not intended to limit the invention to the details shown and described without departing from the general concepts defined by the appended claims and their equivalents.
Claims (3)
1. The utility model provides a pressure-bearing artesian well test device that drains which characterized in that includes: the water supply system comprises a water supply pipe, a water discharge control valve, a turbine flowmeter, a pressure gauge, a data collector and a processing terminal, wherein the water supply pipe penetrates through a weak permeable layer to enter a confined aquifer, the pressure gauge, the water discharge control valve and the turbine flowmeter are sequentially arranged on the water supply pipe, and the data collector is respectively connected with the pressure gauge and the turbine flowmeter.
2. The pressure-bearing artesian well water discharge test device of claim 1, further comprising: the sleeve is sleeved on the water pipe in the weak permeable layer, and the inner diameter of the sleeve is matched with the outer diameter of the water pipe.
3. The pressure-bearing artesian well water discharge test device of claim 2, wherein the upper end of the casing is consolidated with the water pipe by grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220373123.XU CN217055130U (en) | 2022-02-23 | 2022-02-23 | Pressure-bearing artesian well drainage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220373123.XU CN217055130U (en) | 2022-02-23 | 2022-02-23 | Pressure-bearing artesian well drainage test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217055130U true CN217055130U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220373123.XU Expired - Fee Related CN217055130U (en) | 2022-02-23 | 2022-02-23 | Pressure-bearing artesian well drainage test device |
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| Country | Link |
|---|---|
| CN (1) | CN217055130U (en) |
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2022
- 2022-02-23 CN CN202220373123.XU patent/CN217055130U/en not_active Expired - Fee Related
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Granted publication date: 20220726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |