CN114114428A - Experimental device for groundwater leakage electric field forms mechanism research - Google Patents
Experimental device for groundwater leakage electric field forms mechanism research Download PDFInfo
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- CN114114428A CN114114428A CN202111390419.9A CN202111390419A CN114114428A CN 114114428 A CN114114428 A CN 114114428A CN 202111390419 A CN202111390419 A CN 202111390419A CN 114114428 A CN114114428 A CN 114114428A
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- 230000005684 electric field Effects 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 title claims abstract description 33
- 238000011160 research Methods 0.000 title claims abstract description 25
- 239000003673 groundwater Substances 0.000 title claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000001052 transient effect Effects 0.000 claims abstract description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/082—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with fields produced by spontaneous potentials, e.g. electrochemical or produced by telluric currents
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Abstract
An experimental device for researching formation mechanism of underground water leakage electric field comprises the following steps: s1, starting a power supply of the direct current transmitter, adjusting transmission voltage and current, and sending linear voltage; s2, injecting a saline solution into the side of the electrode where the receiving electrode is located, and controlling a potential signal receiver to record a potential signal and continuously observe for 30 min; and S3, the analysis terminal acquires, stores and processes the received potential data, and verifies the formation mechanism of the leakage electric field through the transient distribution analysis of the potential. The research device has the advantages of few structural components, light overall weight, small volume and convenient carrying and movement, and is suitable for the research on the formation mechanism of a leakage electric field of a series of underground water leakage such as foundation pit leakage, dam leakage, pool leakage and the like.
Description
Technical Field
The invention relates to the field of geophysical exploration, in particular to a method and a device for researching an underground water leakage electric field forming mechanism based on electrochemistry.
Background
In recent years, engineering construction of underground railways, large traffic hubs, high-rise buildings and the like in coastal areas of China is accompanied by the appearance of a large number of underground enclosure structures (waterproof curtains, foundation pit underground continuous walls and the like), but due to the limitation of conditions such as construction process, surrounding environment, engineering geology, hydrogeology and the like, the underground enclosure structures are difficult to completely coincide, the problem of underground water leakage is difficult to avoid, and the urban infrastructure is caused to have inestimable loss and harm. Therefore, accurate detection and potential hazard evaluation of leakage of the underground enclosure structure are important preconditions and guarantees for guaranteeing the safety of foundation pit engineering and smooth progress of construction.
At present, geophysical methods for detecting groundwater leaks mainly include: natural potential method, temperature tracing detection, ECR method, resistivity method, ultrasonic detection method, flow field method, electromagnetic method and the like, and the related technology is not popularized and applied in the field due to complex field geophysical exploration background and unsatisfactory detection effect. The technical problem of leakage detection of the underground enclosure structure is described professionally, the hidden danger scale is small, the depth-diameter ratio is large, and even if the hidden danger part of the underground enclosure structure is an ideal low-resistance body, the ground electric method detection mode is extremely difficult to distinguish; in terms of the comprehensive environment developed by the leakage detection work of the underground enclosure structure, the underground enclosure structure is mostly positioned in an urban area, pile foundations are densely distributed, and the uniformity of the resistivity distribution of a covering layer is influenced by earth surface construction or residual media of a building, so that the distribution interference of an excitation electric field is large; secondly, the influence of stray current and electromagnetic field in the field industry is large; in addition, because the field and ground operating space is limited, the observation device is difficult to be geometrically unfolded, and therefore, rapid and accurate leakage positioning becomes a hot spot of current technical research.
Disclosure of Invention
According to the problems of the background art, the invention aims to provide a method and a device for researching a formation mechanism of an underground water leakage electric field based on electrochemistry, which are used for scientifically researching the formation mechanism of the underground water leakage electric field so as to solve the problems in the prior art.
The utility model provides an experimental apparatus for groundwater leakage electric field forms mechanism research which characterized in that includes:
the glass cylinder is internally provided with conductive liquid and is used for simulating an underground construction environment;
the concrete enclosure structure is arranged in the glass cylinder to partition the internal space of the glass cylinder and is used for simulating the concrete enclosure structure in an underground construction environment, and a permeation channel for connecting the two partition spaces of the glass cylinder is arranged in the concrete enclosure structure;
the power supply electrodes are respectively arranged at two ends of the glass cylinder, and the space separated by the glass cylinder is defined as a positive electrode side and a negative electrode side;
the positive and negative poles of the direct current transmitter are respectively electrically connected with the power supply electrode as binding posts and are used for forming an electric field in the glass cylinder;
the receiving electrodes are arranged on the glass cylinder and positioned on the positive electrode side of the side edge of the concrete enclosure structure, and the measuring ends of the receiving electrodes are immersed in the conductive liquid and used for obtaining the potential value of the conductive liquid;
the reference electrode is arranged on the positive electrode side where the receiving electrode is located and is attached to the power supply electrode to be used as reference voltage;
the potential signal receiver is in communication connection with the receiving electrode;
and the analysis terminal is in communication connection with the potential signal receiver, acquires and processes potential value data, and analyzes and verifies the formation mechanism of the leakage electric field through the transient distribution of the potential.
Further, the direct current transmitter, the power supply electrode and the power supply electrode form a direct current transmitting end; the potential signal receiver, the receiving electrode and the analysis terminal form a potential signal receiving end.
Preferably, the direct current transmitter is a programmable direct current transmitter, and variable direct current voltage is applied to the conductive liquid in the glass cylinder by means of a preset program.
Preferably, the power supply electrode and the power supply electrode are carbon plates, and the receiving electrode is a carbon rod or a non-polarized electrode.
Preferably, the potential signal receiver is provided with a 24-bit analog-to-digital converter and a plurality of connecting channels.
Preferably, the conductive liquid adopts precipitation or underground water; the electrolyte contained in the electrolyte has certain conductivity.
Preferably, the positive electrode side of the receiving electrode is injected with a saline solution.
The invention also provides a research method based on the underground water leakage electric field formation mechanism research device, which comprises the following steps:
s1, starting a power supply of the direct current transmitter, adjusting transmission voltage and current, and sending linear voltage;
s2, injecting a saline solution into the side of the electrode where the receiving electrode is located, and controlling a potential signal receiver to record a potential signal and continuously observe for 30 min;
and S3, the analysis terminal acquires, stores and processes the received potential data, and verifies the formation mechanism of the leakage electric field through the transient distribution analysis of the potential.
Has the advantages that: compared with the prior art, the research device has the advantages of few structural components, light overall weight, small volume, convenience in carrying and moving, and suitability for the research on the formation mechanism of a leakage electric field of a series of underground water leakage such as foundation pit leakage, dam leakage, pool leakage and the like.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for studying formation mechanism of electric field of groundwater leakage according to the present invention;
FIG. 2 is a flow chart of an implementation of a research method of a research device based on a formation mechanism of a groundwater leakage electric field according to the present invention;
FIG. 3 is a diagram of the results of numerical simulation and physical simulation of an exemplary embodiment of the present invention.
In the figure: the device comprises a power supply electrode 1, a concrete enclosure structure 2, a permeation channel 3, a direct current transmitter 4, a receiving electrode 5, a reference electrode 6, a power supply electrode 7, a potential signal receiver 8 and an analysis terminal 9.
Detailed Description
A specific embodiment of the present invention will be described in detail with reference to fig. 1-3.
Referring to the attached figure 1, the electrochemical-based research device for the formation mechanism of the groundwater leakage electric field is used for scientifically researching the formation mechanism of the groundwater leakage electric field, and comprises:
the glass cylinder is internally provided with conductive liquid and is used for simulating an underground construction environment;
the concrete enclosure structure 2 is arranged in the glass cylinder to isolate the internal space of the glass cylinder and is used for simulating the concrete enclosure structure in an underground construction environment, and a permeation channel 3 for connecting the two isolated spaces of the glass cylinder is arranged in the concrete enclosure structure;
power supply electrodes (1, 7) respectively arranged at both ends of the glass cylinder, and defining the space divided by the glass cylinder as a positive electrode side and a negative electrode side;
a direct current transmitter 4, the positive and negative poles of which are used as binding posts and are respectively electrically connected with the power supply electrode and used for forming an electric field in the glass cylinder;
the receiving electrodes 5 are arranged on the glass cylinder and positioned on the positive electrode side of the side edge of the concrete enclosure structure, and the measuring ends of the receiving electrodes are immersed in the conductive liquid and used for obtaining the potential value of the conductive liquid;
a reference electrode 6 which is provided on the positive electrode side where the receiving electrode 5 is located and is bonded to the feeding electrode as a reference voltage;
a potential signal receiver 8 connected in communication with the receiving electrode 5;
and the analysis terminal 9 is in communication connection with the potential signal receiver, acquires and processes potential value data, and analyzes and verifies the formation mechanism of the leakage electric field through the transient distribution of the potential.
The direct current transmitter 4, the power supply electrode 1 and the power supply electrode 7 form a direct current transmitting end, and the potential signal receiver 8, the receiving electrode 5 and the analysis terminal 9 form a potential signal receiving end. In this embodiment, the analysis terminal is a computer.
In this embodiment, the dc transmitter 4 is a programmable dc transmitter, and applies a variable dc voltage to the conductive liquid in the glass cylinder by a preset program.
In this embodiment, the power supply electrode 1 and the power supply electrode 7 are carbon plates, the receiving electrode 5 is a carbon rod or a non-polarized electrode, and the carbon plates have stable chemical properties and good conductivity.
In this embodiment, the potential signal receiver 8 has a 24-bit analog-to-digital converter with multiple connection channels.
In this embodiment, the conductive liquid in the glass jar is rainfall or underground water with a consistent actual environment, a trace amount of electrolyte is contained in the conductive liquid, the conductive liquid has certain conductivity, and a salt solution for enhancing the conductivity of the conductive liquid is injected to the electrode side where the receiving electrode 5 is located.
Referring to fig. 2, the present invention further provides a research method of a device for researching a formation mechanism of an electric field based on groundwater leakage, including the following steps:
s1, starting a power supply of the direct current transmitter, adjusting transmission voltage and current, and sending linear voltage;
s2, injecting a saline solution into the side of the electrode where the receiving electrode is located, and controlling a potential signal receiver to record a potential signal and continuously observe for 30 min;
and S3, the analysis terminal acquires, stores and processes the received potential data, and verifies the formation mechanism of the leakage electric field through the transient distribution analysis of the potential.
Referring to fig. 3, the results of numerical simulation and physical simulation of the electrochemical-based mechanism for researching formation of the groundwater leakage electric field are shown through an embodiment, in the embodiment, the size of the glass reinforced plastic model is 80cm × 20cm, the resistivity of concrete is 500 Ω · m, the resistivity of water is 30 Ω · m, 4 receiving electrodes are arranged through 4 detection points, and the results of the physical simulation and the numerical simulation are compared through four output channels of a potential signal receiver, so that the basic fitting of a curve can be seen, and the electrochemical-based mechanism for forming the groundwater leakage electric field is verified mutually.
The research device has the advantages of few structural components, light overall weight, small volume and convenient carrying and movement, and is suitable for the research on the formation mechanism of a leakage electric field of a series of underground water leakage such as foundation pit leakage, dam leakage, pool leakage and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Experimental device for groundwater seepage electric field formation mechanism research, its characterized in that includes:
the glass cylinder is internally provided with conductive liquid and is used for simulating an underground construction environment;
the concrete enclosure structure (2) is arranged in the glass cylinder to isolate the internal space of the glass cylinder and is used for simulating the concrete enclosure structure in an underground construction environment, and a permeation channel for connecting the two isolated spaces of the glass cylinder is arranged in the concrete enclosure structure;
power supply electrodes (1, 7) respectively arranged at two ends of the glass cylinder and defining the space separated by the glass cylinder as a positive electrode side and a negative electrode side;
the positive and negative poles of the direct current transmitter (4) are respectively electrically connected with the power supply electrode as binding posts and are used for forming an electric field in the glass cylinder;
the receiving electrodes (5) are arranged on the glass cylinder and positioned on one side of the concrete enclosure structure, and the measuring ends of the receiving electrodes are immersed in the conductive liquid and used for obtaining the potential value of the conductive liquid;
the reference electrode (6) is arranged on the positive electrode side where the receiving electrode (5) is located, is attached to the power supply electrode and serves as a reference voltage;
a potential signal receiver (8) which is connected with the receiving electrode (5) in a communication way;
and the analysis terminal (9) is in communication connection with the potential signal receiver, acquires and processes potential value data, and analyzes and verifies the formation mechanism of the leakage electric field through the transient distribution of the potential.
2. A groundwater seepage electric field formation mechanism research apparatus according to claim 1, wherein:
the direct current transmitter (4), the power supply electrode (1) and the power supply electrode (7) form a direct current transmitting end;
the potential signal receiver (8), the receiving electrode (5) and the analysis terminal (9) form a potential signal receiving end.
3. A groundwater seepage electric field formation mechanism research apparatus according to claim 1, wherein:
the direct current transmitter (4) is a programmable direct current transmitter, and variable direct current voltage is applied to the conductive liquid in the glass cylinder by means of a preset program.
4. A groundwater seepage electric field formation mechanism research apparatus according to claim 1, wherein:
the power supply electrode (1) and the power supply electrode (7) are carbon plates, and the receiving electrode (5) is a carbon rod or a non-polarized electrode.
5. A groundwater seepage electric field formation mechanism research apparatus according to claim 1, wherein:
the potential signal receiver (8) is provided with a 24-bit analog-to-digital converter and a multi-connection channel.
6. A groundwater seepage electric field formation mechanism research apparatus according to claim 1, wherein:
the conductive liquid adopts precipitation or underground water.
7. A groundwater seepage electric field formation mechanism research apparatus according to claim 6, wherein:
saline solution is injected into the positive electrode side where the receiving electrode (5) is located.
8. A research method based on a groundwater leakage electric field forming mechanism research device comprises the following steps:
s1, starting a power supply of the direct current transmitter, adjusting transmission voltage and current, and sending linear voltage;
s2, injecting a saline solution into the side of the electrode where the receiving electrode is located, and controlling a potential signal receiver to record a potential signal and continuously observe for 30 min;
and S3, the analysis terminal acquires, stores and processes the received potential data, and verifies the formation mechanism of the leakage electric field through the transient distribution analysis of the potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111390419.9A CN114114428A (en) | 2021-11-23 | 2021-11-23 | Experimental device for groundwater leakage electric field forms mechanism research |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111390419.9A CN114114428A (en) | 2021-11-23 | 2021-11-23 | Experimental device for groundwater leakage electric field forms mechanism research |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001050850A (en) * | 1999-08-09 | 2001-02-23 | Nishimatsu Constr Co Ltd | Apparatus and method for detecting leak of water by potential method |
| CN1621823A (en) * | 2003-11-26 | 2005-06-01 | 中国环境科学研究院 | Electricity detecting method and equipment for leakage of refuse landfill leaking-proof layer |
| CN207714393U (en) * | 2017-12-13 | 2018-08-10 | 山东大学 | A kind of vertical plastic spreading seepage proof curtain leak detection apparatus |
| CN111912587A (en) * | 2020-07-10 | 2020-11-10 | 中国环境科学研究院 | Method and system for evaluating leakage condition and positioning damage of solid waste land disposal facility |
| CN113155379A (en) * | 2021-04-12 | 2021-07-23 | 同济大学 | Foundation pit support structure electric leakage detection simulation test device and test method thereof |
-
2021
- 2021-11-23 CN CN202111390419.9A patent/CN114114428A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001050850A (en) * | 1999-08-09 | 2001-02-23 | Nishimatsu Constr Co Ltd | Apparatus and method for detecting leak of water by potential method |
| CN1621823A (en) * | 2003-11-26 | 2005-06-01 | 中国环境科学研究院 | Electricity detecting method and equipment for leakage of refuse landfill leaking-proof layer |
| CN207714393U (en) * | 2017-12-13 | 2018-08-10 | 山东大学 | A kind of vertical plastic spreading seepage proof curtain leak detection apparatus |
| CN111912587A (en) * | 2020-07-10 | 2020-11-10 | 中国环境科学研究院 | Method and system for evaluating leakage condition and positioning damage of solid waste land disposal facility |
| CN113155379A (en) * | 2021-04-12 | 2021-07-23 | 同济大学 | Foundation pit support structure electric leakage detection simulation test device and test method thereof |
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Application publication date: 20220301 |