CN102889967A - System and method for rapidly detecting seepage of geomembrane in refuse landfill - Google Patents
System and method for rapidly detecting seepage of geomembrane in refuse landfill Download PDFInfo
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Abstract
The invention provides a system and method for rapidly detecting seepage of a geomembrane in a refuse landfill. The system comprises a mobile testing car, wherein the mobile testing car is matched with a testing probe, a signal processing circuit, a data acquiring system, a GPS (Global Position System) positioning device and a computer data analysis and model establishing system; and the testing probe is connected with the anode of a high-voltage (1000V) signal source through a lead, and the cathode of a high-voltage (1000V) direct signal source is connected with a high-voltage electrode. When a device for rapidly detecting seepage of the geomembrane in the refuse landfill is used for detection, large-scale soil aeration on the refuse landfill is not needed, and paving of a plurality of detecting electrodes is also not needed; and when seepage detection is carried out by using a high-voltage direct-current method, a seepage point can be rapidly searched through orienting and positioning by using a voltage field multi-dimensional vector analysis method which is different from the traditional plane voltage field analysis method. By using the GPS navigation of a vehicle-mounted detecting system, the detection process is accelerated, the detecting efficiency is increased, and the labor intensity is reduced.
Description
Technical field
The present invention relates to the leak detection technology, be specifically related to a kind of refuse landfill geomembrane seepage method for quick.
Background technology
Garbage loading embeading is that China uses the most widely Disposal of Municipal Refuse and mode at present.Along with the growth of economy, the expansion of city size and the raising of living standards of the people, Domestic Refuse continues to increase, and the garbage loading embeading number also increases thereupon.The matter of utmost importance that city refuse landfill is processed is to prevent that underground water and surface water near the landfill yard are subject to the pollution of percolate, therefore, must consider the design of seepage control system on the reasonable plant-site selection basis.In the impermeable system of refuse landfill, what domestic and international application was more at present is that high density polyethylene (HDPE) is made artificial liner, is called for short geomembrane.The HDPE geomembrane is used for landfill site seepage prevention and has the strong and good advantage of anti-permeability performance of resistance to chemical attack.But the HDPE geomembrane has the relatively poor shortcoming of anti-puncture ability, be easy to occur damaged because of construction method, mechanically actuated and environmental impact etc., form the defectives such as crack, hole and scratch, reduced the anti-seepage effect of liner, percolate will flow in the surrounding soil by rupture location, contaminated soil and underground water cause serious consequence.
In China, the leakage problems that occurs in landfill yard and the leachate collection process more and more causes the attention of relevant department.Therefore, how detecting quickly and accurately that geomembrane breaks is to prevent the vital work of leachate contamination underground water.At present, the leak detection method that is used for artificial impervious barrier is mainly plane voltage field analytical approach, fail to detect the change in voltage of depth direction, only analyze from two-dimensional directional, its detection method not enough accurately rationally, and the voltage signal that collects is directly analyzed, and does not carry out difference processing, is subject to external interference.In addition, most of detection methods need to be carried out pre-buried a large amount of detecting electrode to refuse landfill, and the soot that does not bury detecting electrode in the past is not suitable for.In sum, can find out that the city refuse landfill seepage analysis does not also have reliable way, the analytical approach of employing can not reflect the actual seepage situation of percolate well, can not find out accurately position.
Summary of the invention
For effectively control and improvement percolate are to the pollution of environment, the technical problem to be solved in the present invention is how the seepage of refuse landfill geomembrane to be carried out fast detecting, and a kind of seepage method for quick of refuse landfill geomembrane is provided.
Solve the problems of the technologies described above, the technological means that the present invention adopts is:
A kind of refuse landfill geomembrane seepage rapid detection system, it is characterized in that, comprise: the mobile test dolly, supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model are set up system on the described mobile test dolly;
Wherein, described test rapier comprises detecting electrode, high-voltage signal emitting electrode and receiving electrode, wherein, described high-voltage signal emitting electrode (positive electrode) be connected electrode (negative electrode) and be connected 1000V with high pressure by wire) signal source connects; The positive and negative electrode of detecting electrode is connected on the signal acquiring system interface by wire, and wherein, nothing connects between a plurality of detecting electrodes;
Signal processing circuit and data acquisition system adopted NI 9213 modules are used for the differential signal that collects is carried out filtering noise reduction and signal amplification processing; And finish analog to digital conversion by one 24 analog to digital converters (ADC).
The GPS locating device, the vehicle-mounted detecting system GPS navigation positions record, accelerates testing process, improves detection efficiency and reduces labour intensity.
Computer data analysis and model are set up system, by setting up the multidimensional potential measurement model of computer intelligence vector analysis system, the differential voltage signal that collects are carried out vector analysis, comprise trivector angle and voltage signal Analyzing on Size.
Further, described test rapier is multi-faceted test rapier, and detecting electrode is placed on the X of three-dimensional system of coordinate, and Y on the Z axis, can survey diverse location on the XY surface level simultaneously, and the detection signal of depth direction (Z axis), and probe evenly distributes;
Further, described test rapier is silver-plated probe, and positive electrode and negative electricity be stainless steel or copper very, and profile is column.
A kind of refuse landfill geomembrane seepage method for quick adopts above-mentioned refuse landfill geomembrane seepage device for fast detecting to detect, and concrete steps comprise:
High-field electrode is embedded in garbage loading embeading outside the venue, test rapier on the mobile test dolly is probeed into the surface in soot, the mobile test dolly slowly travels, multi-faceted test rapier collection signal is transferred to signal processing circuit, data acquisition system (DAS), GPS locating device, and sets up system's processing through computer data analysis and model;
By multipoint voltage difference cloth around the test electrode (comprise with the change in depth voltage difference and distributing), then set up model by special software, carry out the voltage difference vector analysis; The mobile test dolly is according to the vector analysis result, and to the voltage difference variation tendency direction segment distance that moves, measuring voltage difference cloth is revised test model again again; If the refuse landfill geomembrane has damaged infiltration, the space electric field distribution plan can be judged rapidly the geomembrane break by analysis.
Compared to existing technology, the present invention has following advantage
1, do not need refuse landfill is digged on a large scale, do not need to lay in a large number detecting electrode, adopt voltage field multidimensional vector analytical approach during with the leak detection of high voltage direct current electrical method, be different from the analysis of frontal plane voltage field, can be to breakthrough slewing fixed-position searching.
2, utilize the vehicle-mounted detecting system GPS navigation to accelerate testing process, improve detection efficiency and reduce labour intensity.
3, the difference rule of two electrodes under the refuse landfill soil property high-voltage condition is sought in the present invention's research, the research geomembrane breaks and concerns with the penetrating fluid current electric fields, solved impermeable geomembrane fast detecting problem, permeate the industrialization of quick checkout equipment for exploitation refuse landfill geomembrane and lay solid technical foundation, accumulation refuse landfill geomembrane permeates technology and the experience of quick checkout equipment exploitation.
Simultaneously, develop the quick leakage detection device model machine of city refuse landfill geomembrane, finish the detection of refuse landfill geomembrane rupture location and judge that submission detects data and report.
Description of drawings
Fig. 1 is the synoptic diagram of the leak detection method of refuse landfill geomembrane of the present invention.
Fig. 2 is detecting electrode space distribution synoptic diagram of the present invention.
Among the figure, garbage mixture 4-positive electrode 5-constant current source 6-negative electrode 7,8,9-measuring probe 10-geomembrane damage breakthrough in the soil 2-geomembrane 3-refuse landfill outside the venue of 1-garbage loading embeading.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.
Referring to Fig. 1, a kind of refuse landfill geomembrane seepage rapid detection system, comprise mobile test dolly (omitting among the figure), supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model are set up system on the described mobile test dolly; Described test rapier is surveyed by wire and high pressure (1000V) signal source anodal, and the negative pole of high pressure (1000V) dc signal source connects high-field electrode.
The seepage method for quick of refuse landfill geomembrane of the present invention by measuring somewhere voltage variety in the landfill yard, is judged to obtain measurement point and leak source distance and direction.Concrete steps are as follows:
As shown in Figure 1, bury a high pressure negative electrode 6 underground in the soil in the geomembrane outside, the other end of electrode is that positive electrode 4 is installed on the mobile test dolly, and positive and negative two electrodes are connected to the two ends of signal source 5.During detection, the positive electrode 4 on the travelling car now is embedded in the refuse landfill above the geomembrane in the garbage mixture 3.
Each probe space distribution synoptic diagram of detecting electrode as shown in Figure 2,5 exploring electrodes are vertical distribution, and wherein exploring electrode 1 ' (8 among Fig. 1) is for being connected to the probe on positive electrode 4 external insulation layers, for the voltage of the direction that fathoms, totally 2, distance each other is 0.5m; Exploring electrode 2 ' (9 among Fig. 1), 3 ' (7 among Fig. 1), 4 ', 5 ' is for being evenly distributed on the probe around the positive electrode, and totally 8, spacing is 0.5m.Can find out that 10 probes have consisted of the multi-faceted test rapier in space, disposablely can gather multipoint voltage difference cloth (comprise with change in depth voltage difference distribute).
When giving positive and negative two electrode power supplies, when testing circuit did not form the loop, the insulativity owing to geomembrane illustrated that geomembrane does not have breakthrough; When the refuse landfill geomembrane has damaged break (point 10 among Fig. 1), electric current passes leak and forms the loop, by measurement mechanism obtain exploring electrode 1 '～5 ' voltage variety △ U1～△ U5.If exploring electrode 1 ' voltage variety △ U1 less than 2 '～5 ' voltage variety, detecting location and breakthrough 10 are distant so, exploring electrode 1 ' voltage variety △ U1 greater than 2 '～5 ' voltage variety, so detecting location and breakthrough 10 close together.And by synthetic 1 ', 2 ', 4 ' draw sensing point and breakthrough direction vector, direction indication and angle by resultant vector are judged the breakthrough position, same method is synthesized other several exploring electrodes, through the synthetic determination of a plurality of direction vectors, determine voltage field change direction and breakthrough scope.At this moment, the mobile test dolly is according to the change in voltage trend direction segment distance that moves, and measuring voltage distributes again, judge that direction of motion and distance be whether correct and redefine the leak source position, revise test model, so duplicate measurements can be judged the geomembrane break several times rapidly, exactly.Wherein, detection signal is gathered by difference analogue load module NI 9213, be connected in each passage of NI 9213 through difference filter and multiplexer, to the signal that collects carry out filtering noise reduction and signal amplify process after, carry out analog to digital conversion by one 24 analog to digital converters (ADC).Then by passing to supervisory computer, carry out real time data processing analysis and record with self-programmed software, carry out leak source and judge, and position record by the GPS positioning system.
It is now will test rapier to insert the soot that dolly drives to a certain position, and insert once position of every movement again.
The present invention mainly comprises system hardware and software design and its related control algolithm and control structure research, makes it become in present detection scheme one of method of Simple fast.
⑴ analyze the electrology characteristic of soil in the refuse landfill, according to the voltage differential signal vector analysis geomembrane state of rupture distribution situation that gathers.
⑵ research is to voltage field multidimensional vector analytical approach, and the research voltage field is measured Distribution Algorithm.
⑶ adopt collecting and distributing type control, and data are carried out analog to digital conversion nearby, then unifies to process by the concentrated supervisory computer of passing to of CAN bus.
⑷ the software of system is processed and realized: on the basis of foreign geophysical prospecting technology, propose the method that a kind of garbage landfill yard detects seepage, the method has improved the accuracy of leak location preferably.
⑸ further improve high voltage direct current electrical method seepage fast detecting (the voltage field multidimensional vector is analyzed).
⑹ propose the garbage landfill yard geomembrane and break and leak method for quick, image processing and method for extracting signal, and break and leak position method for rapidly judging.
In a word, the present invention is by setting up the model that reaches the Soil Surrounding Electrical Characteristics in the refuse landfill; Set up the multidimensional voltage differential signal measurement model of computer intelligence vector analysis system; Realization forms geomembrane state of rupture distribution field to the data acquisition of geomembrane Safety check-up, realizes finding out fast accurately position, the actual seepage situation of reflection percolate.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. refuse landfill geomembrane seepage rapid detection system, it is characterized in that, comprise: the mobile test dolly, supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model are set up system on the described mobile test dolly;
Wherein, described test rapier comprises detecting electrode, high-voltage signal emitting electrode and receiving electrode, wherein, described high-voltage signal emitting electrode (positive electrode) be connected electrode (negative electrode) and be connected 1000V with high pressure by wire) signal source connects; The positive and negative electrode of detecting electrode is connected on the signal acquiring system interface by wire;
Signal processing circuit and data acquisition system adopted NI 9213 modules are used for the differential signal that collects is carried out filtering noise reduction and signal amplification processing; And finish analog to digital conversion by one 24 analog to digital converters (ADC);
The GPS locating device, the vehicle-mounted detecting system GPS navigation positions record;
Computer data analysis and model are set up system, by setting up the multidimensional potential measurement model of computer intelligence vector analysis system, the differential voltage signal that collects are carried out vector analysis, comprise trivector angle and voltage signal Analyzing on Size.
2. described refuse landfill geomembrane seepage rapid detection system according to claim 1, it is characterized in that, described test rapier is vertical distribution, X at three-dimensional system of coordinate, Y on the Z axis, surveys diverse location on the XY surface level simultaneously, and the detection signal of depth direction (Z axis), probe evenly distributes.
3. described refuse landfill geomembrane seepage rapid detection system according to claim 1 is characterized in that described test rapier is silver-plated probe, and positive electrode and negative electricity be stainless steel or copper very, and profile is column.
4. refuse landfill geomembrane seepage method for quick is characterized in that, adopts the described detection system of claim 1 to detect, and concrete steps comprise:
High-field electrode is embedded in garbage loading embeading outside the venue, test rapier on the mobile test dolly is probeed into the surface in soot, the mobile test dolly slowly travels, multi-faceted test rapier is transferred to signal processing circuit, data acquisition system (DAS), GPS locating device with the detection signal that collects, and sets up system's processing through computer data analysis and model;
By multipoint voltage difference cloth around the test electrode, comprise with the change in depth voltage difference distributing; Then set up model by special software, carry out the voltage difference vector analysis; The mobile test dolly is according to the vector analysis result, and to the voltage difference variation tendency direction segment distance that moves, measuring voltage difference cloth is revised test model again again; If the refuse landfill geomembrane has damaged infiltration, the space electric field distribution plan can be judged rapidly the geomembrane break by analysis.
5. described refuse landfill geomembrane seepage method for quick according to claim 4, it is characterized in that, described detection signal is gathered by difference analogue load module NI 9213, be connected in each passage of NI 9213 through difference filter and multiplexer, to the signal that collects carry out filtering noise reduction and signal amplify process after, carry out analog to digital conversion by one 24 analog to digital converters (ADC); Then carry out real time data processing analysis and record by passing to supervisory computer, carry out leak source and judge, and position record by the GPS positioning system;
In the testing process, when giving positive and negative two electrode power supplies, when testing circuit did not form the loop, the insulativity owing to geomembrane illustrated that geomembrane does not have breakthrough; When the refuse landfill geomembrane has damaged break, electric current passes leak and forms the loop, by measuring system obtain exploring electrode 1 '～5 ' voltage variety △ U1～△ U5; If exploring electrode 1 ' voltage variety △ U1 less than 2 '～5 ' voltage variety, detecting location and breakthrough 10 are distant so, exploring electrode 1 ' voltage variety △ U1 greater than 2 '～5 ' voltage variety, so detecting location and breakthrough 10 close together;
And by synthetic 1 ', 2 ', 4 ' draw sensing point and breakthrough direction vector, direction indication and angle by resultant vector are judged the breakthrough position, same method is synthesized other several exploring electrodes, through the synthetic determination of a plurality of direction vectors, determine voltage field change direction and breakthrough scope;
The mobile test dolly is according to the change in voltage trend direction segment distance that moves, measuring voltage distributes again, judges that direction of motion and distance be whether correct and redefine leak source position, correction test model, so duplicate measurements can be judged the geomembrane break several times rapidly, exactly.
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| CN104568334A (en) * | 2014-12-30 | 2015-04-29 | 北京高能时代环境技术股份有限公司 | Rapid leakage detection method for geomembrane |
| CN104863189A (en) * | 2015-04-28 | 2015-08-26 | 中国科学院武汉岩土力学研究所 | Damage and leakage detection system for impermeable layer of refuse landfill |
| CN105675237A (en) * | 2016-01-13 | 2016-06-15 | 中国科学院武汉岩土力学研究所 | Landfill impervious layer hole detection system and method |
| CN107794882A (en) * | 2017-10-19 | 2018-03-13 | 河海大学 | A kind of geomembrane and its leakage detection method for being easy to large area leak detection |
| CN107816639A (en) * | 2017-11-17 | 2018-03-20 | 段清明 | Underground water seepage detection system and detection method based on electrochemistry |
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| CN109856192A (en) * | 2017-08-18 | 2019-06-07 | 上海甚致环保科技有限公司 | Monitoring sensor-based system for geomembrane |
| CN107794882A (en) * | 2017-10-19 | 2018-03-13 | 河海大学 | A kind of geomembrane and its leakage detection method for being easy to large area leak detection |
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| CN109839419B (en) * | 2018-03-23 | 2020-05-22 | 中国环境科学研究院 | Off-site detection system and method for impermeable layer |
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| CN109709614A (en) * | 2019-02-25 | 2019-05-03 | 安徽瑞迪工程科技有限公司 | The method of three pole precise measurement refuse landfill geomembranes infiltration hole |
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| CN111931262A (en) * | 2019-04-26 | 2020-11-13 | 天津大学青岛海洋技术研究院 | Physical model for detecting seepage of pit foundation enclosure |
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| CN111397808A (en) * | 2020-04-20 | 2020-07-10 | 河海大学 | Geomembrane leakage multi-electrode matrix detection device and detection method thereof |
| CN111638164A (en) * | 2020-05-25 | 2020-09-08 | 河海大学 | Device, system and method for detecting geomembrane leakage position by double-electrode method |
| 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 |
| US12000757B2 (en) | 2020-07-10 | 2024-06-04 | Chinese Research Academy Of Environmental Sciences | Method and system for leakage status evaluation and leaks location of solid waste land disposal facility |
| CN112964423B (en) * | 2021-02-02 | 2022-07-15 | 浙江大学 | Landfill vulnerability positioning device and method based on combinable optical fiber thermal response |
| CN112964423A (en) * | 2021-02-02 | 2021-06-15 | 浙江大学 | Landfill vulnerability positioning device and method based on combinable optical fiber thermal response |
| US11566960B1 (en) | 2022-02-21 | 2023-01-31 | Chengdu University Of Technology | Simulation platform and simulation method for leakage detection and treatment |
| CN114216621A (en) * | 2022-02-21 | 2022-03-22 | 成都理工大学 | Leakage detection and treatment simulation platform and simulation method |
| CN114878092A (en) * | 2022-06-08 | 2022-08-09 | 山东大学 | Leakage monitoring device and monitoring method |
| CN115290964A (en) * | 2022-07-20 | 2022-11-04 | 云南民族大学 | Water area voltage detection device and detection method |
| CN115628859A (en) * | 2022-12-07 | 2023-01-20 | 山东大学 | Leakage detection and leakage repair device for operation and closure refuse landfill and implementation method |
| CN115628859B (en) * | 2022-12-07 | 2023-03-28 | 山东大学 | Leakage detection and leakage repairing device for operation and sealing refuse landfill and implementation method |
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