CN102889967B - Refuse landfill geomembrane seepage rapid detection system and detection method - Google Patents
Refuse landfill geomembrane seepage rapid detection system and detection method Download PDFInfo
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- CN102889967B CN102889967B CN201210386342.2A CN201210386342A CN102889967B CN 102889967 B CN102889967 B CN 102889967B CN 201210386342 A CN201210386342 A CN 201210386342A CN 102889967 B CN102889967 B CN 102889967B
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Abstract
The invention provides a kind of refuse landfill geomembrane seepage rapid detection system and detection method, this detection system comprises: mobile test dolly, and on described mobile test dolly, system set up by supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model; Described test rapier is surveyed by wire and high pressure (1000V) signal source positive pole, and the negative pole in high pressure (1000V) direct signal source connects high-field electrode.Above-mentioned refuse landfill geomembrane seepage device for fast detecting is adopted to detect, do not need to dig on a large scale to refuse landfill, do not need to lay detecting electrode in a large number, with adopting voltage field multidimensional vector analytical approach during the leak detection of high voltage direct current electrical method, be different from the analysis of frontal plane voltage field, can to breakthrough slewing fixed-position searching.Utilize vehicle-mounted detecting system GPS navigation to accelerate testing process, improve detection efficiency and reduce labour intensity.
Description
Technical field
The present invention relates to 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 Disposal of Municipal Refuse and mode the most widely at present.Along with the raising of the growth of economy, the expansion of city size and living standards of the people, Domestic Refuse continues to increase, and garbage loading embeading number also increases thereupon.Be prevent underground water and surface water near landfill yard to be subject to the pollution of percolate to the matter of utmost importance of city refuse landfill process, therefore, reasonable plant-site selection basis must be considered the design of seepage control system.In the impermeable system of refuse landfill, what current domestic and international application was more is that high density polyethylene (HDPE) makes artificial liner, is called for short geomembrane.HDPE geomembrane is used for landfill site seepage prevention and has the advantage that resistance to chemical attack is strong and anti-permeability performance is good.But HDPE geomembrane has the poor shortcoming of anti-puncture ability, be easy to because construction method, mechanically actuated and environmental impact etc. occur damaged, form the defects such as crack, hole and scratch, reduce the anti-seepage effect of liner, percolate will flow in surrounding soil by rupture location, contaminated soil and underground water, cause serious consequence.
In China, the leakage problems occurred in landfill yard and leachate collection process more and more causes the attention of relevant department.Therefore, how quickly and accurately detection geomembrane breaks is prevent the vital work of leachate contamination underground water.At present, leakage detection method 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 collected directly is analyzed, do not carry out difference processing, be subject to external interference.In addition, most of detection method needs to carry out pre-buried a large amount of detecting electrode to refuse landfill, is not suitable for the soot not burying detecting electrode in the past.In sum, can find out that city refuse landfill seepage analysis does not also have reliable way, the analytical approach of employing can not reflect the actual leakage scenarios of percolate well, can not find out position accurately.
Summary of the invention
In order to effectively control and administer the pollution of percolate to environment, the technical problem to be solved in the present invention is, how to detect fast the seepage of refuse landfill geomembrane, and provides a kind of seepage method for quick of refuse landfill geomembrane.
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: mobile test dolly, on described mobile test dolly, system set up by supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model;
Wherein, described test rapier comprises detecting electrode, high-voltage signal emitting electrode and receiving electrode, wherein, described high-voltage signal emitting electrode (positive electrode) with accept electrode (negative electrode) and be connected with high pressure (1000V) signal source by wire; The positive and negative electrode of detecting electrode is connected on signal acquiring system interface by wire, wherein, without connecting between multiple detecting electrode;
Signal processing circuit and data acquisition system (DAS) adopt NI 9213 module, for carrying out filtering noise reduction and signal amplification process to the differential signal collected; And complete analog to digital conversion by one 24 analog to digital converters (ADC).
GPS locating device, vehicle-mounted detecting system GPS navigation positions record, accelerates testing process, improves detection efficiency and reduces labour intensity.
System set up by computer data analysis and model, by setting up the multidimensional potential measurement model of computer intelligence vector analysis system, carrying out vector analysis to the differential voltage signal collected, comprising 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, Y, on Z axis, can detect diverse location on XY surface level simultaneously, and the detection signal of depth direction (Z axis), and probe is uniformly distributed;
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, adopt above-mentioned refuse landfill geomembrane seepage device for fast detecting to detect, concrete steps comprise:
High-field electrode is embedded in garbage loading embeading outside the venue, test rapier on mobile test dolly is probeed into the surface in soot, slow traveling mobile test dolly, multi-faceted test rapier collection signal is transferred to signal processing circuit, data acquisition system (DAS), GPS locating device, and sets up system process through computer data analysis and model;
By multipoint voltage difference cloth around test electrode (comprising with the distribution of change in depth voltage difference), then by special software Modling model, carry out difference voltage vector analysis; Mobile test dolly is according to vector analysis result, and move to voltage difference variation tendency direction a segment distance, and measuring voltage difference cloth, revises test model again again; If refuse landfill geomembrane has damaged infiltration, space electric field distribution plan can judge rapidly geomembrane break by analysis.
Compared to existing technology, tool of the present invention has the following advantages
1, not needing to dig on a large scale to refuse landfill, do not need to lay detecting electrode in a large number, with adopting voltage field multidimensional vector analytical approach during the leak detection of high voltage direct current electrical method, being different from the analysis of frontal plane voltage field, can to breakthrough slewing fixed-position searching.
2, utilize 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 refuse landfill soil property high-voltage condition is sought in the present invention's research, research geomembrane breaks and penetrating fluid current electric fields relation, solve the quick test problems of impermeable geomembrane, solid technical foundation is laid in the industrialization of permeating quick checkout equipment for exploitation refuse landfill geomembrane, and accumulation refuse landfill geomembrane permeates technology and the experience of the exploitation of quick checkout equipment.
Meanwhile, develop the quick leakage detection device model machine of city refuse landfill geomembrane, complete refuse landfill geomembrane rupture location and detect and judge, submit to and detect data and report.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the leakage detection method of refuse landfill geomembrane of the present invention.
Fig. 2 is detecting electrode space distribution schematic diagram of the present invention.
In figure, garbage mixture 4-positive electrode 5-constant current source 6-negative electrode 7 in the soil 2-geomembrane 3-refuse landfill outside the venue of 1-garbage loading embeading, 8,9-measuring probe 10-geomembrane damage breakthrough.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.
See Fig. 1, a kind of refuse landfill geomembrane seepage rapid detection system, comprise mobile test dolly (omitting in figure), on described mobile test dolly, system set up by supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model; Described test rapier is surveyed by wire and high pressure (1000V) signal source positive pole, 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 landfill yard, judges 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 in the soil outside geomembrane underground, the other end of electrode is that positive electrode 4 is arranged on mobile test dolly, and positive and negative two Electrode connection are at the two ends of signal source 5.During detection, the positive electrode 4 on travelling car to be now embedded in the refuse landfill above geomembrane in garbage mixture 3.
Detecting electrode each probe space distribution schematic diagram as shown in Figure 2,5 exploring electrodes are vertical distribution, and wherein exploring electrode 1 ' (8 in Fig. 1) is for being connected to the probe on positive electrode 4 external insulation layer, for the voltage in the direction that fathoms, totally 2, distance is each other 0.5m; Exploring electrode 2 ' (9 in Fig. 1), 3 ' (7 in Fig. 1), 4 ', 5 ' are for being evenly distributed on the probe around positive electrode, and totally 8, spacing is 0.5m.Can find out, 10 probes constitute the multi-faceted test rapier in space, disposablely can gather multipoint voltage difference cloth (comprise with change in depth voltage difference distribution).
When giving positive and negative two electrode power supplies, when testing circuit does not form loop, due to the insulativity of geomembrane, illustrate that geomembrane does not have breakthrough; When refuse landfill geomembrane has damaged break (point 10 in Fig. 1), electric current forms loop through leak, is obtained voltage variety △ U1 ~ △ U5 of exploring electrode 1 ' ~ 5 ' by measurement mechanism.If the voltage variety that the voltage variety △ U1 of exploring electrode 1 ' is less than 2 ' ~ 5 ', so detecting location and breakthrough 10 distant, the voltage variety that the voltage variety △ U1 of exploring electrode 1 ' is greater than 2 ' ~ 5 ', so detecting location and breakthrough 10 close together.And by synthesis 1 ', 2 ', 4 ' draws sensing point and breakthrough direction vector, breakthrough position is judged by the direction indication of resultant vector and angle, same method synthesizes other several exploring electrodes, through the synthetic determination of multiple directions vector, determine voltage field change direction and breakthrough scope.Now, mobile test dolly to move a segment distance according to change in voltage trend direction, measuring voltage distribution again, judge that direction of motion and distance be whether correct and redefine leak source position, revise test model, duplicate measurements like this several times, can judge geomembrane break rapidly, exactly.Wherein, detection signal is gathered by difference analogue load module NI 9213, the each passage being connected in NI 9213, through difference filter and multiplexer, after carrying out filtering noise reduction and signal amplification process, carries out analog to digital conversion by one 24 analog to digital converters (ADC) to the signal collected.Then by passing to supervisory computer, carrying out real time data processing analysis and record with self-programmed software, carrying out leak source judgement, and position record by GPS positioning system.
It is that existing rapier of testing inserts soot that dolly drives to a certain position, and often a mobile position is inserted once again.
The present invention mainly comprises system hardware and software design and the control algolithm involved by it and control structure research, makes it become one of method the most simple and quick in current detection scheme.
(1) the electrology characteristic of soil in refuse landfill is analyzed, according to the voltage differential signal vector analysis geomembrane state of rupture distribution situation gathered.
(2) study voltage field multidimensional vector analytical approach, research voltage field measures Distribution Algorithm.
(3) adopt collecting and distributing type to control, data are carried out analog to digital conversion nearby, then undertaken unifying process by the concentrated supervisory computer of passing to of CAN.
(4) the software process of system and realization: on the basis of foreign geophysical prospecting technology, propose a kind of method that garbage landfill yard detects seepage, the method improves the accuracy of leak location preferably.
(5) improve high voltage direct current electrical method seepage further to detect fast (analyzing voltage field multidimensional vector).
(6) propose garbage landfill yard geomembrane to break and leak method for quick, image procossing and method for extracting signal, and break and leak position method for rapidly judging.
In a word, the present invention is by setting up in refuse landfill and the model of Soil Surrounding Electrical Characteristics; Set up the multidimensional voltage differential signal measurement model of computer intelligence vector analysis system; Realize the data acquisition of geomembrane Safety check-up, form geomembrane state of rupture distribution field, realize finding out position accurately fast, the actual leakage scenarios of reflection percolate.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (1)
1. refuse landfill geomembrane seepage method for quick, is characterized in that, adopt detection system to detect, concrete steps comprise:
High-field electrode is embedded in garbage loading embeading outside the venue, test rapier on mobile test dolly is probeed into the surface in soot, slow traveling mobile test dolly, the detection signal collected is transferred to signal processing circuit, data acquisition system (DAS), GPS locating device by multi-faceted test rapier, and sets up system process through computer data analysis and model;
By multipoint voltage difference cloth around test electrode, comprise and distributing with change in depth voltage difference; Then by special software Modling model, difference voltage vector analysis is carried out; Mobile test dolly is according to vector analysis result, and move to voltage difference variation tendency direction a segment distance, and measuring voltage difference cloth, revises test model again again; If refuse landfill geomembrane has damaged infiltration, space electric field distribution plan can judge rapidly geomembrane break by analysis;
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, after filtering noise reduction and signal amplification process are carried out to the signal collected, carry out analog to digital conversion by one 24 analog to digital converters (ADC); Then carrying out real time data processing analysis and record by passing to supervisory computer, carrying out leak source judgement, and positioning record by GPS positioning system;
In testing process, when giving positive and negative two electrode power supplies, when testing circuit does not form loop, due to the insulativity of geomembrane, illustrate that geomembrane does not have breakthrough; When refuse landfill geomembrane has damaged break, electric current forms loop through leak, is obtained voltage variety △ U1 ~ △ U5 of exploring electrode 1 ' ~ 5 ' by measuring system; If the voltage variety that the voltage variety △ U1 of exploring electrode 1 ' is less than 2 ' ~ 5 ', so detecting location and breakthrough 10 distant, the voltage variety that the voltage variety △ U1 of exploring electrode 1 ' is greater than 2 ' ~ 5 ', so detecting location and breakthrough 10 close together;
And by synthesis 1 ', 2 ', 4 ' draws sensing point and breakthrough direction vector, breakthrough position is judged by the direction indication of resultant vector and angle, same method synthesizes other several exploring electrodes, through the synthetic determination of multiple directions vector, determine voltage field change direction and breakthrough scope;
Mobile test dolly to move a segment distance according to change in voltage trend direction, measuring voltage distribution again, judges that direction of motion and distance be whether correct and redefines leak source position, correction test model, duplicate measurements like this several times, can judge geomembrane break rapidly, exactly;
Described detection system, comprising: mobile test dolly, and on described mobile test dolly, system set up by supporting test rapier, signal processing circuit, data acquisition system (DAS), GPS locating device, computer data analysis and model;
Wherein, described test rapier comprises detecting electrode, high-voltage signal emitting electrode and receiving electrode, wherein, described high-voltage signal emitting electrode with accept electrode and be connected with 1000V high-voltage signal source by wire; The positive and negative electrode of detecting electrode is connected on signal acquiring system interface by wire;
Signal processing circuit and data acquisition system (DAS) adopt NI 9213 module, for carrying out filtering noise reduction and signal amplification process to the differential signal collected; And complete analog to digital conversion by 24 analog to digital converter ADC;
GPS locating device, vehicle-mounted detecting system GPS navigation positions record;
System set up by computer data analysis and model, by setting up the multidimensional potential measurement model of computer intelligence vector analysis system, carrying out vector analysis to the differential voltage signal collected, comprising trivector angle and voltage signal Analyzing on Size;
Described test rapier is vertical distribution, at the X of three-dimensional system of coordinate, Y, on Z axis, detects diverse location on XY surface level simultaneously, and the detection signal of depth direction, and probe is uniformly distributed;
Described test rapier is silver-plated probe, and positive electrode and negative electricity be stainless steel or copper very, and profile is column.
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| CN201210386342.2A CN102889967B (en) | 2012-10-12 | 2012-10-12 | Refuse landfill geomembrane seepage rapid detection system and detection method |
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| CN104568334B (en) * | 2014-12-30 | 2018-06-12 | 北京高能时代环境技术股份有限公司 | The quick leakage detection method of geomembrane |
| CN104863189B (en) * | 2015-04-28 | 2017-03-15 | 中国科学院武汉岩土力学研究所 | A kind of damaged leak detection detection system of refuse landfill seepage control layer |
| CN105675237B (en) * | 2016-01-13 | 2018-12-21 | 中国科学院武汉岩土力学研究所 | Refuse landfill seepage control layer leakage location and detection method |
| CN107389531B (en) * | 2017-08-18 | 2021-05-11 | 上海甚致环保科技有限公司 | Leakage monitoring system for geomembrane |
| CN107794882B (en) * | 2017-10-19 | 2020-02-18 | 河海大学 | Geomembrane convenient for large-area leakage detection and leakage detection method thereof |
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| CN109839250B (en) * | 2018-09-27 | 2020-06-30 | 中国环境科学研究院 | Leak detection system of impermeable layer |
| CN109709614B (en) * | 2019-02-25 | 2020-09-04 | 安徽瑞迪工程科技有限公司 | Method for accurately measuring geomembrane permeation holes of refuse landfill by three poles |
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| CN114216621B (en) | 2022-02-21 | 2022-05-17 | 成都理工大学 | Leakage detection and treatment simulation platform and simulation method |
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| 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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| JPH1137886A (en) * | 1997-07-18 | 1999-02-12 | Taisei Corp | Device for detecting water leakage from water intercepting member using high resistance film |
| JP3941895B2 (en) * | 1997-07-18 | 2007-07-04 | 大成建設株式会社 | Device for detecting leakage of water shielding material |
| JP3976211B2 (en) * | 1997-07-18 | 2007-09-12 | 大成建設株式会社 | A device that detects water leakage from a water shielding material using a low-resistance membrane |
| CN1316243C (en) * | 2003-11-26 | 2007-05-16 | 中国环境科学研究院 | Electricity detecting method and equipment for leakage of refuse landfill leaking-proof layer |
| CN1979151A (en) * | 2005-12-07 | 2007-06-13 | 中国环境科学研究院 | Doublet detection method and apparatus for seepage of seepage-proof layer |
| CN101241092B (en) * | 2007-02-07 | 2011-04-13 | 中国环境科学研究院 | Garbage landfill seepage area quick detection device |
| CN101446566A (en) * | 2007-11-28 | 2009-06-03 | 高康 | Method for detecting leaked and damaged position of leakproof geomembrane and device thereof |
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