CN107794882A - A kind of geomembrane and its leakage detection method for being easy to large area leak detection - Google Patents
A kind of geomembrane and its leakage detection method for being easy to large area leak detection Download PDFInfo
- Publication number
- CN107794882A CN107794882A CN201710974229.9A CN201710974229A CN107794882A CN 107794882 A CN107794882 A CN 107794882A CN 201710974229 A CN201710974229 A CN 201710974229A CN 107794882 A CN107794882 A CN 107794882A
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- Prior art keywords
- geomembrane
- single width
- large area
- easy
- leak detection
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
Abstract
Formed the invention discloses a kind of geomembrane for being easy to large area leak detection, including by multiple single width geomembranes are seamless spliced；The upper and lower surface correspondence position of the single width geomembrane presets multiple electrodes, corresponding two electrodes partner, each electrode pair should connect a wire, the each wire mutually insulated, and single width geomembrane surface is attached to, wherein, the wire on every width single width geomembrane is connected to circuit bus by circuit branch line, the corresponding circuit branch line of every width single width geomembrane, the terminal connection instrument board and external power source of the circuit bus；Also disclose the leakage detection method of the geomembrane.The present invention without always on detection device, the effectively save energy, and detection device and geomembrane one, need to only rotate gearshift knob i.e. adjustable measured position during operation, operate easy for construction in leak detection.
Description
Technical field
The present invention relates to geomembrane leak detection technology, more particularly to a kind of geomembrane for being easy to large area leak detection and
Its leakage detection method.
Background technology
Geomembrane have infiltration coefficient is small, elongation percentage is big, environmental benefit good (relative to concrete and clay material antiseepage),
It is light soft and be easy to construction, the advantages that Regional suitability is strong, plant produced quality guarantee rate is high, operation maintenance is more convenient,
Antiseepage field, it is small to arrive roof water-proof, suffer from being widely applied to dyke seepage control, geomembrane greatly.And recently as geotechnique
Membrane material the reach of science, the lifting of geotechnological film properties, the application of geomembrane is just more extensive, increasing using yardstick.
In some large hydraulic engineerings, in such as dam, reservoir, dyke engineering, the application prospect of geomembrane is fine.Geomembrane relies on it
The advantages that being easy to construction, short time limit, low cost, increasingly obtain the favor of numerous engineering staffs.
Geomembrane is in the application aspect of middle weir, and application technology is ripe, experienced, and using effect is fine.Now
Geomembrane develops toward high dam application aspect, and six grades of southern Europe river power station of Laos, 85 meters of height of dam, what is used is exactly composite earth
The exposed antiseepage of work film.The application of geomembrane is also many in terms of reservoir seepage-proofing, and it is as follows only to enumerate partial example herein：Draw water Liyang
Storage station, geomembrane are used for upper storage reservoir bottom storehouse antiseepage, laying area 250,000 m2；Tai'an Pumped Storage Power Station, upper storage reservoir bottom storehouse
Geomembrane anti-seepage, laying area about 17.7 ten thousand m2；South water to north east line northern Shandong section collects greatly reservoir, and PE geotechniques are laid in storehouse disk antiseepage altogether
The m of film 5,010,0002；Mashan hydroenergy storage station, bottom storehouse geomembrane laying area 23.5 ten thousand m2；Jurong hydroenergy storage station, bottom storehouse soil
The m of work membrane area 49.1 ten thousand2.As can be seen here, in many engineerings, the usage amount of geomembrane is very big, up to hundreds of thousands square metre.
In engineering of the large area using geomembrane, geomembrane the leak detection of construction time and runtime the problem of just
Seem very prominent, this is probably to limit the critically important factor that geomembrane large area uses.Although current geomembrane oozes
The technology of leak detection has had a lot, such as：Bipolar electrode method, resistivity method (electrode grid method), HVDC electrical method, underground water prison
Survey method, diffusion denuder method, capacitance sensor method, tracer method etc., but these methods are mainly used for detecting a small range geotechnique
The leakage scenarios of film, leak detection problem of the underwater geomembrane of large area in the runtime can not be efficiently solved.It is although distributed
Fiber Optic Pyrometer can realize a wide range of thermometric, but on the one hand it is disturbed by level of ground water rising, on the other hand big
In the range of using expensive.The Cleaning Principle of electric method is the electric conductivity of the electrical insulating property and liquid using geomembrane, if
Geomembrane is not damaged, then because the insulating properties of geomembrane can not form current loop, can't detect signal；If geomembrane
Breakage, electric current will form current loop by breakage (leak), so as to detect electric signal, according to detection signal
The regularity of distribution positions leak.Current this method is very vibrant in terms of geomembrane seepage measurement, but also nobody is had
It is applied in large area geomembrane leak detection problem to effect.
In engineering of the large area such as reservoir bottom antiseepage using geomembrane, after reservoir filling is run, if somewhere
Breakage, which occurs, for geomembrane causes seepage, it is difficult to timely and effectively measure the position of geomembrane damage, this just significantly limit
The large area of geomembrane uses.
The content of the invention
Goal of the invention：The first object of the present invention is to provide a kind of geomembrane for being easy to the underwater leak detection of large area, the
Two purposes are to provide the leakage detection method of the geomembrane.
Technical scheme：The geomembrane for being easy to large area leak detection of the present invention, including it is seamless by multiple single width geomembranes
It is spliced；The upper and lower surface correspondence position of the single width geomembrane presets multiple electrodes, and corresponding two electrodes partner, institute
A wire, each wire mutually insulated should be connected by stating each electrode pair, and be attached to single width geomembrane surface, make geotechnique
Film, electrode and wire turn into an organic whole, wherein, the wire on every width single width geomembrane is connected to by circuit branch line
Circuit bus, the corresponding circuit branch line of every width single width geomembrane, mutually insulated between each circuit, the terminal of the circuit bus connect
Connect instrument board and external power source.
The instrument board connect is provided with multiple rotary switches, and each rotary switch correspondingly connects the electricity of every width single width geomembrane
Road branch line, and the different stalls of each rotary switch correspondingly connect difference on single width geomembrane to electrode.
Each rotary switch is provided with the both positive and negative polarity interface being connected with external power source simultaneously.
So that reach what is be powered using external power source for the circuit of certain a pair of electrodes by rotating to different stalls
Purpose.
In order that the wire adhered on geomembrane does not influence the splicing between two width geomembranes, pass through two width geotechnique in wire
The opening position of film splicing, groove can be reserved in production to the geomembrane at this, in the groove for making wire insertion geomembrane, just
The welding of geomembrane can not be influenceed.
Further, the single width geomembrane both sides are enclosed with geotextiles, play a part of protecting geomembrane.
Meanwhile it can realize the fast and effective connection between wire by crossover sub, connect a wire to conversion and connect
Head, the crossover sub are combined by projecting plug and groove connector, it is possible to achieve the fast and effective company of wire during construction
Connect.
The leakage detection method of the geomembrane for being easy to large area leak detection, comprises the following steps：
(1) geomembrane in region to be detected is divided into multiple detection units first with the thought to break the whole up into parts, each
Detection unit forms including multiple single width geomembranes, and each detection unit is all connected with instrument board；
(2) using by the thick thought to essence, rough seepage judgement first is carried out to detection unit, the row of setting in detection unit
Aquaporin, by measure analysis drainage channel in flow velocity and hydraulic pressure information, judge the detection unit whether seepage；
(3) selection has the detection unit of seepage, leak location is finely judged, by the way that external power source is accessed into the detection successively
Rotary switch in unit corresponding to each single width geomembrane, and shifted gears by rotating, select to the difference in single width geomembrane
Voltage is applied to electrode, whether to electrode corresponding circuits produce electric current, thus if testing measured this by current testing device
Carry out leak detection, such as produce electric current, then it is corresponding this be leak location to electrode position.
The step (2) is specially：The drainage channels such as draining blind pipe are set in detection unit, set inside draining blind pipe
The leak detection apparatus such as current meter or osmometer are put, and measured information is transferred to information by wired or wireless way
Processing terminal, the information is analyzed by the information processing terminal, judges whether seepage occur in the detection unit.
Beneficial effect：Compared with prior art, advantages of the present invention is：(1) first, the geomembrane that this patent proposes carries
Self-checking function, just detection device is organically combined with geomembrane in advance in plant produced, it is not only effective to ensure
Quality, and facilitate construction；(2) secondly, this patent is utilized by the thick thought to essence, and realization of proceeding in two phases is to large area soil
The detection of work film seepage, it is not necessary to always on all detection devices, effectively saved the energy；(3) as long as this patent is simple
Pass through singlely and rotate knob of shifting gears, it is possible to which convenient realize applies voltage, operation to electrode to the difference on single width geomembrane
It is very convenient.
Brief description of the drawings
Fig. 1 is the geomembrane structural representation that the present invention is easy to large area leak detection；
Fig. 2 is the partial enlarged drawing of Fig. 1 geomembranes；
Fig. 3 is single width geomembrane electrode plane layout drawing of the present invention；
Fig. 4 is single width geotechnique mould cross-sectional view of the present invention；
Fig. 5 is that single width geomembrane junction of the present invention constructs enlarged drawing；
Fig. 6 is crossover sub schematic diagram in junction of the present invention；
Fig. 7 is circuit bus end instrument disk schematic diagram of the present invention.
Embodiment
The technical scheme of invention is described further below in conjunction with the accompanying drawings.
The geomembrane for being easy to large area leak detection as depicted in figs. 1 and 2, including it is seamless by multiple single width geomembranes 1
It is spliced；Geomembrane uses 2.0mm thickness HDPE geomembranes, and single width geomembrane 1 wide 5m, long 100m, three row geomembrane form one
Detection unit 101 is often capable to have 5 width single width geomembranes 1.
As shown in Figure 3 and Figure 4, the upper and lower surface correspondence position of every width single width geomembrane 1 presets 8 electrodes 2, corresponding
Two electrodes 2 partner, totally 4 pairs, and electrode is using plating ruthenium titanium plate electrode (diameter 50mm, thickness 1mm), each electrode 2
It is corresponding to connect a wire 3, there is insulating covering isolation between each wire 3, and the surface of single width geomembrane 1 is attached to, wherein,
Wire 3 on every width single width geomembrane 1 is connected to circuit bus 5 by circuit branch line 4, and every width single width geomembrane 1 is corresponding one
Circuit branch line 4, the corresponding circuit bus 5 of each detection unit 101, the terminal connection He of instrument board 6 of the circuit bus 5
External power source.
As shown in figure 5, the instrument board 6 is provided with multiple rotary switches 601, the corresponding connection of each rotary switch 601 is every
The circuit branch line of width single width geomembrane 1.
The different stalls of each rotary switch 601 correspondingly connect different to electrode 2 on single width geomembrane 1.
Each rotary switch 601 is provided with the both positive and negative polarity interface 602 being connected with external power source, can be shifted gears by rotating
Knob 603 adjusts different pairs of electrode and detected.
As shown in fig. 6, the connection end of the adjacent single width geomembrane 1 is provided with the groove being embedded in for wire 3, and in single width soil
Wrap up covered with geotextiles 7 both sides of work film 1.
As shown in fig. 7, the end of the wire and wire is connected by crossover sub 9, the crossover sub is by projecting plug
901 and groove connector 902 combine.
The leakage detection method of the geomembrane for being easy to large area leak detection comprises the following steps：
(1) geomembrane in region to be detected is divided into multiple detection units 101, each detection unit 101 includes multiple
Single width geomembrane 1 forms, and each detection unit 101 is all connected with instrument board 6；
(2) in the centrally disposed draining blind pipe 8 of detection unit 101, whole detection unit 101 is passed through in draining blind pipe 8, simultaneously
The draining blind pipe of smaller diameter is arranged every 10m perpendicular to draining blind pipe, it is therefore an objective to by the percolating water in the region of detection unit 101
Guide in draining blind pipe 8 and discharge, current meter or osmometer be set inside draining blind pipe 8, and by measured flow velocity and water
The information transfer of pressure is analyzed to the information processing terminal, and to the information, judges whether oozed in the detection unit 101
Leakage；
(3) selection has the detection unit of seepage, finds out end instrument disk corresponding with the detection unit, and selection is single successively
Rotary switch 601 corresponding to width geomembrane 1, external power source is connected on corresponding to rotary switch 601 at both positive and negative polarity interface 602,
Rotation gearshift knob 603 successively, to different to electrode application voltage on single width geomembrane, if finding certain to electrode during power supply
Corresponding circuit has electric current, and this can be proved to having seepage in control range corresponding to electrode.
Claims (9)
- A kind of 1. geomembrane for being easy to large area leak detection, it is characterised in that：Including by the seamless spelling of multiple single width geomembranes (1) Connect and form；The upper and lower surface correspondence position of the single width geomembrane (1) presets multiple electrodes (2), corresponding two electrodes (2) composition A pair, a piece wire (3) of each corresponding connection of electrode (2), each wire (3) mutually insulated, and it is attached to single width Geomembrane (1) surface, wherein, the wire (3) on every width single width geomembrane (1) is connected to circuit bus by circuit branch line (4) (5), the corresponding circuit branch line (4) of every width single width geomembrane (1), the terminal connection instrument board (6) of the circuit bus (5) and External power source.
- 2. the geomembrane according to claim 1 for being easy to large area leak detection, it is characterised in that：The instrument board (6) It is provided with multiple rotary switches (601), the corresponding circuit branch line for connecting every width single width geomembrane (1) of each rotary switch (601).
- 3. the geomembrane according to claim 2 for being easy to large area leak detection, it is characterised in that：Each rotation is opened The different stalls of pass (601) correspondingly connect different to electrode (2) on single width geomembrane (1).
- 4. the geomembrane according to claim 2 for being easy to large area leak detection, it is characterised in that：Each rotation is opened Close (601) and be provided with the both positive and negative polarity interface (602) being connected with external power source.
- 5. the geomembrane according to claim 1 for being easy to large area leak detection, it is characterised in that：The adjacent single width soil The connection end of work film (1) is provided with for the embedded groove of wire (3).
- 6. the geomembrane according to claim 1 for being easy to large area leak detection, it is characterised in that：The single width geomembrane (1) both sides are enclosed with geotextiles (7).
- 7. the geomembrane according to claim 1 for being easy to large area leak detection, it is characterised in that：The wire and wire End connected by crossover sub, the crossover sub is combined by projecting plug and groove connector.
- 8. being easy to the leakage detection method of the geomembrane of large area leak detection described in claim 1 or 2 or 3 or 4, its feature exists In：Comprise the following steps：(1) geomembrane in region to be detected is divided into multiple detection units, each detection unit includes multiple single width geomembranes Composition, each detection unit are all connected with instrument board；(2) drainage channel is set in detection unit, by measuring flow velocity and hydraulic pressure information in analysis drainage channel, judges the inspection Survey unit whether seepage；(3) selection has the detection unit of seepage, by the way that external power source is accessed into each single width geomembrane in the detection unit successively Corresponding rotary switch, and shifted gears by rotating, select to apply voltage to electrode to the difference in single width geomembrane, pass through electricity Whether this measured by current test device to test produces electric current to electrode corresponding circuits, thus carries out leak detection.
- 9. the leakage detection method of the geomembrane according to claim 8 for being easy to large area leak detection, it is characterised in that： The step (2) is specially：Draining blind pipe 8 is set in detection unit, current meter or osmotic pressure are set inside draining blind pipe 8 Meter, and by measured information transfer to the information processing terminal, and the information is analyzed, judge in the detection unit whether There is seepage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710974229.9A CN107794882B (en) | 2017-10-19 | 2017-10-19 | Geomembrane convenient for large-area leakage detection and leakage detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710974229.9A CN107794882B (en) | 2017-10-19 | 2017-10-19 | Geomembrane convenient for large-area leakage detection and leakage detection method thereof |
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| CN107794882B CN107794882B (en) | 2020-02-18 |
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Cited By (5)
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| CN108755595A (en) * | 2018-06-27 | 2018-11-06 | 红河哈尼族彝族自治州水利水电工程地质勘察咨询规划研究院 | A kind of reservoir basin anti-seepage geomembrane leakage apparatus for examination and repair and its repair method |
| CN109403270A (en) * | 2018-09-26 | 2019-03-01 | 中国中元国际工程有限公司 | A kind of fixed drainage exhaust part and the construction method of hunting leak of geomembrane of hydroenergy storage station |
| CN109738138A (en) * | 2019-01-31 | 2019-05-10 | 河北工程大学 | A kind of method and system using traveling wave positioning HDPE film leak location |
| CN110952506A (en) * | 2019-12-16 | 2020-04-03 | 兰州理工大学 | Self-conveying water-stone separated type flood discharge aqueduct and construction method |
| CN114509217A (en) * | 2022-01-24 | 2022-05-17 | 中国长江三峡集团有限公司 | Reservoir leakage detection device and detection method thereof |
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| CN114509217B (en) * | 2022-01-24 | 2023-10-20 | 中国长江三峡集团有限公司 | Reservoir leakage detection device and detection method thereof |
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