CN107478392B - It is coastal into drainage gate facility leakage detection method based on radon isotope - Google Patents
It is coastal into drainage gate facility leakage detection method based on radon isotope Download PDFInfo
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- CN107478392B CN107478392B CN201710858831.6A CN201710858831A CN107478392B CN 107478392 B CN107478392 B CN 107478392B CN 201710858831 A CN201710858831 A CN 201710858831A CN 107478392 B CN107478392 B CN 107478392B
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- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229910052704 radon Inorganic materials 0.000 title claims abstract description 119
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 230000000694 effects Effects 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000013535 sea water Substances 0.000 claims abstract description 36
- 230000009545 invasion Effects 0.000 claims abstract description 16
- 239000013505 freshwater Substances 0.000 claims abstract description 12
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000003643 water by type Substances 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 101100032908 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RAD7 gene Proteins 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 239000002352 surface water Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052705 radium Inorganic materials 0.000 description 2
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- BWJGGLDSZPWFHM-UHFFFAOYSA-N radon hydrate Chemical compound O.[Rn] BWJGGLDSZPWFHM-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000008674 spewing Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Radiation (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Coastal based on radon isotope provided by the invention has into drainage gate facility leakage detection method, step：According to the freshwater shape in sluice inner portions, measuring point grid is evenly dividing；Water body sample collection, gather the water sample of same depth and storage in each measuring point grid, the real time measure water sample radon activity, draw into drainage gate radon activity distribution map, choose radon activity variable region grid, it is vertical by certain depth interval collection water sample to being carried out at its actual coordinate, while gather seawater outside sluice and carry out radon activity ratio pair into the underground water water sample near draining sluice, so that comprehensive identification breakthrough three-dimensional coordinate and leak path.The technical principle of the detection method has perfect physical mechanism, and operation clear route is clear and definite, and detecting step integrates multi-source information to identify breakthrough three-dimensional coordinate and leak path by high-resolution grid；The seawater invasion amount and underground water leakage for distinguishing leakage can be quantified, detection process is simple and quick, reaches the effect of Non-Destructive Testing.
Description
Technical field
The invention belongs to hydraulic engineering leak detection field, concretely relates to coastal into draining based on radon isotope
Lock facility leakage detection method.
Background technology
The pith that exploitation is territory comprehensive improvement is enclosed and cultivated in Coastal beach soil, and new reclamation area is often by seawater invasion
Threaten, cause the soil salinization, reclamation area farmland, which is protected, pours area reduction.Prevent the new reclamation area of seawater invasion, it is necessary to which solution is widely present
Into drainage gate facility leakage problems.At present, the research on coastal reclamation area sluice leak detection is less, and is difficult to distinguish sea
Water is invaded and underground water leakage quantity and path, this hinders the development of correlation engineering or non-engineering reclamation activities significantly.Tradition
Method is mainly geophysical prospecting method, such as resistivity method, radar geophysical survey and pseudorandom flow-field method.Resistivity method and radar geophysical survey lead to
Cross detection hydraulic structure surface, inside there are the defects of, judge the position where leakage, but this detection method generally needs
Storehouse water is drained, workload is huge, and detection error is big；Pseudorandom flow-field method is made using current density field fitting piping and seepage
Into abnormal flow velocity field distribution, detection depth be restricted it is larger, as a result exist uncertainty.It can be seen from the above that traditional leakage inspection
Survey method is badly in need of a kind of quick, accurate, practical new leakage detection method of exploitation, is especially strengthened there are a series of problems
Develop a kind of in water surface development high-resolution, high-precision detection method.
The content of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of based on radon isotope, high-resolution
Detect the implementation method that coastal reclamation area is leaked into drainage gate facility.
To solve the above problems, the present invention specifically uses following technical scheme：
It is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that to comprise the following steps：
Step 1：According to the freshwater shape into drainage gate inner portions, point grid is evenly dividing on freshwater surface
Lattice；
Step 2：Water body sample collection, gathers the water sample of same depth and storage in each measuring point grid；
Step 3：Radon activity in the water sample gathered in the real time measure step 2；
Step 4：Using measuring point grid position and corresponding radon activity test result, draw into drainage gate radon activity and be distributed
Figure, analyzes the radon activity regularity of distribution, chooses radon activity variable region grid；
Step 5：According to the radon activity variable region grid chosen in step 4, pressing certain depth at its actual coordinate
Every laying measuring point group, vertical collection water sample is carried out, while is gathered into seawater outside drainage gate and into the underground water near drainage gate
Water sample, repeat step 3 measure each water sample radon activity；
Step 6：Each water sample radon activity gathered in step 5 is compared, so that comprehensive identification breakthrough three-dimensional coordinate
And leak path.
Foregoing is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that institute in step 6
Comprehensive identification breakthrough three-dimensional coordinate and leak path are stated, is divided into following two considerations：
(1) if radon activity variable region grid appears in freshwater surrounding with being connect into drainage gate gate, embankment in step 4
On tactile border, then it is assumed that seawater invasion is only existed, and breakthrough is located at gate or embankment, with reference to each water sample radon activity space
Change judges leak path；
(2), should if radon activity variable region grid is appeared in inside the non-waters contacted with gate, embankment in step 4
Grid corresponding bottom in radon activity variable region judges leak path there are breakthrough with reference to each water sample radon activity spatial variations,
If seawater invasion and underground water leakage exist at the same time, maximum radon activity is C1 wherein in the grid of radon activity variable region, seawater radon
Activity is C2, and Radon In Groundwater activity is C3, and the breakthrough seawater invasion amount and underground water leakage proportion is calculated：
Seawater invasion amount/underground water leakage=(C1-C3)/(C2-C1).
Foregoing is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that the step 1
Middle measuring point grid is the class square net that the length of side is 0.5-2m.
Foregoing is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that the step 2
The depth of water body is 0.3-0.5m in middle each measuring point grid of collection, and collection water sample specification is 250ml.
Foregoing is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that the step 3
The instrument of middle measure radon activity is RAD7 and RADH20 water accessories.
Foregoing is coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that the step 5
In by certain depth interval lay measuring point group, carry out vertical collection water sample at intervals of 0.1-0.3m, and measuring point group ensures there is one
Measuring point is at the bottom.
Radon (222Rn) is a kind of inertia radgas of naturally occurring colorless and odorless, and radon has stronger diffusion energy
Power, the solubility with temperature of radon in water is raised and reduced, and is easy to escape from water in a short time.Generally acknowledged, radon is from soil
After being separated out in earth and rock, the water body in gap so that underground water has higher radon activity.Body of groundwater is in migration process
In, constantly exchanged with surface water body so that surface water body can also obtain certain radon.But since the radon source of surface water body is few,
And radon is constantly to air loss, along with the decay of radon itself so that body of groundwater radon activity is generally higher by two than surface water body
To three orders of magnitude.Seawater is surface water body, and radon activity value is relatively low.Seawater is leaked into drainage gate, is transported in seawater
The supply of the radon that radium decay produces in rock and soil can be received during shifting so that this water body obtains higher radon activity
Value.Original water body is surface fresh water in into drainage gate, and radon consistence is very low, since the underground water around seawater invasion or sluice is anti-
To leakage, it can cause the radon activity value near breakthrough that significant variation occurs, can accurate tracer breakthrough with this.
Accordingly, the coastal principle into drainage gate facility leakage detection method based on radon isotope is：This method thinks radon
Isotope is the natural food essence agent being present in water body, into drainage gate, if water body somewhere measuring point radon activity shows exception
High level, illustrates there is extra radon supply source at this, and general water conservancy project building material such as concrete, steel etc. are not radon
Generation source, show to measure neighbouring hydro-structure and occur damaged, there are seawater or underground water leakage scenarios.It is each by measuring
The radon activity in measuring point grid is divided, draws radon activity flat distribution map, to position leakage region, tentatively judges seeping reason；
Secondly vertical monitoring is carried out to radon activity variable region, then by recognizing seawater outside gate, the water body such as underground water near gate
The difference of radon activity, further determines that the three-dimensional coordinate of breakthrough, draws out leak path.
Beneficial effects of the present invention are：
1st, technical principle has perfect physical mechanism, by recognizing the difference of water body radon isotope activity, can accurately take off
Show breakthrough and leak path；
2nd, it is clear and definite to operate clear route, detecting step progressively reduces leakage scope by high-resolution grid, and synthesis is more
Source information identifies breakthrough position and leak path；
3rd, detection means is comprehensive, and testing result confidence level is higher, can quantify the seawater invasion amount for distinguishing, identifying leakage
And underground water leakage；
4th, detection process is simple and quick, and cost expenses are relatively low, while need not drain storehouse water, does not influence into drainage gate just
Often work, reaches the effect of Non-Destructive Testing.
Brief description of the drawings
Fig. 1 is the coastal flow diagram into drainage gate facility leakage detection method based on radon isotope；
Fig. 2 is the implementation process schematic diagram of this detection method；
Fig. 3 is the vertical monitoring schematic diagram of radon activity variable region grid in this detection method；
Fig. 4 is measurement waters radon activity Two dimensional Distribution schematic diagram in embodiment.
Reference numeral is as follows：
1 is into drainage gate, and 2 be freshwater, and 3 be measuring point grid, and the 4 radon activity variable region grid to choose, 5 be vertical
To measuring point group, 6 be into seawater outside drainage gate, and 7 be that 8 be embankment into the underground water near drainage gate.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
The present embodiment be using Jiangsu Province northern Suzhou coastal reclamation area into drainage gate as research object, be used as water by the use of radon isotope
Natural food essence agent in body, measures the radon activity for being detained water body, seawater, underground water into Its Adjacent Waters on the inside of drainage gate, comprehensive fixed
The position of position breakthrough.
It is coastal into drainage gate facility leakage detection method based on radon isotope, as depicted in figs. 1 and 2, including have as follows
Body step：
Step 1：According to the shape of freshwater 2 on 2 surface of freshwater into 1 inner portions of drainage gate, uniformly draw
Divide the square measuring point grid 3 that the length of side is 0.5-2m；
Step 2：Water body sample collection, the water sample 250ml that depth in each measuring point grid is 0.3m is gathered by supplementary means
And store；
Step 3：The real time measure water sample radon activity, water body radon activity utilize RAD7 and RAD H20 (DURRIDGE Company
Inc.) measure, this device detection limit value (counts 20 minutes) for 10pCi/L, water body radon consistence measure foundation《Radon and its daughter
Specifications of surveys》(EJ/T 1133-2001)；
Step 4：Using 3 position of measuring point grid and corresponding radon activity test result, draw into drainage gate radon activity two dimension
Distribution map, as shown in figure 4, the analysis radon activity regularity of distribution, chooses radon activity variable region grid 4；
Step 5：According to the radon activity variable region grid 4 chosen in step 4, being carried out at its actual coordinate by depth
It is divided into 0.1m and lays the vertical collection of measuring point group 5 water sample, and ensures there is a measuring point in measuring point group 5 at the bottom, as shown in figure 3,
Gather at the same time into 6 water sample of seawater outside drainage gate and measure each water sample into 7 water sample of underground water near drainage gate, repeat step 3
Radon activity；
Step 6：Each water sample radon activity gathered in step 5 is compared, so that comprehensive identification breakthrough three-dimensional coordinate
And leak path.
Further, comprehensive identification breakthrough position and leak path, are divided into following two considerations：
(1) if radon activity variable region grid appears in the border that waters surrounding is contacted with sluice 1, embankment 8 in step 4
On, then it is assumed that only exist seawater invasion, and breakthrough is located at sluice 1, at embankment 8, sentences with reference to each water sample radon activity spatial variations
Disconnected leak path；
(2) if radon consistence variable region grid is appeared in inside the non-waters contacted with sluice 1, embankment 8 in step 4,
The corresponding bottom of the grid judges leak path, it is assumed that seawater invasion there are breakthrough with reference to each water sample radon activity spatial variations
And underground water leakage exists at the same time, maximum radon activity is C1 wherein in the grid of radon consistence variable region, and seawater radon activity is C2, ground
Lower water radon activity is C3, and the breakthrough seawater invasion amount and underground water leakage proportion is calculated：
Seawater invasion amount/underground water leakage=(C1-C3)/(C2-C1).
No.1-No.14 each points are expressed as the position of measuring point grid in Fig. 4, are evenly distributed on freshwater 2.By the figure
Understand, average radon activity is at the radon activity variable region grid 4 into the left side of drainage gate 1 with 8 delivery position of embankment
4930Bq/m3, the radon activity that is significantly larger than measured in seawater 6, also above the radon activity measured in underground water 7.Hung down according to step 5
Radon activity monitoring to the measuring point group each point of laying judges and that according to the principle breakthrough position is located at the left side of sluice 1 and dike
The bottom of the radon activity variable region grid 4 of 8 junction of bank.
No.9, No.1, No.8, No.10 tetra- sentences No.9 measuring points and tapers off around distribution for center of circle radon activity value, exists
Radon diffusion phenomena.In view of the actual condition into drainage gate scene, the radon at the corresponding radon activity variable region grids 4 of No.9 is mended
Can only be the seawater that its outboard leak enters to source.Concrete, steel are not the generation source of radon, this shows that radon activity makes a variation
Breakage may occur in hydro-structure at area grid 4, after seawater is reversely invaded, since radium declines in underground and rock
The radon supply of change so that the seawater leaked into becomes the water body of high radon activity.
Result verification：In engineering repair process, drained, after dredging into delay water body in drainage gate 1, it is corresponding in No.9
Observe obvious seawater spewing phenomenon in bottom.
Basic principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the original of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (5)
- It is 1. coastal into drainage gate facility leakage detection method based on radon isotope, it is characterised in that to comprise the following steps：Step 1：According to the freshwater shape into drainage gate inner portions, measuring point grid is evenly dividing on freshwater surface；Step 2：Water body sample collection, gathers the water sample of same depth and storage in each measuring point grid；Step 3：Radon activity in the water sample gathered in the real time measure step 2；Step 4：Using measuring point grid position and corresponding radon activity test result, draw into drainage gate radon activity distribution map, point The radon activity regularity of distribution is analysed, chooses radon activity variable region grid；Step 5：According to the radon activity variable region grid chosen in step 4, to pressing certain depth interval cloth at its actual coordinate If measuring point group, vertical collection water sample is carried out, while is gathered into seawater outside drainage gate and into the underground water water sample near drainage gate, Repeat step 3 measures each water sample radon activity；Step 6：Each water sample radon activity gathered in step 5 is compared, is divided into following two considerations：（1）If radon activity variable region grid appears in freshwater surrounding and is contacted with into drainage gate gate, embankment in step 4 On border, then it is assumed that seawater invasion is only existed, and breakthrough is located at gate or embankment, with reference to each water sample radon activity spatial variations Judge leak path；（2）If radon activity variable region grid is appeared in inside the non-waters contacted with gate, embankment in step 4, which lives The corresponding bottom of variable region grid is spent there are breakthrough, leak path is judged with reference to each water sample radon activity spatial variations, if extra large Water is invaded and underground water leakage exists at the same time, and maximum radon activity is C1 wherein in the grid of radon activity variable region, seawater radon activity For C2, Radon In Groundwater activity is C3, and the breakthrough seawater invasion amount and underground water leakage proportion is calculated：Seawater invasion amount/underground water leakage=(C1-C3)/(C2-C1)So as to comprehensive identification breakthrough three-dimensional coordinate and leak path.
- 2. coastal based on radon isotope according to claim 1 exists into drainage gate facility leakage detection method, its feature In measuring point grid is the square net that the length of side is 0.5-2m in the step 1.
- 3. coastal based on radon isotope according to claim 1 exists into drainage gate facility leakage detection method, its feature In the depth that water body in each measuring point grid is gathered in the step 2 is 0.3-0.5m, and collection water sample specification is 250ml.
- 4. coastal based on radon isotope according to claim 1 exists into drainage gate facility leakage detection method, its feature In the instrument that radon activity is measured in the step 3 is RAD7 and RADH20 water accessories.
- 5. coastal based on radon isotope according to claim 1 exists into drainage gate facility leakage detection method, its feature In, lay measuring point group by certain depth interval in the step 5, carry out vertical collection water sample at intervals of 0.1-0.3m, and survey Point group guarantee has a measuring point at the bottom.
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| CN107478392B true CN107478392B (en) | 2018-04-20 |
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2017
- 2017-09-21 CN CN201710858831.6A patent/CN107478392B/en not_active Expired - Fee Related
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Application publication date: 20171215 Assignee: Jiangsu Yuzhi Basin Management Technology Research Institute Co.,Ltd. Assignor: HOHAI University Contract record no.: X2022320000123 Denomination of invention: Leakage detection method of coastal intake and discharge sluice facilities based on radon isotope Granted publication date: 20180420 License type: Common License Record date: 20220627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 |