CN107478392A - Based on radon isotope it is coastal enter drainage gate facility leakage detection method - Google Patents
Based on radon isotope it is coastal enter drainage gate facility leakage detection method Download PDFInfo
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- CN107478392A CN107478392A CN201710858831.6A CN201710858831A CN107478392A CN 107478392 A CN107478392 A CN 107478392A CN 201710858831 A CN201710858831 A CN 201710858831A CN 107478392 A CN107478392 A CN 107478392A
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- drainage gate
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- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 229910052704 radon Inorganic materials 0.000 title claims abstract description 121
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000013535 sea water Substances 0.000 claims abstract description 37
- 230000009545 invasion Effects 0.000 claims abstract description 17
- 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
- 230000004907 flux Effects 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
- 239000002689 soil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 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
It is provided by the invention based on radon isotope it is coastal enter drainage gate facility leakage detection method, step has：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 the underground water water sample for gathering seawater outside sluice and entering near draining sluice carries out radon activity ratio pair, so as to 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 relate to based on radon isotope it is coastal enter draining
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 and treat the new reclamation area of seawater invasion, it is necessary to which solution is widely present
Enter 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 seepage quantity and path, and 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, the defects of inside is present, judge the position where seepage, but this detection method typically 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.As can be seen here, traditional seepage inspection
There is a series of problems in survey method, be badly in need of a kind of quick, accurate, practical new leakage detection method of exploitation, especially strengthen
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 invention provides a kind of based on radon isotope, high-resolution
Detect that the implementation method of drainage gate facility seepage is entered in coastal reclamation area.
To solve the above problems, the present invention specifically uses following technical scheme：
Based on radon isotope it is coastal enter drainage gate facility leakage detection method, it is characterised in that comprise the following steps：
Step 1：According to the freshwater shape for entering drainage gate inner portions, point grid is evenly dividing on freshwater surface
Lattice；
Step 2：Water body sample collection, gather 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, the radon activity regularity of distribution is analyzed, choose 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 the underground water entered near drainage gate
Water sample, repeat step 3 determine each water sample radon activity；
Step 6：Each water sample radon activity gathered in step 5 is compared, so as to comprehensive identification breakthrough three-dimensional coordinate
And leak path.
It is foregoing based on radon isotope it is coastal enter drainage gate facility leakage detection method, 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 and enters drainage gate gate in step 4, embankment connects
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
There is breakthrough in bottom corresponding to the grid of radon activity variable region, judge leak path with reference to each water sample radon activity spatial variations,
If seawater invasion and underground water seepage are present simultaneously, 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).
It is foregoing based on radon isotope it is coastal enter drainage gate facility leakage detection method, 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.
It is foregoing based on radon isotope it is coastal enter drainage gate facility leakage detection method, it is characterised in that the step 2
The depth of middle each measuring point grid reclaimed water body of collection is 0.3-0.5m, and collection water sample specification is 250ml.
It is foregoing based on radon isotope it is coastal enter drainage gate facility leakage detection method, it is characterised in that the step 3
The instrument of middle measure radon activity is RAD7 and RADH20 water accessories.
It is foregoing based on radon isotope it is coastal enter drainage gate facility leakage detection method, 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, solubility with temperature of the 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 space 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 because 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 typically 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 radon caused by radium decay in rock and soil can be received during shifting so that this water body obtains higher radon activity
Value.It is surface fresh water to enter original water body in drainage gate, and radon consistence is very low, because the underground water around seawater invasion or sluice is anti-
To seepage, it can cause the radon activity value near breakthrough that significant variation occurs, can accurate tracer breakthrough with this.
Accordingly, based on radon isotope it is coastal enter drainage gate facility leakage detection method principle be：This method thinks radon
Isotope is the natural food essence agent being present in water body, is being entered in drainage gate, if water body somewhere measuring point radon activity shows exception
High level, illustrate there is extra radon supply source at this, general water conservancy project building material such as concrete, steel etc. are not radon
Generation source, show to determine neighbouring hydro-structure and occur damaged, seawater or underground water leakage scenarios be present.It is each by determining
The radon activity in measuring point grid is divided, radon activity flat distribution map is drawn, to position seepage 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, the three-dimensional coordinate of breakthrough is further determined that, 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 seepage 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, reach the effect of Non-Destructive Testing.
Brief description of the drawings
Fig. 1 be based on radon isotope it is coastal enter drainage gate facility leakage detection method schematic flow sheet；
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 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 that 7 be into the underground water near drainage gate, and 8 be embankment into seawater outside drainage gate.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
The present embodiment is to enter drainage gate as research object using Jiangsu Province northern Suzhou coastal reclamation area, and water is used as by the use of radon isotope
Natural food essence agent in body, the radon activity for being detained water body, seawater, underground water into Its Adjacent Waters on the inside of drainage gate is determined, it is comprehensive fixed
The position of position breakthrough.
Based on radon isotope it is coastal enter drainage gate facility leakage detection method, as depicted in figs. 1 and 2, including following tool
Body step：
Step 1：According to the shape of freshwater 2 on the surface of freshwater 2 for enter the inner portions of drainage gate 1, 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.) determine, this device detection limit value is 10pCi/L (counting 20 minutes), and water body radon consistence determines foundation《Radon and its daughter
Specifications of surveys》(EJ/T 1133-2001)；
Step 4：Using the position of measuring point grid 3 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 simultaneously into the water sample of seawater 6 outside drainage gate and the water sample of underground water 7 entered near drainage gate, repeat step 3 and determine each water sample
Radon activity；
Step 6：Each water sample radon activity gathered in step 5 is compared, so as to 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 contacts 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,
There is breakthrough in bottom corresponding to the grid, judge leak path with reference to each water sample radon activity spatial variations, it is assumed that seawater invasion
And underground water seepage is present simultaneously, 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, be located at into the left side of drainage gate 1 and be with average radon activity at the radon activity variable region grid 4 of the delivery position of embankment 8
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 the junction of bank 8.
No.9, No.1, No.8, No.10 tetra- sentences No.9 measuring points and tapered off distribution to surrounding for center of circle radon activity value, exists
Radon diffusion phenomena.The actual condition into drainage gate scene is considered, the radon corresponding to No.9 at radon activity variable region grid 4 is mended
Can only be the seawater that its outboard leak enters to source.Concrete, steel are not the generation source of radon, and this shows that radon activity makes a variation
Breakage may occur in hydro-structure at area grid 4, after seawater is reversely invaded, because 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 desilting entering in drainage gate 1 to be detained water body, corresponding to No.9
Observe obvious seawater spewing phenomenon in bottom.
General 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, the original for simply illustrating the present invention described in above-described embodiment and specification
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 (6)
1. based on radon isotope it is coastal enter drainage gate facility leakage detection method, it is characterised in that comprise the following steps：
Step 1：According to the freshwater shape for entering drainage gate inner portions, measuring point grid is evenly dividing on freshwater surface；
Step 2：Water body sample collection, gather 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 the underground water water sample entered near drainage gate,
Repeat step 3 determines each water sample radon activity；
Step 6：Each water sample radon activity gathered in step 5 is compared, so as to comprehensive identification breakthrough three-dimensional coordinate and oozed
Flux leakage path.
2. it is according to claim 1 based on radon isotope it is coastal enter drainage gate facility leakage detection method, its feature exists
In comprehensive identification breakthrough three-dimensional coordinate and leak path, are divided into following two considerations described in step 6：
(1) if radon activity variable region grid appears in freshwater surrounding and enters drainage gate gate in step 4, embankment contacts
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,
Then there is breakthrough in bottom corresponding to the radon activity variable region grid, judge seepage road with reference to each water sample radon activity spatial variations
Footpath, if seawater invasion and underground water seepage are present simultaneously, 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).
3. it is according to claim 1 based on radon isotope it is coastal enter drainage gate facility leakage detection method, its feature exists
In measuring point grid is the class square net that the length of side is 0.5-2m in the step 1.
4. it is according to claim 1 based on radon isotope it is coastal enter drainage gate facility leakage detection method, its feature exists
In the depth that each measuring point grid reclaimed water body is gathered in the step 2 is 0.3-0.5m, and collection water sample specification is 250ml.
5. it is according to claim 1 based on radon isotope it is coastal enter drainage gate facility leakage detection method, its feature exists
In the instrument that radon activity is determined in the step 3 is RAD7 and RADH20 water accessories.
6. it is according to claim 1 based on radon isotope it is coastal enter drainage gate facility leakage detection method, its feature exists
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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| CN201710858831.6A CN107478392B (en) | 2017-09-21 | 2017-09-21 | It is coastal into drainage gate facility leakage detection method based on radon isotope |
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| CN201710858831.6A CN107478392B (en) | 2017-09-21 | 2017-09-21 | It is coastal into drainage gate facility leakage detection method based on radon isotope |
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| CN107478392A true CN107478392A (en) | 2017-12-15 |
| CN107478392B CN107478392B (en) | 2018-04-20 |
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| DE3731072C1 (en) * | 1987-09-16 | 1988-09-22 | Willibald Luber | Device for the non-destructive determination of damage to seals of bridges, tubs and flat roofs |
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2017
- 2017-09-21 CN CN201710858831.6A patent/CN107478392B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| DE3731072C1 (en) * | 1987-09-16 | 1988-09-22 | Willibald Luber | Device for the non-destructive determination of damage to seals of bridges, tubs and flat roofs |
| CN102435398A (en) * | 2011-09-07 | 2012-05-02 | 中核华誉工程有限责任公司 | Test unit of cavity sluice gate of nuclear power station reactor |
| CN103558646A (en) * | 2013-10-31 | 2014-02-05 | 中国矿业大学 | Method of detecting dynamic developmental situation of overburden mining-induce fissure in radon gas earth surface |
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| CN206348121U (en) * | 2016-12-26 | 2017-07-21 | 上海岩土工程勘察设计研究院有限公司 | Survey line and gaging hole arrangement for large-scale draining pipe culvert leak detection |
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| 郭红永等: "用氡-222评价蒲石河抽水蓄能电站的地下厂房渗漏水来源", 《水力发电》 * |
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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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Granted publication date: 20180420 |