CN103308258A - Method for detecting leakage passage position of dam by using cold source method - Google Patents
Method for detecting leakage passage position of dam by using cold source method Download PDFInfo
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- CN103308258A CN103308258A CN2013101457645A CN201310145764A CN103308258A CN 103308258 A CN103308258 A CN 103308258A CN 2013101457645 A CN2013101457645 A CN 2013101457645A CN 201310145764 A CN201310145764 A CN 201310145764A CN 103308258 A CN103308258 A CN 103308258A
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Abstract
The invention discloses a method for detecting a leakage passage position of a dam by using a cold source method. The method comprises the steps of measuring temperature data of each drilled hole along the hole depth of a target region of a dam region in an initial state; uniformly putting an equal amount of frozen brine at the position corresponding to each depth in each drilled hole by using an injector; after standing for 5 min, periodically measuring the temperature value of each drilled hole along the hole depth; drawing an isothermal diagram of each depth of the target region according to the measured temperature data of the drilled hole, wherein the region with abnormal temperature, which is a low-temperature region, is a possible leakage passage position; and meanwhile, drawing a curve graph for the variation of the temperature values of underground water of each drilled hole at different moments with depth, wherein the amplitude of variation of the temperature value corresponding to a certain depth is the maximum, the position corresponding to the temperature value is the possible leakage passage position, and thereby the leakage passage position is comprehensively judged. The detection method has the advantages of easiness in operation, high efficiency, low detection cost, integration of two leakage passage position judgment methods, reliable detection result and capability of not affecting the normal operation of a project, and is a nondestructive measurement method.
Description
Technical field
The present invention relates to a kind of method of detecting position of dam leakage passage, belong to the Hydraulic and Hydro-Power Engineering technical field.
Background technology
Seepage is very harmful to the destruction of dykes and dams such as earth and rockfill dam, and it is many that quantity takes place for it, has a very wide distribution, and easily causes dangerous situation such as great dam break.Monitoring of leakage then always is the important step of dam construction construction, to great disasters such as reducing dam break, breach a dyke play a part can not be ignored.
Existing monitoring of leakage technology has method such as " seismic event " geophysical survey, tracer method and temperature trace method etc.Traditional geophysical survey method is surveyed dam leakage passage cost height, and detection accuracy is low; Though the tracer method detection accuracy is higher, and is seriously polluted, the use to radioelement both at home and abroad also has many restrictions; And spike detection in temperature field is simple and easy to do, and detection accuracy height, pollution-free, and effect is obvious.
As everyone knows, because the earth is a hot-bulb, the temperature in the stratum increases with the degree of depth, and in earth's crust shallow-layer limestone formation district, the temperature on the every increase of general degree of depth 100m stratum increases by 3.Because water 4 o'clock density maximum, so when the temperature of storehouse water all was higher than 4, the water that temperature is low sank greatly because of density, causes near the water temperature in bottom of the reservior minimum.If existing, reservoir dam, the dam foundation or dam abutment concentrate leak path, leak path and will form a low temperature field on every side, and the center of low temperature field correspondence is exactly the center of leak path.
In view of this, different with the higher temperatures on stratum based on the low-temperature characteristics of storehouse, deep water under the natural situation, forefathers utilize the temperature of water in the boring to judge the Temperature Distribution situation of dam body, according to the temperature anomaly point of Ba Qu, judge the position of leak path.Though this temperature spike detection method is pollution-free, method of operating is simple, precision is also higher; But for the large-scale dam body under the complex engineering geologic condition, the temperature value of monitoring Ba Qu all borings, workload is huge, sometimes even need bore new hole in addition, time and effort consuming more then.
The present invention's " low-temperature receiver method " detecting position of dam leakage passage utilizes existing boring, by initiatively applying low temperature cold source, has improved monitoring efficient greatly.Simultaneously in conjunction with the criterion of traditional " temperature anomaly point ", significantly increase detection accuracy again, weakened the influence of long term monitoring work to the dykes and dams construction, had advantages such as efficient height, cost are low, pollution-free.
Summary of the invention
Goal of the invention:
The purpose of this invention is to provide a kind of simple to operate, efficient is high, the detection method of the reliable dam leakage of result of detection position.
Technical scheme:
A kind of " low-temperature receiver method " detecting position of dam leakage passage may further comprise the steps:
(1) utilizing the high-precision temperature detection instrument to measure under the original state of Ba Qu target area respectively holes along the temperature data of hole depth;
(2) utilize throwing source device evenly to throw in the chilled brine of equivalent to the position of interior each degree of depth correspondence of each boring, leave standstill 5min;
(3) utilize each boring of high-precision temperature detection instrument periodic measurement along the temperature value of hole depth;
(4) according to the temperature data of each boring of the same time period that records along hole depth, in conjunction with the natural coordinate of each boring, utilize the isothermal map of each degree of depth of numerical software render target zone, the temperature anomaly district is that low-temperature space then is possible leak path position;
(5) according to the temperature data of each boring before and after the above-mentioned input ice cube that records, draw the different underground water temperature values constantly of each boring with the curve map of change in depth, possible leak path position is judged and the location;
(6) comprehensive step (4), (5) are found out the position of the criterion of the leak path position that meets step (4), (5) simultaneously to the analysis of possible leak path position, are accurate leak path position, Ba Qu target area.
The different underground water temperature values constantly of described boring are with the curve map of change in depth, the temperature value amplitude of variation maximum of certain degree of depth correspondence, and its corresponding position then is possible leak path position.
This method principle is clear and definite, is particularly useful for the large-scale dam body under the complex engineering geologic condition.In conjunction with factual survey and the daily hydrologic monitoring data to existing all drilled hole, possible leak path position is carried out empirically just declaring, reasonable definite position of wanting the target borehole of actual detection, survey by the temperature to boring then, the temperature anomaly point is found in the natural temperature field of acquisition problem Ba Qu; Obtain holing different underground water temperature values constantly with the curve map of change in depth by initiatively applying low temperature cold source in the boring again, accordingly analysis-by-synthesis and judge the leak path position of dykes and dams.
Beneficial effect:The detection method of dam leakage provided by the invention position is simple to operate, efficient is high, it is low to detect cost, the method for discrimination of comprehensive two kinds of leak path positions, and testing result is reliable, does not influence the normal operation of engineering simultaneously, is a kind of harmless measuring method.
Description of drawings
Fig. 1 is the process flow diagram of detection method of the present invention.
Fig. 2 is that the preceding hole depth in region measurement throwing source (applying low temperature cold source), zone, embodiment dam is the isothermal map of 14m.
Fig. 3 is that the underground water temperature values in the different moment before and after the boring 4 throwing sources, region measurement zone, embodiment dam are with the curve map of change in depth.
Embodiment
Below in conjunction with accompanying drawing the detection method of the present invention's " low-temperature receiver method " detecting position of dam leakage passage is made and to further specify.
The detection method of " low-temperature receiver method " detecting position of dam leakage passage may further comprise the steps:
(1) inspection of the scene of a crime, verify the complex engineering geological hydrology condition of Ba Qu, in conjunction with factual survey and the daily hydrologic monitoring data to existing all drilled hole, possible leak path position is carried out empirically just declaring, rationally determine to want the position of boring of the target area of actual detection;
(2) utilize the high-precision temperature detection instrument to measure under the original state and respectively hole along the temperature data of hole depth, depth interval is typically chosen in 1 meter;
(3) utilizing device corresponding position of stratum in the boring water body in throwing source to throw in a certain amount of tracer agent is chilled brine, when drilling depth is not dark, can puts in order the hole and once throw in tracer agent;
(4) stir throwing source device, tracer agent is mixed within the specific limits, leave standstill 5min;
(5) successively by 5min, 20min behind the throwing source, 40min, 1 hour, 2 hours etc. constantly, utilize the high-precision temperature detection instrument to measure each boring along the temperature value of hole depth, generally can adjust the time interval according to field condition;
(6) according to the temperature data of each boring of the same time period that records along hole depth, in conjunction with the natural coordinate of each boring, utilize the isothermal map of each degree of depth of numerical software render target zone, the temperature anomaly district is that low-temperature space then is possible leak path position;
(7) according to each temperature data of holing before and after the above-mentioned input ice cube that records, draw the different underground water temperature values constantly of each boring with the curve map of change in depth, the temperature value amplitude of variation maximum of certain degree of depth correspondence, its corresponding position then are possible leak path position;
(8) comprehensive step (6), (7) are found out the position of the criterion of the leak path position that meets step (6), (7) simultaneously to the analysis of possible leak path position, are accurate leak path position, Ba Qu target area.
Utilize said method that certain reservoir rock leak path position is surveyed, the results are shown in Figure 2 and Fig. 3.Fig. 2 is the isothermal map of 14m for the preceding hole depth in dam region measurement throwing source (applying low temperature cold source), zone, and Fig. 3 is that the different underground water temperature values constantly in front and back, boring 4 throwing sources, region measurement zone, dam are with the curve map of change in depth.
As shown in Figure 2, the darker regions centered by coordinate (4.6,5.8) position, there is tangible temperature anomaly, namely holing 4 has significantly low warm spot in the position of the 14m degree of depth, according to the described principle of step (4), the positions that boring 4 is positioned at the 14m degree of depth then are possible leak path position.As shown in Figure 3, boring 4 is applying the low temperature cold source front and back, the temperature value amplitude of variation maximum of 14m degree of depth correspondence, according to the described principle of step (5), the analysis conclusion of synthesizing map 2, can judge accurately then and the position of leak path behind this reservoir face dam dam is located in the location that the position of the 4 hole depth 14m that namely hole is the accurate position of the leak path of seeking.
Claims (1)
1. " low-temperature receiver method " detecting position of dam leakage passage is characterized in that, may further comprise the steps:
(1) utilizing the high-precision temperature detection instrument to measure under the original state of Ba Qu target area respectively holes along the temperature data of hole depth;
(2) utilize throwing source device evenly to throw in the chilled brine of equivalent to the position of interior each degree of depth correspondence of each boring, leave standstill 5min;
(3) utilize each boring of high-precision temperature detection instrument periodic measurement along the temperature value of hole depth;
(4) according to the temperature data of each boring of the same time period that records along hole depth, in conjunction with the natural coordinate of each boring, utilize the isothermal map of each degree of depth of numerical software render target zone, the temperature anomaly district is that low-temperature space then is possible leak path position;
(5) according to each temperature data of holing before and after the above-mentioned input ice cube that records, draw the different underground water temperature values constantly of each boring with the curve map of change in depth, the temperature value amplitude of variation maximum of certain degree of depth correspondence, its corresponding position then are possible leak path position;
(6) comprehensive step (4), (5) are found out the position of the criterion of the leak path position that meets step (4), (5) simultaneously to the analysis of possible leak path position, are accurate leak path position, Ba Qu target area.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706216A (en) * | 2016-12-12 | 2017-05-24 | 清华大学 | Non-contact detection method for leakage of gas with temperature higher than environment temperature |
| CN107490455A (en) * | 2017-09-13 | 2017-12-19 | 长江勘测规划设计研究有限责任公司 | Earth and rockfill dam seepage real-time monitoring device and monitoring method based on warming imaging |
| CN109238646A (en) * | 2018-10-23 | 2019-01-18 | 汤十力 | Method and apparatus according to suspension ball motion morphology tracing and positioning leakage passage entrance |
| CN112254764A (en) * | 2020-10-16 | 2021-01-22 | 湖南工程学院 | System and method for rapidly positioning and monitoring dam leakage channel |
| RU2751853C1 (en) * | 2020-12-21 | 2021-07-19 | Публичное акционерное общество "Федеральная гидрогенерирующая компания - РусГидро" (ПАО "Рус-Гидро") | Method for identifying the location of the source and filtration paths on a ground hydrotechnical structure |
| CN114526870A (en) * | 2022-02-22 | 2022-05-24 | 江西省水利科学院 | Nondestructive detection device and detection method for dam cut-off wall |
| CN115629089A (en) * | 2022-11-11 | 2023-01-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and equipment for accurately positioning seepage of dam abutment of earth-rock dam and performing targeted repair |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706216A (en) * | 2016-12-12 | 2017-05-24 | 清华大学 | Non-contact detection method for leakage of gas with temperature higher than environment temperature |
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| CN107490455A (en) * | 2017-09-13 | 2017-12-19 | 长江勘测规划设计研究有限责任公司 | Earth and rockfill dam seepage real-time monitoring device and monitoring method based on warming imaging |
| CN109238646A (en) * | 2018-10-23 | 2019-01-18 | 汤十力 | Method and apparatus according to suspension ball motion morphology tracing and positioning leakage passage entrance |
| CN112254764A (en) * | 2020-10-16 | 2021-01-22 | 湖南工程学院 | System and method for rapidly positioning and monitoring dam leakage channel |
| CN112254764B (en) * | 2020-10-16 | 2022-04-19 | 湖南工程学院 | System and method for rapidly positioning and monitoring dam leakage channel |
| RU2751853C1 (en) * | 2020-12-21 | 2021-07-19 | Публичное акционерное общество "Федеральная гидрогенерирующая компания - РусГидро" (ПАО "Рус-Гидро") | Method for identifying the location of the source and filtration paths on a ground hydrotechnical structure |
| CN114526870A (en) * | 2022-02-22 | 2022-05-24 | 江西省水利科学院 | Nondestructive detection device and detection method for dam cut-off wall |
| CN115629089A (en) * | 2022-11-11 | 2023-01-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and equipment for accurately positioning seepage of dam abutment of earth-rock dam and performing targeted repair |
| CN115629089B (en) * | 2022-11-11 | 2023-05-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and equipment for accurately positioning and targeted repairing leakage of dam abutment of earth-rock dam |
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Application publication date: 20130918 |