CN105973533B - Leakage continuous monitoring experimental provision and method under special formation environmental condition - Google Patents
Leakage continuous monitoring experimental provision and method under special formation environmental condition Download PDFInfo
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- CN105973533B CN105973533B CN201610547597.0A CN201610547597A CN105973533B CN 105973533 B CN105973533 B CN 105973533B CN 201610547597 A CN201610547597 A CN 201610547597A CN 105973533 B CN105973533 B CN 105973533B
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Abstract
The invention discloses the leakage continuous monitoring experimental provision and method under a kind of special formation environmental condition, early period is investigated by engineering site and obtains soil properties parameter, soil layer sample preparation is carried out in the experimental provision, the dyke model in dyke building area is built using the experimental provision, then by adjusting water level elevation, water temperature, the parameters such as temperature, continuous monitoring of leakage process is realized using distributed fiberoptic sensor, experiment terminates to obtain the relation between parameters and the percolating threshold of setting, data foundation can be provided for the monitoring of leakage of different dyke buildings, realize the effective monitoring of different dyke buildings and timely early warning.
Description
Technical field
The present invention relates to the leakage continuous monitoring experimental provision and method under a kind of special formation environmental condition, belong to water conservancy
Technical field of hydropower engineering.
Background technology
Dyke is that defending flood is spread unchecked, and protects the major measure of resident and industrial and agricultural production.Since most of dykes are along day
Right riverbank is built, and the Seepage problems on generally existing dyke basis, seepage failure is one of main damage form in river levee,
Osmotic control measure must be taken to be controlled by.The dyke of different regions, it is multinomial by geological conditions, environment temperature, rainfall etc.
The influence of factor, seepage flow condition are different, and mechanism, process and the result of seepage failure also differ, and therefore, dyke building must be into
Row monitoring of leakage, to reduce seepage failure by effective osmotic control measure, protects Seawall safety.
Existing monitoring of leakage method is typical section monitoring method, this method be in typical section bury some osmometers into
Row osmotic pressure measures, due to osmometer in spatial distribution there are substantial amounts of monitoring blind area, thus monitoring result and imperfect, accurate
Really, it is difficult to play the role of effective monitoring, timely early warning.
In recent years, distributed optical fiber sensing technology is quickly grown in dam safety monitoring field, and the technology is with space point
Resolution is high, monitoring blind spot is there's almost no along fiber deployment, fiber optic materials are not easy by electromagnetic interference, monitoring space length is long,
The simple in structure, advantage such as customization is convenient, validity, maintenance cost be low reliably and with long-term, can realize time, continuous survey spatially
Amount, particularly suitable for carrying out leakage continuous monitoring.
The content of the invention
In view of the foregoing, it is an object of the invention to provide the leakage continuous monitoring under a kind of special formation environmental condition
Experimental provision and method, the experimental provision can simulate dyke geology, environmental condition, be oozed using distributed fiberoptic sensor
Continuous monitoring is leaked, foundation is provided for the monitoring of leakage of dyke building, realizes the effective monitoring of dyke building and timely early warning.
To achieve the above object, the present invention uses following technical scheme：
A kind of leakage continuous monitoring experimental provision under special formation environmental condition, including groove body, gear is set in the groove body
Water partition plate and the first space and second space will be divided into groove body,
Pervious bed 42 is equipped with the second space, pressure sensor is laid with the pervious bed 42, on the pervious bed 42
Impermeable stratum is equipped with, distributed fiberoptic sensor and temperature sensor are laid with the impermeable stratum,
Pervious bed 41 is equipped with first space, water is injected on the pervious bed 41, water can be by pervious bed 41, the pervious bed
42 penetrate into the impermeable stratum.
The pervious bed 41, pervious bed 42, the infiltration coefficient of impermeable stratum and thickness are examined according to dyke building scene soil sample
Result is surveyed to determine.
The water retaining separater is connected with the groove body bottom by strainer.
The water retaining separater horizontally extends gear foot in the position that the pervious bed 42 and impermeable stratum have a common boundary.
The groove body side wall of the second space is equipped with valve.
The groove body is mutually bonded using bonding agent by some pieces of organic glasses and formed, the distributed fiberoptic sensor in
Blocked at the outlet hole of the groove body using epoxy resin.
The method that leakage continuous monitoring experiment is carried out based on above-mentioned leakage continuous monitoring experimental provision, including：
S1：Dyke building field research, obtains soil properties parameter,
The soil properties parameter includes the pervious bed 41, pervious bed 42, the infiltration coefficient and thickness of impermeable stratum；
S2：Using the soil properties parameter of acquisition, research vehicle device is made,
Manufacturing process using the soil properties parameter, arranged in experimental provision the pervious bed 41, pervious bed 42,
Impermeable stratum, while the pressure sensor is laid in the pervious bed 42, the temperature is laid in the impermeable stratum
Sensor, distributed fiberoptic sensor；
S3：Into research vehicle device plus water causes pervious bed 41, the soil sample of pervious bed 42 to reach saturation state,
S4：Seepage failure experiment is carried out,
The water level elevation injected to first space, water temperature are adjusted, when the thermometric knot of the distributed fiberoptic sensor
When fruit reaches a default percolating threshold, judge to leak.
Further include：
S5：When leaking, record and analyze water level elevation, water temperature, the temperature of impermeable stratum, the pore water pressure of pervious bed
The relation of force parameter and the percolating threshold of setting.
The method that leakage continuous monitoring experiment is carried out based on above-mentioned leakage continuous monitoring experimental provision, including：
S1：Dyke building field research, obtains soil properties parameter,
The soil properties parameter includes the pervious bed 41, pervious bed 42, the infiltration coefficient and thickness of impermeable stratum；
S2：Using the soil properties parameter of acquisition, research vehicle device is made,
Manufacturing process using the soil properties parameter, arranged in experimental provision the pervious bed 41, pervious bed 42,
Impermeable stratum, while the pressure sensor is laid in the pervious bed 42, the temperature is laid in the impermeable stratum
Sensor, distributed fiberoptic sensor；
S3：Into research vehicle device plus water causes pervious bed 41, the soil sample of pervious bed 42 to reach saturation state,
S4`：The research vehicle device after water will be added to be positioned in fast freeze-thaw test case, carry out frozen process experiment,
S5`：After frozen process experiment, research vehicle device is placed under room temperature environment,
S6`：Seepage failure experiment is carried out,
The water level elevation injected to first space, water temperature are adjusted, when the thermometric knot of the distributed fiberoptic sensor
When fruit reaches a default percolating threshold, judge to leak.
Further include：
S7`：When leaking, record and analyze water level elevation, water temperature, the temperature of impermeable stratum, the pore water of pervious bed
Pressure, freezing-thawing cycles parameter and the relation of the percolating threshold of setting.
It is an advantage of the invention that：
Leakage continuous monitoring experimental provision under the special formation environmental condition of the present invention, can simulate different dyke buildings
Dyke geology, environmental condition, carry out leakage continuous monitoring using distributed fiberoptic sensor, obtain multinomial physical parameter with oozing
The relation of threshold value is leaked, provides data foundation for the monitoring of leakage of different dyke buildings, and then realize the effective of different dyke buildings
Monitoring and timely early warning.
Brief description of the drawings
Fig. 1 is the device of the invention structure diagram.
Fig. 2 is the device of the invention structure top view.
Fig. 3 is the method flow schematic diagram that the device of the invention carries out leakage continuous monitoring experiment.
Fig. 4 is the method flow schematic diagram that the device of the invention carries out cold district leakage continuous monitoring experiment.
Embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
As shown in Figure 1, 2, the leakage continuous monitoring experimental provision under special formation environmental condition disclosed by the invention, including
Groove body 1, water retaining separater 2 is set in groove body 1 and the first space 100 and second space 200 will be divided into groove body 1,；
First space, 100 bottom is equipped with pervious bed 41, injects water 9 on pervious bed 41, upper water is formed, by adjusting
Swimming position so that seepage failure occurs in impermeable stratum 5；
200 bottom of second space is equipped with pervious bed 42, and MEMS pressure sensor 8, pervious bed are laid with pervious bed 42
42 tops are equipped with impermeable stratum 5, and optical fiber grating temperature meter 10 is laid with impermeable stratum 5, lays and is distributed in impermeable stratum 5
Formula fibre optical sensor 6, one end connection light end box 11 of distributed fiberoptic sensor 6, other end access DTS optic fiber thermometers 12；
Wherein, pervious bed 41, pervious bed 42, impermeable stratum 5, respective infiltration coefficient and thickness are different, infiltration coefficient and
Thickness is determined according to dyke building scene soil samples and detecting result.
Water retaining separater 2 is connected with 1 bottom of groove body by strainer 3, and strainer 3 is used for the pervious bed for preventing the first space 100
42 earth material of pervious bed of 41 earth materials and second space 200 mutually blends.
To prevent upper water from penetrating into impermeable stratum 5, water retaining separater 2 by the gap between water retaining separater 2 and impermeable stratum 5
In the position that pervious bed 42 and impermeable stratum 5 have a common boundary, horizontally extend gear foot 21 to extend seepage paths, ensure experimentation
In vertically occur to seepage failure in impermeable stratum 5.
To ensure the reliability and watertightness of device, groove body 1 can be mutual using low temperature resistant adhesive by seven pieces of organic glasses
Bonding forms, and distributed fiberoptic sensor 6 is blocked at the outlet hole of groove body 1 using low temperature resistant epoxy resin.
As shown in figure 3, the method that experiment is continuously monitored based on above-mentioned leakage continuous monitoring experimental provision, including step
Suddenly：
S1：Dyke building field research, obtains soil properties parameter
Dyke building field research is carried out, Representative soil sample is obtained to carry out soil samples and detecting, obtains soil properties parameter, obtain
Take the related hydrology in area, meteorology, soil layer data along dyke, obtain local each monthly mean temperature, each mean monthly stage in river,
The data such as each Month average rainfall, according to data from investigation and soil properties parameter, determine the infiltration system of pervious bed and impermeable stratum
The parameter such as number and thickness.
For example, by Geological Investigation of Dike Engineering, Songhuajiang Area is sand base, Double Dyke Foundation, engineering site collection sand base,
The Representative soil sample in the regions such as Double Dyke Foundation, it is close that detection obtains soil sample gradation composition, porosity, specific heat, thermal conductivity factor, the soil body
The soil properties parameters such as degree, particle diameter distribution, moisture content, argillic horizon (i.e. impermeable stratum) thickness, sandy soils (i.e. pervious bed) thickness,
Basic parameter as experiment sample preparation.
S2：According to obtained soil properties parameter, research vehicle device is made
According to obtained soil properties parameter, according to certain soil body particle diameter distribution, soil body density, pervious bed is set respectively
With the thickness and infiltration coefficient of impermeable stratum, according to professional standard (《Standard for test methods of earthworks》) carry out soil sample arrangement；It
Afterwards, pervious bed, impermeable stratum are laid with experimental provision, while sets, connect each instrument, completes the system of research vehicle device
Make.
For example, for Songhuajiang Area, according to data from investigation and the soil properties parameter of measure, in 1 middle berth setting tool of groove body
There are the sandy soils (pervious bed 41, pervious bed 42) and argillic horizon (impermeable stratum 5) of certain infiltration coefficient and thickness, simulation structure pine
The Double Dyke Foundation model in flower river area；
Specifically, in being laid with pervious bed 41, pervious bed 42 with certain infiltration coefficient and thickness in groove body 1, it is laid with tool
There is the impermeable stratum 5 of certain infiltration coefficient and thickness, MEMS pressure sensor 8 is laid in pervious bed 42, occur for measuring
Pore water pressure during seepage failure, lays distributed fiberoptic sensor 6 in impermeable stratum 5, for carrying out monitoring of leakage,
Laying optical fiber grating temperature meter 10 in impermeable stratum 5, for measuring the temperature of impermeable stratum 5, and checks distributing optical fiber sensing
The temperature measurement result of device 6；Then, by the terminals connection light end box 11 of distributed fiberoptic sensor 6, another wiring
Hold (signal output part) connection DTS optic fiber thermometers 12；Afterwards, by 5 surface of impermeable stratum according to related specifications carry out manually or
Mechanical Planarization, upper each instrument of electro-detection whether normal operation；The tap water of certain water level elevation is injected to the top of pervious bed 41, is protected
Hold stable level and continuously measure the reading of each instrument, it is ensured that each instrument can work normally.
S3：After research vehicle device completes, into device plus water causes soil sample saturation
As shown in Figure 1, being provided with valve 7 on the groove body side wall of second space 200, research vehicle device builds completion
Afterwards, add water to reach saturation state up to the soil sample of pervious bed 41,42 into groove body 1, the water surface is not covered not by control valve 7
The interface of pervious bed 5 and pervious bed 42.
S4：Carry out seepage failure experiment
The water that different water level elevations are injected into the first space 100 of groove body 1 carries out permeability test, the coolant-temperature gage of injection compared with
Low (being less than room temperature, such as 5 degree), by the sensing result of distributed fiberoptic sensor 6, judge whether to leak；Specifically
Say, when water at low temperature is not penetrated into impermeable stratum 5, the temperature-measuring results value of the distributed fiberoptic sensor in impermeable stratum 5 is room temperature
Value, during water at low temperature penetrates into pervious bed 5, the temperature-measuring results value of distributed fiberoptic sensor reduces, and sets a percolating threshold,
When the temperature-measuring results value of distributed fiberoptic sensor is equal to less than the percolating threshold, judgement leaks, inside impermeable stratum 5
Generation seepage failure, at this time, records the ginseng such as pore water pressure force value of water level elevation, the temperature value of impermeable stratum 5, pervious bed 42
Number, data foundation is provided for analysis experimental result.
S5：Experiment terminates, and records and analyzes experimental result, and monitoring and early warning foundation are provided for dyke building monitoring of leakage.
In experimentation, record and analyze occur seepage failure when water level elevation, water temperature, the temperature of impermeable stratum, thoroughly
The parameters such as the pore water pressure of water layer and the relation of the percolating threshold of setting, monitoring is provided for the monitoring of leakage of dyke building
With early warning foundation.
As shown in figure 4, the monitoring of leakage for cold district, it is contemplated that the influence of Temperature Factor, it is also necessary in above-mentioned side
Increase frozen process experiment step on the basis of method, be specifically, after above-mentioned steps S1-S3, carry out following experimental procedure：
S4`：The research vehicle device after water will be added integrally to be positioned in fast freeze-thaw test case, carry out frozen process experiment,
Simulate the weather conditions of cold district
Frozen-thawed cycled temperature peak and cycle determine that freezing-thawing cycles for example can be 10 according to data from investigation result
It is secondary, 20 times, 30 times, it is 40 inferior.
S5`：After frozen process experiment, research vehicle device is placed under room temperature environment
S6`：Carry out seepage failure experiment
Treat that the temperature of impermeable stratum 5 returns to room temperature, carry out seepage failure experiment.
The water that different water level elevations are injected into the first space 100 carries out permeability test, and the coolant-temperature gage of injection is relatively low, passes through
The sensing result of distributed fiberoptic sensor 6, judges whether to leak；When the temperature-measuring results value of distributed fiberoptic sensor 6
Equal to less than setting percolating threshold when, by the survey of the temperature-measuring results of optical fiber grating temperature meter 10 and distributed fiberoptic sensor 6
Warm result compares, if identical, measurement result is accurate, and judgement has leaked, and seepage failure occurs for the inside of impermeable stratum 5,
At this time, the ginseng such as water level elevation, the temperature value of impermeable stratum 5, the pore water pressure force value of pervious bed 42, freezing-thawing cycles is recorded
Number, data foundation is provided for analysis experimental result.
S7`：Experiment terminates, and records and analyzes experimental result, and monitoring is provided for the dyke building monitoring of leakage of cold district
With early warning foundation.
In experimentation, record and analyze occur seepage failure when water level elevation, water temperature, the temperature of impermeable stratum, thoroughly
The parameters such as the pore water pressure of water layer, freezing-thawing cycles and the relation of the percolating threshold of setting, are the dike of cold district
Preventing engineering monitoring of leakage provides monitoring and early warning foundation, reaches effective monitoring management and timely early warning.
The present invention special formation environmental condition under leakage continuous monitoring experimental provision and are showed by engineering method, early period
Field investigation obtains soil properties parameter, and soil layer sample preparation is carried out in experimental provision, and dyke building area is built using experimental provision
Dyke model, then by adjusting parameters such as water level elevation, water temperature, temperature, realized using distributed fiberoptic sensor continuous
Monitoring of leakage process, experiment terminate to obtain the relation between parameters and percolating threshold, can be oozing for different dyke buildings
Leakage monitoring provides data foundation, and then realizes the effective monitoring of different dyke buildings and timely early warning.
The above is presently preferred embodiments of the present invention and its technical principle used, for those skilled in the art
For, without departing from the spirit and scope of the present invention, any equivalent change based on the basis of technical solution of the present invention
Change, simple replacement etc. is obvious changes, all fall within the protection scope of the present invention.
Claims (10)
1. the leakage continuous monitoring experimental provision under special formation environmental condition, it is characterised in that including groove body, set in the groove body
Put water retaining separater and the first space and second space will be divided into groove body,
Pervious bed (42) is equipped with the second space, pressure sensor is laid with the pervious bed (42), the pervious bed (42)
On be equipped with impermeable stratum, be laid with distributed fiberoptic sensor and temperature sensor in the impermeable stratum,
Pervious bed (41) is equipped with first space, injects water on the pervious bed (41), water can be by the pervious bed (41), permeable
Layer (42) penetrates into the impermeable stratum；
The water level elevation injected to first space, water temperature are adjusted, when the temperature-measuring results of the distributed fiberoptic sensor reach one
During default percolating threshold, judge to leak.
2. the leakage continuous monitoring experimental provision under special formation environmental condition according to claim 1, it is characterised in that
The pervious bed (41), pervious bed (42), the infiltration coefficient of impermeable stratum and thickness are according to dyke building scene soil samples and detecting knot
Fruit determines.
3. the leakage continuous monitoring experimental provision under special formation environmental condition according to claim 2, it is characterised in that
The water retaining separater is connected with the groove body bottom by strainer.
4. the leakage continuous monitoring experimental provision under special formation environmental condition according to claim 3, it is characterised in that
The water retaining separater horizontally extends gear foot in the position that the pervious bed (42) and impermeable stratum have a common boundary.
5. the leakage continuous monitoring experimental provision under special formation environmental condition according to claim 4, it is characterised in that
The groove body side wall of the second space is equipped with valve.
6. the leakage continuous monitoring experimental provision under special formation environmental condition according to claim 5, it is characterised in that
The groove body is mutually bonded using bonding agent by some pieces of organic glasses and formed, and the distributed fiberoptic sensor is in the groove body
Outlet hole at using epoxy resin block.
7. carry out leakage continuous monitoring experiment based on continuous monitoring experimental provision is leaked described in any one in claim 1-6
Method, it is characterised in that including：
S1：Dyke building field research, obtains soil properties parameter,
The soil properties parameter includes the pervious bed (41), pervious bed (42), the infiltration coefficient and thickness of impermeable stratum；
S2：Using the soil properties parameter of acquisition, research vehicle device is made,
Manufacturing process using the soil properties parameter, arranged in experimental provision the pervious bed (41), pervious bed (42),
Impermeable stratum, while the pressure sensor is laid in the pervious bed (42), the temperature is laid in the impermeable stratum
Spend sensor, distributed fiberoptic sensor；
S3：Into research vehicle device plus water causes pervious bed (41), the soil sample of pervious bed (42) to reach saturation state,
S4：Seepage failure experiment is carried out,
The water level elevation injected to first space, water temperature are adjusted, when the temperature-measuring results of the distributed fiberoptic sensor reach
During to a default percolating threshold, judge to leak.
8. the method for leakage continuous monitoring experiment according to claim 7, it is characterised in that further include：
S5：When leaking, record and analyze water level elevation, the pore water pressure of water temperature, the temperature of impermeable stratum, pervious bed ginseng
The relation of number and the percolating threshold of setting.
9. carry out leakage continuous monitoring experiment based on continuous monitoring experimental provision is leaked described in any one in claim 1-6
Method, it is characterised in that including：
S1：Dyke building field research, obtains soil properties parameter,
The soil properties parameter includes the pervious bed (41), pervious bed (42), the infiltration coefficient and thickness of impermeable stratum；
S2：Using the soil properties parameter of acquisition, research vehicle device is made,
Manufacturing process using the soil properties parameter, arranged in experimental provision the pervious bed (41), pervious bed (42),
Impermeable stratum, while the pressure sensor is laid in the pervious bed (42), the temperature is laid in the impermeable stratum
Spend sensor, distributed fiberoptic sensor；
S3：Into research vehicle device plus water causes pervious bed (41), the soil sample of pervious bed (42) to reach saturation state,
S4`：The research vehicle device after water will be added to be positioned in fast freeze-thaw test case, carry out frozen process experiment,
S5`：After frozen process experiment, research vehicle device is placed under room temperature environment,
S6`：Seepage failure experiment is carried out,
The water level elevation injected to first space, water temperature are adjusted, when the temperature-measuring results of the distributed fiberoptic sensor reach
During to a default percolating threshold, judge to leak.
10. the method for leakage continuous monitoring experiment according to claim 9, it is characterised in that further include：
S7`：When leaking, record and analyze water level elevation, the pore water pressure of water temperature, the temperature of impermeable stratum, pervious bed,
Freezing-thawing cycles parameter and the relation of the percolating threshold of setting.
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| CN107466665B (en) * | 2017-09-26 | 2022-10-25 | 中国水利水电科学研究院 | Sand land water and soil conservation system and method |
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| CN107764483B (en) * | 2017-10-09 | 2019-05-21 | 中国水利水电科学研究院 | Leakage monitoring method and device based on temperature spatial and temporal distributions matrix |
| CN110095396B (en) * | 2019-04-10 | 2021-06-18 | 三峡大学 | Combined monitoring test device and method for abnormal seepage of earth and rockfill dam based on distributed optical fiber temperature measurement |
| CN114894234B (en) * | 2022-03-30 | 2024-02-20 | 泰州学院 | Dam osmotic pressure seepage flow monitoring device for hydraulic engineering |
| CN115728018B (en) * | 2023-01-13 | 2023-05-12 | 中国电建集团北京勘测设计研究院有限公司 | Seepage monitoring device and method |
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