CN109029337A - A kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM and monitoring method - Google Patents
A kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM and monitoring method Download PDFInfo
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- CN109029337A CN109029337A CN201810828260.6A CN201810828260A CN109029337A CN 109029337 A CN109029337 A CN 109029337A CN 201810828260 A CN201810828260 A CN 201810828260A CN 109029337 A CN109029337 A CN 109029337A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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Abstract
The invention discloses a kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM and monitoring methods, including monitoring criteria, flexible displacement meter, pillar, data acquisition device, monitoring criteria are arranged in the metastable impervious body pedestal/basement rock in earth and rockfill dam impervious body bottom end, flexible displacement meter bottom is fixed in monitoring criteria, pillar is cased on the outside of flexible displacement meters more than monitoring criteria, pillar is continuously bonded or close to being placed in impervious body downstream face, make the deformation synchronous with impervious body of flexible displacement meter, flexible displacement meter top is connected on the data acquisition device that dam crest is arranged in.The present invention fundamentally solves the problems, such as that the monitoring data representativeness of earth and rockfill dam impervious body deformation routine monitoring method is poor, precision is low, compared with routine monitoring method, Embedded installation is quality controllable, observation workload is small, high degree of automation, and realizes impervious body 3 d deformation monitoring.
Description
Technical field
The present invention relates to monitoring of hydraulic engineering field more particularly to a kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM and
Monitoring method.
Background technique
Earth and rockfill dam impervious body plays water blocking antiseep, and impervious body deforms excessive or deformation, impervious body can be made to produce
Raw harmfulness crack leads to seepage prevention system defect, to generate seepage abnormality, will cause seepage flow accident when serious；Ministry of Water Resources was once
More of whole nation large reservoir accident is arranged, discovery seepage flow accident accounts for 31.7%, therefore impervious body deformation is important monitoring item
Mesh.Impervious body deformation is substantially carried out Deflection deformation inspection, when impervious body is the flexible materials core-walls such as soil property or bituminous concrete,
It also will do it compressive deformation monitoring.
For impervious body Deflection deformation inspection, inclinometer pipe is buried usually near impervious body, using movable type inclinometer people
Work observation or built-in stationary slope level automatic Observation, this monitoring method have following defect: 1. survey line is represented far from impervious body
Property is poor.Since impervious body surface is not generally plane, and impervious body in principle cannot be occupied and penetrates, and inclinometer pipe is usual
It can not be bent, survey line is approximately straight line, therefore inclinometer pipe is difficult to be bonded impervious body, and survey line is representative poor.2. surveying
Inclined tube guide groove is stringent towards requiring, and embedded quality is difficult to ensure.For obtain panel deflection deformation, need to make inclinometer pipe guide groove line with
Deflection deformation direction is consistent, otherwise can bring measurement error, and this point is not easily achieved during earth and rockfill dam roller compaction construction, and
Inclinometer pipe longer guide groove torsion possibility is bigger, is influenced also bigger, measurement error amendment trouble by reversing when observation.3. artificial
Observation process is cumbersome, heavy workload.Relatively multi-measuring point can be set in artificial observation, reduces sag curve error of fitting, but
Measuring point quantity is directly proportional to workload, and often in hours, and observation process is cumbersome, inefficient.4. fixing inclinometer in pipe certainly
When in-motion viewing is surveyed, measuring point limited amount, observing buoy error is larger, and complex installation process, risk are larger.Every fixed survey in pipe
Oblique instrument needs to draw a cable, manages interior narrow space and limits measuring point quantity, general measuring point spacing is 5~10m, sag curve
Upper data are discontinuous, connected between inclinometer by flexible member, and the sag curve between two o'clock is generated by fitting, error compared with
Greatly；The mechanical fastener quantity for needing to assemble in inclinometer installation process is more, once falling into hole in installation process, is then difficult to
It salvages and becomes useless hole.5. can not achieve three-dimensional automatic monitoring.Inclinometer pipe can only carry out the deformation monitoring of its vertical axis direction,
To monitor axial deformation, then housing detection punctuate is needed such as to settle magnet ring, it can only be using movable type inclinometer and movable heavy
Instrument artificial measurement respectively is dropped, if survey line is smaller with horizontal sextant angle, manual measurement mode is also difficult to carry out.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEMs and monitoring side
Method, it is whole succinct, it is not take up, do not weaken antiseepage phosphor bodies, be bonded or disposed close to impervious body, outlet is simple, measuring point on survey line
It is continuously distributed, impervious body deformation can be represented；Quality is easy to control when the monitoring device implements embedded, the data of monitoring method
Acquisition and treatment process are not necessarily to manual intervention, high degree of automation, can obtain represent impervious body deformation, it is high-precision continuous
Deformation curve realizes impervious body 3 d deformation monitoring.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that: a kind of earth and rockfill dam impervious body deformation monitoring
System, including monitoring criteria, flexible displacement meter, pillar, data acquisition device, monitoring criteria are arranged in earth and rockfill dam impervious body bottom end
In metastable impervious body pedestal/basement rock, flexible displacement meter bottom is fixed in monitoring criteria, flexibilities more than monitoring criteria
It is cased with pillar on the outside of displacement meter, pillar is continuously bonded or close to impervious body downstream face is placed in, makes flexible displacement meter and impervious body
Synchronous deformation, flexible displacement meter top is connected on the data acquisition device that dam crest is arranged in.
The effective aperture of drilling or preformed hole in the monitoring criteria, drilling or preformed hole is greater than flexible displacement meter outer diameter,
70~90mm of aperture, effective hole depth are 1~2m, the fixed flexible displacement meter of injection cement mortar in drilling or preformed hole.
The flexibility displacement meter uses array displacement meter or various dimensions deformation measurement sensor.
The flexibility displacement meter measurement end carries a cable, in cable connection to data acquisition device.
The pillar and flexible displacement meter are mating, and pillar internal diameter is greater than flexible displacement meter 2~4mm of outer diameter, pillar be with
Flexible, PE, PVC of inner wall smooth or PPR pipe.
A kind of earth and rockfill dam impervious body deformation monitoring method, comprising the following steps:
(1) in the metastable impervious body pedestal/basement rock internal drilling in earth and rockfill dam impervious body bottom end or preformed hole, by flexible position
It moves meter bottom direct-burried and is fixedly arranged at formation monitoring criteria in hole；
(2) flexible displacement meter more than monitoring criteria, housing pillar are continuously bonded or close to being placed in impervious body downstream face,
It is allowed to deformation synchronous with impervious body；
(3) flexible displacement meter measurement end cable is connected to data acquisition device, by data acquisition device and mating soft
Part obtains impervious body in a manner of wired automatic collection existingly or now wireless automatic collecting or remote automatic acquisition automatically
3 D deformation data are simultaneously handled.
The fitting or close to being placed in impervious body downstream face, it is desirable that be not take up antiseepage phosphor bodies and as close to antiseepage
The placement of body downstream face: it for reinforced concrete face rockfill dam, is bonded panel and is placed in panel base mat layered material surface；For drip
Green concrete face rockfill dam is placed in the shallow slot on panel base mat layered material surface layer close to panel, keep certain safety away from
From avoiding high temperature from damaging flexible displacement meter；For core wall dam, it is bonded core-wall and is placed in core-wall and downstream transition material junction.
The effective aperture of drilling or preformed hole is greater than 70~90mm of flexible displacement meter outer diameter, effective hole in the monitoring criteria
Depth is 1~2m, the fixed flexible displacement meter of injection cement mortar in drilling or preformed hole.
The flexibility displacement meter uses array displacement meter or various dimensions deformation measurement sensor, flexible displacement meter measurement end
A cable is carried, in cable connection to data acquisition device.
The pillar and flexible displacement meter are mating, and pillar internal diameter is greater than flexible displacement meter 2~4mm of outer diameter, pillar be with
Flexible, PE, PVC of inner wall smooth or PPR pipe.
The beneficial effects of the present invention are: survey line can be bonded or dispose close to impervious body, deformation synchronous with impervious body, from root
Solve the problems, such as that routine monitoring means are representative poor in sheet；Flexible displacement meter is continuously distributed on survey line, can obtain continuous
The monitoring data of point essentially eliminate the error of fitting between point, further improve the representative of impervious body deformation curve
Property and precision；When monitoring system implements embedded, towards being easy to control, outlet is simple, and embedded quality is easy to control；The monitoring side
Method high degree of automation, data acquisition and processing (DAP) process are not necessarily to manual intervention, improve observed efficiency, avoid human error；
Realize impervious body 3 d deformation monitoring；It is not take up, do not weaken antiseepage phosphor bodies, seepage channel will not be formed inside impervious body,
Security risk is brought to antiseepage main body.
Detailed description of the invention
Fig. 1 is the panel dam type drawing in side sectional elevation of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM of the present invention.
Fig. 2 is the core-wall dam type drawing in side sectional elevation of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM of the present invention.
In figure, 1 --- impervious body (asphaltic concrete core wall/panel)；2 --- impervious body pedestal/basement rock；3 --- it is flexible
Displacement meter；4 --- pillar；5 --- monitoring criteria；6 --- cable；7 --- data acquisition device；8 --- one area of transition zone；
9 --- 2nd area of transition zone；10 --- upstream enrockment；11 --- downstream enrockment；12 --- blotter；13 --- transition zone；
14 --- main enrockment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, now the present invention is carried out further detailed
It describes in detail bright.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to limit this hair
It is bright.
As shown in Figure 1, 2, earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM of the invention, including monitoring criteria 5, flexible displacement meter
3, pillar 4, data acquisition device 7, monitoring criteria 5 are arranged in the metastable impervious body pedestal/base in earth and rockfill dam impervious body bottom end
In rock 2, flexible 3 bottom of displacement meter is fixed in monitoring criteria 5, is cased with pillar on the outside of flexible displacement meters 3 more than monitoring criteria
4, pillar 4 is continuously bonded or close to 1 downstream face of impervious body is placed in, and makes the deformation synchronous with impervious body 1 of flexible displacement meter 3, flexible
3 top of displacement meter is connected on the data acquisition device 7 that dam crest is arranged in.
The effective aperture of drilling or preformed hole in the monitoring criteria 5, drilling or preformed hole is greater than 3 outer diameter of flexible displacement meter
70~90mm, effective hole depth are 1~2m, the fixed flexible displacement meter 2 of injection cement mortar in drilling or preformed hole.
The flexibility displacement meter 2 uses array displacement meter or various dimensions deformation measurement sensor.
Flexibility 2 measurement end of displacement meter carries a cable 6, and cable 6 is connected on data acquisition device 7.
The pillar 4 and flexible displacement meter 3 are mating, and 4 internal diameter of pillar is greater than 3 2~4mm of outer diameter of flexible displacement meter, and pillar 4 is
With flexible, PE, PVC of inner wall smooth or PPR pipe.
In figure, 12 --- blotter；13 --- transition zone；14 --- main enrockment.
A kind of earth and rockfill dam impervious body deformation monitoring method, comprising the following steps:
(1) in the metastable impervious body pedestal/basement rock internal drilling in earth and rockfill dam impervious body bottom end or preformed hole, by flexible position
It moves meter bottom direct-burried and is fixedly arranged at formation monitoring criteria in hole；
(2) flexible displacement meter more than monitoring criteria, housing pillar are continuously bonded or close to being placed in impervious body downstream face,
It is allowed to deformation synchronous with impervious body；
(3) flexible displacement meter measurement end cable is connected to data acquisition device, by data acquisition device and mating soft
Part obtains impervious body in a manner of wired automatic collection existingly or now wireless automatic collecting or remote automatic acquisition automatically
3 D deformation data are simultaneously handled.
The fitting or close to being placed in impervious body downstream face, it is desirable that be not take up antiseepage phosphor bodies and as close to antiseepage
The placement of body downstream face: it for reinforced concrete face rockfill dam, is bonded panel and is placed in panel base mat layered material surface；For drip
Green concrete face rockfill dam is placed in the shallow slot on panel base mat layered material surface layer close to panel, keep certain safety away from
From avoiding high temperature from damaging flexible displacement meter；For core wall dam, it is bonded core-wall and is placed in core-wall and downstream transition material junction.
Specifically, fitting or close to being placed in impervious body downstream face, it is desirable that be not take up antiseepage phosphor bodies and lean on as far as possible
Nearly impervious body downstream face placement: 1. for reinforced concrete face rockfill dam, after the completion of dam slope blotter rolls, panel is poured
Before building, selects a good opportunity and monitoring criteria are set in toe board or toe slab downstream basement rock, it is outer along monitoring section laying on base mat layered material surface
The flexible displacement meter for covering pillar, pours fitting with panel and is placed in panel bottom surface；2. being needed for bitumen concrete faced rockfill dam
Flexible displacement meter and panel are kept into certain safe distance, high temperature is avoided to damage sensor, is specifically ground in dam slope blotter
It after the completion of pressure, before panel pours, selects a good opportunity and monitoring criteria is set in the basement rock of panel bottom, on panel base mat layered material surface layer along prison
Section excavation shallow slot is surveyed, then the flexible displacement meter of housing pillar is placed in shallow slot bottom depending on field test by groove depth,
Simultaneously manual compaction pours with panel close to panel bottom surface and pacifies to dam standard is filled out backfill maximum particle diameter≤50mm graded broken stone material
It sets；3. fitting core-wall is placed in core-wall and downstream transition material junction for core wall dam.It specifically can be in current layer core-wall and dam body
Before expecting rolling and placement, flexible displacement meter is carried out into protection in the trench and is backfilled, safeguard measure and groove depth are to guarantee to avoid
Roller compaction construction and pitch core-wall high temperature damage sensor；After the completion of current layer rolling and placement, flexible displacement meter is carefully dug out, is pasted
It closes core-wall and disposes flexible displacement meter, and remaining flexible displacement meter is carried out into protection in the trench again and is backfilled, next layer of repetition
A upper layer operation, until dam crest.
Specifically combine example in detail:
As shown in Fig. 2, certain big (2) type Hydropower Project, water retaining structure is rockfill dam with asphalt concrete core, and dam crest is long
219.85m, the wide 15.0m of dam crest, riverbed position maximum height of dam 164.2m, asphaltic concrete core wall maximum height 132.0m, need pair
Asphaltic concrete core wall deformation is monitored.This engineering rock-fill dams core-wall bottom is enlarged structure, conventional inclinometer pipe monitoring mode
It needs vertically to bury other than enlarged structure, so that survey line is apart from 0.5~0.9m of core-wall surface, in addition inclinometer pipe is routinely embedded square
Formula needs to avoid core wall construction mechanical influence, away from 1.5~2m of core-wall bury, due to remote apart from core-wall, inclinometer pipe measure
The only deformation in one area of transition zone, can not represent the deformation of core-wall；In addition survey line is up to 132m, and guide groove installation easily twists
And deformation, inclinometer pipe are buried quality and are difficult to ensure, using inefficiency when artificial observation, if installation stationary slope level carries out certainly
Dynamic monitoring, by interval, 5m is arranged based on 1 measuring point, needs to draw 27 cables, and 16 cables have rule of thumb been drawn in pipe very
It is difficult；In terms of survey line representativeness and expected implementation result, conventional inclinometer pipe monitoring method is not suitable for the engineering core-wall deformation monitoring.
In order to realize the engineering core-wall deformation monitoring, earth and rockfill dam impervious body deformation monitoring device of the present invention and method are used.
The specific implementation process is as follows:
The flexible displacement meter 3 of monitoring device selects array displacement meter, and length is according to the monitoring position bituminous concrete heart
The customization of 1 downstream surface survey line length of wall, an included cable 6 can lead to dam crest monitoring station nearby；Pillar 4 uses internal diameter Φ 27mm
Flexible PVC pipe, pillar do not constrain array displacement meter and slides in pipe.
Monitoring criteria 5 are arranged on the impervious body pedestal 2 of asphaltic concrete core wall bottom, specifically in asphaltic concrete core wall
Vertical hole is bored in the downstream side of bottom enlarged structure on impervious body pedestal after positioning, aperture is Φ 76mm, and effective hole depth is not less than
1.0m uses steel deck-plate closed orifices after the completion of drilling.When asphaltic concrete core wall and one area of downstream transition floor, 8 reclamation level are super
When crossing impervious body pedestal about 0.75m, digs out aperture steel deck-plate and open, micro-expansion cement mortar is filled in hole, it will be without shield
In the 1m array displacement meter tripping in hole of pipe and fixed, after cement mortar consolidation, hole inner segment displacement meter is as the bituminous concrete heart
The monitoring criteria of wall deformation.
The array displacement meter with pillar of the above fitting asphaltic concrete core wall downstream surface placement 50cm long of drilling, and
In asphaltic concrete core wall downstream side, vertically roam all around the would is tested through scene temperature to groove is excavated and uses depth 25cm groove, length
It paves boundary of works area 1m or more beyond paver downstream side lower hopper, remaining array displacement meter band pillar is laid in slot,
And protected using channel steel, so that array displacement meter is not subject to crushing and will not be damaged by asphaltic concrete core wall high temperature.
After carrying out safeguard measure, continue the construction in one area of asphaltic concrete core wall and transition zone.When lifting height reaches
To after 50cm or 100cm (the about integral multiple of array displacement meter single-unit length), array displacement meter is carefully dug out, continues to paste
The array displacement meter with pillar for closing asphaltic concrete core wall downstream surface placement 50cm or 100cm long backfills groove to working as
25cm below preceding reclamation level simultaneously is compacted reach to fill out dam standard, and remaining array displacement meter band pillar is laid in slot, and is adopted
It is protected with channel steel, is then backfilled to current reclamation level.This step is repeated until asphaltic concrete core wall crest level.In figure,
9 --- 2nd area of transition zone；10 --- upstream enrockment；11 --- downstream enrockment.
Array displacement meter is led to monitoring station when dam crest structure is formed to top by dam filing nearby.Data acquisition uses
Array displacement meter is connected directly to installation SAAsuite especially by SAAUSB converter by now wired the automatic data collection mode
The laptop of software, automatic collection core-wall 3 D deformation data are simultaneously handled.In addition it is provided with SAA232 converter, with side
Just engineering monitoring automated system is accessed.
Above-mentioned technical proposal disclosed by the invention has obtained following the utility model has the advantages that solving the high bituminous concrete of the engineering
The deformation monitoring problem of core wall dam core-wall, obtains the high precision monitor data of continuous point, and Monitoring Result representativeness is good；With it is normal
Rule monitoring method compares, and reduces the technical difficulty of Embedded installation, Embedded installation quality is guaranteed；Realize core-wall three-dimensional
Deformation monitoring, and the automatic collection and processing of monitoring data are realized, observation workload is greatly reduced, improves observation effect
Rate avoids artificial observation error.
Embodiment described above is merely to illustrate technical idea and feature of the invention, in the art its object is to make
Technical staff it will be appreciated that the contents of the present invention and implement accordingly, patent model of the invention only cannot be limited with the present embodiment
It encloses, i.e., same changes or modifications made by all disclosed spirit are still fallen in the scope of the patents of the invention.
Claims (10)
1. a kind of earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM, which is characterized in that including monitoring criteria (5), flexible displacement meter (3),
Pillar (4), data acquisition device (7), monitoring criteria (5) are arranged in the metastable impervious body base in earth and rockfill dam impervious body bottom end
In seat/basement rock (2), flexible displacement meter (3) bottom is fixed on monitoring criteria (5), flexible displacement meters (3) more than monitoring criteria
Outside is cased with pillar (4), pillar (4) continuously fitting or close to impervious body (1) downstream face is placed in, make flexible displacement meter (3) with
The synchronous deformation of impervious body (1), flexible displacement meter (3) top is connected on the data acquisition device (7) that dam crest is arranged in.
2. earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM according to claim 1, which is characterized in that on the monitoring criteria (5)
The effective aperture of drilling or preformed hole, drilling or preformed hole is greater than flexible displacement meter (3) outer diameter, 70~90mm of aperture, effective hole
Depth is 1~2m, the fixed flexible displacement meter (2) of injection cement mortar in drilling or preformed hole.
3. earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM according to claim 1, which is characterized in that the flexibility displacement meter (2)
Using array displacement meter or various dimensions deformation measurement sensor.
4. earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM according to claim 1, which is characterized in that the flexibility displacement meter (3)
Measurement end carries a cable (6), and cable (6) is connected on data acquisition device (7).
5. earth and rockfill dam impervious body DEFORMATION MONITORING SYSTEM according to claim 1, which is characterized in that the pillar (4) and flexibility
Displacement meter (3) is mating, and pillar (4) internal diameter is greater than flexibility displacement meter (3) 2~4mm of outer diameter, and pillar (4) is with flexible, inner wall light
Sliding PE, PVC or PPR pipe.
6. a kind of earth and rockfill dam impervious body deformation monitoring method, which comprises the following steps:
(1) in the metastable impervious body pedestal/basement rock internal drilling in earth and rockfill dam impervious body bottom end or preformed hole, by flexible displacement meter
Bottom direct-burried is fixedly arranged at formation monitoring criteria in hole；
(2) flexible displacement meter more than monitoring criteria, housing pillar are continuously bonded or close to impervious body downstream face is placed in, are allowed to
Deformation synchronous with impervious body；
(3) flexible displacement meter measurement end cable is connected to data acquisition device, by data acquisition device and software kit, with
Now wired automatic collection or now wireless automatic collecting or the mode of remote automatic acquisition, the automatic impervious body three-dimensional that obtains become
Graphic data is simultaneously handled.
7. earth and rockfill dam impervious body deformation monitoring method according to claim 6, which is characterized in that the fitting or close to placement
In impervious body downstream face, it is desirable that be not take up antiseepage phosphor bodies and disposed as close to impervious body downstream face: for reinforced concrete
Native rock, fitting panel are placed in panel base mat layered material surface；For bitumen concrete faced rockfill dam, close to face
Plate is placed in the shallow slot on panel base mat layered material surface layer, keeps certain safe distance that high temperature is avoided to damage flexible displacement meter；
For core wall dam, it is bonded core-wall and is placed in core-wall and downstream transition material junction.
8. earth and rockfill dam impervious body deformation monitoring method according to claim 6, which is characterized in that drill in the monitoring criteria
Or the effective aperture of preformed hole is greater than 70~90mm of flexible displacement meter outer diameter, effective hole depth is 1~2m, is infused in drilling or preformed hole
Enter the fixed flexible displacement meter of cement mortar.
9. earth and rockfill dam impervious body deformation monitoring method according to claim 6, which is characterized in that the flexibility displacement meter uses
Array displacement meter or various dimensions deformation measurement sensor, flexible displacement meter measurement end carry a cable, cable connection to number
According on acquisition device.
10. earth and rockfill dam impervious body deformation monitoring method according to claim 6, which is characterized in that the pillar and flexible position
It is mating to move meter, pillar internal diameter is greater than flexible displacement meter 2~4mm of outer diameter, pillar be with flexible, inner wall smooth PE, PVC or
PPR pipe.
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Cited By (2)
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| CN111678474A (en) * | 2020-06-04 | 2020-09-18 | 赵德才 | Arch bridge owner encircles continuous displacement monitoring devices |
| CN113405931A (en) * | 2020-12-18 | 2021-09-17 | 长江勘测规划设计研究有限责任公司 | Measuring device and method for dynamically monitoring scouring process of weir plug body drainage groove |
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