CN204924162U - Inside horizontal displacement monitoring devices of dam - Google Patents
Inside horizontal displacement monitoring devices of dam Download PDFInfo
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- CN204924162U CN204924162U CN201520226772.7U CN201520226772U CN204924162U CN 204924162 U CN204924162 U CN 204924162U CN 201520226772 U CN201520226772 U CN 201520226772U CN 204924162 U CN204924162 U CN 204924162U
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- signal source
- dam
- horizontal displacement
- monitoring
- wire rope
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Abstract
The utility model discloses an inside horizontal displacement monitoring devices of dam. The device is that the monitoring of dam horizontal displacement is carried out to the principle of utilizing the gauss law, promptly through say the pre -buried chemical filling permanent magnet in bottom at monitoring pipe, it extremely forms closed -loop always to get back to S from the N utmost point because of the magnetism sense line of magnet, magnetism is felt the relative density of line and is showed that the magnetic is strong and weak relatively, can be similar to according to the gauss law thinks that the absolute value of a certain specified point magnetic flux is more little big more on the contrary along with the distance of magnet, consequently the concrete position of measurable signal source after gaussmeter and the odometer coupling, the horizontal displacement of indirect measurement dam. The utility model discloses measure accurate, disturb less, the precision is high, permanent magnet ligature in pipeline bottom after the purpose -built chemical material filling can warp with the dam in coordination, reflects truly that the inside of dam warp, be the wire of space welding above pipe inner wall with 3-6 meters and encircle the wire rope that contacts in advance, play protection guide wire rope's effect, the circular steel pipe of the same diameter and the monitoring pipe that the withstand voltage polymer plastic pipe interval of corrosion resistant is constituteed say and reduce the pipeline cost with flange stagnant water sealing connection, the device economy, simple installation have improved the construction progress, reduce cost.
Description
Technical field
The utility model relates to a kind of dam inner horizontal displacement monitor, particularly a kind of for earth and rockfill dam and rock horizontal displacement monitoring device.
Background technology
In the eighties, the geotechnique of China observes Comparision fall behind, and Internal Monitoring Observation for Earth Dams belongs to geotechnique's observation category, and the internal observation equipment of earth and rockfill dam and observation procedure are also incomplete, and the research and production of observation instrument equipment is also relatively backward.External Internal Monitoring Observation for Earth Dams is mainly representative with the U.S., as united states bureau of reclamation recommends the horizontal shift of mechanical tension wire horizontal displacement gauge monitoring dam, it is that dam body horizontal shift is delivered in observation room by wire rope by being strained by gravity drop hammer, and the perpendicular displacement through measuring gravity drop hammer realizes the monitoring of dam body horizontal shift indirectly.At present, using more in external dam horizontal displacement monitoring is the method for tiltmeter deviational survey, and it is by burying inclinometer pipe underground in dam inside, by the changes in pitch conversion horizontal shift of mensuration pipeline.On the basis of Foreign Experience, the dam horizontal displacement monitoring instrument of China and monitoring technology are rapidly developed, particularly Nanjing Hydraulic Research Institute is under the subsidy of national science and technology research project and Ministry of Water Resources's emphasis science and technology item, successively develops electrical horizontal displacement gauge and Rod Horizontal Displacement Gauge.
The method of this kind of dependence stretching type sensor monitoring horizontal shift, when pipeline is oversize, tension wire counterweight will increase greatly, and Linear Creep and measuring error also can increase accordingly.
Particularly at Initial impoundment, because dam deformation is large, possible generating portion indium steel wire fracture causes monitoring instrument not repair and withdraw from service problem.
Some units have attempted additive method, 200410012676.9) and " measuring system of dam body panel deflection or dam body inner horizontal and vertical deformation " (number of patent application: 200410012677.3) disclose method and measuring system that a kind of fiber-optics gyroscope measures panel deflection and dam body inner horizontal and vertical deformation as " dam face slab amount of deflection or dam body internal modification monitoring method and device " thereof (number of patent application:, shown by engineering practice, optical fibre gyro monitoring method still Shortcomings.One be system supposition dolly in the duct uniform motion cannot to realize and the error of calculation is large, two is that the zinc-plated weldless steel tube of employing and joint filling combined bellows cost are high, the ability of cooperative transformation, three is that draw-gear uses a windlass improper, and optical fibre gyro integrated system exists erratic shifts affects accuracy of observation.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, in laboratory and practical engineering project, based on the research of Gauss's Law monitoring earth and rockfill dam horizontal shift---by pre-buried permanent magnet signal source, utilize the strong and weak change in location in the flux sensing device monitor signal source of energising, indirectly realize the monitoring device of dam horizontal displacement.
Dam body inner horizontal displacement monitoring must perceive the displacement that the inner concrete a part of dam body occurs, the displacement meter of such as stretching type is all the distortion being reflected this position by measuring point, the utility model take measuring point as monitoring means, be achieved through the following technical solutions: a kind of dam inner horizontal displacement monitor, mainly comprise signal source, monitoring channel, signal source inductor, special drive apparatus, it is characterized in that the colligation of signal source aluminum steel ensures its Telescopic movable bottom monitoring channel, signal source inductor is measured back and forth at monitoring channel under special drive apparatus drives, utilize the result of relative changing value as dam horizontal displacement of monitor signal source position.
Signal inductor comprises the coupling integration of gaussmeter or Hall element or Magnetic Sensor and odometer, and gaussmeter is used for the weak size of induced signal source strength, and odometer is for recording the position of dolly; Odometer accessible site is on dolly, and also accessible site is on special drive apparatus.
Monitoring operation passage is that the round steel pipe of same diameter is connected with corrosion resistant withstand voltage Polymer Round pipe flange bolt seal.The method of channel arrangement is: be from upstream at design altitude the fine sand material that downstream direction lays one deck 20 ~ 40 cm thick, and upstream establishes mixed earth buttress to seal fixing pipe head; Head is provided with directed pulley, and the wire rope of the upper sufficient length of pulley series winding, often connects a segment pipe, and wire rope is two to be pulled outwardly; Protection filled by channel circumference and top 30 ~ 50 cm range fine sand material, and pipeline uniform force is disperseed.
The dam inner horizontal displacement monitor that the utility model provides, has the following advantages:
1, by coupling odometer, increase positional information, alleviate the strict demand to power-equipment, improve measuring accuracy;
2, the Measurement channel that is connected of galvanized anticorrosive steel pipe and high molecule plastic pipe interval, have finished industrial product, simple installation, reach large increase with dam compatible deformation ability, passage can realize multi-usage;
3, double dynamical traction control method, when dolly is by when entering interior outward, a power windlass forward draws dolly, and another power windlass oppositely receives wire rope; When dolly by interior outward time then contrary, windlass can along de-rotation; This control system makes trolley travelling steady, and wire rope is not wound around non-warping;
4, Gauss counts signal inductor not by the impact of time cumulation drift, and whole control system expense is very low.
Accompanying drawing explanation
Figure 1A is gaussmeter internal circuit configuration figure.
Figure 1B is the schematic diagram that sensor location measured by gaussmeter.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the arrangenent diagram of the utility model in dam.
Fig. 4 is channel bottom structural representation.
Fig. 5 is device workflow diagram.
Fig. 6 A is each device repeated test three groups of result schematic diagrams.
Fig. 6 B is that average result schematic diagram is measured 6 times in interval.
Fig. 6 C is relative displacement result schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
The utility model provides a kind of dam inner horizontal displacement monitor based on Gauss's Law, and flow process as shown in Figure 5, specifically comprises the steps:
The first step: by signal source inductor 1 inner end connecting steel wire ropes 5, outer end connects No. 1 power of special drive apparatus, and top wire rope connects No. 2 power of special drive apparatus, the reliability that checkout facility connects.
Second step: the power switch of opening signal source inductor 1, now Figure 1A circuit is energized, start the switch of special drive apparatus 8, its inverse time is rotated, now dolly setting in motion in passage 12, through the position of pre-buried signal source 2, gaussmeter can measure an electromotive force, as Figure 1B, the odometer in synchronous signal source inductor 1 have recorded corresponding position signalling.
3rd step: when signal source inductor 1 runs to calibration position, has now arrived passage the inside, as Fig. 4 position, has disconnected the gauge tap of special drive apparatus 8, the operation conditions of checkout facility.
4th step: the gauge tap opening special drive apparatus 8, its up time is rotated, now signal source inductor 1 from inside outwards moves, through the position of pre-buried signal source 2, gaussmeter can measure an electromotive force, odometer in synchronous signal source inductor 1 have recorded corresponding position signalling, disconnects gauge tap to exit, subsequently the switch of cut-off signal source inductor 1.
5th step: each duplicate measurements three times, the data file automatically generated by signal source inductor 1 imports in software kit, can calculate the position of monitoring point, and drawing image and saving result document.
Described passage 12 contains 4 ~ 6 meters of anticorrosion withstand voltage high molecule plastic pipes and 4 ~ 6 meters of steel pipes, is referred to as pipe 7, and sealing is established in carrying in the middle of joint flange 6 of pipe 7, connects sealing with high-strength bolt.Every root steel pipe two ends welding lead ring 4, goes here and there wire rope 5 successively from afterbody to head, and last wire rope all adjourns outer end end to end, and plastic tube is welding lead ring 4 not.
Described pipe 7 is from dam 10 upstream face, and first is steel pipe, water-tight at the bottom of pipe, is turned herein, be welded with elasticity railing 13 in fixed pulley 3 front portion by fixed pulley 3 guiding steel wire rope 5, prevents dolly from locating bottom inaccurate bumping against.
Described special drive apparatus 8 is made up of 2 windlasss, and after passage 12 has been buried underground, be fixedly mounted in observation room 11, windlass has 3 gears, and one stops gear, counterclockwise shelves and clockwise gear.
Signal source inductor 1 is the center processor of equipment, and at observation procedure, Instrument Design, Monitoring Data collection stores, and the aspects such as the passage method of operation and existing monitoring instrument exist difference.The performance parameter of signal source inductor 1 obtains mainly through indoor measurement and site test, main performance I. and the inner pre-buried horizontal distortion of dam body measures permanent (glow) signal source; II. external Gauss measurement sensor, what realize instrument keeps in repair renewable performance; III. magnetic-field measurement scope-4gass ~ 4gass, resolution is <2.5mgass; IV. Measurement bandwidth 50HZ; V. supply voltage 3.2 ~ 5.0V; VI. output interface USB; VII. working temperature-25 DEG C ~ 85 DEG C; VIII. Instrument Design considers waterproof requirement, and the classification of waterproof after encapsulation is IP65; Ⅸ. the mode that measurement data takes measurement limit, limit to read, measure after terminating by USB interface direct copying; Ⅹ. system has fault alarm prompt facility; Ⅺ. each monitoring can create data storage file automatically, automatically names; Ⅻ. range ability 0 ~ 6000mm (as requested customizable scope), also affects by other factors in precision 1mm(Practical Project).
After signal source inductor 1 indoor are successfully prepared, carry out practice demonstration by actual panel rockfill dam project.Testing program is as follows: on the section of distance dam crest 38 meters, buries monitoring channel 12 underground, and is provided with 6 monitoring points 2.By special drive apparatus 8, signal source inductor 1 is entered the upstream mouth of pipe by the downstream mouth of pipe during test, finally return far point.The object of this project practice is stability and the reliability of test apparatus 1, finally serves project security monitoring.
After system installs completion, carried out semimonthly monitoring test to dam, each test three groups of data, as Fig. 6 A, monitoring one season, i.e. actual monitoring totally 6 times continuously, as Fig. 6 B.
How measuring results, judge in actual measurement process that accuracy of instrument is a difficult problem, because the definition of error is measurement result deduct measured true value.Before instrument is not imbedded, generally can carry out accurate evaluation measuring accuracy by given displacement; After imbedding dam body, one is that the interference of mainly being constructed is moved, and the monitor signal source position change of miniaturization greatly, for precision measurement, the position of initial alignment can not adopt, two be install after can not carry out tunneling boring monitoring immediately, therefore cannot demarcate initially real-valued come measuring system precision.
Monitoring result containing error how correction, how to evaluate the degree of reliability of monitoring result, this kowtows a difficult problem to be solved, particularly movable monitoring instrument.In this experiment, the repeatability that measuring accuracy Primary Reference is measured, utilizes the repeatability of Evaluation of Uncertainty measurement result.Uncertainty is less, represents that the degree of reliability is higher; Otherwise uncertainty is larger, the degree of reliability is lower.The dispersion degree of measurement is introduced in instrument 1
pass judgment on uncertainty, namely judge the feasible method of Instrument measuring precision.
In formula, X
disfor Bessel Formula calculates dispersion degree, n is duplicate measurements number of times,
for the mean value of n measurement.Maximal value Y is got to all result of calculation
dis=
for the uncertainty of system monitoring, then the uncertainty of the duplicate measurements of this instrument is 5.3 millimeters.
In the daily monitoring of dam, utilize the result of relative changing value Fig. 6 C in conjunction with other observation project, utilize empirical discriminant method, speed relative method and the method for weighting to carry out Evaluation to dam safety.
Claims (5)
1. a dam inner horizontal displacement monitor, mainly comprise signal source (2), monitoring channel (12), signal source inductor (1), special drive apparatus (8), it is characterized in that signal source (2) aluminum steel (9) colligation ensures its Telescopic movable in monitoring channel (12) bottom, signal source inductor (1) is measured back and forth at monitoring channel (12) under special drive apparatus (8) drives, and utilizes the result of relative changing value as dam horizontal displacement of monitor signal source (2) position.
2. dam inner horizontal displacement monitor according to claim 1, it is characterized in that the coupling integration of signal source inductor (1) by gaussmeter or Hall element or Magnetic Sensor and odometer, gaussmeter is used for the weak size of induced signal source strength, and odometer is used for the position of tracer signal source inductor; Odometer accessible site is on signal source inductor, and also accessible site is on special drive apparatus.
3. dam inner horizontal displacement monitor according to claim 1, it is characterized in that monitoring channel (12) is connected with corrosion resistant withstand voltage Polymer Round pipe flange bolt seal by the round steel pipe of same diameter, passage is from upstream at design altitude the fine sand material that downstream direction lays one deck 20 ~ 40 cm thick, and upstream establishes mixed earth buttress to seal fixing pipe head; Head is provided with directed pulley, and the wire rope of the upper sufficient length of pulley series winding, often connects a segment pipe, and wire rope is two to be pulled outwardly; Protection filled by channel circumference and top 30 ~ 50 cm range fine sand material, and pipeline uniform force is disperseed.
4. dam inner horizontal displacement monitor according to claim 1, it is characterized in that special drive apparatus (8) is made up of 2 windlasss, windlass has 3 gears, and one stops gear, counterclockwise shelves and clockwise gear; When signal source inductor is by when entering interior outward, a power windlass forward draws dolly, and another power windlass oppositely receives wire rope; When signal source inductor by interior outward time then contrary, windlass can along de-rotation; This control system makes trolley travelling steady, and wire rope is not wound around non-warping.
5. dam inner horizontal displacement monitor according to claim 1, is characterized in that, by signal source inductor (1) inner end connecting steel wire ropes (5), outer end connects No. 1 power, and top wire rope (5) connects No. 2 power, the reliability that checkout facility connects; The power switch in opening signal source inductor (1), start special drive apparatus switch, the windlass inverse time is rotated, now signal source inductor (1) setting in motion in passage (12), through the position of pre-buried signal source (2), gaussmeter can measure an electromotive force, and the odometer simultaneously in instrument have recorded corresponding position signalling; When trolley travelling is to calibration position, now arrives passage the inside, disconnected power control switch, the operation conditions of checkout facility; Open gauge tap, windlass up time is rotated, now signal source inductor (1) from inside outwards moves, through the position of pre-buried signal source (2), gaussmeter can measure an electromotive force, odometer simultaneously in instrument have recorded corresponding position signalling, disconnects gauge tap, disconnect the switch of instrument subsequently to exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520226772.7U CN204924162U (en) | 2015-04-16 | 2015-04-16 | Inside horizontal displacement monitoring devices of dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520226772.7U CN204924162U (en) | 2015-04-16 | 2015-04-16 | Inside horizontal displacement monitoring devices of dam |
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| Publication Number | Publication Date |
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| CN204924162U true CN204924162U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520226772.7U Expired - Fee Related CN204924162U (en) | 2015-04-16 | 2015-04-16 | Inside horizontal displacement monitoring devices of dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476632A (en) * | 2017-09-07 | 2017-12-15 | 北京城建集团有限责任公司 | The method for controlling flanged plate relative horizontal displacement above and below construction period shock isolating pedestal |
-
2015
- 2015-04-16 CN CN201520226772.7U patent/CN204924162U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476632A (en) * | 2017-09-07 | 2017-12-15 | 北京城建集团有限责任公司 | The method for controlling flanged plate relative horizontal displacement above and below construction period shock isolating pedestal |
| CN107476632B (en) * | 2017-09-07 | 2019-03-29 | 北京城建集团有限责任公司 | The method for controlling construction period shock isolating pedestal or more flanged plate relative horizontal displacement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20170416 |