CN109520471A - Optical fiber single hole deep soil settlement survey device and its monitoring method - Google Patents
Optical fiber single hole deep soil settlement survey device and its monitoring method Download PDFInfo
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- CN109520471A CN109520471A CN201811516638.5A CN201811516638A CN109520471A CN 109520471 A CN109520471 A CN 109520471A CN 201811516638 A CN201811516638 A CN 201811516638A CN 109520471 A CN109520471 A CN 109520471A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
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- Engineering & Computer Science (AREA)
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- Length Measuring Devices By Optical Means (AREA)
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Abstract
The present invention provides a kind of optical fiber single hole deep soil settlement survey devices, belong to Geological Hazards Monitoring field, including multiple Fiber Bragg Grating Sensor Arrays, the demodulated equipment connecting with Fiber Bragg Grating Sensor Array and the data processing module and filled media for joining end to end and being respectively arranged on multiple cylinders in different depth stratum, be respectively arranged on cylinder inner wall；Fiber Bragg Grating Sensor Array includes the multiple fiber-optic grating sensors for being respectively arranged in cylinder and being connected by an optical fiber and being axially distributed along cylinder.Optical fiber single hole deep soil settlement survey apparatus structure provided by the invention is simple, easy for installation, monitoring cost is low.The present invention also provides a kind of optical fiber single hole deep soil settlement survey methods, including bore implant holes, cylinder is implanted into implant holes and corresponds cylinder with each layer of position, make to couple between cylinder and stratum, obtain strain signal and processing strain signal.Optical fiber single hole deep soil settlement survey method provided by the invention can realize the distributed monitoring of single hole different layers position sedimentation.
Description
Technical field
The invention belongs to monitoring technology for geological hazards fields, are to be related to a kind of optical fiber single hole delaminating deposition more specifically
Monitoring device and the optical fiber single hole deep soil settlement survey method realized based on the monitoring device.
Background technique
The development of social economy brings the upsurge of national basis facility investment construction, at the same time, geotechnical engineering, mine
The safety problems such as exploitation also result in the highest attention of people.Settlement of stratum that mineral mining causes, geotechnical engineering structure it is heavy
The engineering accidents such as drop and collapsing are usually associated with great casualties and great economic loss, cause extremely bad society
It influences.In addition, the traffic bases such as high-speed rail construction project is complicated severe to saturated yielding etc. as numerous high-speed railway routes are in succession open-minded
The trend of geological environment development is obvious, and a little deformation (such as sedimentation) of earth's surface all can be larger to the train generation run at high speed
Disturbance.
Ground settlement is the macro manifestations of deep Different Strata sedimentation and deformation accumulation superposition, and the sedimentation on different layers position stratum becomes
Shape not only threatens the safety for passing through the stratum structures, while also can bring insecurity factor to ground surface works structure.It is existing
Deep soil settlement survey often take porous monitoring method, each hole location corresponds to different depth；Porous monitoring causes construction work
Work amount is big, and instrument and equipment dispersion, monitoring cost rises.
Summary of the invention
The purpose of the present invention is to provide a kind of optical fiber single hole deep soil settlement survey devices, to solve to exist in the prior art
Porous monitoring construction is complicated, equipment dispersion, problem at high cost.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of optical fiber single hole deep soil settlement survey dress is provided
It sets, is implanted into stratum by implant holes, comprising: join end to end and be respectively arranged on multiple cylinders in different depth stratum, difference
Multiple Fiber Bragg Grating Sensor Arrays, the solution that is connect with the Fiber Bragg Grating Sensor Array set on multiple cylinder inner walls
Adjust equipment and data processing module and the filled media for filling gap between the cylinder and the implant holes；
The Fiber Bragg Grating Sensor Array includes being respectively arranged in multiple cylinders and being connected simultaneously by an optical fiber
The multiple fiber-optic grating sensors being axially distributed along the cylinder, the optical fiber and the demodulated equipment and data processing module connect
It connects.
Further, the cylinder is stainless steel component, and the wall thickness of the cylinder is 0.5-2mm.
Further, there are four the Fiber Bragg Grating Sensor Array is set, wherein three fiber-optic grating sensor battle arrays
90 ° of column interval is distributed in the cylinder inner wall, another described fiber-optic grating sensor battle array is vacantly arranged in the cylinder inner wall；
It is laid by 180 ° of the Fiber Bragg Grating Sensor Array in interval, realizes detorsion；Meanwhile by being spaced 90 ° of fiber grating
Sensor array is judged to generate the curved direction of extruding；Temperature sensing is realized by hanging Fiber Bragg Grating Sensor Array
And compensation.
Further, the filled media is cement mortar.
Further, the cylinder has been sequentially distributed the first bonding pad, cylinder for making the filled media from top to bottom
It pours into and is used to make the consolidation zone of the round tube and surrounding soil compatible deformation, the biography for accommodating the fiber-optic grating sensor
Second bonding pad of sensillary area and the second bonding pad, the cylinder is solid by the first bonding pad of connector and the adjacent cylinder
It connects, the fiber grating in the sensing unit is encapsulated using long gauge length mode, for sensing the mean strain of corresponding region cylinder.
Further, the consolidation zone includes being tightly connected and being located at below first bonding pad with the cylinder inner wall
The first sealant, be tightly connected and be located above the sensing unit with the cylinder inner wall the second sealant, be set to it is described
Slurry-feeding hole and connection described first on cylinder side wall and between first sealant and second sealant connect
Connect the optical-fibre channel in area and the sensing unit.
Further, the connector includes sleeve and the internal thread structure in the sleeve, first connection
Area includes the first external screw thread set on the cylinder outer wall and with internal thread structure cooperation, and second bonding pad includes setting
In the cylinder outer wall and with the internal thread structure cooperation the second external screw thread；First external screw thread and the described second outer spiral shell
Line rotation direction is reversed, the internal thread structure include set on described sleeve one end and with first external screw thread cooperation first in spiral shell
Line and set on the sleeve other end and with second external screw thread cooperation the second internal screw thread, first internal screw thread with it is described
Second internal screw thread is oppositely oriented.
Further, the sleeve wall thickness is greater than 5mm, and the sleeve radially protruding is end cap in the part of the cylinder.
The beneficial effect of optical fiber single hole deep soil settlement survey device provided by the invention is: compared with prior art, this
Invention optical fiber single hole deep soil settlement survey device, fiber-optic grating sensor also can be carried out accurate induction, base to small strain
In the technical advantage that the single fiber multisensor of fiber-optic grating sensor is multiplexed, cylinder cooperates fiber-optic grating sensor to constitute sensing element
Part, each cylinder correspond to a layer position on stratum, and sensing element can be accurately tracked by the strain variation of each layer of position, by every
The accumulative monitoring to realize the stratum settlement amount of one layer of position strain.Optical fiber single hole deep soil settlement survey device provided by the invention
It can be achieved with supervising the synchronous of different layers position sedimentation and deformation by punching and being implanted into the cylinder with Fiber Bragg Grating Sensor Array
It surveys, structure is simple, and easy for installation, monitoring cost is low, avoids that porous monitoring construction is complicated, disperse and monitoring cost is high asks
Topic.
The present invention also provides a kind of optical fiber single hole deep soil settlement survey methods, are supervised based on above-mentioned optical fiber single hole delaminating deposition
It surveys device to realize, include the following steps:
Implant holes is bored, and implantation is equipped with the cylinder of the Fiber Bragg Grating Sensor Array in implant holes, made described
Each of cylinder and stratum layer position correspond；
Make to couple between the cylinder and stratum using the filled media；
It is tracked described in each using the sensing element that the Fiber Bragg Grating Sensor Array and the cylinder are compounded to form
The strain variation of layer position, passes through accumulative acquisition stratum settlement information of the strain variation in cylinder.
Further, the sensing element being compounded to form using the Fiber Bragg Grating Sensor Array and the cylinder with
The strain variation of each layer position of track passes through accumulative acquisition stratum settlement packet of the strain variation in cylinder
It includes:
Frictional force caused by stratum settlement the fiber grating is passed to by the filled media and the round tube to pass
Sensor array makes the fiber-optic grating sensor obtain strain signal；
The strain signal is handled by the demodulated equipment and data processing module, different layers position is obtained and settles information；
The sedimentation information includes macroscopical settling amount, wherein macroscopical settling amount of designated layer position is equal to the designated layer position
The sum of the sedimentation and deformation of all layers of position of lower section.
The beneficial effect of optical fiber single hole deep soil settlement survey method provided by the invention is: compared with prior art, this
Invention optical fiber single hole deep soil settlement survey method, by drilling and being implanted into above-mentioned sensing element on stratum, and in cylinder and
Filling can guarantee to strain the accurate transmission to the filled media of cylinder, to obtain accurately strain letter in gap between implant holes
Number, then strain signal is handled by demodulated equipment and data processing module, accurately sedimentation strain information, test side can be obtained
Method is simple, and difficulty of construction is small, and the technical advantage of the single fiber multisensor multiplexing based on fiber-optic grating sensor utilizes single gaging hole
Realize the Simultaneous Monitoring of different layers position sedimentation and deformation.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the distributed architecture schematic diagram of optical fiber single hole deep soil settlement survey device provided in an embodiment of the present invention；
Fig. 2 is the internal structure cross-sectional view of cylinder in Fig. 1；
Fig. 3 is the plan structure cross-sectional view of cylinder in Fig. 1；
Fig. 4 is the internal structure cross-sectional view of connector in Fig. 1；
Fig. 5 is the working principle diagram of optical fiber single hole deep soil settlement survey device provided in an embodiment of the present invention；
Fig. 6 is the flow chart of optical fiber single hole deep soil settlement survey method provided in an embodiment of the present invention.
Wherein, each appended drawing reference in figure:
1- implant holes；2- cylinder；The first bonding pad 201-；The consolidation zone 202-；The first sealant of 2021-；2022- second is close
Sealing；2023- slurry-feeding hole；2024- optical-fibre channel；The sensing unit 203-；The second bonding pad 204-；3- optical fiber；4- fiber grating passes
Sensor；5- supervision and management center；6- photoswitch；7- (FBG) demodulator；8- industrial personal computer；9- communication interface；10- wireless communication module；11-
Connector；1101- sleeve；The first internal screw thread of 1102-；The second internal screw thread of 1103-
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
Also referring to Fig. 1 to Fig. 5, now optical fiber single hole deep soil settlement survey device provided by the invention is illustrated.
The optical fiber single hole deep soil settlement survey device is implanted into stratum by implant holes 1, including joins end to end and be respectively arranged on difference
Multiple cylinders 2 in depth stratum, the multiple Fiber Bragg Grating Sensor Arrays for being respectively arranged on multiple 2 inner walls of cylinder, with optical fiber light
The demodulated equipment and data processing module and for filling the gap between cylinder 2 and implant holes 1 of gate sensor array connection
Filled media；
Fiber Bragg Grating Sensor Array includes being respectively arranged in multiple cylinders 2 and by a series connection of optical fiber 3 and along cylinder 2
The multiple fiber-optic grating sensors 4 being axially distributed, optical fiber 3 are connect with demodulated equipment and data processing module.
An optical fiber 3 is arranged in one Fiber Bragg Grating Sensor Array, the number of outgoing of monitoring point is simplified, convenient for data
Acquisition and the management at scene.
It should be noted that cylinder 2 should be the relatively thin cylinder of wall thickness, so that strain can effectively pass to fiber grating biography
Sensor 4.
Optical fiber sensing technology has become the hot spot of ground worker research as a kind of emerging monitoring technology means,
And fiber grating sensing technology is wherein comparatively mature one kind, with precision is high, stability is good, distance sensing is long etc.
Advantage.
Fiber grating is prepared by phase masks a kind of along fibre core folding using highly doped germanium light-sensitive optical fibre as substrate
Penetrate the periodically variable structure of rate.When there is broadband light incident optical grating, grating can carry out selective reflecting to incident light, instead
The central wavelength for penetrating light is bragg wavelength.Bragg wavelength is represented by λB=2neffΛ, wherein λBFor the Bradley of grating
Lattice wave is long；neffFor the effective refractive index of grating；Λ is grating pitch.
The pitch and effective refractive index of grating are influenced by ambient temperature and strain, pass through precise measurement grating reflected light
Bragg wavelength, so that it may determine the temperature or strain at grating；It can also be made by the way that fiber grating is carried out effectively encapsulation
Displacement sensor changes to detect extraneous micro-displacement.
Cylinder 2 cooperates fiber-optic grating sensor 4 to constitute sensing element, and sensing is transmitted by cylinder 2 and surrounding filled media
Stratum ground settle caused by frictional force.Since cylinder 2 is coupled by filled media with stratum, the sedimentation of surrounding formation ground becomes
The stress that shape generates accurately can pass to cylinder 2 by filled media, then pass to fiber-optic grating sensor 4 by cylinder 2,
So that fiber-optic grating sensor 4 can accurately sense strain.
Optical fiber single hole deep soil settlement survey device provided by the invention, compared with prior art, fiber-optic grating sensor 4 is right
Small strain also can be carried out accurate induction, the technical advantage of the single fiber multisensor multiplexing based on fiber-optic grating sensor 4,
Cylinder 2 cooperates fiber-optic grating sensor 4 to constitute sensing element, a layer position on the corresponding stratum of each cylinder 2, sensing element meeting
It is accurately tracked by the strain variation of each layer of position, the accumulative monitoring to realize the stratum settlement amount strained by each layer of position.
Optical fiber single hole deep soil settlement survey apparatus structure provided by the invention is simple, by punching and being implanted into fiber-optic grating sensor
The cylinder 2 of array can be achieved with the Simultaneous Monitoring to different layers position sedimentation and deformation, and structure is simple, and easy for installation, monitoring cost is low,
Avoid the problem that porous monitoring construction is complicated and monitoring cost is high.
In turn, system is based on theory of the fiber optical and combines advanced transmission means, realizes to stratum different layers position
The quasi-distributed real-time monitoring of sedimentation and deformation, it is ensured that surrounding engineering structure is on active service safely.
Further, referring to Fig. 5, one kind as optical fiber single hole deep soil settlement survey device provided by the invention is specific
Embodiment, demodulated equipment and data processing module include data collection station and carry out the monitoring of information exchange with data collection station
Administrative center 5.Data collection station is connect by optical cable with the optical fiber 3 of field monitoring node, and real-time data acquisition and processing are used for；
Data collection station includes photoswitch 6, for switching different channels；(FBG) demodulator 7 changes for demodulating grating wavelength and restores strain
Value；Industrial personal computer 8, for the temporary preservation and processing to solution adjusting data；Communication interface 9 is used between wireless communication module 10
Complete communication；Wireless communication module 10, supervision and management center 5 are connect with data collection station by wireless transmission method, are responsible for whole
The dynamic analysis of a route find dangerous situation and publication early warning report in time.Demodulated equipment and data processing module can realize nobody
It is on duty, have both periodic monitor and real time remote operation monitoring both of which.
Further, a kind of specific embodiment as optical fiber single hole deep soil settlement survey device provided by the invention,
Cylinder 2 is stainless steel component, and the wall thickness of cylinder 2 is 0.5-2mm.
Specifically, a kind of specific embodiment as optical fiber single hole deep soil settlement survey device provided by the invention, circle
The length equidimension of cylinder 2 can be arranged according to stratigraphic horizon thickness and other measurement requests, for example, be set as 1m long, outer diameter 40mm,
Wall thickness is the thin-wall circular tube of 1mm.
Further, referring to Fig. 2, one kind as optical fiber single hole deep soil settlement survey device provided by the invention is specific
Embodiment, there are four Fiber Bragg Grating Sensor Array is set, wherein three 90 ° of Fiber Bragg Grating Sensor Array intervals are distributed in circle
2 inner walls of cylinder, another fiber-optic grating sensor battle array are vacantly arranged in 2 inner wall of cylinder；Pass through 180 ° of the optical fiber grating sensing in interval
Device array is laid, and realizes detorsion；Meanwhile by being spaced 90 ° of Fiber Bragg Grating Sensor Array, it is curved to judge that generation squeezes
Bent direction；Temperature sensing and compensation are realized by hanging Fiber Bragg Grating Sensor Array.
Further, a kind of specific reality refering to Fig. 3, as optical fiber single hole deep soil settlement survey device provided by the invention
Mode is applied, a Fiber Bragg Grating Sensor Array includes at least one fiber-optic grating sensor 4.In order to simplify structure, each
Fiber-optic grating sensor 4 and cylinder 2 in Fiber Bragg Grating Sensor Array correspond.That is a Fiber Bragg Grating Sensor Array
One fiber-optic grating sensor 4 is only set in a cylinder 2.
Fiber Bragg Grating Sensor Array around 2 axis of cylinder it is uniformly distributed there are four, wherein three Fiber Bragg Grating Sensor Arrays
In fiber-optic grating sensor 4 it is affixed with the inner wall of cylinder 2 respectively and for sense strain, another fiber-optic grating sensor battle array
Fiber-optic grating sensor 4 in column is used for sensing temperature.The Fiber Bragg Grating Sensor Array for being spaced 90 ° by three lays (Fig. 3
In three fiber-optic grating sensors 4 positioned above, below and right side), can more effectively realize detorsion, and judge
It generates and squeezes curved direction；Meanwhile being averaged by the Fiber Bragg Grating Sensor Array at two 180 ° of intervals, it further decreases
The influence of inhomogeneous deformation.In order to reject the influence of temperature, the fiber grating in another Fiber Bragg Grating Sensor Array is passed
Sensor 4 (three fiber-optic grating sensors 4 for being located at left side in Fig. 3) is contacted but is not fixed with the inner wall of cylinder 2, as temperature
It spends sensor to use, so that it may provide the temperature field information of this layer of position ground.
Specific calculating process:
By taking attached drawing as an example, it is located above in Fig. 3, three fiber-optic grating sensors 4 respectively first biography on right side and lower section
Sensor, second sensor and 3rd sensor, three fiber-optic grating sensors 4 that left side is located in Fig. 3 are the 4th sensor.Benefit
It is averaged with first sensor and 3rd sensor, realizes detorsion, calculating process are as follows: first calculated n-th layer cylinder 2 and strain
εN is average=(ε1+ε3)/2, then calculate 2 deflection d of n-th layer cylindern=εN is average×Ln, finally obtain the macroscopic view sedimentation on n-th layer stratum
AmountExtruding bending direction is carried out using the tension and compression combination of first sensor, second sensor and 3rd sensor to sentence
Break and compensate part inhomogeneous deformation, the calculation formula of bending angle is α=arctan (ε2/ε1).Wherein, ε1For the first sensing
The strain that device senses, ε2For the strain that second sensor senses, ε3For the strain that 3rd sensor senses, LnFor n-th layer
Effective sensing length of circle of position cylinder.
Further, a kind of specific embodiment as optical fiber single hole deep soil settlement survey device provided by the invention,
Filled media is cement mortar.Cement mortar should then have required intensity and cohesive force after curing, suitable for making cylinder 2 and planting
Enter 1 close-coupled of hole.
Further, refering to fig. 1, Fig. 2 and Fig. 4, as optical fiber single hole deep soil settlement survey device provided by the invention
A kind of specific embodiment, cylinder 2 have been sequentially distributed the first bonding pad 201, in cylinder 2 and for making to fill from top to bottom
Medium pours into and is used to make the consolidation zone 202 of round tube 2 and surrounding soil compatible deformation, for accommodating fiber-optic grating sensor 4
Second bonding pad 204 of sensing unit 203 and the second bonding pad 204, cylinder 2 passes through connector 11 and the first of adjacent cylinder 2
Bonding pad 201 is affixed.
Consolidation zone 202 is for penetrating into filled media, it is ensured that is integrally formed with the filled media outside cylinder 2, keeps synchronizing
Deformation.
Further, referring to Fig. 2, one kind as optical fiber single hole deep soil settlement survey device provided by the invention is specific
Embodiment, consolidation zone 202 include the first sealant that 201 lower section of the first bonding pad is tightly connected and be located at 2 inner wall of cylinder
2021, the second sealant 2022 of 203 top of sensing unit is tightly connected and be located at 2 inner wall of cylinder and is set on 2 side wall of cylinder
And slurry-feeding hole 2023 and the first bonding pad 201 of connection and biography between the first sealant 2021 and the second sealant 2022
The optical-fibre channel 2024 of sensillary area 203.Slurry-feeding hole 2023 is opened up on cylinder 2, is flowed into convenient for filled media, and certain in cylinder 2
Range forms consolidation zone 202, guarantees good stress transfer effect inside and outside cylinder；Meanwhile cylinder 2 is segmented by consolidation zone 202, it is each
Sensing element is responsible for the monitoring of exclusive regional subsidence, to constitute quasi-distributed monitoring system.
Specifically, a kind of specific embodiment as optical fiber single hole deep soil settlement survey device provided by the invention is used
In making the perforative optical-fibre channel 2024 of optical fiber 3 between the first sealant 2021 and the second sealant 2022 and respectively with first
Sealant 2021 and the second sealant 2022 are tightly connected.
Further, Fig. 1, Fig. 2 and Fig. 4 are please referred to, as optical fiber single hole deep soil settlement survey device provided by the invention
A kind of specific embodiment, connector 11 include sleeve 1101 and the internal thread structure in sleeve 1101, first connection
Area 201 includes the first external screw thread set on 2 outer wall of cylinder and with internal thread structure cooperation, and the second bonding pad 204 includes being set to circle
2 outer walls of cylinder and the second external screw thread cooperated with internal thread structure.1101 outer diameter of sleeve (such as selection 50mm) is greater than outside cylinder 2
Diameter can also play conventional strain gauge end relative to the part outstanding of cylinder 2 while increasing by 2 connecting portion rigidity of cylinder
The effect of cap.
Further, Fig. 2 and Fig. 4 is please referred to, one as optical fiber single hole deep soil settlement survey device provided by the invention
Kind specific embodiment, internal thread structure include the first internal screw thread set on 1101 one end of sleeve and with the cooperation of the first external screw thread
1102 and the second internal screw thread 1103 set on 1101 other end of sleeve and with the cooperation of the second external screw thread, outside the first external screw thread and second
Thread rotary orientation is on the contrary, the first internal screw thread 1102 and the second internal screw thread 1103 are oppositely oriented.2 both ends thread rotary orientation of cylinder is reversed, protects
It will not be rotated when card installation, avoid the knotting of 2 internal optical fiber 3 of cylinder.
Further, referring to Fig. 1, one kind as optical fiber single hole deep soil settlement survey device provided by the invention is specific
Embodiment, 1101 wall thickness of sleeve are greater than 5mm, and 1101 radially protruding of sleeve is end cap in the part of cylinder 2.End cap can increase
Device can also play the role of conventional strain gauge end cap in the rigidity of link position.
Referring to Fig. 6, the present invention also provides a kind of optical fiber single hole deep soil settlement survey methods, based on above-mentioned optical fiber single hole
Deep soil settlement survey device realizes that the optical fiber single hole deep soil settlement survey method includes the following steps:
Implant holes 1 is bored, the cylinder 2 for being equipped with Fiber Bragg Grating Sensor Array is implanted into implant holes 1, and make cylinder 2 and stratum
Each of layer position correspond；
Make filled media full of the gap between cylinder 2 and implant holes 1, is made between cylinder 2 and stratum using filled media
Coupling；
Become using the strain that the sensing element that Fiber Bragg Grating Sensor Array and cylinder 2 are compounded to form tracks each layer of position
Change, passes through accumulative acquisition stratum settlement information of the strain variation in cylinder.
Optical fiber single hole deep soil settlement survey method provided by the invention, by drilling on stratum and being implanted into above-mentioned sensing
Element, and in the gap between cylinder 2 and implant holes 1 filling can guarantee strain the accurate transmission to cylinder filled media,
To obtain accurate strain signal, then by demodulated equipment and data processing module processing strain signal, can obtain accurately
Strain information is settled, test method is simple, and difficulty of construction is small, the skill of the single fiber multisensor multiplexing based on fiber-optic grating sensor
Art advantage realizes the Simultaneous Monitoring of different layers position sedimentation and deformation using single gaging hole.
Further, each layer of position is tracked using the sensing element that Fiber Bragg Grating Sensor Array and cylinder are compounded to form
Strain variation, include: by accumulative acquisition stratum settlement information of the strain variation in cylinder
Frictional force caused by stratum settlement is passed into Fiber Bragg Grating Sensor Array by filled media and round tube 2, is made
Fiber-optic grating sensor 4 obtains strain signal；
The strain signal is handled by demodulated equipment and data processing module, different layers position is obtained and settles information；
Settling information includes macroscopical settling amount, wherein macroscopical settling amount of designated layer position is equal to the institute below designated layer position
There is the sum of the sedimentation and deformation of layer position
If stratum is divided into N layers, in monitoring process, sensing element can track the strain variation on each stratum, and pass through
The accumulative monitoring to realize the stratum settlement amount in 2 sensing unit 203 of cylinder.For macroscopical settling amount on n-th layer stratum, just
Equal to the sum of the sedimentation and deformation on n-layer stratum below.
Further, before brill implant holes 1 further include:
Surveying and locating bore position, it is ensured that drilling can accurately reflect the actual deformation state of periphery ground.
Specifically, boring implant holes 1 includes:
Auger machine drills to basement rock, and aperture is greater than 2 outer diameter of cylinder (such as 90mm), notices that hole wall is protected in drilling process
Shield avoids hole wall long period of soaking from existing collapse hole phenomenon occur；
After drilling, borehole cleaning is carried out.
Specifically, the cylinder 2 for being equipped with Fiber Bragg Grating Sensor Array is implanted into implant holes 1 includes:
Fiber-optic grating sensor 4 encapsulate it is intact after, scene is mounted directly in cylinder 2；
The technique for taking side group rim to transfer, is picked up the ears by symmetrical two on cylinder 2, is gradually transferred cylinder 2, is being transferred
Make to assemble two adjacent cylinders 2 in the process.
By the way of decentralization is pulled using wirerope, and guarantee decentralization process gently stable progress.Transfer it is excessively high as far as possible not
The deformation such as torsion, bending can be generated.
Specifically, the gap for being full of filled media between cylinder 2 and implant holes 1 includes:
Using slip casing by pressure, from bottom to top by the way of, while mention Grouting Pipe marginal not slurry, until filling.
Specifically, filled media proportion is cement: husky: water=1:1:0.65, cement select the ordinary silicon marked as 32.5R
Acid salt cement, sand select partial size in the clean river sand of 1.25~2.5mm.
Specifically, handling strain signal by demodulated equipment and data processing module includes:
The transducing signal of fiber-optic grating sensor 4 at different nodes is obtained by photoswitch 6；
Changed by the demodulation grating wavelength of (FBG) demodulator 7 and restores strain value；
The temporary preservation and processing of adjusting data are solved by 8 pairs of industrial personal computer；
It is communicated by completion between communication interface 9 and wireless communication module 10, by wireless communication module 10 and monitoring pipe
The wireless transmission connection of reason center 5；
Data are supervised by supervision and management center 5.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. optical fiber single hole deep soil settlement survey device, be implanted into stratum by implant holes, it is characterised in that: including joining end to end and
Multiple cylinders for being respectively arranged in different depth stratum, the multiple fiber-optic grating sensors for being respectively arranged on multiple cylinder inner walls
Array, the demodulated equipment being connect with the Fiber Bragg Grating Sensor Array and data processing module and for filling the cylinder
The filled media in gap between the implant holes；
The Fiber Bragg Grating Sensor Array includes being respectively arranged in multiple cylinders and by an optical fiber series connection and along institute
Multiple fiber-optic grating sensors that cylinder is axially distributed are stated, the optical fiber is connect with the demodulated equipment and data processing module.
2. optical fiber single hole deep soil settlement survey device as described in claim 1, it is characterised in that: the cylinder is stainless steel structure
Part, the wall thickness of the cylinder are 0.5-2mm.
3. optical fiber single hole deep soil settlement survey device as described in claim 1, it is characterised in that: the fiber-optic grating sensor
There are four array is set, wherein three 90 ° of Fiber Bragg Grating Sensor Array intervals are distributed in the cylinder inner wall, another institute
Fiber-optic grating sensor battle array is stated vacantly to be arranged in the cylinder inner wall；Pass through 180 ° of the Fiber Bragg Grating Sensor Array cloth in interval
If realizing detorsion；Meanwhile by being spaced 90 ° of Fiber Bragg Grating Sensor Array, judge to generate the curved side of extruding
To；Temperature sensing and compensation are realized by hanging Fiber Bragg Grating Sensor Array.
4. optical fiber single hole deep soil settlement survey device as described in claim 1, it is characterised in that: the filled media is cement
Mortar.
5. optical fiber single hole deep soil settlement survey device as claimed in claim 4, it is characterised in that: the cylinder from top to bottom according to
Secondary the first bonding pad, the cylinder of being distributed with is for pouring into the filled media and be used to making the round tube and surrounding soil coordination change
The consolidation zone of shape, sensing unit and the second bonding pad for accommodating the fiber-optic grating sensor, the second connection of the cylinder
Area is affixed by the first bonding pad of connector and the adjacent cylinder, and the fiber grating in the sensing unit uses long gauge length
Mode encapsulates, for sensing the mean strain of corresponding region cylinder.
6. optical fiber single hole deep soil settlement survey device as claimed in claim 5, it is characterised in that: the consolidation zone includes and institute
State the first sealant and cylinder inner wall sealed connection that cylinder inner wall is tightly connected and is located at below first bonding pad
And it is located at the second sealant above the sensing unit, is set on the cylinder side wall and is located at first sealant and described
The optical-fibre channel of slurry-feeding hole and connection first bonding pad and the sensing unit between second sealant.
7. optical fiber single hole deep soil settlement survey device as claimed in claim 6, it is characterised in that: the connector includes sleeve
And the internal thread structure in the sleeve, first bonding pad include set on the cylinder outer wall and with the internal screw thread
First external screw thread of structure cooperation, second bonding pad include cooperating set on the cylinder outer wall and with the internal thread structure
The second external screw thread；First external screw thread and the second external screw thread rotation direction are reversed, and the internal thread structure includes being set to institute
State sleeve one end and with the first internal screw thread of first external screw thread cooperation and be set to the sleeve other end and with described second
Second internal screw thread of external screw thread cooperation, first internal screw thread and second internal screw thread are oppositely oriented.
8. optical fiber single hole deep soil settlement survey device as claimed in claim 7, it is characterised in that: the sleeve wall thickness is greater than
5mm, the sleeve radially protruding are end cap in the part of the cylinder.
9. optical fiber single hole deep soil settlement survey method, which is characterized in that based on the light as described in any one of claim 1-8
Fine single hole deep soil settlement survey device is realized, is included the following steps:
Implant holes is bored, and implantation is equipped with the cylinder of the Fiber Bragg Grating Sensor Array in implant holes, makes the cylinder
It is corresponded with each of stratum layer position；
Make to couple between the cylinder and stratum using the filled media；
Each described layer position is tracked using the sensing element that the Fiber Bragg Grating Sensor Array and the cylinder are compounded to form
Strain variation, pass through accumulative acquisition stratum settlement information of the strain variation in cylinder.
10. optical fiber single hole deep soil settlement survey method described in claim 9, it is characterised in that: described to utilize the fiber grating
The sensing element that sensor array and the cylinder are compounded to form tracks the strain variation of each layer position, is answered by described
Accumulative acquisition stratum settlement information of the variation in cylinder includes:
Frictional force caused by stratum settlement is passed into the fiber-optic grating sensor by the filled media and the round tube
Array makes the fiber-optic grating sensor obtain strain signal；
The strain signal is handled by the demodulated equipment and data processing module, different layers position is obtained and settles information；
The sedimentation information includes macroscopical settling amount, wherein macroscopical settling amount of designated layer position is equal to below the designated layer position
All layers of position the sum of sedimentation and deformation.
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| CN201811516638.5A CN109520471B (en) | 2018-12-12 | 2018-12-12 | Optical fiber single-hole layered settlement monitoring device and monitoring method thereof |
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| CN201811516638.5A CN109520471B (en) | 2018-12-12 | 2018-12-12 | Optical fiber single-hole layered settlement monitoring device and monitoring method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137951A (en) * | 2021-05-19 | 2021-07-20 | 中国地质大学（武汉） | Ground settlement monitoring device and implementation method thereof |
| CN114370852A (en) * | 2021-12-15 | 2022-04-19 | 安徽理工大学 | Accurate evaluation method and system for working face well-ground combined test ground subsidence basin |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221332A (en) * | 2011-04-01 | 2011-10-19 | 西安科技大学 | Fiber grating multi-point sensing device for unconsolidated strata as well as monitoring system and method |
| CN105043345A (en) * | 2015-07-10 | 2015-11-11 | 镇江绿材谷新材料科技有限公司 | Distributed settlement measurement device and measurement method |
| CN105547364A (en) * | 2015-12-23 | 2016-05-04 | 南京航空航天大学 | Splicing-type distributed optical fiber sensing system used for monitoring in internal portion of roadbed |
| CN206618412U (en) * | 2017-03-29 | 2017-11-07 | 中铁十四局集团有限公司 | Soil body settlement sensor and soil body sedimentation monitoring system |
| CN108168510A (en) * | 2017-12-18 | 2018-06-15 | 河海大学 | Subgrade settlement DEFORMATION MONITORING SYSTEM and its installation method based on fiber grating |
| CN207540566U (en) * | 2017-11-08 | 2018-06-26 | 江苏筑镹营造科技有限公司 | Anchor pole intelligent detection device in building body |
| CN209181770U (en) * | 2018-12-12 | 2019-07-30 | 石家庄铁道大学 | Optical fiber single hole deep soil settlement survey device |
-
2018
- 2018-12-12 CN CN201811516638.5A patent/CN109520471B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221332A (en) * | 2011-04-01 | 2011-10-19 | 西安科技大学 | Fiber grating multi-point sensing device for unconsolidated strata as well as monitoring system and method |
| CN105043345A (en) * | 2015-07-10 | 2015-11-11 | 镇江绿材谷新材料科技有限公司 | Distributed settlement measurement device and measurement method |
| CN105547364A (en) * | 2015-12-23 | 2016-05-04 | 南京航空航天大学 | Splicing-type distributed optical fiber sensing system used for monitoring in internal portion of roadbed |
| CN206618412U (en) * | 2017-03-29 | 2017-11-07 | 中铁十四局集团有限公司 | Soil body settlement sensor and soil body sedimentation monitoring system |
| CN207540566U (en) * | 2017-11-08 | 2018-06-26 | 江苏筑镹营造科技有限公司 | Anchor pole intelligent detection device in building body |
| CN108168510A (en) * | 2017-12-18 | 2018-06-15 | 河海大学 | Subgrade settlement DEFORMATION MONITORING SYSTEM and its installation method based on fiber grating |
| CN209181770U (en) * | 2018-12-12 | 2019-07-30 | 石家庄铁道大学 | Optical fiber single hole deep soil settlement survey device |
Non-Patent Citations (1)
| Title |
|---|
| 李峰: "《基于高陡边坡变形监测的光纤光栅传感技术研究》" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137951A (en) * | 2021-05-19 | 2021-07-20 | 中国地质大学（武汉） | Ground settlement monitoring device and implementation method thereof |
| CN113137951B (en) * | 2021-05-19 | 2022-01-11 | 中国地质大学（武汉） | Ground settlement monitoring device and implementation method thereof |
| CN114370852A (en) * | 2021-12-15 | 2022-04-19 | 安徽理工大学 | Accurate evaluation method and system for working face well-ground combined test ground subsidence basin |
| CN114370852B (en) * | 2021-12-15 | 2024-03-05 | 安徽理工大学 | Accurate evaluation method and system for working face well-ground joint test ground subsidence basin |
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| CN109520471B (en) | 2023-09-19 |
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