CN106017523A - Method of making multifunctional smart anchor rod - Google Patents
Method of making multifunctional smart anchor rod Download PDFInfo
- Publication number
- CN106017523A CN106017523A CN201610560845.5A CN201610560845A CN106017523A CN 106017523 A CN106017523 A CN 106017523A CN 201610560845 A CN201610560845 A CN 201610560845A CN 106017523 A CN106017523 A CN 106017523A
- Authority
- CN
- China
- Prior art keywords
- grating
- sleeve pipe
- long
- optical fiber
- gauge length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 74
- 230000003287 optical effect Effects 0.000 claims description 23
- 238000004873 anchoring Methods 0.000 claims description 20
- 239000003822 epoxy resin Substances 0.000 claims description 16
- 229920000647 polyepoxide Polymers 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 229920002457 flexible plastic Polymers 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000007596 consolidation process Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000007373 indentation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 23
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 230000008093 supporting effect Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- 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
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
- G01D3/036—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method of making a multifunctional smart anchor rod. The strain values of a smart anchor rod at different depths are measured using a fiber grating sensor installed on the smart anchor rod, so the axial forces of the anchor rods at different depths can be calculated, the bearing capacity and the anchorage force of the anchor rod can be judged and evaluated, and the internal deformation and displacement change of a surrounding rock under the action of load or the like can be judged. A long-gauge fiber grating sensor used in the invention is simple to make and relatively low in cost. The multifunctional smart anchor rod of the invention, which is mainly composed of a commonly used solid anchor rod, a welding-free long-gauge multi-grating sensor composed of multiple long-gauge fiber grating sensing units, and a multi-point temperature compensation sensor, is easy to make and easy to lay, and has a broad application prospect and good economic benefit.
Description
Technical field
The present invention relates to the anchor axial force monitoring system of a kind of tunnel, ground and slope project, be specifically related to a kind of based on length
The manufacture method of the multifunctional intellectual anchor pole of gauge length optical fibre grating.
Background technology
Suspension roof support uses in the earth's surface engineerings such as side slope, ground deep basal pit and the underground chamber such as tunnel, mining are constructed
A kind of its support reinforcement mode.Suspension roof support is the mechanical state being changed country rock itself by the anchor pole within country rock, at excavation
Form an entirety and stable rock band around face, utilize anchor pole jointly to act on country rock, reach to safeguard country rock or lane
The purpose that road etc. are stable.It is the method for protecting support of a kind of active defense, is the major transformation of the supporting such as country rock, mine.Anchor
Bar not only supporting effect is good, and materials save, construction is simple, be conducive to mechanized operation, speed of application fast.Therefore anchor pole
By substantial amounts of use in the engineerings such as a lot of buildings, ground, tunnel, mining, such as tunnel excavation based on New Austrian Tunneling Method,
Anchor pole usage amount several ten thousand easily, additionally such as Three Gorges Dam Project, has also used tens0000 various anchor poles.
Along with being widely used of suspension roof support, for anchor pole stress, bearing capacity and possible damage in country rock
Carry out in real time or periodic monitoring etc. situation, judge hence for the support conditions of country rock, stable case etc. and seem particularly
Important, and have become as the important topic of association area.At present both at home and abroad for anchor pole stress in surrounding rock supporting, hold
Carrying and the method for testing of degree of impairment can be summarized as two big classes substantially, one type is to use force-measuring anchor stock, anchor rod drawing
Meter, strain gauge and foil gauge test anchor pole stressing conditions under drawing effect and damage by anchor pole " pull-out test "
Situation；Another kind of, use and compare indirectly mode, utilize electromagnetic wave, sound wave etc. to come in the reflection differences of different medium layer
The degree of saturation of detection mortar anchoring body, the stress of Indirect evaluation anchoring and degree of impairment.But these methods are in general,
Also exist affected by environment greatly, poor durability, the shortcomings such as long-time stability are poor, and test error is big, for as ground, tunnel
The environment such as road, mining is relatively more severe, form of construction work is extensive, but measuring accuracy requires high practical engineering application, and it is suitable for
Property shows thin especially.
The optical fiber sensing technology that development in recent years is got up has a good endurance, stable performance, electromagnetism interference, is easy to distribution
The advantages such as formula measurement, also propose new thinking to anchor axial force detection, non-destructive tests etc..Current scholar's base of being correlated with
Suspension roof support detected in technology such as BOTDR, BOTDA and has been monitored, but due to the bottleneck of current demodulation techniques
Limit, its measuring accuracy wretched insufficiency；And FBG grating is high due to precision, strain measurement can reach 1 μ ε, and encapsulates
After can waterproof, corrosion-resistant, long-term behaviour is relatively good, can not only sense, and can be used for transmit data, beneficially networking
With monitoring in real time, it is widely used in the health monitoring of structure.Dalian University of Technology etc. are also by grating test
Technology has made a lot of useful work in terms of anchor pole monitoring, but is all based on point type strain testing, can only obtain very
The strained situation of local, but it is difficult to describe exactly stress and the deformation condition of the bigger anchor pole total length of scale ratio, it is impossible to right
The damage of anchor pole provides effective judgement.Generally speaking, there is following problem in current method of testing, the most simple
And simple optical fiber and the grating technology must applied, often due to not only its transducing part, and its lead-in wire is all easily damaged, no
Adapt to the construction environment of these Practical Project extensive style；2. anchor structure yardstick is big, and damage profile scope is wide, tradition
Point type sensing be difficult to accurate to capture damage；The ess-strain of anchor pole different depth is the most all ignored in the most traditional monitoring
Change, and actual country rock produces deformation due to country rock under load action, or mechanical equivalent of light excavation and the reason of explosion,
Often there will be some fragmentations in the rock stratum near excavation face, under force-bearing of surrounding rock mass effect, will appear from internal force inside it and heavily divide
Cloth, therefore on the position of anchor pole different depth, its ess-strain is likely to different；The most current optical fiber distributed type
Measuring technology is due to technical bottleneck problem, and precision is the lowest, and practicality is little；The most traditional grating test, is all base
In between grating with grating, the welding of lead-in wire connect and is realized, but the welding of optical fiber more easily causes damage and ruptures, and significantly
Ground increases its light loss, thus affects its test performance；The most traditional based on point type test mode, this point can only be obtained
Strain, it is impossible to obtain the displacement of anchor pole.
In order to improve the verity of strain testing, reliability and noise robustness, Southeast China University have developed length
Gauge length optical fibre grating strain transducer, and Successful utilization is in the health monitoring of structure.All kinds of sensing based on fiber grating
The exploitation of device is carried forward vigorously, but the most little at present for the research of anchor pole and wall rock's level based on fiber grating.Mesh
The method that front test based on grating is all based on point type strain testing, holds for utilizing long gauge length optical fibre grating to carry out anchor pole
The research such as load situation, ess-strain situation and fault localization retrieval at home and abroad there is no Patents and pertinent literature.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one has pinpoint accuracy, high-durability, structure letter
Single, cheap manufacture method based on long gauge length optical fibre grating intelligent anchor rod.
The technical solution used in the present invention is: a kind of multifunctional intellectual anchor pole, including the weldless many grating sensors of long gauge length,
Fiber grating multi-point temp compensates aiding sensors, epoxy resin or anchoring adhesive, armored optical cable and flexible plastic sleeve；
The many grating sensors of the long gauge length of described weldless and fiber grating multi-point temp compensate aiding sensors and are arranged on anchor pole
Along the sulculus longitudinally opened, and encapsulated by epoxy resin or anchoring adhesive；
The many grating sensors of the long gauge length of described weldless include multiple long gauge length optical fibre grating sensing unit being sequentially connected in series, institute
State long gauge length optical fibre grating sensing unit and include sleeve pipe, the optical fiber being encapsulated in sleeve pipe and the grating being scribed on optical fiber, light
Fine two ends are separately fixed at the anchoring section of sleeve pipe；
Described fiber grating multi-point temp compensates aiding sensors and includes sleeve pipe, the optical fiber being encapsulated in sleeve pipe and be scribed at light
Grating on fibre, one end of optical fiber is fixed on the anchoring section of sleeve pipe, and the other end is free, sleeve pipe closed at both ends；
The many grating sensors of the long gauge length of described weldless and fiber grating multi-point temp compensate aiding sensors respectively with armouring
Optical cable connects, and draws in anchor pole, and described armored optical cable is through among flexible plastic sleeve.
The manufacture method of above-mentioned a kind of multifunctional intellectual anchor pole, including following step:
(1) the weldless many grating sensors of long gauge length are made
(a1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；
(a2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, requires to design according to engineering test
The anchor points of each grating, and cut out multiple breach according to anchorage point on sleeve pipe, penetrate
With the single-mode fiber of multiple gratings, adjust the position of grating and sleeve pipe breach；
(a3) optical fiber two ends are applied certain prestressing force by traction apparatus, inject in sleeve pipe indentation, there solid simultaneously
Gum deposit water forms anchoring, traction apparatus is decontroled, thus encapsulate out containing the long mark of multiple continuous print after consolidation
Away from optical fiber grating sensing unit and the many grating sensors of long gauge length that do not have fusion point；
(a4) for each long gauge length optical fibre grating sensing unit, the two ends of the optical fiber in sleeve pipe are passed through respectively
Consolidation glue fixes with sleeve pipe, though the optical fiber of remainder is then contactless with internal surface of sleeve pipe or has slight
Contact, but frictional force is minimum negligible；
(a5) wrap up composite saturated ring epoxy resins further in set tube outside, carry out the long gauge length of weldless many
The integrative packaging of grating sensor itself is reinforced；
(2) make multi-point temp and compensate aiding sensors
(b1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；The Position Design of these gratings can be in the many grating sensors of gauge length long with weldless
Multiple grating one_to_one corresponding, or carry out temperature according to the thought carrying out temperature interpolation along rock-bolt length
Light filling grid Position Design；The wavelength of these gratings not only can not have phase in temperature compensation sensor
With, and the grating wavelength among the many grating sensors of gauge length long with weldless also can not have identical ripple
Long；
(b2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, closes with glue a layer of sleeve pipe,
Certain one end of the many gratings two ends tail optical fiber carved is cut short, is inserted in sleeve pipe so that it is in light
The position of grid is near certain position designed, and the tail optical fiber cutting short tail optical fiber side contracts in sleeve pipe
Portion and distance sleeve afterbody have certain distance, and this distance will not encounter the encapsulation of sleeve pipe afterbody with this tail optical fiber
Glue be principle, then at sleeve pipe two ends inject consolidate glue a little, be allowed to close formation one
The individual temperature compensation sensor containing multiple gratings.
(b3) for the optical fiber pigtail with multiple gratings being packaged in sleeve pipe, the contracting of its one end in sleeve pipe completely from
By, the other end is drawn with casing cement and as lead-out wire, and optical fiber can free skating completely in sleeve pipe
Dynamic；
(b4) wrap up composite saturated ring epoxy resins further in set tube outside, carry out temperature-compensating auxiliary and pass
The integrative packaging of sensor itself is reinforced；
(3) multifunctional intellectual anchor pole is made
(c1) entity anchor pole is selected, and along longitudinally opening a sulculus；Prepare the armored optical cable of two moderate length,
And be through among a diameter flexible plastic sleeve moderate with hardness, armored optical cable compares flexible plastic sleeve
Slightly longer, two is exposed；
(c2) long for the weldless the made many grating sensors of gauge length and temperature-compensating aiding sensors are fixed on anchor
In the sulculus that bar is left, and connect with armored optical cable respectively, draw in anchor pole；The long mark of weldless
The molten of melting welding is carried out respectively with armored optical cable away from many grating sensors and temperature-compensating aiding sensors
Plumb joint is positioned at anchor pole sulculus, and armored optical cable retains to have in sulculus and can play anchorage effect
Length, so after encapsulation, the stress of external cable is not result in internal sensor stress；
(c3) in anchor pole sulculus, long for the weldless many gratings of gauge length, to filling and leading up, are passed by injection ring epoxy resins or anchoring adhesive
Sensor and multi-point temp compensate aiding sensors and are packaged as a whole with anchor pole, are formed final multi-functional
Intelligent anchor rod.
Beneficial effects of the present invention:
(1) the intelligent anchor rod principle of the present invention is simple and reliable, and method of testing novelty is ingenious.The present invention is mainly by peace
The fiber-optic grating sensor being contained on intelligent anchor rod measures the intelligent anchor rod strain value at different depth, thus calculates that anchor pole exists
The axle power of different depth, thus the bearing capacity and its anchor force to anchor pole judges and evaluates, simultaneously also can be to enclosing
Rock is internal under the effect of load etc. to be deformed making certain judgement with change in displacement；
(2) the long gauge length optical fibre grating sensor processing technology of the present invention is simple, and cost is compared the cheapest.The present invention
Main by the solid anchor pole commonly used and the long gauge length of weldless being made up of multiple long gauge length optical fibre grating sensing unit how light
Gate sensor is also aided with multi-point temp and compensates sensor composition, makes simple, and it is convenient to lay, have broad application prospects and
Good economic benefit；
(3) the many grating sensors of the long gauge length of the weldless of the present invention are by the long gauge length optical fibre grating sensing unit of multiple series connection
Composition, therefore can not only measure strain and the axle power situation of the anchor pole of different depth, moreover it is possible to measure the deflection that anchor pole is axial,
Obtain sedimentation or the displacement of sliding of country rock etc.
(4) the many grating sensors of the long gauge length of the weldless of the present invention, by the multiple naked grating envelope being scribed on an optical fiber
Dress forms, therefore each sensing unit Nature Link each other, it is not necessary to welding, it is to avoid at fused fiber splice, light loss is big,
The most disconnected shortcoming；
(5) itself have employed composite and epoxy resin envelope due to the weldless of the present invention many grating sensors of long gauge length
Dress, the superior performances such as it is antirust, corrosion-resistant that it is water-fast, and it is not afraid of electromagnetic shielding and interference, after anchor pole integrative packaging
Can be suitably used for environmental attack especially, there is good durability and wide applicability；
Accompanying drawing explanation
Fig. 1 is the multifunctional intellectual anchor pole organigram of the present invention；
Fig. 2 is the longitudinal sectional view of Fig. 1；
Fig. 3 is the transverse sectional view of Fig. 1；
Fig. 4 is weldless long gauge length many grating sensors schematic diagram of the present invention；
Fig. 5 is the schematic diagram of the multi-point temp compensation aiding sensors of the present invention.
Detailed description of the invention
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
As Figure 1-5, a kind of multifunctional intellectual anchor pole, including the weldless many grating sensors of long gauge length 1, optical fiber light
Grid multi-point temp compensates aiding sensors 2, epoxy resin or anchoring adhesive 3, armored optical cable 4 and flexible plastic sleeve 5；
The many grating sensors of the long gauge length of described weldless 1 and fiber grating multi-point temp compensate aiding sensors 2 and are arranged on anchor
Bar 6 is along the sulculus longitudinally opened, and is encapsulated by epoxy resin or anchoring adhesive 3；
The many grating sensors of the long gauge length of described weldless 1 include multiple long gauge length optical fibre grating sensing unit being sequentially connected in series,
Described long gauge length optical fibre grating sensing unit includes sleeve pipe, the optical fiber being encapsulated in sleeve pipe and the grating being scribed on optical fiber,
The two ends of optical fiber are separately fixed at the anchoring section of sleeve pipe；
Described fiber grating multi-point temp compensates aiding sensors 2 and includes sleeve pipe, the optical fiber being encapsulated in sleeve pipe and be scribed at
Grating on optical fiber, one end of optical fiber is fixed on the anchoring section of sleeve pipe, and the other end is free, sleeve pipe closed at both ends；
The many grating sensors of the long gauge length of described weldless 1 and fiber grating multi-point temp compensate aiding sensors 2 respectively with armour
Dress optical cable 4 connects, and draws in anchor pole 6, and described armored optical cable 4 is through among flexible plastic sleeve 5.
The manufacture method of above-mentioned a kind of multifunctional intellectual anchor pole, including following step:
(1) the weldless many grating sensors of long gauge length are made
(a1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；
(a2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, requires to design according to engineering test
The anchor points of each grating, and cut out multiple breach according to anchorage point on sleeve pipe, penetrate
With the single-mode fiber of multiple gratings, adjust the position of grating and sleeve pipe breach；
(a3) optical fiber two ends are applied certain prestressing force by traction apparatus, inject in sleeve pipe indentation, there solid simultaneously
Gum deposit water forms anchoring, traction apparatus is decontroled, thus encapsulate out containing the long mark of multiple continuous print after consolidation
Away from optical fiber grating sensing unit and the many grating sensors of long gauge length that do not have fusion point；
(a4) for each long gauge length optical fibre grating sensing unit, the two ends of the optical fiber in sleeve pipe are passed through respectively
Consolidation glue fixes with sleeve pipe, though the optical fiber of remainder is then contactless with internal surface of sleeve pipe or has slight
Contact, but frictional force is minimum negligible；
(a5) wrap up composite saturated ring epoxy resins further in set tube outside, carry out the long gauge length of weldless many
The integrative packaging of grating sensor itself is reinforced；
(2) make multi-point temp and compensate aiding sensors
(b1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；The Position Design of these gratings can be in the many grating sensors of gauge length long with weldless
Multiple grating one_to_one corresponding, or carry out temperature according to the thought carrying out temperature interpolation along rock-bolt length
Light filling grid Position Design；The wavelength of these gratings not only can not have phase in temperature compensation sensor
With, and the grating wavelength among the many grating sensors of gauge length long with weldless also can not have identical ripple
Long；
(b2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, closes with glue a layer of sleeve pipe,
Certain one end of the many gratings two ends tail optical fiber carved is cut short, is inserted in sleeve pipe so that it is in light
The position of grid is near certain position designed, and the tail optical fiber cutting short tail optical fiber side contracts in sleeve pipe
Portion and distance sleeve afterbody have certain distance, and this distance will not encounter the encapsulation of sleeve pipe afterbody with this tail optical fiber
Glue be principle, then at sleeve pipe two ends inject consolidate glue a little, be allowed to close formation one
The individual temperature compensation sensor containing multiple gratings.
(b3) for the optical fiber pigtail with multiple gratings being packaged in sleeve pipe, the contracting of its one end in sleeve pipe completely from
By, the other end is drawn with casing cement and as lead-out wire, and optical fiber can free skating completely in sleeve pipe
Dynamic；
(b4) wrap up composite saturated ring epoxy resins further in set tube outside, carry out temperature-compensating auxiliary and pass
The integrative packaging of sensor itself is reinforced；
(3) multifunctional intellectual anchor pole is made
(c1) entity anchor pole is selected, and along longitudinally opening a sulculus；Prepare the armored optical cable of two moderate length,
And be through among a diameter flexible plastic sleeve moderate with hardness, armored optical cable compares flexible plastic sleeve
Slightly longer, two is exposed；
(c2) long for the weldless the made many grating sensors of gauge length and temperature-compensating aiding sensors are fixed on anchor
In the sulculus that bar is left, and connect with armored optical cable respectively, draw in anchor pole；The long mark of weldless
The molten of melting welding is carried out respectively with armored optical cable away from many grating sensors and temperature-compensating aiding sensors
Plumb joint is positioned at anchor pole sulculus, and armored optical cable retains to have in sulculus and can play anchorage effect
Length, so after encapsulation, the stress of external cable is not result in internal sensor stress；
(c3) in anchor pole sulculus, long for the weldless many gratings of gauge length, to filling and leading up, are passed by injection ring epoxy resins or anchoring adhesive
Sensor and multi-point temp compensate aiding sensors and are packaged as a whole with anchor pole, are formed final multi-functional
Intelligent anchor rod.
The operation principle of the multifunctional intellectual anchor pole of the present invention is as follows: be by the long gauge length optical fibre light containing multiple sensing units
Within gate sensor is installed and is packaged in anchor pole, the strain that therefore anchor pole causes because of stress will be passed by long gauge length optical fibre grating
All sensing units of sensor catch, and owing to there being multiple sensing unit, therefore can capture the strain of anchor pole diverse location,
Then anchor pole is extrapolated in the stress of diverse location and carrying situation.Meanwhile, can be according to the long gauge length in rock-bolt length direction
Stress distribution, when disregarding its Bending Influence, it is possible to obtain its displacement in axial direction.From the point of view of country rock, special
The when of not being to excavate by means such as explosions for New Austrian Tunneling Method tunnel excavation etc., rock stratum can be made to occur a certain degree of broken
Broken, therefore add after anchor pole carries out supporting, at the ess-strain of different depth also by difference, the therefore intelligent anchor of the present invention
Bar more accurate can must reflect the unbalanced stress situation caused due to the internal Internal Force Redistribution in rock stratum, it is thus possible to accurate
The reflection real stress of anchor pole and carrying support conditions.Multiple intelligent anchor rods are arranged in the diverse location of country rock, can be used to
Monitoring the anchor pole carrying situation in this region, and surrounding rock supporting and stable case, this is extremely important to wall rock's level.
It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention,
Can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment
The clearest and the most definite each ingredient all can use prior art to be realized.
Claims (1)
1. the manufacture method of a multifunctional intellectual anchor pole, it is characterised in that: this multifunctional intellectual anchor pole includes weldless
The many grating sensors of long gauge length, fiber grating multi-point temp compensate aiding sensors, epoxy resin or anchoring adhesive, armouring light
Cable and flexible plastic sleeve；
The many grating sensors of the long gauge length of described weldless and fiber grating multi-point temp compensate aiding sensors and are arranged on anchor pole
Along the sulculus longitudinally opened, and encapsulated by epoxy resin or anchoring adhesive；
The many grating sensors of the long gauge length of described weldless include multiple long gauge length optical fibre grating sensing unit being sequentially connected in series, institute
State long gauge length optical fibre grating sensing unit and include sleeve pipe, the optical fiber being encapsulated in sleeve pipe and the grating being scribed on optical fiber, light
Fine two ends are separately fixed at the anchoring section of sleeve pipe；
Described fiber grating multi-point temp compensates aiding sensors and includes sleeve pipe, the optical fiber being encapsulated in sleeve pipe and be scribed at light
Grating on fibre, one end of optical fiber is fixed on the anchoring section of sleeve pipe, and the other end is free, sleeve pipe closed at both ends；
The many grating sensors of the long gauge length of described weldless and fiber grating multi-point temp compensate aiding sensors respectively with armouring
Optical cable connects, and draws in anchor pole, and described armored optical cable is through among flexible plastic sleeve；
The manufacture method of above-mentioned a kind of multifunctional intellectual anchor pole, including following step:
(1) the weldless many grating sensors of long gauge length are made
(a1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；
(a2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, requires to design according to engineering test
The anchor points of each grating, and cut out multiple breach according to anchorage point on sleeve pipe, penetrate
With the single-mode fiber of multiple gratings, adjust the position of grating and sleeve pipe breach；
(a3) optical fiber two ends are applied certain prestressing force by traction apparatus, inject in sleeve pipe indentation, there solid simultaneously
Gum deposit water forms anchoring, traction apparatus is decontroled, thus encapsulate out containing the long mark of multiple continuous print after consolidation
Away from optical fiber grating sensing unit and the many grating sensors of long gauge length that do not have fusion point；
(a4) for each long gauge length optical fibre grating sensing unit, the two ends of the optical fiber in sleeve pipe are passed through respectively
Consolidation glue fixes with sleeve pipe, though the optical fiber of remainder is then contactless with internal surface of sleeve pipe or has slight
Contact, but frictional force is minimum negligible；
(a5) wrap up composite saturated ring epoxy resins further in set tube outside, carry out the long gauge length of weldless many
The integrative packaging of grating sensor itself is reinforced；
(2) make multi-point temp and compensate aiding sensors
(b1) according to Practical Project Demand Design and inscribe a multiple determining deviation and different ripple on a single-mode fiber
Long grating；The Position Design of these gratings can be in the many grating sensors of gauge length long with weldless
Multiple grating one_to_one corresponding, or carry out temperature according to the thought carrying out temperature interpolation along rock-bolt length
Light filling grid Position Design；The wavelength of these gratings not only can not have phase in temperature compensation sensor
With, and the grating wavelength among the many grating sensors of gauge length long with weldless also can not have identical ripple
Long；
(b2) selecting a thin smooth sleeve pipe, interior relative aperture optical fiber is slightly thick, closes with glue a layer of sleeve pipe,
Certain one end of the many gratings two ends tail optical fiber carved is cut short, is inserted in sleeve pipe so that it is in light
The position of grid is near certain position designed, and the tail optical fiber cutting short tail optical fiber side contracts in sleeve pipe
Portion and distance sleeve afterbody have certain distance, and this distance will not encounter the encapsulation of sleeve pipe afterbody with this tail optical fiber
Glue be principle, then at sleeve pipe two ends inject consolidate glue a little, be allowed to close formation one
The individual temperature compensation sensor containing multiple gratings.
(b3) for the optical fiber pigtail with multiple gratings being packaged in sleeve pipe, the contracting of its one end in sleeve pipe completely from
By, the other end is drawn with casing cement and as lead-out wire, and optical fiber can free skating completely in sleeve pipe
Dynamic；
(b4) wrap up composite saturated ring epoxy resins further in set tube outside, carry out temperature-compensating auxiliary and pass
The integrative packaging of sensor itself is reinforced；
(3) multifunctional intellectual anchor pole is made
(c1) entity anchor pole is selected, and along longitudinally opening a sulculus；Prepare the armored optical cable of two moderate length,
And be through among a diameter flexible plastic sleeve moderate with hardness, armored optical cable compares flexible plastic sleeve
Slightly longer, two is exposed；
(c2) long for the weldless the made many grating sensors of gauge length and temperature-compensating aiding sensors are fixed on anchor
In the sulculus that bar is left, and connect with armored optical cable respectively, draw in anchor pole；The long mark of weldless
The molten of melting welding is carried out respectively with armored optical cable away from many grating sensors and temperature-compensating aiding sensors
Plumb joint is positioned at anchor pole sulculus, and armored optical cable retains to have in sulculus and can play anchorage effect
Length, so after encapsulation, the stress of external cable is not result in internal sensor stress；
(c3) in anchor pole sulculus, long for the weldless many gratings of gauge length, to filling and leading up, are passed by injection ring epoxy resins or anchoring adhesive
Sensor and multi-point temp compensate aiding sensors and are packaged as a whole with anchor pole, are formed final multi-functional
Intelligent anchor rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610560845.5A CN106017523A (en) | 2016-07-15 | 2016-07-15 | Method of making multifunctional smart anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610560845.5A CN106017523A (en) | 2016-07-15 | 2016-07-15 | Method of making multifunctional smart anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106017523A true CN106017523A (en) | 2016-10-12 |
Family
ID=57119080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610560845.5A Pending CN106017523A (en) | 2016-07-15 | 2016-07-15 | Method of making multifunctional smart anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106017523A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002070005A (en) * | 2000-08-28 | 2002-03-08 | Toa Grout Kogyo Co Ltd | Anchor |
| JP2002081061A (en) * | 2000-09-06 | 2002-03-22 | Se Corp | Load control method for ground anchor |
| CN2706739Y (en) * | 2004-05-10 | 2005-06-29 | 欧进萍 | Pre-stretching optical fiber raster big-scalar range strain sensor |
| CN102140796A (en) * | 2010-12-24 | 2011-08-03 | 大连理工大学 | Intelligent fiber reinforced plastic (FRP) anchor rod |
| CN203259281U (en) * | 2013-04-26 | 2013-10-30 | 中国矿业大学 | Coal mine downhole optical fiber raster multi-measuring point anchor pole stress measuring device |
| CN103604539A (en) * | 2013-05-10 | 2014-02-26 | 长安大学 | Design and manufacture of FBG sensing unit of miniature anchor rod and packaging method of optical fiber |
| CN204964080U (en) * | 2015-05-21 | 2016-01-13 | 昆明理工大学 | Side slope stock stress measuring transducer based on optic fibre bragg grating |
-
2016
- 2016-07-15 CN CN201610560845.5A patent/CN106017523A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002070005A (en) * | 2000-08-28 | 2002-03-08 | Toa Grout Kogyo Co Ltd | Anchor |
| JP2002081061A (en) * | 2000-09-06 | 2002-03-22 | Se Corp | Load control method for ground anchor |
| CN2706739Y (en) * | 2004-05-10 | 2005-06-29 | 欧进萍 | Pre-stretching optical fiber raster big-scalar range strain sensor |
| CN102140796A (en) * | 2010-12-24 | 2011-08-03 | 大连理工大学 | Intelligent fiber reinforced plastic (FRP) anchor rod |
| CN203259281U (en) * | 2013-04-26 | 2013-10-30 | 中国矿业大学 | Coal mine downhole optical fiber raster multi-measuring point anchor pole stress measuring device |
| CN103604539A (en) * | 2013-05-10 | 2014-02-26 | 长安大学 | Design and manufacture of FBG sensing unit of miniature anchor rod and packaging method of optical fiber |
| CN204964080U (en) * | 2015-05-21 | 2016-01-13 | 昆明理工大学 | Side slope stock stress measuring transducer based on optic fibre bragg grating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105971647B (en) | A kind of multi-functional FRP intelligent anchor rods of single-point temperature compensation and preparation method thereof | |
| CN105973285A (en) | Multifunctional intelligent anchor pole and installation arrangement method thereof | |
| Hong et al. | Recent progress of using Brillouin distributed fiber optic sensors for geotechnical health monitoring | |
| CN102140796B (en) | Intelligent fiber reinforced plastic (FRP) anchor rod | |
| CN106225818A (en) | A kind of single-point temperature compensation multifunctional intellectual anchor pole and installation distribution method thereof | |
| Hong et al. | Application of FBG sensors for geotechnical health monitoring, a review of sensor design, implementation methods and packaging techniques | |
| Wu et al. | Optical fiber-based sensing, measuring, and implementation methods for slope deformation monitoring: A review | |
| CN107907065B (en) | Slip surface sensing anchor rod and monitoring method thereof | |
| CN106092160A (en) | A kind of manufacture method of the multi-functional FRP intelligent anchor rod of multiple spot temperature compensation | |
| CN106225817A (en) | A kind of multi-functional FRP intelligent anchor rod of multiple spot temperature compensation | |
| Zhu et al. | An optical fibre monitoring system for evaluating the performance of a soil nailed slope | |
| CN105973286A (en) | Manufacturing method of single-point temperature compensation multifunctional intelligent anchor rod | |
| CN103821507B (en) | Shaft wall distortion distribution type fiber-optic detection method | |
| CN106247965A (en) | Tunnel surrounding monitoring method based on multifunctional intellectual anchor pole | |
| CN103512686A (en) | Static pressure high-strength prestressed concrete pipe pile body stress testing device | |
| CN205898165U (en) | Multi -functional intelligent stock | |
| CN203097917U (en) | Force-measuring rock bolt | |
| CN102445160A (en) | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors | |
| CN102809454A (en) | FBG (Fiber Bragg Grating) force measuring anchor rod and using method | |
| Ma et al. | A review of previous studies on the applications of fiber optic sensing technologies in geotechnical monitoring | |
| CN109029832A (en) | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor | |
| CN107402087A (en) | A kind of monitoring device and monitoring system of country rock three-dimensional turbulence stress field | |
| CN205895283U (en) | Multi -functional FRP intelligence stock of single -point temperature compensation | |
| CN203642880U (en) | Fiber bragg grating distributed displacement sensor monitoring inner deformation of side slope | |
| CN212454396U (en) | Underground strain distribution monitoring system based on distributed optical fiber sensing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
|
| RJ01 | Rejection of invention patent application after publication |