CN106441653B - A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method - Google Patents
A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method Download PDFInfo
- Publication number
- CN106441653B CN106441653B CN201610815469.XA CN201610815469A CN106441653B CN 106441653 B CN106441653 B CN 106441653B CN 201610815469 A CN201610815469 A CN 201610815469A CN 106441653 B CN106441653 B CN 106441653B
- Authority
- CN
- China
- Prior art keywords
- monitoring
- tunnel
- cut
- open
- strain
- 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.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 111
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000835 fiber Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 229920001651 Cyanoacrylate Polymers 0.000 claims description 4
- 239000004830 Super Glue Substances 0.000 claims description 4
- 238000013401 experimental design Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 238000013500 data storage Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical class [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lining And Supports For Tunnels (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method, this method has many advantages, such as that monitoring is accurate, it is convenient, easy to implement to obtain information.Comprising steps of being required to determine monitoring section according to content of the test, marked at prefabricated cut-and-cover tunnel surface design monitoring section；Each monitoring section designs monitoring element cloth according to content of the test and sets up an office；It lays radially, axially with hoop strain monitoring element, radial strain monitoring element is mounted on inside open cut tunnel model structure, by circumferential and axial strain monitoring element Surface Mount on open cut tunnel surface；Carry out impact open cut tunnel model test, monitoring open cut tunnel strain rule.
Description
Technical field
The present invention relates to a kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring methods.
Technical background
Investment along with China's rapid development of economy, from country to infrastructure construction is more and more, in Southwestern China
The Tunnel Engineering of area construction is increasing, and the disaster accident as caused by high gradient slope Dangerous Rock Body avalanche is on the rise.To Rolling Stone
The Disaster Study of open cut tunnel is impacted, geomechanical model test is a kind of effective means, and open cut tunnel is by effective monitoring of stress-strain
The important link that guarantee test effectively carries out.Fibre optical sensor has other traditional sensor institutes can not as emerging sensing technology
The advantage of substitution: (1) fiber-optic grating sensor is to transmit information by light wave reflection principle, and optical fiber is as optical fiber grating sensing
The carrier of device is the transmission medium of electrical isolation, therefore such sensor, not by the interference of extraneous electromagnetic field, itself is safe and reliable.
(2) corrosion-resistant, since there is coat on the surface of optical fiber, these coating substances are made of high molecular material, and this material can
The fibre optical sensor for using for a long time in the strong environment with chemical components such as soda acids, therefore having this characteristic is suitable for tying
The Long Period Health Monitoring of structure body.(3) measurement accuracy is high, and fibre optical sensor uses wavelength-modulation technique, and resolution ratio, which can reach, to be received
Meter level.Make the sensor of this technology that there is high sensitivity using the interference technique of optical fiber and light wave.(4) small in size.
Since the core of fibre optical sensor is the grating with certain wavelength, grating can generate wave when by external force or temperature change
Fiber grating can be made into the sensor of compact according to this characteristic by long variation.
Have certain R&D institutions at present and correlative study is carried out to Rolling Stone impact cut-and-cover tunnel, but majority takes in-situ test
With the method for numerical simulation, the former enforcement difficulty is larger, and the latter lacks certain reliability.Geomechanical model test can be kept away
Exempt from the above problem and is effectively studied.The present invention is proposed for the quasi- crag avalanche Rolling Stone impact open cut tunnel model test carried out
A kind of cut-and-cover tunnel model stress strain monitoring method, can effectively monitor shock response of the open cut tunnel to Rolling Stone.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems, provides a kind of geomechanical model test cut-and-cover tunnel model
Stress strain monitoring method, this method install strain monitoring element inside cut-and-cover tunnel model with surface, and Rolling Stone impacts open cut tunnel
Surface process, with circumferential direction due to that can be generated corresponding strain by impact force, what different monitoring points obtained is answered for open cut tunnel axial direction, radial direction
Parameter passes to Computer aided analysis according to by optical fiber, realizes research of the cut-and-cover tunnel to Rolling Stone shock response rule.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method, is arranged in cut-and-cover tunnel model
Multiple monitoring sections are equipped with axial, circumferential and radial monitoring element on each monitoring section to monitor the strain rule of open cut tunnel.
Further, the determination of the monitoring section requires to determine according to content of the test, the quantity including monitoring section
The position and.
Further, the monitoring section according to content of the test be designed to left and right sides haunch, two sides spandrel with
And totally 5 monitoring element cloth set up an office vault.
Further, the distribution method of radial strain monitoring element is as follows:
Cut-and-cover tunnel model is radially bored into aperture in each monitoring point, manually by monitoring element by stretching on the inside of open-cut tunnel structure
Outward, so that the circular shim of monitoring element is close to open cut tunnel inner surface, epoxide resin material is filled into drilling gap later, makes to supervise
It surveys element and open cut tunnel is fixed as an entirety.
Further, axial as follows with the distribution method of circumferential monitoring element:
Monitoring element is circumferentially attached to open cut tunnel surface, element with axial respectively at each monitoring point of cut-and-cover tunnel model
Both ends are fixed with super glue, uniformly smear epoxide resin material in monitoring element surface later, keep it Nian Jie with open cut tunnel surface.
It further, is bareing FBG fiber grating element for monitoring axial, circumferential monitoring element, element is with by force
Power glue is fixed, and uniformly smears epoxide resin material for monitoring for protection element on monitoring element surface.
Further, the radial monitoring element is for FBG fiber grating element radial strain sensor using package
The FB G fiber grating element of formula, bottom is Nian Jie with circular shim, and when burying, elder generation is according to experimental design by open-cut tunnel structure along diameter
To drilling, radial monitoring element is by stretching to outside on the inside of open-cut tunnel structure, circular shim is close to open cut tunnel inner surface, later by asphalt mixtures modified by epoxy resin
Rouge material fills drilling gap, and monitoring element and open cut tunnel is made to be fixed as an entirety.
Further, axial, the circumferential and radial monitoring element is stored with data and data processing equipment is connected.
Beneficial effects of the present invention:
The invention proposes open cut tunnel stress strain monitoring sides in a kind of Rolling Stone impact cut-and-cover tunnel geomechanical model test
Method, during Rolling Stone impacts open cut tunnel, the set up an office monitoring data of acquisition of each monitoring element cloth are transferred to data processing by optical fiber
Device, shock response rule of the comprehensive analysis open cut tunnel to Rolling Stone.Fiber grating element is safe and reliable, corrosion-resistant, small in size, measurement
Precision is high, can be used for effectively monitoring the strain rule of open cut tunnel.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is method implementation flow chart；
Fig. 2 is that monitoring element is installed rear open cut tunnel model schematic；
Fig. 3 is open cut tunnel model schematic after radial bore；
Wherein 1 open cut tunnel model；2 monitoring element cloth set up an office；3 monitoring sections；4 axial strain monitoring elements；5 radial strains prison
Survey element；6 hoop strain monitoring elements；7 drillings.
Specific embodiment
With reference to the accompanying drawing with certain under-traverse tunnel side slope crag avalanche Rolling Stone impact open cut tunnel geomechanical model test to this
Invention is described further.
As described in Fig. 2-3, Rolling Stone impacts open cut tunnel stress strain monitoring system in cut-and-cover tunnel geomechanical model test, packet
Include axial strain monitoring element 4, radial strain monitoring element 5 and hoop strain monitoring element 6；The axial strain monitors member
These data acquired are sent to data processing unit by part 4, radial strain monitoring element 5 and hoop strain monitoring element 6.
Axial strain monitoring element 4, radial strain monitoring element 5 and hoop strain monitoring element 6 pass through optical fiber for data
Data processing unit is given, data processing unit analyzes data collected.
Specific monitoring method, comprising the following steps:
Step (1) requires to determine monitoring section 3, including 3 quantity of monitoring section and design position according to content of the test, pre-
It is marked at the cut-and-cover tunnel surface design monitoring section 3 made；
The each monitoring section 3 of step (2) designs left and right sides haunch, two sides spandrel and vault totally 5 according to content of the test
A monitoring element cloth sets up an office 2；
Step (3) lays radial strain monitoring element 5, by cut-and-cover tunnel model 1 in each monitoring point radially drill straight diameter
For the drilling 7 of 1cm, manually monitoring element is close in open cut tunnel by stretching to outside, monitoring element circular shim on the inside of open-cut tunnel structure
Epoxide resin material is filled drilling gap later, monitoring element and open cut tunnel is made to be fixed as an entirety by surface；
Step (4) lays axial and circumferential monitoring element 4,6, will monitoring member at each monitoring point of cut-and-cover tunnel model 1
Part is circumferentially attached to open cut tunnel surface with axial respectively, and element both ends are fixed with super glue, uniform in monitoring element surface later
Epoxide resin material is smeared, it is Nian Jie with open cut tunnel surface to make it, and plays the role of protecting grating；
Step (5) carries out impact open cut tunnel model test, monitoring open cut tunnel strain rule.
Further, each monitoring section designs 5 monitoring element cloth and sets up an office, respectively two sides haunch, two sides spandrel with
And vault.
It further, is FBG fiber grating element, element super glue for monitoring axial, circumferential monitoring element
It is fixed, and epoxide resin material is uniformly smeared for monitoring for protection element on monitoring element surface.
Further, it is for FBG fiber grating element diameter that the radial monitoring element, which is the radial monitoring element,
The FBG fiber grating element of packaging type is used to strain transducer, bottom is Nian Jie with circular shim, when burying, first according to examination
It tests design open-cut tunnel structure radially drills, monitoring element is close in open cut tunnel by stretching to outside, circular shim on the inside of open-cut tunnel structure
Epoxide resin material is filled drilling gap later, monitoring element and open cut tunnel is made to be fixed as an entirety by surface.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (4)
1. a kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method, it is characterised in that: in cut-and-cover tunnel
The multiple monitoring sections of setting in model are equipped with axial, circumferential and radial monitoring element on each monitoring section to monitor open cut tunnel
Strain rule；
The distribution method of radial strain monitoring element is as follows:
Cut-and-cover tunnel model is radially bored into aperture in each monitoring point, it is manually that monitoring element is outer by stretching on the inside of open-cut tunnel structure
Side makes the circular shim of monitoring element be close to open cut tunnel inner surface, and epoxide resin material is filled drilling gap later, makes monitoring member
Part and open cut tunnel are fixed as an entirety；
It is axial as follows with the distribution method of circumferential monitoring element:
Monitoring element is circumferentially attached to open cut tunnel surface, element both ends with axial respectively at each monitoring point of cut-and-cover tunnel model
It is fixed with super glue, uniformly smears epoxide resin material in monitoring element surface later, keep it Nian Jie with open cut tunnel surface；
It is FBG fiber grating element for monitoring axial, circumferential monitoring element；
The radial monitoring element is the FBG optical fiber light that packaging type is used for FBG fiber grating element radial strain sensor
Grid element, bottom is Nian Jie with circular shim, and when burying, first open-cut tunnel structure is radially drilled according to experimental design, radial to supervise
It surveys element and is close to open cut tunnel inner surface by stretching to outside, circular shim on the inside of open-cut tunnel structure, epoxide resin material is filled into brill later
Hole gap makes monitoring element and open cut tunnel be fixed as an entirety.
2. geomechanical model test cut-and-cover tunnel model stress strain monitoring method as described in claim 1, feature exist
In:
The determination of the monitoring section requires determination, quantity and position including monitoring section according to content of the test.
3. geomechanical model test cut-and-cover tunnel model stress strain monitoring method as claimed in claim 1 or 2, feature
Be: each monitoring section is designed to left and right sides haunch, two sides spandrel and vault totally 5 prisons according to content of the test
Survey laying element point.
4. geomechanical model test cut-and-cover tunnel model stress strain monitoring method as claimed in claim 1 or 2, feature
Be: axial, the circumferential and radial monitoring element is connected with data storage and data processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815469.XA CN106441653B (en) | 2016-09-12 | 2016-09-12 | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815469.XA CN106441653B (en) | 2016-09-12 | 2016-09-12 | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106441653A CN106441653A (en) | 2017-02-22 |
| CN106441653B true CN106441653B (en) | 2019-06-14 |
Family
ID=58168860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610815469.XA Active CN106441653B (en) | 2016-09-12 | 2016-09-12 | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106441653B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764496A (en) * | 2017-09-12 | 2018-03-06 | 山东大学 | For simulating device, method and application of the rockfall motion to open cut tunnel impact |
| CN109781021A (en) * | 2019-01-22 | 2019-05-21 | 浙江工业大学 | The fiber-optic grating sensor predicted for real-time monitoring reinforcing bar surrounding concrete rust crack strain field in situ and rust crack |
| CN113008157A (en) * | 2021-04-26 | 2021-06-22 | 黄河勘测规划设计研究院有限公司 | Tunnel boring machine shield inner surface deformation monitoring method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713691A (en) * | 2009-12-22 | 2010-05-26 | 浙江大学 | Health-monitoring system of distributed sensing fiber tunnel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101106166B1 (en) * | 2009-06-25 | 2012-01-20 | (주)카이센 | Apparatus for measuring the radial movements and convergence of tunnel |
-
2016
- 2016-09-12 CN CN201610815469.XA patent/CN106441653B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713691A (en) * | 2009-12-22 | 2010-05-26 | 浙江大学 | Health-monitoring system of distributed sensing fiber tunnel |
Non-Patent Citations (4)
| Title |
|---|
| FBG传感器在隧道工程结构检测中的应用研究;张晨;《信息科技辑》;20080915(第9期);第三章 |
| 三向FBG 应变传感器及在隧道开挖模型试验中的应用研究;王静等;《工程地质学报》;20131231;全文 |
| 基于BOTDR的土质隧道深部围岩变形监测技术;尹龙等;《隧道建设》;20140228;第34卷(第2期);第158-161页 |
| 基于BOTDR的隧道应变监测与数值模拟;邱海涛等;《传感器与微系统》;20111231;第30卷(第12期);全文 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106441653A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10067030B2 (en) | Multifiber interrogation with reflectometry techniques | |
| CN102818665B (en) | Device and method for integrated collection of stress and displacement of surrounding rocks | |
| CN103454020B (en) | On-line monitoring method for surrounding rock stress based on fiber grating borehole stressometer | |
| CN103556992B (en) | A kind of acquisition methods of fiber grating geostatic stress | |
| CN106441653B (en) | A kind of geomechanical model test cut-and-cover tunnel model stress strain monitoring method | |
| CN106767476A (en) | A kind of slope stability monitoring and landslide early alarming and forecasting method based on all -fiber sensing network | |
| CN109141269B (en) | Distributed fiber grating hole wall strain gauge | |
| US9234999B2 (en) | System and method for making distributed measurements using fiber optic cable | |
| CN112031743B (en) | Underground fluid identification device and measurement method based on distributed optical fiber sensing technology | |
| CN109141271B (en) | Multi-point optical fiber grating hole bottom strain gauge | |
| CN102809454A (en) | FBG (Fiber Bragg Grating) force measuring anchor rod and using method | |
| CN101397902B (en) | Method for monitoring oil, water well sleeve axial strain by using optical fibre Brillouin sensor | |
| CN107402087A (en) | A kind of monitoring device and monitoring system of country rock three-dimensional turbulence stress field | |
| CN107356356A (en) | The fiber grating surrouding rock stress monitoring device and monitoring system of a kind of high-survival rate | |
| CN109579726A (en) | A kind of long gauge length distribution type fiber-optic Brillouin sensing-demodulating system and strain measurement method | |
| CN207074097U (en) | A kind of monitoring device and monitoring system of country rock three-dimensional turbulence stress field | |
| CN206725131U (en) | Semi-implantation type bottom hole fiber grating strain meter geostress survey device | |
| CN104501772A (en) | Device and method for monitoring differential settlement in portfolio for soil-stone combined region with hydraulic structure | |
| CN104897321B (en) | Wall shearing stress method of testing in a kind of pre-formed members concrete tubular pile pile body | |
| CN201561828U (en) | Fiber grating geological disaster monitor | |
| CN110424362B (en) | Optical fiber type temperature self-compensating static sounding sensor | |
| CN207248395U (en) | The fiber grating surrouding rock stress monitoring device and monitoring system of a kind of long term monitoring | |
| CN209085551U (en) | Multi-point type optical fiber grating bottom hole strain gauge | |
| CN210597256U (en) | Optical fiber type temperature self-compensation static sounding sensor | |
| CN106524959A (en) | System and method of monitoring stability of filling column body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |