CN108663016A - Tunnel subsidence monitoring device and tunnel subsidence monitoring method - Google Patents
Tunnel subsidence monitoring device and tunnel subsidence monitoring method Download PDFInfo
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- CN108663016A CN108663016A CN201810821657.2A CN201810821657A CN108663016A CN 108663016 A CN108663016 A CN 108663016A CN 201810821657 A CN201810821657 A CN 201810821657A CN 108663016 A CN108663016 A CN 108663016A
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- cathetometer
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- sedimentation
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- subsidence monitoring
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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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- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides a kind of tunnel subsidence monitoring device and tunnel subsidence monitoring methods.Wherein, tunnel subsidence monitoring device includes：The short transverse of multiple fiber grating cathetometers, side wall of multiple fiber grating cathetometers along tunnel is intervally fixed on side wall；Connecting tube, connecting tube will be sequentially connected at the top and bottom of adjacent fiber grating cathetometer, so as to form connectivity structure between fiber grating cathetometer；(FBG) demodulator, fiber grating cathetometer are connect with (FBG) demodulator, and (FBG) demodulator can receive and process the monitoring data of fiber grating cathetometer.The present invention solves the problems, such as that the precision of tunnel subsidence monitoring in the prior art is low.
Description
Technical field
The present invention relates to tunnel monitoring technical fields, heavy in particular to a kind of tunnel subsidence monitoring device and tunnel
Monitoring method drops.
Background technology
At present in constructing tunnel, the problem of side wall in generally existing tunnel sinks, in tunnel the sinking of side wall may cause
The significant security risk or accident in tunnel and surrounding building structure.It is directed to the monitoring sedimentation method in tunnel at present, mainly still adopts
It is taken time and effort, and cannot monitored in real time however, the monitoring needs of total powerstation manually monitor point by point with total powerstation personal monitoring, together
When, monitoring accuracy is related with the operation of staff, causes its measurement error larger, measurement accuracy is relatively low.
Invention content
The main purpose of the present invention is to provide a kind of tunnel subsidence monitoring device and tunnel subsidence monitoring methods, to solve
The low problem of the precision of tunnel subsidence in the prior art monitoring.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of tunnel subsidence monitoring device, packet
It includes：The short transverse of multiple fiber grating cathetometers, side wall of multiple fiber grating cathetometers along tunnel is intervally fixed on
On side wall；Connecting tube, connecting tube will be sequentially connected at the top and bottom of adjacent fiber grating cathetometer, so that fiber grating is high
Connectivity structure is formed between difference meter；(FBG) demodulator, fiber grating cathetometer are connect with (FBG) demodulator, and (FBG) demodulator can receive and process light
The monitoring data of fine grating cathetometer.
Further, fiber grating cathetometer includes：Babinet accommodates liquid in babinet, and the top and bottom of babinet are equal
It is open with connection, connecting tube is connected at least one connection opening；The bottom surface of the inside of tube body, tube body and babinet, which is fixed, to be connected
It connects, tube body has Packed cavity；Grating is strained, strain grating is contained in cavity, and is connect with the inner surface of tube body, and case is worked as
When internal liquid level changes, tube body deforms upon, and strain grating can incude deformation to generate strain signal, and will strain
Signal is conveyed to (FBG) demodulator.
Further, tube body is bellows.
Further, it is connect with a (FBG) demodulator after the strain grating of each fiber grating cathetometer is connected by optical cable.
Further, tunnel subsidence monitoring device further includes elastic sealing element, and elastic sealing element setting is highest in height
The connection opening at the top of fiber grating cathetometer, to be tightly connected opening.
Further, tunnel subsidence monitoring device further includes fixing piece, and fiber grating cathetometer is fixed on by fixing piece
On the wall surface in tunnel.
Further, all fiber grating cathetometers include：The top plate in feed flow cathetometer, feed flow cathetometer and tunnel connects
It connects；Benchmark cathetometer, benchmark cathetometer are connect with ground；At least one measurement cathetometer, the height for measuring cathetometer are located at confession
Between liquid cathetometer and benchmark cathetometer.
According to another aspect of the present invention, a kind of tunnel subsidence monitoring method is provided, is supervised using above-mentioned tunnel subsidence
Device is surveyed, method includes：After tunnel subsidence monitoring device is installed to the wall surface in tunnel, each of tunnel subsidence monitoring device is measured
The initial pressure value of a fiber grating cathetometer；When tunnel settles, according to the heavy of the fiber grating cathetometer after sedimentation
It is depressured force value and initial pressure value calculates the sedimentation value of sedimentation location；Sedimentation value is compared with default sedimentation value, with determination
Whether tunnel is safe.
Further, sedimentation position is calculated according to the settling pressure value of the fiber grating cathetometer after sedimentation and initial pressure value
The method for the sedimentation value set includes：According to the settling pressure value and initial pressure value of the feed flow cathetometer of tunnel subsidence monitoring device
It calculates due to error amount caused by fluid change；According to the settling pressure value of the benchmark cathetometer of tunnel subsidence monitoring device and just
Beginning pressure value, and error amount is combined, calculate the sedimentation value of the top plate in tunnel；According to the measurement cathetometer of tunnel subsidence monitoring device
Settling pressure value and initial pressure value, and combine the sedimentation value of error amount and top plate, calculate and measure cathetometer present position
Sedimentation value.
Further, the calculation of error amount h is as follows：
PA0-PA=ρ gh,
Wherein, PAFor the pressure value that the feed flow cathetometer after sedimentation measures, unit Pa, PA0For the feed flow height difference before sedimentation
The pressure value measured is counted, unit Pa, h are error amount, and unit is rice.
Further, the sedimentation value H of feed flow cathetometerCCalculation it is as follows：
PC0-PC=ρ g (HC+ h),
Wherein, PCFor the pressure value that the benchmark cathetometer after sedimentation measures, unit Pa, PC0For the benchmark height difference before sedimentation
Count the initial pressure value measured, unit Pa, HCThe sedimentation value of feed flow cathetometer present position, ρ are density, unit kg/m3, g
For acceleration of gravity, unit m/s2。
Further, the sedimentation value H of cathetometer present position is measuredBCalculation it is as follows：
PB0-PB=ρ g (HC+h-HB),
Wherein, PBFor the pressure value for measuring cathetometer and measuring after sedimentation, unit Pa, PB0For the measurement height difference before sedimentation
Count the initial pressure value measured, unit Pa, HBThe sedimentation value of cathetometer present position is measured, ρ is density, unit kg/m3, g
For acceleration of gravity, unit m/s2。
Further, when tunnel subsidence monitoring device being installed to the wall surface in tunnel, first by tunnel subsidence monitoring device
Fixing piece is fixed on the predeterminated position of the wall surface in tunnel, then connect the babinet of each fiber grating cathetometer with fixing piece respectively
And it fastens.
Further, when sedimentation value is more than default sedimentation value, there are risks in tunnel；Or when sedimentation value is less than or equal in advance
If when sedimentation value, tunnel safety.
It applies the technical scheme of the present invention, by the way that fiber grating cathetometer, and multiple light are arranged on the wall surface in tunnel
The short transverse of side wall of the fine grating cathetometer along tunnel is intervally fixed on side wall so that fiber grating cathetometer can
Accurate measurements tunnel.Above-mentioned set-up mode is monitored tunnel by fiber grating cathetometer, provides the prison of tunnel subsidence
Precision is surveyed, while the top plate or side wall in fiber grating cathetometer and tunnel connect so that fiber grating cathetometer can accurately be felt
The sedimentation that the top plate or side wall in tunnel should be arrived, further improves monitoring accuracy so that and monitoring is accurate, and reliability is high, and
It is monitored automatically using monitoring device, has saved manpower and materials.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the tunnel subsidence monitoring device of the present invention；
Fig. 2 shows the front and back contrast schematic diagrams of the tunnel subsidence monitoring device sedimentation in Fig. 1；And
Fig. 3 shows the structural schematic diagram of the fiber grating cathetometer of the tunnel subsidence monitoring device in Fig. 1.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, fiber grating cathetometer；11, babinet；12, tube body；13, grating is strained；14, feed flow cathetometer；15, benchmark is high
Difference meter；16, cathetometer is measured；20, connecting tube；30, (FBG) demodulator；40, fixing piece.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have and the application
The normally understood identical meanings of person of an ordinary skill in the technical field.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is typically needle
For direction shown in the drawings, or for component itself is on vertical, vertical or gravity direction；Equally
Ground for ease of understanding and describes, and " inside and outside " refers to the inside and outside of the profile relative to each component itself, but the above-mentioned noun of locality is not
For limiting the present invention.
Precision in order to solve the problems, such as tunnel subsidence monitoring in the prior art is low, and it is heavy that the present invention provides a kind of tunnels
Monitoring device and tunnel subsidence monitoring method drop.
A kind of tunnel subsidence monitoring device as depicted in figs. 1 and 2, including multiple fiber grating cathetometers 10, connecting tube
20 and (FBG) demodulator 30, the short transverse of side wall of multiple fiber grating cathetometers 10 along tunnel be intervally fixed on side wall；
The top and bottom of adjacent fiber grating cathetometer 10 are sequentially connected by connecting tube 20, so that between fiber grating cathetometer 10
Form connectivity structure；Fiber grating cathetometer 10 is connect with (FBG) demodulator 30, and (FBG) demodulator 30 can receive and process fiber grating height
The monitoring data of difference meter 10.
The present embodiment on the wall surface in tunnel by being arranged fiber grating cathetometer 10, and multiple fiber grating cathetometers
10 are intervally fixed on along the short transverse of the side wall in tunnel on side wall so that fiber grating cathetometer 10 being capable of accurate measurements
Tunnel.Above-mentioned set-up mode is monitored tunnel by fiber grating cathetometer 10, provides the monitoring accuracy of tunnel subsidence,
Fiber grating cathetometer 10 is connect with the top plate in tunnel or side wall simultaneously so that fiber grating cathetometer 10 can be sensed accurately
The sedimentation of the top plate or side wall in tunnel, further improves monitoring accuracy so that monitoring is accurate, and reliability is high, and uses
Monitoring device monitors automatically, has saved manpower and materials.
The short transverse of side wall of the present embodiment using multiple fiber grating cathetometers 10 along tunnel is spaced solid successively
The set-up mode being scheduled on side wall, to carry out settlement monitoring to the side wall in tunnel.
As shown in figure 3, fiber grating cathetometer 10 includes babinet 11, tube body 12 and strain grating 13, accommodated in babinet 11
There are liquid, the top and bottom of babinet 11 to all have connection opening, connecting tube 20 is connected at least one connection opening；Tube body 12
It is fixedly connected with the bottom surface of the inside of babinet 11, tube body 12 has Packed cavity；Strain grating 13 is contained in cavity, and with
The inner surface of tube body 12 connects, and when the liquid level in babinet 11 changes, tube body 12 deforms upon, and strain grating 13 can be felt
Deformation is answered to generate strain signal, and strain signal is conveyed to (FBG) demodulator 30.
Specifically, liquid is generally water, and tube body 12 is bellows, when fiber grating cathetometer 10 assembles first in babinet 11
It is injected with a certain amount of water, then there are one bellowss in the fixation of the bottom of babinet 11, and the both ends of bellows seal, in ripple
It is formed with closed cavity in pipe, strain grating 13 is fixed on the inner wall of 11 bottom wall of separate babinet of bellows, works as babinet
When liquid level in 11 changes, the water in babinet 11 also generates variation, effect of the bellows in pressure to the pressure of bellows
Lower generation deformation, strain grating 13 senses the stress variation of bellows and generates corresponding strain signal, and strain signal is defeated
It gives (FBG) demodulator 30 and carries out data analysis and process.
In the present embodiment, after the strain grating 13 of each fiber grating cathetometer 10 is connected by optical cable with a (FBG) demodulator
30 connections.Thus can by 30 analyzing processing of (FBG) demodulator it is all strain gratings 13 strain signals, reduce equipment at
This, is conveniently compared.
Optionally, tunnel subsidence monitoring device further includes elastic sealing element, and elastic sealing element is arranged in the highest light of height
The connection opening at the top of fine grating cathetometer 10, to be tightly connected opening.
Specifically, since the height of fiber grating cathetometer 10 is different, thus it is high in the highest fiber grating of height
The connection opening at the top of difference meter 10 is provided with elastic sealing element, and elastic sealing element is preferably rubber film, by the way that bullet is arranged
Property sealing element so that the inside of babinet 11 is separated with outside, while ensureing that the inside of babinet 11 is equal with the pressure of outside.
It should be noted that the highest fiber grating cathetometer of height in the present embodiment 10 one and only one, certainly,
It is identical and be the fiber grating cathetometer 10 of extreme higher position that multiple height can also be set, at this point, being each located at extreme higher position
The connection opening of fiber grating cathetometer 10 be required to be provided with elastic sealing element.
Optionally, tunnel subsidence monitoring device further includes fixing piece 40, and fiber grating cathetometer 10 is solid by fixing piece 40
It is scheduled on the wall surface in tunnel.
Preferably, fixing piece 40 is fixed hook, and the non-crotch end of fixed hook is squeezed into the side wall in tunnel, and crotch end is then
It is connect with babinet 11, babinet 11 is connect with the side wall in tunnel.When the length of the connecting tube 20 between babinet 11 is longer, it is
Influence of the connecting tube 20 to constructing tunnel is avoided, can be also equipped with fixing piece between connecting tube 20 and the side wall in tunnel
40, it is arranged in order to store connecting tube 20.
In the present embodiment, all fiber grating cathetometers 10 include feed flow cathetometer 14, benchmark cathetometer 15, at least one
A measurement cathetometer 16, feed flow cathetometer 14 is connect with the top plate in tunnel；Benchmark cathetometer 15 is connect with ground；Measure cathetometer
16 height is between feed flow cathetometer 14 and benchmark cathetometer 15.
Specifically, feed flow cathetometer 14 is connect with the top plate in tunnel, is provided in the connection opening of feed flow cathetometer 14
Rubber film cathetometer 15 and measures cathetometer 16 and carries out feed flow on the basis of feed flow cathetometer 14, so that benchmark cathetometer 15
Can be hydraulically full in cathetometer 16 with measuring, while feed flow cathetometer 14 can also monitor the sedimentation situation of tunnel roof, it is real
Existing comprehensive monitoring.Benchmark cathetometer 15 is arranged on the ground, and since the sedimentation value on ground is 0, thus benchmark cathetometer 15 can be with
As the measuring basis for measuring cathetometer 16 and feed flow cathetometer 14.Measure the sedimentation feelings that cathetometer 16 is the side wall for monitoring tunnel
The main body of condition, feed flow cathetometer 14 and benchmark cathetometer 15 only need setting one, measure cathetometer 16 and are usually provided with
It is multiple, it can be monitored with the different height of the side wall to tunnel, ensure the accurate comprehensive of monitoring.
The present embodiment additionally provides a kind of tunnel subsidence monitoring method, using above-mentioned tunnel subsidence monitoring device, method
Including：After tunnel subsidence monitoring device is installed to the wall surface in tunnel, each fiber grating of tunnel subsidence monitoring device is measured
The initial pressure value of cathetometer 10；When tunnel settles, according to the settling pressure of the fiber grating cathetometer 10 after sedimentation
Value and initial pressure value calculate the sedimentation value of sedimentation location；Sedimentation value is compared with default sedimentation value, to determine that tunnel is
No safety.
Specifically, when tunnel subsidence monitoring device to be installed to the wall surface in tunnel, first by tunnel subsidence monitoring device
Fixing piece 40 is fixed on the predeterminated position of the wall surface in tunnel, then the babinet 11 of each fiber grating cathetometer 10 and will need to fix
Connecting tube 20 connect and fasten with fixing piece 40 respectively, then by connect fiber grating cathetometer 10 optical cable be connected to (FBG) demodulator
On 30, the installation of tunnel subsidence monitoring device is completed.
It should be noted that the sedimentation value of above-mentioned initial pressure value, settling pressure value and sedimentation location is and calculates choosing
The fiber grating cathetometer 10 taken is relevant.For example, what if initial pressure value and settling pressure value chose is feed flow cathetometer 14
Obtained data are measured, then the sedimentation value for the sedimentation location being calculated is the sedimentation value of the top plate in tunnel, similarly, if
What initial pressure value and settling pressure value were chosen is to measure cathetometer 16 to measure obtained data, then the sedimentation position being calculated
The sedimentation value set is the sedimentation value of the position for the side wall for measuring the tunnel where cathetometer 16 chosen
The heavy of sedimentation location is calculated according to the settling pressure value of the fiber grating cathetometer 10 after sedimentation and initial pressure value
The method of depreciation includes：It is calculated according to the settling pressure value of the feed flow cathetometer 14 of tunnel subsidence monitoring device and initial pressure value
Due to error amount caused by fluid change；According to the settling pressure value of the benchmark cathetometer 15 of tunnel subsidence monitoring device and initially
Pressure value, and error amount is combined, calculate the sedimentation value of the top plate in tunnel；According to the measurement cathetometer 16 of tunnel subsidence monitoring device
Settling pressure value and initial pressure value, and combine the sedimentation value of error amount and top plate, calculate and measure cathetometer 16 present position
Sedimentation value.When calculating, first calculate since liquid level caused by other factors declines the error amount generated, to be counted to guarantee
The accuracy of the sedimentation value arrived.
The calculation of error amount h is as follows：
PA0-PA=ρ gh,
Wherein, PAFor the pressure value that the feed flow cathetometer 14 after sedimentation measures, unit Pa, PA0It is high for the feed flow before sedimentation
The pressure value that difference meter 14 measures, unit Pa, h are error amount, and unit is rice.Error amount h is obtained with this.
The sedimentation value H of feed flow cathetometer 14CCalculation it is as follows：
PC0-PC=ρ g (HC+ h),
Wherein, PCFor the pressure value that the benchmark cathetometer 15 after sedimentation measures, unit Pa, PC0It is high for the benchmark before sedimentation
The initial pressure value that difference meter 15 measures, unit Pa, HCThe sedimentation value of 14 present position of feed flow cathetometer, ρ are density, and unit is
kg/m3, g is acceleration of gravity, unit m/s2。
Measure the sedimentation value H of 16 present position of cathetometerBCalculation it is as follows：
PB0-PB=ρ g (HC+h-HB),
Wherein, PBFor the pressure value for measuring cathetometer 16 and measuring after sedimentation, unit Pa, PB0It is high for the measurement before sedimentation
The initial pressure value that difference meter 16 measures, unit Pa, HBThe sedimentation value of 16 present position of cathetometer is measured, ρ is density, and unit is
kg/m3, g is acceleration of gravity, unit m/s2。
It should be noted that above-mentioned HBAnd HCIt is the practical sedimentation value of corresponding position, i.e., only includes due to tunnel subsidence
And the sedimentation value generated, the error amount not generated including fluid change, and h, HBAnd HCTo fall to positive value, it is to increase
Negative value.Above-mentioned pressure value be strain grating 13 and the feed flow cathetometer 14 of corresponding fiber grating cathetometer 10 liquid level it
Between hydraulic pressure.
After the sedimentation value of corresponding position is calculated by above-mentioned formula, by the sedimentation value being calculated and default sedimentation value
It is compared, when sedimentation value is more than default sedimentation value, there are risks in tunnel；When sedimentation value is less than or equal to default sedimentation value,
Tunnel safety.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
1, solve the problems, such as that the precision of tunnel subsidence monitoring in the prior art is low；
2, using FBG monitoring technology, tunnel subsidence can be monitored in real time, Feasible degree is high；
3, the structure of tunnel subsidence monitoring device is simple, measurement data is accurate, strong antijamming capability.
Obviously, above-mentioned described embodiment only a part of the embodiments of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiment should all belong to the scope of protection of the invention.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, work, device, component and/or combination thereof.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so that presently filed embodiment described herein can be in addition to illustrating herein
Or the sequence other than those of description is implemented.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of tunnel subsidence monitoring device, which is characterized in that including：
Multiple fiber grating cathetometers (10), the short transverse of side wall of multiple fiber grating cathetometers (10) along tunnel according to
Minor tick is fixed on the side wall；
Connecting tube (20), the connecting tube (20) connect the top and bottom of the adjacent fiber grating cathetometer (10) successively
It connects, so as to form connectivity structure between the fiber grating cathetometer (10)；
(FBG) demodulator (30), the fiber grating cathetometer (10) connect with the (FBG) demodulator (30), and the (FBG) demodulator (30) can
Receive and process the monitoring data of the fiber grating cathetometer (10).
2. tunnel subsidence monitoring device according to claim 1, which is characterized in that fiber grating cathetometer (10) packet
It includes：
Babinet (11), the babinet (11) is interior to accommodate liquid, and connection opening is all had at the top and bottom of the babinet (11),
The connecting tube (20) connects at least one connection opening；
Tube body (12), the tube body (12) are fixedly connected with the bottom surface of the inside of the babinet (11), and the tube body (12) has
The cavity of sealing；
Grating (13) is strained, the strain grating (13) is contained in the cavity, and connects with the inner surface of the tube body (12)
It connects, when the liquid level in the babinet (11) changes, the tube body (12) deforms upon, and the strain grating (13) can
The deformation is incuded to generate strain signal, and the strain signal is conveyed to the (FBG) demodulator (30).
3. tunnel subsidence monitoring device according to claim 2, which is characterized in that the tube body (12) is bellows.
4. tunnel subsidence monitoring device according to claim 2, which is characterized in that each fiber grating cathetometer (10)
Strain grating (13) connected by optical cable after connect with a (FBG) demodulator (30).
5. tunnel subsidence monitoring device according to claim 2, which is characterized in that the tunnel subsidence monitoring device is also wrapped
Include elastic sealing element, connection of the elastic sealing element setting at the top of the highest fiber grating cathetometer (10) of height
Opening is open with sealing the connection.
6. tunnel subsidence monitoring device according to claim 1, which is characterized in that the tunnel subsidence monitoring device is also wrapped
Fixing piece (40) is included, the fiber grating cathetometer (10) is fixed on by the fixing piece (40) on the wall surface in the tunnel.
7. tunnel subsidence monitoring device according to any one of claim 1 to 6, which is characterized in that all optical fiber
Grating cathetometer (10) includes：
Feed flow cathetometer (14), the feed flow cathetometer (14) connect with the top plate in the tunnel；
Benchmark cathetometer (15), the benchmark cathetometer (15) connect with ground；
At least one measurement cathetometer (16), the height for measuring cathetometer (16) are located at the feed flow cathetometer (14) and institute
It states between benchmark cathetometer (15).
8. a kind of tunnel subsidence monitoring method, which is characterized in that using the tunnel subsidence described in any one of claim 1 to 7
Monitoring device, the method includes：
After the tunnel subsidence monitoring device is installed to the wall surface in tunnel, each light of the tunnel subsidence monitoring device is measured
The initial pressure value of fine grating cathetometer (10)；
When tunnel settles, according to the settling pressure value of the fiber grating cathetometer (10) after sedimentation and described initial
Pressure value calculates the sedimentation value of sedimentation location；
The sedimentation value is compared with default sedimentation value, it is whether safe with the determination tunnel.
9. tunnel subsidence monitoring method according to claim 8, which is characterized in that according to the fiber grating after sedimentation
The method that the settling pressure value of cathetometer (10) and the initial pressure value calculate the sedimentation value of sedimentation location includes：
According to the settling pressure value of the feed flow cathetometer (14) of the tunnel subsidence monitoring device and initial pressure value calculate due to
Error amount caused by fluid change；
According to the settling pressure value and initial pressure value of the benchmark cathetometer (15) of the tunnel subsidence monitoring device, and combine institute
Error amount is stated, the sedimentation value of the top plate in the tunnel is calculated；
According to the settling pressure value and initial pressure value of the measurement cathetometer (16) of the tunnel subsidence monitoring device, and combine institute
The sedimentation value of error amount and the top plate is stated, the sedimentation value for measuring cathetometer (16) present position is calculated.
10. tunnel subsidence monitoring method according to claim 9, which is characterized in that the calculation of the error amount h is such as
Under：
PA0-PA=ρ gh,
Wherein, PAFor the pressure value that the feed flow cathetometer (14) after sedimentation measures, unit Pa, PA0Described in before sedimentation
The pressure value that feed flow cathetometer (14) measures, unit Pa, h are the error amount, and unit is rice.
11. tunnel subsidence monitoring method according to claim 10, which is characterized in that the feed flow cathetometer (14) is sunk
Depreciation HCCalculation it is as follows：
PC0-PC=ρ g (HC+ h),
Wherein, PCFor the pressure value that the benchmark cathetometer (15) after sedimentation measures, unit Pa, PC0Described in before sedimentation
The initial pressure value that benchmark cathetometer (15) measures, unit Pa, HCThe sedimentation value of feed flow cathetometer (14) present position,
ρ is density, unit kg/m3, g is acceleration of gravity, unit m/s2。
12. tunnel subsidence monitoring method according to claim 11, which is characterized in that the measurement cathetometer (16) is residing
The sedimentation value H of positionBCalculation it is as follows：
PB0-PB=ρ g (HC+h-HB),
Wherein, PBFor the pressure value that the measurement cathetometer (16) after sedimentation measures, unit Pa, PB0Described in before sedimentation
Measure the initial pressure value that cathetometer (16) measures, unit Pa, HBThe sedimentation value for measuring cathetometer (16) present position,
ρ is density, unit kg/m3, g is acceleration of gravity, unit m/s2。
13. tunnel subsidence monitoring method according to claim 8, which is characterized in that by the tunnel subsidence monitoring device
When being installed to the wall surface in tunnel, the fixing piece (40) of the tunnel subsidence monitoring device is first fixed on to the wall surface in the tunnel
The babinet (11) of each fiber grating cathetometer (10) is then connect with the fixing piece (40) and tight by predeterminated position respectively
Gu.
14. tunnel subsidence monitoring method according to claim 8, which is characterized in that
When the sedimentation value is more than the default sedimentation value, there are risks in the tunnel；Or
When the sedimentation value is less than or equal to the default sedimentation value, the tunnel safety.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110470273A (en) * | 2019-09-19 | 2019-11-19 | 河南理工大学 | A kind of back sinking measurement ball monitoring method based on pressure difference |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470273A (en) * | 2019-09-19 | 2019-11-19 | 河南理工大学 | A kind of back sinking measurement ball monitoring method based on pressure difference |
| CN110470273B (en) * | 2019-09-19 | 2021-07-09 | 河南理工大学 | Roadway roof subsidence measuring ball monitoring method based on pressure difference |
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