CN101430193A - Displacement transducer for tunnel perimeter surface - Google Patents
Displacement transducer for tunnel perimeter surface Download PDFInfo
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- CN101430193A CN101430193A CNA2008101478405A CN200810147840A CN101430193A CN 101430193 A CN101430193 A CN 101430193A CN A2008101478405 A CNA2008101478405 A CN A2008101478405A CN 200810147840 A CN200810147840 A CN 200810147840A CN 101430193 A CN101430193 A CN 101430193A
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- tunnel
- monitoring
- perimeter surface
- optical fiber
- displacement transducer
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- Excavating Of Shafts Or Tunnels (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
A tunnel perimeter surface displacement pickup belongs to the technical field of tunnel excavation monitoring. The displacement pickup is an optical fiber type displacement pickup which is composed of a bar base plate and optical fiber cables which are fixedly arranged on the upper and the lower surfaces of the base plate along the length direction of the bar base plate. The displacement pickup has the advantages that the measured points are not easy to damage, communication optical fibers are adopted as a measuring point element and a transmission medium on the whole, the structure is simple, and the cost is low; no restriction requirement is available for the testing environment such as the magnetic field, the shock, the water, the wind, the visibility and the particulate loading in air and the like at the monitoring place. The tunnel perimeter surface displacement pickup not only can be used for surface relative displacement monitoring of the substances with other structures, but also can be used for the construction monitoring or operation monitoring of peripheral surface displacement of tunnel and underground construction of railway, public road, hydroelectric power, subway, municipality, etc.
Description
Technical field
The present invention relates to a kind of displacement transducer that the tunnel perimeter surface displacement is used of monitoring.Belong to tunnel perimeter surface displacement monitoring technical field.
Background technology
The tunnel perimeter surface displacement monitor mainly contains convergence gauge, total powerstation tunnel perimeter deflection measurement system, Ba Saite collective system (Bassett Convergence System) etc. at present.
Convergence gauge is made up of displacement readings device and measurement chi.Its principle is that a measuring point respectively is set on the abutment wall of both sides, tunnel, sustained height.One end of chi connects one of them measuring point, and the other end connects an end of convergence gauge, and the other end of convergence gauge is connected with another measuring point.When between two measuring points during variable in distance, be constant owing to measure the length of chi in measuring, the difference of the reading in twice measurement on the convergence gauge is exactly the convergent deformation amount of two measuring point place tunnel wall between twice measurement.This convergence gauge is served as displacement transducer with the measurement chi, and its shortcoming is that requirement is blocked tunnel traffic, measuring point protection difficulty, can't be realized real-time monitoring when measuring.
Total powerstation tunnel perimeter deflection measurement system is served as displacement transducer by the some retroreflective sheetings that are marked with "+" word target center.Its principle is, the point that need observe at tunnel perimeter surface is laid retroreflective sheeting and served as measuring point, in the appropriate location, tunnel total powerstation is set.Utilize total station survey to go out the coordinate of the relative total powerstation of each measuring point, calculate the relative distance between any two measuring points then, promptly obtain the variation of distance between any two measuring points, i.e. the convergent deformation amount of two measuring point place tunnel wall by twice measurement.Its shortcoming is, during monitoring total powerstation will be with all measuring point intervisibilities, avoid vibrations, the traffic that this can influence the measuring point place hole in is difficult to realize continuous monitoring, also there is the shortcoming of measuring point destructible in the while, manually to the target difficulty.
The Ba Saite collective system is a kind of tunnel section convergence automatic measurer that U.S. SLOPE INDICATOR company releases, referring to 2000 " dam safety monitoring Professional Committee annual meeting of China's Hydropower Engineering society and seminar collection of thesis " " Ba Saite collective system and application thereof ", this system was made up of DATA REASONING, data acquisition and data processing three parts.Its DATA REASONING part is made up of the some groups of electrolyte obliquity sensors that are hinged with long and short rod member, and the long and short rod member that is hinged by cover head and the tail during use is installed around section to be measured hole wall, constitutes a ring.After tunnel perimeter surface is subjected to displacement, can drive the length rod member and rotate, measure its corner by obliquity sensor, and this angular signal is exported to the data acquisition controller (MCU) of being served as by a CR10.The data that collected by CR10 are sent in the PC of inserting special-purpose handling procedure again carries out data processing, utilizes these corners and length of connecting rod to calculate the tunnel perimeter surface displacement.The major defect of this displacement transducer of being made up of the some groups of electrolyte obliquity sensors that are hinged with long and short rod member is that measuring point is subject to the destruction or the influence construction of construction and excavation explosion and construction machinery; In order to reduce the taking of space, the quantity of its bar must be abundant, and this can increase the cumulative errors and the cost of number of sensors, periphery surface displacement simultaneously greatly.
Summary of the invention
The objective of the invention is in order to overcome the above-mentioned shortcoming of prior art, provide a kind of measuring point to be difficult for the displacement transducer for tunnel perimeter surface of destroyed, constructing tunnel operation and the mutually noninterfere of surface displacement monitoring results.
Displacement transducer for tunnel perimeter surface of the present invention is the optical fiber type displacement transducer, is made of bar shaped substrate, the upper and lower lip-deep optical fiber cable that is installed in substrate along the length direction of bar shaped substrate.
During use this bar shaped substrate is fixed on the tunnel perimeter wall along tunnel cross-section.When tunnel perimeter surface is subjected to displacement, then can drive the bar shaped substrate that is fixed on the tunnel perimeter surface and produce distortion, the bar shaped substrate deformation causes the optical fiber cable generation strain on its upper and lower surface.The strain value of this optical fiber cable is then by supporting fiber data collector real-time automatic collecting, and these Monitoring Data are preserved or send to the fibre strain data processor, by data processor these strain values are carried out the changing value that analytical calculation just can obtain relative position between any 2 of the substrate in conjunction with substrate thickness through the software program of special use, the changing value of substrate each point is exactly the shift value of the tunnel perimeter surface that is in contact with it.
Compared with the aforementioned existing similar products, the invention has the beneficial effects as follows: measuring point is difficult for destroyed, all adopts communication optical fiber to be measuring point element and transmission medium, and simple in structure, cost is low; Test environment requirements without limits such as magnetic field, vibrations, water, wind, visibility, airborne fraction of particle to the monitoring place.Remove the construction monitoring or the operation monitoring of the periphery surface displacement of the tunnel can be used for railway, highway, water power, subway, municipal administration etc. and underground works, also can be used for the surperficial relative displacement monitoring of other works.
Content of the present invention further illustrates with the following Examples, but content of the present invention is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the left view of Fig. 1
Fig. 3 is the vertical view of Fig. 1
Fig. 4 is the structural representation that is provided with the displacement transducer of protective seam
Fig. 5 is the synoptic diagram of installing and using of the present invention
Embodiment
Referring to 1～3, this displacement transducer for tunnel perimeter surface is made of bar shaped substrate 1, the upper and lower lip-deep optical fiber cable 2 that is installed in substrate along the length direction of bar shaped substrate.3 for installing through hole among the figure.Optical fiber cable 2 can be bonded on the bar shaped substrate with bonding agent.Certainly, also can adopt some other not influence the normal strain of optical fiber cable and other fixed form of transmission signals.
Referring to 4, be not destroyed the layer protective layer 4 of on optical fiber cable, can also screening in order to guarantee measuring point better.Protective seam can be rubber sheet or plastic sheet.Can also utilize the concrete that sprays to tunnel surface in the constructing tunnel process to come optical fiber cable is further protected.
Optical fiber cable can respectively be arranged two, upper and lowerly respectively stays one as standby.
During use this bar shaped substrate is arranged along tunnel cross-section,, with expansion bolt 5 or alternate manner substrate is fixed on the tunnel perimeter wall 6 at a certain distance referring to Fig. 5.Optical fiber cable 2 and supporting fiber data collector 7 are joined, just the strain data of optical fiber can be sent to the shift value that fibre strain data processor 8 obtains the tunnel perimeter of correspondence.
Claims (4)
1, displacement transducer for tunnel perimeter surface is characterized in that described displacement transducer is the optical fiber type displacement transducer, and this optical fiber type displacement transducer is made of bar shaped substrate, the upper and lower lip-deep optical fiber cable that is fixedly arranged on substrate along the length direction of bar shaped substrate.
2, displacement transducer for tunnel perimeter surface as claimed in claim 1 is characterized in that being provided with a protective seam on described optical fiber cable.
3, displacement transducer for tunnel perimeter surface as claimed in claim 2 is characterized in that described protective seam is a rubber sheet.
4, displacement transducer for tunnel perimeter surface as claimed in claim 2 is characterized in that described protective seam is a plastic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101478405A CN101430193A (en) | 2008-12-12 | 2008-12-12 | Displacement transducer for tunnel perimeter surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101478405A CN101430193A (en) | 2008-12-12 | 2008-12-12 | Displacement transducer for tunnel perimeter surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101430193A true CN101430193A (en) | 2009-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101478405A Pending CN101430193A (en) | 2008-12-12 | 2008-12-12 | Displacement transducer for tunnel perimeter surface |
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| CN (1) | CN101430193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776809A (en) * | 2015-03-28 | 2015-07-15 | 四川金码科技有限公司 | Target body surface deformation detection device based on deforming strip |
-
2008
- 2008-12-12 CN CNA2008101478405A patent/CN101430193A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776809A (en) * | 2015-03-28 | 2015-07-15 | 四川金码科技有限公司 | Target body surface deformation detection device based on deforming strip |
| CN104776809B (en) * | 2015-03-28 | 2017-11-24 | 四川金码科技有限公司 | Target surface device for detecting deformation based on modified strip |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |