CN209470718U - A kind of fibre system being preset in shield tunnel - Google Patents
A kind of fibre system being preset in shield tunnel Download PDFInfo
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- CN209470718U CN209470718U CN201920372832.4U CN201920372832U CN209470718U CN 209470718 U CN209470718 U CN 209470718U CN 201920372832 U CN201920372832 U CN 201920372832U CN 209470718 U CN209470718 U CN 209470718U
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- optical fiber
- composite cable
- shield tunnel
- shield
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Abstract
The utility model relates to a kind of fibre systems being preset in shield tunnel, including composite cable and modem, tunnel track is assembled by shield duct piece (3), the composite cable is anchored on the shield duct piece (3) spliced, distributed fiberoptic sensor is equipped in the composite cable, the modem is connect with composite cable, and the lightwave signal for changing in composite cable is the electric signal for characterizing shield tunnel deformation, the composite cable includes circumferentially disposed section (1) and is longitudinally arranged section (2), circumferential coiling one of circumferentially disposed section (1) along tunnel encloses and is connected to next circumferentially disposed section (1) by being longitudinally arranged section (2).Compared with prior art, the utility model is applicable to the shield tunnel of different seam types and section of jurisdiction shape, is conducive to fibre optical sensor acquisition signal, optical fiber structure is reliable and stable, and work progress is simple and easy to do.
Description
Technical field
The utility model relates to Tunnel testing technical fields, more particularly, to a kind of optical fiber system being preset in shield tunnel
System.
Background technique
With the continuous increase of urban transportation geostatic pressure, more and more rail traffics are the shadow avoided to ground environment
Ring and constructed using shield method, and shield tunnel is often in the inhomogeneous formation of stress complexity, be also easy to produce differential settlement,
The problems such as lateral convergent deformation, affects the normal service performance in tunnel, even causes safety accident when serious, thus uses
Certain monitoring means ensures that the health operation of tunnel structure is just particularly important.
Currently, being broadly divided into point type monitoring and Distributed Detection to shield tunnel monitoring means.Point type detection is using tradition
Stress, strain transducer, emphasis detects the performance indicator of several specific positions of several sections, lays more multiple
It is miscellaneous, it is easily affected by environment, the variation tendency of tunnel duct piece entirety cannot be described.Distributed Detection mainly uses Fibre Optical Sensor skill
Art can monitor the performance indicator along optical fiber everywhere in upper tunnel, realize the measurement that measured structure refines comprehensively, compare point type
Measurement more meets requirement of engineering.But distribution type fiber-optic is measured, common silica fibre is thin and delicate easy to break, and survival rate is low, and existing
Formula optical fiber measurement mode is distributed in shield tunnel often because track structure layer hinders, can not achieve tunneling boring arrangement.
Utility model content
The purpose of this utility model is exactly to provide one kind in order to overcome the problems of the above-mentioned prior art and be preset in shield
Fibre system in structure tunnel.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of fibre system being preset in shield tunnel, including composite cable and modem, tunnel track is by shield
Structure pipe sheet assembling forms, and the composite cable is anchored on the shield duct piece spliced, is equipped with and divides in the composite cable
Cloth fibre optical sensor, the modem are connect with composite cable, and for changing the lightwave signal in composite cable
For the electric signal for characterizing shield tunnel deformation, the composite cable includes circumferentially disposed section and is longitudinally arranged section, the ring
Circumferential coiling one to arrangement section along tunnel encloses and is connected to next circumferentially disposed section by being longitudinally arranged section.I.e. in cross section
On arranged along wholecircle, arranged on vertical section along the straight line that elevation is higher than track structure layer, and be arranged and mitigate turning and redundant line
Ring.Distributed optical fiber sensing system principle is to use optical fibers as sensing responsive element and transmission signal media simultaneously, using elder generation
Into otdr technology and ofdr technology, detect the temperature along optical fiber different location and the variation of strain, realize really distribution
The measurement of formula.Sensing element in distributed optical fiber sensing system is only optical fiber, and one-shot measurement can obtain entire fiber region
The one-dimensional distribution map being measured in domain, is set as raster-like for optical fibre frame, so that it may measured two and three dimensions distribution situation is measured,
Ofdr technology space resolution ratio can reach millimeter magnitude.
Further, the top for being longitudinally arranged section and being set to track structure layer.
Further, described circumferentially disposed section be longitudinally arranged Duan Jun include the anchoring cartridge being arranged from outside to inside, sheath,
Intensive aspect and optical fiber light core, the sheath are metal mesh shield layer, and the intensive aspect is to surround to be arranged in outside optical fiber light core
The rigid metal wire enclosed.The sheath is that anchoring cartridge connects with fixed duct, and composite cable and shield tunnel are anchored.
Further, the intensive aspect is the metal reinforcement of multiply sleeve, at base cord structures.
Further, it is coated with epoxy resin on the anchoring cartridge outer surface, and wraps up flexible HDPE geomembrane.
Further, catadioptric covering is enclosed on the outside of the optical fiber light core.
Further, the optical fiber light core is plastic optical fiber.
Further, the optical fiber light core is polymethyl methacrylate optical fiber.
Compared with prior art, the utility model has the advantage that
1) applied widely.This system can be used for the shield tunnel of different seam types and section of jurisdiction shape, be suitable for the fissure of displacement
With the shield tunnel of diameter each under through seam assembling mode.The multi-level cable stable structure antidetonation of use, can meet with train
Test under conditions of the vibration such as vibration, earthquake.In addition, if can be adapted for other in the case where fluting apertures conditions meet and construct
Object surface monitoring.
2) acquisition information multiplicity.This system meets the test request of distribution type fiber-optic, can be according to demand at circumferentially disposed section
Be longitudinally arranged the sensor that needs are set on any position of section, can the strain of testing tunnel cross section section of jurisdiction simultaneously, displacement,
The physical quantitys such as fracture width and longitudinal strain, displacement.Under same test, compare simple and easy for point type is arranged.
3) total system stability is strong.Optical fiber is protected using four layers of cored means, shields extraneous magnetoelectricity, corrosion
The interference to optical fiber such as object, water, oil, the plastic optical fiber of use compare conventional quartz optical fiber, and core diameter is big, the coupling effect of light
Rate is high, and transmittability is strong and transmission is stablized, and the circular curve overflexing section of use is walked and avoids right angle from bending upwards, overcomes bending
The disconnection phenomenon of generation, while redundancy wire loop is arranged can reconnect under extreme condition after opening, meet both-end and connect in generating unit disjunction
Enter condition, guarantees the normal operation of test macro to the full extent.
4) little interference by environment replaces traditional silica fibre using plastic optical fiber, makes optical fiber ductility, toughness, bending resistance
Folding endurance greatly improves.Meanwhile the anti-draw strength of simple optical fiber is improved with intensive aspect and sheath, with epoxy resin and flexibility
The working environment of HDPE geomembrane protection composite cable.Under the above multiple-protection, composite cable can resist such as coagulation in construction
Soil such as whitewash, pours, vibrating at the impact of the processes to cable line, ensure that optical fibre channel normal work.
Detailed description of the invention
Fig. 1 is the optimal crosssection figure for the fibre system being preset in shield tunnel in the utility model；
Fig. 2 is the vertical section layout drawing for the fibre system being preset in shield tunnel in the utility model；
Fig. 3 is the structural map of composite cable in the utility model；
Fig. 4 is the specific implementation process of the utility model.
Circumferentially disposed section of 1-；2- is longitudinally arranged section；3- shield duct piece；4- track structure layer；5- redundancy wire loop；6- anchoring
Set；7- sheath；8- optical fiber light core；9- intensive aspect.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
A kind of fibre system being preset in shield tunnel, including composite cable and modem, tunnel track is by shield
Structure section of jurisdiction 3 is assembled, and the composite cable is anchored on the shield duct piece 3 spliced, is equipped in the composite cable
Distributed fiberoptic sensor, the modem are connect with composite cable, and for changing the letter of the light wave in composite cable
Number for characterization shield tunnel deformation electric signal, the composite cable includes circumferentially disposed section 1 and being longitudinally arranged section 2, described
Circumferentially disposed section 1 along tunnel circumferential coiling one enclose and be connected to next circumferentially disposed section 1 by being longitudinally arranged section 2.I.e.
It arranges, is arranged on vertical section along the straight line that elevation is higher than track structure layer 4, and be arranged and mitigate turning along wholecircle on cross section
And redundancy wire loop 5, referring to fig. 2.When it is implemented, being longitudinally arranged the top that section 2 is set to track structure layer 4.
Circumferentially disposed section 1 be longitudinally arranged 2 specific structure of section: include be arranged from outside to inside anchoring cartridge 6, sheath 7, plus
Strong body 9 and optical fiber light core 8, referring to Fig. 3, the sheath 7 is metal mesh shield layer, and the intensive aspect 9 is to surround to be arranged in
The rigid metal wire of 8 periphery of optical fiber light core.The sheath is that anchoring cartridge connects with fixed duct, by composite cable and shield tunnel
Road is anchored.When it is implemented, intensive aspect is the metal reinforcement of multiply sleeve, at base cord structures.6 appearance of anchoring cartridge
It is coated with epoxy resin on face, and wraps up flexible HDPE geomembrane, is i.e. second protection measure is enclosed on the outside of optical fiber light core 8
Catadioptric covering, optical fiber light core 8 are plastic optical fiber, and optical fiber light core 8 is polymethyl methacrylate optical fiber.
Specific construction process, referring to fig. 4:
Step S1: protecting optical fiber using four layers of cored means, forms composite cable；
Step S2: fixed duct is set by transverse and longitudinal section winding mode on shield duct piece；
Step S3: composite cable is arranged in shield tunnel by specified transverse and longitudinal section winding mode；
Step S4: second protection measure is carried out to the composite cable being arranged on shield duct piece.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (7)
1. a kind of fibre system being preset in shield tunnel, which is characterized in that including composite cable and modem, tunnel
Track is assembled by shield duct piece (3), and the composite cable is anchored on the shield duct piece (3) spliced, and described answers
Distributed fiberoptic sensor is equipped in light combination cable, the modem is connect with composite cable, and for changing complex light
Lightwave signal in cable is the electric signal for characterizing shield tunnel deformation, and the composite cable includes circumferentially disposed section (1) and indulges
To arrangement section (2), the circumferential coiling one of circumferentially disposed section (1) along tunnel is enclosed and is connected to by being longitudinally arranged section (2)
Next circumferentially disposed section (1).
2. a kind of fibre system being preset in shield tunnel according to claim 1, which is characterized in that shield tunnel bottom
Portion is equipped with track structure layer (4), the top for being longitudinally arranged section (2) and being set to track structure layer (4).
3. a kind of fibre system being preset in shield tunnel according to claim 1, which is characterized in that the circumferential direction
Arrangement section (1) includes anchoring cartridge (6), sheath (7), intensive aspect (9) and the optical fiber being arranged from outside to inside with section (2) is longitudinally arranged
Light core (8), the sheath (7) are metal mesh shield layer, and the intensive aspect (9) is to surround to be arranged in optical fiber light core (8) outside
The rigid metal wire enclosed.
4. a kind of fibre system being preset in shield tunnel according to claim 3, which is characterized in that the anchoring
It covers and is coated with epoxy resin on (6) outer surface, and wrap up flexible HDPE geomembrane.
5. a kind of fibre system being preset in shield tunnel according to claim 3, which is characterized in that the optical fiber
Catadioptric covering is enclosed on the outside of light core (8).
6. a kind of fibre system being preset in shield tunnel according to claim 5, which is characterized in that the optical fiber
Light core (8) is plastic optical fiber.
7. a kind of fibre system being preset in shield tunnel according to claim 6, which is characterized in that the optical fiber
Light core (8) is polymethyl methacrylate optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920372832.4U CN209470718U (en) | 2019-03-22 | 2019-03-22 | A kind of fibre system being preset in shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920372832.4U CN209470718U (en) | 2019-03-22 | 2019-03-22 | A kind of fibre system being preset in shield tunnel |
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| Publication Number | Publication Date |
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| CN209470718U true CN209470718U (en) | 2019-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920372832.4U Expired - Fee Related CN209470718U (en) | 2019-03-22 | 2019-03-22 | A kind of fibre system being preset in shield tunnel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006604A (en) * | 2019-12-26 | 2020-04-14 | 胡美玉 | High-precision distributed tunnel crack monitoring system and method |
| CN111520190A (en) * | 2020-04-30 | 2020-08-11 | 南京地铁集团有限公司 | Construction method of shield tunnel preset optical fiber system |
| CN111779504A (en) * | 2020-07-02 | 2020-10-16 | 杭州鲁尔物联科技有限公司 | Prefabricated shield segment and health monitoring system and integration method thereof |
| CN113483688A (en) * | 2021-07-05 | 2021-10-08 | 苏州南智传感科技有限公司 | Open-cut tunnel seam multidimensional deformation monitoring method and process |
| CN114323247A (en) * | 2021-12-29 | 2022-04-12 | 中铁第四勘察设计院集团有限公司 | Tunnel and vibration transverse propagation characteristic monitoring system and operation safety monitoring method thereof |
| CN115711634A (en) * | 2022-11-16 | 2023-02-24 | 江苏中天科技股份有限公司 | Sensitivity-enhanced sensing optical cable |
-
2019
- 2019-03-22 CN CN201920372832.4U patent/CN209470718U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006604A (en) * | 2019-12-26 | 2020-04-14 | 胡美玉 | High-precision distributed tunnel crack monitoring system and method |
| CN111520190A (en) * | 2020-04-30 | 2020-08-11 | 南京地铁集团有限公司 | Construction method of shield tunnel preset optical fiber system |
| CN111779504A (en) * | 2020-07-02 | 2020-10-16 | 杭州鲁尔物联科技有限公司 | Prefabricated shield segment and health monitoring system and integration method thereof |
| CN113483688A (en) * | 2021-07-05 | 2021-10-08 | 苏州南智传感科技有限公司 | Open-cut tunnel seam multidimensional deformation monitoring method and process |
| CN114323247A (en) * | 2021-12-29 | 2022-04-12 | 中铁第四勘察设计院集团有限公司 | Tunnel and vibration transverse propagation characteristic monitoring system and operation safety monitoring method thereof |
| CN114323247B (en) * | 2021-12-29 | 2024-05-17 | 中铁第四勘察设计院集团有限公司 | Tunnel and vibration transverse propagation characteristic monitoring system and operation safety monitoring method thereof |
| CN115711634A (en) * | 2022-11-16 | 2023-02-24 | 江苏中天科技股份有限公司 | Sensitivity-enhanced sensing optical cable |
| CN115711634B (en) * | 2022-11-16 | 2023-09-19 | 江苏中天科技股份有限公司 | Sensitivity-enhanced sensing optical cable |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191008 |