CN205000992U - System for high accuracy on -line monitoring shield tunnel is wrong on a large scale - Google Patents
System for high accuracy on -line monitoring shield tunnel is wrong on a large scale Download PDFInfo
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- CN205000992U CN205000992U CN201520654531.2U CN201520654531U CN205000992U CN 205000992 U CN205000992 U CN 205000992U CN 201520654531 U CN201520654531 U CN 201520654531U CN 205000992 U CN205000992 U CN 205000992U
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Abstract
The utility model discloses a system for high accuracy on -line monitoring shield tunnel is wrong on a large scale, including a plurality of deformation induction system, a plurality of warp induction system and communicates through optical fiber sensing return circuit and distributed optical fiber demodulation appearance, and distributed optical fiber demodulation appearance communicates with the computer, warping induction system and personally experiencing sth. Part of the body and sensing fiber including warping the roof beam, the one end fixed connection who warp the roof beam body is on the shield tunnel section of jurisdiction of seam one side, and the other end directional fixed connection be in on the shield tunnel section of jurisdiction of seam opposite side, sensing fiber arranges the axis on surface from top to bottom along being out of shape the roof beam body, and be formed with free sensing fiber on the axis, the optical fiber sensing return circuit warp sensing fiber and distributed optical fiber demodulation appearance intercommunication on the induction system through the series connection a plurality of and forms and communicate with the computer after leading to the light return circuit. The utility model discloses simple structure has realized low cost, the high accuracy on -line monitoring of wrong of extensive shield tunnel section of jurisdiction.
Description
Technical field
The utility model relates to a kind of system of monitoring shield tunnel faulting of slab ends, particularly relate to a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, belong to construction of tunnel technical field.
Background technology
Shield tunnel, there is the engineering time short, the feature little to ambient influnence, become present subway, cross river, cross the main construction of the traffic tunnels such as sea, but, shield tunnel liner is spliced by high-strength bolt by prefabricated reinforced concrete segment, seam is there is between section of jurisdiction, under outside load action, easily there is shear strain in seam crossing, make to form faulting of slab ends between section of jurisdiction, bolt is made to produce larger shear stress on the one hand, bring waterproof hidden danger on the other hand, easily cause bolt corrosion, bring potential safety hazard, also tunnel clearance can be affected time serious, threaten traffic safety, therefore, monitoring is implemented to section of jurisdiction faulting of slab ends and for tunnel safety, there is important function.
In Practical Project, because segment joint quantity is very many, existing monitoring or detection technique means cannot realize the long-term on-line monitoring of extensive seam, therefore, are necessary the system designing the extensive seam faulting of slab ends of a kind of applicable on-line monitoring.
The people such as Horiguchi in 1989 propose first and have utilized the frequency shift property of Brillouin light as since distributed strain and TEMP, this technology is subject to the extensive concern of engineering research personnel, it mainly has following advantage: 1, distributed measurement, optical fiber is often put in theory strain, temperature can be measured, reality can often be sampled by 5cm, and spatial decomposition can reach 2cm-10cm; 2, long-distance sensing, measurable fiber lengths reaches more than 50km; 3, measuring accuracy is high, and current strain testing precision can reach 2 μ ε-10 μ ε, and temperature test precision is 0.1 DEG C; 4, test is steady in a long-term, not by environmental disturbances such as electromagnetic fields; Therefore, the utility model based on the technical design of brillouin distributed optical fiber sensing is a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale.
Utility model content
For solving the deficiencies in the prior art, the utility model provide a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, simply, monitoring accuracy is high, realizes the low cost on-line monitoring of extensive duct pieces of shield tunnel faulting of slab ends for structure.
The technical scheme that the utility model adopts is:
A kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, comprise several deformation-sensing devices, several deformation-sensing devices described are communicated with distribution type fiber-optic (FBG) demodulator through fiber sensing loop, described distribution type fiber-optic (FBG) demodulator is communicated with computer, described deformation-sensing device comprises variable shaped beam body and sensor fibre, one end of described variable shaped beam body is fixedly connected on the duct pieces of shield tunnel of seam side, other end directional at-tachment is connected on the duct pieces of shield tunnel of described seam opposite side, the upper and lower surface of described variable shaped beam body junction is provided with clamping nut, and the variable shaped beam body of described directional at-tachment end and clamp up and down between nut and have space, described sensor fibre is arranged along the axis of variable shaped beam body upper and lower surface, and on axis, be formed with free sensor fibre, described fiber sensing loop is communicated with distribution type fiber-optic (FBG) demodulator to be formed to lead to after light circuit by the sensor fibre on several deformation-sensing devices of series connection and is communicated with computer.
Further, described variable shaped beam body is connected with the duct pieces of shield tunnel of seam both sides by the screw rod be anchored on duct pieces of shield tunnel, wherein one end of described variable shaped beam body is fixedly connected with two screw rods be anchored on the duct pieces of shield tunnel of seam side by two screws, and the other end is connected with a screw rod orientation be anchored on seam opposite side duct pieces of shield tunnel by the bar hole on variable shaped beam body.
Further, because the degree of irregularity of spatial decomposition internal strain can have a strong impact on strain monitoring precision, therefore, described variable shaped beam body is the non-uniform beam of equal strength, equal thickness, in order to ensure sensitivity and the precision of strain sensing, described variable shaped beam body length is 30cm-50cm.
Further, in order to improve the long durability energy of deformation-sensing device, described variable shaped beam body, screw rod and nut are stainless steel.
Further, described space is 0.1-0.5mm, to ensure that when seam is opened or be closed variable shaped beam body can move freely and vertically without strain, when faulting of slab ends situation occurs, variable shaped beam body produces bending strain, the space of 0.1-0.5mm does not affect the susceptibility of deformation-sensing device to faulting of slab ends deformation-sensing, but when Deformation analyses calculates, needs the initial term using pore size is out of shape as faulting of slab ends to take into account.
Further, described sensor fibre is single-mode fiber, the optical fiber jacket of nylon material is also coated with at described single-mode fiber external surface, and be also woven with fibrage at optical fiber jacket, nylon material has good performance, low to environmental requirement, and can with fibre core bonds well, the fibrage of braiding can improve intensity and the decay resistance of optical fiber jacket.
Further, described sensor fibre pastes layout by alite paste along the axis of variable shaped beam body upper and lower surface comprehensively, can monitor simultaneously draw, compressive strain; Described alite paste is epoxy resin of retrofiting, and remodeling epoxy resin has higher endurance quality.
Further, described free sensor fibre is more than or equal to 20cm, and free sensor fibre is by the impact of variable shaped beam body, only responsive to variations in temperature, is used for implementing the temperature-compensating of deformation-sensing.
The beneficial effects of the utility model are:
1, have employed in the utility model can the Brillouin scattering technology of large-scale distributed monitoring, solve duct pieces of shield tunnel faulting of slab ends based on range estimation or detection means, the predicament of on-line monitoring cannot be realized, improve the safety monitoring level of construction of tunnel, there is stronger applicability and the market competitiveness;
2, in the utility model by rational structure design, duct pieces of shield tunnel faulting of slab ends deformation monitoring is made to change the strain monitoring of variable shaped beam body into, the axial strain of beam body is homogeneous strain simultaneously, significantly improve the precision of strain sensing and faulting of slab ends Deformation analyses, for the security evaluation implementing engineering structures further provides effective foundation;
3, in the utility model, sensing facilities structure is simple, achieves the low cost on-line monitoring of extensive duct pieces of shield tunnel faulting of slab ends, and the market competitiveness is strong, for ensureing that national basis installation security produces beneficial effect.
Accompanying drawing illustrates:
Fig. 1 is deformation-sensing apparatus structure schematic diagram one of the present utility model;
Fig. 2 is deformation-sensing apparatus structure schematic diagram two of the present utility model;
Fig. 3 is each parts connection diagram of the utility model;
In figure, Main Reference Numerals implication is as follows:
1, seam, 2, duct pieces of shield tunnel, 3, variable shaped beam body, 4, screw rod, 5, nut, 6, sensor fibre, 7, alite paste, 8, screw, 9, bar hole, 10, deformation-sensing device, 11, distribution type fiber-optic (FBG) demodulator, 12, computer.
Detailed description of the invention:
Below in conjunction with accompanying drawing, concrete introduction is done to the utility model.
Fig. 1 is deformation-sensing apparatus structure schematic diagram one of the present utility model; Fig. 2 is deformation-sensing apparatus structure schematic diagram two of the present utility model; Fig. 3 is each parts connection diagram of the utility model;
As shown in Figure 3: the present embodiment be a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, comprise several deformation-sensing devices 10, several deformation-sensing devices 10 are communicated with distribution type fiber-optic (FBG) demodulator 11 through fiber sensing loop, distribution type fiber-optic (FBG) demodulator 11 is communicated with computer 12, as illustrated in fig. 1 and 2: deformation-sensing device 10 comprises variable shaped beam body 3 and sensor fibre 6, one end of variable shaped beam body 3 is fixedly connected on the duct pieces of shield tunnel 2 of seam 1 side, other end directional at-tachment is connected on the duct pieces of shield tunnel 2 of described seam 1 opposite side, the upper and lower surface of variable shaped beam body 3 junction is provided with clamping nut 5, and the variable shaped beam body 3 of described directional at-tachment end and clamp up and down between nut 5 and have space, sensor fibre 6 is arranged along the axis of variable shaped beam body 3 upper and lower surface, and on axis, be formed with free sensor fibre, the free sensor fibre length of the present embodiment is 20cm, free sensor fibre is by the impact of variable shaped beam body 3, only responsive to variations in temperature, is used for implementing the temperature-compensating of deformation-sensing, in order to better temperature-compensating, free sensor fibre also can arrange length according to variable shaped beam body 3 and be greater than 20cm, described fiber sensing loop is communicated with distribution type fiber-optic (FBG) demodulator 11 to be formed to lead to after light circuit by the sensor fibre 6 on several deformation-sensing devices 10 of series connection and is communicated with computer 12.
In the present embodiment, variable shaped beam body 3 is connected with the duct pieces of shield tunnel 2 of seam 1 both sides by the screw rod 4 be anchored on duct pieces of shield tunnel 2, wherein one end of variable shaped beam body 3 is fixedly connected with two screw rods 4 be anchored on the duct pieces of shield tunnel 2 of seam 1 side by two screws 8, and the other end is connected with screw rod 3 orientation be anchored on seam 1 opposite side duct pieces of shield tunnel 2 by the bar hole 9 on variable shaped beam body 3.
Because the degree of irregularity of spatial decomposition internal strain can have a strong impact on strain monitoring precision, therefore, in the present embodiment, variable shaped beam body 3 is the non-uniform beam of equal strength, equal thickness, in order to ensure sensitivity and the precision of strain sensing, the present embodiment variable shaped beam body 3 length is 50cm, can certainly select in 30cm-50cm scope; In order to improve the long durability energy of deformation-sensing device 10, described in the present embodiment, variable shaped beam body 3, screw rod 4 and nut 5 are stainless steel.
The present embodiment directional at-tachment end variable shaped beam body 3 and to clamp the space had between nut 5 be up and down 0.5mm, to ensure that when seam 1 is opened or be closed variable shaped beam body 3 can move freely and vertically without strain, when faulting of slab ends situation occurs, variable shaped beam body 3 produces bending strain, the space of 0.5mm does not affect the susceptibility of deformation-sensing device 10 pairs of faulting of slab ends deformation-sensings, but when Deformation analyses calculates, the initial term using pore size is out of shape as faulting of slab ends is needed to take into account, certainly, also according to actual conditions, space can be arranged within the scope of 0.1-0.5mm.
In the present embodiment, sensor fibre 6 is single-mode fiber, the optical fiber jacket of nylon material is also coated with at described single-mode fiber external surface, and be also woven with fibrage at optical fiber jacket, nylon material has good performance, low to environmental requirement, and can with fibre core bonds well, the fibrage of braiding can improve intensity and the decay resistance of optical fiber jacket; Sensor fibre 6 pastes layout by alite paste 7 along the axis of variable shaped beam body 3 upper and lower surface comprehensively, can monitor simultaneously draw, compressive strain; Described alite paste 7 is epoxy resin of retrofiting, and remodeling epoxy resin has higher endurance quality.
Fig. 3 is each parts connection diagram of the present invention;
As shown in Figure 3: a kind of based on described in above-described embodiment can the method for high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, comprise step as follows:
(1) deformation-sensing device 10 is set at seam 1 place of every two duct pieces of shield tunnel 2;
(2) deformation-sensing device 10 is by the upper and lower surface strained situation of sensor fibre 6 Deformation Monitoring beam body 3, by the free sensor fibre monitor temperature formed;
(3) logical light circuit is connected to form by the sensor fibre 6 on several deformation-sensing devices 10 of series connection with distribution type fiber-optic (FBG) demodulator 11, distribution type fiber-optic (FBG) demodulator 11 resolves the centre frequency of the brillouin scattering signal in logical light circuit reverberation, and sends the data to computer 12;
(4) computer 12 is by the optical signal information of software program storage parsing, calculates the strain of deformation-sensing device 10, Temperature Distribution and faulting of slab ends distortion; Described faulting of slab ends distortion adopts integration method, and design formulas is as follows:
In formula, δ is faulting of slab ends distortion, and ε (x) and ε ' (x) is upper and lower stress distribution of variable shaped beam body 3 respectively, l and d is length and the thickness of variable shaped beam body 3 respectively,
be need moment of flexure, Δ is the initial void between nut 5 and variable shaped beam body 3, and x is the distance of the strain monitoring point on variable shaped beam body 3 axis apart from variable shaped beam body 3 fixed end.
The present embodiment is on may occurring, by the screw rod 4 that is anchored on duct pieces of shield tunnel 2 with the nut 5 that method of clamping is arranged, variable shaped beam body 3 is fixed on the seam 1 both sides duct pieces of shield tunnel 2 of lower two kinds of direction faulting of slab ends distortion, wherein one end of variable shaped beam body 3 is fixedly connected with two screw rods 4 be anchored on the duct pieces of shield tunnel 2 of seam 1 side by two screws 8, the other end is connected with screw rod 3 orientation be anchored on seam 1 opposite side duct pieces of shield tunnel 2 by the bar hole 9 on variable shaped beam body 3, and the variable shaped beam body 3 of described directional at-tachment end and clamp up and down between nut 5 and have space, to ensure that when seam 1 is opened or be closed variable shaped beam body 3 can move freely and vertically without strain, when faulting of slab ends situation occurs, variable shaped beam body 3 produces bending strain, do not affect the susceptibility of faulting of slab ends deformation-sensing, need when Deformation analyses calculates the initial term using pore size is out of shape as faulting of slab ends to take into account, pore size is generally 0.1-0.5mm, under the faulting of slab ends distortion of different directions, the direction that variable shaped beam body 3 occurs bending and deformation is also different, namely the negate of answering of variable shaped beam body 3 upper and lower surface will change, in order to the bending strain of variable shaped beam body 3 can be responded to better, adopted by sensor fibre 6 mode of comprehensively pasting to lay respectively along the axis on the upper and lower surface of variable shaped beam body 3, and on axis, be formed with free sensor fibre, its length is not less than 20cm, not by the impact of variable shaped beam body 3, only responsive to variations in temperature, is used for implementing the temperature-compensating of deformation-sensing, alite paste 7 selects the remodeling epoxy resin with increased durability energy, consider the feature of distributed Brillouin fiber optic sensing technology, the degree of irregularity of the strain namely in spatial resolution can have a strong impact on strain monitoring precision, variable shaped beam body 3 is the non-uniform beam of equal strength, equal thickness, in order to ensure sensitivity and the precision of strain sensing, variable shaped beam body 3 for the zone length of deformation-sensing at 30cm-50cm, consider the long durability energy of deformation-sensing device, variable shaped beam body 3, screw rod 4 and nut 5 all adopt stainless steel material.
By sensor fibre 6, the deformation-sensing device 10 of diverse location is connected into fiber sensing loop, sensor fibre 6 two ends after series connection are connected with distribution type fiber-optic (FBG) demodulator 11 respectively; The links such as the Brillouin light that distribution type fiber-optic (FBG) demodulator 11 is fired back by Emission Lasers, demodulation, are demodulated to the centre frequency change of light by the distortion and variations in temperature that are connected on all deformation-sensing devices 10 on fiber sensing loop; Distribution type fiber-optic (FBG) demodulator 11 is connected transmitting data information by data connection port with computer 12, the application software controlling distribution type fiber-optic (FBG) demodulator 11 is installed in computer 12, and can to considering that the stress distribution of the deformation-sensing device 10 after temperature-compensating be resolved, record, the amount of deflection of variable shaped beam body 3 end directly can be calculated, i.e. the faulting of slab ends distortion of duct pieces of shield tunnel 2 by distortion software for calculation.
The analytic method of faulting of slab ends distortion: under faulting of slab ends effect, variable shaped beam body 3 occurs bending and deformation, it is exactly faulting of slab ends distortion that the amount of deflection that corresponding to the screw rod 4 being positioned at bar hole 9, the variable shaped beam body 3 of position produces adds initial void, the variable shaped beam body 3 upper and lower surface stress distribution utilizing sensor fibre 6 to monitor, its curvature distribution can be calculated, adopt integration method to calculate the amount of deflection of variable shaped beam body 3 further, thus obtain faulting of slab ends distortion, formula is as follows:
In formula, δ is faulting of slab ends distortion, and ε (x) and ε ' (x) is upper and lower stress distribution of variable shaped beam body 3 respectively, l and d is variable shaped beam body 3 calculated length and thickness of section respectively,
be need moment of flexure, Δ is the initial void between nut 5 and variable shaped beam body 3, and x is the distance of the strain monitoring point on variable shaped beam body 3 axis apart from variable shaped beam body 3 fixed end.
The utility model is a kind of duct pieces of shield tunnel faulting of slab ends monitoring system based on brillouin distributed optical fiber sensing, duct pieces of shield tunnel faulting of slab ends is utilized to cause the strain variation of distributed sensing fiber on variable shaped beam body, recycle distributed Brillouin's strain measurement demodulation strain variation, inverting faulting of slab ends situation, realize long-term high accuracy, the low cost on-line monitoring to extensive duct pieces of shield tunnel faulting of slab ends, and temperature can self compensation.
The above is only the preferred embodiment of the utility model patent; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model patent principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the utility model patent.
Claims (8)
1. one kind can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that: comprise several deformation-sensing devices, several deformation-sensing devices described are communicated with distribution type fiber-optic (FBG) demodulator through fiber sensing loop, described distribution type fiber-optic (FBG) demodulator is communicated with computer, described deformation-sensing device comprises variable shaped beam body and sensor fibre, one end of described variable shaped beam body is fixedly connected on the duct pieces of shield tunnel of seam side, other end directional at-tachment is connected on the duct pieces of shield tunnel of described seam opposite side, the upper and lower surface of described variable shaped beam body junction is provided with clamping nut, and the variable shaped beam body of described directional at-tachment end and clamp up and down between nut and have space, described sensor fibre is arranged along the axis of variable shaped beam body upper and lower surface, and on axis, be formed with free sensor fibre, described fiber sensing loop is communicated with distribution type fiber-optic (FBG) demodulator to be formed to lead to after light circuit by the sensor fibre on several deformation-sensing devices of series connection and is communicated with computer.
2. according to claim 1 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described variable shaped beam body is connected with the duct pieces of shield tunnel of seam both sides by the screw rod be anchored on duct pieces of shield tunnel, wherein one end of described variable shaped beam body is fixedly connected with two screw rods be anchored on the duct pieces of shield tunnel of seam side by two screws, and the other end is connected with a screw rod orientation be anchored on seam opposite side duct pieces of shield tunnel by the bar hole on variable shaped beam body.
3. according to claim 1 and 2 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described variable shaped beam body is the non-uniform beam of equal strength, equal thickness, and described variable shaped beam body length is 30cm-50cm.
4. according to claim 1 and 2 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described variable shaped beam body, screw rod and nut are stainless steel.
5. according to claim 1 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described space is 0.1-0.5mm.
6. according to claim 1 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described sensor fibre is single-mode fiber, is also coated with the optical fiber jacket of nylon material, and is also woven with fibrage at optical fiber jacket at described single-mode fiber external surface.
7. a kind of according to claim 1 or 6 can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described sensor fibre pastes layout by alite paste along the axis of variable shaped beam body upper and lower surface comprehensively, and described alite paste is remodeling epoxy resin.
8. according to claim 1 a kind of can the system of high accuracy on-line monitoring shield tunnel faulting of slab ends on a large scale, it is characterized in that, described free sensor fibre is more than or equal to 20cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520654531.2U CN205000992U (en) | 2015-08-27 | 2015-08-27 | System for high accuracy on -line monitoring shield tunnel is wrong on a large scale |
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| CN201520654531.2U CN205000992U (en) | 2015-08-27 | 2015-08-27 | System for high accuracy on -line monitoring shield tunnel is wrong on a large scale |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089702A (en) * | 2015-08-27 | 2015-11-25 | 江苏省交通规划设计院股份有限公司 | System and method capable of achieving large-scale high-precision on-line monitoring of faulting of slab ends of shield tunnel |
| CN106640124A (en) * | 2017-01-23 | 2017-05-10 | 中南大学 | Detection device for assembling dislocation of pipe sections |
| CN110044268A (en) * | 2019-03-19 | 2019-07-23 | 天津大学前沿技术研究院有限公司 | Shield tunnel seam based on fiber reflection principle, which is opened, monitors system with faulting of slab ends |
| CN113983942A (en) * | 2021-10-18 | 2022-01-28 | 中国科学院武汉岩土力学研究所 | Fiber grating monitoring method and device for shield tunnel segment dislocation |
-
2015
- 2015-08-27 CN CN201520654531.2U patent/CN205000992U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089702A (en) * | 2015-08-27 | 2015-11-25 | 江苏省交通规划设计院股份有限公司 | System and method capable of achieving large-scale high-precision on-line monitoring of faulting of slab ends of shield tunnel |
| CN106640124A (en) * | 2017-01-23 | 2017-05-10 | 中南大学 | Detection device for assembling dislocation of pipe sections |
| CN110044268A (en) * | 2019-03-19 | 2019-07-23 | 天津大学前沿技术研究院有限公司 | Shield tunnel seam based on fiber reflection principle, which is opened, monitors system with faulting of slab ends |
| CN110044268B (en) * | 2019-03-19 | 2021-08-31 | 天津大学前沿技术研究院有限公司 | Shield tunnel joint opening and slab staggering monitoring system based on optical fiber reflection principle |
| CN113983942A (en) * | 2021-10-18 | 2022-01-28 | 中国科学院武汉岩土力学研究所 | Fiber grating monitoring method and device for shield tunnel segment dislocation |
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Address after: 210014 Ziyun Road, Qinhuai District, Jiangsu, No. 9, No. Patentee after: CHINA DESIGN GROUP Co.,Ltd. Patentee after: NANJING CHANGJIANG TUNNEL CO., LTD. Address before: 210005 Ziyun Road, Qinhuai District, Jiangsu, No. 9, No. Patentee before: Jiangsu Provincial Communications Planning and Design Institute Co.,Ltd. Patentee before: NANJING CHANGJIANG TUNNEL CO., LTD. |
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Granted publication date: 20160127 Termination date: 20200827 |
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