CN115406372B - Shield tunnel monitoring method, device and system and storage medium - Google Patents
Shield tunnel monitoring method, device and system and storage medium Download PDFInfo
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D3/036—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves
- G01D3/0365—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves the undesired influence being measured using a separate sensor, which produces an influence related signal
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- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/322—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Brillouin scattering
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Abstract
The invention relates to the field of automatic monitoring, and discloses a shield tunnel monitoring method, a shield tunnel monitoring device, a shield tunnel monitoring system and a storage medium, which are used for reducing monitoring randomness and blind areas and improving monitoring efficiency. The shield tunnel monitoring method comprises the following steps: acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber; monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information; performing data analysis according to the temperature compensation information, the sedimentation information and the bending information to obtain an analysis result; judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result; and if so, sending early warning information to the monitoring terminal.
Description
Technical Field
The invention relates to the field of automatic monitoring, in particular to a shield tunnel monitoring method, a shield tunnel monitoring device, a shield tunnel monitoring system and a storage medium.
Background
The shield construction will inevitably disturb the stratum, which causes redistribution of the surrounding rock stress, deformation of the whole tunnel structure and diseases of different degrees.
In the current shield tunnel monitoring method, manual inspection is limited by experience and capability of workers; the station setting observation is a monitoring method for regularly measuring the displacement change of an observation point by setting a deformation observation point in a tunnel, selecting a relatively stable point position outside the deformation area as a reference and adopting modes such as triangulation and leveling, and the like. The method belongs to a point measurement mode, random and observation blind areas exist, the detection time is limited by a skylight period, and the monitoring efficiency is low.
Disclosure of Invention
The invention provides a shield tunnel monitoring method, a shield tunnel monitoring device, a shield tunnel monitoring system and a storage medium, which can reduce monitoring randomness and blind areas and improve monitoring efficiency.
The invention provides a shield tunnel monitoring method in a first aspect, which comprises the following steps: acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber; monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information; performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain an analysis result; judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result; and if so, sending early warning information to the monitoring terminal.
In a possible implementation manner, the grating sensor includes a first grating sensor and a second grating sensor, and the monitoring the shield tunnel according to the grating sensor to obtain the sedimentation information and the bending information includes: monitoring the settlement of the shield tunnel through the first grating sensor to obtain settlement information, wherein the first grating sensor is arranged along the length direction of the tunnel; and monitoring the bending of the shield tunnel through the second grating sensors to obtain bending information, wherein the second grating sensors are annularly arranged along the circumferential direction of the tunnel.
In a possible embodiment, the monitoring the shield tunnel settlement by the first grating sensor, and obtaining the settlement information includes: acquiring initial sedimentation reflection wavelength information and detection sedimentation reflection wavelength information through the first grating sensor; calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation; and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
In a possible embodiment, the monitoring the bending of the shield tunnel by the second grating sensor, and obtaining the bending information includes: acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through the second grating sensor; calculating according to the initial bending reflection wavelength information and the detection bending emission wavelength information to obtain bending reflection wavelength variation; and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
In a possible embodiment, the analyzing the data according to the temperature compensation information, the sedimentation information, and the bending information, and the obtaining the analysis result includes: performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence, wherein the settlement error information comprises settlement errors of dislocation amounts in the length directions of a plurality of adjacent tunnel segments, and the bending error information comprises a plurality of bending errors of the tunnel; and calculating according to the settlement information, the bending information, the settlement error information and the bending error information to obtain actual settlement strain variation information and actual bending strain variation information.
In a possible implementation manner, the calculating according to the sedimentation information, the bending information, the sedimentation error information, and the bending error information to obtain actual sedimentation strain variation information and actual bending strain variation information includes: extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information; calculating according to the dislocation amount of the adjacent tunnel segments in the length direction and the settlement error of the dislocation amount of the adjacent tunnel segments in the length direction to obtain actual settlement strain variation information, the actual sedimentation strain variation information comprises a plurality of actual sedimentation strain variations, and the dislocation amounts in the length direction of the adjacent tunnel segments correspond to the sedimentation errors of the dislocation amounts in the length direction of the adjacent tunnel segments one by one; calculating according to the bending strain variations and the bending errors to obtain actual bending strain variation information, wherein the actual bending strain variation information comprises a plurality of actual strain variations, and the bending strain variations correspond to the bending errors one by one.
In a possible embodiment, the determining whether at least one of longitudinal deformation and convergent deformation occurs according to the analysis result includes: judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not; if actual settlement strain variation larger than a first threshold exists in the actual settlement strain variation information, determining that longitudinal deformation occurs; and if the actual bending strain variation amount larger than a second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
The second aspect of the present invention provides a shield tunnel monitoring device, including: the acquisition module is used for acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber; the monitoring module is used for monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information; the analysis module is used for carrying out data analysis according to the temperature compensation information, the settlement information and the bending information to obtain an analysis result; the judging module is used for judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result; and the sending module is used for sending the early warning information to the monitoring terminal if the alarm is positive.
In one possible embodiment, the monitoring module comprises: the first monitoring unit is used for monitoring the settlement of the shield tunnel through the first grating sensor to obtain settlement information, and the first grating sensor is arranged along the length direction of the tunnel; and the second monitoring unit is used for monitoring the bending of the shield tunnel through the second grating sensor to obtain bending information, the second grating sensor is annularly arranged along the circumferential direction of the tunnel, and the first grating sensor and the second grating sensor jointly form a grating sensor.
In a possible embodiment, the first monitoring unit is specifically configured to: acquiring initial sedimentation reflection wavelength information and detecting sedimentation reflection wavelength information through the first grating sensor; calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation; and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
In a possible embodiment, the second monitoring unit is specifically configured to: acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through the second grating sensor; calculating according to the initial bending reflection wavelength information and the detection bending emission wavelength information to obtain bending reflection wavelength variation; and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
In one possible embodiment, the analysis module comprises: the analysis unit is used for carrying out data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence, wherein the settlement error information comprises settlement errors of dislocation amounts in the length directions of a plurality of adjacent tunnel segments, and the bending error information comprises a plurality of bending errors of the tunnel; and the calculating unit is used for calculating according to the sedimentation information, the bending information, the sedimentation error information and the bending error information to obtain actual sedimentation strain variation information and actual bending strain variation information.
In a possible embodiment, the computing unit is specifically configured to: extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information; calculating settlement errors according to the dislocation amounts in the length directions of the adjacent tunnel segments and the dislocation amounts in the length directions of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation, and the dislocation amounts in the length directions of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length directions of the adjacent tunnel segments one by one; calculating according to the bending strain variations and the bending errors to obtain actual bending strain variation information, wherein the actual bending strain variation information comprises a plurality of actual strain variations, and the bending strain variations correspond to the bending errors one by one.
In a possible implementation manner, the determining module is specifically configured to: judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not; if actual settlement strain variation larger than a first threshold exists in the actual settlement strain variation information, determining that longitudinal deformation occurs; and if the actual bending strain variation amount larger than a second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
The third aspect of the present invention provides a shield tunnel monitoring system, including: the temperature compensation optical fiber, the grating sensor, the monitoring terminal and the processor are electrically connected;
the temperature compensation optical fiber is used for acquiring temperature compensation information of the shield tunnel; the grating sensor is used for monitoring the shield tunnel to obtain settlement information and bending information; the processor is used for acquiring temperature compensation information of the shield tunnel through the temperature compensation optical fiber, acquiring settlement information and bending information through the grating sensor, analyzing to obtain an analysis result, judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result, and if so, sending early warning information to the monitoring terminal.
A fourth aspect of the present invention provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the above-mentioned shield tunnel monitoring method.
According to the technical scheme provided by the invention, temperature compensation information of the shield tunnel is obtained according to the temperature compensation optical fiber; monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information; performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain an analysis result; judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result; and if so, sending early warning information to the monitoring terminal. According to the embodiment of the invention, the influence of temperature on monitoring is avoided and the monitoring accuracy is improved by acquiring the settlement information and the bending information of the tunnel and performing temperature compensation on the tunnel according to the temperature compensation information, the monitoring time is not influenced and the monitoring area range is wide, the monitoring randomness and the dead zone are reduced and the monitoring efficiency is improved by monitoring the shield tunnel through the grating sensor and the temperature compensation optical fiber.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a shield tunnel monitoring method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a shield tunnel monitoring method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of a shield tunnel monitoring apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another embodiment of a shield tunnel monitoring apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an embodiment of a shield tunnel monitoring system according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a shield tunnel monitoring method, a shield tunnel monitoring device, a shield tunnel monitoring system and a storage medium, which can reduce monitoring randomness and blind areas and improve monitoring efficiency.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is to be understood that the executing subject of the present invention may be a shield tunnel monitoring device, and may also be a server, which is not limited herein. The embodiment of the present invention is described by taking a server as an execution subject.
For convenience of understanding, a specific flow of an embodiment of the present invention is described below, and referring to fig. 1, an embodiment of a shield tunnel monitoring method according to an embodiment of the present invention includes:
101. acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
in the shield tunnel, the change value of the shield tunnel caused by temperature influence is obtained through the temperature compensation optical fiber, when the grating sensor measures the strain change of the shield tunnel, the influence caused by temperature is avoided, the temperature compensation is carried out on the strain measurement of the shield tunnel through the temperature compensation optical fiber, and the measurement accuracy can be effectively improved. The temperature compensation optical fiber comprises a first temperature compensation optical fiber and a second temperature compensation optical fiber, wherein the first temperature compensation optical fiber is laid in the shield tunnel along the length direction, the second temperature compensation optical fiber is laid along the annular circumference direction, the first temperature compensation optical fiber and the second temperature compensation optical fiber are respectively electrically connected with the Brillouin optical time domain distributed optical fiber sensing host, temperature compensation information is obtained through the first temperature compensation optical fiber and the second temperature compensation optical fiber, and the temperature compensation information comprises first temperature compensation information obtained from the first temperature compensation optical fiber and second temperature compensation information obtained from the second temperature compensation optical fiber.
102. Monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information;
the grating sensor comprises a first grating sensor and a second grating sensor, wherein the first grating sensor is laid in the shield tunnel along the length direction, the second grating sensor is laid along the annular circumference direction, the first grating sensor and the second grating sensor are respectively and electrically connected with the optical time domain distributed optical fiber sensing host, the tunnel is longitudinally deformed and monitored through the first grating sensor, settlement information is obtained according to the change of the reflection wavelength of the first grating sensor, and bending information is obtained according to the change of the reflection wavelength of the second grating sensor.
103. Performing data analysis according to the temperature compensation information, the sedimentation information and the bending information to obtain an analysis result;
performing signal mediation on temperature compensation information through a Brillouin optical time domain distributed optical fiber sensing host to obtain a linear relation between temperature and Brillouin frequency shift in a first temperature compensation optical fiber and a linear relation between temperature and Brillouin frequency shift in a second temperature compensation optical fiber, performing signal mediation on settlement information through the Brillouin optical time domain distributed optical fiber sensing host to obtain a linear relation between settlement strain and Brillouin frequency shift in the length direction of a tunnel, performing signal mediation on bending information through the Brillouin optical time domain distributed optical fiber sensing host to obtain a linear relation between bending strain and Brillouin frequency shift in the circumferential direction of the ring of the tunnel, wherein the sensing of strain and temperature is based on Brillouin back scattering, the frequency shift of scattered light is in a good linear relation with strain and temperature change, and at the incident end of the pulsed light, the measurement and positioning functions of Brillouin frequency shift of each point on the optical fiber are completed through the measurement of the received Brillouin back scattered light power; according to the linear correlation relationship between the Brillouin frequency shift and the strain and the temperature, strain distribution and temperature distribution in the length direction of the tunnel and strain distribution and temperature distribution in the annular circumference direction of the tunnel can be obtained, and then temperature compensation is carried out to obtain an actual settlement strain variable and an actual bending strain variable.
104. Judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
comparing the actual settlement strain variable with a first threshold, and if the actual settlement strain variable is larger than the first threshold, determining that the tunnel longitudinally deforms; and comparing the actual bending strain variable with a second threshold value, and determining that the convergence deformation occurs if the actual bending strain variable is larger than the second threshold value.
When measuring whether the tunnel is deformed or not, presetting a critical value for determining that longitudinal deformation occurs, namely a first threshold value, for example, 60mm, and a critical value for determining that convergence deformation occurs, namely a second threshold value, for example, 70mm, and obtaining an actual settlement strain variable, for example, 80mm through calculation; if the actual bending strain variable obtained through calculation is 55mm, for example, the tunnel is determined to be longitudinally deformed because the actual settlement strain variable of 80mm is greater than the first threshold value of 60 mm; and determining that the tunnel is not subjected to convergence deformation because the actual bending strain variable is 55mm and is less than the second threshold value of 70 mm.
105. And if so, sending early warning information to the monitoring terminal.
In this embodiment, the first temperature compensation optical fiber, the second temperature compensation optical fiber, the first grating sensor and the second grating sensor are electrically connected to the brillouin optical time domain distributed optical fiber sensing host, respectively, and the brillouin optical time domain distributed optical fiber sensing host is electrically connected to the monitoring terminal. When the longitudinal deformation is determined to occur, acquiring the specific situation and the specific position of the longitudinal deformation according to the longitudinal deformation, sending the specific situation and the specific position of the longitudinal deformation to the monitoring terminal, when the convergence deformation is determined to occur, acquiring the specific situation and the specific position of the convergence deformation according to the convergence deformation, and sending the specific situation and the specific position of the convergence deformation acquired by the convergence deformation to the monitoring terminal; and the staff correspondingly processes the tunnel according to the information received by the monitoring terminal.
According to the embodiment of the invention, the settlement information and the bending information of the tunnel are acquired, the temperature compensation is carried out on the tunnel according to the temperature compensation information, the influence of the temperature on the monitoring is avoided, the monitoring accuracy is improved, the shield tunnel is monitored through the grating sensor and the temperature compensation optical fiber to obtain the settlement information and the bending information, the data is analyzed to judge whether at least one of longitudinal deformation and convergence deformation occurs, when the at least one of the longitudinal deformation and the convergence deformation occurs, the early warning information is sent, the monitoring time is not influenced, the monitoring area range is wide, the monitoring randomness and the monitoring dead zone are reduced, and the monitoring efficiency is improved.
Referring to fig. 2, another embodiment of the shield tunnel monitoring method according to the embodiment of the present invention includes:
201. acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
202. Monitoring the settlement of the shield tunnel through a first grating sensor to obtain settlement information;
when the change of the grating emission information is detected, the load is transmitted to the grating area of the fiber core from the structure, so that the grating distance in the grating area is changed, the refractive index of the fiber core is changed accordingly, the change of the emission wavelength is further caused, and the strain change of the detected structure can be obtained by measuring the change of the emission wavelength.
Acquiring initial sedimentation reflection wavelength information and detecting sedimentation reflection wavelength information through a first grating sensor; calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation; and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
In the length direction of the tunnel, the displacement amount of each two adjacent tunnel segments in the length direction can be measured according to the first grating sensors, the initial settlement reflection wavelength is the first settlement reflection wavelength measured value after the shield tunnel monitoring system is completed, the settlement reflection wavelength measured after the settlement reflection wavelength is the first settlement reflection wavelength measured value is detected, the settlement reflection wavelength variation amount is obtained according to the difference between the initial settlement reflection wavelength and the detection settlement reflection wavelength, when the strain of the grating area changes, the settlement reflection wavelength drifts, the settlement wavelength drift amount and the settlement strain variation amount are in a linear relation, the settlement strain variation amount is obtained according to the drift amount of the settlement wavelength, and the displacement amount of the adjacent tunnel segments in the length direction can be obtained.
203. Monitoring the bending of the shield tunnel through a second grating sensor to obtain bending information;
acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through a second grating sensor; calculating according to the initial bending reflection wavelength information and the detection bending emission wavelength information to obtain the bending reflection wavelength variation; and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
The method comprises the steps that a plurality of second grating sensors are laid along the annular circumference of the tunnel, bending changes at a plurality of positions can be measured according to the plurality of grating sensors, an initial bending reflection wavelength is a first bending reflection wavelength measured value after the tunnel finishes a shield tunnel monitoring system, a bending reflection wavelength measured after the bending reflection wavelength is the first bending reflection wavelength measured value is detected, a bending reflection wavelength variation is obtained according to the difference between the initial bending reflection wavelength and the detected bending reflection wavelength, when the strain of a grating area changes, the bending reflection wavelength shifts, the bending wavelength shift amount and the bending strain change are in a linear relation, and the bending strain variation is obtained according to the shift amount of the bending wavelengths.
204. Performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence;
performing signal mediation on the first temperature compensation information through the Brillouin optical time domain distributed optical fiber sensing host to obtain a first linear relation, wherein the first linear relation is a linear relation between the temperature in the first temperature compensation optical fiber and the Brillouin frequency shift; performing signal mediation on the second temperature compensation information through the Brillouin optical time domain distributed optical fiber sensing host to obtain a second linear relation, wherein the second linear relation is the linear relation between the temperature in the second temperature compensation optical fiber and the Brillouin frequency shift; performing signal conditioning on the settlement strain variation through the Brillouin optical time domain distributed optical fiber sensing host to obtain a third linear relation, wherein the third linear relation is the linear relation between the settlement strain variation and the Brillouin frequency shift; performing signal mediation on the bending strain variation through the Brillouin optical time domain distributed optical fiber sensing host to obtain a fourth linear relation, wherein the fourth linear relation is the linear relation between the bending strain variation and the Brillouin frequency shift; and calculating according to the first linear relation and the third linear relation to obtain settlement error information, and calculating according to the second linear relation and the fourth linear relation to obtain bending error information.
205. Calculating according to the settlement information, the bending information, the settlement error information and the bending error information to obtain actual settlement strain variation information and actual bending strain variation information;
extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information; calculating settlement errors according to the dislocation amounts in the length direction of the adjacent tunnel segments and the dislocation amounts in the length direction of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation amounts, and the dislocation amounts in the length direction of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length direction of the adjacent tunnel segments one by one; and calculating according to the plurality of bending strain variation amounts and the plurality of bending errors to obtain actual bending strain variation amount information, wherein the actual bending strain variation amount information comprises a plurality of actual strain variation amounts, and the plurality of bending strain variation amounts are in one-to-one correspondence with the plurality of bending errors.
For example, if the displacement amounts in the longitudinal direction of the plurality of adjacent tunnel segments are, for example, 50mm, 80mm, 30mm, 100mm, 90mm, and 60mm, respectively, and the sedimentation errors in the displacement amounts in the longitudinal direction of the plurality of adjacent tunnel segments are, for example, 6mm, 10mm, 4mm, 8mm, 5mm, and 12mm, respectively, the actual sedimentation strain variation amounts are 44mm, 70mm, 26mm, 96mm, 82mm, and 48mm, respectively.
206. Judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not; if the actual settlement strain variation amount larger than the first threshold exists in the actual settlement strain variation amount information, determining that longitudinal deformation occurs; and if the actual bending strain variation amount larger than the second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
For example, the first threshold is, for example, 80mm, and if the actual sedimentation strain variation amount obtained from the analysis result is, for example, 83mm, it is determined that the tunnel is longitudinally deformed; and if the actual sedimentation strain variation is 60mm according to the analysis result, determining that the tunnel does not longitudinally deform.
207. And if so, sending early warning information to the monitoring terminal.
According to the example in step 206, when it is determined that the tunnel is longitudinally deformed, the amount of change in longitudinal deformation and the specific location where the longitudinal deformation occurs are sent to the monitoring terminal.
In the embodiment of the invention, the settlement information and the bending information are obtained according to the grating sensor, data analysis is carried out according to the temperature compensation information, the settlement information and the bending information to obtain the actual settlement strain variation information and the actual bending strain variation information, whether longitudinal deformation occurs or not is judged according to the actual settlement strain variation information, whether convergence deformation occurs or not is judged according to the actual bending strain variation information, and when at least one of the longitudinal deformation and the convergence deformation occurs is determined, the early warning information is sent, so that the influence of temperature on monitoring is avoided, the monitoring accuracy is improved, the monitoring time is not influenced, the monitoring area range is wide, the monitoring randomness and the monitoring dead zone are reduced, and the monitoring efficiency is improved.
With reference to fig. 3, the method for monitoring a shield tunnel according to the embodiment of the present invention is described above, and the device for monitoring a shield tunnel according to the embodiment of the present invention is described below, in which one embodiment of the device for monitoring a shield tunnel according to the embodiment of the present invention includes:
an obtaining module 301, configured to obtain temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
the monitoring module 302 is configured to monitor the shield tunnel according to the grating sensor to obtain settlement information and bending information;
the analysis module 303 is configured to perform data analysis according to the temperature compensation information, the sedimentation information, and the bending information to obtain an analysis result;
a determining module 304, configured to determine whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
a sending module 305, configured to send the warning information to the monitoring terminal if the received signal is positive.
According to the embodiment of the invention, the settlement information and the bending information of the tunnel are acquired, the temperature compensation is carried out on the tunnel according to the temperature compensation information, the influence of the temperature on the monitoring is avoided, the monitoring accuracy is improved, the shield tunnel is monitored through the grating sensor and the temperature compensation optical fiber to obtain the settlement information and the bending information, the data is analyzed to judge whether at least one of longitudinal deformation and convergence deformation occurs, when the at least one of the longitudinal deformation and the convergence deformation occurs, the early warning information is sent, the monitoring time is not influenced, the monitoring area range is wide, the monitoring randomness and the monitoring dead zone are reduced, and the monitoring efficiency is improved.
Referring to fig. 4, another embodiment of the shield tunnel monitoring apparatus according to the embodiment of the present invention includes:
an obtaining module 301, configured to obtain temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
the monitoring module 302 is configured to monitor the shield tunnel according to the grating sensor to obtain settlement information and bending information;
the analysis module 303 is configured to perform data analysis according to the temperature compensation information, the sedimentation information, and the bending information to obtain an analysis result;
a determining module 304, configured to determine whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
a sending module 305, configured to send the warning information to the monitoring terminal if the received signal is positive.
Optionally, the monitoring module 302 includes:
the first monitoring unit 3021 is configured to monitor the sedimentation of the shield tunnel through the first grating sensor to obtain sedimentation information, where the first grating sensor is arranged along the length direction of the tunnel;
and the second monitoring unit 3022 is configured to monitor bending of the shield tunnel through a second grating sensor to obtain bending information, the second grating sensor is annularly arranged along the circumferential direction of the tunnel, and the first grating sensor and the second grating sensor together form a grating sensor.
Optionally, the first monitoring unit 3021 may be further specifically configured to:
acquiring initial sedimentation reflection wavelength information and detecting sedimentation reflection wavelength information through a first grating sensor; calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation; and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
Optionally, the second monitoring unit 3022 may be further specifically configured to:
acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through a second grating sensor; calculating according to the initial bending reflection wavelength information and the detection bending emission wavelength information to obtain the bending reflection wavelength variation; and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
Optionally, the analysis module 303 includes:
an analyzing unit 3031, configured to perform data analysis according to the temperature compensation information, the settlement information, and the bending information to obtain settlement error information measured in tunnel settlement, where the settlement error information includes a settlement error of a misalignment amount in a length direction of a plurality of adjacent tunnel segments and bending error information measured in tunnel convergence, and the bending error information includes a plurality of bending errors of the tunnel;
the calculating unit 3032 calculates according to the sedimentation information, the bending information, the sedimentation error information, and the bending error information, to obtain actual sedimentation strain variation information and actual bending strain variation information.
Optionally, the calculating unit 3032 may be further specifically configured to:
extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information; calculating settlement errors according to the dislocation amounts in the length direction of the adjacent tunnel segments and the dislocation amounts in the length direction of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation amounts, and the dislocation amounts in the length direction of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length direction of the adjacent tunnel segments one by one; and calculating according to the plurality of bending strain variation amounts and the plurality of bending errors to obtain actual bending strain variation amount information, wherein the actual bending strain variation amount information comprises a plurality of actual strain variation amounts, and the plurality of bending strain variation amounts are in one-to-one correspondence with the plurality of bending errors.
Optionally, the determining module may be further specifically configured to:
judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not; if the actual sedimentation strain variation amount larger than the first threshold exists in the actual sedimentation strain variation amount information, determining that longitudinal deformation occurs; and if the actual bending strain variation amount larger than the second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
In the embodiment of the invention, the settlement information and the bending information are obtained according to the grating sensor, data analysis is carried out according to the temperature compensation information, the settlement information and the bending information to obtain the actual settlement strain variation information and the actual bending strain variation information, whether longitudinal deformation occurs or not is judged according to the actual settlement strain variation information, whether convergence deformation occurs or not is judged according to the actual bending strain variation information, and when at least one of the longitudinal deformation and the convergence deformation occurs is determined, the early warning information is sent, so that the influence of temperature on monitoring is avoided, the monitoring accuracy is improved, the monitoring time is not influenced, the monitoring area range is wide, the monitoring randomness and the monitoring dead zone are reduced, and the monitoring efficiency is improved.
The shield tunnel monitoring device in the embodiment of the present invention is described in detail in the above fig. 3 and fig. 4 from the perspective of the modular functional entity, and the shield tunnel monitoring system in the embodiment of the present invention is described in detail in the following from the perspective of hardware processing.
Fig. 5 is a schematic structural diagram of a shield tunnel monitoring system according to an embodiment of the present invention, where the shield tunnel monitoring system 500 may have a relatively large difference due to different configurations or performances, and may include a processor 510, a temperature compensation fiber 520, a grating sensor 530, and a monitoring terminal 540, where the processor 510 performs the steps of the track monitoring method in the foregoing embodiments on the shield tunnel monitoring system 500.
It will be appreciated by those skilled in the art that the shield tunnel monitoring system configuration shown in figure 5 does not constitute a limitation of the shield tunnel monitoring system and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
The present invention also provides a computer readable storage medium, which may be a non-volatile computer readable storage medium, and which may also be a volatile computer readable storage medium, having stored therein instructions, which, when run on a computer, cause the computer to perform the steps of the shield tunnel monitoring method.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is substantially or partly contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A shield tunnel monitoring method is characterized by being applied to a shield tunnel monitoring system, wherein the shield tunnel monitoring system comprises a temperature compensation optical fiber, a grating sensor and a monitoring terminal, and the shield tunnel monitoring method comprises the following steps:
acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information;
performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain an analysis result;
judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
if yes, sending early warning information to the monitoring terminal;
the grating sensor comprises a first grating sensor and a second grating sensor, and the method for monitoring the shield tunnel according to the grating sensor comprises the following steps of:
monitoring the settlement of the shield tunnel through the first grating sensor to obtain settlement information, wherein the first grating sensor is arranged along the length direction of the tunnel;
monitoring the bending of the shield tunnel through the second grating sensors to obtain bending information, wherein the second grating sensors are annularly arranged along the circumferential direction of the tunnel;
performing data analysis according to the temperature compensation information, the sedimentation information and the bending information to obtain an analysis result, wherein the analysis result comprises:
performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence, wherein the settlement error information comprises settlement errors of dislocation amounts in the length directions of a plurality of adjacent tunnel segments, and the bending error information comprises a plurality of bending errors of the tunnel;
calculating according to the settlement information, the bending information, the settlement error information and the bending error information to obtain actual settlement strain variation information and actual bending strain variation information;
the calculating according to the sedimentation information, the bending information, the sedimentation error information and the bending error information to obtain the actual sedimentation strain variation information and the actual bending strain variation information comprises:
extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information;
calculating settlement errors according to the dislocation amounts in the length directions of the adjacent tunnel segments and the dislocation amounts in the length directions of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation, and the dislocation amounts in the length directions of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length directions of the adjacent tunnel segments one by one;
calculating according to the bending strain variations and the bending errors to obtain actual bending strain variation information, wherein the actual bending strain variation information comprises a plurality of actual strain variations, and the bending strain variations correspond to the bending errors one by one.
2. The shield tunnel monitoring method according to claim 1, wherein the monitoring of the shield tunnel settlement by the first grating sensor to obtain settlement information includes:
acquiring initial sedimentation reflection wavelength information and detecting sedimentation reflection wavelength information through the first grating sensor;
calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation;
and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
3. The shield tunnel monitoring method according to claim 1, wherein the monitoring of the bending of the shield tunnel by the second grating sensor to obtain bending information comprises:
acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through the second grating sensor;
calculating according to the initial bending reflection wavelength information and the detection bending reflection wavelength information to obtain bending reflection wavelength variation;
and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
4. The shield tunnel monitoring method of claim 1, wherein the determining whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result comprises:
judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not;
if actual settlement strain variation larger than a first threshold exists in the actual settlement strain variation information, determining that longitudinal deformation occurs;
and if the actual bending strain variation amount larger than a second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
5. The shield tunnel monitoring device is characterized by comprising:
the acquisition module is used for acquiring temperature compensation information of the shield tunnel according to the temperature compensation optical fiber;
the monitoring module is used for monitoring the shield tunnel according to the grating sensor to obtain settlement information and bending information;
the analysis module is used for carrying out data analysis according to the temperature compensation information, the settlement information and the bending information to obtain an analysis result;
the judging module is used for judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result;
the sending module is used for sending the early warning information to the monitoring terminal if the alarm information is received;
the monitoring module includes: the first monitoring unit is used for monitoring the settlement of the shield tunnel through the first grating sensor to obtain settlement information, and the first grating sensor is arranged along the length direction of the tunnel; the second monitoring unit is used for monitoring the bending of the shield tunnel through the second grating sensors to obtain bending information, and the second grating sensors are annularly arranged along the circumferential direction of the tunnel;
the analysis module includes: the analysis unit is used for carrying out data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence, wherein the settlement error information comprises settlement errors of dislocation amounts in the length directions of a plurality of adjacent tunnel segments, and the bending error information comprises a plurality of bending errors of the tunnel; the calculating unit is used for calculating according to the sedimentation information, the bending information, the sedimentation error information and the bending error information to obtain actual sedimentation strain variation information and actual bending strain variation information;
the calculation unit is used for extracting dislocation quantities in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variable quantities in the bending information; calculating settlement errors according to the dislocation amounts in the length directions of the adjacent tunnel segments and the dislocation amounts in the length directions of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation, and the dislocation amounts in the length directions of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length directions of the adjacent tunnel segments one by one; calculating according to the bending strain variations and the bending errors to obtain actual bending strain variation information, wherein the actual bending strain variation information comprises a plurality of actual strain variations, and the bending strain variations correspond to the bending errors one by one.
6. The shield tunnel monitoring device according to claim 5, wherein the first monitoring unit is specifically configured to:
acquiring initial sedimentation reflection wavelength information and detecting sedimentation reflection wavelength information through the first grating sensor;
calculating according to the initial sedimentation reflection wavelength information and the detection sedimentation reflection wavelength information to obtain sedimentation reflection wavelength variation;
and obtaining settlement information according to the settlement reflection wavelength variation, wherein the settlement information comprises the dislocation amount in the length direction of a plurality of adjacent tunnel segments.
7. The shield tunnel monitoring device according to claim 5, wherein the second monitoring unit is specifically configured to:
acquiring initial bending reflection wavelength information and detecting bending reflection wavelength information through the second grating sensor;
calculating according to the initial bending reflection wavelength information and the detection bending reflection wavelength information to obtain bending reflection wavelength variation;
and obtaining bending information according to the bending reflection wavelength variation, wherein the bending information comprises a plurality of bending strain variations of the tunnel.
8. The shield tunnel monitoring device according to claim 5, wherein the judging module is specifically configured to:
judging whether the actual sedimentation strain variation information contains actual sedimentation strain variation larger than a first threshold value or not and whether the actual bending strain variation larger than a second threshold value exists or not;
if actual settlement strain variation larger than a first threshold exists in the actual settlement strain variation information, determining that longitudinal deformation occurs;
and if the actual bending strain variation amount larger than a second threshold exists in the actual bending strain variation amount information, determining that the convergence deformation occurs.
9. A shield tunnel monitoring system, characterized in that, shield tunnel monitoring system includes: the temperature compensation optical fiber, the grating sensor, the monitoring terminal and the processor are electrically connected;
the temperature compensation optical fiber is used for acquiring temperature compensation information of the shield tunnel; the grating sensor is used for monitoring the shield tunnel to obtain settlement information and bending information; the processor is used for acquiring temperature compensation information of the shield tunnel through the temperature compensation optical fiber, acquiring settlement information and bending information through the grating sensor, analyzing to obtain an analysis result, judging whether at least one of longitudinal deformation and convergence deformation occurs according to the analysis result, and if so, sending early warning information to the monitoring terminal;
the grating sensors comprise a first sensor and a second sensor, the first grating sensor is used for monitoring the settlement of the shield tunnel to obtain settlement information, the first grating sensor is arranged along the length direction of the tunnel, the second grating sensor is used for monitoring the bending of the shield tunnel to obtain bending information, and the second grating sensor is annularly arranged along the circumferential direction of the tunnel;
performing data analysis according to the temperature compensation information, the settlement information and the bending information to obtain settlement error information measured in tunnel settlement and bending error information measured in tunnel convergence, wherein the settlement error information comprises settlement errors of dislocation amounts in the length directions of a plurality of adjacent tunnel segments, and the bending error information comprises a plurality of bending errors of the tunnel;
calculating according to the settlement information, the bending information, the settlement error information and the bending error information to obtain actual settlement strain variation information and actual bending strain variation information;
the calculating according to the sedimentation information, the bending information, the sedimentation error information and the bending error information to obtain the actual sedimentation strain variation information and the actual bending strain variation information comprises:
extracting dislocation amounts in the length direction of a plurality of adjacent tunnel segments in the settlement information and a plurality of bending strain variation amounts in the bending information;
calculating settlement errors according to the dislocation amounts in the length directions of the adjacent tunnel segments and the dislocation amounts in the length directions of the adjacent tunnel segments to obtain actual settlement strain variation information, wherein the actual settlement strain variation information comprises a plurality of actual settlement strain variation, and the dislocation amounts in the length directions of the adjacent tunnel segments correspond to the settlement errors of the dislocation amounts in the length directions of the adjacent tunnel segments one by one;
calculating according to the bending strain variations and the bending errors to obtain actual bending strain variation information, wherein the actual bending strain variation information comprises a plurality of actual strain variations, and the bending strain variations correspond to the bending errors one by one.
10. A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the shield tunnel monitoring method according to any one of claims 1-4.
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