CN114323091A - Tunnel surrounding rock monitoring system and method - Google Patents
Tunnel surrounding rock monitoring system and method Download PDFInfo
- Publication number
- CN114323091A CN114323091A CN202111643414.2A CN202111643414A CN114323091A CN 114323091 A CN114323091 A CN 114323091A CN 202111643414 A CN202111643414 A CN 202111643414A CN 114323091 A CN114323091 A CN 114323091A
- Authority
- CN
- China
- Prior art keywords
- communication cable
- tunnel
- sensor
- monitoring system
- sensors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The embodiment of the application discloses a tunnel surrounding rock monitoring system and a tunnel surrounding rock monitoring method, relates to the technical field of geotechnical engineering monitoring, and solves the problem that the work of the whole system is influenced by the fault of a single sensor in the related technology. This tunnel country rock monitoring system, including main road communication cable and response subassembly, the response subassembly includes a plurality of sensors, and the sensor setting is monitored the position at the country rock, and the signal coupling of sensor still includes signal processor on the signal of main road communication cable, and signal processor connects at the end of main road communication cable signal transmission direction for with the coupling signal separation on the main road communication cable. The tunnel surrounding rock monitoring system is used for monitoring surrounding rock deformation of a tunnel in real time.
Description
Technical Field
The embodiment of the application relates to the field of geotechnical engineering monitoring, in particular to a tunnel surrounding rock monitoring system and method.
Background
With the continuous improvement of the national highway and railway network construction, tunnel engineering gradually advances to areas of western Chongshan and mountain mountains, shallow-buried, biased and large-section tunnels are increased, and tunnel excavation may face to poor geological conditions such as weak surrounding rocks, landslides and karsts. In the tunnel construction process, the deformation condition of the surrounding rock is of great importance to the overall construction of the tunnel engineering. In order to ensure smooth construction of the tunnel, the tunnel surrounding rock deformation abnormality caused by geological disasters such as water inrush, large deformation and the like needs to be monitored in a large range in real time to find tunnel deformation warning signs induced by disasters in time, and a construction scheme is modified in time according to tunnel surrounding rock deformation conditions, so that scientific basis is provided for disaster prevention and reduction.
According to the tunnel surrounding rock deformation monitoring method based on the correlation technique, distributed optical fibers are used for monitoring, sensors of a distributed optical fiber monitoring system are sequentially connected in series on the optical fibers, optical signals transmitted by the optical fibers need to sequentially enter and exit each sensor, when the sensors at a certain position are damaged, the optical signals cannot be transmitted to the subsequent optical fibers and the sensors, and therefore the whole optical fiber and the sensors connected in series on the whole optical fiber stop working, the fault tolerance rate is low, and maintenance is not convenient.
Disclosure of Invention
The tunnel surrounding rock monitoring system provided by the embodiment of the application has the advantages of high fault-tolerant rate and strong reliability.
In a first aspect, the tunnel surrounding rock monitoring system that this application embodiment provided, including main road communication cable and response subassembly, the response subassembly includes a plurality of sensors, and the sensor setting is monitored the position at the surrounding rock, and the signal coupling of sensor is on the signal of main road communication cable, still includes signal processor, and signal processor connects at the end of main road communication cable along signal transmission direction for with the coupling signal separation on the main road communication cable.
The embodiment of the application provides a tunnel country rock monitoring system, set up main road communication cable and be used for transmission signal, be connected with a plurality of sensors on main road communication cable, can monitor a plurality of positions of country rock, the signal of a plurality of sensors all couples to main road communication cable, transmit signal processing equipment through main road communication cable, thereby signal processing equipment separates the signal of coupling and reachs the monitoring data of each sensor, because each sensor works alone, when certain sensor breaks down, can not be to influencing other sensor work, thereby the fault-tolerant rate of system has been improved, the reliability of system has been promoted. Meanwhile, signals of the sensors are all coupled to a main path communication cable for transmission, so that the using amount of the cable is reduced, materials are saved, the environment is protected, the cost is reduced, compared with the scheme that the sensors in the related art are connected in series to work on one communication cable in a cooperation mode, each sensor of the tunnel surrounding rock monitoring system works independently, the fault tolerance rate is high, and the reliability is high.
In one possible implementation of the present application, the sensors are arranged in sequence along the extension direction of the main road communication cable.
The tunnel country rock monitoring system that this application embodiment provided, for the convenience of realizing the multiple spot monitoring in a large scale, set gradually the sensor along main road communication cable's extending direction, along with main road communication cable's route extends, can set gradually a plurality of sensors along the line, through the length and the route of control main road communication cable, can easily realize the multiple spot monitoring on a large scale to provide and obtain reliable monitoring data.
In one possible implementation of the present application, a space is left between two adjacent sensors.
The utility model provides a tunnel country rock monitoring system, in order to realize the maximize of the benefit of monitoring, leave the interval according to the on-the-spot monitoring demand in tunnel between two adjacent sensors, can guarantee the monitoring effect, need not too intensive the sensor of arranging again, reduce the use of sensor, under the prerequisite that satisfies the monitoring requirement, resources are saved and the energy.
In one possible implementation of the present application, the sensors are evenly distributed along the extension direction of the main road communication cable.
The utility model provides a tunnel country rock monitoring system, in order to make the overall arrangement of a plurality of sensors more reasonable, evenly set up the sensor along the extending direction of main road communication cable to by the evenly distributed sensor of monitored position at tunnel country rock, it is even by the interval between the monitored position, monitoring result has more the commonality, the sensor is buried the construction underground and is also more convenient.
In one possible implementation of the present application, the sensor is an optical fiber sensor, and the main path communication cable is an optical cable.
The tunnel country rock monitoring system that this application embodiment provided, in order to promote the monitoring effect, adopt light as monitoring and signal transmission means, have the advantage that the precision is high, simple structure, and light signal transmission is fast simultaneously, is fit for long distance detection. The optical cable and the optical fiber sensor are free of electromagnetic interference and electric leakage or electric shock.
In one possible implementation manner of the present application, a coupler is connected to the sensor, and a signal of the sensor is coupled to a signal of the main path communication cable through the coupler.
The tunnel surrounding rock monitoring system that this application embodiment provided, in order to realize the coupling of sensor signal and main road communication cable signal, connect the coupler on the sensor, on the signal coupling of main road communication cable with the signal of sensor through the coupler, specifically can be with the optical signal coupling of the optical signal of sensor and the optical signal coupling of main road communication cable to accomplish the signal synthesis stage of wavelength division multiplexing technique.
In one possible implementation of the present application, the sensor is connected to the coupler by a branch communication cable.
The tunnel country rock monitoring system that this application embodiment provided, for the convenience of arranging of sensor, be connected with branch road communication cable between sensor and coupler, under the fixed condition in main road communication cable route, can freely arrange the sensor for whole system is light thin soft, is convenient for bury underground, and main road communication cable need not strictly to be monitored the position by the country rock by the road, more does benefit to the route planning of main road communication cable simultaneously.
In one possible implementation of the present application, the plurality of sensors are any one or more of pressure sensors, displacement sensors, and strain sensors.
The tunnel surrounding rock monitoring system that this application embodiment provided, in order to improve the monitoring capability of this system, there are multiple different grade type such as pressure sensor, displacement sensor, strain sensor for monitor multiple different physical quantity, thereby carry out more comprehensive monitoring to the deformation of tunnel surrounding rock, in order to obtain more complete data, provide reliable support for the analyst.
In one possible implementation manner of the present application, the sensor has a grating-type sensing element, and the sensing element is used for sensing deformation of the tunnel surrounding rock.
The tunnel country rock monitoring system that this application embodiment provided, in order to further promote the precision of sensor, adopt the optical fiber sensor who has grating type perception element, compare in the optical fiber sensor of other perception modes, the grating sensor has the precision height, and the resolution ratio is high, advantages such as interference killing feature is strong.
In one possible implementation of the present application, a display is further included, the display being electrically coupled to the signal processor.
The tunnel country rock monitoring system that this application embodiment provided, for the convenience of the audio-visual monitoring result of learning of user, the signal processor electric connection has the display, and the monitoring data after signal processor handles shows on the display in real time, and the user can be convenient, timely through the data feedback of display to tunnel country rock deformation carry out the analysis.
In one possible implementation of the present application, the extension path of the main road communication cable is used to be disposed along the circumferential direction of the tunnel.
The tunnel surrounding rock monitoring system that this application embodiment provided, for multi-angle, omnidirectional to tunnel surrounding rock deformation monitor, main road communication cable's extension path sets up along with the circumference of tunnel, arranges that a great deal of sensor along the main road communication cable is to tunnel week side monitoring comprehensively to improve the completeness of the result of this system monitoring.
In a second aspect, the application provides a method for constructing a tunnel surrounding rock monitoring system, including: determining the number of sensors according to the field condition of the tunnel; erecting a main road communication cable, burying the sensor at the monitored position of the surrounding rock, and connecting the sensor and the signal processor with the main road communication cable.
The construction method of the tunnel surrounding rock monitoring system provided by the embodiment of the application can be used for the tunnel surrounding rock monitoring system in any one of the first aspect, and therefore the same technical effect is achieved, namely, each sensor of the tunnel surrounding rock monitoring system obtained through construction works independently, the fault tolerance rate is high, the reliability is high, the using amount of cables is reduced, materials are saved, the environment is protected, and the cost is reduced.
In one possible implementation of the present application, the initial wavelength calibration and recording is performed on the sensor before the sensor is connected to the main path communication cable.
In the construction method of the tunnel surrounding rock monitoring system provided by the embodiment of the application, in order to separate a plurality of coupled sensor signals, the initial wavelength of the sensor is firstly calibrated and recorded between the sensor and the main path communication cable connection, so that reference is provided for the signal processor, and the signal separation step of the wavelength division multiplexing technology is realized.
In one possible implementation manner of the application, in the sensor embedding step, the sensor is embedded at the junction of the tunnel lining and the surrounding rock and is tightly attached to the tunnel lining.
According to the construction method of the tunnel surrounding rock monitoring system, the sensor is buried at the junction of the tunnel lining and the surrounding rock in order to ensure the accuracy and the authenticity of monitoring data, the sensor is in contact with the surrounding rock so as to obtain accurate surrounding rock deformation data, and the sensor is attached to the tunnel lining in a clinging mode so as to truly reflect the influence of surrounding rock deformation on the tunnel lining.
In a possible implementation manner of the present application, in the step of erecting the main road communication cable, the main road communication cable needs to be tied to the tunnel lining reinforcing mesh.
According to the construction method of the tunnel surrounding rock monitoring system, the main road communication cable is bound on the tunnel lining reinforcing steel bar net in order to ensure the erection firmness of the main road communication cable, so that the main road communication cable is firmly fixed, and the line is not easy to damage, so that the main road communication cable can stably and reliably transmit signals.
Drawings
Fig. 1 is a schematic overall structure diagram of a tunnel surrounding rock monitoring system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a communication cable including a branch of a tunnel surrounding rock monitoring system provided in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an installation of a tunnel surrounding rock monitoring system provided in an embodiment of the present application in a tunnel;
fig. 4 is a schematic structural diagram of a tunnel surrounding rock monitoring system provided in an embodiment of the present application, which includes a display;
fig. 5 is a flowchart of a construction method of a tunnel surrounding rock monitoring system according to an embodiment of the present application;
fig. 6 is a flowchart of a method for constructing a tunnel surrounding rock monitoring system according to the embodiment of the present application, in which a main communication cable is firstly erected and a sensor is buried;
fig. 7 is a flowchart of erection of a main communication cable and burying of sensors after the construction method of the tunnel surrounding rock monitoring system provided by the embodiment of the present application.
Reference numerals:
1-main road communication cable; 2-an inductive component; 21-a sensor; 22-a coupler; 23-branch communication cable; 3-a signal processor; 4-a display; and 5, tunnel lining.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
In addition, in the embodiments of the present application, directional terms such as "upper", "lower", "left", and "right" are defined with respect to the schematically-placed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for descriptive and clarifying purposes, and may be changed accordingly according to changes in the orientation in which the components are placed in the drawings.
In the embodiments of the present application, unless otherwise explicitly specified or limited, the term "connected" is to be understood broadly, for example, "connected" may be a fixed connection, a detachable connection, or an integral body; may be directly connected or indirectly connected through an intermediate.
In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The embodiment of the application provides a tunnel surrounding rock monitoring system, which is arranged in a tunnel, and is used for monitoring the surrounding rock deformation of the tunnel in real time at a position, where the deformation is easy to occur, of the tunnel, and mainly detecting the deformation of the surrounding rock in forms of rheology, creep, displacement, settlement, bottom bulging and the like, so as to find out tunnel deformation risk signs induced by disasters in time, and modify a construction scheme in time according to the deformation condition of the tunnel surrounding rock, thereby providing a scientific basis for disaster prevention and reduction.
Referring to fig. 1 and 2, the tunnel surrounding rock monitoring system provided by the embodiment of the present application includes a main road communication cable 1 and a sensing component 2, the sensing component 2 includes a plurality of sensors 21, the sensors 21 are disposed at monitored positions of the surrounding rock, and signals of the sensors 21 are coupled to signals of the main road communication cable 1, and the tunnel surrounding rock monitoring system further includes a signal processor 3, and the signal processor 3 is connected to the tail end of the main road communication cable 1 along a signal transmission direction and is used for separating the coupled signals on the main road communication cable 1.
Set up main road communication cable 1 and be used for transmitting signal, be connected with a plurality of sensors 21 on main road communication cable 1, can monitor a plurality of positions of country rock, the signal of a plurality of sensors 21 all couples to main road communication cable 1, transmit signal processing equipment through main road communication cable 1, thereby signal processing equipment separates the signal of coupling and reachs the monitoring data of each sensor 21, because each sensor 21 works alone, when a certain sensor 21 breaks down, can not be to influencing other sensor 21 work, thereby the fault-tolerant rate of system has been improved, the reliability of system has been promoted. Meanwhile, signals of the sensors 21 are all coupled to the main path communication cable 1 for transmission, so that the using amount of the cable is reduced, materials are saved, the environment is protected, the cost is reduced, compared with the scheme that the sensors 21 in the related art are connected in series on one communication cable for cooperative work, the tunnel surrounding rock monitoring system has the advantages that the sensors 21 work independently, the fault tolerance rate is high, and the reliability is high.
The signal generated by the sensor 21 and the signal of the main path communication cable 1 should be consistent, specifically, the signal may be an electrical signal, or may be an optical signal, and compared with the disadvantages that the electromechanical monitoring efficiency is low, the construction is difficult, and the comprehensive monitoring is difficult to realize, the optical signal is preferably used, and the method has the advantages of high precision, small volume, high survival rate, and the like.
To facilitate multipoint monitoring over a wide range, referring to fig. 1 and 2, in one embodiment of the present application, the sensors 21 are sequentially arranged along the extending direction of the main communication cable 1. Along with the path extension of main road communication cable 1, can set up a plurality of sensors 21 in proper order along the line, through the length and the route of control main road communication cable 1, can easily realize the multiple spot monitoring on a large scale to provide and obtain reliable monitoring data.
Wherein, the distribution of sensor 21 on main road communication cable 1 can densely be distributed to obtain the monitoring data that more system is comprehensive, nevertheless in order to realize the maximize of the benefit of monitoring, refer to fig. 1 and fig. 2, in an embodiment of this application, leave the interval between two adjacent sensors 21 according to the on-the-spot monitoring demand in tunnel, can guarantee the monitoring effect, need not too densely arrange sensor 21 again, reduce the use of sensor 21, under the prerequisite that satisfies the monitoring requirement, resources are saved and the energy.
In order to make the layout of the plurality of sensors 21 more reasonable, referring to fig. 1 and 2, in one embodiment of the present application, the sensors 21 are uniformly distributed along the extending direction of the main road communication cable 1. Therefore, the intervals between the monitored positions are uniform, the monitoring result is more universal, and the embedding construction of the sensor 21 is more convenient.
Because different information carriers have different physical characteristics, in view of application scenarios, in order to improve monitoring effects, in an embodiment of the present application, the sensor 21 is an optical fiber sensor 21, and the main path communication cable 1 is an optical cable. The optical fiber sensor 21 uses light as a sensing medium, the optical cable is used for transmitting optical signals, and the light is used as a monitoring and signal transmission means, so that the optical fiber sensor has the advantages of high precision and simple structure, and meanwhile, the optical signal transmission is fast, and the optical fiber sensor is suitable for long-distance detection. The optical cable and the optical fiber sensor 21 are free of electromagnetic interference and electric leakage or electric shock.
In a system using an optical signal as an information carrier, a Wavelength Division Multiplexing (WDM) technology is used, which is a communication technology that combines a series of optical signals with information and different wavelengths emitted from an optical fiber sensor 21 into one beam, transmits the beam along a single main path communication cable 1, and separates the optical signals with different wavelengths at a terminal of the main path communication cable 1 through a signal processor 3. Wherein the signal processor 3 can be a fiber grating demodulator, the technology can simultaneously transmit multiple signals on one main communication cable 1, and each signal is transmitted by light with a specific wavelength.
In order to couple the signal of the sensor 21 with the signal of the main communication cable 1, referring to fig. 1 and fig. 2, in an embodiment of the present application, the sensor 21 is connected with a coupler 22, and the signal of the sensor 21 is coupled to the signal of the main communication cable 1 through the coupler 22, specifically, the optical signal of the sensor 21 may be coupled with the optical signal of the main communication cable 1 to complete the signal synthesis phase of the wavelength division multiplexing technology.
It should be noted that there are various connection modes between the sensor 21 and the coupler 22, and any mode capable of ensuring communication between the sensor 21 and the coupler 22 is within the protection scope of the present application, referring to fig. 1, in an embodiment of the present application, the sensor 21 and the coupler 22 are fixed together, at this time, the path of the main communication cable 1 needs to strictly pass through the monitored position, so that the sensor 21 can obtain accurate transmission data, at this time, because the sensor 21 and the coupler 22 are directly fixed, the connection is firmer.
To facilitate the placement of the sensor 21, referring to fig. 2, in one embodiment of the present application, the sensor 21 is connected to the coupler 22 by a branch communication cable 23. Owing to set up branch road communication cable 23, be equivalent to the flexible connection between sensor 21 and the coupler 22, under the fixed condition in main road communication cable 1 route, can freely arrange sensor 21 for whole set of system is light thin soft, is convenient for bury underground, and main road communication cable 1 need not strictly to be monitored the position by the surrounding rock, more does benefit to main road communication cable 1's route planning.
The surrounding rock deformation may have various forms such as caving and collapse of loose and broken surrounding rock mass, local and overall radial large deformation and collapse of soft and expandable soil and rock mass, mountain deformation and rock burst in hard and complete rock mass, and accordingly various physical quantity changes of the surrounding rock are caused, and in order to improve the monitoring capability of the system, in one embodiment of the application, the plurality of sensors 21 are any one or more of pressure sensors 21, displacement sensors 21 and strain sensors 21. The pressure sensor 21, the displacement sensor 21, the strain sensor 21 and other sensors 21 of different types can monitor various different physical quantities, so that deformation of tunnel surrounding rock is monitored more comprehensively, more complete data is obtained, and reliable support is provided for an analyst.
It should be noted that the grating sensor 21 can be made into a plurality of sensors 21 with different sensing principles according to the optical characteristics such as intensity, wavelength, frequency, polarization state, etc. to further improve the accuracy of the sensor 21, in an embodiment of the present application, the sensor 21 has a grating type sensing element, and the sensing element is used for sensing the deformation of the tunnel surrounding rock. Compared with the optical fiber sensor 21 with other sensing modes, the optical fiber sensor 21 with the grating type sensing element has the advantages of high precision, high resolution, strong anti-interference capability and the like.
In order to facilitate the user to intuitively know the monitoring result, referring to fig. 4, in an embodiment of the present application, a display 4 is further included, and the display 4 is electrically coupled to the signal processor 3. The monitoring data processed by the signal processor 3 are displayed on the display 4 in real time, and the user can conveniently and timely analyze the deformation of the tunnel surrounding rock through the data feedback of the display 4, and it should be noted that the display 4 is an external display 4.
For multi-angle and omni-directional monitoring of tunnel surrounding rocks, referring to fig. 3 and 4, in an embodiment of the present application, the extension path of the main path communication cable 1 is used to be arranged along the circumferential direction of the tunnel. The sensors 21 arranged along the main communication cable 1 comprehensively monitor the periphery of the tunnel, so that the completeness of the monitoring result of the system is improved.
When the tunnel surrounding rock monitoring system is used, signals of the whole system are led out by the main path communication cable 1 and are connected to the signal processor 3, when tunnel surrounding rock deformation monitoring is carried out, the signal processor 3 acquires wavelength change information sent by the sensor 21 according to tunnel surrounding rock conditions in real time, when a tunnel deforms, the refractive index of a grating type sensing element of the optical fiber sensor 21 changes, the acquired wavelength information is processed and analyzed by the signal processor 3, tunnel surrounding rock deformation results are displayed in the external display 4 in real time, and therefore an operator can timely analyze tunnel surrounding rock deformation according to data feedback.
In addition, the application provides a tunnel surrounding rock monitoring system construction method, referring to fig. 5, specifically including the following steps:
step S1: determining the number of the sensors 21 according to the field condition of the tunnel;
step S2: a main road communication cable 1 is erected, a sensor 21 is buried in a surrounding rock monitored position, and the sensor 21 and a signal processor 3 are connected to the main road communication cable 1.
The construction method can be used for the tunnel surrounding rock monitoring system provided by the application, and therefore the same technical effect is achieved, namely, each sensor 21 of the tunnel surrounding rock monitoring system obtained through construction works independently, the fault tolerance rate is high, the reliability is high, meanwhile, the using amount of cables is reduced, materials are saved, the environment is protected, and the cost is reduced.
In step S2 of the construction method of the present application, the main communication cable 1 is erected and the sensor 21 is embedded, and the embedding order of the sensor 21, the signal processor 3, and the main communication cable 1 can be determined according to the construction situation.
Referring to fig. 6, in the first embodiment of the present application, step S2 mainly includes the following steps:
step S21: erecting a main road communication cable 1, and burying a sensor 21 at a monitored position of surrounding rocks;
step S23: the sensor 21 and the signal processor 3 are connected to the main road communication cable 1.
The main path communication cable 1 and the embedded sensor 21 are connected after being erected, and the main path communication cable 1 and the embedded sensor 21 are separated from each other and cannot influence each other when the main path communication cable 1 and the embedded sensor 21 are erected, so that construction is more convenient.
Referring to fig. 7, in the second embodiment of the present application, step S2 mainly includes the following steps:
step S22: connecting the sensor 21 and the signal processor 3 with the main road communication cable 1;
step S23: a main path communication cable 1 is erected, and a sensor 21 is buried in a surrounding rock monitored position.
The main road communication cable 1 is erected and the sensor 21 is buried after connection, and the system performance can be tested before the main road communication cable 1 is erected and the sensor 21 is buried, so that all parts can work normally, and rework is avoided.
In order to be able to separate the coupled signals of the plurality of sensors 21, referring to fig. 6 and 7, in one embodiment of the present application, the sensors 21 are initially wavelength-calibrated and recorded before the sensors 21 are connected to the main communication cable 1, thereby providing a reference for the signal processor 3 to implement the signal separation step of the wavelength division multiplexing technique.
Referring specifically to fig. 6, in the first embodiment of step S2, before connecting the sensor 21, the signal processor 3 and the main communication cable 1 in step S23, there is step S22: the sensor 21 is initially wavelength calibrated and recorded. Referring to fig. 7, in the second embodiment of step S2, before connecting the sensor 21, the signal processor 3 and the main communication cable 1 in step S22, there is step S21: the sensor 21 is initially wavelength calibrated and recorded.
In order to ensure the accuracy and authenticity of the monitoring data, in one embodiment of the present application, the sensor 21 is buried at the boundary between the tunnel lining 5 and the surrounding rock and the sensor 21 is closely attached to the tunnel lining 5 in the burying step of the sensor 21. The sensor 21 is buried at the junction of the tunnel lining 5 and the surrounding rock, the sensor 21 is in contact with the surrounding rock so as to obtain accurate surrounding rock deformation data, and the sensor 21 is attached to the tunnel lining 5 so as to truly reflect the influence of the surrounding rock deformation on the tunnel lining 5.
In order to ensure the stability of the main communication cable 1, in one embodiment of the present application, the main communication cable 1 is tied to the reinforcing mesh of the tunnel lining 5 during the step of erecting the main communication cable 1. Therefore, the main communication cable 1 is firmly fixed, the circuit of the main communication cable is not easy to be damaged, so that the main communication cable 1 can stably and reliably transmit signals, and in addition, the length of the main communication cable 1 can be determined according to the field condition of the tunnel.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (15)
1. A tunnel surrounding rock monitoring system, comprising:
a main road communication cable;
the sensing assembly comprises a plurality of sensors, the sensors are arranged at the monitored positions of the surrounding rocks, and signals of the sensors are coupled on signals of the main path communication cable;
and the signal processor is connected to the tail end of the main road communication cable along the signal transmission direction and is used for separating the coupling signal on the main road communication cable.
2. The tunnel surrounding rock monitoring system of claim 1, wherein the sensors are arranged in sequence along an extension direction of the main road communication cable.
3. The tunnel surrounding rock monitoring system of claim 2, wherein a space is left between two adjacent sensors.
4. The tunnel country rock monitoring system of claim 3 wherein the sensors are evenly distributed along the direction of extension of the main road communication cable.
5. The tunnel country rock monitoring system of claim 1 wherein the sensor is a fiber optic sensor and the main road communication cable is an optical cable.
6. The tunnel surrounding rock monitoring system of claim 1, wherein a coupler is connected to the sensor, and a signal of the sensor is coupled to a signal of the main path communication cable through the coupler.
7. The tunnel wall rock monitoring system of claim 1, wherein the sensor is connected to the coupler by a branch communication cable.
8. The tunnel wall rock monitoring system of claim 1, wherein the plurality of sensors are any one or more of pressure sensors, displacement sensors and strain sensors.
9. The system of claim 2, wherein the sensor has a grating-type sensing element for sensing deformation of the tunnel wall rock.
10. The tunnel wall rock monitoring system of claim 1, further comprising a display electrically coupled to the signal processor.
11. The tunnel wall rock monitoring system of claim 1, wherein the extended path of the main road communication cable is for being disposed circumferentially of the tunnel.
12. A construction method of a tunnel surrounding rock monitoring system is characterized by comprising the following steps:
determining the number of the sensors according to the field condition of the tunnel;
erecting the main road communication cable, burying the sensor at a monitored position of a surrounding rock, and connecting the sensor and the signal processor with the main road communication cable.
13. The method of claim 12, wherein the sensors are initially wavelength calibrated and recorded prior to being connected to the main path communication cable.
14. The method for constructing a tunnel surrounding rock monitoring system according to claim 12, wherein in the sensor embedding step, the sensor is embedded at a boundary between a tunnel lining and the surrounding rock and is closely attached to the tunnel lining.
15. The method for constructing a tunnel surrounding rock monitoring system according to claim 12, wherein in the step of erecting the main road communication cable, the main road communication cable is bound to a tunnel lining reinforcing mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643414.2A CN114323091A (en) | 2021-12-29 | 2021-12-29 | Tunnel surrounding rock monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643414.2A CN114323091A (en) | 2021-12-29 | 2021-12-29 | Tunnel surrounding rock monitoring system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114323091A true CN114323091A (en) | 2022-04-12 |
Family
ID=81017177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111643414.2A Pending CN114323091A (en) | 2021-12-29 | 2021-12-29 | Tunnel surrounding rock monitoring system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114323091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428011A (en) * | 2023-04-25 | 2023-07-14 | 成都零一通途科技有限公司 | Tunnel construction safety risk intelligent monitoring and early warning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613885A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Tunnel pipeline monitoring and early warning system |
| CN207095615U (en) * | 2017-08-25 | 2018-03-13 | 河南瑞欧光电科技有限公司 | Tunnel monitoring system based on fiber grating |
| CN209904774U (en) * | 2019-01-28 | 2020-01-07 | 深圳大学 | Subway track monitoring system with long distance, high precision and switching |
| CN110803199A (en) * | 2019-10-07 | 2020-02-18 | 上海黑山科技有限公司 | High-speed railway tunnel safety perception and early warning system |
| CN112832866A (en) * | 2020-12-30 | 2021-05-25 | 西南交通大学 | Tunnel whole life cycle monitoring and early warning system and building method |
| CN214200000U (en) * | 2020-12-22 | 2021-09-14 | 中铁第五勘察设计院集团有限公司 | Fiber grating strain sensor and monitoring system |
-
2021
- 2021-12-29 CN CN202111643414.2A patent/CN114323091A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613885A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Tunnel pipeline monitoring and early warning system |
| CN207095615U (en) * | 2017-08-25 | 2018-03-13 | 河南瑞欧光电科技有限公司 | Tunnel monitoring system based on fiber grating |
| CN209904774U (en) * | 2019-01-28 | 2020-01-07 | 深圳大学 | Subway track monitoring system with long distance, high precision and switching |
| CN110803199A (en) * | 2019-10-07 | 2020-02-18 | 上海黑山科技有限公司 | High-speed railway tunnel safety perception and early warning system |
| CN214200000U (en) * | 2020-12-22 | 2021-09-14 | 中铁第五勘察设计院集团有限公司 | Fiber grating strain sensor and monitoring system |
| CN112832866A (en) * | 2020-12-30 | 2021-05-25 | 西南交通大学 | Tunnel whole life cycle monitoring and early warning system and building method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428011A (en) * | 2023-04-25 | 2023-07-14 | 成都零一通途科技有限公司 | Tunnel construction safety risk intelligent monitoring and early warning system |
| CN116428011B (en) * | 2023-04-25 | 2023-11-17 | 成都零一通途科技有限公司 | Tunnel construction safety risk intelligent monitoring and early warning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101667324B (en) | Method and system for monitoring and warning pipeline landslide and method for constructing system | |
| CN101667327B (en) | Method and system for monitoring and warning pipeline landslide depth displacement and method for constructing system | |
| CN201278201Y (en) | Pipeline landslide monitoring pre-alarming system based on fiber grating | |
| US6728165B1 (en) | Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors | |
| CN101667328B (en) | Method and system for monitoring and warning pipeline landslide surface displacement and method for constructing system | |
| US9617847B2 (en) | Robust optical fiber-based distributed sensing systems and methods | |
| CN110912605B (en) | Safety monitoring and early warning device and method for optical cable or photoelectric composite cable | |
| US20130319121A1 (en) | Distributed Acoustic Sensing | |
| CN101667326B (en) | Method and system for monitoring and warning influence of landslide on pipeline | |
| CN103988089A (en) | Detecting broadside acoustic signals with a fiber optical distributed acoustic sensing (DAS) assembly | |
| JP3894494B2 (en) | Sediment disaster prediction system, regional information provision system, and sediment disaster prediction method | |
| CN201278199Y (en) | Pipeline landslide deep displacement monitoring pre-alarming system based on fiber grating | |
| CN201278198Y (en) | Monitoring pre-warning system for influence of landslide to pipeline | |
| CN104919339B (en) | Integrated earthquake monitoring system and method | |
| CN107532925A (en) | For detecting optical sensor parameters of interest | |
| CN114323091A (en) | Tunnel surrounding rock monitoring system and method | |
| CN102278948B (en) | Compound optical fiber sensing monitoring system and method based on optical fiber compound sensing module | |
| CN201028977Y (en) | Multi-parameter detecting instrument based on compound optical fiber device | |
| WO2017105416A1 (en) | Large area seismic monitoring using fiber optic sensing | |
| CN210566747U (en) | Optical fiber composite pipeline and monitoring system thereof | |
| CN1938559A (en) | Method for locating and measuring deformations in a work of civil engineering | |
| CN108490502A (en) | Mine detection system and its detection method | |
| CA2898502C (en) | Method and device for installing multiple fiber optic cables in coiled tubing | |
| JP2000292216A (en) | Optical fiber sensor | |
| Briançon et al. | New technology for strain measurements in soil and the survey of reinforced earth constructions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |