CN114323247B - Tunnel and vibration transverse propagation characteristic monitoring system and operation safety monitoring method thereof - Google Patents
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Abstract
The invention relates to a monitoring system for the transverse propagation characteristics of vibration of a tunnel section, which comprises a transverse vibration monitoring optical cable, a data demodulator and a data processing unit, wherein the axis of the transverse vibration monitoring optical cable is perpendicular to the longitudinal direction of the tunnel, and the data demodulator is used for receiving information sent by the transverse vibration monitoring optical cable, demodulating the information into demodulation signals and sending the demodulation signals to a background processor; the transverse vibration monitoring optical cable is an optical fiber grating array vibration optical cable integrated with a plurality of optical fiber grating vibration sensors, transversely extends from the top surface of the ballast bed plate, and is sequentially distributed through the side surface of the ballast bed plate, the surface of the track base, the surface of the tunnel backfill layer and the tunnel side wall. And the rail transit tunnel provided with the monitoring system and the operation safety monitoring method of the rail transit tunnel are also related. The invention can realize the full-path continuous vibration monitoring along the vibration transverse propagation path, can reliably analyze and obtain the transverse vibration propagation and attenuation characteristics of the tunnel section, and is beneficial to the health monitoring of the tunnel cross section; the occurrence condition of abnormal fluctuation in the tunnel can be mastered in real time so as to remove potential safety hazards in time.
Description
Technical Field
The invention belongs to the technical field of track traffic engineering, and particularly relates to a tunnel section vibration transverse propagation characteristic monitoring system, a track traffic tunnel provided with the tunnel section vibration transverse propagation characteristic monitoring system and an operation safety monitoring method of the track traffic tunnel.
Background
In railway systems such as high-speed railways, inter-city railways, urban railway systems, urban rail transit and the like, the railway is inevitably influenced by various factors such as terrain conditions, economic development of various areas and the like, the railway can not pass through areas such as long and large mountain areas, urban underground and the like, the safety state of a railway tunnel structure directly influences the stability and safety of train operation, a good operation state can be ensured by a railway tunnel, and the method is significant for guaranteeing railway operation. The monitoring of railway tunnels involves a number of projects in which the effects of railway vibrations on the tunnel body and along-line buildings need to be of concern. When the train runs, the stress distribution generated by the contact surface of the wheels and the steel rail changes along with the change, secondary vibration of surrounding buildings is induced, and the work and life of residents along the line are greatly influenced, and the problem is also long-standing; in addition, the ancient architecture along the railway is relatively fragile in structure due to the long age, and is more easily damaged by railway vibration.
Disclosure of Invention
The invention relates to a tunnel section vibration transverse propagation characteristic monitoring system, a track traffic tunnel provided with the tunnel section vibration transverse propagation characteristic monitoring system and an operation safety monitoring method of the track traffic tunnel, which can at least solve part of defects in the prior art.
The invention relates to a tunnel section vibration transverse propagation characteristic monitoring system, which comprises a transverse vibration monitoring optical cable and a data demodulator connected with the transverse vibration monitoring optical cable, wherein the data demodulator is used for receiving information sent by the transverse vibration monitoring optical cable, demodulating the information into a demodulation signal and sending the demodulation signal to a background processor;
The transverse vibration monitoring optical cable is an optical fiber grating array vibration optical cable integrated with a plurality of optical fiber grating vibration sensors; the axis of the transverse vibration monitoring optical cable is vertical to the longitudinal direction of the tunnel, and the transverse vibration monitoring optical cable transversely extends from the top surface of the ballast bed plate and sequentially passes through the side surface of the aisle bed plate, the surface of the track base, the surface of the tunnel backfill layer and the tunnel side wall.
Further, the transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel.
Further, the data demodulator is arranged on the ground and connected with the ground end of the transverse vibration monitoring optical cable.
Further, the data demodulator is arranged on the side wall of the tunnel, and the cable section in the pipe arranged in the tunnel and the cable section outside the pipe arranged in the surrounding rock of the tunnel and extending into the main body of the tunnel are respectively connected with the data demodulator.
Further, vibration monitoring grooves are correspondingly formed in the track structure and the tunnel structure so as to embed the transverse vibration monitoring optical cable.
Further, a plurality of the transverse vibration monitoring optical cables are longitudinally distributed along the tunnel.
The invention also relates to a track traffic tunnel, which comprises a tunnel main body, a tunnel backfill layer formed at the bottom of the tunnel main body, a ballastless track formed on the tunnel backfill layer and the system for monitoring the transverse propagation characteristics of the vibration of the tunnel section.
The invention also relates to an operation safety monitoring method of the track traffic tunnel, which comprises the following steps:
Selecting a concerned section from a tunnel section as a monitoring target, and configuring a tunnel section vibration transverse propagation characteristic monitoring system on the concerned section;
The data demodulator receives the vibration information sent by the transverse vibration monitoring optical cable, demodulates the vibration information into a demodulation signal and sends the demodulation signal to the background processor;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, judges whether the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal, and guides a working department to detect and maintain the track structure and the tunnel structure on the concerned section if the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal.
Further, the operation safety monitoring method further comprises the following steps:
The transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; collecting vibration information on a transverse vibration propagation path of a track, a tunnel, a soil body and the ground through the transverse vibration monitoring optical cable;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, and judges the influence degree of the transverse propagation of the vibration on the concerned section on the buildings along the lines so as to protect the buildings along the lines of the tunnels.
Further, the operation safety monitoring method further comprises the following steps:
The transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; and the background processor judges the influence degree of the tunnel surrounding engineering construction on the surrounding rock of the tunnel and the main body of the tunnel according to the vibration information generated by the obtained tunnel surrounding engineering construction so as to protect the track traffic tunnel.
The invention has at least the following beneficial effects:
According to the invention, the fiber bragg grating array vibration optical cable is arranged on the tunnel cross section, and is arranged on the track bed board, the track base, the tunnel backfill layer and the tunnel side wall in an extending way, so that full-path continuous vibration monitoring along the vibration transverse propagation path can be realized, the monitoring data has comprehensiveness, richness and real-time effectiveness, the transverse vibration propagation and attenuation characteristics of the tunnel section can be reliably analyzed and obtained, and the health monitoring of the tunnel cross section by the working department is facilitated; and the occurrence condition of abnormal fluctuation in the tunnel can be mastered in real time, so that the potential safety hazard can be eliminated in time.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an arrangement of a transverse vibration monitoring cable according to an embodiment of the present invention;
FIG. 2 is a schematic view of the arrangement of the transverse vibration monitoring fiber optic cable on the track bed board according to the embodiment of the present invention;
Fig. 3 is a schematic layout view of a longitudinal vibration monitoring optical cable according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a system for monitoring a transverse propagation characteristic of vibration in a tunnel section, which includes a transverse vibration monitoring optical cable 2 and a data demodulator connected to the transverse vibration monitoring optical cable 2, where the data demodulator is configured to receive information sent by the transverse vibration monitoring optical cable 2, demodulate the information into a demodulated signal, and send the demodulated signal to a background processor; the transverse vibration monitoring optical cable 2 is a fiber grating array vibration optical cable integrated with a plurality of fiber grating vibration sensors; the axis of the transverse vibration monitoring optical cable 2 is perpendicular to the longitudinal direction of the tunnel, and the transverse vibration monitoring optical cable extends transversely from the top surface of the ballast bed plate 11, and is sequentially distributed through the side surface of the ballast bed plate 11, the surface of the track base 12, the surface of the tunnel backfill layer 13 and the tunnel side wall.
The fiber grating array vibration optical cable is a cable with a plurality of fiber grating vibration sensors integrated in a single optical cable, is an existing product, has the characteristics of wide monitoring coverage (more than 10km can be covered according to the requirement), high measurement precision, small spacing between sensing units (the minimum spacing can be 1 cm) and the like, and specific structures are not repeated here. The data demodulator is also an existing device; the connection between the background processor and the background processor can be electric connection or communication connection, which is a conventional technology.
It will be appreciated that the above-mentioned transverse vibration monitoring optical cable 2 is arranged on the cross section of the tunnel, and a section of interest on which the above-mentioned transverse vibration monitoring optical cable 2 is arranged may be selected as a monitoring target in the tunnel. When the width of the track base 12 is greater than the width of the track bed 11, the transverse vibration monitoring optical cable 2 extends downwards from the side surface of the track bed 11 to the top surface of the track base 12, then extends transversely along the top surface of the track base 12 to the side surface of the track base 12, and extends from the side surface of the track base 12 to the surface of the tunnel backfill layer 13; similarly, when the width of the tunnel backfill layer 13 is greater than the width of the track base 12, the transverse vibration detection optical cable extends downward from the side surface of the track base 12 to the top surface of the tunnel backfill layer 13, then extends transversely along the top surface of the tunnel backfill layer 13 to the side surface of the tunnel backfill layer 13, and extends from the side surface of the tunnel backfill layer 13 to the tunnel side wall. Because the steel rail is the main vibration source in the tunnel, the transverse vibration monitoring optical cable 2 is suitable to pass through the right lower part of the steel rail; optionally, the lateral vibration monitoring cable 2 passes over the rail bottom surface, or the bottom surface of an iron pad disposed in the fastener assembly.
In one embodiment, the track structure and the tunnel structure are correspondingly provided with vibration monitoring grooves for burying the transverse vibration monitoring optical cable 2, and the vibration monitoring grooves are preferably filled with concrete, so that the fixation of the transverse vibration monitoring optical cable 2 is ensured, and the vibration monitoring grooves are preferably filled with high-strength and quick-setting concrete. Correspondingly, vibration monitoring grooves are respectively formed in the top surface of the ballast bed plate 11, the side surface of the ballast bed plate 11, the top surface of the track base 12, the side surface of the track base 12, the top surface of the tunnel backfill layer 13, the side surface of the tunnel backfill layer 13 and the side wall of the tunnel, and are sequentially communicated, so that the transverse vibration monitoring optical cable 2 is conveniently arranged. The vibration monitoring groove is formed in the surfaces of the track structure and the tunnel structure, shallow groove wiring is formed, and optionally, the groove depth of the vibration monitoring groove is in the range of 15-25 mm.
In the embodiment, the fiber bragg grating array vibration optical cable is arranged on the cross section of the tunnel, and is arranged on the track bed plate 11, the track base 12, the tunnel backfill layer 13 and the side wall of the tunnel in an extending way, so that full-path continuous vibration monitoring along the transverse vibration propagation path can be realized, the monitoring data has comprehensiveness, richness and real-time effectiveness, the transverse vibration propagation and attenuation characteristics of the tunnel section can be reliably analyzed and obtained, and the health monitoring of the cross section of the tunnel by the working department is facilitated; and the occurrence condition of abnormal fluctuation in the tunnel can be mastered in real time, so that the potential safety hazard can be eliminated in time.
Further preferably, as shown in fig. 1, the lateral vibration monitoring optical cable 2 also extends vertically out from the tunnel sidewall and extends into the tunnel surrounding rock to the ground. Accordingly, the transverse vibration monitoring optical cable 2 may be laid by drilling holes in the tunnel surrounding rock or the like, and the wiring holes in the tunnel surrounding rock may be filled with grouting slurry or the like. Therefore, the transverse vibration propagation path of the track, the tunnel, the soil body and the ground can be obtained, the propagation and attenuation characteristics of the tunnel vibration transversely propagated to the ground can be conveniently mastered, and the influence of the railway vibration on the buildings along the lines can be conveniently mastered by related departments, so that corresponding measures can be taken to reduce or eliminate the influence, and the purpose of protecting the buildings along the tunnels is achieved.
In one embodiment, the data demodulator is disposed on the ground and connected to the ground end of the lateral vibration monitoring cable 2. In a further embodiment, the data demodulator is arranged on the side wall of the tunnel, and the cable section in the pipe arranged in the tunnel and the cable section outside the pipe arranged in the surrounding rock of the tunnel and extending into the main body of the tunnel are respectively connected with the data demodulator.
The density of the fiber bragg grating vibration sensors in the transverse vibration monitoring optical cable 2 can be set according to specific conditions, for example, the interval between two adjacent fiber bragg grating vibration sensors is in the range of 0.1-0.2 m.
Further preferably, a plurality of the transverse vibration monitoring optical cables 2 are longitudinally distributed along the tunnel, so that vibration monitoring can be performed on a plurality of cross sections of the tunnel, and the comprehensiveness and accuracy of the vibration monitoring of the tunnel are further improved.
The embodiment can provide data and reference for researching boundary conditions of a vehicle-track-tunnel-soil body coupling dynamic analysis theoretical model by collecting rich vibration information.
Example two
As shown in fig. 1, an embodiment of the present invention provides a track traffic tunnel, which includes a tunnel main body, a tunnel backfill layer 13 formed at the bottom of the tunnel main body, and a ballastless track formed on the tunnel backfill layer 13, and is further configured with the system for monitoring the transverse propagation characteristics of vibration of a tunnel section provided in the above embodiment.
The track traffic tunnel can be a railway tunnel or a subway tunnel.
Further, the embodiment of the invention also relates to an operation safety monitoring method of the track traffic tunnel, which comprises the following steps:
Selecting a concerned section from a tunnel section as a monitoring target, and configuring a tunnel section vibration transverse propagation characteristic monitoring system on the concerned section;
The vibration information on the vibration transverse propagation path of the track bed board 11-the track base 12-the tunnel backfill layer 13-the tunnel main body is collected through the transverse vibration monitoring optical cable 2, and the data demodulator receives the vibration information sent by the transverse vibration monitoring optical cable 2 and demodulates the vibration information into a demodulation signal to be sent to the background processor;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, judges whether the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal, and guides a working department to detect and maintain the track structure and the tunnel structure on the concerned section if the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal.
Further, the operation safety monitoring method further comprises the following steps:
The transverse vibration monitoring optical cable 2 also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; collecting vibration information on a transverse vibration propagation path of a track-tunnel-soil body-ground through the transverse vibration monitoring optical cable 2;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, and judges the influence degree of the transverse propagation of the vibration on the concerned section on the buildings along the lines so as to protect the buildings along the lines of the tunnels.
Further, the operation safety monitoring method further comprises the following steps:
The transverse vibration monitoring optical cable 2 also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; the vibration information generated by the tunnel surrounding engineering construction is obtained through the transverse vibration monitoring optical cable 2, the background processor judges the influence degree of the tunnel surrounding engineering construction on the tunnel surrounding rock and the tunnel main body according to the obtained vibration information generated by the tunnel surrounding engineering construction so as to protect the track traffic tunnel, for example, when the background processor judges that the tunnel surrounding engineering construction has destructive influence on the tunnel surrounding rock and the tunnel main body, relevant departments can be guided to intervene in time so as to take corresponding measures to reduce or eliminate the destructive influence, and the purpose of protecting the track traffic tunnel is achieved.
Example III
The track traffic tunnel and the operation safety monitoring method thereof provided in the second embodiment are further optimized.
In a preferred embodiment, as shown in fig. 3, longitudinal vibration monitoring optical cables 3 are respectively arranged on the rail units, the track bed plate 11, the track base 12 and the side walls of the tunnel main body, and the longitudinal vibration monitoring optical cables 3 are fiber bragg grating array vibration optical cables integrated with a plurality of fiber bragg grating vibration sensors and are continuously arranged in the tunnel along the longitudinal direction of the track.
The longitudinal vibration monitoring optical cable 3 is also a cable with a plurality of fiber grating vibration sensors integrated in a single optical cable, and the axis of the cable is parallel to the longitudinal direction of the rail.
Similarly, the longitudinal vibration monitoring optical cable 3 needs to be configured with a data demodulator, which is defined as the first fiber grating vibration demodulator in the first embodiment, and the data demodulator configured for the longitudinal vibration monitoring optical cable 3 is defined as the second fiber grating vibration demodulator in the present embodiment for convenience of distinction. The second fiber bragg grating vibration demodulator is used for receiving the information sent by the longitudinal vibration monitoring optical cable 3, demodulating the information into a demodulation signal and sending the demodulation signal to the background processor.
When the length of the track traffic tunnel is longer, for example, a subway tunnel, the number of the second fiber bragg grating vibration demodulators is preferably plural, so as to ensure the accuracy and reliability of the monitoring data. The second fiber bragg grating vibration demodulators are sequentially arranged at intervals in the longitudinal direction of the track, wherein preferably, each longitudinal vibration monitoring cable between two adjacent second fiber bragg grating vibration demodulators is connected with the two second fiber bragg grating vibration demodulators, namely, each second fiber bragg grating vibration demodulator can demodulate vibration information transmitted by each longitudinal vibration monitoring optical cable 3 in the interval. Preferably, each station is provided with a second fiber bragg grating vibration demodulator.
In one embodiment, the longitudinal vibration monitoring cable 3 on the rail unit is routed at the rail bottom surface, for example, the longitudinal vibration monitoring cable 3 is directly pressed by the rail bottom surface or by the iron pad bottom surface in the fastener assembly of each rail unit.
In one embodiment, a first longitudinal monitoring groove is formed in the track bed board 11 to embed the corresponding longitudinal vibration monitoring optical cable 3, the first longitudinal monitoring groove is filled with concrete, so as to ensure the fixation of the longitudinal vibration monitoring optical cable 3, and preferably, the first longitudinal monitoring groove is filled with high-strength and quick-setting concrete. Preferably, the longitudinal vibration monitoring optical cable 3 on the track bed 11 is arranged between two steel rails, preferably arranged in the center of the track bed 11, that is, the two steel rails are symmetrical relative to the longitudinal vibration monitoring optical cable 3, so that the accuracy of the monitoring result is ensured.
In one embodiment, a second longitudinal monitoring groove is formed in the track base 12 to embed the corresponding longitudinal vibration monitoring optical cable 3, and the second longitudinal monitoring groove is filled with concrete. Preferably, the longitudinal vibration monitoring optical cable 3 on the track base 12 is arranged on the top surface of the track base 12, and the distance from the side edge of the track base 12 is 0.08-0.15 m.
In one embodiment, a third longitudinal monitoring groove is formed in the side wall of the tunnel main body to embed the corresponding longitudinal vibration monitoring optical cable 3, and the third longitudinal monitoring groove is filled with concrete. (preferably, distance)
In a further preferred embodiment, the longitudinal vibration monitoring optical cable 3 is also disposed on the tunnel backfill layer 13, and a fourth longitudinal monitoring groove may be formed on the tunnel backfill layer 13 to embed the corresponding longitudinal vibration monitoring optical cable 3.
In a further preferred embodiment, the longitudinal vibration monitoring optical cable 3 is also arranged in the tunnel surrounding rock, and the longitudinal vibration monitoring optical cable 3 can be pre-buried in the tunnel surrounding rock during tunnel construction.
According to the rail transit tunnel provided by the embodiment, the longitudinal vibration monitoring optical cables 3 are respectively distributed on the rail units, the track bed plates 11, the track base 12 and the side walls of the tunnel main body, so that the propagation and attenuation rules of vibration in the rail units, the track bed plates 11, the track base 12 and the tunnel main body along the longitudinal direction of the track under the conditions of train passing and the like can be obtained, and the health monitoring of the structures of all parts of the tunnel by a working department is facilitated, for example, the fastener state, the rail state and the like can be well mastered; meanwhile, abnormal conditions such as foreign matter invasion and the like in the tunnel can be monitored in real time, so that potential safety hazards can be eliminated in time.
Correspondingly, in the operation safety monitoring method, vibration information generated by engineering construction around the tunnel can be acquired through the longitudinal vibration monitoring optical cable 3 in the surrounding rock of the tunnel so as to protect the track traffic tunnel; in particular, through the cooperation of the transverse vibration monitoring optical cable 2 and the longitudinal vibration monitoring optical cable 3 in the surrounding rock of the tunnel, the surrounding disturbance of the surrounding rock of the tunnel can be sensitively and accurately perceived, and the operation safety of the tunnel is effectively improved.
It is further preferable that the distribution form and the density of the fiber bragg grating vibration sensors contained in each of the longitudinal vibration monitoring optical cables 3 are the same, specifically, the nth fiber bragg grating vibration sensor of each of the longitudinal vibration monitoring optical cables 3 is located on the same tunnel cross section, that is, the 1 st fiber bragg grating vibration sensor of each of the longitudinal vibration monitoring optical cables 3 is located on the same tunnel cross section, and the 2 nd fiber bragg grating vibration sensor of each of the longitudinal vibration monitoring optical cables 3 is located on the same tunnel cross section. Based on the design, the vibration information of the rail unit, the rail bed plate 11, the rail base 12, the tunnel main body and the like can be respectively obtained on different cross sections of the tunnel, the transverse propagation and attenuation characteristics of the tunnel vibration can be monitored and analyzed to a certain extent, the health monitoring of the tunnel is facilitated, and especially, the data information on the transverse propagation path of the tunnel section vibration can be further enriched by combining the transverse propagation characteristic monitoring system for the tunnel section vibration in the first embodiment and the track traffic tunnel operation safety monitoring method in the second embodiment, so that the transverse propagation and attenuation characteristics of the tunnel section vibration can be mastered more accurately.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A tunnel section vibration transverse propagation characteristic monitoring system is characterized in that: the system comprises a transverse vibration monitoring optical cable and a data demodulator connected with the transverse vibration monitoring optical cable, wherein the data demodulator is used for receiving information sent by the transverse vibration monitoring optical cable, demodulating the information into a demodulation signal and sending the demodulation signal to a background processor;
The transverse vibration monitoring optical cable is an optical fiber grating array vibration optical cable integrated with a plurality of optical fiber grating vibration sensors; the axis of the transverse vibration monitoring optical cable is vertical to the longitudinal direction of the tunnel, and the transverse vibration monitoring optical cable transversely extends from the top surface of the ballast bed plate and is sequentially distributed through the side surface of the ballast bed plate of the passageway, the surface of the track base, the surface of the backfill layer of the tunnel and the side wall of the tunnel;
The transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel;
The transverse vibration monitoring optical cable is used for collecting vibration information on a transverse vibration propagation path of the track bed board, the track base, the tunnel backfill layer, the tunnel main body, the soil body and the ground;
The data demodulator is used for receiving the vibration information sent by the transverse vibration monitoring optical cable, demodulating the vibration information into a demodulation signal and sending the demodulation signal to the background processor;
The background processor is used for analyzing and obtaining the transverse propagation and attenuation characteristics of the vibration on the concerned section according to the obtained vibration information, judging whether the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal or not, and judging the influence degree of the transverse propagation of the vibration on the concerned section on the buildings along the line;
A longitudinal vibration monitoring optical cable is arranged in the tunnel surrounding rock, and the longitudinal vibration monitoring optical cable is a fiber grating array vibration optical cable integrated with a plurality of fiber grating vibration sensors and is continuously arranged in the tunnel surrounding rock along the longitudinal direction of the track; the background processor is also used for analyzing and judging the peripheral disturbance of the surrounding rock of the tunnel by combining vibration information monitored by the transverse vibration monitoring optical cable and the longitudinal vibration monitoring optical cable in the surrounding rock of the tunnel.
2. The tunnel segment vibration transverse propagation characteristic monitoring system according to claim 1, wherein: the data demodulator is arranged on the ground and is connected with the ground end of the transverse vibration monitoring optical cable.
3. The tunnel segment vibration transverse propagation characteristic monitoring system according to claim 1, wherein: the data demodulator is arranged on the side wall of the tunnel, and the cable section in the pipe arranged in the tunnel and the cable section outside the pipe arranged in the surrounding rock of the tunnel and extending into the main body of the tunnel are respectively connected with the data demodulator.
4. The tunnel segment vibration transverse propagation characteristic monitoring system according to claim 1, wherein: and correspondingly arranging vibration monitoring grooves on the track structure and the tunnel structure so as to embed the transverse vibration monitoring optical cable.
5. The tunnel segment vibration transverse propagation characteristic monitoring system according to claim 1, wherein: and a plurality of transverse vibration monitoring optical cables are longitudinally distributed along the tunnel.
6. The utility model provides a track traffic tunnel, includes tunnel main part, forms in the tunnel backfill layer of tunnel main part bottom and forms in ballastless track on the tunnel backfill layer, its characterized in that: a tunnel segment vibration transverse propagation characteristic monitoring system as claimed in any one of claims 1 to 5 is also provided.
7. The method for monitoring operation safety of a rail transit tunnel according to claim 6, comprising:
Selecting a concerned section from a tunnel section as a monitoring target, and configuring a tunnel section vibration transverse propagation characteristic monitoring system on the concerned section;
The data demodulator receives the vibration information sent by the transverse vibration monitoring optical cable, demodulates the vibration information into a demodulation signal and sends the demodulation signal to the background processor;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, judges whether the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal, and guides a working department to detect and maintain the track structure and the tunnel structure on the concerned section if the transverse propagation and attenuation characteristics of the vibration on the concerned section are abnormal.
8. The operational safety monitoring method of claim 7, further comprising:
The transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; collecting vibration information on a transverse vibration propagation path of a track, a tunnel, a soil body and the ground through the transverse vibration monitoring optical cable;
And the background processor analyzes and obtains the transverse propagation and attenuation characteristics of the vibration on the concerned section, and judges the influence degree of the transverse propagation of the vibration on the concerned section on the buildings along the lines so as to protect the buildings along the lines of the tunnels.
9. The operational safety monitoring method of claim 7, further comprising:
The transverse vibration monitoring optical cable also vertically penetrates out of the side wall of the tunnel and extends to the ground in surrounding rocks of the tunnel; and the background processor judges the influence degree of the tunnel surrounding engineering construction on the surrounding rock of the tunnel and the main body of the tunnel according to the vibration information generated by the obtained tunnel surrounding engineering construction so as to protect the track traffic tunnel.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374465A (en) * | 2014-11-18 | 2015-02-25 | 浙江大学城市学院 | Subway low-frequency vibration test device and method based on fiber bragg grating sensors |
| CN105303777A (en) * | 2015-11-13 | 2016-02-03 | 中铁二院工程集团有限责任公司 | Tunnel lining structure spalling and collapsing real-time monitoring and alarming system |
| CN107843195A (en) * | 2017-11-02 | 2018-03-27 | 中铁西南科学研究院有限公司 | A kind of active breaking belt tunnel structure DEFORMATION MONITORING SYSTEM and method |
| CN110160626A (en) * | 2019-05-30 | 2019-08-23 | 武汉理工大学 | Full-time universe grating array subway tunnel structure safety monitoring system |
| CN209470718U (en) * | 2019-03-22 | 2019-10-08 | 南京地铁集团有限公司 | A kind of fibre system being preset in shield tunnel |
| 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 |
| CN210264826U (en) * | 2020-01-15 | 2020-04-07 | 武汉智慧地铁科技有限公司 | Tunnel system with vibration detection function |
-
2021
- 2021-12-29 CN CN202111640130.8A patent/CN114323247B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374465A (en) * | 2014-11-18 | 2015-02-25 | 浙江大学城市学院 | Subway low-frequency vibration test device and method based on fiber bragg grating sensors |
| CN105303777A (en) * | 2015-11-13 | 2016-02-03 | 中铁二院工程集团有限责任公司 | Tunnel lining structure spalling and collapsing real-time monitoring and alarming system |
| CN107843195A (en) * | 2017-11-02 | 2018-03-27 | 中铁西南科学研究院有限公司 | A kind of active breaking belt tunnel structure DEFORMATION MONITORING SYSTEM and method |
| CN209904774U (en) * | 2019-01-28 | 2020-01-07 | 深圳大学 | Subway track monitoring system with long distance, high precision and switching |
| CN209470718U (en) * | 2019-03-22 | 2019-10-08 | 南京地铁集团有限公司 | A kind of fibre system being preset in shield tunnel |
| CN110160626A (en) * | 2019-05-30 | 2019-08-23 | 武汉理工大学 | Full-time universe grating array subway tunnel structure safety monitoring system |
| 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 |
| CN210264826U (en) * | 2020-01-15 | 2020-04-07 | 武汉智慧地铁科技有限公司 | Tunnel system with vibration detection function |
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