System and method for monitoring displacement of tunnel in strike-slip fault area

Abstract

The invention discloses a strike-slip fault area tunnel displacement monitoring system and monitoring method, and relates to the field of tunnel displacement monitoring, and the monitoring system comprises a first displacement sensor and a second displacement sensor which are fixedly installed on the outer wall of a tunnel expansion section, and a rigid member fixedly installed on the inner wall of the tunnel expansion section; a distance is formed between the first displacement sensor and the second displacement sensor; the rigid member is connected with the first displacement sensor and the second displacement sensor. The method is used for solving the problem that in the prior art, it is difficult to monitor the overall displacement of the expanded section of the tunnel penetrating through the strike-slip fault, and the purposes of accurately monitoring the overall displacement of the expanded section of the tunnel, improving the measurement efficiency, improving the deformation monitoring capacity of the tunnel structure penetrating through the strike-slip fault and ensuring the monitoring reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the field of tunnel displacement monitoring, and particularly to a monitoring system and method for the dislocation amount of tunnels in strike-slip fault zones. Background Art

[0002] For regions with extensive fault zones and large dislocation amplitudes (such as the western region of China), it is inevitable to cross active faults during the construction of railway tunnels. Fault activities are extremely likely to cause significant deformation of structures such as tunnels, endangering the safety of train operation. Therefore, how to effectively monitor the dislocation amount of cross-fault tunnels has become one of the important research contents that cannot be avoided during the tunnel construction in such regions. Faults can be divided into three basic forms according to their dislocation modes: normal faults, reverse faults, and strike-slip faults.

[0003] Among them, strike-slip faults are common at plate boundaries with frequent seismic activities and obvious surface features, and are relatively developed in the western region of China. Tunnels spanning strike-slip faults are vulnerable to shear forces, so the tunnel displacements are mainly vertical and horizontal; in the prior art, it is generally necessary to carry out construction treatment of enlarged cross-sections to reduce the dislocation interference, and there is still a lack of effective technical means for monitoring the dislocation amount at the enlarged cross-section positions of tunnels.

[0004] The prior art for the displacement monitoring of conventional tunnels is mainly divided into two types: non-contact monitoring and contact monitoring.

[0005] In the field of non-contact monitoring technology, the existing technologies mainly rely on the combination of cameras, laser sensors and targets, coupled with machine learning algorithms for tunnel displacement measurement. For example, the invention patent application with the application number 202210516879.X discloses "A Tunnel Displacement Monitoring Method and System", which uses targets and prisms as observation objects and conducts periodic monitoring based on the learning measurement results to obtain the deformation information of the tunnel perpendicular to the line of sight and the deformation information of the tunnel along the line of sight; the utility model patent with the application number 200820062675.9 discloses "A Tunnel Displacement Monitoring System Based on Image Sensors", which consists of a laser emission device, a target, an image sensor and a lens as a measurement unit, and obtains the overall displacement of the tunnel by measuring the relative displacement between each measurement unit; the utility model patent with the application number 202120505569.9 discloses "A Tunnel Displacement Monitoring Device Based on Image Sensors", which builds a monitoring platform and improves the measurement accuracy by analyzing multiple images collected by the image sensor; the invention patent application with the application number 202111661357.0 discloses "A Tunnel Displacement Monitoring System Based on Image Sensors", which installs several displacement monitoring mechanisms on a circular guide rail. When the vertical connecting rod rotates, the rebound push button switch is triggered, and then the CCD camera is started to take pictures and monitor when the tunnel is displaced; the invention patent application with the application number 202210780152.2 discloses "A Tunnel Monitoring and Measurement Intelligent Management System and Its Usage Method", which obtains the tunnel displacement deformation data in real time through infrared opposed photoelectric sensors. The data processing module, information input module and data sharing module network the entire tunnel detection; the utility model patent with the application number 202123338873.8 discloses "A Shield Tunnel Displacement Monitoring Device", which drives the laser emitter to translate or rotate relative to the reflector through a driving mechanism, and uses a measuring mechanism to measure the moving distance and rotation angle of the laser emitter; the invention patent application with the application number 201810871281.6 discloses "A Tunnel Displacement Detection System and Detection Calculation Method", which relies on multiple integrated laser ranging units installed on a vertical deflection control stepping motor to detect the distance between the ranging units, and based on this, monitors the tunnel displacement and uses a PLC transceiver module to send information to the upper computer unit.

[0006] In the field of contact monitoring technology: The utility model patent with the application number 201621077812.7 discloses "A Monitoring System for Railway Tunnel Displacement and Deformation". This system arranges fiber Bragg grating sensors on the tunnel wall, and the displacement change of the tunnel wall is reflected by the drift of the reflection wavelength of the fiber grating relative to the reference wavelength. This monitoring technology has the defects of single monitoring direction, complex measuring point arrangement, small monitoring range, complex calculation process and weak anti-interference ability.

[0007] It can be seen that the non-contact tunnel monitoring technology in the prior art is affected by unstable factors such as train vibration, dust, light, etc., which will affect the measurement accuracy and cannot achieve the ideal effect; while the existing contact tunnel monitoring technology is mostly single-direction displacement monitoring, with problems such as complex measuring point arrangement, small monitoring range, complex calculation process, and poor anti-interference ability.

[0008] In summary, strike-slip faults are prone to generate lateral and vertical displacements simultaneously. The existing tunnel displacement monitoring technology is difficult to meet the monitoring of the overall dislocation amount of the enlarged section of the tunnel crossing the strike-slip fault. The existing research results rely more on numerical analysis and model tests, lacking means to effectively monitor the overall displacement of the enlarged section of the tunnel crossing the strike-slip fault. Summary of the Invention

[0009] The present invention provides a monitoring system and a monitoring method for the dislocation amount of a tunnel in a strike-slip fault area to solve the problem that the prior art is difficult to monitor the overall dislocation amount of the enlarged section of the tunnel crossing the strike-slip fault, and to achieve the purpose of accurately monitoring the overall dislocation amount of the enlarged section of the tunnel, improving the measurement efficiency, improving the monitoring ability of the structural deformation of the tunnel crossing the strike-slip fault, and ensuring the monitoring reliability.

[0010] The present invention is realized through the following technical solutions:

[0011] A monitoring system for the dislocation amount of a tunnel in a strike-slip fault area includes a first displacement sensor and a second displacement sensor fixedly installed on the outer wall of the enlarged section of the tunnel, and a rigid member fixedly installed on the inner wall of the enlarged section of the tunnel; there is a spacing between the first displacement sensor and the second displacement sensor; the rigid member is connected to both the first displacement sensor and the second displacement sensor.

[0012] In view of the problem that in the existing technologies, whether non-contact monitoring or contact monitoring technologies are used, it is difficult to monitor the overall dislocation amount of the enlarged section of a tunnel passing through a strike-slip fault, the present invention first proposes a monitoring system for the dislocation amount of a tunnel in a strike-slip fault area. Those skilled in the art should understand that: the enlarged section of the tunnel has an outer wall and an inner wall, where the outer wall refers to the side close to the surrounding rock or soil after the tunnel is enlarged, and the inner wall refers to the side close to the inner space of the tunnel after the tunnel is enlarged. In the monitoring system of the present application, two displacement sensors are fixedly installed on the outer wall of the enlarged section of the tunnel, which are respectively defined as the first displacement sensor and the second displacement sensor; a rigid member is fixedly installed on the inner wall of the enlarged section of the tunnel. Among them, there is a spacing between the first displacement sensor and the second displacement sensor, which means that the two displacement sensors are not adjacent to each other, so as to ensure that there is an included angle between the two connecting lines formed by each of the two displacement sensors and the center of the tunnel section. The rigid member is connected to both the first displacement sensor and the second displacement sensor. Therefore, the first displacement sensor is used to monitor the relative displacement of the rigid member relative to the position where the first displacement sensor is located. Similarly, the second displacement sensor is used to monitor the relative displacement of the rigid member relative to the position where the second displacement sensor is located. It should be noted that in the present application, both the first displacement sensor and the second displacement sensor can be implemented by any existing sensing device that can achieve the required displacement monitoring function; in addition, the rigid member in the present application can adopt any shape and structure, and no specific limitation is made here; furthermore, the fixing of the first displacement sensor and the second displacement sensor on the outer wall of the enlarged section of the tunnel, and the fixing of the rigid member on the inner wall of the enlarged section of the tunnel, can all be achieved by any existing fixing method, such as anchoring, etc.

[0013] When the present application works specifically, the first displacement sensor and the second displacement sensor perform periodic sampling, compare and calculate the monitoring data of different sampling periods with the original data, and then obtain the displacement data of the tunnel along the transverse and vertical directions, and thus the overall dislocation amount of the enlarged section of the tunnel in the strike-slip fault area can be obtained.

[0014] It can be seen that compared with the prior art, the present application is applicable to the real-time monitoring of the enlarged section of the tunnel passing through the strike-slip fault, is not affected by unstable factors such as train vibration, dust, and light, can simply and quickly obtain the vertical and lateral displacement conditions of the tunnel, and obtain the overall displacement condition of the section. It has the advantages of simple structure, easy implementation, and adaptability to large-range displacement monitoring. At the same time, it also has strong anti-environmental interference ability, which is conducive to improving the deformation monitoring accuracy and efficiency of the tunnel in the strike-slip fault area, significantly improving the detection ability of the structural displacement monitoring of the tunnel in the strike-slip fault area, and significantly improving the reliability of the tunnel monitoring in the strike-slip fault area. And the present application can operate in the tunnel for a long time and realize the long-term monitoring of the enlarged section. Compared with the prior art that relies too much on numerical analysis and model test methods, it truly realizes the actual monitoring of the displacement condition of the enlarged section of the tunnel passing through the strike-slip fault, and has significant engineering value. In summary, the present application has made significant progress compared with the non-contact and contact tunnel monitoring technologies in the prior art.

[0015] In addition, when the present application is working specifically, any existing power supply method can be used to supply power to each electrical instrument and equipment, and the specific power supply method is not specifically limited here. For example, an external power supply, an internal power supply, or the use of new energy for auxiliary power supply (such as solar energy, geothermal energy, wind energy, etc.) are all applicable.

[0016] Further, the first displacement sensor and the second displacement sensor are both rope displacement sensors, and the starting ends of the ropes of the two rope displacement sensors are both fixed on the rigid member. In this solution, when the rigid member moves, both of the two rope displacement sensors can monitor its relative movement, and then determine the position of the moved rigid member, providing support for subsequent calculations. This solution uses rope displacement sensors, which can adapt to large-range displacements, can achieve higher-precision deformation monitoring, and improve the measurement efficiency. The rope displacement sensors used can be existing finished products, and their specific models are not specifically limited here.

[0017] Further, the first displacement sensor and the second displacement sensor are respectively fixed on two connecting plates, and the connecting plates are fixedly installed on the outer wall of the enlarged section of the tunnel. This solution can install the displacement sensors on the corresponding connecting plates in advance. During on-site operation, only the connecting plates need to be fixed on the outer wall of the enlarged section of the tunnel, which is not only convenient for quick installation and construction, but also convenient for the later maintenance and replacement of the sensors. Of course, the connecting plates in this solution need to be made of rigid materials; the fixing method of the connecting plates on the outer wall of the enlarged section of the tunnel can also be realized by any existing fixing method.

[0018] Further, it further includes an acquisition terminal that is signal-connected to both the first displacement sensor and the second displacement sensor, and is used to receive the monitoring data of the first displacement sensor and the second displacement sensor in real time or periodically, and transmit it externally. The installation position of the acquisition terminal is not limited here, and it can be preferably installed in an area close to the first displacement sensor or the second displacement sensor.

[0019] Further, it further includes a data transmission unit that is signal-connected to the acquisition terminal; the data transmission unit is used to receive the data sent by the acquisition terminal and transmit it to the corresponding server for data processing and subsequent calculations. The data transmission unit can use wired or wireless technology to achieve external data transmission, and its specific transmission method is not specifically limited here.

[0020] Based on the monitoring method for the tunnel offset amount in the strike-slip fault area of the monitoring system in this application, it includes the following steps:

[0021] S1. Install the first displacement sensor, the second displacement sensor and the rigid member, and determine the initial position;

[0022] S2. Establish a relative coordinate system and determine the initial coordinates of the rigid member;

[0023] S3. Start the first displacement sensor and the second displacement sensor for periodic sampling;

[0024] S4. Calculate the post-displacement coordinates of the rigid member based on each sampling result;

[0025] S5. Based on the post-displacement coordinates of the rigid member and the initial coordinates of the rigid member, obtain the tunnel offset amount.

[0026] When implementing this method specifically, first install the first displacement sensor, the second displacement sensor and the rigid member according to the system requirements. After installation, the initial positions of each can be obtained. At this time, establish a relative coordinate system and determine the initial coordinates of the rigid member for standby; then the system can be started to work, periodically collect the monitoring data of the first displacement sensor and the second displacement sensor, and calculate the post-displacement coordinates of the rigid member for each collected monitoring data. Furthermore, compare and analyze the post-displacement coordinates of the rigid member calculated each time with the initial coordinates of the rigid member, and the corresponding tunnel offset amount after each collection can be obtained; if the tunnel offset amount is 0, it can be considered that no offset has occurred; if the tunnel offset amount exceeds the set threshold, a warning message can be issued.

[0027] Those skilled in the art should understand that in this method, the initial positions and their corresponding coordinates of the first displacement sensor, the second displacement sensor and the rigid member are determined by the specified points on them; for example, specify a point on the rigid member, and the initial coordinates and the post-displacement coordinates both refer to the coordinates corresponding to this point.

[0028] Further, the method for establishing a relative coordinate system includes:

[0029] Taking the initial position of the first displacement sensor as the coordinate origin, and taking the line connecting the initial positions of the first displacement sensor and the second displacement sensor as the X-axis, a geometric coordinate system is established.

[0030] In the relative coordinate system established in this solution, the coordinates of the first displacement sensor and the second displacement sensor remain unchanged. Therefore, the coordinates of the rigid member before and after displacement can be accurately calculated.

[0031] Further, the initial coordinates of the rigid member are (X c , Y c ), which are determined by the following formula:

[0032]

[0033] Where: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BC is the straight-line distance between the second displacement sensor and the initial position of the rigid member; AC is the straight-line distance between the first displacement sensor and the initial position of the rigid member.

[0034] This solution can be understood as setting the position of the first displacement sensor as point A, the position of the second displacement sensor as point B, and the initial position of the rigid member as point C. Then AB is the length of the line connecting point A to point B, and BC and AC are the same.

[0035] Further, the coordinates of the rigid member after displacement are (X d , Y d ), which are calculated by the following formula:

[0036]

[0037] Where: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BD is the straight-line distance between the second displacement sensor and the current position of the rigid member; AD is the straight-line distance between the first displacement sensor and the current position of the rigid member.

[0038] This solution can be understood as setting the position of the first displacement sensor as point A, the position of the second displacement sensor as point B, and the current position of the rigid member as point D.

[0039] Further, in step S5, the specific method for obtaining the tunnel dislocation amount based on the coordinates of the rigid member after displacement and the initial coordinates of the rigid member includes:

[0040] S501. Taking (X c , Y c ), (X d , Y d) are respectively transformed into the geodetic coordinate system to obtain (X c′ , Y c′ ), (X d′ , Y d′ );

[0041] S502. Calculate the relative displacement of the inner and outer walls of the tunnel:

[0042] ΔX = X d′ - X c′

[0043] ΔY = Y d′ - Y c′

[0044] Where: ΔX is the lateral displacement of the tunnel, and ΔY is the vertical displacement of the tunnel;

[0045] S503. Synthesize the lateral displacement and the vertical displacement of the tunnel to obtain the overall displacement of the tunnel.

[0046] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0047] 1. The present invention provides a monitoring system and method for the displacement of a tunnel in a strike-slip fault zone, which is applicable to the real-time monitoring of the enlarged section of a tunnel passing through a strike-slip fault. It is not affected by unstable factors such as train vibration, dust, and light, and can simply and quickly obtain the vertical and lateral displacement conditions of the tunnel, and obtain the overall displacement condition of the section. It has the advantages of simple structure, easy implementation, and adaptability to large-range displacement monitoring.

[0048] 2. The present invention provides a monitoring system and method for the displacement of a tunnel in a strike-slip fault zone, which has strong anti-environmental interference ability, is beneficial to improving the deformation monitoring accuracy of the tunnel in the strike-slip fault zone, significantly improves the detection ability of the structural displacement monitoring of the tunnel in the strike-slip fault zone, and significantly improves the reliability of the tunnel monitoring in the strike-slip fault zone.

[0049] 3. The present invention provides a monitoring system and method for the displacement of a tunnel in a strike-slip fault zone, which can operate in the tunnel for a long time and realize the long-term monitoring of the enlarged section. Compared with the prior art that relies too much on numerical analysis and model tests, it truly realizes the actual monitoring of the displacement condition of the enlarged section of the tunnel passing through the strike-slip fault, and has significant engineering value.

[0050] 4. The present invention provides a monitoring system and method for the displacement of a tunnel in a strike-slip fault zone, which can adapt to large-range displacement, can realize higher-precision deformation monitoring, and improve the measurement efficiency. Description of the Drawings

[0051] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0052] Figure 1 is a schematic diagram of the system of a specific embodiment of the present invention;

[0053] Figure 2 is a schematic diagram of the installation position of a specific embodiment of the present invention;

[0054] Figure 3 is a flowchart of the method of a specific embodiment of the present invention;

[0055] Figure 4 is a schematic diagram of the point positions in the calculation process of a specific embodiment of the present invention;

[0056] Figure 5 is a schematic diagram of coordinate rotation in a specific embodiment of the present invention.

[0057] Marks in the drawings and corresponding component names:

[0058] 11 - First displacement sensor, 12 - Second displacement sensor, 13 - Rigid member, 14 - Outer wall of the enlarged cross-section of the tunnel, 15 - Inner wall of the enlarged cross-section of the tunnel, 16 - Connection plate. Specific embodiments

[0059] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention. In the description of this application, it should be understood that orientation or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of this application.

[0060] Embodiment 1:

[0061] Such as Figure 1 And Figure 2 shown, a monitoring system for the dislocation amount of a tunnel in a strike-slip fault zone includes a first displacement sensor 11 and a second displacement sensor 12 fixedly installed on the outer wall of the enlarged cross-section of the tunnel, and a rigid member 13 fixedly installed on the inner wall of the enlarged cross-section of the tunnel; there is a spacing between the first displacement sensor 11 and the second displacement sensor 12; the rigid member 13 is connected to both the first displacement sensor 11 and the second displacement sensor 12.

[0062] In this embodiment, the first displacement sensor 11 and the second displacement sensor 12 both adopt large-range wire-pulling displacement sensors, and the starting ends of the wires of the two large-range wire-pulling displacement sensors are fixedly tied to the rigid member 13. The rigid member 13 can preferably be realized by using a steel column.

[0063] This embodiment further includes:

[0064] Data acquisition unit: It includes an acquisition terminal that is signal-connected to both the first displacement sensor 11 and the second displacement sensor 12. The acquisition terminal can be installed at the enlarged cross-section of the tunnel to perform periodic data acquisition and transmission. After each acquisition and transmission task is completed, the acquisition terminal enters the sleep state until the start of the next cycle. In this embodiment, it is preferably realized by using a multi-channel Lora acquisition terminal.

[0065] Data transmission unit: It is signal-connected to the acquisition terminal and can be installed at the tunnel entrance; it is in the normally open mode, continuously receives the data sent by the acquisition terminal, and transmits it to the server for processing. In this embodiment, it is preferably realized by using a Lora wireless gateway module.

[0066] Server: It is signal-connected to the data transmission unit and is used to receive data. The server can be realized by using a PC, a tablet computer, a smart phone, a cloud host, etc.

[0067] In this embodiment, the first displacement sensor 11 and the second displacement sensor 12 can communicate with the acquisition terminal in a wired or wireless manner; the data transmission unit and the server preferably communicate in a wireless manner, such as 4G / 5G or other wireless communication technologies.

[0068] In a more preferred embodiment, it further includes:

[0069] Power supply unit, including a storage battery, which is used to supply power to each electrical device in the system to ensure that the monitoring system can operate for a long time under the condition of lack of power supply in the tunnel. Preferably, the power supply unit can further include a solar panel arranged outside the tunnel to supplement electric energy for the storage battery and reduce carbon emissions.

[0070] In a more preferred embodiment, the first displacement sensor 11 and the second displacement sensor 12 are respectively fixed on two connecting plates 16, and the connecting plates 16 are fixedly installed on the outer wall of the enlarged cross-section of the tunnel.

[0071] Embodiment 2:

[0072] A method for monitoring the displacement difference of a tunnel in a strike-slip fault zone, as Figure 3 shown, includes the following steps:

[0073] S1. Install the first displacement sensor 11, the second displacement sensor 12 and the rigid member 13, and determine the initial position. Let the position where the first displacement sensor 11 is located be point A, the position where the second displacement sensor 12 is located be point B, and the initial position of the rigid member 13 be point C.

[0074] S2. Establish a relative coordinate system: Take point A as the coordinate origin, and take the straight line where the AB connection is located as the X-axis to establish a relative coordinate system.

[0075] Determine the initial coordinates (X c , Y c ) of the rigid member in the relative coordinate system as:

[0076]

[0077] In the formula: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BC is the straight-line distance between the second displacement sensor and the initial position of the rigid member; AC is the straight-line distance between the first displacement sensor and the initial position of the rigid member.

[0078] S3. Start the first displacement sensor 11 and the second displacement sensor 12 for periodic sampling.

[0079] S4. Let the current position where the rigid member is located be point D. Based on the results of each sampling, calculate the coordinates (X d , Y d ) of the rigid member after displacement as:

[0080]

[0081] In the formula: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BD is the straight-line distance between the second displacement sensor and the current position of the rigid member; AD is the straight-line distance between the first displacement sensor and the current position of the rigid member.

[0082] The distribution of points A, B, C, and D can be referred to Figure 4 as shown.

[0083] S5. Based on the coordinates of the rigid member after displacement (i.e., the coordinates of point D) and the initial coordinates of the rigid member (i.e., the coordinates of point C), obtain the tunnel offset amount. The specific process is as follows:

[0084] S501. Convert (X c , Y c ), (X d , Y d ) to the geodetic coordinate system respectively to obtain (X c′ , Y c′ ), (X d′ , Y d′); Point A is still used as the coordinate origin in the aforementioned geodetic coordinate system.

[0085] In this embodiment, the conversion from the relative coordinate system to the geodetic coordinate system is achieved through coordinate rotation. As Figure 5 shown, after rotating the coordinates of point C and point D, the coordinates (X c′ , Y c′ ) and (X d′ , Y d′ ) of point C' and D' in the geodetic coordinate system are obtained respectively. The coordinate rotation formula is as follows:

[0086]

[0087] In the formula: θ is the angle between the X-axis of the relative coordinate system and the X-axis of the geodetic coordinate system.

[0088] S502. Calculate the relative displacement of the inner and outer walls of the tunnel:

[0089] ΔX = X d′ - X c′

[0090] ΔY = Y d′ - Y c′

[0091] In the formula: ΔX is the lateral displacement of the tunnel, and ΔY is the vertical displacement of the tunnel;

[0092] S503. Synthesize the lateral displacement and the vertical displacement of the tunnel to obtain the overall displacement of the tunnel.

[0093] Embodiment 3:

[0094] A monitoring terminal for the displacement of a tunnel in a strike-slip fault zone includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method steps described in Embodiment 2 are implemented.

[0095] Exemplarily, the monitoring terminal can be a computing device such as a desktop computer, a laptop computer, a palm computer, and a cloud server. The computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor.

[0096] If the modules / units integrated in the monitoring terminal are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, all or part of the processes in the above-described method embodiments of the present invention can also be implemented by a computer program stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described method embodiments can be implemented. Among them, the computer program includes computer program code, object code form, executable files, or some mature intermediate forms, etc.

[0097] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0098] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. In addition, the term "connected" used in this text, without special instructions, can be directly connected or indirectly connected via other components.

Claims

1. A monitoring system for the displacement of a tunnel in a strike-slip fault zone, characterized in that, It includes a first displacement sensor (11) and a second displacement sensor (12) fixedly installed on the outer wall of the enlarged cross-section of the tunnel, and a rigid member (13) fixedly installed on the inner wall of the enlarged cross-section of the tunnel; there is a spacing between the first displacement sensor (11) and the second displacement sensor (12); the rigid member (13) is connected to both the first displacement sensor (11) and the second displacement sensor (12).

2. The monitoring system for the offset amount of a tunnel in a strike-slip fault zone according to claim 1, wherein, Both the first displacement sensor (11) and the second displacement sensor (12) are cable displacement sensors, and the starting ends of the cables of the two cable displacement sensors are fixed on the rigid member (13).

3. The monitoring system for the offset amount of a tunnel in a strike-slip fault zone according to claim 1, wherein, The first displacement sensor (11) and the second displacement sensor (12) are respectively fixed on two connecting plates (16), and the connecting plates (16) are fixedly installed on the outer wall of the enlarged cross-section of the tunnel.

4. The monitoring system for the offset amount of a tunnel in a strike-slip fault zone according to claim 1, wherein It also includes an acquisition terminal that is signal-connected to both the first displacement sensor (11) and the second displacement sensor (12).

5. The monitoring system for the offset amount of a tunnel in a strike-slip fault zone according to claim 4, characterized in that, It also includes a data transmission unit that is signal-connected to the acquisition terminal.

6. A method for monitoring the offset of a tunnel in a strike-slip fault zone of a strike-slip fault zone tunnel offset monitoring system according to any one of claims 1 to 5, characterized in that, It includes the following steps: S1. Install the first displacement sensor (11), the second displacement sensor (12) and the rigid member (13), and determine the initial position; S2. Establish a relative coordinate system and determine the initial coordinates of the rigid member; S3. Start the first displacement sensor (11) and the second displacement sensor (12) to perform periodic sampling; S4. Calculate the post-displacement coordinates of the rigid member based on the results of each sampling; S5. Based on the post-displacement coordinates of the rigid member and the initial coordinates of the rigid member, obtain the tunnel dislocation amount.

7. The method for monitoring the offset amount of a tunnel in a strike-slip fault zone according to claim 6, wherein The method for establishing the relative coordinate system includes: Taking the initial position of the first displacement sensor (11) as the coordinate origin and the line connecting the initial positions of the first displacement sensor (11) and the second displacement sensor (12) as the X-axis, establish a geometric coordinate system.

8. The method for monitoring the displacement of a tunnel in a strike-slip fault zone according to claim 6, wherein, The initial coordinates of the rigid member are (X c , Y c ), which are determined by the following formula: In the formula: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BC is the straight-line distance between the second displacement sensor and the initial position of the rigid member; AC is the straight-line distance between the first displacement sensor and the initial position of the rigid member.

9. The method for monitoring the offset amount of a tunnel in a strike-slip fault zone according to claim 8, wherein The coordinates of the rigid member after displacement are (X d , Y d ), which are calculated by the following formula: In the formula: AB is the straight-line distance between the first displacement sensor and the second displacement sensor; BD is the straight-line distance between the second displacement sensor and the current position of the rigid member; AD is the straight-line distance between the first displacement sensor and the current position of the rigid member.

10. The method for monitoring the displacement of a tunnel in a strike-slip fault zone according to claim 9, characterized in that, Step S5 specifically includes: S501. Convert (X c , Y c ) and (X d , Y d ) to the geodetic coordinate system respectively to obtain (X c′ , Y c′ ) and (X d′ , Y d′ ); S502. Calculate the relative dislocation amount between the inner and outer walls of the tunnel: ΔX = X d′ -X c′ ΔY = Y d′ -Y c′ In the formula: ΔX is the lateral dislocation amount of the tunnel, and ΔY is the vertical dislocation amount of the tunnel; S503. Synthesize the lateral displacement and the vertical displacement of the tunnel to obtain the overall dislocation amount of the tunnel.

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