A synchronous monitoring system and construction method for tunnel surrounding rock deformation and support deformation

Abstract

The present application discloses a synchronous monitoring system and construction method for tunnel surrounding rock deformation and support deformation. The system includes a vision unit and multiple groups of displacement acquisition modules; the multiple groups of displacement acquisition modules are evenly arranged on the support, and each displacement acquisition module includes an internal displacement component and an external displacement component; the external displacement component is fixedly installed on the support for monitoring the deformation of the support, and the internal displacement component is movably installed inside the external displacement component and contacts the surrounding rock, thereby monitoring the deformation of the surrounding rock; the vision unit is installed at a fixed point and synchronously acquires the displacement amounts of the internal displacement component and the external displacement component. The construction method is used for installing the above system. The beneficial effects of the present application are as follows: The present application can simultaneously measure the deformation changes of the inner and outer two-layer structures, and then realize the deformation measurement of the inner and outer two-layer structures, providing necessary information for practitioners. At the same time, the present application clarifies the installation points of the vision unit, eliminating the need for manual handling by monitoring personnel and reducing labor consumption.

Description

Technical Field

[0001] This application relates to the technical field of tunnel construction, and in particular to a synchronous monitoring system for tunnel surrounding rock deformation and support deformation. Background Art

[0002] At present, the tunnel deformation monitoring technology based on image recognition during tunnel construction can only identify the deformation of the outermost structure, and cannot identify the contact situation between structural layers only by deformation, which is prone to missing the detection of interlayer cavities and resulting in potential risks for the structure. The current methods for detecting interlayer cavities include ground penetrating radar, three-dimensional laser scanning, manual tapping method, thermal imaging technology, and borehole inspection method. The ground penetrating radar method is greatly affected by steel structures inside the structure, requires very strong experience to judge, and has a high misjudgment rate. Three-dimensional laser scanning predicts the internal contact situation based on shallow surface deformation. The manual tapping method and borehole inspection method are not suitable for large-scale inspections. At the same time, the harsh monitoring conditions inside the tunnel during construction often cause the monitoring equipment to be unable to stably and continuously obtain data, and require monitoring personnel to manually carry it, which not only consumes manpower, but also affects the accuracy of monitoring data. Summary of the Invention

[0003] One of the purposes of this application is to provide a synchronous monitoring system for tunnel surrounding rock deformation and support deformation that can solve at least one of the defects in the above background art.

[0004] To achieve at least one of the above purposes, the technical solution adopted in this application is: A synchronous monitoring system for tunnel surrounding rock deformation and support deformation, including a visual unit and multiple groups of displacement acquisition modules; multiple groups of the displacement acquisition modules are evenly arranged on the support, and the displacement acquisition module includes an inner displacement component and an outer displacement component; the outer displacement component is fixedly installed on the support to monitor the deformation of the support, and the inner displacement component is movably installed inside the outer displacement component and contacts the surrounding rock, thereby monitoring the deformation of the surrounding rock; the visual unit is fixedly installed at a fixed point and synchronously acquires the displacement amounts of the inner displacement component and the outer displacement component.

[0005] Preferably, the inner displacement component includes an inner sleeve and a top plate; the inner sleeve is elastically slidably installed inside the outer displacement component and extends the acquisition part provided at the second end out of the outer displacement component, and then the visual unit acquires the displacement of the acquisition part; the top plate is installed at the first end of the inner sleeve and is adapted to abut against the surrounding rock.

[0006] Preferably, the top plate is in threaded cooperation with the inner sleeve through an adjusting screw rod fixedly provided.

[0007] Preferably, an adjusting nut is threadedly connected to the inner sleeve; the adjusting screw rod is movably matched with the inner sleeve and threadedly connected to the adjusting nut.

[0008] Preferably, an extension rod serving as the collection part is fixedly installed at the second end of the inner sleeve. A spring is sleeved outside the extension rod, and two ends of the spring respectively abut against the inner sleeve and the outer displacement assembly, so that the inner displacement assembly is elastically slidably arranged.

[0009] Preferably, the outer displacement assembly includes an outer sleeve and a base that are fixedly connected to each other; the displacement collection module is fixedly installed on the support through the base; the inner displacement assembly is installed in the outer sleeve and elastically slidably cooperates with the base.

[0010] Preferably, the displacement collection module further includes a first target and a second target; the first target is fixedly installed on the base, and the second target is fixedly installed on the extension rod extending out of the base; the vision unit collects the displacements of the first target and the second target.

[0011] Preferably, multiple groups of the displacement collection modules are arranged at intervals along the construction direction of the tunnel, and multiple displacement collection modules in each group are arranged at equal intervals along the arc contour direction of the tunnel cross-section; multiple vision units are provided, and for the displacement collection modules exceeding the set distance, the displacements are collected through the independently corresponding vision units.

[0012] Preferably, the vision unit is fixedly installed on the waterproof board trolley and moves synchronously with the waterproof board trolley.

[0013] A construction method of the above tunnel surrounding rock deformation and support deformation synchronous monitoring system includes the following steps:

[0014] S100: Assemble the inner displacement assembly and the outer displacement assembly in the assembly workshop to obtain the displacement collection module;

[0015] S200: During the installation process of the tunnel support, fixedly install the displacement collection module on the steel arch of the support and adjust the displacement collection module until the inner displacement assembly closely adheres to the surrounding rock;

[0016] S300: Block the installation positions of the targets of the displacement collection module, and spray concrete covering the support on the surrounding rock;

[0017] S400: Install the targets after the concrete spraying and install a set number of vision units at the waterproof board trolley according to the requirements.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] This application can simultaneously measure the deformation changes of the inner and outer layer structures, and then achieve the deformation measurement of the inner and outer layer structures, providing necessary information for practitioners. At the same time, this application clarifies the installation positions of the vision units, eliminating the need for the monitoring personnel to manually carry them, thus reducing the labor consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the installation structure of this application.

[0021] Figure 2 It is a schematic diagram of the steel arch support structure.

[0022] Figure 3 It is a schematic diagram of the structure of the displacement acquisition module in this application.

[0023] Figure 4 It is a schematic diagram of the disassembled state of the displacement acquisition module in this application.

[0024] Figure 5 It is a schematic diagram of the partial sectional structure of the displacement acquisition module in this application Figure 1 .

[0025] Figure 6 It is a schematic diagram of the partial sectional structure of the displacement acquisition module in this application Figure 2 .

[0026] In the figure: surrounding rock 100, steel arch 200, installation position 201, displacement acquisition module 3, outer displacement component 31, base 311, first threaded hole 3110, outer sleeve 312, inner displacement component 32, inner sleeve 321, top plate 322, adjusting nut 323, adjusting screw 3231, extension rod 324, second threaded hole 3240, spring 33, first target 341, second target 342, vision unit 4, waterproof board trolley 500. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, in combination with the specific embodiments, this application will be further described. It should be noted that in the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0028] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application 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 should not be construed as limiting the specific protection scope of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0030] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] The terms "including" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0033] One aspect of the present application provides a synchronous monitoring system for tunnel surrounding rock deformation and support deformation, as Figure 1 and Figure 2As shown, one preferred embodiment includes a visual unit 4 and multiple groups of displacement acquisition modules 3; the multiple groups of displacement acquisition modules 3 are evenly arranged on the support. The displacement acquisition module 3 includes an inner displacement component 32 and an outer displacement component 31; the outer displacement component 31 is fixedly installed on the support so that the deformation of the support can be displayed through the outer displacement component 31, that is, the outer displacement component 31 monitors the deformation of the support; the inner displacement component 32 is movably installed inside the outer displacement component 31 and contacts the surrounding rock 100. Furthermore, the deformation of the surrounding rock 100 will be displayed through the inner displacement component 32, that is, the inner displacement component 32 monitors the deformation of the surrounding rock 100. The visual unit 4 is fixedly installed and synchronously acquires the displacement amounts of the inner displacement component 32 and the outer displacement component 31.

[0034] It should be known that during tunnel construction, in order to ensure the safety of tunnel construction, it is necessary to build a support structure on the surface of the tunnel surrounding rock 100 after excavation for support. The main structure of the support includes a steel arch 200 and concrete, that is, first arrange the steel arch 200 according to the arched structure of the surrounding rock 100, and then spray concrete on the surface of the surrounding rock 100. After the concrete hardens, it can form a support structure with the steel arch 200. When dividing the structure, the surrounding rock 100 can be regarded as a deep structure, and the support can be regarded as a shallow structure; if the deformation degrees of the surrounding rock 100 and the support are different, then a cavity will be formed between the surrounding rock 100 and the support, which will lead to a weakening of the support capacity of the support, and thus affect the safety of tunnel construction.

[0035] Due to the existence of the concrete structure of the support, the surrounding rock 100 is blocked and it is difficult to measure its deformation degree. And this embodiment sets up the displacement acquisition module 3 to solve this problem; among them, the function of the outer displacement component 31 is to feedback the deformation of the support, and at the same time, the outer displacement component 31 shields the inner displacement component 32 to ensure that during the construction of the support structure, the concrete will only be connected to the outer displacement component 31 and will not interfere with the inner displacement component 32. After being protected by the outer displacement component 31, the inner displacement component 32 can perform corresponding displacements under the action of the deformation force of the surrounding rock 100. Furthermore, the visual unit 4 can respectively acquire the displacements of the outer displacement component 31 and the inner displacement component 32. After completing the acquisition of the displacement, compare the displacement amounts of the inner displacement component 32 and the outer displacement component 31. If the displacement amount of the inner displacement component 32 is less than the deformation amount of the outer displacement component 31, it means that the settlement degree of the support is greater than the settlement degree of the surrounding rock 100. Furthermore, a cavity may be formed between the support and the surrounding rock 100; then an alarm can be given and the maintenance personnel can be notified to reconstruct the support at this position.

[0036] In this embodiment, there are various specific structures of the inner displacement component 32 that can achieve the above functions. For the convenience of understanding, one of the structures will be described in detail below. As Figure 4 andFigure 5 As shown, the inner displacement component 32 includes an inner sleeve 321 and a top plate 322; the inner sleeve 321 is elastically and slidably installed inside the outer displacement component 31, and the acquisition part provided at the second end extends out of the outer displacement component 31, and then the vision unit 4 performs displacement acquisition on the acquisition part. The top plate 322 is installed at the first end of the inner sleeve 321 and can abut against the surrounding rock 100. Through the setting of the top plate 322, the contact area with the surrounding rock 100 can be increased, so as to ensure that the surrounding rock 100 can stably transfer the deformation to the top plate 322.

[0037] It should be known that the outer displacement component 31 can be regarded as being fixed to the support. Then, the position change of the inner displacement component 32 relative to the outer displacement component 31 can be regarded as the difference in the relative deformation amount between the support and the surrounding rock 100. From the structure of the tunnel, the surrounding rock 100 can be regarded as being above the support. Therefore, the movement of the inner sleeve 321 driven by gravity is in the direction away from the surrounding rock 100, and the movement of the inner sleeve 321 in this direction under the action of gravity will affect the actual displacement deformation amount of the surrounding rock 100. Therefore, the inner sleeve 321 needs to be elastically and slidably installed, and the elastic force is used to offset the gravity of the inner sleeve 321, so that the inner sleeve 321 can only have a relative displacement under the action of the deformation force of the surrounding rock 100. It should be noted that the deformation force generated by the surrounding rock 100 is much greater than the elastic force received by the inner sleeve 321. Therefore, the influence of the elastic force received by the inner sleeve 321 on the deformation caused by the extrusion of the surrounding rock 100 can be ignored.

[0038] It should also be known that since the structure of the surrounding rock 100 is not uniform, it is easy to cause different distances between the surrounding rock 100 at different positions and the corresponding position of the steel arch 200 of the support. Therefore, in order to ensure the measurement accuracy of the deformation of the surrounding rock 100 at different positions, it is necessary to ensure that the installation position of the inner sleeve 321 is adjustable; in this embodiment, since the inner sleeve 321 is elastically and slidably arranged through a spring 33, within the elastic limit of the spring 33, the installation position of the inner sleeve 321 can be adjusted through the deformation amount of the spring 33 to ensure that the inner sleeve 321 can be closely attached to the surrounding rock 100.

[0039] It can be understood that, in order to further ensure that the surrounding rock 100 can stably transfer the deformation to the roof 322, the elastic coefficient of the spring 33 is relatively high, which results in a relatively short total deformation of the spring 33, that is, the adaptability of the inner sleeve 321 to different surrounding rocks 100 is weak. Therefore, in this embodiment, in order to increase the adaptability of the inner displacement component 32 to the surrounding rocks 100 at different positions, an adjustment structure is provided between the inner sleeve 321 and the roof 322. Through the adjustment structure, the relative distance between the roof 322 and the inner sleeve 321 can be adjusted, thereby increasing the length of the entire inner displacement component 32. There are various specific structures of the adjustment structure that can achieve the foregoing functions. For the convenience of understanding, one of the structures will be described in detail below.

[0040] Specifically, as Figure 5 shown, a adjusting screw 3231 is fixedly installed on the side of the roof 322 away from contacting the surrounding rock 100. The roof 322 can be threadedly engaged with the inner sleeve 321 through the adjusting screw 3231. Thus, by rotating the roof 322, the extending length of the roof 322 relative to the inner sleeve 321 can be adjusted.

[0041] In this embodiment, as Figure 4 and Figure 5 shown, an adjusting nut 323 is threadedly connected to the inner sleeve 321; the adjusting screw 3231 is movably engaged with the inner sleeve 321 and threadedly connected to the adjusting nut 323.

[0042] It can be understood that the position adjustment of the roof 322 is generally driven by the staff directly manually rotating the roof 322. As the position of the roof 322 rises to a position close to the surrounding rock 100, the relative space between the roof 322 and the surrounding rock 100 is small, making it difficult for the staff to continue to adjust the position by manually rotating the roof 322. Therefore, in this embodiment, through the setting of the adjusting nut 323, only need to directly abut the roof 322 against the surrounding rock 100, and then rotate the adjusting nut 323 to move relative to the adjusting screw 3231 until it is screwed onto the first end of the inner sleeve 321.

[0043] In this embodiment, as Figure 4 and Figure 6 shown, an extension rod 324 serving as a collection part is fixedly installed at the second end of the inner sleeve 321. The outer displacement component 31 includes an outer sleeve 312 and a base 311 that are fixedly connected to each other; the displacement collection module 3 is fixedly installed on the support through the base 311; the inner sleeve 321 is installed in the outer sleeve 312 and is slidably connected to the base 311 through the extension rod 324. A spring 33 is sleeved outside the extension rod 324, and the two ends of the spring 33 respectively abut against the extension rod 324 and the base 311, so that the inner displacement component 32 is elastically slidably engaged with the base 311.

[0044] In this embodiment, in order to facilitate the acquisition of the displacement change amounts of the inner displacement component 32 and the outer displacement component 31 by the vision unit 4, targets for identification can be installed on both the inner displacement component 32 and the outer displacement component 31. Then, the vision unit 4 acquires the displacements of the targets to obtain the displacement change amounts of the inner displacement component 32 and the outer displacement component 31.

[0045] Specifically, as Figure 6 shown, the displacement acquisition module 3 further includes a first target 341 and a second target 342. A first threaded hole 3110 is provided at one end of the base 311 away from the surrounding rock 100, and a second threaded hole 3240 is provided at one end of the extension rod 324 away from the surrounding rock 100. The first target 341 is fixedly installed on the first threaded hole 3110 of the base 311 by threading, and the second target 342 is fixedly installed on the second threaded hole 3240 of the extension rod 324 extending out of the base 311 by threading. The vision unit 4 acquires the displacements of the first target 341 and the second target 342 to obtain the displacement change amounts of the inner displacement component 32 and the outer displacement component 31.

[0046] In this embodiment, as Figure 1 and Figure 2 shown, multiple groups of displacement acquisition modules 3 are arranged at intervals along the construction direction of the tunnel. A plurality of displacement acquisition modules 3 in each group are arranged at equal intervals along the arc-shaped contour direction of the tunnel cross-section, that is, a plurality of installation points 201 are arranged at equal intervals along the circumferential direction of the steel arch 200 for support, and the displacement acquisition module 3 can be installed at the corresponding installation points 201. A plurality of vision units 4 are provided. For the displacement acquisition modules 3 exceeding the set spacing, the displacement is acquired through the independently corresponding vision units 4.

[0047] It should be known that the construction length of the tunnel is generally relatively long. In order to accurately monitor the cavity situation between the surrounding rock 100 and the support, a group of displacement acquisition modules 3 need to be set at intervals of a set construction length. The specific interval construction length can be selected according to the actual needs of those skilled in the art, such as 20 meters or 30 meters, etc. Since the stress conditions of the surrounding rock 100 along its arch direction may vary, the number of displacement acquisition modules 3 in each group can be set to be multiple, and the multiple displacement acquisition modules 3 in each group can be arranged at equal intervals along the arch direction of the surrounding rock 100. The specific number of displacement acquisition modules 3 in each group can be selected according to the actual needs. For example, the specific number of displacement acquisition modules 3 in each group is 3; one displacement acquisition module 3 needs to be set at the crown, and the other two displacement acquisition modules 3 are arranged at a central angle interval of 45° on both sides of the crown.

[0048] It can be understood that the specific structure and working principle of the vision unit 4 are well-known technologies to those skilled in the art. A common vision unit 4 uses a camera, and the shooting accuracy of the camera gradually decreases as the shooting distance increases. At the same time, due to the high cost of the camera, for the displacement acquisition of multiple nearby displacement acquisition modules 3, it can be achieved by one vision unit 4. For the relatively distant displacement acquisition modules 3, in order to ensure the acquisition accuracy, independent vision units 4 will be used for acquisition and recognition. The specific distance setting between the vision unit 4 and the displacement acquisition module 3 for the above two acquisition methods can be selected according to the accuracy of the camera. For example, it can be set to 150 meters; that is, when the distance from the displacement acquisition module 3 to the vision unit 4 is greater than 150 meters, an independent vision unit 4 will be used for displacement acquisition.

[0049] It should be noted that the settlement of the surrounding rock 100 and the support will gradually tend to be stable as the construction time increases, that is, as the construction length increases, for the surrounding rock 100 and the support that are constructed first, it can be considered that there is no relative displacement change anymore, so displacement monitoring can be stopped. As the construction length increases, new supports and corresponding displacement acquisition modules 3 will be arranged in the newly constructed sections. If the position of the vision unit 4 is not fixed, then the vision unit 4 will not be able to continue to identify the displacement of the displacement acquisition module 3. Therefore, as Figure 1 shown, in this embodiment, the vision unit 4 is fixedly installed on the waterproof board trolley 500 and moves synchronously with the waterproof board trolley 500; thus, it can be ensured that as the construction progress increases, the vision unit 4 on the waterproof board trolley 500 can always identify the displacement of the newly installed displacement acquisition unit 3.

[0050] Another aspect of the present application provides a construction method for the above-mentioned synchronous monitoring system for tunnel surrounding rock deformation and support deformation, which specifically includes the following construction steps:

[0051] S100: Assemble the inner displacement component 32 and the outer displacement component 31 in the assembly workshop, and thus the required displacement acquisition module 3 can be obtained.

[0052] S200: During the installation of the tunnel support, fix the corresponding number of displacement acquisition modules 3 at the corresponding positions on the steel arch 200 of the support; then adjust the displacement acquisition module 3 so that the inner displacement component 32 is close to the surrounding rock 100.

[0053] S300: Seal the target installation positions of the displacement acquisition module 3 to prevent the blockage of the first threaded hole 3110 and the second threaded hole 3240 during subsequent concrete spraying; then spray concrete covering the steel arch 200 on the surrounding rock 100 to form a support, and finally open the first threaded hole 3110 and the second threaded hole 3240 and install the corresponding first target 341 and second target 342 respectively.

[0054] S400: After the concrete spraying is completed, a set number of vision units 4 are installed at the waterproof board trolley 500 as required. Then, the displacement of the first target 341 and the second target 342 is collected through the vision unit 4 to identify the deformation amount of the surrounding rock 100 and the support, so as to identify the cavity between the surrounding rock 100 and the support.

[0055] The foregoing describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A synchronous monitoring system for tunnel surrounding rock deformation and support deformation, characterized in that, It includes a vision unit and multiple groups of displacement acquisition modules; the multiple groups of displacement acquisition modules are evenly arranged on the support, and each displacement acquisition module includes an inner displacement component and an outer displacement component; the outer displacement component is fixedly installed on the support for monitoring the deformation of the support, and the inner displacement component is movably installed inside the outer displacement component and contacts the surrounding rock, so as to monitor the deformation of the surrounding rock; the vision unit is fixedly installed at a fixed point and synchronously acquires the displacement amounts of the inner displacement component and the outer displacement component. The support includes a steel arch and concrete. First, the steel arch is arranged according to the arched structure of the surrounding rock, and then the concrete is sprayed onto the surface of the surrounding rock. After the concrete hardens, it forms a support structure with the steel arch. The surrounding rock is a deep structure, and the support is a shallow structure. The inner displacement component includes an inner sleeve and a top plate; the inner sleeve is elastically slidably installed inside the outer displacement component and extends the acquisition part arranged at the second end out of the outer displacement component, so that the vision unit acquires the displacement of the acquisition part. The top plate is installed at the first end of the inner sleeve and is adapted to abut against the surrounding rock. The outer displacement component includes an outer sleeve and a base that are fixedly connected to each other; the displacement acquisition module is fixedly installed on the support through the base; the inner displacement component is installed inside the outer sleeve and is elastically slidably matched with the base. An extension rod serving as the acquisition part is fixedly installed at the second end of the inner sleeve, and a spring is sleeved outside the extension rod. The two ends of the spring respectively abut against the inner sleeve and the outer displacement component, so that the inner displacement component is elastically slidably arranged. The displacement acquisition module further includes a first target and a second target; the first target is fixedly installed on the base, and the second target is fixedly installed on the extension rod extending out of the base; the vision unit acquires the displacements of the first target and the second target.

2. The synchronous monitoring system for tunnel surrounding rock deformation and support deformation as described in claim 1, wherein The top plate is in threaded cooperation with the inner sleeve through an adjustable screw rod fixedly arranged.

3. The synchronous monitoring system for tunnel surrounding rock deformation and support deformation according to claim 2, wherein, An adjusting nut is threadedly connected to the inner sleeve; the adjustable screw rod is movably matched with the inner sleeve and threadedly connected to the adjusting nut.

4. The synchronous monitoring system for tunnel surrounding rock deformation and support deformation according to any one of claims 1-3, characterized in that, The multiple groups of displacement acquisition modules are arranged at intervals along the construction direction of the tunnel, and multiple displacement acquisition modules in each group are arranged at equal intervals along the arc-shaped contour direction of the tunnel cross-section; multiple vision units are provided. For the displacement acquisition modules exceeding the set distance, the displacements are acquired through the independently corresponding vision units.

5. The synchronous monitoring system for tunnel surrounding rock deformation and support deformation as described in claim 1, characterized in that, The vision unit is fixedly installed on the waterproof board trolley and moves synchronously with the waterproof board trolley.

6. A construction method of the synchronous monitoring system for tunnel surrounding rock deformation and support deformation according to any one of claims 1-5, characterized in that, It includes the following steps: S100: Assemble the inner displacement component and the outer displacement component in the assembly workshop to obtain the displacement acquisition module. S200: During the installation of the tunnel support, fixedly install the displacement acquisition module on the steel arch of the support and adjust the displacement acquisition module until the inner displacement component closely adheres to the surrounding rock. S300: Seal the installation positions of the targets of the displacement acquisition module, and spray the concrete covering the steel arch onto the surrounding rock. S400: Install the targets after the concrete spraying is completed, and install a set number of vision units at the waterproof board trolley according to the requirements.

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