A deformation monitoring device for tunnel support structure

Abstract

The present invention discloses a deformation monitoring device for a tunnel support structure, comprising an arc-shaped mounting frame, a first deformation monitor and a second deformation monitor. The arc-shaped mounting frame is arranged in the tunnel support structure, the first deformation monitor is arranged on the arc-shaped mounting frame and contacts the inner side surface of the tunnel support structure; the second deformation monitor is arranged on the arc-shaped mounting frame and is in slidable contact with the inner side surface of the tunnel support structure; the present invention arranges a deformation monitor on the inner side surface of the tunnel support structure, monitors pressure through the deformation monitor and adjusts the position of the deformation monitor, so as to quickly find the deformation point, thereby improving the accuracy and timeliness of deformation monitoring, determining the range of different deformation degrees, and improving the utilization rate of the monitoring instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel deformation monitoring, and in particular to a deformation monitoring device for a tunnel support structure. Background Art

[0002] Tunnel support structures are used to control the deformation of tunnel surrounding rocks. They are generally fixed in the tunnel to provide support for the inner side of the tunnel. In the relevant technology, it is necessary to monitor the deformation of the tunnel support structure in a timely manner according to the usage. At present, the most commonly used method is to inspect and observe the apparent deformation of the inner side of the support structure, and to monitor the flatness / inclination / displacement and other deformation conditions of the inner side of the support structure by arranging fixed monitoring points at a certain distance. At present, it is difficult to accurately locate the deformation range of the support structure and the distribution of the strong deformation area. The utilization rate of monitoring instruments in the non-deformation area is low, which increases the investment of ineffective costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the monitoring accuracy of the deformation range of the tunnel support structure is low and the utilization rate of the monitoring instrument in the non-deformation zone is low. The purpose is to provide a deformation monitoring device for the tunnel support structure to improve the accuracy of monitoring the deformation range of the support structure and the utilization rate of the monitoring instrument.

[0004] The present invention is achieved through the following technical solutions:

[0005] The tunnel support structure in the present invention is fixedly arranged in the tunnel and provides support force to the inner side of the tunnel. The present invention provides a deformation monitoring device for a tunnel support structure, the deformation monitoring device comprising a fixed monitoring component;

[0006] The fixed monitoring component comprises:

[0007] At least one arc-shaped mounting frame, which is arranged in the tunnel supporting structure along the circumference of the tunnel supporting structure, and the bottom ends of the arc-shaped mounting frames are fixedly connected to the bottom end of the tunnel supporting structure;

[0008] at least one first deformation monitor, which is fixedly mounted on the arc-shaped mounting frame, and a monitoring end of the first deformation monitor is in contact with the inner side surface of the tunnel support structure;

[0009] The first deformation monitor comprises:

[0010] A mounting sleeve connected to the arc-shaped mounting frame, wherein the central axis of the mounting sleeve is arranged along the radial direction of the tunnel;

[0011] A detection rod, a first end of which is disposed in the mounting sleeve, and a second end of which is pressed against the inner side surface of the tunnel support structure;

[0012] A mounting plate connected to the arc-shaped mounting frame via connecting bolts;

[0013] A pressure sensor fixedly connected to the mounting plate;

[0014] A compression spring is arranged in the installation sleeve, and a first end of the compression spring is connected to a first end of the detection rod, and a second end of the compression spring is connected to a monitoring end of the pressure sensor.

[0015] According to some embodiments of the present application, the detection rod includes:

[0016] A first sliding block, which is disposed in the mounting sleeve and can slide along the central axis of the mounting sleeve;

[0017] A rod body, a first end of which is fixedly connected to the first sliding block, and a second end of the rod body is pressed tightly against the inner side surface of the tunnel support structure;

[0018] The first deformation monitor also includes:

[0019] The second slider is arranged between the compression spring and the pressure sensor, the compression spring applies opposite pressing forces to the first slider and the second slider, and the second slider is arranged in the mounting sleeve and can slide along the central axis of the mounting sleeve.

[0020] A link sleeve is connected to the arc-shaped mounting bracket and is adapted to the link bolt, wherein the length of the link bolt is greater than the depth of the link sleeve.

[0021] According to some preferred embodiments of the present application, if there are multiple arc-shaped mounting frames, two adjacent arc-shaped mounting frames are fixedly connected by a reinforcing rod, and the bottom ends of the two adjacent arc-shaped mounting frames are fixedly connected with a support plate, and the support plate is fixedly connected to the bottom end of the tunnel support structure.

[0022] If there are multiple first deformation monitors, the distances between two adjacent first deformation monitors are equal.

[0023] According to some embodiments of the present application, the deformation monitoring device further includes:

[0024] An activity monitoring assembly is arranged between two adjacent arc-shaped mounting frames, and the activity monitoring assembly comprises:

[0025] A connecting support, connected to the arc-shaped mounting frame;

[0026] A movable support, which is slidably connected to the connecting support, and the movable support slides relative to the connecting support along the central axis of the tunnel;

[0027] A driving assembly, used for driving the movable support to slide on the connecting support;

[0028] A second deformation monitor is fixedly arranged on the movable support, and a monitoring end of the second deformation monitor contacts the inner side surface of the tunnel support structure. The structure of the second deformation monitor is the same as that of the first deformation monitor, and the mounting sleeve of the second deformation monitor is fixedly connected to the movable support.

[0029] According to some embodiments of the present application, the connecting support includes:

[0030] Adjustment parts;

[0031] Two fixing blocks connected to the arc-shaped mounting frame through the adjusting member;

[0032] A sliding rod is arranged along the central axis of the tunnel, and two ends of the sliding rod are respectively fixedly connected to the two fixing blocks, and a sliding hole for the sliding rod to pass through is arranged on the movable support.

[0033] According to some preferred embodiments of the present application, the adjusting member includes:

[0034] A connecting block, which is slidably connected to the arc-shaped mounting frame;

[0035] an articulated block, which is hinged to the connecting block;

[0036] An adjusting sleeve, which is fixedly connected to the hinge block;

[0037] A regulating unit, comprising:

[0038] A first screw, a first end of which is disposed in the adjusting sleeve and is threadedly connected to the adjusting sleeve;

[0039] A second screw rod, a first end of which is coaxially fixedly connected to the second end of the first screw rod through a rotating block, and the fixing block is provided with a threaded hole adapted to the second screw rod;

[0040] Wherein, the first screw and the second screw have opposite rotation directions.

[0041] According to some embodiments of the present application, the driving component includes:

[0042] A rotating support, which is fixedly connected to one of the fixed blocks;

[0043] An installation support fixedly connected to another of the fixing blocks;

[0044] A driving motor, which is fixedly connected to the mounting support;

[0045] A transmission screw is arranged parallel to the sliding rod, and the first end of the transmission screw is rotatably connected to the rotating support. A screw hole adapted to the transmission screw is provided on the movable support, and the second end of the transmission screw passes through the screw hole to be dynamically connected to the torque output shaft of the driving motor.

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

[0047] The present invention arranges a fixed monitoring component on the inner side of the tunnel support structure, and monitors the pressure of the tunnel support structure on a fixed position through a pressure sensor of the fixed monitoring component. When a slight deformation occurs, the deformation point can be quickly found through the pressure sensor, thereby improving the accuracy and timeliness of deformation monitoring.

[0048] The present invention also provides an active monitoring component that can move along the axial direction of the tunnel. The axial pressure of the tunnel support structure is detected by the active monitoring component, thereby realizing active monitoring of the deformation of different axial positions of the tunnel support structure, determining the range of different deformation degrees, and improving the utilization rate of the monitoring instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0050] Figure 1 It is a structural schematic diagram of a deformation monitoring device for a tunnel support structure according to the present invention.

[0051] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixed monitoring component according to the present invention.

[0052] Figure 3 It is a schematic diagram of the three-dimensional structure of the first deformation monitor according to the present invention.

[0053] Figure 4 It is a schematic diagram of the three-dimensional structure of the activity monitoring component according to the present invention.

[0054] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting support according to the present invention.

[0055] Figure 6 It is a schematic diagram of the three-dimensional structure of the second deformation monitor according to the present invention.

[0056] Figure 7 It is a schematic diagram of the three-dimensional structure of the adjusting member according to the present invention.

[0057] Figure 8 It is a schematic diagram of the three-dimensional structure of the adjusting part according to the present invention.

[0058] Reference numerals: 100-tunnel; 200-tunnel support structure; 300-fixed monitoring assembly; 310-arc mounting frame; 320-first deformation monitor; 321-mounting sleeve; 322-detection rod; 3221-rod body; 3222-first slider; 323-compression spring; 324-connecting bolt; 325-mounting plate; 326-pressure sensor; 327-second slider; 328-connecting sleeve; 329-limiting plate; 330-reinforcement rod; 340-support plate; 400-activity monitoring assembly; 410-connecting support; 411-fixed block; 412-sliding rod; 420-active support; 430-second deformation monitor; 440-rotating support; 450-mounting support; 460-driving motor; 470-transmission screw; 480-adjusting member; 481-connecting block; 482-hinge block; 483-adjusting sleeve; 484-adjusting part; 4841-first screw; 4842-second screw; 4843-rotating block; 485-positioning block. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0061] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0062] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0066] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Figure 1-8 The present invention is described in detail in conjunction with the embodiments.

[0067] Embodiment 1

[0068] like Figure 1-8 As shown, this embodiment provides a deformation monitoring device for a tunnel support structure.

[0069] The tunnel support structure 200 is fixedly arranged in the tunnel and provides support force to the inner side of the tunnel 100 . The deformation monitoring device includes a fixed monitoring component 300 . The fixed monitoring component 300 includes an arc-shaped mounting frame 310 and a first deformation monitor 320 .

[0070] At least one arc-shaped mounting frame 310 (two are taken as an example in this embodiment; if the length of the support structure is longer, the number of arc-shaped mounting frames 310 can be appropriately increased) is arranged inside the tunnel support structure 200 along the circumference of the tunnel support structure 200, and the bottom end of the arc-shaped mounting frame 310 is fixedly connected to the bottom end of the tunnel support structure 200.

[0071] If there are multiple arc-shaped mounting frames 310 , two adjacent arc-shaped mounting frames 310 are fixedly connected via a reinforcing rod 330 , and the bottom ends of the two adjacent arc-shaped mounting frames 310 are fixedly connected with a support plate 340 , which is fixedly connected to the bottom end of the tunnel support structure 200 .

[0072] It should be noted that the two ends of the reinforcing rod 330 are fixed to the side walls on the opposite side of the two arc-shaped mounting frames 310 by welding. The two arc-shaped mounting frames 310 are connected as one piece through the reinforcing rod 330, which effectively improves the strength of the arc-shaped mounting frames 310 and reduces the deformation of the arc-shaped mounting frames 310.

[0073] The bottom ends of the two arc-shaped mounting frames 310 are fixedly connected with support plates 340, which are fixed to the bottom ends of the arc-shaped mounting frames 310 by welding, and the support plates 340 are fixedly connected to the bottom ends of the tunnel support structures 200, which are fixed to the inside of the tunnel support structures 200 by anchor bolts, for facilitating the installation of the arc-shaped mounting frames 310.

[0074] At least one first deformation monitor 320 (twelve are taken as an example in this embodiment; if the arc length of the arc-shaped mounting frame 310 is longer, the number of the first deformation monitors 320 can be appropriately increased) is fixedly arranged on the arc-shaped mounting frame 310, and the monitoring end of the first deformation monitor 320 contacts the inner side surface of the tunnel support structure 200.

[0075] If there are multiple first deformation monitors 320, the distance between two adjacent first deformation monitors 320 is equal. By evenly distributing the first deformation monitors 320, the entire support structure can be monitored. At the same time, the distance between two adjacent first deformation monitors 320 can be increased or decreased according to specific circumstances.

[0076] In this embodiment, the deformation monitoring of the support structure is achieved by monitoring the pressure change of the first deformation monitor 320. Figure 3As shown, the first deformation monitor 320 includes a mounting sleeve 321 , a detection rod 322 , a mounting plate 325 , a pressure sensor 326 and a compression spring 323 .

[0077] The mounting sleeve 321 is fixedly connected to the arc-shaped mounting frame 310, and the central axis of the mounting sleeve 321 is arranged along the radial direction of the tunnel 100. A through hole can be arranged on the arc-shaped mounting frame 310, and then the mounting sleeve is placed in the through hole and fixedly connected by welding; or the mounting sleeve 321 can be directly welded to the arc-shaped mounting frame 310.

[0078] The mounting plate 325 is connected to the arc-shaped mounting frame 310 via a connecting bolt 324, and the pressure sensor 326 is fixedly connected to the mounting plate 325; similarly, a threaded hole can be set on the mounting plate 325, and the pressure sensor 326 is connected to the mounting plate 325 via a threaded hole, or it can be connected via other connection methods.

[0079] The compression spring 323 is arranged in the mounting sleeve 321, and the first end of the compression spring 323 is connected to the first end of the detection rod 322, the second end of the compression spring 323 is connected to the monitoring end of the pressure sensor 326, the first end of the detection rod 322 is arranged in the mounting sleeve 321, and the second end of the detection rod 322 is pressed against the inner side of the tunnel support structure 200.

[0080] The working principle here is: the compression spring 323 is in a compressed state, applying a clamping force to the detection rod 322 and the pressure sensor 326, and the positions of the arc-shaped mounting frame 310 and the tunnel support structure 200 are relatively fixed, and the second end of the detection rod 322 abuts against the inner side of the tunnel support structure 200. If the tunnel support structure 200 does not deform, the detection rod 322 does not move, the compression amount of the compression spring 323 does not change, and the pressure value detected by the pressure sensor 326 remains unchanged.

[0081] If the tunnel support structure 200 is deformed, the detection rod 322 moves, the compression amount of the compression spring 323 changes, the output pressing force changes, and the pressure value detected by the pressure sensor 326 changes, so that it can be concluded that deformation occurs here.

[0082] Embodiment 2

[0083] This embodiment is a further optimization of the first embodiment. The first embodiment has the following disadvantages: when the deformation monitoring device in the related art is in use, the initial pressure of the detection rod 322 on the pressure sensor 326 is not easy to adjust. Affected by the deformation during installation, different detection rods 322 extend out of the installation sleeve 321 to different lengths, which makes the initial pressure values ​​of different detection rods 322 on the pressure sensor 326 different. The operator needs to record them one by one, and then compare the initial values ​​at different places with the monitored values ​​to determine the deformation inside the tunnel 100.

[0084] This application has made relevant improvements based on the above determination, such as Figure 1 , Figure 2 , Figure 3 shown.

[0085] The detection rod 322 includes a first slider 3222 and a rod body 3221. The rod body 3221 and the first slider 3222 are an integrated structure. The first slider 3222 is disposed in the mounting sleeve 321 and can slide along the central axis of the mounting sleeve 321. The first end of the rod body 3221 is fixedly connected to the first slider 3222, and the second end of the rod body 3221 is pressed against the inner side of the tunnel support structure 200.

[0086] In order to prevent the first slider 3222 from sliding out of the mounting sleeve 321, a limiting plate 329 is fixedly connected to the inner wall of one end of the mounting sleeve 321. The limiting plate 329 and the mounting sleeve 321 are an integrated structure. The rod body 3221 slides through the limiting plate 329. The limiting plate 329 can block and limit the movement of the first slider 3222, thereby reducing the situation where the rod body 3221 is separated from the mounting sleeve 321.

[0087] In order to achieve the change of the pressure value, the first deformation monitor 320 further includes a second slider 327 and a connecting sleeve 328 , and the connecting sleeve 328 is fixedly connected to the arc-shaped mounting bracket 310 .

[0088] The second slider 327 is disposed between the compression spring 323 and the pressure sensor 326 . The compression spring 323 applies opposite pressing forces to the first slider 3222 and the second slider 327 . The second slider 327 is disposed in the mounting sleeve 321 and can slide along the central axis of the mounting sleeve 321 .

[0089] The second end of the compression spring 323 is pressed against the second slider 327, and the second slider 327 is pressed against the pressure sensor 326. The compression spring 323 is pressed against the pressure sensor 326 through the second slider 327, thereby increasing the pressing area of ​​the compression spring 323 and the pressure sensor 326, and at the same time making the compression spring 323 located in the mounting sleeve 321, thereby reducing the bending deformation of the compression spring 323.

[0090] The linking sleeve 328 is fixedly connected to the arc-shaped mounting bracket 310 and is adapted to the connecting bolt 324 . The length of the connecting bolt 324 is greater than the depth of the linking sleeve 328 .

[0091] One end of the connecting bolt 324 is threadedly connected to the connecting sleeve 328, which is convenient for fixing the connecting bolt 324 and the arc-shaped mounting frame 310. After the fixed monitoring assembly 300 is installed, when it is necessary to adjust the initial pressure value of the pressure sensor 326, the connecting bolt 324 is rotated to make the connecting bolt 324 withdraw or extend into the connecting sleeve 328, and the connecting bolt 324 drives the mounting plate 325 and the pressure sensor 326 to move, thereby adjusting the length of the compression spring 323, changing the elastic force of the compression spring 323, and at the same time, changing the pressing force of the compression spring 323 on the pressure sensor 326, adjusting the elastic force of the compression spring 323 on different first deformation monitors 320 to be consistent, so that the pressure of the compression spring 323 on the pressure sensor 326 is consistent, and then the initial values ​​on different pressure sensors 326 are consistent, reducing the situation where the operator records the initial values ​​on the pressure sensors 326 at different positions, and only needs to record the adjusted unified values, and at the same time, when the pressure sensors 326 at different positions are monitored, the range used by the pressure sensors 326 is consistent.

[0092] Embodiment 3

[0093] When the tunnel deformation is monitored by the device of the second embodiment, because the pressure sensors 326 are fixedly arranged at equal intervals along the axial direction of the tunnel, the monitored value can only determine the existence of deformation between two adjacent sensors in the axial direction of the tunnel, but cannot determine the specific situation of the axial deformation of the tunnel.

[0094] In response to the above problems, Figure 1 , Figure 3-8 As shown, the deformation monitoring device in this embodiment further includes an activity monitoring component 400 , and the activity monitoring component 400 is disposed between two adjacent arc-shaped mounting frames 310 .

[0095] The activity monitoring assembly 400 includes a connecting support 410 , a movable support 420 , a driving assembly and a second deformation monitor 430 . The driving assembly is used to drive the movable support 420 to slide on the connecting support 410 . The second deformation monitor 430 is fixedly disposed on the movable support 420 .

[0096] The connecting support 410 is connected to the arc-shaped mounting frame 310, the movable support 420 is slidably connected to the connecting support 410, and the movable support 420 slides along the central axis of the tunnel 100 relative to the connecting support 410. The connecting support 410 is set between the two fixed monitoring components 300, and the movable support 420 is driven by the driving component to drive the second deformation monitor 430 to move between the two fixed monitoring components 300, so that the axial deformation can be monitored.

[0097] The monitoring end of the second deformation monitor 430 contacts the inner side surface of the tunnel support structure 200. The structure of the second deformation monitor 430 is the same as that of the first deformation monitor 320. The installation method of the second deformation monitor 430 is the same as that of the first deformation monitor 320. The difference is that the mounting sleeve 321 of the second deformation monitor 430 is fixedly connected to the movable support 420, and the mounting sleeve 321 of the first deformation monitor 320 is fixedly connected to the arc-shaped mounting frame 310.

[0098] The connecting support 410 includes an adjusting member 480 , a fixing block 411 and a sliding rod 412 .

[0099] The two fixed blocks 411 are connected to the arc-shaped mounting frame 310 through the adjusting member 480, the sliding rod 412 is arranged along the central axis of the tunnel 100, and the two ends of the sliding rod 412 are respectively fixedly connected to the two fixed blocks 411, and the movable support 420 is provided with a sliding hole for the sliding rod 412 to pass through. To achieve the slidable connection between the movable support 420 and the connecting support 410, the number of the sliding rod 412 can be multiple, and in this embodiment, there are two.

[0100] The driving assembly includes a rotating support 440 , a mounting support 450 , a driving motor 460 and a driving screw 470 .

[0101] The rotating support 440 is fixedly connected to one of the fixed blocks 411, the mounting support 450 is fixedly connected to the other fixed block 411, the driving motor 460 is fixedly connected to the mounting support 450, the transmission screw 470 is arranged parallel to the sliding rod 412, and the first end of the transmission screw 470 is rotatably connected to the rotating support 440, and a screw hole adapted to the transmission screw 470 is provided on the movable support 420, and the second end of the transmission screw 470 passes through the screw hole and is dynamically connected to the torque output shaft of the driving motor 460.

[0102] The driving assembly drives the movable support 420 to slide along the slide rod 412 through the threaded screw structure. The working principle is: when the pressure sensor 326 on the first deformation monitor 320 detects deformation, the active monitoring assembly 400 in the corresponding area of ​​the pressure sensor 326 is started.

[0103] The starting process of the active monitoring component 400 is as follows: turn on the drive motor 460, the drive motor 460 drives the transmission screw 470 to rotate, and through the principle of threaded transmission, the transmission screw 470 drives the movable support 420 to slide along the slide rod 412. At the same time, the movable support 420 drives the second deformation monitor 430 to move, and the second deformation monitor 430 slides axially along the inner side surface of the tunnel support structure 200. The pressure sensor 326 on the second deformation monitor 430 monitors the axial deformation area of ​​the tunnel. Different deformation parameters are reflected by the pressure detected by the pressure sensor 326, and then the specific deformation condition of the axial direction of the tunnel can be judged.

[0104] In addition, in order to reduce friction, a hemispherical structure is provided at the second end of the detection rod 322 of the second deformation monitor 430 , and one end of the hemispherical structure of the detection rod 322 is pressed against the inner side surface of the tunnel support structure 200 .

[0105] Embodiment 4

[0106] In the movable pressure monitoring component of Example 4, affected by the installation and installation deformation, the initial value of the tunnel axial pressure monitored in the movable pressure monitoring component is not easy to adjust to a uniform value. When the pressure of the pressure sensor 326 reacts to the deformation at different locations, it is necessary to compare the initial pressures at different locations, and then compare and judge the pressure differences at different locations, and then judge the specific deformation of the tunnel axial direction.

[0107] In order to solve the above problems, the present embodiment further optimizes the adjusting member 480 , and the adjusting member 480 includes a connecting block 481 , a hinge block 482 , an adjusting sleeve 483 and an adjusting portion 484 .

[0108] The connecting block 481 is fixedly connected to the arc-shaped mounting frame, the hinge block 482 is hinged to the connecting block 481, and the adjusting sleeve 483 is fixedly connected to the hinge block 482; the angle between the adjusting sleeve 483 and the arc-shaped mounting frame 310 can be adjusted through the angle between the hinge block 482 and the connecting block 481.

[0109] The adjusting portion 484 includes a first screw 4841 , a second screw 4842 , and a rotating block 4843 . The first screw 4841 and the second screw 4842 have opposite rotation directions.

[0110] The first end of the first screw rod 4841 is disposed in the adjusting sleeve 483 and is threadedly connected to the adjusting sleeve 483. The first end of the second screw rod 4842 is coaxially fixedly connected to the second end of the first screw rod 4841 through the rotating block 4843. The fixing block 411 is provided with a threaded hole adapted to the second screw rod 4842.

[0111] The first screw rod 4841 is threadedly inserted into the adjusting sleeve 483 , the second screw rod 4842 is threadedly inserted into the connecting support 410 , and a positioning block 485 is fixedly sleeved on the top of the second screw rod 4842 . The positioning block 485 can block the connecting support 410 to reduce the possibility of the connecting support 410 falling off the second screw rod 4842 .

[0112] The first screw 4841 and the second screw 4842 are driven to rotate by the rotating block 4843. Through the principle of thread transmission, the first screw 4841 is pushed out or retracted into the adjusting sleeve 483. At the same time, the second screw 4842 drives the connecting support 410 to approach or move away from the rotating block 4843, thereby adjusting the distance between the connecting support 410 and the adjusting sleeve 483. By adjusting the length of the connecting support 410 from the adjusting sleeve 483, the connecting support 410 is driven to move relative to the inner side of the tunnel support structure 200, so that the sliding rod 412 on the connecting support 410 is parallel to the inner side of the tunnel support structure 200, so that when the pressure sensor 326 on the second deformation monitor 430 monitors the specific deformation of the tunnel axis, the initial pressure of the pressure sensor 326 is consistent during the movement.

[0113] By adjusting the second deformation monitor 430, the initial pressure of the pressure sensor 326 on the second deformation monitor 430 is made consistent with the initial pressure of the pressure sensor 326 on the first deformation monitor 320. In the entire deformation monitoring equipment, the initial pressure is unified, which is convenient for operators to record. To monitor the specific deformation of the tunnel axis, they only need to compare the monitoring value with the unified pressure value, reducing the need to compare the initial pressures at different positions when the pressure of the pressure sensor 326 reflects the deformation at different locations, and then compare and judge the pressure difference at different positions, and then judge the specific deformation of the tunnel axis, which is convenient for operators to make intuitive judgments. At the same time, when the pressure sensors 326 at different positions are monitored, the range used by the pressure sensors 326 is consistent.

[0114] Embodiment 5

[0115] This embodiment provides a complete working principle based on embodiments one to four.

[0116] After the fixed monitoring component 300 is installed, when it is necessary to adjust the initial pressure value of the pressure sensor 326, rotate the connecting bolt 324 to make the connecting bolt 324 withdraw or extend into the connecting sleeve 328, and the connecting bolt 324 drives the mounting plate 325 and the pressure sensor 326 to move, thereby adjusting the length of the compression spring 323, changing the elastic force of the compression spring 323, and at the same time, changing the clamping force of the compression spring 323 on the pressure sensor 326, and adjusting the elastic force of the compression spring 323 on different first deformation monitors 320 to be consistent, so that the pressure of the compression spring 323 on the pressure sensor 326 is consistent, and then the initial values ​​on different pressure sensors 326 are consistent, reducing the situation where the operator needs to record the initial numbers on the pressure sensors 326 at different positions, and only needs to record the unified value after adjustment. At the same time, when the pressure sensors 326 at different positions are monitored, the range used by the pressure sensors 326 is consistent.

[0117] When the pressure sensor 326 on the first deformation monitor 320 detects deformation, the active monitoring component 400 of the area corresponding to the pressure sensor 326 is started. The starting process of the active monitoring component 400 is: turn on the drive motor 460, and the drive motor 460 drives the transmission screw 470 to rotate. Through the principle of thread transmission, the transmission screw 470 drives the movable support 420 to slide along the slide rod 412. At the same time, the movable support 420 drives the second deformation monitor 430 to move, and the second deformation monitor 430 slides along the inner surface of the tunnel support structure 200. The pressure sensor 326 on the second deformation monitor 430 monitors the deformation area of ​​the tunnel axis. Different deformation parameters are reflected by the pressure monitored by the pressure sensor 326, and then the specific deformation of the tunnel axis can be judged.

[0118] The first screw 4841 and the second screw 4842 are driven to rotate by the rotating block 4843. Through the principle of thread transmission, the first screw 4841 is pushed out or retracted into the adjusting sleeve 483. At the same time, the second screw 4842 drives the connecting support 410 to approach or move away from the rotating block 4843, thereby adjusting the distance between the end of the connecting support 410 and the adjusting sleeve 483. By adjusting the length of the distance between the two ends of the connecting support 410 and the adjusting sleeve 483, the connecting support 410 is driven to move relative to the inner side of the tunnel support structure 200, so that the sliding rod 412 on the connecting support 410 is parallel to the inner side of the tunnel support structure 200, so that when the pressure sensor 326 on the second deformation monitor 430 monitors the specific deformation of the tunnel axial direction, the initial pressure of the pressure sensor 326 is The force is consistent during the movement. By adjusting the second deformation monitor 430, the initial pressure of the pressure sensor 326 on the second deformation monitor 430 is consistent with the initial pressure of the pressure sensor 326 on the first deformation monitor 320. In the entire deformation monitoring equipment, the initial pressure is unified, which is convenient for operators to record and monitor the specific deformation of the tunnel axis. It is only necessary to compare the monitoring value with the unified pressure value, reducing the need to compare the initial pressures at different positions when the pressure response of the pressure sensor 326 is used to measure the deformation at different locations, and then compare and judge the pressure difference at different positions, and then judge the specific deformation of the tunnel axis, which is convenient for the operator's intuitive judgment. At the same time, when the pressure sensors 326 at different positions are monitored, the range used by the pressure sensors 326 is consistent.

[0119] It should be noted that the specific model specifications of the pressure sensor 326 and the drive motor 460 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0120] The power supply and principle of the pressure sensor 326 and the driving motor 460 are clear to those skilled in the art and will not be described in detail here.

[0121] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A deformation monitoring device for a tunnel support structure, characterized in that: comprising a fixed monitoring assembly (300); The fixed monitoring component (300) comprises: At least one arc-shaped mounting frame (310) is arranged in the tunnel supporting structure (200) along the circumference of the tunnel supporting structure (200), and the bottom end of each arc-shaped mounting frame (310) is fixedly connected to the bottom end of the tunnel supporting structure (200); at least one first deformation monitor (320), which is fixedly mounted on the arc-shaped mounting frame (310), and a monitoring end of the first deformation monitor (320) is in contact with an inner side surface of the tunnel support structure (200); Wherein, the first deformation monitor comprises: A mounting sleeve (321) connected to the arc-shaped mounting frame (310), wherein the central axis of the mounting sleeve (321) is arranged along the radial direction of the tunnel; A detection rod (322), a first end of which is arranged in the installation sleeve (321), and a second end of the detection rod (322) is pressed against the inner side surface of the tunnel support structure (200); A mounting plate (325) connected to the arc-shaped mounting frame (310) via connecting bolts (324); A pressure sensor (326) fixedly connected to the mounting plate (325); A compression spring (323) is arranged in the mounting sleeve (321), and a first end of the compression spring (323) is connected to a first end of the detection rod (322), and a second end of the compression spring (323) is connected to a detection end of the pressure sensor (326); The deformation monitoring device also includes: An activity monitoring assembly (400) is arranged between two adjacent arc-shaped mounting frames (310), and the activity monitoring assembly comprises: A connecting support (410) connected to the arc-shaped mounting frame (310); A movable support (420) is slidably connected to the connecting support (410), and the movable support (420) slides relative to the connecting support (410) along the central axis of the tunnel (100); A driving assembly, used for driving the movable support (420) to slide on the connecting support (410); A second deformation monitor (430) is fixedly arranged on the movable support (420), and a monitoring end of the second deformation monitor (430) contacts the inner side surface of the tunnel support structure (200). The structure of the second deformation monitor (430) is the same as that of the first deformation monitor (320). The mounting sleeve (321) of the second deformation monitor (430) is fixedly connected to the movable support (420).

2. A deformation monitoring device for a tunnel support structure according to claim 1, characterized in that: The detection rod (322) comprises: A first sliding block (3222) is disposed in the mounting sleeve (321) and is slidable along the central axis of the mounting sleeve (321); A rod body (3221) has a first end fixedly connected to the first sliding block (3222), and a second end of the rod body (3221) is pressed tightly against the inner side surface of the tunnel support structure (200).

3. A deformation monitoring device for a tunnel support structure according to claim 2, characterized in that: The first deformation monitor (320) further comprises: a second slider (327) disposed between the compression spring (323) and the pressure sensor (326), wherein the compression spring (323) applies elastic forces in opposite directions to the first slider (3222) and the second slider (327), and the second slider (327) is disposed in the mounting sleeve (321) and can slide along the central axis of the mounting sleeve (321); A connecting sleeve (328) is connected to the arc-shaped mounting frame (310) and is adapted to the connecting bolt (324), wherein the length of the connecting bolt (324) is greater than the depth of the connecting sleeve (328).

4. A deformation monitoring device for a tunnel support structure according to any one of claims 1 to 3, characterized in that: If there are multiple arc-shaped mounting frames (310), two adjacent arc-shaped mounting frames (310) are fixedly connected via a reinforcing rod (330), and the bottom ends of the two adjacent arc-shaped mounting frames (310) are fixedly connected with a support plate (340), and the support plate (340) is fixedly connected to the bottom end of the tunnel support structure (200); If there are plural first deformation monitors (320), the distance between two adjacent first deformation monitors (320) is equal.

5. The deformation monitoring device for a tunnel support structure according to claim 1, characterized in that: The connecting support (410) comprises: Adjustment member (480); two fixing blocks (411) connected to the arc-shaped mounting frame (310) via the adjusting member (480); A sliding rod (412) is arranged along the central axis of the tunnel (100), and two ends of the sliding rod (412) are respectively fixedly connected to the two fixed blocks (411), and a sliding hole for the sliding rod (412) to pass through is arranged on the movable support (420).

6. A deformation monitoring device for a tunnel support structure according to claim 5, characterized in that: The adjusting member (480) comprises: A connecting block (481) fixedly connected to the arc-shaped mounting frame (310); A hinge block (482) hinged to the connecting block (481); An adjusting sleeve (483) fixedly connected to the hinge block (482); A regulating unit (484), comprising: A first screw rod (4841), a first end of which is disposed in the adjusting sleeve (483) and is threadedly connected to the adjusting sleeve (483); A second screw rod (4842), a first end of which is coaxially fixedly connected to the second end of the first screw rod (4841) via a rotating block (4843), and a threaded hole adapted to the second screw rod (4842) is provided on the fixing block (411); Wherein, the first screw (4841) and the second screw (4842) have opposite rotation directions.

7. The deformation monitoring device for a tunnel support structure according to claim 6, characterized in that: The drive assembly comprises: A rotating support (440) fixedly connected to one of the fixed blocks (411); A mounting support (450) fixedly connected to another of the fixing blocks (411); A driving motor (460) fixedly connected to the mounting support (450); A transmission screw (470) is arranged in parallel with the sliding rod (412), and the first end of the transmission screw (470) is rotatably connected to the rotating support (440), and the movable support (420) is provided with a screw hole adapted to the transmission screw (470), and the second end of the transmission screw (470) passes through the screw hole to be dynamically connected to the torque output shaft of the driving motor (460).

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