Convergence gauge fixing structure for tunnel deformation monitoring

Abstract

The utility model relates to the technical field of tunnel engineering monitoring, in particular to a convergence gauge fixing structure for tunnel deformation monitoring, which comprises a convergence gauge body, one end of a ruler frame of the convergence gauge body is provided with a hook, the hook comprises a connecting arm and an arc-shaped arm, and the connecting arm is fixedly connected with the ruler frame; a movable clamping piece is arranged on the hook, and the movable clamping piece is arranged on the connecting arm in a sliding manner; a closed hooking cavity is formed among the movable clamping piece, the connecting arm and the arc-shaped arm, and when the movable clamping piece moves along the connecting arm, the area of the hooking cavity is increased or decreased; the end, away from the connecting arm, of the movable clamping piece abuts against the arc-shaped arm, and the end, away from the connecting arm, of the movable clamping piece is movably arranged and used for opening or closing the hooking cavity. According to the utility model, on the premise that the embedded part-hanging ring is not damaged, the hook structure is improved to ensure that the embedded part and the hanging ring do not displace when being fixed, so that the displacement error caused by the traditional arc-shaped hook is overcome, and the measurement accuracy is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering monitoring, in particular to a convergence meter fixing structure used for tunnel deformation monitoring. Background Art

[0002] During tunnel construction, in order to ensure construction safety and structural stability, it is necessary to monitor the deformation of the tunnel chamber to prevent tunnel collapse. Tunnel perimeter convergence is a must-measure item in monitoring and measurement, and convergence meters are widely used in tunnel perimeter convergence monitoring due to their small size, high accuracy and easy operation.

[0003] The existing convergence meter is provided with locating pins at both ends. When in use, the hooks at both ends are connected to the locating pins, and the steel tape measure inside the convergence meter is tensioned and hung on the hanging ring pre-buried in the tunnel wall. Then, when the steel tape measure is retracted until it cannot be retracted anymore, the length value of the steel tape and the length value of the micrometer in the convergence meter are read to obtain the length values ​​of the two measuring points. The measurement accuracy is generally 0.01mm.

[0004] At present, when measuring tunnel convergence, the hooks at both ends of the convergence meter are generally hanging rings or arc hooks. Each time the convergence is monitored, the contact position of the arc hook is different and the convergence meter is a high-precision measuring tool, which will lead to errors in the test results. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a convergence meter fixing structure for tunnel deformation monitoring. Under the premise of not damaging the embedded part-hanging ring, the hook structure is improved to ensure that the two are not displaced when fixed, thereby overcoming the displacement error caused by the traditional arc hook and effectively ensuring the measurement accuracy.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A fixed structure of an extensometer for tunnel deformation monitoring, comprising an extensometer body, one end of a ruler frame of the extensometer body is provided with a hook, the hook comprises a connecting arm and an arc-shaped arm, the connecting arm is fixedly connected to the ruler frame;

[0008] The hook is provided with an active clamping piece, the active clamping piece is slidably arranged on the connecting arm, and the active clamping piece can be fixed at any position of the connecting arm;

[0009] A closed hook cavity is formed between the movable clamp, the connecting arm and the arc-shaped arm, and when the movable clamp moves along the connecting arm, the area of ​​the hook cavity increases or decreases;

[0010] One end of the movable clamp away from the connecting arm abuts against the arc-shaped arm, and one end of the movable clamp away from the connecting arm is movably arranged to open or close the hook cavity.

[0011] Further, the movable clamp comprises a connecting sleeve, a connecting plate and a locking plate, the connecting sleeve is slidably sleeved on the outside of the connecting arm, one end of the connecting plate is fixedly connected to the connecting sleeve, and the other end of the connecting plate is provided with an arc-shaped sliding groove;

[0012] The locking plate is an L-shaped structure, the first end of the locking plate is hinged to the connecting sleeve, the first end of the locking plate is also slidably matched with the sliding groove through a sliding shaft, and the second end of the locking plate is freely abutted against the inner side surface of the arc-shaped arm;

[0013] The connecting sleeve is locked at any position of the connecting arm through a locking piece.

[0014] Furthermore, the connecting plate is fixed to the connecting sleeve by screws, and the locking plate is hinged to the connecting sleeve by a pin.

[0015] Furthermore, the locking member includes a locking bolt.

[0016] Furthermore, the connecting arm is provided with a through slot along its length direction, and the tail of the locking bolt passes through one side of the connecting sleeve and the through slot to the other side of the connecting sleeve to cooperate with the nut, and a gasket is provided on the outside of the locking bolt, and the gasket is located between the connecting arm and the connecting sleeve.

[0017] Furthermore, the connecting sleeve is provided with a threaded hole adapted to the locking bolt, and the tail of the locking bolt enters the threaded hole and is pressed against the surface of the connecting arm.

[0018] Furthermore, a torsion spring is sleeved on the outside of the pin shaft. Two ends of the torsion spring are respectively fixedly connected to the outer wall of the pin shaft and the locking plate. The torsion spring is used to reset the locking plate.

[0019] The beneficial effects of the utility model are:

[0020] The utility model ensures that the embedded part-hanging ring does not move when the two are fixed by improving the hook structure without damaging the embedded part-hanging ring, thereby overcoming the displacement error caused by the traditional arc hook and effectively ensuring the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the convergence meter fixing structure used for tunnel deformation monitoring in an embodiment of the utility model;

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of the local A in the middle;

[0023] Figure 3 It is a cross-sectional view of the fixing structure of the convergence meter used for tunnel deformation monitoring;

[0024] Figure 4 A perspective view of the fixing structure of the convergence meter used for tunnel deformation monitoring;

[0025] In the figure, 1. convergence meter body; 2. connecting arm; 3. arc arm; 4. connecting sleeve; 5. connecting plate; 6. locking plate; 7. locking piece; 8. screw; 9. pin shaft; 10. sliding shaft; 11. through groove; 12. sliding groove. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0028] Embodiment 1:

[0029] like Figure 1-Figure 4 As shown, a fixed structure of an extensometer for tunnel deformation monitoring includes an extensometer body 1, one end of a ruler frame of the extensometer body 1 is provided with a hook, the hook includes a connecting arm 2 and an arc-shaped arm 3, and the connecting arm 2 is fixedly connected to the ruler frame;

[0030] The hook is provided with an active clamp, which is slidably arranged on the connecting arm 2, and the active clamp can be fixed at any position of the connecting arm 2;

[0031] A closed hook cavity is formed between the movable clamp, the connecting arm 2 and the arc-shaped arm 3. When the movable clamp moves along the connecting arm 2, the area of ​​the hook cavity increases or decreases.

[0032] The end of the movable clamp away from the connecting arm 2 abuts against the arc-shaped arm 3, and the end of the movable clamp away from the connecting arm 2 is movably arranged to open or close the hook cavity.

[0033] like Figure 2-Figure 4 As shown, the movable clamp comprises a connecting sleeve 4, a connecting plate 5 and a locking plate 6, the connecting sleeve 4 is slidably sleeved on the outside of the connecting arm 2, one end of the connecting plate 5 is fixedly connected to the connecting sleeve 4, and the other end of the connecting plate 5 is provided with an arc-shaped sliding groove 12;

[0034] The locking plate 6 is an L-shaped structure, the first end of the locking plate 6 is hinged to the connecting sleeve 4, the first end of the locking plate 6 is also slidably matched with the sliding groove 12 through the sliding shaft 10, and the second end of the locking plate 6 is freely abutted against the inner side surface of the arc-shaped arm 3;

[0035] The connecting sleeve 4 is locked at any position of the connecting arm 2 by means of a locking piece 7 .

[0036] like Figure 2 and Figure 3 As shown, the connecting plate 5 is fixed to the connecting sleeve 4 by screws 8, and the locking plate 6 is hinged to the connecting sleeve 4 by a pin 9. A torsion spring is sleeved outside the pin 9. The two ends of the torsion spring are respectively fixedly connected to the outer wall of the pin 9 and the locking plate 6. The torsion spring is used to reset the locking plate 6.

[0037] Working away from: When the hook is hung on the hanging ring embedded in the tunnel wall, the outside of the hanging ring squeezes the locking plate 6, the connecting end of the locking plate 6 rotates, and the free end of the locking plate 6 moves toward the end close to the connecting arm 2, thereby opening the closed hook cavity, so that the hanging ring can smoothly enter the hook (hook cavity).

[0038] When the hanging ring enters the hook cavity, release the locking piece 7 to allow the connecting sleeve 4 to slide along the connecting arm 2. Then let the connecting sleeve 4 slide toward the arc-shaped arm 3 to reduce the (cross-sectional) area of ​​the hook cavity. In this process, the inner side of the locking plate 6 gradually approaches the hanging ring until the locking plate 6 is close to the outer wall of the hook, and then the sliding stops and the connecting sleeve 4 and the connecting arm 2 are fixed by the locking piece 7. At this time, the hanging ring is firmly clamped in the hook cavity by the locking plate 6, and there will be no relative displacement between the hanging ring and the hook, ensuring the measurement accuracy.

[0039] The utility model ensures that the embedded part-hanging ring does not move when the two are fixed by improving the hook structure without damaging the embedded part-hanging ring, thereby overcoming the displacement error caused by the traditional arc hook and effectively ensuring the measurement accuracy.

[0040] The locking member 7 comprises a locking bolt.

[0041] The connecting arm 2 is provided with a through slot 11 along its length direction, and the tail of the locking bolt passes through one side of the connecting sleeve 4 and the through slot 11 to the other side of the connecting sleeve 4 to cooperate with the nut. A gasket is provided on the outside of the locking bolt and is located between the connecting arm 2 and the connecting sleeve 4.

[0042] The working principle of the locking member 7 is as follows: when the bolt or nut is tightened, the bolt or nut squeezes the connecting sleeve 4 , thereby increasing the friction between the gasket, the connecting sleeve 4 and the connecting arm 2 , thereby locking the connecting sleeve 4 on the connecting arm 2 .

[0043] Embodiment 2:

[0044] The difference between this embodiment and embodiment 1 is that a threaded hole adapted to the locking bolt is provided on the connecting sleeve 4 , and the tail of the locking bolt enters the threaded hole and is pressed against the surface of the connecting arm 2 .

[0045] When the locking bolt is tightened, the head of the locking bolt presses against the connecting arm 2. As the pressure increases, the friction between the connecting arm 2 and the connecting sleeve 4 is increased, thereby achieving locking of the two.

[0046] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A fixed structure of a convergence meter for tunnel deformation monitoring, comprising a convergence meter body, one end of a ruler frame of the convergence meter body is provided with a hook, the hook comprises a connecting arm and an arc arm, the connecting arm is fixedly connected to the ruler frame; characterized in that: The hook is provided with an active clamping piece, the active clamping piece is slidably arranged on the connecting arm, and the active clamping piece can be fixed at any position of the connecting arm; A closed hook cavity is formed between the movable clamp, the connecting arm and the arc-shaped arm, and when the movable clamp moves along the connecting arm, the area of ​​the hook cavity increases or decreases; One end of the movable clamp away from the connecting arm abuts against the arc-shaped arm, and one end of the movable clamp away from the connecting arm is movably arranged to open or close the hook cavity.

2. The convergence meter fixing structure for tunnel deformation monitoring according to claim 1 is characterized in that: The movable clamp comprises a connecting sleeve, a connecting plate and a locking plate, wherein the connecting sleeve is slidably mounted on the outside of the connecting arm, one end of the connecting plate is fixedly connected to the connecting sleeve, and the other end of the connecting plate is provided with an arc-shaped sliding groove; The locking plate is an L-shaped structure, the first end of the locking plate is hinged to the connecting sleeve, the first end of the locking plate is also slidably matched with the sliding groove through a sliding shaft, and the second end of the locking plate is freely abutted against the inner side surface of the arc-shaped arm; The connecting sleeve is locked at any position of the connecting arm through a locking piece.

3. The convergence meter fixing structure for tunnel deformation monitoring according to claim 2 is characterized in that: The connecting plate is fixed to the connecting sleeve by screws, and the locking plate is hinged to the connecting sleeve by a pin.

4. The convergence meter fixing structure for tunnel deformation monitoring according to claim 2 is characterized in that: The locking member comprises a locking bolt.

5. The convergence meter fixing structure for tunnel deformation monitoring according to claim 4 is characterized in that: The connecting arm is provided with a through slot along its length direction, and the tail of the locking bolt passes through one side of the connecting sleeve and the through slot to the other side of the connecting sleeve to cooperate with the nut, and a gasket is provided on the outside of the locking bolt, and the gasket is located between the connecting arm and the connecting sleeve.

6. The convergence meter fixing structure for tunnel deformation monitoring according to claim 4 is characterized in that: The connecting sleeve is provided with a threaded hole adapted to the locking bolt, and the tail of the locking bolt enters the threaded hole and is pressed against the surface of the connecting arm.

7. The convergence meter fixing structure for tunnel deformation monitoring according to claim 3 is characterized in that: A torsion spring is sleeved outside the pin shaft.

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