A device for measuring deformation and displacement of tunnel surrounding rock

Abstract

The present invention discloses a device for measuring deformation displacement of tunnel surrounding rock, which specifically relates to the field of urban underground space construction. The device comprises a main displacement meter and a branch displacement meter. The branch displacement meter is installed on the side of the main displacement meter. The main displacement meter is fixedly connected to an outer ring. The inner ring of the outer ring is rotatably connected to an inner ring through a limit assembly. The branch displacement meter is installed on the inner ring. The branch displacement meter comprises a connecting rod and an anchor assembly. Even when the surrounding rock and the branch displacement meter in a certain fault move together, the inclined branch displacement meter is not located in the same plane as the horizontal and vertical branch displacement meters, but is inserted into other surrounding rock layers. Therefore, it can receive pressure in multiple directions. Therefore, when some horizontal and vertical branch displacement meters cannot obtain data, the inclined branch displacement meter can still obtain the movement data of the surrounding rock, thereby improving the accuracy of measuring the surrounding rock movement.

Description

Technical Field

[0001] The present invention relates to the field of urban underground space construction, and more particularly to a device for measuring deformation and displacement of tunnel surrounding rock. Background Art

[0002] When the commonly used multi-point displacement meter is used to test the deformation of the tunnel surrounding rock, when the multi-point displacement meter device and the surrounding rock move as a whole, that is, the displacement meter test rod itself does not deform, the test value of the multi-point displacement meter is 0 at this time, which cannot truly reflect the surrounding rock deformation data.

[0003] At present, the layout of multi-point displacement meters is mostly a main displacement meter plus two or three horizontal and vertical branch displacement meters. The main displacement meter and the branch displacement meter are mostly located in the same plane. Therefore, it is easier for the above-mentioned displacement meter to move together with the surrounding rock. Therefore, there is a need for a multi-point displacement meter that can reduce the displacement occurring simultaneously with the surrounding rock. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for measuring the deformation displacement of tunnel surrounding rock. The technical problem to be solved by the present invention is that the layout of multi-point displacement meters is mostly a main displacement meter plus two or three horizontal and vertical branch displacement meters. The main displacement meter and the branch displacement meter are mostly located in the same plane, so it is easier for the above-mentioned displacement meter to move together with the surrounding rock.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for measuring deformation displacement of tunnel surrounding rock, comprising a main displacement meter and a branch displacement meter, wherein the branch displacement meter is installed on the side of the main displacement meter, the main displacement meter is fixedly connected to an outer ring, the outer ring is rotatably connected to an inner ring through a limit assembly, the inner ring is installed with a branch displacement meter, the branch displacement meter comprises a connecting rod and an anchor assembly, one end of the connecting rod is fixedly connected to the inner ring and the other end is installed with an anchor assembly.

[0006] Preferably, the limiting assembly includes a resistance wire and hot melt adhesive, a cavity is opened in the outer ring, the cavity is filled with hot melt adhesive, one end of the resistance wire extends into the hot melt adhesive and the other end is located outside the outer ring.

[0007] Preferably, the anchoring assembly includes an extension unit, a positioning rod, an anchor head, a wedge-shaped anchor and a wedge block. The connecting rod is connected to the positioning rod through the extension unit. The positioning rod is fixedly connected to a wedge block on one end away from the main road displacement meter. The outer side of the positioning rod is slidably connected to the anchor head. A plurality of wedge-shaped anchors are slidably penetrated in the anchor head, and the wedge-shaped anchors are located on the moving path of the wedge block.

[0008] Preferably, the extension unit includes a sliding rod, a connecting rod 2, a pin shaft and a pin hole. The connecting rod 1 is slidably connected to the sliding rod and the connecting rod 2. A plurality of pin holes are provided on the connecting rod 2. The pin shaft and the pin holes are engaged with each other to limit the movement of the sliding rod and the connecting rod 2.

[0009] Preferably, a reel is elastically rotatably connected in the sliding rod, a sensor base is fixedly connected to the connecting rod one, the sensor base is electrically connected to the sensor located in the connecting rod two through a cable, and the cable is wound around the reel.

[0010] The technical effects and advantages of the present invention are as follows: when in use, the main displacement meter and the branch displacement meter are driven into the surrounding rock, and the main displacement meter and the branch displacement meter use the surrounding rock displacement data received by their internal sensors and upload the displacement data to the data terminal, which is convenient for users to monitor in real time. The inner ring connected to the outer ring is rotated and fixed by the limit assembly, so that the branch displacement meter can be driven into the surrounding rock from an inclined direction. In the later force analysis process, the inclined branch displacement meter, which is different from the horizontally and vertically arranged branch displacement meter, is subjected to horizontal and vertical pressure from the movement of the surrounding rock. Even when the surrounding rock and the branch displacement meter in a certain fault move together, the inclined branch displacement meter is not located in the same plane as the horizontally and vertical branch displacement meter, but is inserted into other surrounding rock layers. Therefore, it can receive pressure in multiple directions. Therefore, when some horizontally and vertical branch displacement meters cannot obtain data, the inclined branch displacement meter can still obtain the movement data of the surrounding rock, thereby improving the accuracy of measuring the surrounding rock movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic structural diagram of a device for measuring deformation and displacement of surrounding rock in a tunnel according to the present invention.

[0012] Figure 2 It is a structural schematic diagram of the winding wheel of the present invention.

[0013] Figure 3 Schematic diagram of the structure of the wedge anchor of the present invention.

[0014] Figure 4 Schematic diagram of the structure of the resistance wire of the present invention.

[0015] The accompanying drawings are:

[0016] 1. Main displacement meter; 2. Connecting rod 1; 3. Sliding rod; 4. Connecting rod 2; 5. Positioning rod; 6. Anchor head; 7. Inner ring; 8. Outer ring; 9. Resistance wire; 10. Hot melt adhesive; 11. Pin shaft; 12. Winding wheel; 13. Pin hole; 14. Wedge anchor; 15. Wedge block. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1

[0019] See also Figure 1 and Figure 4 A device for measuring deformation displacement of tunnel surrounding rock, including a main displacement meter 1 and a branch displacement meter. The branch displacement meter is installed on the side of the main displacement meter 1. The main displacement meter 1 is fixedly connected to an outer ring 8. The outer ring 8 is rotatably connected to an inner ring 7 through a limit assembly. The branch displacement meter is installed on the inner ring 7. The branch displacement meter includes a connecting rod 2 and an anchor assembly. One end of the connecting rod 2 is fixedly connected to the inner ring 7 and the other end is installed with an anchor assembly. During use, the main displacement meter 1 and the branch displacement meter are driven into the surrounding rock, and the main displacement meter 1 and the branch displacement meter use the surrounding rock displacement data received by their internal sensors and upload the displacement data to the data terminal for real-time monitoring by the user. The inner ring 7 connected to the outer ring 8 is rotated and fixed by the limit assembly, so that the branch displacement meter can be driven into the surrounding rock from an inclined direction. In the later stress analysis process, the inclined branch displacement meter, which is different from the horizontally and vertically arranged branch displacement meter, is subjected to horizontal and vertical pressure from the movement of the surrounding rock. Even when the surrounding rock and the branch displacement meter in a certain fault move together, the inclined branch displacement meter is not located in the same plane as the horizontally and vertical branch displacement meter, but is inserted into other surrounding rock layers. Therefore, it can receive pressure in multiple directions. Therefore, when some horizontally and vertical branch displacement meters cannot obtain data, the inclined branch displacement meter can still obtain the movement data of the surrounding rock, thereby improving the accuracy of measuring the movement of the surrounding rock.

[0020] The limit assembly includes a resistance wire 9 and hot melt adhesive 10. A cavity is defined within the outer ring 8, which is filled with hot melt adhesive 10. One end of the resistance wire 9 extends into the hot melt adhesive 10, and the other end is located outside the outer ring 8. When the tilted branch displacement meter needs to be rotated, power is applied to the resistance wire 9, causing it to heat up and melt the hot melt adhesive 10. When the tilted branch displacement meter moves to the appropriate angle, power is removed, allowing the hot melt adhesive 10 to gradually cool and solidify, thereby consolidating the inner ring 7 and the outer ring 8, stabilizing the positional relationship between the inner ring 7 and the outer ring 8, and thus achieving the purpose of stabilizing the tilted branch displacement meter.

[0021] Example 2

[0022] See also Figure 1 、 Figure 2 and Figure 3 Based on the above embodiment, the anchor assembly includes an extension unit, a positioning rod 5, an anchor head 6, a wedge anchor 14, and a wedge block 15. The connecting rod 2 is connected to the positioning rod 5 through the extension unit. The positioning rod 5 is fixedly connected to the end away from the main displacement meter 1 with the wedge block 15. The anchor head 6 is slidably connected to the outer side of the positioning rod 5. A plurality of wedge anchors 14 are slidably penetrated through the anchor head 6, and the wedge anchors 14 are located on the movement path of the wedge block 15. The positioning rod 5 is inserted into the fixing hole drilled in the surrounding rock. If the surrounding rock gradually loosens during the gradual movement, causing relative displacement between the anchor head 6 and the fixing hole, the positioning rod 5 will lift the wedge anchor 14 when relative displacement occurs with the anchor head 6. The plurality of wedge anchors 14 apply pressure to the surrounding rock, thereby reducing the negative impact of the loose surrounding rock on the measurement of the branch displacement meter. At this time, the data measured by the displacement meter will have an error, which reminds the user that the surrounding rock is in a loose state.

[0023] The extension unit includes a slide bar 3, a second link 4, a pin 11, and a pin hole 13. The first link 2 is slidably connected to the second link 4 via the slide bar 3. The second link 4 is provided with a plurality of pin holes 13. The pins 11 and the pin holes 13 engage to restrict the movement of the slide bar 3 and the second link 4. To enable the branch displacement meter to penetrate into different rock formations and detect displacement at different depths of the surrounding rock, by pulling the first link 2 and the second link 4 and causing them to slide relative to each other, the positioning rod 5 and the anchor head 6 can penetrate to different depths of the surrounding rock, thereby receiving movement data at different depths of the surrounding rock. This also reduces the probability of simultaneous movement of the branch displacement meter and the rock formation when the branch displacement meter is detecting different rock formations. The engagement of the pins 11 and the pin holes 13 secures the slide bar 3 and the second link 4, further restricting the distance between the first link 2 and the second link 4 on the basis of the fixed connection between the first link 2 and the slide bar 3.

[0024] A reel 12 is elastically and rotatably connected to the slide bar 3. A sensor base is fixedly connected to the connecting rod 1 2. The sensor base is electrically connected to a sensor located in the connecting rod 2 4 via a cable, and the cable is wound around the reel 12. The cable wound around the reel 12 can always be kept in a relatively tight state under the action of the elastic force of the reel 12 when the connecting rods 1 2 and 2 4 move relative to each other. Therefore, the reel 12 here can bundle the cable and prevent the cable sheath from cracking due to excessive bending of the cable inside the slide bar 3.

[0025] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," "right," etc. are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0026] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0027] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for measuring deformation and displacement of tunnel surrounding rock, comprising a main displacement meter (1) and a branch displacement meter, wherein the branch displacement meter is installed on the side of the main displacement meter (1), and characterized in that: The main displacement meter (1) is fixedly connected to an outer ring (8), the inner ring (7) is rotatably connected to the outer ring (8) through a limit assembly, and the branch displacement meter is installed on the inner ring (7). The branch displacement meter includes a connecting rod (2) and an anchor assembly, one end of the connecting rod (2) is fixedly connected to the inner ring (7) and the other end is installed with the anchor assembly; the anchor assembly includes an extension unit, a positioning rod (5), an anchor head (6), a wedge anchor (14) and a wedge block (15), the connecting rod (2) is fixedly connected to the inner ring (7) through the extension unit The invention relates to a positioning rod (5), wherein a wedge block (15) is fixedly connected to one end of the positioning rod (5) away from the main displacement meter (1), and an anchor head (6) is slidably connected to the outer side of the positioning rod (5); the extension unit comprises a sliding rod (3), a second connecting rod (4), a pin shaft (11) and a pin hole (13); the first connecting rod (2) is slidably connected to the second connecting rod (4) through the sliding rod (3); a sensor base is fixedly connected to the first connecting rod (2), and the sensor base is electrically connected to the sensor located in the second connecting rod (4) through a cable.

2. The device for measuring deformation and displacement of tunnel surrounding rock according to claim 1, characterized in that: The limiting assembly includes a resistance wire (9) and a hot melt adhesive (10), a cavity is provided in the outer ring (8), the cavity is filled with the hot melt adhesive (10), one end of the resistance wire (9) extends into the hot melt adhesive (10) and the other end is located outside the outer ring (8).

3. The device for measuring deformation and displacement of tunnel surrounding rock according to claim 1 or 2, characterized in that: A plurality of wedge-shaped anchor nails (14) are slidably provided in the anchor head (6), and the wedge-shaped anchor nails (14) are located on the moving path of the wedge-shaped block (15).

4. The device for measuring deformation and displacement of tunnel surrounding rock according to claim 3, characterized in that: The second connecting rod (4) is provided with a plurality of pin holes (13), and the pin shaft (11) and the pin holes (13) are engaged with each other to limit the movement of the sliding rod (3) and the second connecting rod (4).

5. The device for measuring deformation and displacement of tunnel surrounding rock according to claim 4, characterized in that: A reel (12) is elastically rotatably connected inside the slide bar (3), and the cable is wound around the reel (12).

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