A monitoring device for earth pressure of surrounding rock of a highway tunnel

Abstract

The utility model relates to tunnel monitoring equipment technical field provides a kind of highway tunnel surrounding rock soil pressure monitoring device, including tray, soil pressure box is arranged on tray, sleeve pipe is fixedly connected in tray lower end surface, screw rod is screwed in sleeve pipe, one end of screw rod is fixedly connected with rotating member, rotating member is rotatably connected with base through bearing seat, fixed mechanism is arranged between sleeve pipe and base;Fixed mechanism includes fixed disc fixedly connected on sleeve pipe and arc plate fixedly connected on base, arc-shaped sliding slot is set up on fixed disc, arc plate is inserted and slides in sliding slot, fixed piece is arranged between arc plate and fixed disc, the utility model can avoid the change of the overall length of device, to ensure monitoring accuracy.

Description

Technical Field

[0001] This utility model relates to the field of tunnel monitoring equipment technology, and more specifically, to a monitoring device for soil pressure in the surrounding rock of a highway tunnel. Background Technology

[0002] To ensure construction safety during highway tunnel construction, earth pressure monitoring has become a crucial method for tunnel monitoring during the construction period. Steel wire earth pressure cells are among the most commonly used earth pressure monitoring devices. When burying earth pressure cells in a tunnel, it is generally necessary to ensure that one side of the earth pressure cell is in close contact with the surrounding rock. Typically, the surface of the earth pressure cell is perpendicular to the direction of the surrounding rock pressure to achieve the best monitoring results.

[0003] Patent document CN221743583U discloses an earth pressure box embedding device, including an adjustable-length push rod. The top of the push rod has a fixing structure for securing the earth pressure box, and the bottom of the push rod has a base for fixed connection to a support. This utility model's earth pressure box embedding device uses a push rod to adjust the distance between the earth pressure box and the support, thus inserting the earth pressure box into the earth pressure box mounting hole and obtaining the set initial pressure. It facilitates subsequent pouring and fixing; the structure is simple, and it is particularly suitable for tunnel construction.

[0004] However, existing devices are inevitably affected by construction vibrations during use, causing the lead screw to rotate and altering the overall length of the device, such as shortening it. This prevents the earth pressure cell from fitting tightly against the inner wall of the mounting hole, thus affecting the accuracy of monitoring. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a monitoring device for soil pressure in the surrounding rock of highway tunnels, which can avoid changes in the overall length of the device, thereby ensuring monitoring accuracy.

[0006] A monitoring device for soil pressure in the surrounding rock of a highway tunnel includes a tray on which a soil pressure cell is mounted. A sleeve is fixedly connected to the lower end face of the tray, and a screw rod is threaded into the sleeve. A rotating component is fixedly connected to one end of the screw rod, and the rotating component is rotatably connected to a base via a bearing seat. A fixing mechanism is provided between the sleeve and the base. The fixing mechanism includes a fixing plate fixed to the sleeve and an arc plate fixed to the base. An arc-shaped groove is formed on the fixing plate, and the arc plate is inserted into and slides within the groove. A fixing member is provided between the arc plate and the fixing plate.

[0007] Furthermore, the earth pressure box is fixed to the tray.

[0008] Furthermore, the arc plate has slots along its length.

[0009] Furthermore, the fixing member includes an insert plate that is inserted into and slides in the slot, and a retaining plate is detachably connected to the insert plate. The retaining plate is U-shaped and is snapped onto the fixing plate. The insert plate and the arc plate are fixedly connected by a welding piece.

[0010] Furthermore, the insert plate is located above the fixed plate.

[0011] Furthermore, the insert plate, the arc plate, and the welding piece are all made of aluminum alloy.

[0012] Furthermore, the cross-section of the rotating component is hexagonal.

[0013] Furthermore, multiple connecting rods are inserted into and slide within the base, and the ends of the connecting rods located outside the base are all fixedly connected to a limiting plate. The limiting plate and the bottom of the base are both screwed with fastening bolts.

[0014] Furthermore, a flange is provided at one end of the connecting rod located inside the base, and a spring is fixed between the flange and the inner wall of the base, with the spring sleeved on the connecting rod.

[0015] Furthermore, the tray is integrally formed with locking teeth.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, the insert plate is inserted into the slot and placed close to the fixed plate. Then, the opening of the clamping plate is clamped to the upper and lower end faces of the fixed plate. After tightening the fixing bolts, the welding plate is used to fix the insert plate and the arc plate together with the welding plate, thereby fixing the position between the fixing component and the arc plate. The U-shaped clamping plate is used to clamp the fixed plate, so that the position between the fixed plate and the arc plate remains unchanged, thereby fixing the relative position between the sleeve and the base. This ensures that the overall length of the device will not change after installation, ensuring that the earth pressure box fits the reserved installation hole on the surrounding rock and ensuring monitoring accuracy. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a monitoring device for soil pressure in the surrounding rock of a highway tunnel.

[0020] Figure 2 This is a breakdown diagram of a monitoring device for soil pressure in the surrounding rock of a highway tunnel.

[0021] Figure 3This is a partial structural diagram of a monitoring device for soil pressure in the surrounding rock of a highway tunnel.

[0022] Figure 4 This is a breakdown diagram of the fastener.

[0023] In the diagram: 1. Tray; 2. Earth pressure box; 3. Sleeve; 4. Lead screw; 5. Rotating component; 6. Bearing seat; 7. Base; 8. Fixing mechanism; 81. Fixing plate; 82. Arc plate; 83. Slide groove; 84. Fixing component; 841. Insert plate; 842. Fixing bolt; 843. Clamping plate; 844. Welding piece; 85. Slot; 9. Connecting rod; 10. Limiting plate; 11. Fastening bolt; 12. Flange; 13. Spring; 14. Clamping tooth. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Specific implementation examples:

[0026] like Figure 1-4 As shown, a monitoring device for soil pressure in the surrounding rock of a highway tunnel includes a tray 1, on which a soil pressure box 2 is mounted. The soil pressure box 2 is adhered to, snapped onto, or bound to the tray 1. A sleeve 3 is fixedly connected to the lower end face of the tray 1. A screw rod 4 is threadedly connected to the sleeve 3. A rotating component 5 is fixedly connected to one end of the screw rod 4 outside the sleeve 3. The rotating component 5 is rotatably connected to a base 7 via a bearing seat 6. A fixing mechanism 8 is provided between the sleeve 3 and the base 7. The fixing mechanism 8 is used to limit the distance between the sleeve 3 and the base 7 to prevent changes in the overall length of the device. The fixing mechanism 8 includes a fixing plate 81 fixedly connected to the sleeve 3 and an arc plate 82 fixedly connected to the base 7. An arc-shaped groove 83 is provided on the fixing plate 81. The arc plate 82 is inserted into and slides in the groove 83. A fixing component 84 is provided between the arc plate 82 and the fixing plate 81. The fixing component 84 can fix the relative position between the arc plate 82 and the fixing plate 81.

[0027] like Figure 1-4As shown, a slot 85 is provided on the arc plate 82 along its length direction; the fixing member 84 includes an insert plate 841 that is inserted into and slides in the slot 85. The insert plate 841 is located above the fixing plate 81. The insert plate 841 is detachably connected to a clamping plate 843 by a fixing bolt 842. The clamping plate 843 is U-shaped and clamps to the upper and lower end faces of the fixing plate 81. The insert plate 841 and the arc plate 82 are fixedly connected by a welding piece 844. The insert plate 841, the arc plate 82, and the welding piece 844 are all made of metal, such as stainless steel or aluminum alloy. In this embodiment, it is aluminum alloy. After the overall length of the device is adjusted and installed, the insert plate 841 is inserted into the slot 85 and close to the fixing plate 81. Then, the opening of the clamping plate 843 is clamped to the upper and lower end faces of the fixing plate 81. Finally, the fixing bolt 842 is tightened. The welding gun is used to fix the welding plate 844 between the insert plate 841 and the arc plate 82, thereby fixing the position between the fixing part 84 and the arc plate 82. The U-shaped clamping plate 843 is used to clamp the fixing plate 81, so that the position between the fixing plate 81 and the arc plate 82 remains unchanged, thereby fixing the relative position between the sleeve 3 and the base 7. After the device is installed, its overall length will not change, ensuring that the earth pressure box 2 fits the reserved installation hole on the surrounding rock and ensuring monitoring accuracy. If the device needs to be removed, the arc plate 82 and the insert plate 841 can be separated by cutting the welding plate 844 with an angle grinder, hammering, or hydraulic shears. Then, the fixing bolts 842 and the clamping plate 843 are removed. Then, the screw 4 is rotated to shorten the length of the device, and then the device is removed from the support.

[0028] like Figure 1-4 As shown, the cross-section of the rotating part 5 is hexagonal, which makes it convenient for workers to use a wrench to rotate the rotating part 5, thereby rotating the lead screw 4 and adjusting the overall length between the lead screw 4 and the sleeve 3.

[0029] like Figure 1-4 As shown, multiple connecting rods 9 are inserted and slidable inside the base 7. The ends of the connecting rods 9 located outside the base 7 are all fixedly connected to the limiting plate 10. The limiting plate 10 and the bottom of the base 7 are both threadedly connected with fastening bolts 11. After the earth pressure box 2 is inserted into the reserved installation hole, the screw 4 is rotated by rotating the rotating part 5 to adjust the overall length between the screw 4 and the sleeve 3 until the base 7 is close to the support (the support is a beam or column of a steel arch frame). The limiting plate 10 is pulled so that the limiting plate 10 and the base 7 clamp the support, and the fastening bolts 11 are tightened. (Through friction and screw connection) the position between the limiting plate 10 and the base 7 and the support is fixed, thus supporting the earth pressure box 2.

[0030] like Figure 1-4As shown, a flange 12 is provided at one end of the connecting rod 9 located inside the base 7. A spring 13 is fixedly connected between the flange 12 and the inner wall of the base 7. The spring 13 is sleeved on the connecting rod 9. When the spring 13 is in the normal state, the limiting plate 10 is attached to the base 7. Pulling the limiting plate 10 to move will compress the spring 13. Its force to restore deformation can enable the base 7 and the limiting plate 10 to cooperate with the fastening bolt 11 to clamp the support.

[0031] like Figure 1-4 As shown, the tray 1 is integrally formed with locking teeth 14 to prevent the earth pressure box 2 from falling out of the tray 1 in the mounting hole.

[0032] The working principle of the monitoring device for earth pressure in the surrounding rock of a highway tunnel in this embodiment is as follows: When in use, select a support (e.g., a beam or column of a steel arch frame) and a support point; drill an installation hole for the earth pressure box 2 on the surface of the soft surrounding rock corresponding to the support point. The hole diameter should be larger than the diameter of the earth pressure box 2, and the depth should be close to the height of the earth pressure box 2; insert the earth pressure box 2, which is fixed to the top of the device, into the installation hole; use a tool to rotate the screw 4 to extend the overall length of the device; when the base 7 approaches the support point, pull open the limiting plate 10 and continue rotating the screw 4 until the base 7 and the limiting plate 10 can clamp the support. Then, loosen the limiting plate 10 and tighten the fastening bolts 11 to secure the device. Finally, the insert plate 841 is inserted into the slot 85 and placed close to the fixed plate 81. Then, the opening of the clamping plate 843 is clamped to the upper and lower end faces of the fixed plate 81. After that, the fixing bolts 842 are tightened, and the welding plate 844 is used to fix the insert plate 841 and the arc plate 82 through the welding gun, thereby fixing the position between the fixing part 84 and the arc plate 82. The U-shaped clamping plate 843 is used to clamp the fixed plate 81, so that the position between the fixed plate 81 and the arc plate 82 remains unchanged, thereby fixing the relative position between the sleeve 3 and the base 7. After the device is installed, its overall length will not change, ensuring that the earth pressure box 2 fits the reserved installation hole on the surrounding rock and ensuring monitoring accuracy.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A monitoring device for earth pressure in the surrounding rock of a highway tunnel, characterized in that: The system includes a tray (1), on which a soil pressure box (2) is provided. A sleeve (3) is fixedly connected to the lower end face of the tray (1). A screw rod (4) is screwed into the sleeve (3). A rotating part (5) is fixedly connected to one end of the screw rod (4). The rotating part (5) is rotatably connected to the base (7) through a bearing seat (6). A fixing mechanism (8) is provided between the sleeve (3) and the base (7). The fixing mechanism (8) includes a fixing plate (81) fixed to the sleeve (3) and an arc plate (82) fixed to the base (7). An arc-shaped groove (83) is opened on the fixing plate (81). The arc plate (82) is inserted into and slides in the groove (83). A fixing member (84) is provided between the arc plate (82) and the fixing plate (81).

2. The monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 1, characterized in that: The earth pressure box (2) is fixed on the tray (1).

3. The monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 1, characterized in that: The arc plate (82) has a slot (85) along its length.

4. The monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 3, characterized in that: The fastener (84) includes a insert plate (841) that is inserted into and slides in the slot (85). A retaining plate (843) is detachably connected to the insert plate (841). The retaining plate (843) is U-shaped and is snapped onto the fixing plate (81). The insert plate (841) and the arc plate (82) are fixedly connected by a welding piece (844).

5. The monitoring device for soil pressure in the surrounding rock of a highway tunnel according to claim 4, characterized in that: The insert plate (841) is located above the fixed plate (81).

6. The monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 4, characterized in that: The insert plate (841), the arc plate (82), and the welding piece (844) are all made of aluminum alloy.

7. The monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 1, characterized in that: The cross-section of the rotating component (5) is hexagonal.

8. The monitoring device for soil pressure in the surrounding rock of a highway tunnel according to claim 1, characterized in that: Multiple connecting rods (9) are inserted into and slide within the base (7). The ends of the connecting rods (9) located outside the base (7) are fixedly connected to the limiting plate (10). The limiting plate (10) and the bottom of the base (7) are both screwed with fastening bolts (11).

9. A monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 8, characterized in that: The connecting rod (9) has a flange (12) at one end inside the base (7). A spring (13) is fixed between the flange (12) and the inner wall of the base (7). The spring (13) is sleeved on the connecting rod (9).

10. A monitoring device for earth pressure in the surrounding rock of a highway tunnel according to claim 1, characterized in that: The tray (1) is integrally formed with a locking tooth (14).

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