Embedded anchoring device for small-section tunnel

Abstract

The utility model provides an embedded anchoring device for a small-section tunnel, which comprises a lining plate, the lining plate comprises a plurality of inner lining plates, each inner lining plate is provided with two mounting grooves, each mounting groove is provided with an anchoring hole, the inner wall of each inner lining plate is provided with a detachable mounting device, two ends of each mounting device are provided with sliding movable plates, and one side of each movable plate is provided with a flange nut. And an anchor rod is arranged on the flange nut. Due to the limitation of the flange nut, the anchor rod does not shake when penetrating into the anchor hole, so that the anchor rod is perpendicular to the clamping plate and does not incline, the accuracy of the installation angle of the anchor rod is improved, and the situation that due to the inclination of the anchor rod, load distribution of the whole structure is uneven, local stress is increased, and the contact area between the anchor rod and a surrounding base material is affected is avoided. Therefore, the bonding effect is reduced, and the phenomenon of anchoring failure possibly occurs seriously. And meanwhile, the phenomena that the anchor rod is inclined, so that filling is not easy when chemical glue is injected, gaps are formed, the anti-pulling capacity is weakened, and the anchoring strength is affected are avoided.

Description

Technical Field

[0001] The utility model relates to the field of tunnels, in particular to a pre-embedded anchoring device for small-section tunnels. Background Art

[0002] The construction of small-section tunnels is a common tunnel construction method, usually used in cases with good geological conditions and small tunnel sections. The purpose is to enhance the stability of the tunnel structure and prevent collapse and displacement. This anchoring method usually uses chemical anchoring, materials such as anchor bolts and anchor cables. By drilling holes and injecting chemical anchoring agents into the holes, the anchor bolts are fixed in the rock mass or soil mass. However, the diameter of the anchoring holes on the existing lining plates is usually larger than the diameter of the anchor bolts. After the anchor bolts are inserted into the anchoring holes containing chemical anchoring agents, the anchor bolts will not be perpendicular to the arc surface of the lining plate after insertion, and there is a certain inclination angle relative to the lining plate. The installation angle accuracy of the anchor bolts is not high, resulting in uneven load distribution of the overall structure, increasing local stress. The inclination will affect the contact area with the surrounding base materials, thereby reducing the bonding effect, and may seriously lead to anchoring failure. At the same time, the inclination of the anchor bolts may make it difficult to fill when injecting chemical glue, forming voids, weakening the anti-pulling ability, and affecting the anchoring strength. For this reason, we propose a pre-embedded anchoring device for small-section tunnels to solve the above problems. Summary of the Utility Model

[0003] The utility model provides a pre-embedded anchoring device for small-section tunnels, which solves the problems that when chemically anchoring small-section tunnels, the diameter of the anchoring holes is usually larger than the diameter of the anchor bolts, the installation angle of the anchor bolts is inclined, resulting in uneven load distribution of the overall structure, weakening of the anti-pulling ability, and affecting the anchoring strength.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a pre-embedded anchoring device for small-section tunnels, including a lining plate, the lining plate includes a plurality of inner lining plates, two installation grooves are provided on the inner lining plates, anchoring holes are provided on the installation grooves, a detachable installation device is provided on the inner wall of the inner lining plate, sliding movable plates are provided at both ends of the installation device, a flange nut is provided on one side of the movable plate, and an anchor bolt is provided on the flange nut.

[0005] In a preferred solution, a plurality of installation holes are provided on the inner wall of the inner lining plate, an arc-shaped groove is provided on one side of the installation groove, and the inner lining plate is of an arc-shaped structure.

[0006] In a preferred solution, the installation device includes an arc-shaped plate, side plates are provided at both ends of the arc-shaped plate, clamping plates are provided at the bottoms of the side plates, and the clamping plates are provided with sliding movable plates.

[0007] In a preferred solution, the arc-shaped plate abuts against the inner lining plate, a handle is provided on the arc-shaped plate, a plurality of second installation holes are provided on the arc-shaped plate, and a first bolt passes through the second installation holes and the installation holes.

[0008] In a preferred embodiment, the clamping plate is located on one side of the bottom of the side plate. A plurality of first through holes are provided on the side surface of the side plate, and a plurality of screw rods are provided on the movable plate. The screw rods pass through the first through holes, and one end of each screw rod is connected by a first nut.

[0009] When the clamping plate and the movable plate are closed, the bottom of the flange nut abuts against the clamping plate and the movable plate.

[0010] In a preferred embodiment, a plurality of threaded holes are provided on both the clamping plate and the movable plate, and the second bolts are installed in the threaded holes through the third through holes.

[0011] The beneficial effects of the present utility model are as follows: A plurality of anchor holes are drilled in the tunnel cross-section, and chemical anchor agents are injected into the anchor holes. The arc-shaped plate of the installation device abuts against the inner wall surface of the lining plate. The first bolts are installed in the installation holes through the second installation holes. The screw rods on the movable plate pass through the first through holes, and one end of each screw rod is connected by a first nut to close the clamping plate and the movable plate. The second bolts are installed in the threaded holes through the third through holes to install the flange nuts on the clamping plate and the movable plate. The anchor rod is manually rotated so that the anchor rod passes through the flange nut and extends deep into the anchor hole. Due to the limitation of the flange nut, the anchor rod will not shake when extending into the anchor hole, so that the anchor rod is perpendicular to the clamping plate, so that the anchor rod will not tilt, so as to improve the accuracy of the installation angle of the anchor rod, avoid the uneven load distribution of the overall structure caused by the tilt of the anchor rod, increase the local stress, affect the contact area between the anchor rod and the surrounding base material, thereby reducing the bonding effect, and seriously may lead to the phenomenon of anchor failure. At the same time, it avoids the phenomenon that it is not easy to fill when injecting chemical glue due to the tilt of the anchor rod, forming voids and weakening the anti-pulling ability, affecting the anchoring strength, and has great popularization value. Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0013] Figure 1 is the front view of the overall structure of the present utility model;

[0014] Figure 2 is the axonometric view of the overall structure of the present utility model;

[0015] Figure 3 is the axonometric view of the overall structure of the present utility model from another perspective;

[0016] Figure 4 is the axonometric view of the lining plate of the present utility model;

[0017] Figure 5 is the axonometric view of the partial structure of the present utility model;

[0018] Figure 6 is the exploded view of the partial structure of the present utility model;

[0019] Figure 7 is an axonometric view of the installation device of the present utility model;

[0020] In the figure: liner plate 1; inner liner plate 101; installation groove 102; anchoring hole 103; installation hole 104; arc groove 105; installation device 2; arc plate 201; handle 2021; second installation hole 2022; side plate 202; clamping plate 203; first through hole 2031; movable plate 204; screw rod 2041; threaded hole 205; anchor bolt 3; flange nut 4; third through hole 401. Specific implementation mode

[0021] Embodiment 1:

[0022] As shown in Figure 1-7 , for the embedded anchoring device in a small-section tunnel, it includes a liner plate 1. The liner plate 1 includes a plurality of inner liner plates 101. Two installation grooves 102 are provided on the inner liner plate 101. Anchoring holes 103 are provided on the installation grooves 102. A detachable installation device 2 is provided on the inner wall of the inner liner plate 101. Sliding movable plates 204 are provided at both ends of the installation device 2. A flange nut 4 is provided on one side of the movable plate 204. An anchor bolt 3 is provided on the flange nut 4. With this structure, a plurality of anchor holes are drilled on the tunnel cross-section, chemical anchoring agent is injected into the anchor holes. The arc plate 201 of the installation device 2 abuts against the inner wall surface of the inner liner plate 101, and is installed on the installation hole 104 through a first bolt passing through the second installation hole 2022. The screw rod 2041 on the movable plate 204 passes through the first through hole 2031, and one end of the screw rod 2041 is connected through a first nut to close the clamping plate 203 and the movable plate 204. A second bolt passes through the third through hole 401 and is installed on the threaded hole 205 to install the flange nut 4 on the clamping plate 203 and the movable plate 204. Manually rotate the anchor bolt 3 to make the anchor bolt 3 pass through the flange nut 4 and penetrate into the anchor hole. Due to the limitation of the flange nut 4, the anchor bolt 3 will not shake when penetrating into the anchor hole, so that the anchor bolt 3 is perpendicular to the clamping plate 203, so that the anchor bolt 3 will not tilt, so as to improve the accuracy of the installation angle of the anchor bolt, avoid the uneven load distribution of the overall structure caused by the tilt of the anchor bolt 3, increase the local stress, affect the contact area between the anchor bolt 3 and the surrounding base material, thereby reducing the bonding effect, and seriously may lead to the phenomenon of anchoring failure. At the same time, avoid the phenomenon that it is not easy to fill when injecting chemical glue due to the tilt of the anchor bolt 3, forming voids, weakening the anti-pulling ability, and affecting the anchoring strength.

[0023] The clamping plate 203 is provided with a sliding movable plate 204. After the anchor bolt 3 is firmly installed, the second bolt on the flange nut 4 is removed, and the flange nut 4 rotates in the reverse direction so that the flange nut 4 moves away from the clamping plate 203, and the clamping plate 203 and the movable plate 204 are opened, so that the clamping plate 203 and the movable plate 204 of the installation device 2 can be removed from the flange nut 4. The first bolt on the arc-shaped plate 201 is removed so that the installation device 2 can be removed from the inner lining plate 101. Then the flange nut 4 is rotated forward so that the flange nut 4 abuts against the installation groove 102. The overall device is quick to install and disassemble, and the structure is simple.

[0024] In a preferred solution, a plurality of installation holes 104 are provided on the inner wall of the inner lining plate 101, an arc-shaped groove 105 is provided on one side of the installation groove 102, and the inner lining plate 101 is of an arc-shaped structure. With this structure, the arc-shaped groove 105 facilitates the staff to install the anchor bolt 3 and gives the staff an operating space, and the installation groove 102 is used to place the side plate 202, the clamping plate 203 and the movable plate 204.

[0025] In a preferred solution, the installation device 2 includes an arc-shaped plate 201, side plates 202 are provided at both ends of the arc-shaped plate 201, a clamping plate 203 is provided at the bottom of the side plate 202, and the clamping plate 203 is provided with a sliding movable plate 204. With this structure, the clamping plate 203 is provided with a sliding movable plate 204, and the structure of the opening and closing clamping plate 203 and movable plate 204 enables the clamping plate 203 and the movable plate 204 to pass through the flange nut 4 when the overall device is disassembled.

[0026] In a preferred solution, the arc-shaped plate 201 abuts against the inner lining plate 101, a handle 2021 is provided on the arc-shaped plate 201, a plurality of second installation holes 2022 are provided on the arc-shaped plate 201, and the first bolt passes through the second installation holes 2022 and the installation holes 104. With this structure, the clamping plate 203 is provided with a sliding movable plate 204. After the anchor bolt 3 is firmly installed, the second bolt on the flange nut 4 is removed, and the flange nut 4 rotates in the reverse direction so that the flange nut 4 moves away from the clamping plate 203, and the clamping plate 203 and the movable plate 204 are opened, so that the clamping plate 203 and the movable plate 204 of the installation device 2 can be removed from the flange nut 4. The first bolt on the arc-shaped plate 201 is removed so that the installation device 2 can be removed from the inner lining plate 101. The overall device is quick to install and disassemble.

[0027] In a preferred solution, the clamping plate 203 is located on one side at the bottom of the side plate 202, a plurality of first through holes 2031 are provided on the side surface of the side plate 202, a plurality of screw rods 2041 are provided on the movable plate 204, the screw rods 2041 pass through the first through holes 2031, and one end of the screw rod 2041 is connected by a first nut;

[0028] When the clamping plate 203 and the movable plate 204 are closed, the bottom of the flange nut 4 abuts against the clamping plate 203 and the movable plate 204. With this structure, the clamping plate 203 and the movable plate 204 are flat structures, and the plane of the clamping plate 203 is parallel to the cross-section of the anchoring hole 103. Due to the limitation of the flange nut 4, when the anchor bolt 3 penetrates into the anchor hole, it will not shake, so that the anchor bolt 3 is perpendicular to the clamping plate 203, so that the anchor bolt 3 penetrates into the anchor hole perpendicular to the inner lining plate 101, so that the anchor bolt 3 will not tilt. To improve the accuracy of the installation angle of the anchor bolt and avoid the phenomenon that uneven load distribution of the overall structure, increased local stress, and reduced contact area between the anchor bolt 3 and the surrounding base material caused by the tilt of the anchor bolt 3, thereby reducing the bonding effect and seriously possibly leading to the failure of anchoring. At the same time, avoid the phenomenon that it is not easy to fill when injecting chemical glue due to the tilt of the anchor bolt 3, forming voids, weakening the anti-pulling ability, and affecting the anchoring strength.

[0029] In a preferred solution, a plurality of threaded holes 205 are provided on both the clamping plate 203 and the movable plate 204, and the second bolt is installed in the threaded hole 205 through the third through hole 401. With this structure, after the anchor bolt 3 is tightly installed, the second bolt on the flange nut 4 is disassembled, and the flange nut 4 rotates reversely, so that the flange nut 4 is away from the clamping plate 203, and the clamping plate 203 and the movable plate 204 are opened, so that the clamping plate 203 and the movable plate 204 of the installation device 2 can be disassembled from the flange nut 4.

[0030] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations to the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. Embedded anchoring device for small-section tunnel, characterized in that: It includes a lining plate (1), the lining plate (1) includes a plurality of inner lining plates (101), two mounting grooves (102) are provided on the inner lining plate (101), an anchoring hole (103) is provided on the mounting groove (102), and a detachable mounting device (2) is provided on the inner wall of the inner lining plate (101). Sliding movable plates (204) are provided at both ends of the mounting device (2), a flange nut (4) is provided on one side of the movable plate (204), and an anchor rod (3) is provided on the flange nut (4).

2. The pre-embedded anchoring device for small-section tunnels according to claim 1, characterized in that: A plurality of mounting holes (104) are provided on the inner wall of the inner lining plate (101), an arc-shaped groove (105) is provided on one side of the mounting groove (102), and the inner lining plate (101) is of an arc-shaped structure.

3. The embedded anchoring device for small-section tunnels according to claim 1, characterized in that: The mounting device (2) includes an arc-shaped plate (201), side plates (202) are provided at both ends of the arc-shaped plate (201), a clamping plate (203) is provided at the bottom of the side plate (202), and a sliding movable plate (204) is provided on the clamping plate (203).

4. The embedded anchoring device for small-section tunnels according to claim 3, characterized in that: The arc-shaped plate (201) abuts against the inner lining plate (101), a handle (2021) is provided on the arc-shaped plate (201), a plurality of second mounting holes (2022) are provided on the arc-shaped plate (201), and a first bolt passes through the second mounting hole (2022) and the mounting hole (104).

5. The embedded anchoring device for small-section tunnels according to claim 3, characterized in that: The clamping plate (203) is located on one side of the bottom of the side plate (202), a plurality of first through holes (2031) are provided on the side surface of the side plate (202), a plurality of screw rods (2041) are provided on the movable plate (204), the screw rods (2041) pass through the first through holes (2031), and one end of the screw rod (2041) is connected by a first nut; When the clamping plate (203) and the movable plate (204) are closed, the bottom of the flange nut (4) abuts against the clamping plate (203) and the movable plate (204).

6. The embedded anchoring device for small cross-section tunnels according to claim 5, characterized in that: A plurality of threaded holes (205) are provided on both the clamping plate (203) and the movable plate (204), and a second bolt is installed in the threaded hole (205) through the third through hole (401).

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