A high slope locking section seismic support structure and seismic resistance method thereof

Abstract

The present invention discloses a seismic support structure for a high slope locking section, comprising a seismic flexible support structure, wherein the seismic flexible support structure comprises a flexible concrete support frame provided on the slope surface and a plurality of seismic anchor rods; the seismic anchor rod comprises a rod body and an anchor head provided at one end of the rod body, an end of the rod body away from the anchor head is provided with a seismic section, and the anchor head comprises a pad movably sleeved on the outer wall of the rod body, a protective shell provided on the pad, a rigid support portion horizontally provided in the protective shell, and a seismic device provided at the connection between the rigid support portion and the rod body. The seismic section in the seismic anchor rod of this technical solution is in elastic contact with the hardened cement slurry poured into the slope through a damping boss, and at the same time, the axial and tangential seismic forces caused by the earthquake are absorbed and buffered by the compression between the first and second curved steel plate strips and the rigid support portion, thereby exerting stable seismic resistance and avoiding situations such as the anchor rod being pulled off and the anchor body being pulled out.

Description

Technical Field

[0001] The present invention relates to the technical field of slope reinforcement, in particular to a high slope locking section anti-seismic support structure and an anti-seismic method thereof. Background Art

[0002] Locked sections are a common geological structure found in natural slopes. In practical engineering, locked sections are mainly unpenetrated sections at the potential sliding surface of the slope.

[0003] When the locking section of the slope is completely broken, the sliding body will move in the form of debris flow with huge kinetic energy, which will cause huge economic losses to people's lives and property. At present, the locking section of high slopes is generally reinforced with anchor support structures. The reinforced high slope locking section is not easy to break, thereby reducing the probability of slope instability. Although the anchor support structures currently on the market can play a supporting and reinforcing role, their seismic resistance needs to be improved. Under the action of earthquakes, the anchor rods in the anchor support structure are easily broken and the anchor bodies are pulled out due to vibration, affecting the support and reinforcement stability of the high slope locking section. To this end, we propose a seismic support structure for the locking section of high slopes and a seismic resistance method thereof. Summary of the Invention

[0004] The object of the present invention is to provide a high slope locking section seismic support structure and a seismic resistance method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A seismic support structure for a high slope locking section, comprising a seismic flexible support structure, wherein the seismic flexible support structure comprises a flexible concrete support frame provided on the slope surface and a plurality of groups of seismic anchor rods;

[0007] The seismic anchor rod includes a rod body and an anchor head provided at one end of the rod body, an anti-seismic section is provided at the end of the rod body away from the anchor head, the anchor head includes a pad movably sleeved on the outer wall of the rod body, a protective shell provided on the pad, a rigid support part horizontally provided in the protective shell, and an anti-seismic device provided at the connection between the rigid support part and the rod body, a through hole is opened on the pad for the rod body to extend into, and the diameter of the through hole is larger than the diameter of the rod body.

[0008] A further improvement is that the seismic section includes a hollow sleeve fixed to one end of the rod body, the inner cavity of the hollow sleeve is movably provided with two groups of movable plates, and the two groups of movable plates are provided with multiple groups of damping protrusions on the opposite sides. The outer wall of the hollow sleeve is provided with a through opening for the damping protrusions to extend out, the movable plate is connected to the inner wall of the hollow sleeve by a spring, and a driving member is provided between the two groups of movable plates to drive the two groups of movable plates to move away from each other.

[0009] A further improvement is that the upper and lower ends of the opposite sides of the two groups of movable plates are provided with inclined surfaces, and the inclined surfaces are inclined from the outer end of the movable plate to the inner side of the center of the movable plate. The driving member includes a bidirectional screw vertically located between the two groups of movable plates, and the upper and lower ends of the outer walls of the bidirectional screw are threaded with moving blocks, and balls are provided on both sides of the moving block through the top rod, and ball grooves adapted to the balls are provided on the inclined surfaces of the two groups of movable plates. One end of the bidirectional screw is connected to a driving rod, and the driving rod passes through the rod body and extends into the protective shell to be connected to a driving handwheel.

[0010] A further improvement is that the seismic anti-vibration device includes multiple groups of arc-shaped steel strips 1 arranged along a circular array on the outer wall of the circumference of the rod body, the rigid support part is provided with a through opening for accommodating the rod body and the arc-shaped steel strips 1, both ends of the arc-shaped steel strips 1 are integrated with extension parts, and one side of the two groups of the extension parts is provided with arc-shaped steel strips 2, and the arc surfaces of the two groups of the arc-shaped steel strips 2 are respectively in contact with the upper and lower surfaces of the rigid support part, and the extension part is provided with a fixing part for fixing to the rod body.

[0011] A further improvement is that the arcuate surface of the arcuate steel strip 1 faces the inner wall of the through-hole, and the inner wall of the through-hole is provided with an arcuate groove adapted to the arcuate surface of the arcuate steel strip 1.

[0012] A further improvement is that a detachable shell cover is provided on the top of the protective shell.

[0013] A seismic resistance method for a high slope locking section seismic support structure, specifically comprising the following steps:

[0014] S1: Determine the seismic support points according to the location of the high slope locking section and install the seismic support structure at the seismic support points;

[0015] S2: When an earthquake occurs during the reinforcement and support of the high slope locking section of the seismic support structure, the seismic anchor rods are subjected to the transmitted axial and tangential seismic forces. The hardened cement slurry is squeezed into the slope through the seismic section to achieve axial and tangential seismic resistance of the seismic anchor rods. At the same time, the seismic force is transmitted to the seismic device, which squeezes the rigid support part through the seismic device to offset and absorb the seismic force, thereby achieving further seismic resistance of the seismic anchor rods.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This technical solution adopts a flexible concrete support frame and seismic anchor rods to provide support and reinforcement for the high slope locking section. The flexible concrete support frame allows the high slope to produce moderate deformation, thereby releasing part of the energy to achieve seismic effect. The seismic section in the seismic anchor rod is in elastic contact with the hardened cement slurry poured into the slope through the damping boss. At the same time, the extrusion between the arc-shaped steel strips 1 and 2 and the rigid support part is used to absorb and buffer the axial and tangential seismic forces brought by the earthquake, thereby exerting stable seismic performance and avoiding the occurrence of anchor rod breakage, anchor body pullout, etc. At the same time, it can automatically return to the pre-earthquake state after the earthquake, ensuring the stability of the support and reinforcement of the high slope locking section by the seismic anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 Schematic diagram of the seismic anchor structure of the present invention;

[0020] Figure 3 Schematic diagram of the seismic section structure in the present invention;

[0021] Figure 4 It is a schematic structural diagram of the anti-seismic device in the present invention.

[0022] In the figure: 1. Seismic flexible support structure; 2. Flexible concrete support frame; 3. Rod body; 4. Anchor head; 5. Seismic section; 51. Hollow sleeve; 52. Movable plate; 53. Damping boss; 54. Spring; 55. Inclined surface; 56. Bidirectional lead screw; 57. Push rod; 6. Driving rod; 7. Pad; 8. Protective shell; 9. Rigid support part; 10. Seismic device; 101. Arc-shaped steel plate 1; 102. Extension part; 103. Arc-shaped steel plate 2; 104. Fixing part. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1

[0025] Please see the attached Figure 1 -Attached Figure 2A seismic support structure for a high slope locking section includes a seismic flexible support structure 1, which includes a flexible concrete support frame 2 provided on the slope surface and multiple groups of seismic anchor rods. The flexible concrete support frame 2 is of prior art, for example, cast from graphite steel fiber foam concrete and will not be described in detail herein. The seismic anchor rods are inserted into the high slope and then grouted to reinforce the high slope locking section, making the high slope locking section less susceptible to sudden brittle fracture.

[0026] The seismic anchor rod includes a rod body 3 and an anchor head 4 provided at one end of the rod body 3. An anti-seismic section 5 is provided at the end of the rod body 3 away from the anchor head 4. The anchor head 4 includes a pad 7 movably sleeved on the outer wall of the rod body 3, a protective shell 8 provided on the pad 7, a rigid support part 9 horizontally provided in the protective shell 8, and an anti-seismic device 10 provided at the connection between the rigid support part 9 and the rod body 3. The rigid support part 9 and the protective shell 8 are integrally formed. The top of the protective shell 8 is removably provided with a shell cover to facilitate later internal maintenance. The pad 7 is provided with a through hole for the rod body 3 to extend into, and the diameter of the through hole is larger than the diameter of the rod body 3, so as to leave space for relative movement under the action of an earthquake. The pad 7 belongs to the existing technology. The pad 7 is installed on the surface of a pedestal on the slope, for example.

[0027] Please see the attached Figure 3 Preferably, the seismic section 5 of this embodiment includes a hollow sleeve 51 fixed to one end of the rod body 3. Two sets of movable plates 52 are movably disposed within the hollow sleeve 51. Each set of movable plates 52 is provided with multiple sets of damping protrusions 53 on opposite sides of the two sets of movable plates 52. The outer wall of the hollow sleeve 51 is provided with openings through which the damping protrusions 53 extend. The movable plates 52 are connected to the inner wall of the hollow sleeve 51 via springs 54. A driving member is provided between the two sets of movable plates 52 to drive the two sets of movable plates 52 away from each other. After the seismic anchor is inserted into a hole drilled in the slope, the driving member drives the two sets of movable plates 52 away from each other, causing the damping protrusions 53 to extend from the openings. Grout is then poured into the hole. The elastic compression between the damping protrusions 53 and the hardened cement grout absorbs and buffers the vibration imparted to the seismic anchor by earthquakes.

[0028] Preferably, the upper and lower ends of the two sets of movable plates 52 on the opposite side of this embodiment are provided with inclined surfaces 55, and the inclined surfaces 55 are inclined from the outer end of the movable plate 52 to the inner side of the center of the movable plate 52. The driving member includes a bidirectional screw 56 vertically located between the two sets of movable plates 52, and the upper and lower ends of the outer walls of the bidirectional screw 56 are threaded with moving blocks, and balls are provided on both sides of the moving blocks through the top rod 57. Ball grooves adapted to the balls are provided on the inclined surfaces 55 of the two sets of movable plates 52. Through the balls and the ball grooves, the bidirectional screw 56 will not drive the moving block to rotate when it rotates, so that the moving block can move stably along the axis of the bidirectional screw 56. One end of the bidirectional screw 56 is connected to a driving rod 6, and the driving rod 6 passes through the rod body 3 and extends into the protective shell 8 to be connected to a driving handwheel. By driving the handwheel to rotate the driving rod 6, the bidirectional screw 56 is driven. The bidirectional screw 56 drives the upper and lower moving blocks closer to each other. The moving blocks cooperate with the inclined surface of the movable plate 52 through the push rod 57 and the ball bearing to make the two groups of movable plates 52 move away from each other.

[0029] Please see the attached Figure 4 Preferably, the seismic device 10 of this embodiment includes a plurality of groups of curved steel strips 101 arranged along a circular array on the outer circumferential wall of the rod body 3. The two ends of the curved steel strips 101 face the rod body 3. The rigid support portion 9 is provided with openings for accommodating the rod body 3 and the curved steel strips 101. Both ends of the curved steel strips 101 are integrally provided with extensions 102. One side of each group of extensions 102 is provided with a curved steel strip 2 103. The curved surfaces of the two groups of curved steel strips 2 103 respectively abut against the upper and lower surfaces of the rigid support portion 9. The extensions 102 are provided with fixing members 104 for fixing to the rod body 3. When the tangential and axial vibrations of the seismic load act on the support system, the curved steel strips 101 and 103 in the seismic device 10 and the rigid support portion 9 are squeezed and deformed to absorb and buffer the load, thereby maintaining the stability of the seismic anchor rod.

[0030] Preferably, the curved surface of the curved steel plate strip 101 of this embodiment faces the inner wall of the opening, and the inner wall of the opening is provided with a curved groove adapted to the curved surface of the curved steel plate strip 101. When the seismic load acts tangentially on the support system, shock absorption and energy consumption are achieved through the extrusion between the curved surface of the curved steel plate strip 101 and the curved groove.

[0031] A seismic resistance method for a high slope locking section seismic support structure, specifically comprising the following steps:

[0032] S1: Determine the seismic support points according to the location of the high slope locking section and install the seismic support structure at the seismic support points;

[0033] S2: When an earthquake occurs during the reinforcement and support of the high slope locking section by the seismic support structure, the seismic anchor rod is subjected to the transmitted axial seismic force and tangential seismic force. The hardened cement slurry poured into the slope is elastically squeezed by the damping boss 53 in the seismic section 5, thereby achieving axial and tangential seismic resistance of the seismic anchor rod. At the same time, the seismic force is transmitted to the seismic device 10, and the rigid support part 9 is squeezed by the arc-shaped steel plate strip 101 and the arc-shaped steel plate strip 2 103 in the seismic device 10. The seismic force is offset and absorbed by the deformation of the arc-shaped steel plate strip 101 and the arc-shaped steel plate strip 2 103, thereby achieving further seismic resistance of the seismic anchor rod.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high slope locking section seismic support structure, characterized by: The invention comprises an anti-seismic flexible support structure (1), wherein the anti-seismic flexible support structure (1) comprises a flexible concrete support frame (2) arranged on the slope surface and a plurality of groups of anti-seismic anchor rods; The seismic anchor rod comprises a rod body (3) and an anchor head (4) provided at one end of the rod body (3); an anti-seismic section (5) is provided at one end of the rod body (3) away from the anchor head (4); the anchor head (4) comprises a pad (7) movably sleeved on the outer wall of the rod body (3), a protective shell (8) provided on the pad (7), a rigid support portion (9) horizontally provided in the protective shell (8), and an anti-seismic device (10) provided at the connection between the rigid support portion (9) and the rod body (3); a through hole is provided on the pad (7) for the rod body (3) to extend into, and the diameter of the through hole is larger than the diameter of the rod body (3); The anti-seismic device (10) includes a plurality of groups of arc-shaped steel strips (101) arranged along a circular array on the outer circumference of the rod body (3), the rigid support portion (9) is provided with a through opening for accommodating the rod body (3) and the arc-shaped steel strips (101), both ends of the arc-shaped steel strips (101) are integrally provided with extension portions (102), and one side of the two groups of the extension portions (102) is provided with arc-shaped steel strips (103), the arc surfaces of the two groups of the arc-shaped steel strips (103) are respectively in contact with the upper and lower surfaces of the rigid support portion (9), and the extension portion (102) is provided with a fixing member (104) for fixing to the rod body (3).

2. The high slope locking section seismic support structure according to claim 1, characterized in that: The anti-seismic section (5) comprises a hollow sleeve (51) fixed to one end of the rod body (3); the inner cavity of the hollow sleeve (51) is movably provided with two groups of movable plates (52); the two groups of movable plates (52) are provided with multiple groups of damping protrusions (53) on opposite sides; the outer wall of the hollow sleeve (51) is provided with a through hole for the damping protrusions (53) to extend out; the movable plate (52) is connected to the inner wall of the hollow sleeve (51) via a spring (54); and a driving member is provided between the two groups of movable plates (52) to drive the two groups of movable plates (52) to move away from each other.

3. The high slope locking section seismic support structure according to claim 2, characterized in that: The upper and lower ends of the two groups of movable plates (52) on one side are both provided with inclined surfaces (55), and the inclined surfaces (55) are inclined from the outer end of the movable plate (52) to the inner side of the center of the movable plate (52). The driving member includes a bidirectional screw (56) vertically located between the two groups of movable plates (52). The upper and lower ends of the outer wall of the bidirectional screw (56) are both threaded with moving blocks, and both sides of the moving block are provided with balls through the top rod (57). Ball slides adapted to the balls are opened on the inclined surfaces (55) of the two groups of movable plates (52). One end of the bidirectional screw (56) is connected to a driving rod (6), and the driving rod (6) passes through the rod body (3) and extends into the protective shell (8) to be connected to a driving handwheel.

4. The seismic support structure according to claim 1, characterized in that: The arcuate surface of the arcuate steel strip 1 (101) faces the inner wall of the through-hole, and the inner wall of the through-hole is provided with an arcuate groove adapted to the arcuate surface of the arcuate steel strip 1 (101).

5. The high slope locking section seismic support structure according to claim 1, characterized in that: The top of the protective shell (8) is detachably provided with a shell cover.

6. A seismic resistance method for a high slope locking section seismic support structure according to any one of claims 1 to 5, characterized in that: The specific steps include: S1: Determine the seismic support points according to the location of the high slope locking section and install the seismic support structure at the seismic support points; S2: When an earthquake occurs during the reinforcement and support of the high slope locking section by the seismic support structure, the seismic anchor rod is subjected to the transmitted axial and tangential seismic forces. The hardened cement slurry is squeezed into the slope through the seismic section (5), thereby achieving axial and tangential seismic resistance of the seismic anchor rod. At the same time, the seismic force is transmitted to the seismic device (10), and the rigid support part (9) is squeezed by the seismic device (10), thereby offsetting and absorbing the seismic force, thereby achieving further seismic resistance of the seismic anchor rod.

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