Prestressed self-adjusting anchor cable frame beam structure and method thereof

Abstract

The application discloses a prestressed self-adjusting anchor cable frame beam structure and a method thereof, and relates to the technical field of anchor cable frame beams.The technical scheme is characterized in that the prestressed self-adjusting anchor cable frame beam structure comprises a frame beam main body, and further comprises self-tightening mechanisms arranged on both sides of the staggered parts of longitudinal beams and cross beams of the frame beam main body; the self-tightening mechanisms are fixed with the staggered parts of longitudinal beams and cross beams of the frame beam main body through connecting steel cables arranged thereon; and the anchoring force of the self-tightening mechanisms to the slope is increased when the tension of the connecting steel cables is increased.The prestressed self-adjusting anchor cable frame beam structure can install the self-tightening mechanisms on both sides of the longitudinal beams and cross beams of the anchor cable frame beam, thereby providing additional anchoring points for the frame beam; and when the main anchoring points of the frame beam are caused to be reduced in anchoring force due to soil creep, the self-tightening mechanisms can strengthen the anchoring force to the slope to maintain the installation stability of the frame beam.

Description

Technical Field

[0001] This invention relates to the field of anchor cable frame beam technology, and specifically to a prestressed self-adjusting anchor cable frame beam structure and method thereof. Background Technology

[0002] During tunnel construction, there are often steep slopes and exposed bedrock above the tunnel roof. Therefore, it is necessary to install anchor cable frame beams to protect the slope. The anchor cable frame beams are stabilized by anchor cables on the slope. However, due to slope creep and external environmental interference, insufficient prestress of the anchor cables can easily occur, which can lead to loosening of the overall anchorage of the frame beams and bring about construction safety hazards.

[0003] In view of this, a design or technical improvement is proposed to solve the above problems.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a prestressed self-adjusting anchor cable frame beam structure and its method.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A prestressed self-adjusting anchor cable frame beam structure includes a frame beam body and a self-tightening mechanism disposed on both sides of the intersection of the longitudinal beams and transverse beams of the frame beam body.

[0008] The self-tightening mechanism is fixed to the intersecting part of the longitudinal and transverse beams of the frame beam body by the connecting steel cable set thereon. When the tension of the connecting steel cable increases, the anchoring force of the self-tightening mechanism on the slope increases.

[0009] Furthermore, the self-tightening mechanism includes a pile body and an expansion portion and a pile spike portion disposed on the pile body.

[0010] Furthermore, the pile body includes an inner cylinder, an outer cylinder disposed outside the inner cylinder and having a length shorter than the inner cylinder, and a drive rod movably disposed within the inner cylinder.

[0011] Furthermore, the inner cylinder has a movable chamber, and the drive rod includes a pusher head that moves within the movable chamber, a threaded rod that is threadedly connected to the inner cylinder, and a hub located at the end of the threaded rod away from the pusher head and connected to the connecting steel cable.

[0012] Furthermore, the expansion section includes a movable slot that penetrates the inner cylinder and the outer cylinder sidewalls, and a support plate that slides within the movable slot. Limiting grooves are provided on the upper and lower sides of the movable slot, and a limiting slider that slides within the limiting grooves is provided on the support plate. The two sides of the support plate are outwardly convex arc surfaces.

[0013] Furthermore, the spiked part includes a receiving hole that penetrates the inner cylinder and the outer cylinder sidewall and is located below the expansion part, and a movable spike rod that is limited and slidable within the receiving hole. One end of the movable spike rod extends beyond the inner wall of the movable cavity and the end is hemispherical, while the other end of the movable spike rod is spike-shaped.

[0014] Furthermore, the self-tightening mechanism is also provided with a limiting component, which includes a through-frame block disposed on the inner cylinder and a limiting pin that is movably connected to the through-frame block. The limiting pin is provided with a limiting clamp that is adapted to the outer surface of the threaded rod.

[0015] A construction method for the above-mentioned prestressed self-adjusting anchored cable frame beam structure includes the following steps:

[0016] S1. Drill anchor cable holes on the slope and place anchor cables in the anchor cable holes, then fill with concrete;

[0017] S2. Construct the steel mesh frame for the main frame beam, with anchor cables located at the intersection of the horizontal and vertical beams of the steel mesh frame;

[0018] S3. Holes for placing the self-tightening mechanism are drilled on both sides of the cross-section of each group of transverse and longitudinal beams excluding the outer edge, and the holes on both sides of each cross-section are arranged in a centrally symmetrical manner with the cross-section as the center.

[0019] S4. Place the self-tightening mechanism in the buried hole and fill it with concrete;

[0020] S5. Fix the connecting steel cable to the anchor cable or the reinforcing bars around the anchor cable and keep the connecting steel cable taut, then erect the main formwork of the frame beam and pour the concrete.

[0021] S6. Pull out the limit pin bracket.

[0022] Compared with the prior art, the beneficial effects of this solution are: the present invention can provide additional anchoring points for the frame beam by installing self-tightening mechanisms on both sides of the transverse and longitudinal beams of the anchor cable frame beam. Thus, when the anchoring force of the main anchoring point of the frame beam decreases due to soil creep, the self-tightening mechanism can strengthen the anchoring force with the slope to maintain the installation stability of the frame beam. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure and installation of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the self-tightening mechanism in this invention;

[0026] Figure 3 This is a three-dimensional cross-sectional view of the self-tightening mechanism in this invention;

[0027] Figure 4 This is a three-dimensional schematic diagram of the outer cylinder in this invention;

[0028] Figure 5 This is a three-dimensional schematic diagram of the inner cylinder in this invention;

[0029] Figure 6 This is a three-dimensional schematic diagram of the limiting pin frame in this invention;

[0030] Figure 7 This is the present invention. Figure 1 Enlarged diagram of point A in the middle.

[0031] In the diagram: 1. Main frame beam; 11. Connecting steel cable; 12. Slope; 2. Inner cylinder; 21. Outer cylinder; 22. Drive rod; 23. Movable chamber; 24. Push head; 25. Threaded rod; 26. Wrap joint; 3. Movable slot; 31. Support plate; 32. Limiting slide; 33. Limiting slider; 4. Accommodation hole; 41. Movable spike; 5. Frame block; 51. Limiting pin frame; 52. Limiting clamp. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figure 1-7The diagram illustrates a prestressed self-adjusting anchor cable frame beam structure, comprising a frame beam body 1 and self-tightening mechanisms disposed on both sides of the intersection of the longitudinal and transverse beams of the frame beam body 1. The self-tightening mechanisms are fixed to the intersection of the longitudinal and transverse beams of the frame beam body 1 by connecting steel cables 11 disposed thereon. When the tension of the connecting steel cables 11 increases, the anchoring force of the self-tightening mechanism on the slope 12 increases. This scheme utilizes the self-tightening mechanism disposed around the intersection of the longitudinal and transverse beams of the frame beam, enabling it to provide additional anchoring points for the frame beam. At the same time, these anchoring points do not play a main support role; they only provide additional prestressed support for the frame beam when soil creep occurs at the anchoring points of the anchor cables, causing insufficient prestressing force of the frame beam and resulting in installation instability, thereby making the overall stability of the frame beam higher.

[0034] In one embodiment, the self-tightening mechanism includes a pile body and an expansion portion and a pile spike portion disposed on the pile body. The pile body is the main body of the self-tightening mechanism and is used to embed on both sides of the intersecting part of the longitudinal and transverse beams of the frame beam to achieve additional anchoring. The expansion portion is used to assist the initial installation stability of the pile body, while the pile spike portion is a structural part that provides the main prestress reinforcement when the prestress of the frame beam body 1 is insufficient. The pile body includes an inner cylinder 2, an outer cylinder 21 disposed outside the inner cylinder 2 and with a length less than the inner cylinder 2, and a drive rod 22 movably disposed inside the inner cylinder 2. The outer cylinder 21 has a different diameter and length than the inner cylinder 2, which makes its... There is a certain gap between the two, which is used for filling concrete after its installation. The inner cylinder 2 has a movable chamber 23. The drive rod 22 includes a push head 24 that moves in the movable chamber 23, a threaded rod 25 that is threaded to the inner cylinder 2, and a coiled joint 26 that is located at the end of the threaded rod 25 away from the push head 24 and connected to the connecting steel cable 11. The drive rod 22 is used to drive the expansion part and the pile spike to function. It rotates in the inner cylinder 2 through the threaded rod 25, which can ensure that the push head 24 at the lower end can move in and out of the movable chamber 23, thus serving as a structure to drive the expansion part and the pile spike.

[0035] The expansion section includes a movable slot 3 that runs through the side walls of the inner cylinder 2 and the outer cylinder 21, and a support plate 31 that slides within the movable slot 3. Limiting grooves 32 are provided on the upper and lower sides of the movable slot 3. A limiting slider 33 that slides within the limiting grooves 32 is provided on the support plate 31. The two sides of the support plate 31 are outwardly convex arc surfaces. When the push head 24 moves downward in the movable chamber 23, it will push against the inner arc surface of the support plate 31, thereby causing the support plate 31 to move outward. This allows the outer arc surface of the support plate 31 to abut and fasten against the inner wall of the hole where the self-tightening mechanism is embedded, so that the entire mechanism is initially stabilized in the hole, which facilitates the subsequent filling of concrete.

[0036] The pile spike includes a receiving hole 4 that penetrates the side walls of the inner cylinder 2 and the outer cylinder 21 and is located below the expansion section, and a movable spike 41 that is limited and slidable within the receiving hole 4. One end of the movable spike 41 extends beyond the inner wall of the movable chamber 23 and is hemispherical, while the other end of the movable spike 41 is spike-shaped. The drive of the pile spike is controlled by the change in the anchorage prestress of the frame beam body 1. When the prestress of the frame beam decreases, causing the frame beam body 1 to tend to deviate, it will pull the rotating joint 26 through the connecting steel cable 11, thereby causing the push head 24 to move downward and abut against the movable spike 41. The movable spike 41 then extends deep from the receiving hole 4 and penetrates into the soil, thereby forming a pile spike on the outer surface of the pile body to improve anchorage, thereby enhancing the prestress and achieving an auxiliary stabilizing effect on the frame beam.

[0037] In one embodiment, the self-tightening mechanism is further provided with a limiting component, which includes a through-frame block 5 disposed on the inner cylinder 2 and a limiting pin 51 movably connected to the through-frame block 5. The limiting pin 51 is provided with a limiting clamp 52 adapted to the outer surface of the threaded rod 25. Since the self-tightening mechanism needs to be driven to stabilize it initially after being placed into the buried hole, this stabilization is achieved by rotating the winding joint 26 to make the push head 24 move downward in the movable chamber 23 to abut against the support plate 31. After the push head 24 moves downward to a certain extent, the support plate 31 is completely pushed out. When it moves downward again, it will trigger the pile spike. In order to avoid the pile spike being triggered in the normal state, the limiting pin 51 is used to limit the bottom surface of the winding joint 26, so that after it rotates downward to a certain position, it is supported by the limiting pin 51, so that it cannot move downward again, which makes it easier for the installer to control the overall installation effect.

[0038] The construction method for the prestressed self-adjusting anchored cable frame beam structure in this scheme includes the following steps:

[0039] First, anchor cable holes are drilled on slope 12, and anchor cables are placed in the holes before concrete is filled. Next, the steel mesh frame of the main frame beam 1 is constructed. The anchor cables are located at the intersection of the horizontal and vertical beams of the steel mesh frame and extend outwards. Then, holes for placing self-tightening mechanisms are drilled on both sides of each group of horizontal and vertical beam intersections (excluding the outer edges). The holes on both sides of each group of intersections are arranged symmetrically around the intersection, so that the self-tightening mechanism can reinforce the anchorage when the frame beam moves in any direction. Then, the hub joint 26 is rotated, causing the push head 24 to abut against the support plate 31 and open. The support plate 31 initially stabilizes the inner wall of the holes. After stabilization, the limit position is then set. The pin 51 is removed, releasing the rotation limit on the wrapping joint 26. When the self-tightening mechanism is placed in the buried hole, the end of the inner cylinder 2 needs to be kept above the buried hole at a certain height to prevent concrete from covering the rotating part between the threaded rod 25 and the inner cylinder 2, causing the drive rod 22 to be unable to rotate. The height difference between the outer cylinder 21 and the inner cylinder 2 creates a certain space with the buried hole. This space is used to fill the concrete. After the concrete is filled, the connecting steel cable 11 is wrapped around the wrapping joint 26 several times, and then connected and fixed to the steel mesh or anchor cable, keeping the connecting steel cable 11 in a taut state. Finally, the formwork of the frame beam body 1 is erected and the integrated pouring is completed.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A prestressed self-adjusting anchor cable frame beam structure, comprising a frame beam body (1), characterized in that: It also includes a self-tightening mechanism set on both sides of the intersection of the longitudinal beams and transverse beams of the main body of the frame beam (1); The self-tightening mechanism is fixed to the longitudinal and transverse beams of the frame beam body (1) by the connecting steel cable (11) set thereon. When the tension of the connecting steel cable (11) increases, the anchoring force of the self-tightening mechanism on the slope (12) increases. The self-tightening mechanism includes a pile body and an expansion part and a pile spike provided on the pile body; The pile body includes an inner cylinder (2), an outer cylinder (21) located outside the inner cylinder (2) and having a length less than that of the inner cylinder (2), and a drive rod (22) movably located inside the inner cylinder (2). The inner cylinder (2) has a movable chamber (23) inside. The drive rod (22) includes a push head (24) that moves in the movable chamber (23), a threaded rod (25) that is threaded to the inner cylinder (2), and a winding head (26) that is located at the end of the threaded rod (25) away from the push head (24) and connected to the connecting steel cable (11). The spiked part includes a receiving hole (4) that passes through the side wall of the inner cylinder (2) and the outer cylinder (21) and is located below the expansion part, and a movable spike rod (41) that is limited and slids within the receiving hole (4). One end of the movable spike rod (41) extends beyond the inner wall of the movable chamber (23) and the end is hemispherical. The other end of the movable spike rod (41) is spike-shaped.

2. The prestressed self-adjusting anchor cable frame beam structure according to claim 1, characterized in that: The expansion section includes a movable slot (3) that passes through the side walls of the inner cylinder (2) and the outer cylinder (21) and a support plate (31) that slides within the movable slot (3). The movable slot (3) has a limiting groove (32) on its upper and lower sides. The support plate (31) is provided with a limiting slider (33) that slides within the limiting groove (32). The two sides of the support plate (31) are outwardly convex arc surfaces.

3. The prestressed self-adjusting anchor cable frame beam structure according to claim 1, characterized in that: The self-tightening mechanism is also provided with a limiting component, which includes a through-frame block (5) provided on the inner cylinder (2) and a limiting pin (51) that is movably connected to the through-frame block (5). The limiting pin (51) is provided with a limiting clamp (52) that is adapted to the outer surface of the threaded rod (25).

4. A construction method for the prestressed self-adjusting anchored cable frame beam structure of claim 3, characterized in that, Includes the following steps: S1. Drill anchor holes on the slope (12) and place anchor cables in the anchor holes and then fill with concrete; S2. Construct the steel mesh frame of the main body of the frame beam (1), with the anchor cable located at the intersection of the horizontal and vertical beams of the steel mesh frame; S3. Holes for placing the self-tightening mechanism are drilled on both sides of the cross-section of each group of transverse and longitudinal beams excluding the outer edge, and the holes on both sides of each cross-section are arranged in a centrally symmetrical manner with the cross-section as the center. S4. Place the self-tightening mechanism in the buried hole and fill it with concrete; S5. Fix the connecting steel cable (11) to the anchor cable or the reinforcing bars around the anchor cable and keep the connecting steel cable (11) in a taut state, then erect the formwork of the frame beam (1) and pour concrete. S6. Pull out the limit pin bracket (51).

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