Stay cable anchoring device and method

Abstract

The invention relates to the technical field of stayed-cable bridges, and discloses a stayed-cable anchoring device and an anchoring method.The stayed-cable anchoring device comprises a support, and a rod-shaped body is installed in the support; the monitoring assembly can monitor the straightness deviation of the stay cable; the adjusting assembly comprises a moving part and a driving part; a containing space is formed in the moving part, the left side and the right side of the moving part are slidably arranged on the rod-shaped body in a sleeving mode, and part of the rod-shaped body and the anchorage device are located in the containing space; the moving part can drive the anchorage device to move so that the deviated stay cable can be reset. The controller is electrically connected with the monitoring assembly and the driving part; when the straightness deviation monitored by the monitoring assembly is larger than a preset value, the controller controls the driving part to be started. The deviated stay cable is driven to reset through the adjusting assembly, and the problem that due to the fact that the position of the stay cable is changed, stress concentration occurs in part of the positions of the main beam and the bridge tower, and consequently the bearing capacity of the stay cable and the overall stability of the bridge are affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable-stayed bridges, and particularly relates to a cable-stayed cable anchoring device and an anchoring method. Background Art

[0002] Cable-stayed cable anchoring is an important part of the cable-stayed bridge structure, which is a structure that transfers the tension of the cable-stayed cable to the bridge pier or bridge tower. Since the cable-stayed cable anchoring structure needs to bear the concentrated force of the cable-stayed cable and transfer it to the main girder or tower wall, its design and construction quality will directly affect the safety and stability of the bridge.

[0003] In the prior art, the commonly used cable-stayed cable anchoring structure is to pre-cast a steel bar fixing plate inside the concrete. Two ear plates protruding from the concrete are fixed on the steel bar fixing plate. An articulated shaft or a steel pipe is fixed between the two ear plates protruding from the concrete. Then, using the anchor of the cable-stayed cable end, the end of the cable-stayed cable is set on the articulated shaft or the steel pipe.

[0004] However, when the bridge is affected by vibration and wind force, the position of the cable-stayed cable will shift. The inclined cable-stayed cable will cause the internal force distribution of the main girder and the bridge tower to change, resulting in stress concentration at some positions of the main girder and the bridge tower, thus leading to the problem of uneven cable force distribution, affecting the bearing capacity of the cable-stayed cable and the overall stability of the bridge. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a cable-stayed cable anchoring device and an anchoring method.

[0006] In a first aspect, the present invention provides a cable-stayed cable anchoring device, including: a support, the bottom of which is buried in the concrete, and a rod-shaped body capable of sleeving the anchor of the cable-stayed cable end is installed inside the support; a monitoring component capable of monitoring the straightness deviation of the cable-stayed cable; an adjusting component including a moving member capable of moving along the rod-shaped body and a driving member capable of driving the moving member to move; the moving member has an accommodation space, and the left and right sides of the moving member are slidably sleeved on the rod-shaped body, and part of the rod-shaped body and the anchor are both located in the accommodation space; the moving member can drive the anchor to move so as to reset the offset cable-stayed cable; a controller, electrically connected to the monitoring component and the driving member respectively; when the straightness deviation monitored by the monitoring component is greater than a preset value, the controller controls the driving member to start.

[0007] Optionally, the monitoring component includes a hinge seat arranged on the support, a hinge shaft is arranged inside the hinge seat, and a monitor capable of monitoring the straightness deviation of the cable-stayed cable is installed on the hinge shaft; a locking component capable of locking the hinge shaft is installed on the hinge seat.

[0008] Optionally, the locking assembly includes a gear mounted on the hinge shaft, a tooth block meshed below the gear, and a slide bar connected below the tooth block; a slide hole is vertically formed in the hinge seat, and the slide bar is slidably arranged in the slide hole; a spring is sleeved outside the slide bar, and two ends of the spring are respectively connected to the tooth block and the hinge seat.

[0009] By providing the locking assembly, when the monitor is adjusted, the hinge shaft is locked by the locking assembly to prevent the hinge shaft from rotating and affecting the monitoring of the monitor.

[0010] Optionally, the monitor is a straightness measuring instrument, and the straightness measuring instrument is electrically connected to the controller.

[0011] Optionally, the driving member includes a motor and a threaded rod mounted on the output shaft of the motor, and one end of the threaded rod passes through the support and is threadedly connected to the moving member.

[0012] Optionally, the moving member is U-shaped and includes two first side plates located on the left and right sides and a first bottom plate connected between the two first side plates. Openings are respectively formed in the two first side plates, and the moving member is slidably sleeved on the rod-shaped body through the two openings.

[0013] Optionally, on the part of the rod-shaped body located inside the support, FRP cloth capable of shock absorption is wound, and the anchor of the end of the stay cable is sleeved outside the FRP cloth.

[0014] By winding the FRP cloth on the rod-shaped body, the bearing capacity of the rod-shaped body can be enhanced, the deformation capacity of the rod-shaped body can be improved, and at the same time, the FRP cloth can also absorb energy and play a role in shock absorption.

[0015] Optionally, the support includes a bottom plate buried in the concrete and a U-shaped seat; the U-shaped seat includes two second side plates located on the left and right sides and a second bottom plate connected between the two second side plates. The second bottom plate is installed on the bottom plate, openings are respectively formed in the two second side plates, and two ends of the rod-shaped body are respectively inserted into the corresponding openings.

[0016] Optionally, the rod-shaped body is a bolt, one end of the bolt far from its head passes through the two openings and extends out of the support, and a nut is threadedly connected to the end of the bolt far from its head.

[0017] In a second aspect, the present invention provides an anchoring method for a stay cable anchoring device, including:

[0018] Pre-cast the bottom of the support in the concrete;

[0019] Set the anchor of the end of the stay cable on the rod-shaped body;

[0020] Adjust the monitoring component, and monitor the straightness deviation of the stay cable in real time through the monitoring component; when the straightness deviation of the stay cable is greater than a preset value, the controller controls the driving member to start to reset the offset stay cable.

[0021] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0022] By providing a stay cable anchoring device for sleeving an anchor for the end of the stay cable; by providing a monitoring component for real-time monitoring of the straightness of the stay cable; by providing an adjusting component for driving the offset stay cable to reset; by providing a controller for receiving the straightness state data of the stay cable monitored in real time by the monitoring component, when the deviation of the straightness of the stay cable is greater than a preset value, the controller starts the adjusting component to reset the offset stay cable. Therefore, the stay cable anchoring device of the present invention corrects the offset stay cable to avoid the problem of stress concentration at some positions of the main beam and the bridge tower caused by the change in the position of the stay cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a stay cable anchoring device provided by an embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the monitoring component installed on the support provided by an embodiment of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the monitoring component provided by an embodiment of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the FRP cloth wound around the rod-shaped body provided by an embodiment of the present invention.

[0027] Description of the reference numerals:

[0028] 1, bottom plate; 2, support; 3, rod-shaped body; 4, FRP cloth; 5, monitoring component; 501, hinge seat; 502, hinge shaft; 503, gear; 504, monitor; 505, spring; 506, tooth block; 6, adjusting component; 601, motor; 602, threaded rod; 603, driving member; 604, guide rod; 7, controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following combines the drawings to describe in detail a specific embodiment of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] Embodiment 1:

[0032] As Figure 1 and Figure 2 As shown, a stay cable anchoring device includes: a support 2, the bottom of which is buried in concrete, and a rod-shaped body 3 capable of sleeving an anchor for the end of the stay cable is installed in the support 2; a monitoring component 5 capable of monitoring the straightness deviation of the stay cable; an adjusting component 6 including a moving member 603 capable of moving along the rod-shaped body 3 and a driving member capable of driving the moving member 603 to move; a receiving space is provided in the moving member 603, the anchor is located in the receiving space, and the left and right sides of the moving member 603 are slidably sleeved on the rod-shaped body 3; the moving member 603 can drive the anchor to move so as to reset the offset stay cable; a controller 7 is electrically connected to the monitoring component 5 and the driving member respectively; when the straightness deviation monitored by the monitoring component 5 is greater than a preset value, the controller controls the driving member to start.

[0033] The monitoring component 5 includes a hinge seat 501 provided on the support 2, a hinge shaft 502 is provided in the hinge seat 501, and a monitor 504 capable of monitoring the straightness deviation of the stay cable is installed on the hinge shaft 502; a locking component capable of locking the hinge shaft 502 is installed on the hinge seat 501.

[0034] In this embodiment, the hinge seat 501 includes two fixing plates both connected to the support 2. The two fixing plates are parallel to each other and are located on the left and right sides outside the support 2. The two ends of the hinge shaft 501 are respectively rotatably connected to the two fixing plates, and the hinge shaft 501 is parallel to the rod-shaped body 3.

[0035] The locking component includes a gear 503 installed on the hinge shaft 502. A tooth block 506 is engaged below the gear 503, and a sliding rod is connected below the tooth block 506; a sliding hole is vertically formed on the hinge seat 501, and the sliding rod is slidably disposed in the sliding hole; a spring 505 is sleeved outside the sliding rod, and the two ends of the spring 505 are respectively connected to the tooth block 506 and the hinge seat 501.

[0036] As Figure 3As shown, in this embodiment, cross plates are connected to one side of each of the two fixed plates close to each other. A sliding hole is vertically formed in the cross plate. A sliding rod is vertically inserted into the sliding hole. A spring is vertically arranged between the toothed block and the cross plate. The toothed block is crescent-shaped as a whole.

[0037] The monitor 504 is a straightness measuring instrument, and the straightness measuring instrument is electrically connected to the controller 7.

[0038] The driving member includes a motor 601 and a threaded rod 602 mounted on the output shaft of the motor 601. One end of the threaded rod 602 passes through the support 2 and is threadedly connected to the moving member 603.

[0039] In this embodiment, a threaded hole capable of being threadedly connected to the threaded rod 602 is formed in the moving member 603, and a through hole for passing the threaded rod is formed in the support 2.

[0040] The moving member 603 is U-shaped and includes two side plates one on the left and right sides and a bottom plate one connected between the two side plates one. Through holes one are respectively formed in the two side plates one, and the moving member 603 is slidably sleeved on the rod-shaped body 3 through the two through holes one.

[0041] In this embodiment, a guide rod 604 parallel to the rod-shaped body 3 and capable of sliding along the length direction of the rod-shaped body 3 is arranged in the support 2. The guide rod 604 is connected to the moving member 603. The two ends of the guide rod 604 are respectively slidably connected to the two side plates two of the support 2, and sliding holes for the guide rod 604 to slide are formed in the two side plates two of the support 2.

[0042] As Figure 4 shown, on the part of the rod-shaped body 3 located in the support 2, an FRP cloth 4 capable of damping is wound, and the anchor of the stay cable end is sleeved outside the FRP cloth 4.

[0043] The support 2 includes a bottom plate 1 embedded in the concrete and a U-shaped seat; the U-shaped seat includes two side plates two on the left and right sides and a bottom plate two connected between the two side plates two. The bottom plate two is mounted on the bottom plate 1. Through holes two are respectively formed in the two side plates two, and the two ends of the rod-shaped body 3 are respectively inserted into the corresponding through holes two.

[0044] The rod-shaped body 3 is a bolt. One end of the bolt far from its head passes through the two through holes two and extends out of the support 2, and a nut is threadedly connected to the end of the bolt far from its head.

[0045] Embodiment Two:

[0046] This embodiment provides an anchoring method for a stay cable anchoring device, including:

[0047] Step One: Pour the bottom of the support 2 into the concrete in advance;

[0048] In this embodiment, the base plate 1 at the bottom of the support 2 is pre-cast in the concrete;

[0049] Step 2: Sleeve the anchor at the end of the stay cable on the rod-shaped body 3;

[0050] In this embodiment, before sleeving the anchor, the FRP cloth 4 is first wound around a part of the rod-shaped body 3 located inside the support 2;

[0051] Step 3: Adjust the monitoring component (5), and monitor the straightness deviation of the stay cable in real time through the monitoring component (5); when the straightness deviation of the stay cable is greater than the preset value, the controller controls the driving member to start, so that the offset stay cable is reset.

[0052] In this embodiment, by adjusting the inclination angle of the monitor 504, the straightness deviation of the stay cable is monitored in real time through the monitor 504.

[0053] Working principle of the locking component:

[0054] When adjusting the inclination angle of the monitor 504, the gear 503 rotates with the hinge shaft 502. Although the tooth block 506 meshes with the gear 503, the tooth block 506 cannot rotate. The gear 503 acts on the tooth block 506, causing the tooth block 506 and the slide rod to move downward along the slide hole. At this time, the spring 505 is in a compressed state; when the inclination angle adjustment is completed, the compressed spring 505 resets, springing up the tooth block 506 and the slide rod upward, making the tooth block 506 mesh with the gear 503, and locking the hinge shaft (when adjusting the inclination angle, the spring 505 will compress and extend reciprocally, and at this time, the impact sound of the gear and the tooth block can be heard).

[0055] In this embodiment, by adjusting the monitoring direction of the monitor 504 to be parallel to the length direction of the stay cable after installation, the monitor 504 can monitor the magnitude and direction of the straightness deviation of the stay cable in real time. When it is detected that the stay cable has an angular deviation, the controller 7 drives the adjustment component 6 to perform a deviation correction operation on the stay cable, so that the straightness of the stay cable is restored to the allowable range.

[0056] The above are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A stay cable anchoring device, characterized in that: include: A support (2) has its bottom buried in concrete, and a rod-shaped body (3) capable of being sleeved with an anchor at the end of a stay cable is installed in the support (2); A monitoring component (5) capable of monitoring straightness deviation of the inclined cable; The adjusting component (6) comprises a moving part (603) capable of moving along the rod-shaped body (3), and a driving part capable of driving the moving part (603) to move; the moving part (603) has a receiving space inside, and both left and right sides of the moving part (603) can be slidably mounted on the rod-shaped body (3), and part of the rod-shaped body (3) and the anchor are both located in the receiving space; the moving part (603) can drive the anchor to move, so as to reset the offset inclined cable; The controller (7) is electrically connected to the monitoring component (5) and the driving component respectively; when the straightness deviation monitored by the monitoring component (5) is greater than a preset value, the controller controls the driving component to start.

2. The stay cable anchoring device according to claim 1, characterized in that: The monitoring assembly (5) comprises an articulated seat (501) arranged on the support (2), an articulated shaft (502) being arranged in the articulated seat (501), a monitor (504) capable of monitoring the straightness deviation of the inclined cable being installed on the articulated shaft (502); and a locking assembly capable of locking the articulated shaft (502) being installed on the articulated seat (501).

3. The stay cable anchoring device according to claim 2, characterized in that: The locking assembly comprises a gear (503) mounted on the hinge shaft (502), a tooth block (506) meshing below the gear (503), and a slide rod connected below the tooth block (506); a slide hole is provided on the hinge seat (501) in the vertical direction, and the slide rod is slidably arranged in the slide hole; a spring (505) is provided on the outer sleeve of the slide rod, and two ends of the spring (505) are respectively connected to the tooth block (506) and the hinge seat (501).

4. The stay cable anchoring device according to claim 2, characterized in that: The monitor (504) is a straightness measuring instrument, and the straightness measuring instrument is electrically connected to the controller (7).

5. The stay cable anchoring device according to claim 1, characterized in that: The driving member comprises a motor (601) and a threaded rod (602) mounted on the output shaft of the motor (601), one end of the threaded rod (602) passes through the support (2) and is threadedly connected to the moving member (603).

6. The stay cable anchoring device according to claim 1, characterized in that: The movable member (603) is U-shaped, comprising two side plates (1) located on the left and right sides, and a bottom plate (1) connected between the two side plates (1), and the two side plates (1) are respectively provided with openings (1), and the movable member (603) is slidably mounted on the rod-shaped body (3) through the two openings (1).

7. The stay cable anchoring device according to claim 1, characterized in that: The rod-shaped body (3) is located on the part inside the support (2), and is wrapped with a shock-absorbing FRP cloth (4), and the anchor at the end of the inclined cable is sleeved outside the FRP cloth (4).

8. The stay cable anchoring device according to claim 1, characterized in that: The support (2) comprises a bottom plate (1) buried in concrete, and a U-shaped seat; The U-shaped seat comprises two side panels (2) located on the left and right sides, and a bottom panel (2) connected between the two side panels (2), the bottom panel (2) being mounted on the bottom panel (1), the two side panels (2) being respectively provided with two openings, and the two ends of the rod-shaped body (3) being respectively inserted into the corresponding two openings.

9. The stay cable anchoring device according to claim 8, characterized in that: The rod-shaped body (3) is a bolt, one end of the bolt away from the head passes through two openings and extends out of the support (2), and the other end of the bolt away from the head is threadedly connected with a nut.

10. The anchoring method of the stay cable anchoring device according to any one of claims 1 to 9, characterized in that: include: Pre-casting the bottom of the support (2) in concrete; The anchor at the end of the inclined cable is sleeved on the rod-shaped body (3); The monitoring component (5) is adjusted to monitor the straightness deviation of the inclined cable in real time through the monitoring component (5); when the straightness deviation of the inclined cable is greater than a preset value, the controller controls the driving component to start, so as to reset the offset inclined cable.

Images