A buckle point device for arch bridge cable-stayed buckle hanging construction

Abstract

The utility model relates to bridge engineering technical field, especially a kind of buckling point device of arch bridge cable-stayed buckling construction, including steering structure and several connecting structures, steering structure and several connecting structures are connected by first pin shaft, further include at least two anchor heads, anchor head quantity is consistent with the number of connecting structure, each anchor head includes a first lug, two second lug and an anchor plate, the first lug of same anchor head is connected with connecting structure in one end, and other end is connected with two second lug, anchor plate is vertically fixed between two second lug, first through-hole for installing buckling cable is equipped on anchor plate. Through anchor head separation type design, several buckling cables can be connected with buckling cable saddle at different sides or different heights of same tower, maximum limit uses the vertical freedom degree provided by the rotary connection between first lug and connecting structure, while reducing the installation weight of single buckling cable, reduces the bearing requirement to hoist work cable.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a fastening point device for the construction of cable-stayed arch bridges. Background Technology

[0002] In my country, the construction scale of small and medium-span bridges continues to expand, becoming an indispensable and important component of road network construction. Among them, arch bridges, with their unique structural advantages, significant economic benefits, and excellent durability, have become an indispensable part of road network construction.

[0003] The cable-stayed bridge method is widely used in arch bridge construction due to its significant advantages, including reasonable structural stress distribution, convenient and efficient construction, strong adaptability, and good economy. During cable-stayed bridge construction, high-strength anchor plates are first pre-embedded at the arch rib segments. Then, cable saddles, steering devices, and other equipment are installed on the tower. During construction, the connecting pins are hoisted to the arch rib anchor plates and connected to the arch rib via pin shafts. Simultaneously, the cable connecting points are turned via the tower cable saddles and temporarily anchored at the tensioning end. After a complete force transmission system is formed, tensioning is performed at the ground anchors, and the arch rib alignment is adjusted by controlling the cable tension.

[0004] As a key force-transmitting component in the cable-stayed suspension construction method, the performance of the fastening point directly determines the safety and accuracy of the construction. Currently, the fastening point structure used in construction is simple and effective, but it has certain limitations. For example... Figure 1 As shown, in a traditional snap-fit ​​structure, the two connecting structures 2 are connected to an anchor head 1 via a first pin 4. The multiple bundles of snap-fit ​​cables connected to the anchor head 1 can only be connected to the same tower saddle. This makes it difficult to use the working cable for overall snap-fit ​​cable traction during installation, and the excessively dense arrangement of the snap-fit ​​cables makes them prone to tangling during tensioning, thus affecting construction efficiency. Furthermore, connecting multiple bundles of snap-fit ​​cables to the same saddle results in excessively large vertical concentrated loads, increasing the load-bearing capacity requirements of the saddle platform and increasing the amount of steel used in the tower. Simultaneously, it fails to effectively utilize the tower's spatial position and cannot fully leverage the tower's overall load-bearing capacity. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the large installation weight of the cable and the fact that multiple cable bundles can only be connected to the same tower cable saddle, and to provide a fastening point device for the construction of cable-stayed arch bridges.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fastening device for cable-stayed arch bridge construction includes a steering structure and several connecting structures. The steering structure and several connecting structures are connected by a first pin. It also includes at least two anchor heads, the number of which is the same as the number of connecting structures. Each anchor head includes a first ear plate, two second ear plates, and an anchor plate. One end of the first ear plate of the same anchor head is connected to the connecting structure, and the other end is connected to the two second ear plates. The anchor plate is vertically fixed between the two second ear plates. The anchor plate is provided with a first through hole for installing the fastening cable.

[0007] There is no lateral connection between the anchor heads.

[0008] The anchor head is provided with a first ear plate and a second ear plate, so that the anchor head at the tail end forms a whole. The anchor plate is vertically fixed between the two second ear plates to connect the two second ear plates and improve the load-bearing capacity of the anchor head at the stress point. There is no lateral connection between the anchor heads. This solution adopts a split anchor head design, which divides the single bundle of cable originally connected to the fastening device into multiple bundles of cable. The multiple bundles of cable can be connected to the cable saddles on different sides or at different heights of the same tower, which maximizes the vertical freedom provided by the rotational connection between the first ear plate and the second ear plate and the connecting structure, while reducing the installation weight of the single bundle of cable, thereby reducing the load-bearing requirements of the hoisting working cable.

[0009] Preferably, the anchor plate is arranged in a matrix with a plurality of the first through holes. The first through holes are arranged both horizontally and vertically.

[0010] By employing this technical solution, the arrangement of multiple through holes in a matrix allows the tension of the buckle to be evenly distributed to different areas of the anchor plate, avoiding localized stress concentration, improving the structural stability and fatigue resistance of the anchor plate, and preventing deformation or damage to the anchor plate due to excessive stress at a single point.

[0011] Preferably, the number of the first through holes in the anchor plate is equal in both the horizontal and vertical directions.

[0012] By adopting this technical solution, the number of first through holes in the horizontal and vertical directions is equal, which can make the layout of the buckle on the anchor plate symmetrically distributed, ensuring that the tension of the buckle is uniformly balanced in the horizontal and vertical directions, avoiding deformation such as eccentric load and torsion of the anchor plate due to asymmetrical force, and improving the stability of the overall structure.

[0013] Preferably, the anchor plate is provided with a plurality of anchors for fixing the buckle on the side near the first ear plate, and the number of anchors is equal to the number of through holes.

[0014] This technical solution achieves a one-to-one stable anchoring, which helps prevent the sling from loosening or slipping.

[0015] Preferably, a plurality of vertical stiffening plates are provided between the through holes, and the vertical stiffening plates are perpendicular to the two second ear plates.

[0016] Using this technical solution, when the buckle passes through the first through hole, it will generate concentrated tension around the hole. If multiple first through holes are connected only by the anchor plate itself, stress concentration in the area between the holes is likely to occur. The vertical stiffening plate is equivalent to building a force support between the first through holes, which can transfer the local tension of a single first through hole to the surrounding area and the second ear plate, dispersing the concentrated stress to a larger area of ​​the structure, preventing the anchor plate from cracking or deforming due to excessive stress between the holes, and extending the service life of the anchor plate.

[0017] Preferably, a second through hole is provided at the end of the first ear plate that is connected to the connecting structure for the first pin to pass through.

[0018] In this technical solution, the first ear plate and the connecting structure are connected by the first pin, providing rotational freedom.

[0019] Preferably, the second through hole is an elliptical through hole.

[0020] Preferably, the edge of the first ear plate is provided with a lifting lug.

[0021] This technical solution helps to clearly define the lifting and connection functions, thereby improving construction safety and operational flexibility.

[0022] Preferably, the surface of the second ear plate is configured in the shape of arrow feathers.

[0023] This technical solution facilitates smoother load transfer and reduces the risk of stress concentration in the fastening device.

[0024] Preferably, the connection between the first ear plate and the two second ear plates and the connection between the two second ear plates and the anchor plate are both welded.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a fastening point device for the construction of cable-stayed arch bridges. This solution adopts a separate anchor head design, which divides the single bundle of fastening cables originally connected to the fastening point device into two bundles of fastening cables. The two bundles of fastening cables can be connected to the fastening cable saddles on different sides or at different heights of the same tower. This maximizes the vertical freedom provided by the rotational connection between the first ear plate and the second ear plate and the connecting structure, while reducing the installation weight of the single bundle of fastening cables, thereby reducing the load requirements on the hoisting working cables. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a traditional snap-in point. Figure 2 A schematic diagram of the fastening point device for the cable-stayed construction of an arch bridge; Figure 3 An elevation view of the fastening point device for the cable-stayed construction of an arch bridge; Figure 4 This is a schematic diagram of the anchor head structure; Figure 5 This is a schematic diagram of the steering structure; Figure 6 This is a schematic diagram of the connection structure; Figure 7 A schematic diagram of the plan structure of the cable-stayed anchorage connection system for an arch bridge; Figure 8 A schematic diagram of the elevation structure of the cable-stayed anchorage connection system for an arch bridge. Figure 9 A schematic diagram of the tower structure for the arch rib hoisting construction; Figure 10 This is a schematic diagram of the overall connection when using a tie-point hoisting method for arch bridge cable-stayed construction.

[0027] Marked in the image: 1-Anchor head, 2-Connecting structure, 3-Steering structure, 4-First pin, 5-Cable saddle, 6-Second pin, 7-Cable, 8-Distribution beam, 9-Anchor plate, 10-Arch rib, 11-Tie bolt, 12-Steering joint lug, 13-Ground anchor, 101-First lug, 102-Second lug, 103-Anchor plate, 104-Stiffening plate, 105-Second through hole, 106-Lifting lug, 107-Anchor, 108-First through hole, 201-Connecting plate. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0031] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0032] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0033] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0034] Example 1 like Figure 2-6 As shown, a fastening device for the construction of an arch bridge cable-stayed structure includes a steering structure 3 and several connecting structures 2. The steering structure 3 and several connecting structures 2 are connected by a first pin 4. It also includes at least two anchor heads 1, the number of which is the same as the number of connecting structures 2. Each anchor head 1 includes a first ear plate 101, two second ear plates 102 and an anchor plate 103. One end of the first ear plate 101 of the same anchor head 1 is connected to the connecting structure 2, and the other end is connected to the two second ear plates 102. The anchor plate 103 is vertically fixed between the two second ear plates 102. The anchor plate 103 is provided with a first through hole 108 for installing a fastening cable 7.

[0035] The connection structure 2 consists of two connecting plates 201 connected by four tie bolts 11.

[0036] Specifically, unlike traditional fastening points, the fastening point described in this solution divides the anchor plate 103 into two, resulting in two anchor heads 1. Each anchor head 1 includes a first ear plate 101, two second ear plates 102 (upper and lower), and the anchor plate 103. There is no lateral connection between the two anchor heads 1 of the fastening point; the connection is solely through the anchor plate 103 to improve the load-bearing capacity of the component at stress points. The improved anchor head 1 divides the single bundle of fastening cable 7 originally connected to the fastening point into two bundles of fastening cable 7. The two bundles of fastening cable 7 can be connected to fastening cable saddles 5 on different sides or at different heights of the same tower, maximizing the vertical freedom provided by the rotational connection between the first ear plate 101 and the second ear plate 102 and the connecting structure 2, while reducing the installation weight of a single bundle of fastening cable 7, thereby reducing the load-bearing requirements on the hoisting working cable.

[0037] The steering structure 3 can connect to multiple connecting structures 2, and one connecting structure 2 connects to one anchor head 1. Compared with the prior art, the anchor head 1 is provided with two second ear plates 102, and the second ear plates 102 are perpendicular to the first ear plate 101.

[0038] Two second ear plates 102 are welded to the same end of the first ear plate 101. The other end of the first ear plate 101 is connected to the connecting structure 2 by a hole and pin. Four tie bolts 11 are provided on the connecting structure 2 to achieve balanced force distribution, improve overall rigidity and stability, and ensure installation accuracy. The tie bolts 11 are ordinary tie bolts, or they can be three-section tie bolts, water-stop tie bolts, turnbuckle tie bolts, and other types of tie bolts. The steering structure 3 is provided with corresponding through holes for pin connection with the distribution beam 8. This connection method reduces the difficulty of installation and disassembly, and provides a lateral degree of freedom, which facilitates hoisting and transportation during construction. The steering structure 3 is welded with corresponding ear plates, which are connected to the intermediate connecting structure 2 by pin to form a whole. This connection method provides two vertical degrees of freedom, reduces the difficulty of installation between components during hoisting, and improves the prefabrication degree and reusability of the entire cable anchoring system.

[0039] The arch bridge cable anchorage connection system used in this embodiment is as follows: Figure 7 and Figure 8 As shown, the arch bridge cable anchoring connection system adopts a step-by-step connection of arch rib 10, anchor plate 9, distribution beam 8, and fastening point device. First, the anchor plate 9 is welded at the designed position of the arch rib 10. The anchor plate 9 is designed with corresponding through holes so that it can be connected to the distribution beam 8 through the second pin 6. The purpose of setting the distribution beam 8 is to increase the anchoring points of the fastening point device. By increasing the fastening point device, the number of corresponding fastening cables 7 when hoisting the arch rib 10 is increased, the tension of a single fastening cable 7 is reduced, thereby improving the safety of the fastening cable 7. The distribution beam 8 is also connected to the fastening point device through through holes and pins. A single distribution beam 8 can be connected to four fastening point devices simultaneously.

[0040] The number of anchor plates 103 and anchor heads 1 is the same. The anchor plate 103 is divided into two, with a total of two anchor heads 1, or the anchor plate 103 is divided into three, with a total of three anchor heads 1, or when the number of anchor plates 103 is other than that of anchor plates 103, the number of anchor heads 1 is the same as the number of anchor plates 103.

[0041] In an optional embodiment, the anchor plate 103 is provided with a plurality of first through holes 108 arranged in a matrix. The matrix arrangement of the plurality of first through holes 108 can evenly distribute the tension of the buckle 7 to different areas of the anchor plate 103, avoid local stress concentration, improve the structural stability and fatigue resistance of the anchor plate 103, and prevent the anchor plate 103 from deforming or being damaged due to excessive stress at a single point.

[0042] In an optional embodiment, the number of the first through holes 108 in the horizontal and vertical directions of the anchor plate 103 is equal. Having an equal number of the first through holes 108 in both the horizontal and vertical directions allows the buckles 7 to be symmetrically distributed on the anchor plate 103, ensuring that the tension of the buckles 7 is uniformly balanced in the horizontal and vertical directions. This prevents the anchor plate 103 from deforming due to asymmetrical force distribution, such as uneven loading or torsion, and improves the overall structural stability.

[0043] In an optional embodiment, the anchor plate 103 is provided with a plurality of anchors 107 for fixing the buckle 7 on the side near the first ear plate 101. The number of anchors 107 is equal to the number of through holes, so as to achieve one-to-one stable anchoring and help prevent the buckle 7 from loosening and slipping.

[0044] The anchor 107 is a nut-type anchor, or it can be a wedge-type anchor, a sleeve-type anchor, or other types of anchors.

[0045] In an optional embodiment, a plurality of vertical stiffening plates 104 are provided between the first through holes 108, and the vertical stiffening plates 104 are perpendicular to the two second ear plates 102. The stiffening plates 104 are provided to improve the load-bearing capacity of the component at the stress points. The number of stiffening plates 104 can be three, four or other numbers.

[0046] When the buckle 7 passes through the first through hole 108, it will generate concentrated tension around the hole. If multiple first through holes 108 are connected only by the anchor plate 103 itself, stress concentration in the inter-hole area is likely to occur. The vertical stiffening plate 104 is equivalent to building a force support between the first through holes 108, which can transfer the local tension of a single first through hole 108 to the surrounding area and the second ear plate 102, dispersing the concentrated stress to a larger area of ​​the structure, preventing the anchor plate 103 from cracking or deforming due to excessive inter-hole stress, and extending the service life of the anchor plate 103.

[0047] In an optional embodiment, a second through hole 105 is provided at the end of the first ear plate 101 that is connected to the connecting structure 2 for the first pin 4 to pass through.

[0048] The size of the second through hole 105 needs to match the size of the first pin 4. The second through hole 105 is a circular through hole, or it can be a through hole of other shapes to adapt to the type and shape of the first pin 4. The first pin 4 is a common cylindrical pin, or it can be a tapered pin, an open pin, a slotted pin, a flexible cylindrical pin, or other types of pins.

[0049] In an optional embodiment, the second through hole 105 is an elliptical through hole.

[0050] In an optional embodiment, a lifting lug 106 is provided on the edge of the first ear plate 101. The lifting lug 106 is roughly annular in shape with a circular through hole in the middle to achieve lifting adaptation, transfer the lifting load, and ensure the safety and stability of the lifting process. Alternatively, the lifting lug 106 can also be of other shapes.

[0051] In an optional embodiment, the surface of the second ear plate 102 is configured in the shape of arrow feathers, such as... Figure 2 As shown.

[0052] The arrow-shaped design optimizes stress flow and avoids localized stress concentration. When subjected to the tension of the buckle 77, the stress can be evenly distributed along the gradual contour of the arrow-shaped cross-section, preventing stress concentration points at the root of the ear plate or around the pin hole, thus extending the service life of the ear plate. The arrow-shaped design can specifically enhance the strength of the ear plate in key stress directions while achieving weight reduction. Alternatively, the cross-section of the second ear plate 102 along the plane of the steering structure 3 can also be rectangular, circular, elliptical, trapezoidal, or other shapes.

[0053] In an optional embodiment, the connection between the first ear plate 101 and the two second ear plates 102 and the connection between the two second ear plates 102 and the anchor plate 103 are both welded.

[0054] Example 2 like Figure 9 and Figure 10 As shown, a connection method for a fastening point device for the construction of an arch bridge cable-stayed structure is described in Example 1. Each anchor head 1 of the fastening point device for the construction of an arch bridge cable-stayed structure is connected to a fastening saddle 5 at different positions on the same tower via a fastening cable 7.

[0055] Specifically, the cable saddle 5 is connected to a cable-stayed bridge cable-stayed construction device as described in Example 1 on one side of the cable 7, and to a ground anchor 13 on the other side; each anchor head 1 of the cable point can be connected to the cable saddle 5 at different heights.

[0056] Traditional tie-in structures use multiple bundles of tie cables 7 that can only be connected to the same tower saddle. This makes it difficult to use the working cable to pull the entire bundle of tie cables 7 during installation, and the tie cables 7 are too densely arranged, making them prone to tangling during tensioning, thus affecting construction efficiency. In addition, connecting multiple bundles of tie cables 7 to the same tie cable saddle 5 results in excessive vertical concentrated loads, increasing the load-bearing capacity requirements of the tie cable saddle 5 platform, increasing the amount of steel used in the tower, and failing to effectively utilize the tower's space and fully utilize the tower's overall load-bearing capacity.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fastening device for the construction of an arch bridge cable-stayed structure, comprising a steering structure (3) and several connecting structures (2), wherein the steering structure (3) and several connecting structures (2) are connected by a first pin (4), characterized in that, It also includes at least two anchor heads (1), the number of which is the same as the number of the connecting structures (2). Each anchor head (1) includes a first ear plate (101), two second ear plates (102), and an anchor plate (103). One end of the first ear plate (101) of the same anchor head (1) is connected to the connecting structure (2), and the other end is connected to the two second ear plates (102). The anchor plate (103) is vertically fixed between the two second ear plates (102). The anchor plate (103) is provided with a first through hole (108) for installing the buckle (7).

2. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 1, characterized in that, The anchor plate (103) is arranged in a matrix with a plurality of first through holes (108).

3. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 2, characterized in that, The number of the first through holes (108) in the horizontal and vertical directions of the anchor plate (103) are equal.

4. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 2, characterized in that, The anchor plate (103) is provided with a plurality of anchors (107) for fixing the buckle (7) on the side near the first ear plate (101), and the number of anchors (107) is equal to the number of through holes.

5. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 2, characterized in that, A plurality of vertical stiffening plates (104) are provided between the first through holes (108), and the vertical stiffening plates (104) are perpendicular to the two second ear plates (102).

6. The fastening point device for the cable-stayed construction of an arch bridge according to claim 1, characterized in that, The first ear plate (101) is connected to the connecting structure (2) at one end, and a second through hole (105) is provided for the first pin (4) to pass through.

7. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 6, characterized in that, The second through hole (105) is an elliptical through hole.

8. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 1, characterized in that, The edge of the first ear plate (101) is provided with a lifting lug (106).

9. A fastening point device for the construction of an arch bridge cable-stayed structure according to any one of claims 1-7, characterized in that, The surface of the second ear plate (102) is configured as an arrow feather shape.

10. The fastening point device for the construction of an arch bridge cable-stayed structure according to claim 1, characterized in that, The connection between the first ear plate (101) and the two second ear plates (102) and the connection between the two second ear plates (102) and the anchor plate (103) are both welded.

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