Stay cable tower anchoring structure

Abstract

The utility model provides a stay cable tower anchoring structure which comprises a bridge tower, a stay cable anchoring part and an X-shaped anchoring part, a central cavity is formed in the bridge tower, the X-shaped anchoring part is located in the central cavity, the four corners of the X-shaped anchoring part are connected to the tower wall of the bridge tower through anchoring connecting assemblies respectively, and the X-shaped anchoring part is located in the central cavity. Inhaul cable connecting cavities are formed in the ends, close to the bridge tower, of the four corners of the X-shaped anchoring part, the stay cable anchoring parts are arranged in the inhaul cable connecting cavities, and the stay cable anchoring parts are fixedly connected to the X-shaped anchoring part. According to the stay cable tower anchoring structure, in the process that the same pair of stay cables are tensioned in batches, the cable force of the stay cables is borne by the four tower walls together, the cable force of the four stay cables on the two sides of the bridge tower is transmitted along the axis of the X-shaped anchoring part and converged to the same point, the horizontal component force can be basically balanced, and the unbalanced horizontal component force can be evenly distributed; through the structural design, the stress level of the steel member and the concrete stress level of the bridge tower can be reduced, and the size of the steel member and the concrete reinforcement of the bridge tower are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge design and construction, and particularly relates to a cable tower anchoring structure. Background Art

[0002] At present, the main anchoring methods of the cable-stayed cable at the concrete tower end include cross anchoring, side wall anchoring, steel anchor beam anchoring, and steel anchor box anchoring.

[0003] Cross anchoring is primarily used on solid towers. Its characteristic is that the cables on either side of the tower cross and pass through steel pipes embedded in the solid tower column, anchoring to channel-shaped brackets on the other side of the tower wall. Cross anchoring offers advantages such as simple construction, ease of construction, and economic efficiency, making it widely used in the early construction of small and medium-span cable-stayed bridges. However, it also suffers from drawbacks such as difficulty in cable replacement and high maintenance costs, leading to its seldom-used use today.

[0004] Sidewall anchoring anchors the stay cables to concrete teeth on the inner wall of the hollow tower. With this anchoring method, the cable forces are primarily borne by the concrete tower, generating significant tensile stresses in the tower wall. This requires the application of circumferential prestressing in the anchoring area, resulting in a lower overall cost. However, due to the size of the tower, the applied circumferential prestressing is typically short and has a large bending radius. This can lead to significant prestress loss, construction difficulties, and inadequate grouting of the pipes.

[0005] The steel anchor beam is a beam-type component mounted on a concrete or steel bracket on the inner wall of the tower. The cables on both sides are anchored to the steel beam, balancing most of the horizontal forces acting on them. Unbalanced horizontal forces are transmitted to the concrete tower wall via the steel crossbeam's lower supports and limiters. The vertical forces of the cables are transferred to the steel or concrete bracket on the inner side of the tower column. Steel anchor box concrete bridge towers experience minimal stress on the tower wall, resulting in improved structural durability and a relatively low cost for the steel anchor beam.

[0006] Steel anchor box anchoring involves anchoring the stay cables to the steel anchor box, transferring the cable forces at both ends of the tower to the anchor box. The majority of the horizontal force components of the cables are balanced by the steel anchor box plate. Unbalanced horizontal and vertical forces are then transferred to the concrete tower via shear pins installed on the anchor box plate. Steel anchor boxes use a relatively high amount of steel and require hoisting, resulting in a relatively high overall cost. Utility Model Content

[0007] The purpose of the utility model is to provide a cable tower anchoring structure, which can at least solve some of the defects in the prior art.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A cable-stayed cable tower anchoring structure includes a bridge tower, a cable-stayed cable anchor, and an X-shaped anchor. The bridge tower has a central chamber inside, the X-shaped anchor is located in the central chamber, and the four corners of the X-shaped anchor are respectively connected to the tower wall of the bridge tower through anchor connection components. The four corners of the X-shaped anchor have cable connection chambers at one end close to the bridge tower, the cable-stayed cable anchor is placed in the cable connection chamber, and the cable-stayed cable anchor is fixedly connected to the X-shaped anchor.

[0010] Furthermore, the bridge tower is a hollow octagonal structure, and the inner hollow area thereof constitutes the central cavity.

[0011] Furthermore, the X-shaped anchor includes a first anchoring segment and a second anchoring segment, the first anchoring segment is X-shaped, there are four second anchoring segments, which are respectively extended along the four corners of the first anchoring segment, one end of the second anchoring segment is connected to the end of the first anchoring stage, and the other end of the second anchoring segment is connected to the anchor connection assembly, and the cable connection cavity is located on the second anchoring segment near one end of the anchor connection assembly.

[0012] Furthermore, the first anchoring segment includes a rectangular body located in the middle, and four docking parts extending symmetrically outward on both sides of the rectangular body for connecting with the second anchoring segment; the width direction of the rectangular body is arranged along the bridge direction, and the four docking parts are arranged in an X shape.

[0013] Furthermore, the two docking portions on the same side of the rectangular body are connected by an arc-shaped connecting section.

[0014] Furthermore, the rectangular body includes two first side webs arranged relatively parallel to each other, an intermediate web arranged between the two first side webs and parallel to the first side webs, and a first transverse partition connecting the first side webs and the intermediate webs; the first side webs and the first transverse partition constitute a rectangular frame, and the length of the intermediate web is greater than the length of the first side web.

[0015] Furthermore, the docking portion includes two relatively parallel docking webs, the ends of the two docking webs close to the rectangular body are respectively connected to the first side web and the middle web end, and the ends of the two docking webs away from the rectangular body are connected to the second anchoring segment.

[0016] Furthermore, the second anchoring segment includes two second side webs arranged relatively parallel to each other, a second transverse partition connected between the two second side webs, and a top plate and a bottom plate respectively covering the upper and lower surfaces of the two second side webs; the top plate is arranged near one end of the first anchoring segment.

[0017] Furthermore, the anchor connection assembly includes a tower wall thick steel plate and a shear key, the shear key is welded to one side of the tower wall thick steel plate, the tower wall thick steel plate is connected to the tower wall of the bridge tower through the shear key, and the end of the X-shaped anchor is connected to the side of the tower wall thick steel plate facing away from the shear key.

[0018] Furthermore, the stay cable anchor is connected to the X-shaped anchor at an angle, and the inclination angle of the stay cable anchor is consistent with the inclination angle of the stay cable.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) In the process of tensioning the same pair of cables in batches, the cable-stayed cable tower anchoring structure provided by the utility model will have the cable forces borne by the four tower walls together, and the cable forces of the four cables on both sides of the bridge tower will be transmitted along the axis of the X-shaped anchor and converge at the same point. The horizontal force components can be basically balanced, and the unbalanced horizontal force components can be evenly distributed. This structural design can reduce the stress level of steel components and the stress level of bridge tower concrete, reduce the size of steel components and the reinforcement of bridge tower concrete, and achieve better economic and technical indicators.

[0021] (2) In the inclined cable tower anchoring structure provided by the present invention, a cable connection cavity is provided at the end of the X-shaped anchor, and the inclined cable anchor is placed therein, which significantly reduces the out-of-plane bending moment of the X-shaped anchor.

[0022] (3) The X-shaped anchor piece in the cable tower anchor structure provided by the utility model can be manufactured in sections. The weight of a single section is low, the lifting capacity requirement is relatively low, and the construction difficulty is low.

[0023] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a plan view of the anchoring structure of the inclined-stayed cable tower of the utility model;

[0025] Figure 2 yes Figure 1 A three-dimensional cross-sectional view along the axis of the X-shaped anchor;

[0026] Figure 3 This is a schematic planar section diagram of an X-shaped anchor in an embodiment of the present utility model;

[0027] Figure 4 1 is a plan view of a first anchoring segment of an X-shaped anchor in an embodiment of the present invention;

[0028] Figure 5 yes Figure 4 Middle AA stereoscopic cross-section;

[0029] Figure 6 yes Figure 4 BB stereoscopic cross-section;

[0030] Figure 7 1 is a plan view of the second anchoring segment of the X-shaped anchor in an embodiment of the present invention;

[0031] Figure 8 yes Figure 7 a three-dimensional cross-section of the middle CC;

[0032] Figure 9 yes Figure 7 Middle DD three-dimensional cross-section diagram.

[0033] Explanation of the accompanying reference numerals: 1. Bridge tower; 2. Central chamber; 3. X-shaped anchor; 4. Cable connection chamber; 5. Cable anchor; 6. Anchor connection assembly; 7. Tower wall thick steel plate; 8. Shear key; 9. First anchor segment; 10. Second anchor segment; 11. First side web; 12. Diaphragm; 13. Middle web; 14. Arc-shaped connecting section; 15. Butt web; 16. Cover plate; 17. Second side web; 18. Second diaphragm; 19. Bottom plate; 20. Top plate. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0035] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0038] like Figure 1 and Figure 2 As shown, this embodiment provides a cable-stayed cable tower anchoring structure, including a bridge tower 1, a cable-stayed cable anchor 5 and an X-shaped anchor 3. The bridge tower 1 has a central chamber 2 inside, the X-shaped anchor 3 is located in the central chamber 2, and the four corners of the X-shaped anchor 3 are respectively connected to the tower wall of the bridge tower 1 through anchor connection components 6, and the four corners of the X-shaped anchor 3 are close to the end of the bridge tower 1. The cable-stayed cable anchor 5 is placed in the cable connection cavity 4, and the cable-stayed cable anchor 5 is fixedly connected to the X-shaped anchor 3. In this embodiment, four stay cables on either side of tower 1 pass through the tower wall and are anchored to corresponding stay cable anchors 5 at the four corners of X-shaped anchors 3. In this structure, the cable force transmission path is as follows: the cable forces on either side of tower 1 are first transmitted to the stay cable anchors 5, and then to the X-shaped anchors 3 via the stay cable anchors 5. The X-shaped anchors 3 balance the majority of the horizontal force components between the stay cables, while the remaining unbalanced horizontal and vertical force components are transmitted to the tower wall of tower 1 via the anchor connection assembly 6. This embodiment provides a stay cable tower anchor structure in which the cable forces of the four stay cables are all transmitted along the axis of the X-shaped anchor 3 and converge at a single point, making force transmission simpler and more efficient, and effectively and evenly distributing the unbalanced horizontal force components. This reduces the stress levels of the steel components and the tower concrete, and reduces the size of the steel components and the reinforcement of the tower concrete.

[0039] Specifically, the bridge tower 1 in this embodiment is designed as a hollow octagonal structure, with the hollow area within it forming the central chamber 2. Specifically, the four walls of the bridge tower 1 are square, with the ends of two adjacent walls connected by chamfers, resulting in a bridge tower 1 structure with an octagonal cross-sectional profile. X-shaped anchors 3 are placed horizontally within the hollow area within the bridge tower 1, with the four corners of the X-shaped anchors 3 connected to the four chamfers. This structural design effectively transmits the cable forces to the concrete walls of the bridge tower.

[0040] Specifically, such as Figure 1 and Figure 2 As shown, when the inclined cable anchor 5 is installed, the center line of the inclined cable anchor 5 is set at a certain angle to the axis of the X-shaped anchor 3, that is, the inclined cable anchor 5 is connected to the X-shaped anchor 3 at an angle, and the inclination angle of the inclined cable anchor 5 is consistent with the inclination angle of the inclined cable.

[0041] As a specific implementation method, Figure 3 As shown, the X-shaped anchor 3 includes a first anchoring segment 9 and a second anchoring segment 10. The first anchoring segment 9 is X-shaped, and there are four second anchoring segments 10, extending along the four corners of the first anchoring segment 9. One end of the second anchoring segment 10 is connected to the end of the first anchoring segment 9, and the other end of the second anchoring segment 10 is connected to the anchor connection assembly 6. The cable connection cavity 4 is located on the second anchoring segment 10 near one end of the anchor connection assembly 6. In this embodiment, the X-shaped anchor 3 adopts a segmented assembly structure design. Each individual segment is low in weight, and the lifting capacity requirement is relatively low, which reduces the construction difficulty.

[0042] In some embodiments, as Figure 4 、 Figure 5 and Figure 6 As shown, the first anchoring segment 9 includes a rectangular main body located in the middle, and four docking portions extending symmetrically outward on both sides of the rectangular main body for connecting with the second anchoring segment 10; the width direction of the rectangular main body is arranged along the longitudinal direction of the bridge, and the four docking portions are arranged in an X shape. Specifically, the rectangular main body includes two first side webs 11, an intermediate web 13, and four transverse partitions 12, wherein the two first side webs 11 are arranged relatively parallel, the intermediate web 13 is arranged between the two first side webs 11 and parallel to the first side webs 11, and the four transverse partitions 12 respectively connect the two first side webs 11 and the ends of the intermediate web 13. The two first side webs 11 and the four first transverse partitions 12 form a rectangular frame, the thickness of the intermediate web 13 is relatively thick, and the length of the intermediate web 13 is greater than the length of the first side web 11. The docking portion includes two relatively parallel docking webs 15, and the ends of the two docking webs 15 close to the rectangular body are respectively connected to the ends of the first side web 11 and the middle web 13, and the ends of the two docking webs 15 away from the rectangular body are connected to the second anchoring segment 10.

[0043] Optionally, the upper and lower surfaces of the rectangular body and the docking part are provided with a cover plate 16, and the cover plate 16 of the rectangular body and the docking part are an integrated structure, and the rectangular body and the docking part are further connected as a whole by the cover plate 16, thereby improving the overall strength of the first anchoring segment 9.

[0044] Preferably, the two docking parts on the same side of the rectangular body are connected by an arc-shaped connecting section 14. Specifically, the arc-shaped connecting section 14 is used between the two docking webs 15 at the same end of the middle web 13 to connect the cover plates 16 of the two docking parts to increase the connection strength between the two adjacent docking parts.

[0045] In some embodiments, as Figure 7 、 Figure 8 and Figure 9 As shown, the second anchoring segment 10 includes two second side webs 17, a plurality of second transverse partitions 18, a bottom plate 19 and a top plate 20, wherein the two second side webs 17 are arranged relatively parallel, and one end portion of the two second side webs 17 is respectively docked with the two docking webs 15 of the docking portion, and a plurality of second transverse partitions 18 are arranged between the two second side webs 17 along the extension direction of the second side webs 17 at intervals, and the top plate 20 and the bottom plate 19 respectively cover the upper and lower surfaces of the two second side webs 17, and the top plate 20 and the bottom plate 19 are respectively connected to the cover plates 16 on the upper and lower surfaces of the docking portion to form a whole; at the same time, the top plate 19 is designed to only cover the part of the two second side webs 17 close to one end of the first anchoring segment 9, that is, the top between the two second side webs 17 away from one end of the first anchoring segment 9 is an open structure, and this open part constitutes a cable connection cavity 4 for installing the inclined cable anchor 5. In this embodiment, the second anchoring segment 10 of the X-shaped anchor 3 is a rectangular frame structure, and the inclined cable anchor 5 is placed between the two second side webs 17 of the second anchoring segment 10, which significantly reduces the out-of-plane bending moment of the second side webs 17.

[0046] As a specific implementation method, Figure 1 and Figure 2 As shown, the anchor connection assembly 6 includes a tower wall thick steel plate 7 and a shear key 8. The shear key 8 is welded to one side of the tower wall thick steel plate 7. The end of the X-shaped anchor 3 is connected to the side of the tower wall thick steel plate 7 facing away from the shear key 8. The tower wall thick steel plate 7 forms a stable connection with the tower wall concrete part of the bridge tower 1 through the shear key 8 to transfer the load.

[0047] The construction process of the stayed cable tower anchor structure of this embodiment is as follows:

[0048] 1) Various plates of the stay cable anchor 5 and the X-shaped anchor 3 are manufactured separately in a factory, and the first anchoring segment 9 and the second anchoring segment 10 of the X-shaped anchor 3 and the stay cable anchor 5 are formed by welding.

[0049] 2) The stay cable anchor 5 and the side web of the second anchoring segment 10 of the X-shaped anchor 3 are welded into one piece.

[0050] 3) Weld the shear key 8 to the tower wall thick steel plate 7 to form the anchor connection assembly 6.

[0051] 4) Pre-embed the tower wall thick steel plate 7 into the tower wall concrete of the bridge tower 1.

[0052] 5) After hoisting the second anchoring segment 10 of the X-shaped anchor 3 together with the inclined cable anchor 5 to the designated position, weld them to the tower wall thick steel plate 7; then butt weld the first anchoring segment 9 and the second anchoring segment 10 of the X-shaped anchor 3.

[0053] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention.

Claims

1. A cable tower anchoring structure, characterized by: The invention comprises a bridge tower, a stay cable anchor and an X-shaped anchor. The bridge tower has a central chamber inside, the X-shaped anchor is located in the central chamber, and the four corners of the X-shaped anchor are respectively connected to the tower wall of the bridge tower through anchor connection components. The four corners of the X-shaped anchor are provided with a cable connection cavity at one end close to the bridge tower, the stay cable anchor is placed in the cable connection cavity, and the stay cable anchor is fixedly connected to the X-shaped anchor.

2. The stayed cable tower anchoring structure according to claim 1, wherein: The bridge tower is a hollow octagonal structure, and the inner hollow area thereof constitutes the central cavity.

3. The stayed cable tower anchoring structure according to claim 1, wherein: The X-shaped anchor includes a first anchoring segment and a second anchoring segment, the first anchoring segment is X-shaped, and there are four second anchoring segments, which are respectively extended along the four corners of the first anchoring segment, one end of the second anchoring segment is connected to the end of the first anchoring segment, and the other end of the second anchoring segment is connected to the anchor connection assembly, and the cable connection cavity is located on the second anchoring segment near one end of the anchor connection assembly.

4. The stayed cable tower anchoring structure according to claim 3, wherein: The first anchoring segment includes a rectangular main body located in the middle, and four docking parts extending symmetrically outward on both sides of the rectangular main body for connecting with the second anchoring segment; the width direction of the rectangular main body is arranged along the bridge direction, and the four docking parts are arranged in an X shape.

5. The stayed cable tower anchoring structure according to claim 4, characterized in that: The two docking portions on the same side of the rectangular body are connected by an arc-shaped connecting section.

6. The stayed cable tower anchoring structure according to claim 4, characterized in that: The rectangular body includes two first side webs arranged relatively parallel to each other, an intermediate web arranged between the two first side webs and parallel to the first side webs, and a first transverse partition connecting the first side webs and the intermediate webs; the first side webs and the first transverse partition form a rectangular frame, and the length of the intermediate web is greater than the length of the first side webs.

7. The stayed cable tower anchoring structure according to claim 6, wherein: The docking portion includes two relatively parallel docking webs, wherein one end of the two docking webs close to the rectangular body is respectively connected to the first side web and the end of the middle web, and one end of the two docking webs away from the rectangular body is connected to the second anchoring segment.

8. The stayed cable tower anchoring structure according to claim 3, wherein: The second anchoring segment includes two second side webs arranged relatively parallel to each other, a second transverse partition connected between the two second side webs, and a top plate and a bottom plate respectively covering the upper and lower surfaces of the two second side webs; the top plate is arranged near one end of the first anchoring segment.

9. The stayed cable tower anchoring structure according to claim 1, wherein: The anchor connection assembly includes a tower wall thick steel plate and a shear key, the shear key is welded to one side of the tower wall thick steel plate, the tower wall thick steel plate is connected to the tower wall of the bridge tower through the shear key, and the end of the X-shaped anchor is connected to the side of the tower wall thick steel plate facing away from the shear key.

10. The stayed cable tower anchoring structure according to claim 1, wherein: The stay cable anchor is connected to the X-shaped anchor at an angle, and the inclination angle of the stay cable anchor is consistent with the inclination angle of the stay cable.

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