Tower end permanent and temporary dual-purpose section steel anchoring part of self-anchored suspension bridge, main tower end structure and construction method of main tower end structure

Abstract

The invention discloses a tower end permanent and temporary dual-purpose profile steel anchoring part of a self-anchored suspension bridge, a main tower end structure and a construction method of the main tower end structure. The tower end permanent and temporary dual-purpose profile steel anchoring part comprises an anchoring end and a permanent and temporary connecting end, wherein the anchoring end is poured in a concrete tower column, and the permanent and temporary connecting end is exposed out of a transverse bridge of the concrete tower column and is used for being permanently connected with a steel transverse support between two concrete tower columns which are arranged on the same main tower and are distributed in the transverse bridge direction, and is temporarily connected with a temporary buckle cable; the dual-purpose connecting function of permanent connection with the steel cross brace and temporary connection with the temporary buckle cable is achieved through the permanent and temporary connecting ends, erecting of a temporary cable bent tower on the concrete tower column can be avoided, the construction risk of the temporary cable bent tower is avoided, materials for constructing the temporary cable bent tower are saved, and the construction cost is reduced. The construction difficulty of connection of the steel cross brace and the temporary cable on the main tower of the self-anchored suspension bridge is lowered, the construction cost of temporary cable buckle construction is lowered, and meanwhile the requirement for replacement construction of the main cable in the later operation stage of the self-anchored suspension bridge is met.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction engineering, and in particular to a permanent and temporary dual-purpose steel anchor piece for a tower end of a self-anchored suspension bridge, a main tower end structure and a construction method thereof. Background Art

[0002] Due to the limitations of their structural system, self-anchored suspension bridges must be constructed using a girder-first, cable-later construction sequence. These bridges are typically assembled using either scaffolding or cable-stayed cantilever methods. While the former is simple to construct, it can affect navigation and flood discharge, and poses the risk of collision with passing ships and floating objects. The latter, while requiring minimal or no scaffolding for long-span main girder construction, often requires the erection of temporary pylons for cable installation, making construction more difficult, costly, and risky. Summary of the Invention

[0003] The purpose of the present invention is to provide a tower end anchor for a self-anchored suspension bridge and a tower end permanent and temporary cable anchoring structure to solve the problems of difficulty in constructing temporary cable towers and installing cable-stayed cables, high project costs and high safety risks.

[0004] In order to solve the above technical problems, the present invention provides a permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the permanent and temporary dual-purpose steel anchor comprises an anchor end cast in the concrete tower column and a permanent connection end exposed outside the transverse direction of the concrete tower column for permanent connection with a steel cross brace between two concrete tower columns distributed in the transverse direction of the same main tower and for temporary connection with a temporary cable.

[0005] Furthermore, the present invention provides a permanent dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the anchor end includes a vertically arranged end plate, and a plurality of spaced open plates vertically arranged on one side of the end plate, wherein the open plates are provided with through holes for passing the column reinforcement of the concrete tower column.

[0006] Furthermore, the present invention provides a permanent dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein shear nails are provided on both sides of the perforated plate, and connecting plates are vertically provided between adjacent perforated plates.

[0007] Furthermore, the present invention provides a permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the permanent connection end comprises a box body with open ends composed of a bottom plate, a top plate, and two side plates, wherein one open end of the box body is arranged at an angle on the end plate, and the other open end of the box body is retracted or closed with a partition, and the partition body and the bottom plate, top plate, and side plate at the end where the partition body is located form a permanent connection part for connecting the steel cross brace, and the box body is provided with multiple conduits for passing temporary buckles in two directions from one side plate to the other side plate, one end of the conduit is an entry end, and the other end is an exit end, and the exit end is provided with an anchor plate attached to the side plate on the side, and the end of the anchor plate away from the side plate is a temporary connection part for the temporary buckle.

[0008] Furthermore, the tower end permanent dual-purpose steel anchor of the self-anchored suspension bridge provided by the present invention is provided with an inner web parallel to the side panel in the unclosed box body, the upper and lower ends of the inner web are respectively connected to the top plate and the bottom plate, and the conduit passes through the inner web.

[0009] Furthermore, the present invention provides a permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the permanent connection end also includes stiffening plates welded between the partition and the top plate, bottom plate, and side plates.

[0010] Furthermore, the present invention provides a dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the conduit is in an arc shape with one end high and the other end low, the high end of the conduit is the exit end, and the low end of the conduit is the entry end.

[0011] Furthermore, the present invention provides a permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, wherein the top plate is provided with a plurality of grouting holes for welding steel cross braces to the permanent connection portion and then pouring steel fiber concrete into the box body.

[0012] Compared with the prior art, the beneficial effects of the permanent and temporary dual-purpose steel anchors of the tower end of the self-anchored suspension bridge of the present invention are as follows:

[0013] The anchoring end of the permanent and temporary dual-purpose steel anchor at the tower end is cast on the concrete tower column of the main tower of the self-anchored suspension bridge, and the permanent connecting end of the permanent and temporary dual-purpose steel anchor at the tower end extends out of the transverse direction of the concrete tower column, so that the permanent connecting end realizes the dual-purpose connection functions of permanent connection with the steel cross brace and temporary connection with the temporary cable respectively, which can avoid the erection of temporary cable towers on the concrete tower column, avoid the construction risk of temporary cable towers, save materials for the construction of temporary cable towers, reduce the construction difficulty of connecting steel cross braces and temporary cables on the main tower of the self-anchored suspension bridge, reduce the engineering cost of temporary cable buckle construction, and meet the needs of main cable replacement construction in the later operation stage of the self-anchored suspension bridge.

[0014] In order to solve the above technical problems, the present invention also provides a main tower end structure of a self-anchored suspension bridge, including two concrete tower columns distributed in the transverse direction of the bridge on the tower ends of each main tower of the self-anchored suspension bridge, and steel cross braces symmetrically anchored between the two concrete tower columns. Each end of the steel cross brace is set on the concrete tower column through the above-mentioned tower end permanent and temporary dual-purpose steel anchor. The steel cross brace is a fancy structure composed of steel sections distributed crosswise in the same plane.

[0015] In order to solve the above technical problems, the present invention also provides a construction method for a main tower end structure of a self-anchored suspension bridge, comprising:

[0016] Construct the concrete tower column in sections;

[0017] In the current section of the concrete tower column construction stage, pre-embed the bracket;

[0018] Hoist the permanent and temporary dual-purpose steel anchors at the tower end onto the bracket;

[0019] Adjust the elevation of the permanent dual-purpose steel anchor at the tower end by using a jack, and then weld it to the bracket by tilting the tie rod;

[0020] Remove the jacks, pour the next section of concrete to form the next section of the concrete tower column, and anchor the anchor ends of the permanent and temporary dual-purpose steel anchors at the tower ends, the tie rods, and the brackets into the next section of the concrete tower column, so that the permanent connection ends of the permanent and temporary dual-purpose steel anchors at the tower ends extend out of the concrete tower column in the transverse direction, and the permanent connection ends of the two concrete tower columns of the same main tower are relatively distributed;

[0021] Steel cross braces are welded between the two concrete columns of the same main tower through permanent and temporary dual-purpose steel anchors at the tower ends;

[0022] Pour steel fiber concrete into the box through the grouting holes on the top plate;

[0023] Temporary cables are connected in two directions along the bridge through temporary connection parts in each direction of the permanent and temporary dual-purpose steel anchors at the tower end.

[0024] Compared with the prior art, the main tower end structure of the self-anchored suspension bridge and the construction method thereof provided by the present invention have the following beneficial effects:

[0025] The anchorage ends of the permanent and temporary steel anchors at the tower ends are set on the two concrete pylons of the main tower of a self-anchored suspension bridge. The fancy-shaped steel cross braces are connected to the tower ends of the main towers via the permanent and temporary steel anchors, distributed across the two concrete pylons in the transverse direction of the bridge. This allows the permanent and temporary connection ends of the tower-end permanent and temporary steel anchors to function as both permanent and temporary connections to the steel cross braces and temporary cables, respectively. This avoids the need for erecting temporary cable towers on concrete columns, mitigates the construction risks of temporary cable towers, conserves materials for constructing temporary cable towers, reduces the difficulty of connecting the steel cross braces and temporary cables on the main towers of the self-anchored suspension bridge, and lowers the cost of temporary cable cable construction. This also meets the need for main cable replacement during the later operational stages of the self-anchored suspension bridge. Furthermore, the fancy-shaped steel cross braces offer excellent integrity, enhancing the strength and stability of the connection between the two concrete tower columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the main tower end structure of a self-anchored suspension bridge;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of a permanent and temporary dual-purpose steel anchor at the tower end of a self-anchored suspension bridge according to one embodiment;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of a permanent and temporary dual-purpose steel anchor at the tower end of a self-anchored suspension bridge according to another embodiment;

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of a permanent and temporary dual-purpose steel anchor at the tower end of a self-anchored suspension bridge according to another embodiment;

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the permanent and temporary dual-purpose steel anchors at the tower end of a self-anchored suspension bridge;

[0031] Figures 6 to 9 This is a schematic diagram of the construction process of the main tower end structure of a self-anchored suspension bridge;

[0032] As shown in the figure:

[0033] 1. Main tower end structure of self-anchored suspension bridge;

[0034] 100, concrete tower column, 110, section concrete tower injection, 120, bracket, 130, tie rod;

[0035] 200, steel cross bracing;

[0036] 300, permanent and temporary steel anchor at tower end, 310, anchor end, 311, end plate, 312, perforated plate, 313, through hole, 314, shear studs, 315, connection plate, 320, permanent connection end, 321, bottom plate, 322, top plate, 323, side plate, 334, partition, 325, guide tube, 326, anchor pad, 327, inner web, 328, stiffener, 329, grouting hole;

[0037] 400. Pull rod. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are all in a very simplified form and are not accurately scaled, and are only used to facilitate and clearly illustrate the embodiments of the present invention.

[0039] Please refer to Figures 1 to 9 An embodiment of the present invention provides a main tower end structure 1 for a self-anchored suspension bridge. The structure comprises two concrete columns 100 located at the ends of each main tower of the self-anchored suspension bridge, arranged transversely to the bridge. A steel cross brace 200 is symmetrically anchored between the two concrete columns 100. Each end of the steel cross brace 200 is attached to the concrete columns 100 via the aforementioned permanent and temporary steel anchors 300. The steel cross brace 200 may be a fancy structure composed of cross-sectioned steel arranged in a plane. Specifically, the permanent and temporary steel anchors 300 are located at the junction of the concrete columns 100 and the steel cross brace 200. The main tower end structure 1 of the self-anchored suspension bridge forms a steel-concrete structure. The concrete columns 100 are reinforced concrete.

[0040] Please refer to Figures 1 to 5An embodiment of the present invention provides a permanent and temporary steel anchor 300 for a self-anchored suspension bridge tower end. The tower end permanent and temporary steel anchor 300 includes an anchor end 310 cast within the concrete tower column 100 and a temporary connection end 320 exposed transversely of the concrete tower column 100 for permanent connection to a steel cross brace 200 between two transversely spaced concrete tower columns 100 on the same main tower, as well as for temporary connection to a temporary cable. The anchor end 310 comprises a vertically arranged end plate 311 and a plurality of spaced-apart perforated plates 312 perpendicularly disposed to one side of the end plate 311. The perforated plates 312 are provided with through-holes 313 for receiving the column reinforcement bars of the concrete tower column 100. The through-holes 313 of the perforated plates 312 allow for the passage of the column reinforcement bars of the concrete tower column 100, thereby improving the reliability and stability of the anchoring of the tower end permanent and temporary steel anchor 300. To enhance the reliability and stability of the permanent and temporary steel anchor 300 on the concrete column 200, a plurality of shear studs 314 may be provided on both sides of the perforated plate 312. To enhance the structural stability of the permanent and temporary steel anchor 300, multiple connecting plates 315 may be vertically interposed between adjacent perforated plates 312. The connecting plates 315 intersect perpendicularly with the perforated plates 312. To enhance the stability of the anchor 300 within the concrete column 200, shear studs 314 may be provided on the side of the end plate 311 facing the perforated plate 312. Through holes 313 for column reinforcement may also be provided in the connecting plates 315.

[0041] Please refer to Figures 1 to 5The embodiment of the present invention provides a permanent and temporary dual-purpose steel anchor 300 for the tower end of a self-anchored suspension bridge. The permanent connection end 320 includes a box body with open ends composed of a bottom plate 321, a top plate 322, and two side plates 323. One open end of the box body is arranged at an angle on the end plate 311, and the other open end of the box body is indented or closed with a partition 324. The partition 324 and the bottom plate 321, top plate 322, and side plates 323 at its end form a permanent connection part for connecting the steel cross brace 200. The box body is bidirectionally penetrated from one side plate 323 to the other side plate 323 by a plurality of conduits 325 for passing temporary buckles. One end of the conduit 325 is an insertion end, and the other end is an exit end. The exit end is provided with an anchor plate 236 attached to the side plate 323 on the side. The end of the anchor plate 236 away from the side plate 323 is a temporary connection part for the temporary buckle. According to the different angles of the box body of the permanent connection end 320 relative to the end plate 311 of the anchoring end 310, the upper tower end permanent and temporary dual-purpose steel anchor 300, the middle tower end permanent and temporary dual-purpose steel anchor 300 and the lower tower end permanent and temporary dual-purpose steel anchor 300 suitable for the steel cross brace 200 at the upper, middle and lower node areas can be formed, respectively as shown in FIG. Figures 2 to 4 shown. Figure 1 Each concrete tower column 100 is illustrated with two permanent and temporary steel anchors 300 at the upper tower end, one permanent and temporary steel anchor 300 at the middle tower end, and two permanent and temporary steel anchors 300 at the lower tower end. The permanent connection portion 320 is used for welding or bolting to the steel cross brace 200, while the temporary connection portion 320 is used for inserting temporary cable through a guide tube 325 and attaching it to an anchor pad 326 via an anchor. Thus, the permanent connection portion 320 of the tower-end permanent and temporary steel anchor 300 serves the dual purpose of connecting the steel cross brace 200 and the temporary cable. The angle between the box body of the permanent dual-purpose steel anchor 300 at the upper tower end and the end plate 311 is arranged upward. The top plate 322 is not limited to a flat plate, but can be a folding plate. The side plates 323 are not limited to regular plates such as parallelogram plates or rectangular plates, but can be irregular plates composed of parallelogram plates and triangular plates. The irregular plates are not limited to a whole piece, but can be an assembled structure. At this time, the triangular plate between the top plate 322 and the end plate 211 can improve the reliability of the box body connected to the end plate 311, tighten the connection between the box body and the end plate 311 to maintain the upward arrangement angle. The bottom plate 321 and top plate 322 of the permanent dual-purpose steel anchor 300 at the middle tower end are rectangular plates, and the end plate 324 is a closed setting that does not shrink inward. The box of the permanent dual-purpose steel anchor 300 at the lower tower end is welded downward on the end plate 311, and its side plate 323 is not limited to regular plate surfaces such as parallelogram plates or rectangular plates, but can be an irregular plate surface composed of parallelogram plates and triangular plates. The irregular plate surface is not limited to a whole piece, but can be an assembled structure. Figures 2 to 4 The width of the perforated plate 312 on the lower portion of the end plate 311 is smaller than that of the perforated plate 312 in the upper region, and therefore, there are no through-holes 313 for inserting column reinforcement bars. Specifically, the distal end surface of the perforated plate 312 on the lower portion of the end plate 311 is closer to the end plate 311 than the distal end surface of the perforated plate 312 on the upper portion thereof. This is intended to allow the end plate 311 to be mounted on the support of the concrete tower column 100 via the lower portion of the end plate 311 and the lowest connecting plate 313.

[0042] Please refer to Figure 2 and Figure 4 To enhance the structural stability of the permanent and temporary steel anchor 300 at the tower end, the self-anchored suspension bridge tower end permanent and temporary steel anchor 300 provided in this embodiment of the present invention includes an inner web 327 parallel to the side panels 323 within the unenclosed housing. The upper and lower ends of the inner web 327 are connected to the top panel 322 and bottom panel 321, respectively, and the conduit 325 extends through the inner web 327. The inner web 327 also enhances the structural strength of the housing and effectively secures the conduit 325.

[0043] Please refer to Figure 2 and Figure 4 To improve the reliability of the connection of the diaphragm 324, the permanent and temporary dual-purpose steel anchor 300 for the tower end of a self-anchored suspension bridge provided in an embodiment of the present invention includes a permanent connection end 320 further including stiffening plates 328 welded between the diaphragm 324 and the top plate 322, bottom plate 321, and side plates 323. The stiffening plates 328 weld the diaphragm 324 to the bottom plate 321, top plate 322, and side plates 323.

[0044] Please refer to Figures 2 to 4 In order to facilitate the temporary cable to be pulled obliquely from the bridge deck and passed into the conduit 325 and detachably connected to the temporary connection part of the permanent connection end 320 of the tower end permanent and temporary dual-purpose steel anchor 300, the tower end permanent and temporary dual-purpose steel anchor 300 of the self-anchored suspension bridge provided by the embodiment of the present invention has the conduit 325 in an arc shape with one end high and the other end low. The high end of the conduit 325 is the exit end, and the low end of the conduit 325 is the entry end. The temporary cable is then passed from the entry end of the conduit 325 through the exit end and the anchor plate 326 and detachably connected to the anchor plate 326 through the anchor. Please refer to Figure 4 The guide tube 325 contains a steel strand splitting and steering structure to ensure that the temporary cable can be smoothly turned when the permanent and temporary dual-purpose steel anchor 300 at the tower end is at a low height. It is perpendicular to the anchor pad 326. One end of the temporary cable passes through the guide tube 325 of the permanent and temporary dual-purpose steel anchor 300 at the tower end and passes through the steel strand splitting and steering structure. After that, it extends out from the anchor pad 326 to complete the tensioning structure and can be detachably connected to the anchor. Please combine Figure 1The conduits 325 are arranged in a bidirectional cross pattern on the permanent and temporary dual-purpose steel anchor 300 at the tower end to ensure that the tension applied to the permanent connection end 320 of the permanent and temporary dual-purpose steel anchor 300 at the tower end is balanced after the temporary cable is tensioned.

[0045] Please refer to Figures 2 to 4 In order to improve the stability after connecting the temporary cables, the embodiment of the present invention provides a permanent and temporary dual-purpose steel anchor 300 at the tower end of a self-anchored suspension bridge. The top plate 322 is provided with several grouting holes 329 for pouring steel fiber concrete into the box body after welding the steel cross brace 200 to the permanent connection part.

[0046] The tower end permanent and temporary dual-purpose steel anchor 300 of the self-anchored suspension bridge provided by the embodiment of the present invention is cast on the concrete tower column 100 of the main tower of the self-anchored suspension bridge through the anchoring end 310 of the tower end permanent and temporary dual-purpose steel anchor 300, and extends out of the transverse direction of the concrete tower column 100 through the permanent connecting end 320 of the tower end permanent and temporary dual-purpose steel anchor 300, so that the dual-purpose connection functions of permanent connection with the steel cross brace 200 and temporary connection with the temporary cable are respectively realized through the permanent connecting end 320, which can avoid the erection of temporary cable towers on the concrete tower column 100, avoid the construction risk of temporary cable towers, save materials for constructing temporary cable towers, reduce the construction difficulty of connecting the steel cross brace 200 and the temporary cable on the main tower of the self-anchored suspension bridge, reduce the engineering cost of temporary cable buckle construction, and meet the demand for main cable replacement construction in the later operation stage of the self-anchored suspension bridge.

[0047] Please refer to Figures 6 to 9 and Figure 1 The present invention also provides a construction method for a main tower end structure 1 of a self-anchored suspension bridge, comprising:

[0048] Step 401, construct the concrete tower column 100 in sections, such as Figure 1 As shown in the concrete tower column 100 on the right side of the middle, the concrete tower column 100 is divided into several sections constructed from bottom to top.

[0049] Step 402: During the construction phase of the current concrete tower column 100, the bracket 120 is installed. To facilitate construction and reduce construction difficulty, the bracket 120 can be constructed in two steps. The bracket 120 is divided into two parts: a column 121 and a transverse frame 122. First, when the concrete of the current concrete tower column 110 is poured, the column 121 of the bracket 120 is embedded in the concrete. Second, after the concrete reaches the designed strength, the transverse frame 122 of the bracket 120 is welded to the column 121. Figure 6 、 Figure 7In order to ensure the structural stability of the support 120, the transverse frame 122 can be welded to the steel bars or rigid skeleton of the concrete tower column 100. The support 120 can also be split into a split structure of partial columns and a transverse frame with partial columns.

[0050] Step 403, hoist the tower end permanent dual-purpose steel anchor 300 onto the bracket 120, as shown in FIG. Figure 8 As shown. The tower-end permanent and temporary steel anchor 300 can be installed using a tower crane or other lifting equipment. The connecting plate below the tower-end permanent and temporary steel anchor 300 can be placed as a shelf on the crossbar 122 of the bracket 120, so that the end plate 311 is partially located below the bracket 120. This can be welded to the bracket 120 and the column reinforcement to improve the reliability of the tower-end permanent and temporary steel anchor 300 before concrete is poured.

[0051] Step 404: After adjusting the elevation of the permanent and temporary steel anchor 300 at the tower end using a jack (not shown), it is then tilt-welded to the bracket 120 using the tie rod 130. Adjusting the elevation of the permanent and temporary steel anchor 300 at the tower end using the jack ensures its height position to meet the connection accuracy requirements of the temporary cable and the steel cross brace 200. The tie rod 130 ensures the horizontal position of the permanent and temporary steel anchor 300 at the tower end, preventing displacement during concrete pouring and improving the anchoring quality and effect of the permanent and temporary steel anchor 300 at the tower end within the concrete tower column 100. When adjusting the elevation using the jack, a steel plate or steel section can be placed on the bracket 130 for leveling.

[0052] Step 405: Remove the jacks, pour the next section of concrete to form the next section of the concrete tower column 110, and anchor the anchoring end 310, the tie rod 130, and the bracket 120 of the tower end permanent and temporary dual-purpose steel anchor 300 in the next section of the concrete tower column 110, so that the permanent connection end 320 of the tower end permanent and temporary dual-purpose steel anchor 300 is located outside the concrete tower column 100 in the transverse direction, and the permanent connection ends 320 of the two concrete tower columns 100 of the same main tower are relatively distributed, as shown in FIG. Figure 9 and Figure 1 The pull rod 130 can ensure that the permanent and temporary dual-purpose steel anchor 300 at the tower end does not overturn.

[0053] Step 406, welding a steel cross brace 200 between two concrete columns 100 of the same main tower through a tower end permanent dual-purpose steel anchor 300, such as Figure 1 shown.

[0054] Step 407: pouring steel fiber concrete into the box through the grouting holes 329 on the top plate 322. By pouring steel fiber concrete of type C50, for example, into the grouting holes 329, the stability of the permanent and temporary steel anchor 300 at the tower end can be enhanced.

[0055] Step 408 : Connect temporary cables in two directions along the bridge through the temporary connection parts of the tower end permanent and temporary dual-purpose steel anchor 300 . That is, the temporary cables are inserted into the conduit 325 .

[0056] The embodiment of the present invention provides a tower end permanent dual-purpose steel anchor 300 of a self-anchored suspension bridge, a main tower end structure 1 and a construction method thereof, wherein the anchoring end 310 of the tower end permanent dual-purpose steel anchor 300 is set on the two concrete tower columns 100 of the main tower of the self-anchored suspension bridge, and the steel cross brace 200 of the fancy structure is connected to the tower end of the main tower through the tower end permanent dual-purpose steel anchor 300 and distributed on the two concrete tower columns 100 in the transverse direction of the bridge, thereby The connecting end 320 performs dual functions of permanent connection to the steel cross brace 200 and temporary connection to the temporary cable. This avoids the need to erect temporary cable towers on the concrete tower column 100, avoiding the construction risks of temporary cable towers, saving materials for temporary cable tower construction, and reducing the construction difficulty of connecting the steel cross brace 200 and the temporary cable on the main tower of the self-anchored suspension bridge. This reduces the construction cost of the temporary cable cable, while also meeting the need for main cable replacement construction in the later stages of the self-anchored suspension bridge's operation. Furthermore, the fancy-shaped steel cross brace 200 has good integrity and can improve the connection strength and stability between the two concrete tower columns 100. The fancy-shaped steel cross brace 200 resembles the shape of a Chinese knot, with multiple ends extending from both ends.

[0057] The embodiment of the present invention provides a permanent and temporary dual-purpose steel anchor 300 for the tower end of a self-anchored suspension bridge, a main tower end structure 1, and a construction method thereof. This structure can be used during both the construction and operation stages of the bridge to construct a temporary cable-stayed force balance system to complete the main beam installation and main cable replacement.

[0058] The present invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only some embodiments of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention described, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge, characterized in that: The tower end permanent and temporary dual-purpose steel anchor comprises an anchor end cast in the concrete tower column and a permanent connection end exposed outside the transverse direction of the concrete tower column for permanent connection with a steel cross brace between two concrete tower columns distributed in the transverse direction of the same main tower and for temporary connection with a temporary cable.

2. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 1 is characterized in that: The anchoring end comprises a vertically arranged end plate, and a plurality of spaced open plates vertically arranged on one side of the end plate, wherein the open plates are provided with through holes for passing through the column reinforcement of the concrete tower column.

3. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 2 is characterized in that: Shear nails are arranged on both sides of the perforated plates, and connecting plates are vertically arranged between adjacent perforated plates.

4. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 2 is characterized in that: The temporary connection end comprises a box body with open ends composed of a bottom plate, a top plate and two side plates, one open end of the box body is arranged at an angle on the end plate, and the other open end of the box body is retracted or closed with a partition, and the partition forms a permanent connection part for connecting the steel cross brace with the bottom plate, top plate and side plate at the end where it is located, and the box body is bidirectionally penetrated from one side plate to the other side plate with multiple conduits for passing temporary buckle cables, one end of the conduit is an entry end, and the other end is an exit end, and the exit end is provided with an anchor plate attached to the side plate on the side, and the end of the anchor plate away from the side plate is a temporary connection part of the temporary buckle cable.

5. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 4 is characterized in that: An inner web parallel to the side panels is arranged in the unclosed box body, the upper and lower ends of the inner web are respectively connected to the top panel and the bottom panel, and the conduit passes through the inner web.

6. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 4, characterized in that: The permanent connection end also includes stiffening plates respectively welded between the partition plate and the top plate, the bottom plate and the side plates.

7. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 4, characterized in that: The conduit is in an arc shape with one end being high and the other end being low. The high end of the conduit is the outlet end, and the low end of the conduit is the inlet end.

8. The permanent and temporary dual-purpose steel anchor for the tower end of a self-anchored suspension bridge according to claim 4, characterized in that: The top plate is provided with a plurality of grouting holes for pouring steel fiber concrete into the box body after the steel cross brace is welded to the permanent connection part.

9. A main tower end structure of a self-anchored suspension bridge, characterized in that: It comprises two concrete tower columns distributed in the transverse direction of the bridge on the tower ends of each main tower of the self-anchored suspension bridge, and a steel cross brace symmetrically anchored between the two concrete tower columns, each end of the steel cross brace is set on the concrete tower column by a tower end permanent and temporary dual-purpose steel anchor piece according to any one of claims 1 to 8, and the steel cross brace is a fancy structure composed of steel sections cross-distributed in the same plane.

10. A construction method for the main tower end structure of a self-anchored suspension bridge according to claim 9, characterized in that: include: Construct the concrete tower column in sections; In the current section of the concrete tower column construction stage, the bracket is embedded; Hoist the permanent and temporary dual-purpose steel anchors at the tower end onto the bracket; Adjust the elevation position of the permanent dual-purpose steel anchor at the tower end by using a jack, and then weld it to the bracket by tilting the tie rod; Remove the jack, pour the next section of concrete to form the next section of concrete tower column, and anchor the anchor end of the permanent and temporary dual-purpose steel anchor piece at the tower end, the tie rod and the bracket in the next section of concrete tower column, so that the permanent connection end of the permanent and temporary dual-purpose steel anchor piece at the tower end is located in the transverse direction and extends outside the concrete tower column, and the permanent connection ends between the two concrete tower columns of the same main tower are relatively distributed; Steel cross braces are welded between two concrete columns of the same main tower through permanent and temporary dual-purpose steel anchors at the tower ends; Pour steel fiber concrete into the box through the grouting holes on the top plate; Temporary cables are connected in two directions along the bridge through temporary connection parts in each direction of the permanent and temporary dual-purpose steel anchors at the tower end.

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