Common anchorage for suspension bridge

Abstract

The present invention discloses a common anchorage for a suspension bridge, comprising a cap, on which a first anchor body and a second anchor body are symmetrically arranged in the transverse direction of the bridge, anchor chambers are arranged in the middle of the tops of the first anchor body and the second anchor body, first loose cable saddles and second loose cable saddles are arranged on both sides of the anchor chamber along the bridge direction, and a plurality of staggered and dispersed anchor cables are anchored between the first loose cable saddle and the second loose cable saddle and the anchor chamber. The present invention adopts a "transverse separation, longitudinal opening" structural form, which has a simple and beautiful shape, greatly reduces the wind resistance and water resistance area of ​​the anchor body, and reduces the radar wave interference effect of the large-volume concrete anchor pier side on the marine vessel; at the same time, the volume of the anchor body is greatly reduced, saving engineering usage.

Description

Technical Field

[0001] The invention belongs to the technical field of bridges, and in particular relates to a common anchorage for a suspension bridge. Background Art

[0002] With the continuous development of national highway and railway construction and technological progress, the number and demand of long-span bridges are increasing. Among them, suspension bridges are the bridge type with the strongest spanning capacity. For bridges with large spans or continuous span requirements, and when the design load is large, the current conventional domestic suspension bridges are difficult to apply due to stiffness problems or engineering costs. When a multi-tower suspension bridge is used, the problems of middle tower stiffness and main cable anti-slip are more prominent. Among them, the method of connecting multiple suspension bridges with shared anchors may become the preferred bridge type due to its advantages of super spanning capacity, suitable stiffness, and perfect shape. However, this type of bridge is less used in China, and its shared anchor is the key structure of this type of bridge.

[0003] In the prior art, the Chinese utility model patent with application number CN201621483482.1 discloses a suspension bridge pier type prestressed anchorage, which includes a steel structure concrete cap, a steel pipe pile group, a prestressed anchor cable group, a main cable and a main cable anchoring system, one end of the steel pipe pile group extends into the bedrock, and the other end is rigidly connected to the bottom surface of the steel structure concrete cap, the main cable anchoring system is arranged on the upper surface of the steel structure concrete cap, the inner anchor head end of the anchor cable of the prestressed anchor cable group is fixed in the bedrock, and the outer anchor head end of the anchor cable of the prestressed anchor cable group is fixedly connected to the steel structure concrete cap. Although the above scheme transmits the huge tension of the main cable to the bedrock through the prestressed anchor cable group, thereby increasing the bearing range of the anchorage structure, due to the low rigidity and limited bearing capacity of the steel pipe pile group, it is easy to slip, and the structural stability is poor. Therefore, it is necessary to study a common anchorage with reasonable force, convenient construction, good economy and beautiful appearance, so as to improve the competitiveness of this type of bridge and solve the technical problems of the above-mentioned large-span bridges. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a common anchorage for a suspension bridge with reasonable force and convenient construction.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a common anchorage for a suspension bridge, including a pedestal, on which a first anchor body and a second anchor body are symmetrically arranged along the transverse direction of the bridge, anchor chambers are arranged in the middle of the tops of the first anchor body and the second anchor body, and first loose cable saddles and second loose cable saddles are respectively arranged on both sides of the anchor chambers along the bridge direction, and a plurality of staggered and dispersed anchor cables are anchored between the first loose cable saddle and the second loose cable saddle and the anchor chambers.

[0006] In the above technical solution, the anchor chamber includes a first anchoring slope and a second anchoring slope, the first anchoring slope and the second anchoring slope form a V-shaped hollow structure opening upward, the first loose cable saddle and the first anchoring slope are located on one side of the anchor chamber along the bridge direction, and the second loose cable saddle and the second anchoring slope are located on the other side of the anchor chamber along the bridge direction;

[0007] A plurality of anchor cables are anchored between the first loose cable saddle and the second anchoring slope, one end of the plurality of anchor cables are gathered to form a main cable that passes through the first loose cable saddle and is fixedly connected thereto, and the other ends of the plurality of anchor cables are dispersedly anchored on the second anchoring slope;

[0008] A plurality of anchor cables are anchored between the second loose-cable saddle and the first anchoring slope. One ends of the plurality of anchor cables are gathered to form a main cable that passes through the second loose-cable saddle and is fixedly connected thereto. The other ends of the plurality of anchor cables are dispersedly anchored on the first anchoring slope and are staggered with the anchor cables on the other side.

[0009] In the above technical solution, the first loose cable saddle and the second loose cable saddle are staggered along the bridge direction, and the bottoms of the first loose cable saddle and the second loose cable saddle are both provided with loose cable saddle piers, and the loose cable saddle piers are fixedly connected to the top surfaces of the first anchor body and the second anchor body.

[0010] In the above technical solution, a crossbeam arranged along the bridge direction for supporting the stiffening beam is provided between the anchor chamber of the first anchor body and the anchor chamber of the second anchor body, and both ends of the crossbeam are fixedly connected to the inner cavity bottom of the anchor chamber through piers.

[0011] In the above technical solution, both sides of the first anchor body and the second anchor body along the bridge direction are provided with corbels for supporting the stiffening beam.

[0012] In the above technical solution, stiffening beam supports are provided on the cross beam and the corbel.

[0013] In the above technical solution, an arched hole is provided in the middle of the bottom of each of the first anchor body and the second anchor body.

[0014] In the above technical solution, a connecting beam arranged along the transverse direction of the bridge is provided between the first anchor body and the second anchor body.

[0015] In the above technical solution, an arc-shaped hole opening upward is provided on the upper portion of the connecting beam.

[0016] In the above technical solution, the foundation, the first anchor body and the second anchor body are all reinforced concrete structures.

[0017] The beneficial effects of the present invention are:

[0018] Firstly, the present invention symmetrically designs the first anchor body and the second anchor body structure on the pedestal along the transverse direction of the bridge, which has high rigidity, good stability, safety and reliability, simple and beautiful appearance, and cheap reinforced concrete structure, which greatly reduces the engineering cost of series-type suspension bridges, improves the competitiveness of connected-span suspension bridges, and provides a reference for a new structural form for the design of shared anchors, which is a structural form worthy of wide promotion.

[0019] Secondly, the first anchor body and the second anchor body of the present invention adopt a "lateral separation, longitudinal opening" structure, which has a simple and beautiful shape, greatly reduces the wind resistance and water resistance area of ​​the anchor body, and reduces the radar wave interference of the side of the large-volume concrete anchor pier to the ships at sea; at the same time, it greatly reduces the volume of the anchor body and saves engineering workload.

[0020] Thirdly, the main cable strands of the present invention adopt the method of "scattering cables and then staggered anchoring", which compresses the longitudinal space of the anchor structure, further reduces the volume of the anchor body and the foundation, saves engineering workload, and meets the anchoring requirements of the main cable. The structure is safe in force, and the force transmission is reasonable and reliable, which better realizes the series connection of the suspension bridge.

[0021] Fourthly, the structural space of the present invention is reasonably arranged, the main cable strands have sufficient space for spreading, the cable saddle anchoring position and activity space are appropriate, the construction accessibility is good, and it is beneficial to the corrosion protection of the main cable strands and the anchoring structure. The later dehumidification and maintenance costs are low and the maintenance is convenient.

[0022] Fifthly, the present invention arranges a suitable stiffening beam supporting structure system in the common anchoring area, realizes a smooth transition of the stiffening beam, and provides better driving conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the common anchorage of the suspension bridge of the present invention;

[0024] Figure 2 for Figure 1 The structural schematic diagram of the common anchorage of the suspension bridge along the longitudinal direction of the bridge is shown;

[0025] Figure 3 for Figure 1 The structural schematic diagram of the common anchorage of the suspension bridge along the transverse direction of the bridge is shown;

[0026] In the figure: 1-cap, 2-first anchor body, 3-second anchor body, 4-anchor chamber, 4.1-first anchoring slope, 4.2-second anchoring slope, 5-first loose cable saddle, 6-second loose cable saddle, 7-anchor cable, 8-loose cable saddle pier, 9-cross beam, 10-pier, 11-corbel, 12-stiffening beam support, 13-arch hole, 14-connecting beam, 15-arc hole. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0028] like Figure 1 The suspension bridge shown in the figure has a common anchorage, including a cap 1, on which a first anchor body 2 and a second anchor body 3 are symmetrically arranged along the transverse direction of the bridge. The cap 1, the first anchor body 2 and the second anchor body 3 are all reinforced concrete structures. The first anchor body and the second anchor body adopt a "transverse separation and longitudinal opening" structure, which is simple and beautiful in shape; the wind resistance and water resistance area of ​​the anchor body are greatly reduced, and the radar wave interference effect of the large-volume concrete anchor pier side on the ships at sea is reduced; at the same time, the volume of the anchor body is greatly reduced, saving engineering consumption. Anchor chambers 4 are arranged in the middle of the tops of the first anchor body 2 and the second anchor body 3, and the first loose cable saddle 5 and the second loose cable saddle 6 are respectively arranged on both sides of the anchor chamber 4 along the bridge direction. A plurality of staggered and dispersed anchor cables 7 are anchored between the first loose cable saddle 5 and the second loose cable saddle 6 and the anchor chamber 4. The first cable saddle 5 and the second cable saddle 6 are staggered along the bridge direction. The bottoms of the first cable saddle 5 and the second cable saddle 6 are both provided with cable saddle buttresses 8, which are fixedly connected to the top surfaces of the first anchor body 2 and the second anchor body 3. The structural space is reasonably arranged, the main cable strand cable space is sufficient, the cable saddle anchoring position and activity space are appropriate, and the construction accessibility is good. In addition, the space is compact, which is conducive to the corrosion protection of the main cable strand and the anchor structure, the later dehumidification maintenance cost is low, and the maintenance is convenient.

[0029] like Figure 2 As shown, the anchor chamber 4 includes a first anchoring slope 4.1 and a second anchoring slope 4.2, and the first anchoring slope 4.1 and the second anchoring slope 4.2 form a hollow structure with an upward opening in a V shape, the first loose cable saddle 5 and the first anchoring slope 4.1 are located on one side of the anchor chamber 4 along the bridge direction, and the second loose cable saddle 6 and the second anchoring slope 4.2 are located on the other side of the anchor chamber 4 along the bridge direction; a plurality of anchor cables 7 are anchored between the first loose cable saddle 5 and the second anchoring slope 4.2, one ends of the plurality of anchor cables 7 are gathered to form a main cable that passes through the first loose cable saddle 5 and is fixedly connected thereto, and the other ends of the plurality of anchor cables 7 are dispersedly anchored on the second anchoring slope 4.2; a plurality of anchor cables 7 are anchored between the second loose cable saddle 6 and the first anchoring slope 4.1, one ends of the plurality of anchor cables 7 are gathered to form a main cable that passes through the second loose cable saddle 6 and is fixedly connected thereto, and the other ends of the plurality of anchor cables 7 are dispersedly anchored on the first anchoring slope 4.1, and are staggered with the anchor cables 7 on the other side. The main cable strands adopt the method of "scattering cables and then staggered anchoring", which compresses the longitudinal space of the anchor structure, further reduces the volume of the anchor body and foundation, saves engineering workload, and meets the anchoring requirements of the main cable. The structure is safe in stress and the force transmission is reasonable and reliable, which better realizes the series connection of the suspension bridge.

[0030] like Figure 3As shown, a cross beam 9 for supporting a stiffening beam arranged along the bridge direction is provided between the anchor chamber 4 of the first anchor body 2 and the anchor chamber 4 of the second anchor body 3, and both ends of the cross beam 9 are fixedly connected to the bottom of the inner cavity of the anchor chamber 4 through piers 10. Corbels 11 for supporting stiffening beams are provided on both sides of the first anchor body 2 and the second anchor body 3 along the bridge direction, and stiffening beam supports 12 are provided on the cross beam 9 and the corbel 11. A suitable stiffening beam support structure system is provided in the common anchoring area, so as to realize a smooth transition of the stiffening beam and provide better driving conditions. An arched hole 13 is provided in the middle of the bottom of the first anchor body 2 and the second anchor body 3. A connecting beam 14 arranged along the transverse bridge direction is provided between the first anchor body 2 and the second anchor body 3. An arc-shaped hole 15 with an opening facing upward is provided on the upper part of the connecting beam 14. The invention has a safe and reliable structure, good economic benefits, and a simple and beautiful shape. It greatly reduces the engineering cost of series-type suspension bridges, improves the competitiveness of connected-span suspension bridges, and provides a reference for a new structural form for the design of shared anchorages. It is a structural form worthy of wide promotion.

[0031] The above are only specific embodiments of the present invention. It should be pointed out that the rest that are not described in detail are prior arts. Any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A common anchorage for a suspension bridge, comprising a cap (1), characterized in that: A first anchor body (2) and a second anchor body (3) are symmetrically arranged on the support platform (1) along the transverse direction of the bridge, and an anchor chamber (4) is arranged in the middle of the top of the first anchor body (2) and the second anchor body (3). A first loose cable saddle (5) and a second loose cable saddle (6) are respectively arranged on both sides of the anchor chamber (4) along the bridge direction, and a plurality of staggered and dispersed anchor cables (7) are anchored between the first loose cable saddle (5) and the second loose cable saddle (6) and the anchor chamber (4).

2. The common anchorage for suspension bridge according to claim 1, characterized in that: The anchor chamber (4) comprises a first anchoring slope (4.1) and a second anchoring slope (4.2), wherein the first anchoring slope (4.1) and the second anchoring slope (4.2) form a hollow structure that opens upward and is V-shaped, the first loose cable saddle (5) and the first anchoring slope (4.1) are located on one side of the anchor chamber (4) along the bridge direction, and the second loose cable saddle (6) and the second anchoring slope (4.2) are located on the other side of the anchor chamber (4) along the bridge direction; A plurality of anchor cables (7) are anchored between the first loose cable saddle (5) and the second anchoring inclined surface (4.2); one end of the plurality of anchor cables (7) is gathered to form a main cable that passes through the first loose cable saddle (5) and is fixedly connected thereto; the other ends of the plurality of anchor cables (7) are dispersedly anchored on the second anchoring inclined surface (4.2); A plurality of anchor cables (7) are anchored between the second loose cable saddle (6) and the first anchoring slope (4.1); one ends of the plurality of anchor cables (7) are gathered to form a main cable that passes through the second loose cable saddle (6) and is fixedly connected thereto; the other ends of the plurality of anchor cables (7) are dispersedly anchored on the first anchoring slope (4.1) and are arranged in a staggered manner with the anchor cables (7) on the other side.

3. The common anchorage for suspension bridge according to claim 2, characterized in that: The first loose cable saddle (5) and the second loose cable saddle (6) are staggeredly arranged along the longitudinal direction of the bridge. The bottoms of the first loose cable saddle (5) and the second loose cable saddle (6) are both provided with loose cable saddle buttresses (8), and the loose cable saddle buttresses (8) are fixedly connected to the top surfaces of the first anchor body (2) and the second anchor body (3).

4. The common anchorage for suspension bridge according to claim 1, 2 or 3, characterized in that: A crossbeam (9) arranged along the bridge direction and used to support the stiffening beam is provided between the anchor chamber (4) of the first anchor body (2) and the anchor chamber (4) of the second anchor body (3), and both ends of the crossbeam (9) are fixedly connected to the bottom of the inner cavity of the anchor chamber (4) through piers (10).

5. The common anchorage for suspension bridge according to claim 4, characterized in that: Both sides of the first anchor body (2) and the second anchor body (3) along the bridge direction are provided with brackets (11) for supporting stiffening beams.

6. The common anchorage for suspension bridge according to claim 5, characterized in that: Stiffening beam supports (12) are provided on the cross beam (9) and the corbel (11).

7. The common anchorage for suspension bridge according to claim 1, 2 or 3, characterized in that: An arched hole (13) is provided in the middle of the bottom of each of the first anchor body (2) and the second anchor body (3).

8. The common anchorage for suspension bridge according to claim 1, 2 or 3, characterized in that: A connecting beam (14) arranged along the transverse direction is provided between the first anchor body (2) and the second anchor body (3).

9. The common anchorage for suspension bridge according to claim 8, characterized in that: An arc-shaped hole (15) opening upward is formed on the upper part of the connecting beam (14).

10. The common anchorage for suspension bridge according to claim 1, 2 or 3, characterized in that: The cap (1), the first anchor body (2) and the second anchor body (3) are all reinforced concrete structures.

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