Separated catwalk tower top anchoring structure

Abstract

The utility model discloses a separated catwalk tower top anchoring structure which comprises a left anchor box and a right anchor box. The left anchor box comprises a bottom plate, a top plate, webs and lug plates, the bottom plate is connected to the top plate through the webs, and the lug plates are connected to the top plate; the right anchor box and the left anchor box are structurally symmetrical; a bottom plate of the left anchor box is anchored to the left side face of the tower top, a bottom plate of the right anchor box is anchored to the right side face of the tower top, and the left anchor box is further connected to the right anchor box through a pre-stressed anchor cable. The device has the advantages that the left anchor box and the right anchor box are anchored to the two sides of the tower top respectively and connected with each other through the pre-stressed anchor cables, and the anchoring structure is more stable; when the left side face and the right side face of the tower top are inclined faces, the bottom plates of the anchor boxes are attached to the inclined faces, the two ends of the pre-stressed anchor cables are connected to the top plates of the left anchor box and the right anchor box respectively, and therefore it is guaranteed that the anchoring structure is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the main cable construction technology field of suspension bridge, and particularly relates to a separated catwalk tower top anchoring structure. BACKGROUND

[0002] The catwalk is a flexible steel wire structure, and is usually composed of load bearing cables, handrail cables, portal support cables, falling prevention nets and footpath grating, etc.

[0003] The catwalk is generally anchored at the main tower turning or anchoring, and at the spreader saddle support pier / complex spreader saddle support pier. According to whether a load bearing cable can be continuous at the main tower, the catwalk can be divided into a continuous catwalk and a separated catwalk, and the two catwalks only differ at the top of the main tower.

[0004] The continuous catwalk turns through at the top of the main tower, and the turning saddle is arranged on the tower top concrete, and a turning saddle embedded part needs to be arranged on the tower top concrete. The operation space at the top of the part of the bridge tower is small, and the turning saddle embedded part cannot be embedded.

[0005] The separated catwalk is usually anchored at both sides of the top of the main tower, and is anchored through a rigid pull rod or a pre-embedded anchoring part to provide a transverse pulling force, is suitable for smaller bridges, and has higher requirements for the stability and safety of the anchoring part.

[0006] In addition, the surface of the bridge tower concrete is no longer a vertical surface when the structure is considered in the design. Therefore, when the separated catwalk is anchored, the inclined angle of the surface of the bridge tower needs to be considered to ensure the safety of the structure. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at providing a separated catwalk tower top anchoring structure.

[0008] The technical scheme for realizing the utility model is as follows:

[0009] A separated catwalk tower top anchoring structure, comprising left and right anchor boxes; the left anchor box comprises a bottom plate, a top plate, a web plate and an ear plate, the bottom plate is connected to the top plate through the web plate, and the ear plate is connected to the top plate; the right anchor box is symmetrical with the left anchor box in structure; the bottom plate of the left anchor box is anchored to the left side surface of the tower top, the bottom plate of the right anchor box is anchored to the right side surface of the tower top, and the left anchor box is further connected to the right anchor box through a prestressed anchor cable.

[0010] Further, the left and right side faces of the tower top are inclined faces, and the left and right side faces of the tower top are symmetrical; the bottom plate of the left anchor box is attached to the left side face of the tower top, and the top plate of the left anchor box is vertical; the bottom plate of the right anchor box is attached to the right side face of the tower top, and the top plate of the right anchor box is vertical; the left anchor box is further connected to the right anchor box through a prestressed anchor cable, specifically: the tower top is provided with a prestressed anchor cable channel, and the bottom plate and the top plate of the left and right anchor boxes are provided with anchor holes; the prestressed anchor cable passes through the anchor holes of the top plate of the left anchor box, the anchor holes of the bottom plate of the left anchor box, the prestressed anchor cable channel, the anchor holes of the bottom plate of the right anchor box and the anchor holes of the top plate of the right anchor box in sequence, and the left end is fixedly connected to the outside of the top plate of the left anchor box through a left gasket and a left clamping piece, and the right end is fixedly connected to the outside of the top plate of the right anchor box through a right gasket and a right clamping piece.

[0011] Preferably, the ear plates of the left and right anchor boxes are arranged in the same horizontal plane as the prestressed anchor cable.

[0012] Preferably, the left and right side faces of the tower top are inclined faces that are inclined inward from top to bottom; further comprising a left anchor box bracket and a right anchor box bracket symmetrical to the structure thereof; the left and right anchor box brackets are used for supporting the left and right anchor boxes, respectively.

[0013] Preferably, the prestressed anchor cable is further sleeved with a corrugated pipe.

[0014] Preferably, the prestressed anchor cable is further sleeved with a spiral rib.

[0015] The utility model discloses the beneficial effect lies in:

[0016] 1, left and right anchor boxes are anchored to the two sides of the tower top respectively, and are further connected to each other through a prestressed anchor cable, so that the anchoring structure is more stable.

[0017] 2, when the left and right side faces of the tower top are inclined faces, the bottom plate of the anchor box is attached to the inclined face, and the two ends of the prestressed anchor cable are connected to the top plates of the left and right anchor boxes respectively, so as to ensure the stability of the anchoring structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the suspension bridge adopting the utility model.

[0019] Figure 2 It is a whole front view of the tower top anchoring structure embodiment.

[0020] Figure 3 It is a right side partial front view of the tower top anchoring structure embodiment.

[0021] Figure 4 It is a whole plan view of the tower top anchoring structure embodiment.

[0022] Figure 5 It is a schematic view of the connection between the prestressed anchor cable and the left and right anchor boxes in the tower top anchoring structure embodiment (the ear plate is not shown in the figure).

[0023] Figure 6 is a left anchor box front view for a tower top anchorage structure embodiment.

[0024] Figure 7 is a left anchor box left view for a tower top anchorage structure embodiment.

[0025] Figure 8 is an anchor box connector front view.

[0026] Figure 9 is an anchor box connector top view.

[0027] Figure 10 is a right anchor box bracket front view for a tower top anchorage structure embodiment.

[0028] Figure 11 is an anchor cone schematic view used for a tower top anchorage structure embodiment.

[0029] Figure 12 is an anchorage bracket schematic view used for a tower top anchorage structure embodiment.

[0030] Figure 13 is a bearing cable top view.

[0031] Figure 14 is a bearing cable front view.

[0032] Figure 15 is a wire rope clamp schematic view.

[0033] The figures are marked as follows:

[0034] 1 prestressed anchor cable, 2 anchor box, 3 anchor box connector, 4 anchor box bracket, 5 catwalk bearing cable, 6 anchor box, 7 clamp piece, 8 gasket, 9 cable, 10 corrugated pipe, 11 spiral rib, 12 bridge tower, 13 top plate, 14 bottom plate, 15 web plate, 16 ear plate, 17 opposite connection plate, 18 one-way connection plate, 19 anchor box connector side web plate, 20 anchor box connector web plate, 21 anchoring piece, 22 anchorage bracket, 23 shackle, 24 wire rope clamp, 25 embedded piece plate, 26 high-strength screw rod, 27 climbing cone, 28 bolt, 29 anchorage bracket bottom plate. DETAILED DESCRIPTION

[0035] The application is further described in detail below in conjunction with the drawings and embodiments.

[0036] As Figure 1 , a suspension bridge using the present utility model, the bridge is a single tower self-anchored suspension bridge, the bridge tower adopts a single column shape, and the overall side surface of the bridge tower is a curved surface.

[0037] EMBODIMENT

[0038] As Figure 2 ,Figure 3 、 Figure 4 As shown in the figure, the embodiment is a catwalk tower top anchoring structure suitable for a special-shaped bridge tower, which comprises prestressed anchor cables 1, tower top anchor boxes 2 suitable for the special-shaped bridge tower, tower top anchor box connecting pieces 3 matched with the tower top anchor boxes, and tower top anchor box brackets 4 providing vertical support force for the tower top anchor boxes 2.

[0039] In the embodiment, the prestressed anchor cables 1 are used to connect the left and right tower top anchor boxes. In a conventional structure, a rigid pull rod structure such as a fine rolled threaded steel is usually used for connection. When subjected to tension, the rod member is elastically deformed, a gap is generated between the tower top anchor box and the tower surface, and the tower top anchor box cannot provide sufficient friction force to offset the tension of the load-bearing cable. The prestressed anchor cables 1 are used in a prestressed manner. Before the prestress is used up, the structure does not produce additional elastic deformation when subjected to tension, ensuring that the tower top anchor box can effectively contact the bridge tower surface and that there is sufficient friction force between the tower top anchor box and the bridge tower surface. At the same time, the fine rolled threaded steel has weak shear resistance. When used, the fine rolled threaded steel may be sheared and broken due to uneven stress of the structure and other factors. The prestressed anchor cables 1 have strong shear resistance and are safer in actual use.

[0040] The arrangement of the prestressed anchor cables 1 and the tower top anchor boxes is shown in the figure. Figure 5 The prestressed anchor cables 1 pass through the anchor holes of the top plates of the left anchor boxes, the anchor holes of the bottom plates of the left anchor boxes, the prestressed anchor cable channels, the anchor holes of the bottom plates of the right anchor boxes, and the anchor holes of the top plates of the right anchor boxes in sequence, are fixedly connected to the outer sides of the top plates of the left anchor boxes through left gaskets and left clamping pieces, and are fixedly connected to the outer sides of the top plates of the right anchor boxes through right gaskets and right clamping pieces. In the embodiment, the anchoring positions of the prestressed anchor cables 1 pass through the anchor boxes and are supported by the top plates 13 of the anchor boxes. Compared with the conventional anchoring on the bottom plates 14 of the anchor boxes, the prestressed anchor cables 1 optimize the stress characteristics of the structure, reduce the generation of structural bending moments, reduce the generation of local pressure of the anchor boxes on the bridge tower structure, and reduce the damage to the surface of the bridge tower. The prestressed anchor cables 1 are also provided with bellows 10 and spiral ribs 11. The bellows 10 protect the prestressed anchor cables 1 from corrosion and mechanical damage, ensure that the prestressed anchor cables 1 can freely elongate during tensioning, and facilitate the pouring of anticorrosive protective materials. The spiral ribs 11 generate friction with the tower top concrete, effectively improving the anchoring strength of the anchoring points.

[0041] As shown in the figure, Figure 5 、 Figure 6 In the embodiment, the ear plates 16 of the anchor boxes are at the same horizontal plane as the positions of the prestressed anchor cables 1, so that the anchoring structure does not generate additional bending moment when subjected to stress, optimizes the force transmission mode, and improves the stress performance of the overall structure.

[0042] As shown in the figure, Figure 6 、 Figure 7As shown, the bottom plate 14 of the anchor box is adjusted according to the actual bridge tower shape, the whole tower top anchor box is attached to the surface of the bridge tower, and the anchor box provides an anchoring position for the prestressed anchor cable 1.

[0043] In this embodiment, since the tower top side surface is inclined inward from top to bottom, the anchor box bracket 4 is added as an additional support to ensure the structural safety.

[0044] As shown in Figure 4 , Figure 8 In this embodiment, the anchor box connecting piece 3 is provided with the opposite connecting plate 17 to connect the tower top anchor box with the catwalk load-bearing cable 5, and the opposite connecting plate 17 and the one-way connecting plate 18 to connect the anchor box connecting piece 3 with the shackle 23, and the shackle 23 is connected with the catwalk load-bearing cable 5.

[0045] As shown in Figure 9 In this embodiment, two opposite connecting plates 17 and four one-way connecting plates 18 are provided for the anchor box connecting piece 3. The anchor box connecting piece web plate 20 penetrates through the opposite connecting plate 17 and the one-way connecting plate 18 as a whole and is welded into one body. The anchor box connecting piece side web plate 19 is welded on both sides of the anchor box connecting piece web plate 20 to provide support and stability for the structure.

[0046] The anchor box bracket 4 is shown in Figure 10 In this embodiment, the anchor cone structure is embedded in the bridge tower in advance. The anchor cone has strong shear resistance, which is more conducive to resisting the sliding of the tower top anchor box. The anchor cone structure of this embodiment is shown in Figure 11 The anchor cone structure is provided with a main anchoring force by the embedded part plate 25, the high-strength screw rod 26 transmits the anchoring force, the climbing cone 27 is used as a connecting piece, and the inside is provided with threads to connect the high-strength screw rod 26 and the bolt 28. The anchor bracket is shown in Figure 12 The anchor bracket bottom plate 29 is provided with an anchoring hole, and the bolt 28 penetrates through the anchoring hole and is anchored and connected through the climbing cone 27.

[0047] The anchor 21 is not limited to the anchor cone structure, and the anchor 21 needs to bear a large shear stress load.

[0048] As shown in Figure 13 In this embodiment, the catwalk load-bearing cable 5 is connected with the anchor box connecting piece 3 through the shackle 23.

[0049] As shown in Figure 14 The catwalk load-bearing cable 5 is surrounded to form a connecting hole and is fixed by the steel wire rope clamp 24.

Claims

1. A split catwalk tower anchoring structure, characterized by, The left anchor box comprises a bottom plate (14), a top plate (13), a web plate (15) and an ear plate (16), the bottom plate (14) is connected to the top plate (13) through the web plate (15), and the ear plate (16) is connected to the top plate; the right anchor box is symmetrical with the left anchor box in structure; the bottom plate (14) of the left anchor box is anchored to the left side surface of the tower top, the bottom plate (14) of the right anchor box is anchored to the right side surface of the tower top, and the left anchor box is further connected to the right anchor box through a prestressed anchor cable (1).

2. The split catwalk tower anchoring structure of claim 1, wherein, The left and right side surfaces of the tower top are both inclined surfaces, and the left and right side surfaces of the tower top are symmetrical; the bottom plate (14) of the left anchor box is attached to the left side surface of the tower top, and the top plate of the left anchor box is perpendicular; the bottom plate of the right anchor box is attached to the right side surface of the tower top, and the top plate of the right anchor box is perpendicular; The left anchor box is further connected to the right anchor box through the prestressed anchor cable (1), specifically, the tower top is provided with a prestressed anchor cable channel, the bottom plate and the top plate of the left and right anchor boxes are both provided with anchor holes; the prestressed anchor cable (1) passes through the anchor holes of the top plate of the left anchor box, the anchor holes of the bottom plate of the left anchor box, the prestressed anchor cable channel, the anchor holes of the bottom plate of the right anchor box and the anchor holes of the top plate of the right anchor box in sequence, and the left end is fixedly connected to the outer side of the top plate of the left anchor box through a left gasket (8) and a left clamping piece (7), and the right end is fixedly connected to the outer side of the top plate of the right anchor box through a right gasket and a right clamping piece.

3. The split catwalk tower anchoring structure of claim 2, wherein, The center hole of the ear plate of the left and right anchor boxes is located in the same horizontal plane as the prestressed anchor cable (1).

4. The split catwalk tower anchoring structure of claim 2, wherein, The left and right side surfaces of the tower top are both inclined surfaces that are inclined inward from top to bottom; further comprising a left anchor box bracket and a right anchor box bracket (4) symmetrical with the left anchor box bracket in structure; the left and right anchor box brackets are respectively used for supporting the left and right anchor boxes.

5. The split catwalk tower anchoring structure of claim 2, wherein, The prestressed anchor cable (1) is further sleeved with a corrugated pipe (10).

6. The split catwalk tower anchoring structure of claim 2, wherein, The prestressed anchor cable (1) is further sleeved with a spiral rib (11).

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