Anchoring cable saddle and steel strand cable for cable-stayed bridge

Abstract

The application discloses an anchoring cable saddle and steel strand cable for a cable-stayed bridge, which comprises a steel sleeve, a first cable saddle base plate, a second cable saddle base plate and a turning saddle arranged in the steel sleeve. The steel sleeve penetrates through both sides of a cable tower, and the outer wall of the steel sleeve is fixedly connected with the cable tower. The turning saddle comprises a hole for penetrating a steel strand, and the first cable saddle base plate and the second cable saddle base plate are fixedly connected with the axis of the two end ports of the hole perpendicularly. The first cable saddle base plate and the second cable saddle base plate are provided with corresponding steel strand through holes. The outer periphery of the first cable saddle base plate and the second cable saddle base plate is fixedly connected with the inner wall of the steel sleeve respectively. High-strength mortar is further filled between the first cable saddle base plate and the second cable saddle base plate. The anchoring cable saddle and steel strand cable for the cable-stayed bridge can avoid the cable tower from being provided with a tooth-shaped groove, improve the rigidity and structural strength of the cable tower and improve the viewing effect of the cable tower.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable-stayed bridge cable saddle, in particular to an anchoring cable saddle for cable-stayed bridge and steel strand cable. BACKGROUND

[0002] At present, steel strand cable with cable saddle is often used in some cable-stayed bridges or low tower cable-stayed bridges. The cable saddle is pre-buried in the cable tower of the cable-stayed bridge. Since the cable saddle has a certain curvature, the stay cable needs to be coaxial with the cable saddle at the outlet of the cable saddle. Therefore, the cable saddle pad for bearing the prestress of the steel strand inside the cable saddle needs a certain inclination angle. The existing technology is fixed in the idea of "opening a tooth-shaped groove in the tower wall of the cable tower, so that the cable saddle pad is attached to the inner wall of the tooth-shaped groove, to make the cable saddle pad perpendicular to the steel strand at the outlet of the cable saddle, that is, to meet the demand of coaxiality of the stay cable with the cable saddle at the outlet of the cable saddle". The cable saddle structure of the existing technology is shown in Figure 1 For example, a cable saddle for special-shaped cable tower and cable-stayed system disclosed in Chinese patent CN213925805U and a segmented cable-stayed bridge cable system with cable saddle disclosed in Chinese patent CN107288036A. In the above-mentioned existing technology, in order to adapt to the demand of coaxiality of the stay cable with the cable saddle at the outlet of the cable saddle, a tooth-shaped groove is opened at the outlet of the cable saddle of the cable tower. On the one hand, this tooth-shaped groove weakens the rigidity and structural strength of the cable tower, causing the cable tower to widen in the bridge direction, increasing the cost, and on the other hand, it is not beautiful in appearance, affecting the landscape effect. SUMMARY

[0003] In view of the above problems, the present application provides an anchoring cable saddle for cable-stayed bridge and steel strand cable, aiming to solve the problems of the existing cable saddle structure, which needs to open a tooth-shaped groove at the outlet of the cable saddle of the cable tower, weakening the rigidity and structural strength of the cable tower, causing the cable tower to widen in the bridge direction, increasing the cost, and being not beautiful.

[0004] The present application achieves the above-mentioned purposes by adopting the following technical solutions:

[0005] An anchoring cable saddle for cable-stayed bridge, the cable-stayed bridge comprising a cable tower, the cable saddle comprising a steel sleeve, a first cable saddle pad, a second cable saddle pad, and a turning saddle arranged inside the steel sleeve; wherein the steel sleeve penetrates through both sides of the cable tower, and the outer wall of the steel sleeve is fixedly connected with the cable tower; the turning saddle comprises a hole for passing through the steel strand, the first cable saddle pad and the second cable saddle pad are respectively fixedly connected with the axis of the two ends of the hole; the first cable saddle pad and the second cable saddle pad are provided with steel strand through holes corresponding to the hole; the outer periphery of the first cable saddle pad and the second cable saddle pad is respectively fixedly connected with the inner wall of the steel sleeve; and high-strength mortar is filled between the first cable saddle pad and the second cable saddle pad.

[0006] In the technical solution, the turning saddle is processed according to the set size and turning angle, the number of the hole channels corresponds to the number of the steel strands, the steel sleeve can be sleeved on the outside of the turning saddle in a segmented assembly or an integral forming manner, the first cable saddle base plate and the second cable saddle base plate are fixedly connected with the inner wall of the steel sleeve at both ends of the hole channels respectively, wherein the first cable saddle base plate and the second cable saddle base plate are fixedly connected with the axis of the ports at both ends of the hole channels respectively, that is, the steel strand through holes of the first cable saddle base plate and the second cable saddle base plate are coaxially arranged corresponding to the ports at both ends of the hole channels, the coaxial requirement of the cable at the outlet of the cable saddle is met, then the high-strength mortar is directly cast between the first cable saddle base plate and the second cable saddle base plate in the steel sleeve, and the prefabrication of the whole cable saddle is completed; when the pylon is manufactured, the prefabricated cable saddle is cast simultaneously according to the design requirement, and the installation of the turning saddle is completed after the pylon is cured; the technical solution adopts the structure that the steel sleeve is sleeved with the turning saddle, the steel sleeve completely penetrates through both sides of the pylon, the prestress borne by the first cable saddle base plate and the second cable saddle base plate acts on the high-strength mortar in the steel sleeve, and the high-strength mortar forms a stress surface with a certain inclination angle in the steel sleeve, therefore, the pylon does not need to be provided with a toothed groove, and can be directly made into a plane structure, the rigidity and structural strength of the pylon are improved, the width of the pylon in the bridge direction is reduced, the cost is reduced, and the viewing effect of the pylon is improved.

[0007] Further, the cable saddle further comprises a positioning plate, the positioning plate is provided with a through hole corresponding to the hole channel, the inner ring of the through hole is fixedly connected with the outer wall of the corresponding hole channel, and the outer periphery of the positioning plate is fixedly connected with the inner wall of the steel sleeve. In the technical solution, the positioning plate is convenient for positioning the hole channel in the turning saddle, and the reliability of the turning saddle is improved.

[0008] Further, the pylon comprises a steel shell fixedly arranged on the outside of the tower body, and the outer wall of the steel sleeve is fixedly connected with the steel shell. In the technical solution, the cable saddle is installed in the pylon with the steel shell, and the steel sleeve is fixedly connected with the steel shell, so that the shrinkage stress of the pylon concrete on the steel sleeve at the outlet of the pylon is reduced.

[0009] A steel strand cable for the above-mentioned anchoring cable saddle, the steel strand cable comprises a steel strand penetrating through the steel strand through hole of the first cable saddle base plate and the second cable saddle base plate, and an anchoring structure for anchoring both ends of the steel strand to the first cable saddle base plate and the second cable saddle base plate.

[0010] In the technical solution, after the installation of the cable saddle in the above-mentioned technical solution is completed, the steel strand is passed through the corresponding hole channel of the turning saddle, is tensioned at both sides of the cable saddle, and is anchored through the anchoring structure.

[0011] Further technical solutions are that the anchoring structure comprises a limiting part and an anti-skid key fixed at both ends of the steel strand, and the limiting part is used to limit the movement of the anti-skid key to the inside of the cable saddle.

[0012] Further technical solutions are that the limiting part is a two-piece grommet, the first end surface of the two-piece grommet is clamped on the outer end of the steel strand through hole, and the anti-skid key is clamped on the second end surface of the two-piece grommet. The anchoring structure of the present technical solution can facilitate construction, and in the tensioning process, the steel strand will elongate, that is, the distance between the anti-skid key and the cable saddle pad will increase, and the grommet can fill the distance between the anti-skid key and the cable saddle pad, and can further block the hole of the turning saddle to improve the sealing effect.

[0013] Further technical solutions are that the limiting part is a stepped pad, the stepped pad is provided with steps equal to the number of layers of the steel strand, each layer of the step is provided with a limiting hole corresponding to the steel strand through hole, and the limiting hole and the corresponding hole form a steel strand pipeline with equal length. In the present technical solution, the limiting part in the anchoring structure is a stepped pad, so that the distance between the anti-skid keys at both ends of all steel strands located in the cable saddle is equal, and the steel strands with anti-skid keys can be prefabricated in the factory, and the size and specification of the steel strands are the same during on-site construction, so that confusion and errors are less likely to occur.

[0014] Further technical solutions are that the anti-skid key at one end of the steel strand is an external thread anti-skid key, and the limiting part matched with the external thread anti-skid key is a limiting hole with an internal thread. In the present technical solution, the adjustment of the cable force can be realized by rotating the external thread anti-skid key or the internal thread limiting hole, and the adjustment of the cable force during service is facilitated.

[0015] The present application has the following beneficial effects:

[0016] The anchoring cable saddle and steel strand for a cable-stayed bridge provided by the present application adopt a structure in which a steel sleeve is sleeved with a turning saddle, the steel sleeve penetrates through both sides of a cable tower, prestress borne by first and second cable saddle pads acts on high-strength mortar inside the steel sleeve, and the high-strength mortar forms a stress surface with a certain inclination angle inside the steel sleeve. Therefore, the cable tower does not need to be provided with a tooth-shaped groove, and can be directly made into a planar structure. Compared with the prior art, the present application improves the rigidity and structural strength of the cable tower, reduces the width of the cable tower in the direction of the bridge, reduces the cost, and improves the viewing effect of the cable tower. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic view of the anchoring cable saddle of the prior art.

[0018] Figure 2 Fig. 2 is a structural schematic view of the anchoring cable saddle and steel strand for a concrete cable tower according to the present application.

[0019] Figure 3 See: A schematic diagram of the anchor saddle and steel strand cable of the steel shell cable tower described in this invention.

[0020] Figure 4 See: A schematic diagram of the steel strand anchoring structure described in this invention.

[0021] In the picture:

[0022] 1. Cable tower; 2. Cable saddle; 21. Bogie saddle; 210. Tube; 22. Steel sleeve; 23. First cable saddle pad; 24. Second cable saddle pad; 25. High-strength mortar; 26. Positioning plate; 3. Steel strand; 31. Anti-slip key; 32. External thread anti-slip key; 41. First step pad; 42. Second step pad washer ring; 43. Two-half washer ring; 44. Adjusting nut. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1 to 4 The present invention will be described in detail below with reference to specific embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] like Figure 1 As shown, a cable-stayed bridge anchor saddle in the prior art is disclosed. The cable-stayed bridge includes a tower 1 and a cable saddle 2 passing through both sides of the tower 1. The cable saddle 2 includes channels for threading steel strands. The number of channels is the same as the number of steel strands. In order to meet the needs of cable turning, the channels have a certain curvature. The cable saddle pad is perpendicular to the axis of the channel port. In order to support the cable saddle pad, toothed grooves 10 are respectively opened on the side walls of the tower 1. The bearing capacity of the cable saddle pad acts directly on the outer wall of the toothed grooves 10. The width of the tower 1 in the direction of the bridge is H1, which is greater than the maximum spacing between the cable saddle pads at both ends.

[0025] One embodiment provides an anchor saddle for a cable-stayed bridge, such as Figure 2As shown, the cable-stayed bridge comprises a cable tower 1 made of concrete, the cable saddle comprises a steel sleeve 22, a first cable saddle base plate 23, a second cable saddle base plate 24, and a turning saddle 21 arranged inside the steel sleeve 22; the steel sleeve 22 penetrates through both sides of the cable tower 1, and the outer wall of the steel sleeve 22 is fixedly connected with the cable tower 1; the turning saddle 21 comprises a hole for penetrating the steel strand 3, the first cable saddle base plate 23 and the second cable saddle base plate 24 are respectively fixedly connected with the axis of the two ends of the hole; the first cable saddle base plate 23 and the second cable saddle base plate 24 are provided with steel strand through holes corresponding to the hole; the outer periphery of the first cable saddle base plate 23 and the second cable saddle base plate 24 is respectively fixedly connected with the inner wall of the steel sleeve 22; the first cable saddle base plate 23 and the second cable saddle base plate 24 are further filled with high-strength mortar 25, and the high-strength mortar 25 after solidification is used to bear the force of the first cable saddle base plate 23 and the second cable saddle base plate 24; wherein the width of the cable tower 1 in the bridge direction is H2, which is less than the maximum distance between the first cable saddle base plate 23 and the second cable saddle base plate 24.

[0026] Specifically, the outer wall of the steel sleeve 22 is fixedly connected with the cable tower 1 through the concrete of the cable tower 1, and the steel sleeve 22 can be directly pre-buried in the corresponding position inside the cable tower 1 in the step of pouring the cable tower 1; the first cable saddle base plate 23 and the second cable saddle base plate 24 can be fixedly connected with the two ends of the hole by welding; the first cable saddle base plate 23 and the second cable saddle base plate 24 and the steel sleeve 22 can be fixedly connected by welding, integral molding, etc.; the specific preparation and installation process of the anchor cable saddle in this embodiment is as follows: 1) the turning saddle 21 is processed according to the set size and turning angle, the number of the hole corresponds to the number of the steel strand 3, and the first cable saddle base plate and the second cable saddle base plate are fixed at the two ends of the hole according to the above angle position; 2) the steel sleeve 22 can be sleeved outside the turning saddle 21 by segment assembly or integral molding, and the first cable saddle base plate 23 and the second cable saddle base plate 24 are welded with the inner wall of the steel sleeve 22, that is, the coaxial requirement of the cable-stayed cable at the outlet of the cable saddle is met; 3) the high-strength mortar 25 is directly poured between the first cable saddle base plate 23 and the second cable saddle base plate 24 inside the steel sleeve 22, that is, the overall prefabrication of the cable saddle is completed; 4) when the cable tower 1 is made, the prefabricated cable saddle is poured at the same time according to the design requirements, and after the cable tower is cured, the installation of the cable saddle is completed.

[0027] The anchoring structure of the embodiment adopts the structure of the steel sleeve 22 and the diversion saddle 21, the steel sleeve 22 penetrates through both sides of the cable tower 1, the first cable saddle base plate 23 and the second cable saddle base plate 24 bear the prestress acting on the high-strength mortar 25 inside the steel sleeve 22, and the high-strength mortar 25 forms a stress surface with a certain inclination angle inside the steel sleeve 22. Therefore, the cable tower 1 does not need to be provided with a tooth-shaped groove and can be directly made into a plane structure. Compared with the prior art, the rigidity and structural strength of the cable tower 1 are improved, the width of the cable tower 1 in the bridge direction is reduced, the cost is reduced, and the viewing effect of the cable tower 1 is improved.

[0028] The fixing mode of the first cable saddle base plate 23 and the second cable saddle base plate 24 to the hole can also be temporarily fixed by artificial or supporting tooling, and the temporary fixing device is removed after the welding with the steel sleeve 22 is completed, that is, the indirect fixing connection with the hole is realized through the fixing with the steel sleeve 22.

[0029] The above embodiment exemplarily shows the specific structure of the anchoring cable saddle for the cable tower 1 made of concrete. In other embodiments or actual applications, the above anchoring cable saddle can also be used in the cable tower 1 structure with a steel shell 11. The cable tower 1 is formed by pouring concrete in the steel shell 11, and the concrete is fixedly connected with the steel shell 11 after solidification, or the fixed connection between the steel shell 11 and the concrete tower body is realized through positioning bolts or steel bars. In the embodiment, the steel sleeve 22 penetrates through the steel shell 11 on both sides of the cable tower 1, and the outer wall thereof is fixedly connected with the steel shell 11. The fixed connection can be realized by integral molding or welding. The shrinkage stress of the concrete of the cable tower 1 on the steel sleeve 22 at the outlet of the cable tower 1 can be reduced.

[0030] Another embodiment, on the basis of the above embodiment, provides a steel strand cable for the anchoring cable saddle. The steel strand cable includes a steel strand 3 penetrating through a corresponding steel strand hole of the first cable saddle base plate 23 and the second cable saddle base plate 24, and an anchoring structure for anchoring both ends of the steel strand 3 to the first cable saddle base plate 23 and the second cable saddle base plate 24. The anchoring structure includes a first anchoring structure at one end of the first cable saddle base plate 23 and a second anchoring structure at one end of the second cable saddle base plate 24. The first anchoring structure and the second anchoring structure can adopt the same structure or different structures. The following embodiments exemplarily show some specific anchoring structures:

[0031] As Figure 4As shown, the first anchoring structure includes the anti-skid key 31 fixed to the first end of the steel strand 3, and the limiting part matched therewith is the two-piece grommet 43, which is clamped to the outer end of the steel strand through hole of the first saddle anchoring plate 23 after splicing, and the anti-skid key 31 is clamped to the second end surface of the two-piece grommet 43; the second anchoring structure includes the external thread anti-skid key 32 fixed to the second end of the steel strand 3, and the limiting part matched therewith is the adjusting nut 44, the outer diameter of which is larger than the inner diameter of the steel strand through hole of the second saddle grommet 24, and the adjustment of the cable force of the steel strand 3 is realized by rotating the adjusting nut 44. The specific installation steps of the steel strand cable in the embodiment are as follows: after the pre-burial of the steering saddle 21 is completed, the fixed anti-skid key 31 and the external thread anti-skid key 32 are pre-prepared on each steel strand 3, the interval can be designed according to the length of the channel 210 of the steering saddle 21 and the requirement of the cable force, the steel strand 3 penetrates through the corresponding channel 210, the external thread anti-skid key 32 is matched with the adjusting nut 44, one end of the tension anti-skid key 31 is tensioned to the target cable force, and the two-piece grommet 43 is additionally arranged between the anti-skid key 31 and the first saddle grommet 23 for limiting, the tensioning and cable force locking are completed, the thickness or quantity of the two-piece grommet 43 can be determined according to the specific interval of the anti-skid key 31 and the first saddle grommet 23, which is not limited herein.

[0032] As Figure 2 , Figure 3As shown, the first anchoring structure can further include an anti-slip key 31 fixed to the first end of the steel strand 3, a first stepped pad 41 located outside the first cable saddle pad, the first stepped pad 41 being provided with steps equal to the number of layers of the steel strand 3, and each layer of the step being provided with a limiting hole corresponding to the through hole of the steel strand, and the limiting hole and the anti-slip key 31 can be matched in the manner of indirect limiting by the two half-type pads in the above-mentioned embodiments, or the limiting hole can be directly clamped and limited by the anti-slip key 31 in the manner that the diameter of the limiting hole is smaller than the outer diameter of the anti-slip key 31. The second anchoring structure includes an external thread anti-slip key 32 fixed to the second end of the steel strand 3, and a second stepped pad 42 located outside the second cable saddle pad 24, the second stepped pad 42 being provided with steps equal to the number of layers of the steel strand 3, and each layer of the step being provided with an internal thread limiting hole corresponding to the through hole of the steel strand, and the internal thread limiting hole is screwed with the external thread anti-slip key 32. The limiting part of the present embodiment is a stepped pad, the first stepped pad 41 and the second stepped pad 42 are each provided with steps equal to the number of layers of the steel strand 3, and each layer of the step is provided with a limiting hole corresponding to the through hole of the steel strand, and the length of the steel strand channel formed by the limiting hole and the corresponding hole is equal, which can make the distance between the anti-slip keys at both ends of all steel strands 3 located in the cable saddle equal, and the steel strand 3 with the anti-slip key can be pre-fabricated in the factory, and the size and specification of the steel strand 3 are the same during on-site construction, which is not easy to mix up and make mistakes. The specific installation steps of the steel strand cable in the present embodiment are as follows: after the pre-burial of the deflection saddle 21 is completed, the first stepped pad 41 and the second stepped pad 42 are installed at both ends of the deflection saddle 21, and the fixed anti-slip key 31 and the external thread anti-slip key 32 are pre-fabricated at both ends of each steel strand 3, and the distance is designed according to the length of the hole of the deflection saddle 2; the steel strand 3 passes through the corresponding hole of the deflection saddle 21, the external thread anti-slip key 32 follows the steel strand 3 to pass through the deflection saddle 21, cooperates with the corresponding internal thread limiting hole, the anti-slip key 31 at the other end is clamped with the corresponding limiting hole, and the steel strand 3 is tensioned by rotating the external thread anti-slip key 32; it is worth noting that one of the first anchoring structure or the second anchoring structure can adopt the stepped pad, and the other can adopt the flat pad, and the height difference between the adjacent steps can be designed to realize the equal distance between the anti-slip keys at both ends of the steel strand 3.

[0033] In addition, the anchoring structure of the above-mentioned embodiments can also adopt the anchoring structure in the prior art, for example, the matching mode of the conical anchoring clamping piece and the conical hole, or the steel strand through hole; or one end of the anti-slip key is directly clamped at the outer end of the steel strand through hole, and the other end adopts the anchoring structure in the above-mentioned embodiments or the prior art for tensioning and anchoring.

[0034] The application provides an anchor cable saddle and steel strand cable for a cable-stayed bridge, which adopts a structure of a steel sleeve 22 and a turning saddle 21, the steel sleeve 22 penetrates through both sides of a cable tower 1, prestress borne by a first cable saddle base plate 23 and a second cable saddle base plate 24 acts on high-strength mortar 25 in the steel sleeve 22, and the high-strength mortar 25 forms a stress surface with a certain inclination angle in the steel sleeve 22, so that the cable tower does not need to be provided with a tooth-shaped groove and can be directly made into a plane structure, the rigidity and structural strength of the cable tower 1 are improved, the width of the cable tower in the direction of the bridge is reduced, the cost is reduced, and the viewing effect of the cable tower 1 is improved.

Claims

1. An anchor cable saddle for a cable-stayed bridge, the cable-stayed bridge comprising a pylon, characterized in that, The cable saddle comprises a steel sleeve, a first cable saddle base plate, a second cable saddle base plate, and a turning saddle arranged inside the steel sleeve; The steel sleeve penetrates through both sides of the tower, and the outer wall of the steel sleeve is fixedly connected with the tower; The turning saddle comprises a hole for passing the steel strand, and the first cable saddle base plate and the second cable saddle base plate are respectively fixedly connected with the axis of the port at both ends of the hole; The first cable saddle base plate and the second cable saddle base plate are provided with steel strand through holes corresponding to the hole; The outer periphery of the first cable saddle base plate and the second cable saddle base plate is respectively fixedly connected with the inner wall of the steel sleeve; The first cable saddle base plate and the second cable saddle base plate are further filled with high-strength mortar.

2. The cable saddle for a cable-stayed bridge according to claim 1, wherein The cable saddle further comprises a positioning plate provided with a through hole corresponding to the hole, the inner ring of the through hole is fixedly connected with the outer wall of the corresponding hole, and the outer periphery of the positioning plate is fixedly connected with the inner wall of the steel sleeve.

3. The cable saddle for a cable-stayed bridge according to claim 1, wherein The tower comprises a steel shell fixedly arranged outside the tower body, and the outer wall of the steel sleeve is fixedly connected with the steel shell.

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