CN113047172A - External steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure - Google Patents
External steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure Download PDFInfo
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- CN113047172A CN113047172A CN202110430046.7A CN202110430046A CN113047172A CN 113047172 A CN113047172 A CN 113047172A CN 202110430046 A CN202110430046 A CN 202110430046A CN 113047172 A CN113047172 A CN 113047172A
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- anchoring
- steel strand
- anchor
- cable
- stay
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an external steel strand-stay bar cable-stayed bridge pylon anchoring structure which comprises two anchoring beams, wherein the two anchoring beams are a first anchoring beam and a second anchoring beam respectively, the first anchoring beam and the second anchoring beam are relatively fixed on the wall of a bridge pylon, and a steel strand-stay bar combined structure for bearing horizontal force between the anchoring beams is arranged between the first anchoring beam and the second anchoring beam. According to the invention, the stay cable force is decomposed into the vertical force and the horizontal force by the anchor beam, the vertical force is borne by bridge tower concrete, the horizontal force is borne by the steel strand-stay rod combined structure, the material properties of the steel plate and the steel strand are fully exerted, the steel strand has larger tensile bearing capacity, the steel consumption can be reduced, the anchor beam adopts a form that one end is fixedly connected and the other end is movable, the horizontal force borne by the bridge tower can be reduced, and the cracking risk of the bridge tower concrete is reduced.
Description
Technical Field
The invention belongs to the technical field of bridge design, and particularly relates to an external steel strand-stay bar cable-stayed bridge cable tower anchoring structure.
Background
The anchoring of the stay cable at the cable tower end is an important component part related to the safety of the structure, the commonly used anchoring modes in China mainly comprise hoop prestress, a steel anchor beam and a steel anchor box, the hoop prestress is mainly applied to small and medium span bridges, the steel anchor beam is mainly applied to highway bridges with small live load effect, the steel anchor box structure is widely adopted in railway cable-stayed bridges, but the steel anchor box structure is still in perfect development due to the fact that the steel consumption is large, the steel anchor box is not easy to install, and the bridge tower concrete still has cracking risk.
Traditional steel anchor case comprises anchor beam and steel crossbeam, and for reducing the bridge tower and bear the horizontal force, according to rigidity distribution principle, the steel crossbeam often needs great size, and the volume of using steel is great, and whole hoist and mount weight is great. The invention fully researches the force transmission mechanism of the steel anchor box, utilizes the material characteristics of bridge tower concrete bearing and steel bearing and pulling, and designs the cable tower anchoring structure which can ensure reliable stress, reduce hoisting weight, use small amount of steel, be convenient for installation and reduce the cracking risk of the bridge tower concrete.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide an external steel strand-stay bar cable-stayed bridge pylon anchoring structure.
The technical scheme of the invention is as follows: the utility model provides an external steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure, includes two anchor roof beams, and two anchor roof beams are I anchor roof beam and II anchor roof beams respectively, I anchor roof beam and II anchor roof beams relatively fixed are on the pylon tower wall, be provided with the steel strand wires-vaulting pole integrated configuration that undertakes the horizontal force between the anchor roof beam between I anchor roof beam and II anchor roof beams.
Furthermore, the No. I anchoring beam is a fixed anchoring beam, and the No. I anchoring beam is combined with the bridge tower concrete into a whole through the shear nails.
Furthermore, the No. II anchoring beam is a movable anchoring beam, the bridge tower corresponds to the No. II anchoring beam to form a movable installation position, the movable installation position is formed by surrounding and closing steel plates on the side walls of four sides, and the No. II anchoring beam is arranged in the movable installation position.
Furthermore, the side wall steel plate is fixed with the bridge tower concrete through the shear nails.
Furthermore, the No. I anchoring beam and the No. II anchoring beam are identical in structure, a stay cable connecting piece for fixedly installing a stay cable is arranged in the anchoring beam, and the stay cable connecting piece is connected with the web plate.
Furthermore, the inhaul cable connecting piece comprises a supporting plate, and a bearing plate and an anchor backing plate are arranged at the end part of the supporting plate.
Furthermore, the outer wall of the end part of the support plate is provided with a support plate stiffening rib for reinforcing the support plate.
Furthermore, the steel strand-stay bar combined structure comprises end anchor plates, and only the compression stay bar and the steel strand group are arranged between the two end anchor plates.
Furthermore, a stiffening rib for reinforcing the anchoring part of the end anchor plate and the anchoring beam is arranged at the anchoring part of the end anchor plate and the anchoring beam.
According to the invention, the stay cable force is decomposed into the vertical force and the horizontal force by the anchor beam, the vertical force is borne by bridge tower concrete, the horizontal force is borne by a steel strand-strut combined structure, the material properties of the steel plate and the steel strand are fully exerted, the steel strand has larger tensile bearing capacity, the steel consumption can be reduced, the anchor beam adopts a structural system with one end fixed and the other end movable, the horizontal force borne by the bridge tower can be reduced, and the cracking risk of the bridge tower concrete is reduced.
Drawings
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a schematic view of the installation of the steel strand-stay bar combination structure of the present invention;
FIG. 3 is a schematic of the structure of the present invention 100;
wherein:
100 anchoring beam 101 anchoring backing plate
102 bearing plate 103
104 support plate stiffener 105 web
106 top plate 107 bottom plate
108 stainless steel sheet layer 109 polytetrafluoroethylene layer
200 steel strand-stay bar composite structure
201 end anchor plate 202 stiffener
203 only pressed stay bar 204 temporarily stretching supporting plate
205 steel strand set.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1, an external steel strand-strut cable-stayed bridge pylon anchoring structure comprises two anchoring beams 100, wherein the two anchoring beams 100 are respectively a first anchoring beam and a second anchoring beam, the first anchoring beam and the second anchoring beam are relatively fixed on the wall of a bridge pylon, and a steel strand-strut combined structure 200 for bearing horizontal force between the anchoring beams is arranged between the first anchoring beam and the second anchoring beam.
The No. I anchoring beam is a fixed anchoring beam, and the No. I anchoring beam is combined with the bridge tower concrete into a whole through the shear nails.
No. II anchor roof beams are the movable anchor roof beam, and the bridge tower corresponds No. II anchor roof beams and forms movable mounting position, movable mounting position is enclosed by four sides lateral wall steel sheet and closes and forms, No. II anchor roof beams are arranged in movable mounting position.
The side wall steel plate is fixed with bridge tower concrete through shear nails.
No. I anchor roof beam is the same with No. II anchor roof beam structure, is provided with the cable connecting piece that carries out fixed mounting to the suspension cable in the anchor roof beam 100, the cable connecting piece links to each other with web 105.
The inhaul cable connecting piece comprises a supporting plate 103, and a bearing plate 102 and an anchor backing plate 101 are arranged at the end part of the supporting plate 103.
A support plate stiffener 104 for reinforcing the support plate 103 is formed at an outer wall of an end portion thereof.
The steel strand-strut combination structure 200 comprises end anchor plates 201, and only a compression strut 203 and a steel strand group 205 are arranged between the two end anchor plates 201.
The anchoring part of the end anchor plate 201 and the anchoring beam 100 is provided with a stiffening rib 202 for reinforcing the same.
The anchoring beam 100 comprises a rectangular beam body structure, an inclined web 105 is formed on one side of the beam body, the inhaul cable connecting piece is arranged in the beam body structure, and the anchoring backing plate 101 is located on the inclined end face of the web 105.
The number II anchoring beam is a movable anchoring beam, polytetrafluoroethylene layers 109 in the inner layer are arranged on the four side walls, and stainless steel plate layers 108 are arranged on the outer walls of the polytetrafluoroethylene layers 109.
The four side walls of the movable installation position comprise a top plate 106, a bottom plate 107 and two side plates, and the four side walls are enclosed to form a rectangular structure.
The four layers 108 of stainless steel can slide along the lower end of the top plate 106, the upper end of the bottom plate 107 and the inner walls of the two side plates.
No. II anchor roof beam is movable anchor roof beam for I anchor roof beam relatively, through its setting with the bridge tower activity, can reduce the bridge tower and bear the horizontal force, reduces bridge tower concrete fracture risk.
The inhaul cable connecting piece is obliquely arranged.
The stay cable connecting piece is subjected to a stay cable force which is divided into a vertical component force and a horizontal component force, the anchoring beam 100 respectively transmits the vertical component force and the horizontal component force to the wall of the bridge tower and the steel strand-stay bar combined structure 200, and the steel strand-stay bar combined structure 200 bears the horizontal component force.
The steel strand group 205 in the steel strand-strut combined structure 200 plays a role in tension resistance, the steel strand-strut combined structure 200 transmits horizontal component force of the stay cables, and the steel strand group 205 is anchored on the anchor plates 201 at two side ends, wherein the number of the steel strands is determined according to the balance cable force of the stay cables at two sides, so that the ultimate tension strength can be improved and the steel plate consumption can be reduced compared with steel materials bearing the same tension force.
The steel strand-strut combined structure is further provided with only-pressed struts 203 between the end anchor plates 201 on the two sides for applying initial tension to the steel strand, and the only-pressed struts 203 are connected with the end anchor plates in a double-nut mode.
The end anchor plate 201 is internally provided with a through hole, only the compression stay bar 203 is a double-end long screw, two nuts are arranged at the thread part of each end, the outer nut moves and the inner nut is fixed, and the outer nut moves so that the compression stay bar 203 is only compressed and is not stressed under the action of the initial tension of the steel strand.
Preferably, the amount of movement of all compression-only struts 203 is consistent, i.e., the amount of clearance between the outer nuts on compression-only struts 203 and end anchor plate 201 is the same.
A temporary tensioning support plate 204 for initially tensioning the steel strand group 205 is further arranged between the two end anchor plates 201.
The installation mode of the invention is as follows:
firstly, the two-end anchoring beam 100 is assembled on site, and the assembly comprises the installation of a polytetrafluoroethylene layer 109 and a stainless steel plate layer 108 of the movable anchoring beam and an end anchoring plate 201.
Then, a temporary tension stay 204, only the compression stay 203 and the steel strand set 205 are installed between the end anchor plates 201, and the same initial tension is applied to the steel strand set 205 to compress the compression stay 203.
And finally, hoisting the whole body into the tower for installation, and removing the temporary tensioning support plate 204 after the stay cable is tensioned.
Another installation mode of the invention
Firstly, the anchoring beam 100 and the steel strand-stay bar combined structure 200 are hoisted into the tower in blocks.
Then, the anchoring beam 100 and the end anchor plate 201 are assembled in the tower.
Then, a temporary tension bracing plate 204, only the compression bracing rods 203 and the steel strand set 205 are installed between the end anchor plates 201, and the same initial tension is applied to the steel strand set 205 to compress the compression bracing rods 203.
And finally, removing the temporary tensioning support plate 204 after the stay cable is tensioned.
According to the invention, the stay cable force is decomposed into the vertical force and the horizontal force by the anchor beam, the vertical force is borne by bridge tower concrete, the horizontal force is borne by a steel strand-strut combined structure, the material properties of the steel plate and the steel strand are fully exerted, the steel strand has larger tensile bearing capacity, the steel consumption can be reduced, the anchor beam adopts a structural system with one end fixed and the other end movable, the horizontal force borne by the bridge tower can be reduced, and the cracking risk of the bridge tower concrete is reduced.
Claims (9)
1. The utility model provides an external steel strand wires-vaulting pole cable-stay bridge pylon anchor structure, includes two anchor roof beams (100), its characterized in that: the two anchoring beams (100) are respectively a No. I anchoring beam and a No. II anchoring beam, the No. I anchoring beam and the No. II anchoring beam are relatively fixed on the tower wall of the bridge tower, and a steel strand-strut combined structure (200) for bearing horizontal force between the anchoring beams is arranged between the No. I anchoring beam and the No. II anchoring beam.
2. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 1, characterized in that: the No. I anchoring beam is a fixed anchoring beam, and the No. I anchoring beam is combined with the bridge tower concrete into a whole through the shear nails.
3. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 2, characterized in that: no. II anchor roof beams are the movable anchor roof beam, and the bridge tower corresponds No. II anchor roof beams and forms movable mounting position, movable mounting position is enclosed by four sides lateral wall steel sheet and closes and forms, No. II anchor roof beams are arranged in movable mounting position.
4. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 3, wherein: the side wall steel plate is fixed with bridge tower concrete through shear nails.
5. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 1, characterized in that: no. I anchor roof beam is the same with No. II anchor roof beam structure, is provided with the cable connecting piece that carries out fixed mounting to the suspension cable in anchor roof beam (100), the cable connecting piece links to each other with web (105).
6. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 5, wherein: the inhaul cable connecting piece comprises a supporting plate (103), and a pressure bearing plate (102) and an anchor backing plate (101) are arranged at the end part of the supporting plate (103).
7. The external steel strand-stay rod cable-stayed bridge pylon anchoring structure according to claim 6, wherein: and a bearing plate stiffening rib (104) for reinforcing the bearing plate (103) is formed at the outer wall of the end part of the bearing plate.
8. The external steel strand-stay cable-stayed bridge pylon anchoring structure according to claim 7, wherein: the steel strand-stay bar combined structure (200) comprises end anchor plates (201), and only a compression stay bar (203) and a steel strand group (205) are arranged between the two end anchor plates (201).
9. The external steel strand-stay cable-stayed bridge pylon anchoring structure according to claim 8, wherein: and a stiffening rib (202) for reinforcing the end anchor plate (201) and the anchoring part of the anchoring beam (100) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110430046.7A CN113047172A (en) | 2021-04-21 | 2021-04-21 | External steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110430046.7A CN113047172A (en) | 2021-04-21 | 2021-04-21 | External steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113047172A true CN113047172A (en) | 2021-06-29 |
Family
ID=76520014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110430046.7A Pending CN113047172A (en) | 2021-04-21 | 2021-04-21 | External steel strand wires-vaulting pole cable-stay bridge cable tower anchor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113047172A (en) |
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2021
- 2021-04-21 CN CN202110430046.7A patent/CN113047172A/en active Pending
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