CN220486225U - Bearing plate structure for steel-concrete combination section of back-cable-free cable-stayed bridge - Google Patents
Bearing plate structure for steel-concrete combination section of back-cable-free cable-stayed bridge Download PDFInfo
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- CN220486225U CN220486225U CN202322365761.4U CN202322365761U CN220486225U CN 220486225 U CN220486225 U CN 220486225U CN 202322365761 U CN202322365761 U CN 202322365761U CN 220486225 U CN220486225 U CN 220486225U
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- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 238000010276 construction Methods 0.000 claims abstract description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 19
- 239000003351 stiffener Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 abstract description 8
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 5
- 238000009415 formwork Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the technical field of cable-stayed bridge construction, in particular to a bearing plate structure for a steel-concrete combination section of a cable-stayed bridge without a back rope, which comprises a bearing steel plate, a lower structure and an upper structure, wherein the lower structure comprises a lower longitudinal stiffening plate and a lower transverse stiffening plate, the lower longitudinal stiffening plate and the lower transverse stiffening plate are respectively provided with a lower PBL stiffening rib connected, and the lower PBL stiffening ribs are connected with an inner steel bar of a lower bridge tower; the upper structure comprises an upper longitudinal stiffening plate and an upper transverse stiffening plate, and the upper PBL stiffening ribs, the upper longitudinal stiffening plate and the upper transverse stiffening plate are connected with the concrete of the upper bridge tower steel box. The utility model can effectively transfer the tensile stress received by the bearing plate to the main reinforcement in the lower concrete bridge tower, and the hooking action of the reinforcement in the lower bridge tower to the bearing plate can greatly reduce the tensile stress of the bearing plate and the concrete junction surface of the lower bridge tower, ensure that the junction surface is not hollow, improve the durability of the bearing plate and the safety of the bridge tower, and be suitable for the steel-concrete junction section of the back cable-free cable-stayed bridge.
Description
Technical Field
The utility model relates to the technical field of cable-stayed bridge construction, in particular to a bearing plate structure for a steel-concrete combined section of a cable-stayed bridge without a back cable.
Background
The cable-stayed bridge without the back cables is a modern bridge structure, has unique structural design and attractive appearance, can become a landmark building of a city, and is widely applied to urban landscape bridges in recent years. The traditional construction method that the formwork is erected first and then concrete is poured is adopted for the overall length of the cable-stayed bridge, but the tower of the cable-stayed bridge without the back cables is generally integrally poured, if the traditional method is adopted for construction, the number of required formworks is large, and the inclination of the tower of the cable-stayed bridge brings great challenges to the installation precision between the formworks. Therefore, in recent years, in order to shorten the construction period of the back-cable-stayed bridge without carrying cables, and simultaneously in order to ensure the construction precision of bridge towers, more and more bridge towers of the bridge towers without carrying cables begin to adopt a structural form that a steel box is filled with concrete.
The bearing plate is a device which is often used in engineering, in particular at the junction of a steel structure and a concrete structure. The main function of the bearing plate is to transfer load from the steel member to the concrete member, and meanwhile, the rigidity and strength of the steel-concrete joint part can be enhanced, so that the stability and safety of the whole structure are ensured. Especially in the junction of the steel bridge tower of cable-stayed bridge and lower tower column concrete section, the effect of bearing plate is very important, can transmit the load from bridge face roof beam to the pier effectively, guarantees the safety and stability of whole bridge structure.
The existing steel-concrete combined section bearing plate is usually formed by inserting reinforcing steel bars through holes reserved in a lower rib plate, and then binding the inserted reinforcing steel bars with main ribs in concrete to form a main body, wherein the main ribs in the concrete are cut off at a certain distance below the bearing plate and are not welded with the bearing plate, so that certain defects exist in the bearing plate, and the main ribs in a bridge tower and the bearing plate do not form a main body, so that the main body and the main rib cannot bear force together. Therefore, a crack is formed along the bearing plate at the position where the lower part of the bearing plate is connected with the concrete, the crack can not affect the stress system of the bridge tower, but can become a rapid channel for water transmission along with the increase of the service life of the bridge, especially for the bridge structure, the relative humidity in the surrounding environment can be further increased because the bridge structure spans a river, a local high humidity field is formed around the bridge, the corrosion of the bearing plate is accelerated, and the durability of the bearing plate is greatly challenged.
In addition, for the cable-stayed bridge without the back cables, the balance of the bridge structure in a natural state is considered in design. The bridge tower is inclined at a certain angle, and the dead weight of the main beam is transferred to the bridge tower through the stay cable, so that the stress balance of the main beam and the tower is realized. Although the design can reduce the load of the main beam, the bridge is more stable and reliable. However, due to the inclined characteristic of the bridge tower, the bearing plate is also at a certain angle with the horizontal plane, so that the bearing plate is pressed while being pulled when being stressed, and the risk of the pulling side bearing plate being separated from the concrete is increased.
Disclosure of Invention
Aiming at the problem that a tension side bearing plate is separated from concrete in the prior art, the utility model provides a bearing plate structure for a steel-concrete combination section of a cable-stayed bridge without a back cable.
The utility model is realized by the following technical scheme:
the bearing plate structure for the steel-concrete combination section of the back-cable-free cable-stayed bridge comprises a bearing steel plate, a lower structure and an upper structure, wherein the bearing steel plate is obliquely arranged and is perpendicular to the inclination angle of a bridge tower; the upper structure and the lower structure are respectively fixed on the upper side and the lower side of the plate surface of the pressure-bearing steel plate;
the lower structure comprises a lower longitudinal stiffening plate and a lower transverse stiffening plate, the lower longitudinal stiffening plate is vertical to the lower transverse stiffening plate, the lower longitudinal stiffening plate and the lower transverse stiffening plate are respectively provided with a lower PBL stiffening rib connected with the lower PBL stiffening rib and connected with the inner steel bars of the lower bridge tower, and the lower longitudinal stiffening plate and the lower transverse stiffening plate are both coupled with the concrete of the steel box of the lower bridge tower;
the upper structure comprises an upper longitudinal stiffening plate and an upper transverse stiffening plate, the upper PBL stiffening ribs are connected, the upper longitudinal stiffening plate and the upper transverse stiffening plate are connected with the concrete of the upper bridge tower steel box, the upper longitudinal stiffening plate is perpendicular to the upper transverse stiffening plate, and the upper PBL stiffening ribs are connected to the upper longitudinal stiffening plate and the upper transverse stiffening plate.
Preferably, a plurality of upper auxiliary PBL stiffening ribs and a plurality of lower auxiliary PBL stiffening ribs are arranged on two sides of the edge of the pressure-bearing steel plate in an encrypted mode, one upper auxiliary PBL stiffening rib and one lower auxiliary PBL stiffening rib are a group, and the upper auxiliary PBL stiffening ribs and the lower auxiliary PBL stiffening ribs which are located in the same group are located on the same plane.
Preferably, a plurality of equidistant notches are formed at the edge of the pressure-bearing steel plate.
Preferably, the reinforcing steel bar penetrates from a certain notch, bends after penetrating and penetrates back from an adjacent notch.
Preferably, the pressure-bearing steel plate is provided with vibrating holes.
Preferably, the plate surface of the pressure-bearing steel plate is hexagonal.
Preferably, the connecting lower PBL stiffening rib is provided with a first hole, and the first hole is used for penetrating the first reinforcing steel bar.
Preferably, the connecting PBL stiffening ribs are provided with second holes, and the second holes are used for penetrating second reinforcing steel bars.
Preferably, the upper longitudinal stiffening plate and the upper transverse stiffening plate in the upper structure are provided with a plurality of upper longitudinal stiffening plates and upper transverse stiffening plates which are arranged in a 'well' -shape.
Preferably, the lower longitudinal stiffening plate and the lower transverse stiffening plate in the lower structure are provided with a plurality of stiffening plates which are arranged in a 'well' -shape.
Compared with the prior art, the utility model has the following beneficial effects:
the bearing plate structure for the steel-concrete combined section of the back-cable-free cable-stayed bridge can effectively transfer the tensile stress born by the bearing plate to the main reinforcement in the lower concrete bridge tower, and the tensile stress of the bearing plate and the concrete combined surface of the lower bridge tower is greatly reduced due to the hooking action of the reinforcement in the lower bridge tower on the bearing plate in the operation process of the bridge structure, so that the combined surface is prevented from being hollow, the durability of the bearing plate and the safety of the bridge tower are improved, and the structure is applicable to the steel-concrete combined section of the back-cable-free cable-stayed bridge.
Further, the hoop reinforcement can effectively transfer the tensile stress received by the bearing plate to the main reinforcement in the lower concrete bridge tower, so that the tensile stress of the concrete joint surface of the bearing plate and the lower bridge tower is greatly reduced, the joint surface is ensured not to be empty, and the durability of the bearing plate and the safety of the bridge tower are improved.
Further, the upper longitudinal stiffening plates and the upper transverse stiffening plates which are arranged in a cross structure are welded together with the pressure-bearing steel plate to form a whole, so that the rigidity of the pressure-bearing steel plate can be improved.
Drawings
FIG. 1 is a schematic triangular view of a bearing plate construction for a steel-concrete joint section of a cable-stayed bridge without a back cable according to the present utility model;
FIG. 2 is a plan view of a bearing plate for a steel-concrete joint section of a cable-stayed bridge without a back cable according to the present utility model;
FIG. 3 is an elevation view of a bearing plate for a reinforced concrete joint section of a cable-stayed bridge without a back cable in accordance with the present utility model;
fig. 4 is a schematic view of the bridge tower after the pouring of the steel reinforced concrete combination section is completed and the steel bar and the bearing plate are anchored mutually.
In the figure, 1, connecting lower PBL stiffening ribs; 2. connecting with the PBL stiffening ribs; 3. upper longitudinal stiffening plates; 4. upper transverse stiffening plates; 5. a pressure-bearing steel plate; 6. lower transverse stiffening plates; 7. lower longitudinal stiffening plates; 8. reinforcing steel bars.
Detailed Description
The utility model will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the utility model.
The utility model discloses a bearing plate structure for a steel-concrete combination section of a back-cable-free cable-stayed bridge, which is shown in figures 1, 2 and 3, and comprises a bearing steel plate 5, a lower structure and an upper structure, wherein the bearing steel plate 5 is obliquely arranged and is perpendicular to the inclination angle of a bridge tower; the upper structure and the lower structure are welded and fixed to the upper and lower sides of the plate surface of the pressure-bearing steel plate 5, respectively.
The superstructure comprises a plurality of upper longitudinal stiffeners 3 and a plurality of upper transverse stiffeners 4, both longitudinal stiffeners and upper transverse stiffeners 4 being arranged in a "well" shape. The upper longitudinal stiffening plate 3 and the upper transverse stiffening plate 4 are vertical, the upper longitudinal stiffening plate 3 and the upper transverse stiffening plate 4 are respectively provided with an upper PBL stiffening rib 2, and the upper PBL stiffening rib 2, the upper longitudinal stiffening plate 3 and the upper transverse stiffening plate 4 are respectively connected with the concrete of the upper bridge tower steel box. And a second hole is formed in the PBL stiffening rib 2 which is connected with the PBL stiffening rib, and the second hole is used for penetrating a second reinforcing steel bar. In the embodiment, the upper longitudinal stiffening ribs divide the transverse direction of the pressure-bearing steel plate 5 into three parts in two; the upper transverse stiffening ribs are three on the surface of the pressure-bearing steel plate 5 and divide the pressure-bearing steel plate 5 into four parts.
The lower structure comprises a plurality of lower longitudinal stiffening plates 7 and a plurality of lower transverse stiffening plates 6, the lower longitudinal stiffening plates 7 and the lower transverse stiffening plates 6 are vertical and are arranged in a 'well' -shaped mode, the lower longitudinal stiffening plates 7 and the lower transverse stiffening plates 6 are respectively provided with a lower PBL stiffening rib 1 connected with the lower PBL stiffening ribs 1 and connected with the inner reinforcing steel bars of the lower bridge tower, and the lower longitudinal stiffening plates 7 and the lower transverse stiffening plates 6 are respectively coupled with the concrete of the lower bridge tower steel box. The PBL stiffening rib 1 is provided with a first hole for penetrating the first reinforcing steel bar. In the embodiment, the lower longitudinal stiffening ribs divide the transverse direction of the pressure-bearing steel plate 5 into three parts in two ways; the lower transverse stiffening ribs are three on the surface of the pressure-bearing steel plate 5 and divide the pressure-bearing steel plate 5 into four parts.
The plate surface of the pressure-bearing steel plate 5 is hexagonal. A plurality of upper auxiliary PBL stiffening ribs and a plurality of lower auxiliary PBL stiffening ribs are arranged on two sides of the edge of the pressure-bearing steel plate 5 in an encrypted mode, one upper auxiliary PBL stiffening rib and one lower auxiliary PBL stiffening rib are a group, and the upper auxiliary PBL stiffening ribs and the lower auxiliary PBL stiffening ribs which are positioned in the same group are positioned on the same plane.
Referring to fig. 4, a plurality of equally spaced notches are formed at the edge of the pressure-bearing steel plate 5, reinforcing bars 8 are inserted into the notches, the reinforcing bars 8 penetrate from the notches on one side, and after penetrating, the reinforcing bars are bent and penetrate back from the other adjacent notch. The steel bars at two sides can be welded on the concrete main bars in the lower bridge tower to form a bent hook, so that the bearing plate is hooked with the lower main bars.
The hoop reinforcement can effectively transfer the tensile stress received by the bearing plate to the main reinforcement in the lower concrete bridge tower, so that the tensile stress of the concrete joint surface of the bearing plate and the lower bridge tower is greatly reduced, the joint surface is ensured not to be hollow, and the durability of the bearing plate and the safety of the bridge tower are improved.
The pressure-bearing steel plate 5 is provided with vibrating holes.
The utility model relates to a bearing plate structure for a steel-concrete combination section of a back-cable-free cable-stayed bridge, which comprises the following implementation principles:
the parts connected with the upper PBL stiffening rib 2, the lower PBL stiffening rib 1, the upper longitudinal stiffening rib, the lower longitudinal stiffening rib, the upper transverse stiffening rib, the lower transverse stiffening rib, the pressure-bearing steel plate 5 and the like are processed in factories.
The connection of the parts such as the upper PBL stiffening rib 2, the lower PBL stiffening rib 1, the upper longitudinal stiffening rib, the lower longitudinal stiffening rib, the upper transverse stiffening rib, the lower transverse stiffening rib, the pressure-bearing steel plate 5 and the like is completed in a factory by welding.
After the bearing plate is processed in the factory, the bearing plate can be lifted and finished on the construction site.
And after the bearing plate is lifted and installed on the construction site, binding construction can be carried out on the lower reinforcing steel bars in the concrete structure of the lower bridge tower, and the lower reinforcing steel bars are inserted into the lower PBL stiffening ribs 1.
After the construction of the lower reinforcing steel bar is completed, the processed U-shaped reinforcing steel bars can be inserted into the notches at two sides and welded with the main ribs at the lower part, or the U-shaped reinforcing steel bars extend out from the main ribs at the lower part to the upper part of the pressure-bearing steel plate 5 and are bent, and then penetrate back from the other side.
And pouring concrete and welding Fang Gangda after the construction of the steel bars in the notch of the bearing plate is completed.
The foregoing description of the preferred embodiment of the present utility model is not intended to limit the technical solution of the present utility model in any way, and it should be understood that the technical solution can be modified and replaced in several ways without departing from the spirit and principle of the present utility model, and these modifications and substitutions are also included in the protection scope of the claims.
Claims (10)
1. The bearing plate structure for the steel-concrete combination section of the back-cable-free cable-stayed bridge is characterized by comprising a bearing steel plate (5), a lower structure and an upper structure, wherein the bearing steel plate (5) is obliquely arranged and is perpendicular to the inclination angle of a bridge tower; the upper structure and the lower structure are respectively fixed on the upper side and the lower side of the plate surface of the pressure-bearing steel plate (5);
the lower structure comprises a lower longitudinal stiffening plate (7) and a lower transverse stiffening plate (6), the lower longitudinal stiffening plate (7) is vertical to the lower transverse stiffening plate (6), the lower longitudinal stiffening plate (7) and the lower transverse stiffening plate (6) are respectively provided with a lower PBL stiffening rib (1) connected, the lower PBL stiffening rib (1) is connected with an inner reinforcing steel bar of a lower bridge tower, and the lower longitudinal stiffening plate (7) and the lower transverse stiffening plate (6) are both coupled with concrete of a lower bridge tower steel box;
the upper structure comprises an upper longitudinal stiffening plate (3) and an upper transverse stiffening plate (4), wherein the upper longitudinal stiffening plate (3) and the upper transverse stiffening plate (4) are connected with the PBL stiffening rib (2), the upper longitudinal stiffening plate (3) and the upper transverse stiffening plate (4) are all connected with the concrete of the upper bridge tower steel box, the upper longitudinal stiffening plate (3) and the upper transverse stiffening plate (4) are vertical, and the upper longitudinal stiffening plate (3) and the upper transverse stiffening plate (4) are all provided with the PBL stiffening rib (2) to be connected.
2. The bearing plate structure for a steel-concrete combination section of a cable-stayed bridge without a back rope according to claim 1, wherein a plurality of upper auxiliary PBL stiffeners and a plurality of lower auxiliary PBL stiffeners are arranged in an encrypted manner on both sides of the edge of the bearing plate (5), one upper auxiliary PBL stiffener and one lower auxiliary PBL stiffener are in a group, and the upper auxiliary PBL stiffener and the lower auxiliary PBL stiffener which are in the same group are in the same plane.
3. Bearing plate structure for a steel-concrete joint section of a cable-stayed bridge without a back rope according to claim 2, characterized in that a plurality of equally spaced notches are formed at the edge of the bearing steel plate (5).
4. The bearing plate structure for a steel-concrete joint section of a cable-stayed bridge without a back rope according to claim 1, wherein the reinforcing steel bars (8) are penetrated through the inside of the notch, and the reinforcing steel bars (8) penetrate through the notch on one side, bend after penetrating and penetrate back through the adjacent notch.
5. The bearing plate structure for the steel-concrete combination section of the cable-stayed bridge without a back rope according to claim 1, wherein the bearing plate (5) is provided with vibrating holes.
6. Bearing plate construction for a steel-concrete joint section of a cable-stayed bridge without a back rope according to claim 1, characterized in that the plate surface of the bearing steel plate (5) is hexagonal.
7. The bearing plate structure for the steel-concrete combination section of the cable-stayed bridge without a back rope according to claim 1, wherein the lower connecting PBL stiffening rib (1) is provided with a first hole for penetrating a first reinforcing steel bar.
8. The bearing plate structure for the steel-concrete combination section of the cable-stayed bridge without the back rope according to claim 1, wherein the connecting PBL stiffening rib (2) is provided with a second hole for penetrating a second reinforcing steel bar.
9. Bearing plate construction for a steel-concrete joint section of a cable-stayed bridge without a back rope according to claim 1, characterized in that the upper longitudinal stiffening plate (3) and the upper transverse stiffening plate (4) are provided in plurality in a # -shaped arrangement in the upper construction.
10. Bearing plate construction for a steel-concrete joint section of a cable-stayed bridge without a back rope according to claim 1, characterized in that the lower longitudinal stiffening plate (7) and the lower transverse stiffening plate (6) in the lower construction are provided in plurality and are arranged in a 'well' shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365761.4U CN220486225U (en) | 2023-08-31 | 2023-08-31 | Bearing plate structure for steel-concrete combination section of back-cable-free cable-stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365761.4U CN220486225U (en) | 2023-08-31 | 2023-08-31 | Bearing plate structure for steel-concrete combination section of back-cable-free cable-stayed bridge |
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| CN220486225U true CN220486225U (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322365761.4U Active CN220486225U (en) | 2023-08-31 | 2023-08-31 | Bearing plate structure for steel-concrete combination section of back-cable-free cable-stayed bridge |
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| CN (1) | CN220486225U (en) |
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2023
- 2023-08-31 CN CN202322365761.4U patent/CN220486225U/en active Active
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