CN220704343U - UHPC upper bearing platform for horizontal rotation bridge - Google Patents
UHPC upper bearing platform for horizontal rotation bridge Download PDFInfo
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- CN220704343U CN220704343U CN202321780954.XU CN202321780954U CN220704343U CN 220704343 U CN220704343 U CN 220704343U CN 202321780954 U CN202321780954 U CN 202321780954U CN 220704343 U CN220704343 U CN 220704343U
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- uhpc
- bearing platform
- upper bearing
- bridge
- ring beam
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 118
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 210000002435 tendon Anatomy 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model discloses a parallel rotating bridge UHPC upper bearing platform, wherein the UHPC upper bearing platform is of a truss structure, reinforcing steel bars or prestressed ribs are arranged in the UHPC upper bearing platform, an embedded traction cable anchorage device is formed by a UHPC ring beam and a UHPC connecting beam, the UHPC connecting beam is connected with the lower part of a pier, traction cable steel strands are wound around the periphery of the UHPC ring beam, traction cable supporting reinforcing steel bars or steel strips are arranged, a steel plate is attached to the bottom, the steel plate is attached to a slideway to form supporting feet so as to prevent the overturning of a swivel bridge, the transverse reinforcing steel bars and the transverse prestressed ribs penetrate through the UHPC upper bearing platform and the lower part of the pier, a plurality of transverse reinforcing steel bars extend out of a hollowed-out area of the upper bearing platform and are matched with a plurality of longitudinal reinforcing steel bars extending out of the top of the lower bearing platform, a hinge is sealed after the swivel, reinforcing steel bars and the hollowed-out area of the UHPC upper bearing platform are in a binding mode, concrete pouring is performed, the upper bearing platform and the lower bearing platform are integrally tensioned, the vertical prestressed ribs of the upper bearing platform and the lower bearing platform are vertically connected.
Description
Technical Field
The utility model relates to the technical field of construction of a horizontal rotation method swivel bridge, in particular to a UHPC upper bearing platform of a horizontal rotation method bridge.
Background
The bridge swivel construction is a construction method that a bridge structure is formed at a non-design axis position through casting or splicing and then positioned through a swivel. The method has little influence on the existing line, and is suitable for bridge construction crossing canyons, rivers, railways, highways and the like. With the continuous increase of the construction scale of the domestic traffic infrastructure, the technology is widely applied to engineering.
The key technology of bridge swivel construction is as follows: the rotation, rotation stabilization and rotation calibration are controlled by an anti-overturning system, and generally comprise an upper bearing platform and supporting feet. In order to ensure stable proceeding of bridge swivel, the upper bearing platform often needs to have enough thickness, which causes the problem of large body quantity of the existing upper bearing platform. However, the problem directly causes the disadvantage that the depth of the foundation pit is increased and the manufacturing cost is obviously increased because the bearing platform cannot be exposed out of the construction requirement of the ground.
After the bridge swivel is completed, the upper disc and the lower disc are required to be sealed for realizing effective transfer of the load, but the sealing operation surface is limited due to smaller distance between the upper bearing platform and the lower bearing platform, so that the existing concrete between the upper bearing platform and the lower bearing platform is easy to have the condition of non-compact pouring and poor integrity.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a UHPC upper bearing platform which has small thickness and small volume and can provide a larger sealing operation surface and a construction method thereof.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: an upper bearing platform of a bridge UHPC by a horizontal rotation method comprises
The UHPC upper bearing platform is of a space lattice structure, and the upper end and the lower end of the UHPC upper bearing platform are respectively provided with a pier and a lower bearing platform;
the UHPC upper bearing platform comprises UHPC ring beams arranged on the outer ring, UHPC connecting beams are symmetrically arranged on the inner end faces of the UHPC ring beams, transverse prestressed tendons are arranged inside the UHPC connecting beams, traction cables are wound on the outer ring of the UHPC ring beams, traction cable anchors are arranged inside the UHPC upper bearing platform and are connected with one ends of the traction cables, and an upper spherical hinge is arranged at the bottom ends of the UHPC ring beams and the UHPC connecting beams.
Further, the outer side of the lower bearing platform is provided with a counter-force seat, the middle part of the upper end surface of the lower bearing platform is provided with a lower spherical hinge, the outer side of the upper end surface of the lower bearing platform is provided with a slideway corresponding to the UHPC ring beam, and the lower bearing platform is provided with a longitudinal prestressed rib in the slideway.
Further, the outer contour projection of the UHPC ring beam is circular, the vertical projection falls in the slideway, the gap between the bottom surface of the UHPC ring beam and the slideway is 0 mm-30 mm, the bottom surface of the UHPC ring beam is attached with a steel plate with the friction coefficient of 0.1-0.3, and the width of the steel plate is smaller than the width of the slideway.
Further, the heights of the UHPC continuous beams are equal or gradually increased from outside to inside, and the elevation of the bottom surface of the UHPC continuous beam is larger than that of the bottom surface of the UHPC ring beam.
Furthermore, the lower parts of the UHPC ring beam, the UHPC connecting beam and the pier are provided with transverse prestressed pore canals, the diameters of the transverse prestressed pore canals are larger than those of the transverse prestressed tendons, and the transverse prestressed tendons penetrate through the transverse prestressed pore canals to be a post-tensioning method.
Advantageous effects
The utility model provides a UHPC upper bearing platform for a bridge by a horizontal rotation method. Compared with the prior art, the method has the following beneficial effects:
(1) The ultra-high-strength material is adopted, so that the thickness and the volume of a traditional bearing platform are reduced, the excavation depth of a foundation pit is further reduced, and the construction cost is reduced;
(2) The method provides a more sufficient working surface for the sealing and reaming work, so that the vertical connection construction of the upper bearing platform and the lower bearing platform is convenient and reliable, and the casting quality of the sealing and reaming concrete is effectively ensured;
(3) The bottom of the UHPC upper bearing platform falls on the lower bearing platform slideway, so that the traditional supporting feet (concrete filled steel tube) are omitted, and the overturning of the swivel bridge can be effectively prevented by the UHPC upper bearing platform.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic diagram of the structure of the present utility model;
FIG. 4 is a schematic diagram of the configuration structure of the reinforcing steel bars and the prestressed tendons of the upper bearing platform of the UHPC before the swivel;
fig. 5 is a schematic diagram of the configuration structure of the reinforced bars in the hollowed-out area of the upper bearing platform of the UHPC after the rotation;
FIG. 6 is a schematic diagram of the structure of the rotating structure of the upper bearing platform of the UHPC;
FIG. 7 is a schematic diagram of the structure of the upper platform of the UHPC of the present utility model;
FIG. 8 is a schematic diagram of the structure of the upper platform of the UHPC of the present utility model;
FIG. 9 is a schematic diagram of the structure of the upper platform of the UHPC of the present utility model;
FIG. 10 is a schematic diagram of the structure of the upper platform of the UHPC of the present utility model;
FIG. 11 is a schematic diagram of the structure of the upper platform of the UHPC of the present utility model;
in the figure: the device comprises a lower bearing platform-1, a lower spherical hinge-2, a slideway-3, a counter-force seat-4, an upper spherical hinge-5, a pier-6, a transverse prestressed rib-7, an upper UHPC bearing platform-8, a ring beam of UHPC-81, a connecting beam of UHPC-82, a traction cable-9 and a longitudinal prestressed rib-10.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-11, the present utility model provides a technical solution: the utility model provides a UHPC upper bearing platform of horizontal-turning bridge, UHPC upper bearing platform 8 including space lattice structure, it adopts UHPC material because UHPC possesses super high strength, high toughness and high durability, compressive strength is greater than 120MPa, flexural strength reaches 25MPa, material durability reaches more than 200 years, by silica fume, cement, the water-reducing agent, fine aggregate and steel fiber's material are constituteed, both ends are equipped with pier 6 and lower bearing platform 1 respectively about UHPC upper bearing platform 8, lower bearing platform 1 outside is equipped with counter-force seat 4, lower bearing platform 1 up end middle part is equipped with down spherical hinge 2, lower bearing platform 1 up end outside is located the slide 3 that corresponds with UHPC ring beam 81, lower bearing platform 1 is in slide 3 inside and is equipped with vertical prestressing tendons 10.
The UHPC upper bearing platform 8 comprises UHPC ring beams 81 arranged on the outer ring, UHPC connecting beams 82 are symmetrically arranged on the inner end surface of the UHPC ring beams 81, the UHPC connecting beams 82 are connected with the lower part of the pier 6, transverse prestressed ribs 7 are arranged inside the UHPC connecting beams 82 so as to correspond to the UHPC ring beams 81, the UHPC connecting beams 82 and the lower part of the pier 6, transverse prestressed pore paths with the diameter larger than that of the transverse prestressed ribs 7 are arranged on the lower part of the UHPC connecting beams 82, the transverse prestressed ribs 7 penetrate through the transverse prestressed pore paths, a post-tensioning method is adopted, traction ropes 9 are wound on the outer ring of the UHPC ring beams 81, a traction rope anchor is arranged inside the UHPC upper bearing platform 8 and connected with one end of the traction ropes 9, the UHPC ring beams 81 and the bottom end of the UHPC connecting beams 82 are provided with upper spherical hinges 5, the outer contour projection of the UHPC ring beams 81 is round, vertical projections fall in the slideway 3, traction rope supporting steel bars or steel belts are arranged on the periphery so as to prevent the UHPC ring beams 81 from concentrating stress and locally crushing, the gap between the bottom surface of the UHPC ring beam 81 and the slideway 3 is 0 mm-30 mm, the friction coefficient of the bottom surface of the UHPC ring beam 81 is 0.1-0.3, the width of the steel plate is smaller than the width of the slideway 3, the height of the UHPC connecting beam 82 is equal to or gradually increases from outside to inside, the elevation of the bottom surface of the UHPC connecting beam 82 is larger than that of the bottom surface of the UHPC ring beam 81, longitudinal steel bars, transverse steel bars and stirrups are arranged in the UHPC upper bearing platform 8, the transverse steel bars pass through the UHPC ring beam 81, the UHPC connecting beam 82 and the lower part of the bridge pier 6, the transverse steel bars extend from the hollow area of the UHPC upper bearing platform 8 on the UHPC ring beam 81, the UHPC connecting beam 82 and the bridge pier 6, longitudinal steel bars or prestressed bars extend from the top surface of the lower bearing platform 1, the extension length of the transverse steel bars and the longitudinal steel bars is 30-60 times the diameter of the steel bars, the extension length of the longitudinal prestressed bars 10 is larger than the height of the UHPC upper bearing platform 1, and after the transverse steel bars and the longitudinal steel bars are matched in place, the steel reinforcement framework of the hollow area of the UHPC upper bearing platform 8 is formed, concrete is filled in the hollow area of the UHPC upper bearing platform 8 and gaps between the UHPC upper bearing platform 8 and the lower bearing platform 1 are filled with the concrete when the hollow area of the UHPC upper bearing platform 8 is hinged, the concrete can be micro-expanded concrete, the strength is not lower than the strength of the concrete of the pier 6, the reinforced concrete in the hollow area of the UHPC upper bearing platform 8 can be provided with longitudinal prestressed tendons 10 according to the requirement of a sealing disc, longitudinal prestressed duct diameters are correspondingly provided with longitudinal prestressed ducts, the longitudinal prestressed duct diameters are larger than the diameters of the longitudinal prestressed tendons 10, the longitudinal prestressed tendons 10 of the lower bearing platform 1 penetrate through the longitudinal prestressed duct, and the longitudinal prestressed tendons 10 are reinforced by the UHPC upper bearing platform 8 and the lower bearing platform 1.
Only a common reinforced concrete post-cast strip can be arranged between the UHPC upper bearing platform 8 and the bridge pier 6, and pre-tensioned steel wires are arranged in the UHPC upper bearing platform 8 at the moment so as to reduce the size of the component.
The working principle is as follows; the lower bearing platform 1 is cast twice to perform molding maintenance, the lower spherical hinge 2 and the slideway 3 are positioned and installed, then the upper spherical hinge 5 and the lower spherical hinge 2 are hung, the pier 6 is constructed, the transverse prestressed rib 7 is connected with a UHPC connecting beam 82 on the cast UHPC upper bearing platform 8, the UHPC connecting beam 82 corresponds to the slideway 3, a traction rope 9 is installed after the upper part of the pier 6 and an upper structure are constructed, the traction rope 9 penetrates into the traction machine of counter-force seats 4 on two sides of the lower bearing platform 1, the traction rope 9 is slowly tensioned, the horizontal condition of a swivel bridge is observed in real time, whether a large hole is formed between a steel plate at the bottom of the UHPC ring beam 81 and the slideway 3, a counterweight is timely adjusted when a large eccentricity appears, and after the swivel is completed, concrete casting is performed on a hollowed-out area of the UHPC upper bearing platform 8, so that the work is completed.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a level-turning bridge UHPC cushion cap which characterized in that includes
The UHPC upper bearing platform (8) with the space lattice structure is characterized in that bridge piers (6) and lower bearing platforms (1) are respectively arranged at the upper end and the lower end of the UHPC upper bearing platform (8);
UHPC upper bearing platform (8) is including locating UHPC girt (81) of outer lane, UHPC girt (81) interior terminal surface symmetry is equipped with UHPC and links roof beam (82), and inside be equipped with horizontal prestressing tendons (7) between UHPC links roof beam (82), UHPC girt (81) outer lane winding has traction cable (9), and is equipped with traction cable ground tackle and traction cable (9) one end connection in UHPC upper bearing platform (8) inside, UHPC girt (81) are equipped with spherical hinge (5) with UHPC link roof beam (82) bottom.
2. The leveling bridge UHPC top deck according to claim 1, wherein: the novel UHPC ring beam is characterized in that a counter-force seat (4) is arranged on the outer side of the lower bearing platform (1), a lower spherical hinge (2) is arranged in the middle of the upper end face of the lower bearing platform (1), a slideway (3) corresponding to the UHPC ring beam (81) is arranged on the outer side of the upper end face of the lower bearing platform (1), and a longitudinal prestressed tendon (10) is arranged inside the slideway (3) of the lower bearing platform (1).
3. The leveling bridge UHPC top deck according to claim 2, wherein: the outer contour projection of the UHPC ring beam (81) is circular, the vertical projection falls into the slideway (3), the gap between the bottom surface of the UHPC ring beam (81) and the slideway (3) is 0 mm-30 mm, the friction coefficient of the bottom surface of the UHPC ring beam (81) is 0.1-0.3, and the width of the steel plate is smaller than that of the slideway (3).
4. The leveling bridge UHPC top deck according to claim 2, wherein: the heights of the UHPC connecting beams (82) are equal or gradually increased from outside to inside, and the elevation of the bottom surface of the UHPC connecting beam (82) is larger than that of the bottom surface of the UHPC ring beam (81).
5. The leveling bridge UHPC top deck according to claim 2, wherein: the UHPC ring beam (81), the UHPC connecting beam (82) and the lower part of the bridge pier (6) are provided with transverse prestressed pore passages, the diameters of the transverse prestressed pore passages are larger than those of the transverse prestressed ribs (7), and the transverse prestressed ribs (7) penetrate through the transverse prestressed pore passages to be a post-tensioning method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321780954.XU CN220704343U (en) | 2023-07-07 | 2023-07-07 | UHPC upper bearing platform for horizontal rotation bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321780954.XU CN220704343U (en) | 2023-07-07 | 2023-07-07 | UHPC upper bearing platform for horizontal rotation bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220704343U true CN220704343U (en) | 2024-04-02 |
Family
ID=90440079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321780954.XU Active CN220704343U (en) | 2023-07-07 | 2023-07-07 | UHPC upper bearing platform for horizontal rotation bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220704343U (en) |
-
2023
- 2023-07-07 CN CN202321780954.XU patent/CN220704343U/en active Active
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