Precast beam joint connecting assembly for rapid construction
By pre-buried steel bars on the bridge prefabricated bridge deck and equipped with half-nose grooves, the problems of complex construction of existing wet joints and fatigue in welded joints are solved, and rapid welding-free construction and efficient concrete pouring are achieved.
Patent Information
- Application Number
- CN202422271766.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The existing wet joint connection scheme requires a large amount of steel bar welding and concrete pouring in bridge construction, resulting in complex construction and low efficiency, and fatigue problems with welded joints.
A rapid construction of prefabricated beam joint connection assembly is designed, by prefabricating transverse and longitudinal reinforcement on the prefabricated bridge deck and providing half-nose grooves at the joints to form a cast cavity to reduce welding work and concrete volume.
Weldless construction has been achieved, which reduces on-site labor demand and concrete pouring, increases construction speed and structural connection strength, and alleviates the fatigue problem of steel bars in wet joints.
Smart Images
Figure CN222990561U_ABST
Abstract
Description
Technical Field
[0001] The present utility model relates to the technical field of bridge engineering, and specifically relates to a rapid construction precast beam joint connection component. Background Art
[0002] At present, the main wet joint connection scheme for the superstructure of assembled bridges is to transport precast beams such as small box girders and T-beams to the site, weld the steel bars protruding from the bridge deck on site to ensure the reliability of the connection, and then cast in situ to form an integral whole. This kind of wet joint is a rigid wet joint, which can transfer shear force and bending moment from one beam to the adjacent beam. However, due to the large number of reserved steel bars and the large width of the wet joint, a large amount of labor may be required on site to weld the wet joint, and the amount of cast-in-place concrete is also very large, making the on-site construction very complicated and reducing the assembly efficiency of precast segmental bridges. At the same time, under the action of vehicle loads, there are also potential fatigue problems for the welded joints of the bridge deck steel bars. Summary of the Invention
[0003] To solve the above problems, the present utility model discloses a rapid construction precast beam joint connection component, which eliminates a large amount of steel bar welding work and reduces the amount of concrete pouring work, and speeds up the on-site construction speed.
[0004] To achieve the above object, the present utility model provides the following technical solution: A rapid construction precast beam joint connection component, comprising a precast bridge deck, steel bars and a concrete layer. The precast bridge deck includes a left precast bridge deck and a right precast bridge deck. Semi-nose-shaped grooves are provided vertically on the connecting sides of the left precast bridge deck and the right precast bridge deck. The semi-nose-shaped grooves vertically provided on the side of the left precast bridge deck and the semi-nose-shaped grooves vertically provided on the side of the right precast bridge deck are spliced to form a casting cavity, and steel bars and a concrete layer are provided in the casting cavity.
[0005] Further, the steel bars include transverse steel bars, and transverse steel bars are embedded in the left precast bridge deck and the right precast bridge deck.
[0006] Further, the transverse steel bars embedded in the left precast bridge deck and the transverse steel bars embedded in the right precast bridge deck are longitudinally staggered.
[0007] Further, transverse steel bar anchoring plates are provided at the ends of the transverse steel bars.
[0008] Further, the steel bars include longitudinal steel bars, and the longitudinal steel bars are used to be inserted into the casting cavity from one end close to the left precast bridge deck and the right precast bridge deck, closely adhering to the upper and lower layers of transverse steel bars.
[0009] Further, stirrups are used to hoop the longitudinal steel bars.
[0010] Compared with the existing technologies, the present utility model has the following beneficial effects: (1) The upper and lower layers of steel bars formed by adding transverse steel bar anchoring plates to the ends of the transverse steel bars can reliably transfer bending moments and axial tensile forces, enabling the longitudinal deformation coordination at the structural connection parts, allowing for construction without welding, and effectively alleviating the fatigue problem of the steel bars in the wet joint. (2) Vertically arranged semi-nose-shaped grooves are provided on the sides at the joints of the left precast bridge deck and the right precast bridge deck, improving the force transfer effect of the wet joint. (3) The left precast bridge deck and the right precast bridge deck serve as the formwork for pouring the wet joint, and fresh concrete is poured above, realizing the rapid construction of the wet joint without a bottom formwork. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 FIG. is the elevation layout drawing before pouring the joint of the precast beam for rapid construction of the present utility model.
[0012] Figure 2 FIG. is the elevation drawing of the joint pouring of the precast beam for rapid construction of the present utility model.
[0013] Figure 3 FIG. is the plan drawing of the joint pouring of the precast beam for rapid construction of the present utility model.
[0014] Reference numerals in the drawings: 1, left precast bridge deck; 2, right precast bridge deck; 3, transverse steel bar; 4, transverse steel bar anchoring plate; 5, longitudinal steel bar; 6, stirrup; 7, concrete layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] As Figures 1 - 3 shown; the present utility model provides a technical solution: a rapid construction precast beam joint connection assembly, including precast bridge decks, steel bars, and a concrete layer 7. The precast bridge decks include a left precast bridge deck 1 and a right precast bridge deck 2. Vertically arranged semi-nose-shaped grooves are provided on the connecting sides of the left precast bridge deck 1 and the right precast bridge deck 2. The vertically arranged semi-nose-shaped groove on the side of the left precast bridge deck 1 and the vertically arranged semi-nose-shaped groove on the side of the right precast bridge deck 2 are spliced to form a pouring cavity, and steel bars and a concrete layer 7 are provided in the pouring cavity.
[0016] Among them, the steel bars include transverse steel bars 3, and transverse steel bars 3 are embedded in the left precast bridge deck 1 and the right precast bridge deck 2.
[0017] Among them, the transverse steel bars 3 embedded in the left precast bridge deck 1 and the transverse steel bars 3 embedded in the right precast bridge deck 2 are longitudinally staggered.
[0018] Among them, transverse steel bar anchoring plates 4 are provided at the ends of the transverse steel bars 3.
[0019] Among them, the steel bars include longitudinal steel bars 5, and the longitudinal steel bars 5 are used to be inserted into the casting cavity closely attached to the upper and lower layer of transverse steel bars 3 from one end close to the left precast bridge deck 1 and the right precast bridge deck 2.
[0020] Among them, stirrups 6 are used to hoop around the longitudinal steel bars 5.
[0021] First, fabricate the internal steel bars, transverse steel bars 3 and the transverse steel bar anchoring plates 4 at one end of the transverse steel bars 3 of the left precast bridge deck 1 and the right precast bridge deck 2. Extend a part of the transverse steel bars 3 of the left precast bridge deck 1 and the right precast bridge deck 2 out of the sides of the left precast bridge deck 1 and the right precast bridge deck 2. Vertically semi-nose-shaped grooves are provided on the sides at the joints of the left precast bridge deck 1 and the right precast bridge deck 2. Splice the vertically semi-nose-shaped groove of the left precast bridge deck 1 and the vertically semi-nose-shaped groove of the right precast bridge deck 2 together to form a casting cavity. The precast concrete at the lower part of the casting cavity serves as the casting formwork for the wet joint. Reserve a 1 cm gap at the lower end of the splicing joint between the adjacent left precast bridge deck 1 and the right precast bridge deck 2. Bind and connect the longitudinal steel bars 5 and the transverse steel bars 3, and hoop the stirrups 6 around the longitudinal steel bars 5. Pour wet joint concrete into the casting cavity formed by the left precast bridge deck 1 and the right precast bridge deck 2 to form an integral bridge deck. The thickness of the step structure of the integral bridge deck is 1 / 4 to 1 / 5 of the average thickness of the left precast bridge deck 1 and the right precast bridge deck 2. The cast-in-place wet joint concrete is C60 steel fiber concrete.
[0022] There is no need to set up the wet joint bottom formwork on site, which can greatly improve the on-site construction speed. And by adding transverse steel bar anchoring plates 4 at the ends of the transverse steel bars 3, the connection strength between adjacent precast beams is strengthened, making the overall performance of the wet joint concrete better.
[0023] Although the embodiments of the present utility have been shown and described; for those of ordinary skill in the art; it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility; the scope of the present utility is defined by the appended claims and their equivalents.
Claims
1. A fast-construction prefabricated beam joint connection assembly, comprising a prefabricated bridge deck, steel bars and a concrete layer (7), characterized in that: The prefabricated bridge deck comprises a left prefabricated bridge deck (1) and a right prefabricated bridge deck (2); a side vertical semi-nose-shaped groove is provided on the connecting side of the left prefabricated bridge deck (1) and the right prefabricated bridge deck (2); the side vertical semi-nose-shaped groove of the left prefabricated bridge deck (1) and the side vertical semi-nose-shaped groove of the right prefabricated bridge deck (2) are spliced to form a casting cavity; a steel bar and a concrete layer (7) are provided in the casting cavity.
2. A fast-construction prefabricated beam joint connection assembly according to claim 1, characterized in that: The steel bars include transverse steel bars (3) which are pre-embedded in the left prefabricated bridge deck (1) and the right prefabricated bridge deck (2).
3. A fast-construction prefabricated beam joint connection assembly according to claim 2, characterized in that: The internally embedded transverse steel bars (3) of the left prefabricated bridge deck (1) and the internally embedded transverse steel bars (3) of the right prefabricated bridge deck (2) are arranged in a longitudinally staggered manner.
4. A fast-construction prefabricated beam joint connection assembly according to claim 3, characterized in that: The end of the transverse reinforcement (3) is provided with a transverse reinforcement anchoring plate (4).
5. A fast-construction prefabricated beam joint connection assembly according to claim 4, characterized in that: The steel bars include longitudinal steel bars (5), which are used to be inserted into the casting cavity from one end close to the left prefabricated bridge deck (1) and the right prefabricated bridge deck (2) in close contact with the upper and lower transverse steel bars (3).
6. A fast-construction prefabricated beam joint connection assembly according to claim 5, characterized in that: The stirrups (6) are used to be clamped on the longitudinal reinforcement (5).